Patent Application
20220258939
The present invention relates to a film-packaged tissue assembly package in which a plurality of film-packaged tissues in each of which a bundle of tissue paper obtained by folding and stacking tissue paper is packaged with a flexible packaging film is collectively gusset-packaged.
A tissue paper package (hereinafter, also referred to as a box product) also called a box tissue in which a bundle of tissue paper is contained in a paper storage box called a carton box is well known.
A box product 101B is excellent in shape stability of a paper storage box which is an outer shell. Therefore, as illustrated in
Meanwhile, a tissue paper package also called a film-packaged tissue is known in which a bundle of tissue paper is package with a flexible resin packaging film. As the film-packaged tissue, a portable one called a pocket tissue is well known. However, there is also a non-portable film-packaged tissue used in a stationary manner like a box product or used for a refill of a bundle of the box product.
The film-packaged tissue used in a stationary manner or the like, like the box product, has advantages in terms of reduction of packaging materials, transportation cost due to compactness, and portability as compared with the box product. However, in this type of film-packaged tissue, a bundle of flexible tissue paper is packaged with a flexible packaging film. Therefore, the film-packaged tissue has a problem that shape retention is inferior to that of the box product, and shape retention suitable for storefront stacking cannot be obtained only by simply stacking a plurality of film-packaged tissues and forming the film-packaged tissues into assembly packaging with a film as in the case of the box product.
In view of such a problem, in a technique disclosed in the following Patent Literature 1, by forming a suction and exhaust hole in a film-packaged tissue to make the film-packaged tissue compressible, and forming the film-packaged tissue into assembly packaging in a gusset packaging manner such that the film-packaged tissue is restrained by an assembly packaging film in a compressed state, shape retention is enhanced like the box product as a whole, and the film-packaged tissue is suitable for storefront stacking.
However, when such a compressed state continues for a long period of time, fullness of tissue paper is likely to be reduced. In particular, in tissue paper having a high moisture content such as moisturizing tissue containing a liquid chemical or in a high humidity environment, fullness of the tissue paper is more likely to be reduced.
On the other hand, for assembly packaging of a film-packaged tissue, gusset packaging suitable for a flexible packaging object such as a toilet roll is preferable. In addition, a film-packaged tissue assembly package mainly used in a stationary manner, which is different from a portable one, usually has a size not to be contained in a bag, and has a certain degree of weight. Therefore, gusset packaging with a grip portion is preferable.
However, this gusset packaging easily forms spaces particularly on a top surface side and a bottom surface side due to a structure thereof. Therefore, when compressibility of the film-packaged tissue is lowered to simply lower restraint performance, the contained film-packaged tissue easily moves. In the film-packaged tissue, a sealed portion formed by thermal fusion or the like of a packaging film is hard. Therefore, when the contained film-packaged tissue easily moves, the hard portion and an exterior film constituting the gusset packaging are rubbed against each other, and a risk of breakage increases.
Therefore, a main object of the present invention is to provide a film-packaged tissue assembly package, for example, mainly used in a stationary manner like a box product, the film-packaged tissue assembly package being hardly reduced in fullness of contained tissue paper, being excellent in shape retention, for example, to be easily stacked and sold at a storefront, and being hardly damaged in an assembly packaging film. