Patent Application
20200190743
The present application is based on, and claims priority from JP Application Serial Number 2018-235980, filed Dec. 18, 2018, the disclosure of which is hereby incorporated by reference herein in its entirety.
The present disclosure relates to a sheet manufacturing apparatus, a recording sheet, and a sheet manufacturing method.
In the related art, using paper referred to as security paper is proposed as a method of enhancing security. This type of paper is configured by a magnetic wire being embedded in the paper (for example, refer to JP-A-2005-146477). When an alternating magnetic field of a predetermined frequency is applied to this type of paper, the magnetic wire embedded in the paper emits a steep pulse signal during the magnetization reversal. By detecting the pulse signal using a detection device, it is possible to detect the paper containing the magnetic wire.
The manufacturing method of security paper of the related art is supplying an aqueous suspension containing a magnetic wire onto a paper manufacturing feedstock and subsequently draining the water content to form a sheet. In this method, there is a problem in that a large amount of water is necessary for the manufacturing of the security paper.
According to an aspect of the present disclosure, there is provided a sheet manufacturing apparatus including a web forming section that accumulates a feedstock containing fibers in a gas to form a web, an arranging section that arranges at least one magnetic body on the web while the web is transported, and a processing section that processes the web on which the at least one magnetic body is arranged into a sheet.
In the sheet manufacturing apparatus, the arranging section may arrange the at least one magnetic body at a fixed position with respect to a transport path of the web.
In the sheet manufacturing apparatus, the at least one magnetic body may have a longitudinal shape, the at least one magnetic body may include a plurality of magnetic bodies, and the arranging section may arrange the plurality of magnetic bodies such that directions of the magnetic bodies are three or more different directions.
In the sheet manufacturing apparatus, the arranging section may arrange the plurality of magnetic bodies including three magnetic bodies arranged such that directions of the three magnetic bodies are different from each other by 60°±50°.
In the sheet manufacturing apparatus, the arranging section may arrange, as the at least one magnetic body, a wire rod of a predetermined length containing a magnetic body.
In the sheet manufacturing apparatus, the arranging section may include a guide configured to pivot in a direction in which an angle of the guide changes relative to a transport direction of the web, and the arranging section may arrange the magnetic wire rod along the guide.
The sheet manufacturing apparatus may further include a cutting section that cuts the sheet processed by the processing section to have a predetermined length, in which the cutting section may cut the sheet at a position at which a contained proportion of the at least one magnetic body is less than 1.0 parts by weight with respect to 100 parts by weight of the sheet after the cutting.
In the sheet manufacturing apparatus, the feedstock containing fibers may contain a resin which is melted by heating to bond the fibers, and the processing section may heat the web on which the at least one magnetic body is arranged to process the web into the sheet.
The sheet manufacturing apparatus may further include a coating process section that adheres a coating material to the at least one magnetic body arranged on the web or the sheet.
According to another aspect of the present disclosure, there is provided a recording sheet including a sheet formed of a feedstock containing fibers and magnetic wire rods containing magnetic bodies arranged on the sheet, in which less than 1.0 parts by weight of the magnetic wire rods are contained with respect to 100 parts by weight of the sheet, and the plurality of magnetic wire rods is arranged such that the magnetic wire rods face three or more directions different from each other.
In the recording sheet, the plurality of magnetic wire rods may be arranged such that directions of the magnetic wire rods are different from each other by 60°±5°.
According to still another aspect of the present disclosure, there is provided a sheet manufacturing method including a web forming step of accumulating a feedstock containing fibers in a gas to form a web, an arranging step of transporting the web and arranging a magnetic body on the web that is transported, and a processing step of processing the web on which the magnetic body is arranged into a sheet.
The sheet manufacturing method may further include a cutting step of cutting the sheet processed in the processing step to have a predetermined length, in which the cutting step may cut the sheet at a position at which a contained proportion of the magnetic body is less than 1.0 parts by weight with respect to 100 parts by weight of the sheet after the cutting.
Hereinafter, a detailed description will be given of favorable embodiments of the present disclosure using the drawings. The embodiments described hereinafter are not to be construed as limiting the content of the present disclosure described in the claims. All of the configurations which are described hereinafter are not necessarily essential constituent elements of the present disclosure.
The sheet manufacturing apparatus 100 is an apparatus which fibrizes a feedstock MA containing fibers to manufacture a sheet S. The feedstock MA may be any feedstock containing fibers. For example, it is possible to use wood-based pulp material, kraft pulp, old paper, synthetic pulp, or the like. When using old paper as the feedstock MA, it is possible to regard the sheet manufacturing apparatus 100 as a recycling apparatus which executes a recycling process of recycling the old paper into the new sheet S. The sheet S is an example of a recording sheet. The same applies to sheets S1 to S5 (described later).
The sheet manufacturing apparatus 100 is capable of producing a plurality of kinds of sheets S and, for example, is capable of adjusting the bonding strength and the whiteness of the sheet S, and of adding functions such as color, scent, and flame-proofing according to purpose by mixing additives into the feedstock MA. The sheet manufacturing apparatus 100 is capable of adjusting the density, thickness, size, and shape of the sheet S. Representative examples of the sheet S include products such as paper plates in addition to sheet-like products such as printing paper of standard sizes such as A4 and A3, cleaning sheets such as floor cleaning sheets, sheets for oil dirtying, and toilet cleaning sheets.
The sheet manufacturing apparatus 100 is provided with a supply section 10, a crushing section 12, a defibrating section 20, a sorting section 40, a first web forming section 45, a rotating body 49, a mixing section 50, a dispersing section 60, a second web forming section 70, a web transport section 79, a processing section 80, and a cutting section 90. The sheet manufacturing apparatus 100 is provided with an arranging section 30.
These sections execute a manufacturing step of manufacturing the sheet S from the feedstock MA in the order the sections are listed. The sheet manufacturing apparatus 100 forms a pressurized sheet SS1 and a heated sheet SS2 (described later) as intermediate products in the manufacturing step of the sheet S.
The sheet manufacturing apparatus 100 includes a defibrating process section 101 and a web forming section 102. The defibrating process section 101 manufactures a mixture MX and the web forming section 102 manufactures a second web W2 from the mixture MX. In other words, the defibrating process section 101 manufactures the mixture MX which is a material for manufacturing the second web W2.
The defibrating process section 101 may be configured to include the supply section 10, the defibrating section 20, the sorting section 40, the first web forming section 45, the rotating body 49, and the mixing section 50. The defibrating process section 101 includes the mixing section 50 when the mixing section 50 is directly supplied with a material MC from outside the sheet manufacturing apparatus 100.
The web forming section 102 includes the dispersing section 60 and the second web forming section 70. The web forming section 102 may include the web transport section 79 and the web forming section 102 may include the arranging section 30 (described later).
The supply section 10 is an automatic feeding device which stores the feedstock MA and continually feeds the feedstock MA into the crushing section 12. The feedstock MA may be any feedstock containing fibers, for example, old paper, waste paper, or pulp sheets.
The crushing section 12 is provided with a crushing blade 14 which cuts the feedstock MA supplied by the supply section 10, the crushing section 12 using the crushing blade 14 to cut the feedstock MA in the air into rectangular shreds having a size of several centimeters square. The shape and size of the shreds are arbitrary. It is possible to use a shredder, for example, for the crushing section 12. The feedstock MA cut by the crushing section 12 is gathered in a hopper 9 and is transported to the defibrating section 20 via a tube 2.
The defibrating section 20 defibrates the crushed pieces that are cut by the crushing section 12. Defibration is processing in which the feedstock MA in a state in which a plurality of fibers is bonded together is untangled into single or a small number of fibers. It is possible to refer to the feedstock MA as a defibration target object. It is possible to anticipate an effect of causing matter such as resin particles, ink, toner, and a bleeding inhibitor adhered to the feedstock MA to separate from the fibers due to the defibrating section 20 defibrating the feedstock MA. An object which passes the defibrating section 20 is referred to as a defibrated object. In addition to the defibrated object which is untangled, the defibrated object may include resin particles which separate from the fibers when untangling the fibers, colorants such as ink and toner, and additives such as a bleeding inhibitor and paper strengthener. The resin particles contained in the defibrated object are a resin in which the fibers in a plurality of fibers are caused to bond to each other during the manufacturing of the feedstock MA. The fibers contained in the defibrated object may be present in an independent state of not being tangled with other fibers. Alternatively, the fibers may be tangled with another untangled defibrated object to form a lump and be present in a state of forming so-called clumps.
The defibrating section 20 is a device that defibrates the crushed pieces cut by the crushing section 12 using a dry system. It is possible to configure the defibrating section 20 using a defibrator such as an impeller mill, for example. The defibrating section 20 of the present embodiment is a mill provided with a cylindrical stator 22 and a rotor 24 which rotates in the inside of the stator 22, and formed with defibrating blades on the inner circumferential surface of the stator 22 the outer circumferential surface of the rotor 24. The crushed pieces are pinched between the stator 22 and the rotor 24 to be defibrated by the rotation of the rotor 24. A defibrated object MB defibrated by the defibrating section 20 is fed from the discharge port of the defibrating section 20 to the tube 3. The dry system indicates that the processes such as the defibrating are performed not in a liquid but in a gas such as in the air.
The crushed pieces are transported from the crushing section 12 to the defibrating section 20 by an air current. The defibrated object MB is sent from the defibrating section 20 to the sorting section 40 via the tube 3 by an air current. These air currents may be generated by the defibrating section 20, and a blower (not illustrated) may be provided to generate the air currents.
The sorting section 40 sorts the components contained in the defibrated object MB according to the size of the fibers. The size of the fibers mainly indicates the length of the fibers.
The sorting section 40 of the present embodiment includes a drum section 41 and a housing section 43 which houses the drum section 41. The drum section 41 is a so-called sieve such as a mesh having openings, a filter, or a screen, for example. Specifically, the drum section 41 has a cylindrical shape and is rotationally driven by a motor, and at least a portion of the circumferential surface is a mesh. The drum section 41 may be configured by a metal mesh, expanded metal in which a metal plate having cuts therein is stretched out, perforated metal, or the like.
The defibrated object MB which is introduced into the inside of the drum section 41 from an inlet 42, through the rotation of the drum section 41, is divided into a passed object which passes through the openings in the drum section 41 and the residue which does not pass through the openings. The passed object which passes through the openings contains fibers, particles, and the like smaller than the openings and is a first sorted object. The residue contains fibers, non-defibrated pieces, clumps, and the like larger than the openings and is referred to as a second sorted object. The first sorted object descends the inside of the housing section 43 toward the first web forming section 45. The second sorted object is transported to the defibrating section 20 via a tube 8 from a discharge port 44 communicating with the inside of the drum section 41.
Instead of the sorting section 40, the sheet manufacturing apparatus 100 may be provided with a classifier which separates the first sorted object and the second sorted object. The classifier makes use of an air current and includes a filter, a cyclone classifier, an elbow-jet classifier.
The first web forming section 45 includes a mesh belt 46 positioned under the drum section 41 and forms a first web W1 by shaping the first sorted object separated by the sorting section 40 into a web-like form.
The first web forming section 45 includes the mesh belt 46, stretch rollers 47, and a suction section 48. The mesh belt 46 is an endless metal belt and bridges across the plurality of stretch rollers 47. One or more of the stretch rollers 47 is driven to rotate by a motor or the like (not illustrated) and causes the mesh belt 46 to move. The mesh belt 46 goes around a track configured by the stretch rollers 47. A portion of the track of the mesh belt 46 is planar under the drum section 41 and configures a planar surface of the mesh belt 46.
Multiple openings are formed in the mesh belt 46 and, of the first sorted object which descends from the drum section 41, a component that is larger than the openings in the mesh belt 46 accumulates on the mesh belt 46. The component of the first sorted object that is smaller than the openings in the mesh belt 46 passes through the openings. The component which passes through the openings in the mesh belt 46 is referred to as a third sorted object, and, for example, contains fibers shorter than the openings in the mesh belt 46, resin particles separated from the fibers by the defibrating section 20, and particles including ink, toner, a bleeding inhibitor, and the like.
The suction section 48 is coupled to a blower (not illustrated) and suctions the air from the bottom of the mesh belt 46 using a suction force of the blower. The air which is suctioned from the suction section 48 is discharged together with the third sorted object which passes through the openings in the mesh belt 46.
Since the air current generate by the suction of the suction section 48 attracts the first sorted object which descends from the drum section 41 toward the mesh belt 46, there is an effect of promoting accumulation.
The component which accumulates on the mesh belt 46 becomes web-like and configures the first web W1. In other words, the first web forming section 45 forms the first web W1 from the first sorted object sorted by the sorting section 40.
The main component of the first web W1 is fibers larger than the openings in the mesh belt 46, of the components contained in the first sorted object, and the first web W1 is formed to be soft and light and to contain much air. The first web W1 is transported to the rotating body 49 in accordance with the movement of the mesh belt 46.
The rotating body 49 is provided with a plurality of plate-like blades and is driven to rotate by a motor (not illustrated). The rotating body 49 is disposed at an end portion of the track of the mesh belt 46 and comes into contact with the mesh belt 46 at which the first web W1 transported by the mesh belt 46 protrudes from the mesh belt 46. The first web W1 is untangled by the rotating body 49 colliding with the first web W1, becomes small fiber lumps, passes through the tube 7, and is transported to the mixing section 50. The material obtained by cutting the first web W1 with the rotating body 49 is a material MC. The material MC is obtained by removing the third sorted object from the first sorted object and the main component of the material MC is fibers.
In this manner, the sorting section 40 and the first web forming section 45 have a function of separating the material MC mainly containing fibers from the defibrated object MB.
In the transport path of the mesh belt 46, a moisture adjusting section 77 is provided between the first web forming section 45 and the rotating body 49. The moisture adjusting section 77 is a mist system humidifier which turns water into mist form and supplies the mist toward the mesh belt 46 and is provided with, for example, a tank storing water and an ultrasonic vibrator which turns the water into mist form. The water content of the first web W1 is adjusted due to the moisture adjusting section 77 supplying the mist, and adherence of fibers to the mesh belt 46 caused by static electricity and the like are suppressed. The moisture adjusting section 77 may be configured to be coupled to a vaporizing humidifier which adjusts the moisture in the air and to supply the air which is humidified by the vaporizing humidifier to the mesh belt 46.
The mixing section 50 is provided with an additive supply section 52 and a mixing blower 56. The mixing section 50 may include a tube 54 which transports the material MC and the additive material AD to the mixing blower 56.
The additive supply section 52 is a device which supplies the additive material AD to the tube 54 and the additive material AD is added to the material MC by the additive supply section 52.
The additive supply section 52 is provided with an additive cartridge 52a which accumulates the additive material AD. The additive cartridge 52a is a tank storing the additive material AD and may be attachable and detachable to and from the additive supply section 52. The additive supply section 52 is provided with an additive dispensing section 52b which dispenses the additive material AD from the additive cartridge 52a and an additive feeding section 52c which discharges the additive material AD dispensed by the additive dispensing section 52b to the tube 54. The additive dispensing section 52b is provided with a feeder which sends the additive material AD to the additive feeding section 52c. The feeder is capable of changing the feed-out amount according to the feedstock. The additive feeding section 52c is provided with a shutter capable of opening and closing and sends the additive material AD to the tube 54 by opening the shutter.
The additive material AD may contain a bonding material for bonding a plurality of fibers together. The bonding material is a synthetic resin or a natural resin, for example. The resin contained in the additive material AD is melted when passing through the processing section 80 to bond the plurality of fibers together. The resin is a thermoplastic resin or a heat curing resin, for example, the resin is AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin, polyethylene terephthalate, polyphenylene ether, polybutylene terephthalate, nylon, polyamide, polycarbonate, polyacetal, polyphenylene sulfide, polyether ether ketone, or the like. These resins may be used on their own or in a mixture, as appropriate.
The additive material AD may contain components other than the resin which bonds the fibers together. For example, depending on the kind of the sheet S to be manufactured, the additive material AD may contain a colorant for coloring the fibers, an agglomeration inhibitor for preventing aggregation of the fibers and aggregation of the resin, a flame retardant for rendering the fibers and the like less susceptible to burning, and the like. The additive material AD may be fiber form and may be powder form.
The mixing blower 56 generates an air current in the tube 54 joining the tube 7 to the dispersing section 60 and mixes the material MC and the additive material AD together. The mixing blower 56 is provided with, for example, a motor, blades driven to rotate by the motor, and a case storing the blades. The mixing blower 56 may be provided with, in addition to the blades generating the air current, a mixer which mixes the material MC and the additive material AD together. Hereinafter, the mixture mixed in the mixing section 50 will be referred to as a mixture MX. The mixture MX is transported to the dispersing section 60 by the air current generated by the mixing blower 56 and is introduced to the dispersing section 60.
The dispersing section 60 untangles the fibers of the mixture MX and causes the untangled fibers to descend onto the second web forming section 70 while dispersing the fibers in the atmosphere. When the additive material AD is a fiber shape, these fibers are also untangled by the dispersing section 60 and descend onto the second web forming section 70.
The dispersing section 60 includes a drum section 61 and a housing 63 housing the drum section 61. The drum section 61 is a cylindrical structural body configured in the same manner as the drum section 41, for example. The drum section 61 is driven to rotate by a motor or the like (not illustrated) and functions as a sieve. The drum section 61 has an opening and causes the mixture MX untangled by the rotation of the drum section 61 to descend from the opening. Accordingly, the mixture MX descends from the drum section 61 in an inside space 62 formed in the inside of the housing 63.
The second web forming section 70 is disposed below the drum section 61. The second web forming section 70 includes a mesh belt 72, stretch rollers 74, and a suction mechanism 76.
The mesh belt 72 is configured by an endless metal belt similar to the mesh belt 46 and bridges across a plurality of stretch rollers 74. One or more of the stretch rollers 74 is driven to rotate by a motor or the like (not illustrated) and drives the mesh belt 72. The mesh belt 72 moves in a transport direction indicated by symbol F1 while going around a track configured by the stretch rollers 74. A portion of the track of the mesh belt 72 is planar on the bottom of the drum section 61 and configures a planar surface of the mesh belt 72.
Multiple openings are formed in the mesh belt 72 and, of the mixture MX which descends from the drum section 61, a component that is larger than the openings in the mesh belt 72 accumulates on the mesh belt 72. The component of the mixture MX that is smaller than the openings in the mesh belt 72 passes through the openings.
The suction mechanism 76 uses the suction force of a blower (not illustrated) to suction the air from the opposite side of the mesh belt 72 from the drum section 61. The component that passes through the openings in the mesh belt 72 is sucked up by the suction mechanism 76. The air current generated by the suction of the suction mechanism 76 attracts the mixture MX descending from the drum section 61 toward the mesh belt 72 to promote the accumulation of the mixture MX. The air current of the suction mechanism 76 forms a downflow in the path in which the mixture MX descends from the drum section 61 and it is possible to anticipate an effect of preventing the tangling of the fibers while the fibers fall.
In the transport path of the mesh belt 72, a moisture adjusting section 78 is provided downstream of the dispersing section 60. The moisture adjusting section 78 is a mist system humidifier which turns water into mist form and supplies the mist toward the mesh belt 72 and is provided with, for example, a tank storing water and an ultrasonic vibrator which turns the water into mist form. The water content of the second web W2 is adjusted due to the moisture adjusting section 78 supplying the mist and adherence of fibers to the mesh belt 72 caused by static electricity and the like are suppressed. The moisture adjusting section 78 may be configured to be coupled to a vaporizing humidifier which adjusts the moisture in the air and to supply the air which is humidified by the vaporizing humidifier to the mesh belt 72.
The second web W2 is peeled from the mesh belt 72 and transported to the processing section 80 by the web transport section 79. The web transport section 79 includes a mesh belt 79a, a roller 79b, and a suction mechanism 79c. The suction mechanism 79c is provided with a blower (not illustrated) and generates an upward air current through the mesh belt 79a using the suction force of the blower. It is possible to configure the mesh belt 79a using an endless metal belt having openings similar to the mesh belt 46 and the mesh belt 72. The mesh belt 79a is moved by the rotation of the roller 79b and moves on a turning track. In the web transport section 79, the second web W2 separates from the mesh belt 72 and is adhered to the mesh belt 79a due to the suction force of the suction mechanism 79c. The second web W2 moves with the mesh belt 79a and is transported to the processing section 80.
The processing section 80 is provided with a pressurizing section 82 and a heating section 84. The pressurizing section 82 is provided with a pair of pressurizing rollers 85, 85 and pressurizes the second web W2 at a predetermined nipping pressure to adjust the thickness of the second web W2 and increase the density of the second web W2. The pressurized sheet SS1 is formed from the second web W2 due to the processing of the pressurizing section 82.
The heating section 84 is provided with a pair of heating rollers 86 and bonds the fibers originating from the material MC using the resin contained in the additive material AD by applying heat to the pressurized sheet SS1. Accordingly, the heated sheet SS2 is formed from the pressurized sheet SS1. The heated sheet SS2 is a sheet-like intermediate product subjected to pressurization and heating by the processing section 80 in which the strength, elasticity, and density of the second web W2 are increased. The heated sheet SS2 is transported to the cutting section 90.
The cutting section 90 is provided with a cutter 91. The cutter 91 is driven by an actuator or the like (not illustrated) to perform a process of pinching and cutting the heated sheet SS2 and to manufacture the sheet S of a set size. The cutter 91 cuts the heated sheet SS2 in a direction intersecting a transport direction F, for example. The cutting section 90 may be provided with a second cutter which cuts the heated sheet SS2 in a direction parallel to the transport direction F.
The sheet S cut by the cutting section 90 is discharged to a discharge portion 96. The discharge portion 96 is provided with a tray or a stacker which stores the sheet S. The user is capable of taking out and using the sheet S stored in the discharge portion 96.
The sheet manufacturing apparatus 100 is not limited to the configuration in which the first web W1 is transported in processes of the rotating body 49 onward. For example, the first web W1 may be taken out from the sheet manufacturing apparatus 100 and stored. A mode may be adopted in which the first web W1 is sealed in a predetermined package and transporting and transaction are possible. In this case, in the sheet manufacturing apparatus 100, a configuration may be adopted in which the first web W1 which is stored is supplied to the rotating body 49 or the mixing section 50 and it is possible to manufacture the sheet S.
Hereinabove, the operations of the sheet manufacturing apparatus 100 are controlled by a control device 110. The control device 110 controls at least the defibrating section 20, the additive supply section 52, the mixing blower 56, the dispersing section 60, the second web forming section 70, the processing section 80, and the cutting section 90 to execute the manufacturing method of the sheet S. The control device 110 may control the operations of the supply section 10, the sorting section 40, the first web forming section 45, and the rotating body 49.
The arranging section 30 is provided downstream of the second web forming section 70. The arranging section 30 is disposed between the dispersing section 60 and the moisture adjusting section 78 in the transport path of the mesh belt 72, for example. The arranging section 30 arranges magnetic bodies configured by a magnetic material on the second web W2. Although the shape and size of the magnetic bodies are arbitrary, a magnetic body having a longitudinal shape is an example of a preferable magnetic body. A specific example of the magnetic bodies is a magnetic body wire in which the magnetic material is formed into wire shapes having a length in the order of several millimeters or more. In the present embodiment, a description is given of an example in which magnetic wires MW formed by shaping the magnetic material into wire shapes are arranged on the surface of the second web W2 using the arranging section 30. The magnetic wires MW are an example of the magnetic body wire.
In the present embodiment, the arranging section 30 includes wire arranging mechanisms 31 and 32. The wire arranging mechanism 31 and the wire arranging mechanism 32 are both disposed in positions corresponding to the transport path FW of the second web W2. In detail, the wire arranging mechanism 31 and the wire arranging mechanism 32 are both disposed above the second web W2 placed on the mesh belt 72. Support tables 311 may be at positions separated from the second web W2 in plan view, and the support tables 311 may be positioned such that the entirety of the wire arranging mechanisms 31 and 32 is at a position overlapping the second web W2 in plan view.
A roll MR is set in each of the wire arranging mechanisms 31 and 32. Each of the rolls MR is formed by winding the magnetic body wire into a roll shape.
The wire arranging mechanism 31 includes the support tables 311, cutters 313, and guides 315. The wire arranging mechanism 32 is configured in a similar manner.
The magnetic wires MW pulled out from the rolls MR are placed on the support tables 311. The cutters 313 cut the magnetic wires MW on the support tables 311.
Feed-out mechanisms which feed out the magnetic wires MW from the rolls MR may be provided on the support tables 311. Specifically, it is possible to configure the feed-out mechanism to be provided with a motor, a gear or a link mechanism which rotates the roll MR using the motive force of the motor, and a guide which guides the magnetic wires MW fed out through the rotation of the roll MR to the support table 311. Alternatively, it is possible to configure the feed-out mechanism to be provided with a pair of feed-out rollers which pinch the magnetic wires MW pulled out from the roll MR and a motor which rotates the feed-out rollers to pull the magnetic wires MW toward the support table 311.
The guides 315 guide the cut magnetic wires MW onto the second web W2. The guides 315 are joined to the support tables 311 and the distal ends of the guides 315 reach the top of the second web W2. For example, the guides 315 are chutes which allow the magnetic wires MW to slide to the second web W2. The guides 315 are disposed such that the end portions on the second web W2 side of the guides 315 are at lower positions than the end portions on the support table 311 side of the guides 315. The guides 315 may have a plate shape, may be configured to include a movable portion as in a roller conveyor, and may be configured to include a drive section which conveys the magnetic wires MW.
The magnetic wires MW which are cut by the cutters 313 slide on the guides 315 through the weight of the magnetic wires MW themselves and fall onto the second web W2.
The guides 315 are disposed to extend from the cutting positions CP toward the center of the second web W2 as illustrated in
The angles of the guides 315 relative to the transport direction F of the second web W2 change due to the guides 315 pivoting. Since the magnetic wires MW slide on the guides 315 to reach the second web W2, the angles of the magnetic wires MW relative to the transport direction F are determined by the angles of the guides 315.
The guides 315 may be provided with mechanisms capable of carrying the magnetic wires MW. The mechanisms may be configured by transport belts or screws, for example.
The sheet S containing the magnetic wires MW is manufactured by the arranging section 30 arranging the magnetic wires MW on the second web W2. The magnetic wires MW having orientations corresponding to the angles of the guides 315 are arranged on the sheet S. The plurality of magnetic wires MW is dispersed and arranged on the second web W2 due to the wire arranging mechanisms 31 and 32 periodically cutting the magnetic wires MW and supplying the magnetic wires MW to the second web W2 in a state in which the second web W2 is being transported.
The sheet S1 is a rectangular sheet cut to A4 size, for example, by the cutting section 90 and may be used as printing paper for the purpose of printing using a printer in the same manner as paper such as normal paper. The sheet S1 includes nine of the magnetic wires MW. These magnetic wires are assigned symbols 401 to 409.
The magnetic wires 401, 402, and 403 are arranged at different angles from each other inside the surface of the sheet S1. Here, X-Y Cartesian coordinates are set using the short-side direction of the sheet S1 as the X direction and using the long-side direction of the sheet S1 as the Y direction. In this case, the magnetic wire 401 is parallel to the X-axis, the magnetic wire 402 has an inclination of an angle 01 relative to the X-axis, and the magnetic wire 403 has an inclination of an angle θ2 relative to the X-axis. Similarly, the magnetic wires 404 and 407 are parallel to the X-axis, the magnetic wires 405 and 408 have an inclination of the angle θ1 relative to the X-axis, and the magnetic wires 406 and 409 have an inclination of the angle 02 relative to the X-axis.
In this manner, in the sheet S1, the nine magnetic wires 401 to 409 are arranged to face three directions. It is preferable that the angles θ1 and θ2 be 60°±5° (60°=60 [arc degrees]=π/3 [rad]) and 120°±5° (120°=120 [arc degrees]=2π/3 [rad]). In this case, the magnetic wires 401, 402, and 403 are arranged on the sheet S1 at orientations of different from each other by 60°±5°. The same applies to the magnetic wires 404 to 409. Three of the magnetic wires 401 to 409 are arranged in the respective three directions in the sheet S1. When the magnetic wire 401 has a direction that is not parallel to the X-axis, θ1 and θ2 are each corrected by a corresponding amount.
The sheet S may be used as security paper by including the magnetic wires MW.
The security paper is a tag detectable by a detection system provided with an exciting coil and a detecting coil realized in the form of paper. When an alternating current is caused to flow in the exciting coil to generate an alternating magnetic field and the sheet S is placed in the alternating magnetic field, a pulse form current flows in the detecting coil positioned in the vicinity of the magnetic wires MW during the magnetization reversal. It is possible to detect the presence of the sheet S using the pulse form current.
Therefore, since it is possible to detect the sheet S that passes through a gate through which people or vehicles may pass by disposing the exciting coil and the detecting coil in the gate, it is possible to detect the sheet S being taken out. For example, there is a merit in that it is possible to prevent leaking of classified information when classified information or the like is printed onto the sheet S.
It is preferable that the magnetic material which configures the magnetic wires MW be a magnetic material which causes a great Barkhousen effect. For example, FeCr-based, FeCo-based, and FeNi, FeSiB, and FeCoSiB-based alloys. Although these materials may be given the great Barkhousen effect by applying strain using after-processing, since an amorphous wire exhibits the great Barkhousen effect even in the unchanged state in which the wire is created, this is beneficial for usage in the present embodiment. An amorphous ribbon may be cut to form a wire. The same metals may be pulled together with glass from a molten state, cooled, and form glass-coated wires.
The shape of the magnetic wires MW suitable for causing the great Barkhousen effect is not particularly limited as long as the shape is long such as a wire shape or a rod shape. In order to cause the great Barkhousen effect, it is preferable that the shape be of a predetermined length with respect to the cross-sectional area, and basically, it is preferable that the shape be a wire shape or a band shape, and it is more preferable that the shape be a wire shape.
When the magnetic material is a wire shape, as described above, it is preferable that the diameter be greater than or equal to 10 μm in order to cause the great Barkhousen effect. Although the maximum diameter is not particularly limited, it is sufficient for the magnetic wires MW to not excessively and greatly protrude from the surface of the sheet S. For example, the thickness of the magnetic wires MW may be less than or equal to a diameter of 100 μm.
The length of the magnetic wires MW is preferably greater than or equal to 10 mm and more preferably longer than 50 mm in order to cause the great Barkhousen effect. Although an upper limit of the length of the magnetic wires MW is not particularly limited, the length preferably does not exceed the size of the cut sheet S. Although the diameter and the length of the magnetic wires MW preferably satisfy the above-described ranges of the diameter and length for all of the magnetic wires MW contained in the sheet S, when there is a distribution of values, it is preferable that the diameter and the length of the magnetic wires MW satisfy the above-described ranges as average values.
The number and direction of the magnetic wires MW arranged on the sheet S influence the detectability as security paper.
Here, a device including a pair of detectors disposed on both sides of a path to interpose the path is anticipated as the detection device which detects the sheet S. Each of the detectors includes an exciting coil which generates the alternating magnetic field and a detecting coil. An alternating magnetic field which intersects the path is generated in the path by the pair of detectors. When the sheet S passes between the detectors, a voltage pulse is generated in the magnetic wires MW arranged on the sheet S during the magnetization reversal and the pulse is detected by the detecting coil.
In this configuration, when the angle between the magnetic wires MW arranged on the sheet S and the magnetic field is small, the sheet S is easy to detect using the detecting coil. Therefore, when the sheet S includes the plurality of magnetic wires MW facing in different directions, a state in which the sheet S is easily detected by the detection device occurs frequently.
Therefore, it is preferable that a plurality of the magnetic wires MW facing different directions be arranged on the sheet S and it is more preferable that the magnetic wires MW facing three or more directions be arranged on the sheet S. The sheet S1 includes the magnetic wires 401, 402, and 403 arranged to be 60°±5 different from each other. In this configuration, in a state in which the sheet S is positioned between the detectors, a state in which the sheet S1 is easily detected occurs more frequently. Therefore, it can be said that the sheet S is easily detected by the detecting coil and that the detectability as so-called security paper is high.
The wire arranging mechanisms 31 and 32 are capable of arranging the magnetic wires MW at different directions relative to the transport direction F of the second web W2 by rotating the guides 315. Therefore, by stopping the guides 315 at three or more different directions and feeding out the magnetic wires MW onto the second web W2, it is possible to arrange the magnetic wires MW which face three or more different directions on the second web W2.
It is possible to define the number of magnetic wires MW arranged on the sheet S using the weight in the sheet S cut by the cutting section 90, for example. For example, when the weight of the sheet S is set to 100 parts by weight, it is preferable that the weight of the magnetic wires MW be less than 1.00 parts by weight. For example, when nine of the magnetic wires MW, each having a diameter of 100 μm and a length of 52 mm, are arranged on the single sheet S cut to A4 size with a density of 60 g/m2 to 80 g/m2, the weight of the magnetic wires MW is less than 1% of the weight of the sheet S and the condition is satisfied.
In other words, the sheet manufacturing apparatus 100 cuts the heated sheet SS2 using the cutting section 90 at a position at which the weight of the magnetic wires MW is less than 1.00 parts by weight when the weight of the sheet S is 100 parts by weight and manufactures the sheet S.
When the sheet S configured in this manner is used as printing paper or the like, the difference in weight in comparison with ordinary printing paper such as PPC paper is small. Therefore, it is possible to use the sheet S in the same manner as ordinary printing paper. Therefore, it is possible to realize the sheet S that has security characteristics as security paper and may be used easily.
A sheet S2 of
The sheet S2 includes nine of the magnetic wires MW in the same manner as the sheet S1. The magnetic wires are assigned symbols 411 to 419.
The magnetic wires 411, 412, and 413 are arranged parallel to the short sides of the sheet S2. The magnetic wires 414, 415, and 416 are arranged to have an inclination of 60°±5°, for example, relative to the magnetic wire 411. The magnetic wires 417, 418, and 419 are arranged to have an inclination of 60°±5°, for example, relative to the magnetic wire 414. Therefore, the nine magnetic wires MW are arranged on the sheet S2 to face three different directions and there are three of the magnetic wires MW for each direction.
In the sheet S1 described above, the magnetic wires 401 to 409 form groups having three wires each and are arranged regularly in the sheet S1. In contrast, in the sheet S2, the magnetic wires 411 to 419 are arranged irregularly in the surface of the sheet S2. Since both the sheet S1 and the sheet S2 include the magnetic wires MW arranged on three or more different directions and there are three or more of the magnetic wires MW for each direction, the detectability is high and the applicability is great as so-called security paper.
A plurality of magnetic bodies 421 configured by the plurality of magnetic wires MW is arranged on the sheet S3 of
A plurality of magnetic bodies 422 configured by the plurality of magnetic wires MW is arranged on the sheet S4 of
In the examples illustrated in
In the sheets S3 and S4, since the plurality of magnetic wires MW is arranged such that the magnetic wires MW face different directions and there are six of the magnetic wires MW for each direction, the detectability as security paper is high. Since the magnetic bodies 421 and 422 are arranged regularly, the number of the magnetic wires MW per unit length of the sheets S3 and S4 is maintained at a fixed level. Therefore, there is a merit in that it is possible to manage the number of magnetic wires MW of the sheets S3 and S4 based on the size at which the sheets S3 and S4 are cut by the cutting section 90.
Step SA1 is a crushing step of crushing the feedstock MA. The sheet manufacturing apparatus 100 executes the crushing step using the crushing section 12.
Step SA2 is a defibrating step of defibrating crushed pieces of the feedstock MA crushed in step SA1 in an atmosphere to generate a defibrated object MB. The sheet manufacturing apparatus 100 executes the defibrating step using the defibrating section 20.
Step SA3 is a separating step. In the separating step, particles of resin, additive, and the like are separated from the defibrated object MB containing the fibers, resin particles, and the like and a material MC having fibers as the main component is extracted. The sheet manufacturing apparatus 100 executes the separating step using the sorting section 40 and the first web forming section 45. The rotating body 49 may be included in the functional sections which execute the separating step.
Step SA4 is an adding step of adding the additive material AD to the material MC. The sheet manufacturing apparatus 100 executes the adding step using the additive supply section 52.
Step SA5 is a mixing step of mixing the additive material AD added in the adding step and the material MC together. The sheet manufacturing apparatus 100 executes the mixing step using the mixing blower 56 of the mixing section 50.
Step SA6 is a sieving step of sieving the mixture MX to disperse the mixture MX in the atmosphere and causing the result to descend. The sheet manufacturing apparatus 100 executes the dispersing step using the dispersing section 60.
Step SA7 is a web forming step of accumulating the mixture MX which descends in the sieving step of step SA6 to form a web. The sheet manufacturing apparatus 100 executes the web forming step using the second web forming section 70 and the web formed by step SA7 is the second web W2.
Step SA8 is an arranging step of arranging the magnetic wires MW on the web formed in step SA7. The sheet manufacturing apparatus 100 executes the arranging step using the arranging section 30.
Step SA9 is a processing step of carrying out pressurizing and heating on the second web W2. In the pressurizing and heating steps, pressurizing and heating are performed on the second web W2 and the heated sheet SS2 is formed. Although the order of the pressurizing and the heating in the pressurizing and heating steps is not limited, in the present embodiment, the pressurizing is performed first. In other words, in step SA9, the second web W2 is pressurized to form the pressurized sheet SS1 and the pressurized sheet SS1 is heated to form the heated sheet SS2. The sheet manufacturing apparatus 100 executes the processing step using the processing section 80.
Step SA10 is a cutting step of cutting the heated sheet SS2 according to a set size and shape and forming the sheet S. The sheet manufacturing apparatus 100 executes the cutting step using the cutting section 90.
The sheet manufacturing apparatus 100 arranges the magnetic wires MW on the second web W2 and subsequently processes the second web W2 using the processing section 80. Therefore, when the second web W2 is pressurized by the pressurizing section 82, the magnetic wires MW closely adhere to the fibers of the material MC and the particles of the additive material AD contained in the second web W2. Since soft fibers and the additive material AD are exposed on the surface of the second web W2 before the second web W2 is pressurized by the pressurizing section 82, the magnetic wires MW easily and closely adhere to the fibers. When the second web W2 or the pressurized sheet SS1 on which the magnetic wires MW are arranged is heated by the heating section 84, the additive material AD melts and bonds the fibers in the material MC to each other and bonds the fibers and the magnetic wires MW to each other. Therefore, in the heated sheet SS2 and the sheet S, the magnetic wires MW strongly adhere to the fibers originating in the feedstock MA. Therefore, it is possible to use the sheet S as paper such as PPC paper without the magnetic wire MW falling out from the sheet S.
As described above, the sheet manufacturing apparatus 100 is provided with the web forming section 102, the arranging section 30, and the processing section 80. The web forming section 102 accumulates the feedstock containing fibers in a gas to form the second web W2. The arranging section 30 arranges magnetic bodies on the second web W2 while the second web W2 is transported. The processing section 80 processes the second web W2 on which the magnetic bodies are arranged into a sheet.
The sheet manufacturing method realized by the sheet manufacturing apparatus 100 includes the web forming step, the arranging step, and the processing step. The web forming step accumulates the feedstock containing fibers and the additive material AD which bonds the fibers in a gas to form the second web W2. The arranging step transports the second web W2 and arranges magnetic bodies on the second web W2 that is transported. The processing step processes the second web W2 on which the magnetic bodies are arranged into the sheet S.
In the present embodiment, the magnetic wires MW which are magnetic wire rods of a predetermined length containing magnetic bodies are arranged on the second web W2 as the magnetic bodies.
In the present embodiment, the feedstock containing the fibers and the additive material AD which bonds the fibers is accumulated in a gas to form the second web W2.
According to the sheet manufacturing apparatus 100 and the sheet manufacturing method realized by the sheet manufacturing apparatus 100, it is possible to manufacture the sheet S which is usable as security paper by arranging the magnetic bodies on the second web W2 containing the fibers and the additive material AD. The manufacturing steps of the sheet S are dry-system steps in which a large amount is unnecessary, which is beneficial as compared to a wet system since the processes of water supplying and draining are unnecessary. Since it is possible to ascertain the positions of the magnetic bodies in the sheet S at high precision, it is possible to manage the detectability as security paper.
In the sheet manufacturing apparatus 100, the arranging section 30 arranges the magnetic wires MW at fixed positions with respect to the transport path FW of the second web W2. Therefore, since the magnetic wires MW are arranged at fixed positions in the sheet S manufactured by the sheet manufacturing apparatus 100, it is possible to suppress variations in the detectability of the sheet S as security paper.
The sheet manufacturing apparatus 100 uses the magnetic wires MW having a longitudinal shape as the magnetic bodies. The arranging section 30 arranges the plurality of magnetic wires MW such that the directions of the magnetic wires MW are three or more different directions. Therefore, it is possible to detect the sheet S at a high degree of certainty using a detection device which detects the magnetic wires MW using magnetism. Therefore, it is possible to manufacture the sheet S which has high detectability as security paper.
The arranging section 30 arranges the plurality of magnetic wires MW containing three of the magnetic wires MW arranged such that the angles thereof are 60°±5° different from each other. With regard to the sheet S, the range over which the magnetic wires MW are detectable by the detection device is wide with respect to the relative position between the sheet S and the detection device. Therefore, since there are little restrictions for detecting the sheet S using the detection device, it is possible to manufacture security paper having high detectability.
The arranging section 30 includes the guides 315 capable of pivoting in directions which change the angles of the guides 315 relative to the transport direction F of the second web W2 and arrange the magnetic wires MW along the guides 315. Accordingly, it is possible to cause the magnetic wires MW to face different directions in the second web W2 using the arranging section 30 of a simple configuration.
The sheet manufacturing apparatus 100 is provided with the cutting section 90 which cuts the heated sheet SS2 processed by the processing section 80 to a predetermined length. The cutting section 90 cuts the heated sheet SS2 at a position at which the contained proportion of the magnetic wires MW is less than 1.0 parts by weight with respect to 100 parts by weight of the sheet S after the cutting. Accordingly, it is possible to manufacture security paper having a similar weight to that of the ordinary printing paper on which the magnetic wires MW are not arranged.
The additive material AD contains a resin which melts through being heated and bonds the fibers. The processing section 80 heats the second web W2 on which the magnetic wires MW are arranged to process the second web W2 into the heated sheet SS2. Therefore, when the second web W2 is heated by the processing section 80, the magnetic wires MW and the fibers are bonded by the additive material AD. Therefore, it is possible to manufacture the security paper from which the magnetic wires MW do not easily fall out and which is easy to handle.
The sheet S manufactured in the present embodiment is configured by a feedstock containing fibers and the additive material AD which bonds the fibers. The sheet S includes the magnetic wires MW containing the magnetic bodies arranged on the sheet configured by the fibers and the additive material AD. The magnetic wires MW of less than 1.0 parts by weight are contained with respect to 100 parts by weight of the sheet S and the plurality of magnetic wires MW is arranged such that the magnetic wires MW face three or more different directions from each other.
When the sheet S is detected by the detection device which detects the magnetic wires MW using magnetism, there are little restrictions relating to the position and posture of the sheet S and the sheet S is detected with a high degree of certainty. Therefore, the sheet S has high detectability as security paper.
In the sheet S, the plurality of magnetic wire rods arranged on the sheet S is arranged such that the directions of the magnetic wire rods are 60°±5° different from each other. Therefore, the range over which the magnetic wires MW are detectable by the detection device is wide with respect to the relative position between the sheet S and the detection device. Therefore, since there are little restrictions for detecting the sheet S using the detection device, it is possible to manufacture security paper having high detectability.
The arranging section 30A is configured by installing a plurality of the wire arranging mechanisms 31 on a base 34 disposed to straddle the transport path FW. The base 34 is installed in a direction intersecting the transport direction F and is installed at a height at which the base 34 does not come into contact with the second web W2.
The wire arranging mechanism 31 includes configurations that are shared with those provided in the arranging section 30. The wire arranging mechanisms 31 support the rolls MR and cut the magnetic wires MW pulled out from the rolls MR using the cutters 313 on the support tables 311. The wire arranging mechanisms 31 arrange the cut magnetic wires MW on the second web W2 using the guides 315.
In the example of
In each of the wire arranging mechanisms 31, the guide 315 is capable of pivoting in the directions indicated by R3 in the diagram. The directions R3 are directions in which the guides 315 are swung in directions intersecting the width direction, that is, the transport direction F of the second web W2. Therefore, each of the wire arranging mechanisms 31 is capable of arranging the magnetic wires MW at different positions in the width direction of the second web W2. The guides 315 are capable of arranging the magnetic wires MW to face different directions relative to the transport direction F. For example, the guides 315 are capable of arranging the magnetic wires MW in a direction parallel to the transport direction F, a direction inclined by 60° (60°±5°) to one side in the width direction of the second web W2 relative to the transport direction F, and a direction inclined by 60° (60°±5°) to the other side. In this case, since the magnetic wires MW arranged on the second web W2 have differences in angle of 60° (60°±5°) from each other, it is possible to realize the arrangements of the sheets S1, S2, S3, and S4 illustrated in
The arranging section 30A is capable of placing the magnetic wires MW on the second web W2 in the same manner as the arranging section 30 and arranges a plurality of the magnetic wires MW to face different directions. Therefore, it is possible to obtain similar effects to those of the configuration described in the first embodiment.
The number and the disposition state of the wire arranging mechanisms 31 provided in the sheet manufacturing apparatus 100 are not limited to the examples illustrated as the arranging sections 30 and 30A. For example, a plurality of the wire arranging mechanisms 31 may be disposed along the transport direction F on one side of the transport path FW. Four or more of the wire arranging mechanisms 31 may be disposed and one of the wire arranging mechanisms 31 may be disposed. The wire arranging mechanism 31 may be provided with a movement mechanism which moves the wire arranging mechanism 31 in directions intersecting the transport direction F.
The sheet manufacturing apparatus 100A described in the third embodiment is configured similarly to the sheet manufacturing apparatus 100 described in the first embodiment except for in that a coating process section 38 is provided. In the third embodiment, constituent parts which are shared with the sheet manufacturing apparatus 100 will be given the same symbols and the description thereof will be omitted.
The coating process section 38 is disposed between the pressurizing section 82 and the heating section 84 in the sheet manufacturing apparatus 100A. A constituent part including the pressurizing section 82, the coating process section 38, and the heating section 84 is a processing section 80A. The coating process section 38 corresponds to an example of a coating process section.
The coating process section 38 adheres a coating material CO to the surface of the pressurized sheet SS1 pressurized by the pressurizing section 82. The coating process section 38 includes an ejection head which ejects the coating material CO toward the pressurized sheet SS1 according to the control of the control device 110. The ejection head is configured similarly to a print head of an ink jet printer using a piezoelectric element, for example.
After the coating process section 38 adheres the coating material CO to the pressurized sheet SS1, the pressurized sheet SS1 is heated by the heating section 84. Due to being heated by the heating section 84, the additive material AD contained in the pressurized sheet SS1 bonds the fibers to each other and the fibers to the magnetic wires MW. The coating material CO adhered to the pressurized sheet SS1 is also dried or fixed by the heating.
The coating material CO adhered to the pressurized sheet SS1 by the coating process section 38 is a liquid containing a synthetic resin and preferably contains an insulating synthetic resin. The coating material CO may be a solution in which a synthetic resin is dissolved in an aqueous solvent or an organic solvent and may be a mixed liquid in which minute particles of synthetic resin are dispersed. It is preferable that the coating material CO be the same color as the heated sheet SS2 when the coating process section 38 ejects the coating material CO or after being heated by the heating section 84.
The magnetic wires 401 to 409 are arranged on the sheet S5 similarly to in the sheet S1 illustrated in
The coating process section 38 adheres the coating material CO to match the positions of the magnetic wires 401 to 409. The range over which the coating process section 38 adheres the coating material CO may be the entire surface of the sheet S5, that is, the entirety of the pressurized sheet SS1, and as illustrated in
The sheet S5 including the coating layers 441 has an effect of reducing the influence of the magnetic wires MW on the surface characteristics of the sheet S5 since the magnetic wires MW are not exposed. Accordingly, an improvement may be anticipated in the print quality when using the sheet S5 as printing paper. For example, when printing on the sheet S5 using a laser printer, it is possible to cause the discharging characteristics on the surfaces of the magnetic wires MW to approach those of the portions in which the magnetic wires MW are not present. Therefore, it is possible to reduce the influence on the fixing properties of the printing originating in differences in the discharging characteristics between the magnetic wires MW and the fibers configuring the sheet S5. It is possible to configure the coating layers 441 to have hydrophilicity. In this case, when carrying out the printing on the sheet S5 using an ink jet printer, the ink is also well fixed to the surfaces of the magnetic wires MW. Therefore, it is possible to obtain an improvement in the print quality on the sheet S5 in various printing systems. An improvement may be anticipated in the feel when touching the sheet S5 by coating the magnetic wires MW with the coating layers 441. When the coating layers 441 are non-transparent layers or low-transparency layers, there is an effect of rendering the magnetic wires MW visually less apparent.
Steps SA1 to SA8 are shared with the manufacturing steps described in the first embodiment.
Step SA11 executed continuing from step SA8 is a pressurizing step of pressurizing the web on which the magnetic wires MW are arranged. In the pressurizing step, the sheet manufacturing apparatus 100A uses the pressurizing section 82 to pressurize the second web W2 on which the magnetic wires MW are arranged to form the pressurized sheet SS1.
Step SA12 is a coating step of adhering the coating material CO to the pressurized sheet SS1. The sheet manufacturing apparatus 100A executes the coating step using the coating process section 38 and adheres the coating material CO to the portions coating the magnetic wires MW on the pressurized sheet SS1.
Step SA13 is a heating step of heating the web to which the coating material CO is adhered in the coating step. In the heating step, the sheet manufacturing apparatus 100A uses the heating section 84 to heat the pressurized sheet SS1 to which the coating material CO is adhered and forms the heated sheet SS2.
After step SA13, the heated sheet SS2 is cut according to a set size and shape in the cutting step of step SA10.
In this manner, the sheet manufacturing apparatus 100A includes the coating process section 38 which adheres the coating material CO serving as the coating material to the magnetic wires MW which are the magnetic bodies. Therefore, since the sheet manufacturing apparatus 100A coats the magnetic wires MW arranged on the sheet S with the coating material CO, it is possible to avoid exposure of the surfaces of the magnetic wires MW. Therefore, it is possible to obtain improvements in the feel when touching the sheet S and the color of the sheet S in addition to an improvement in the print quality when using the sheet S as printing paper.
In the third embodiment, although the coating process section 38 is configured to adhere the coating material CO to the pressurized sheet SS1 on which the magnetic wires MW are arranged, the configuration is not limited thereto. For example, the coating process section 38 may be disposed upstream of the pressurizing section 82 in the transport direction F and adhere the coating material CO to the second web W2 before the pressurizing. The coating process section 38 may be disposed downstream of the heating section 84 and be configured to adhere the coating material CO to the heated sheet SS2.
The embodiments described above are merely specific modes which embody the present disclosure, do not limit the present disclosure, and as indicated hereinafter, for example, may be embodied in various modes within a scope not departing from the gist of the present disclosure.
For example, in the embodiments, although the magnetic wire MW cut from the roll MR is exemplified as the magnetic body arranged on the second web W2 by the arranging section 30, the present disclosure is not limited thereto. For example, a configuration may be adopted in which the magnetic wires MW cut to a predetermined size in advance are stocked in the wire arranging mechanisms 31 and 32 and the magnetic wires MW are fed out toward the second web W2 one or multiple wires at a time. When the magnetic wires MW which are the magnetic wire rods are arranged on the sheet S, the thickness of the sheet S does not increase excessively, and when using the sheet S as printing paper or the like, the difference in thickness and unevenness is small and the convenience is great as compared to ordinary paper such as PPC paper. An element in which a coil is wound on a magnetic wire rod may be arranged on the second web W2 instead of the magnetic wire MW which is a magnetic wire rod. For example, a bistable magnetic element known as a Wiegand wire may be arranged on the second web W2.
In the embodiments, although the sheet manufacturing apparatuses 100 and 100A are described as apparatuses which defibrate the feedstock MA using the defibrating section 20 and manufacture the sheet S, a configuration not provided with the defibrating process section 101 may be adopted. For example, a configuration may be adopted in which the material MC containing the fibers defibrated in advance is supplied to the mixing section 50. A configuration may be adopted in which the mixture MX in which the material MC containing the fibers defibrated in advance and the additive material AD are mixed together is supplied to the dispersing section 60.
Naturally, it is possible to arbitrarily modify the other detailed configurations.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2018-235980 | Dec 2018 | JP | national |
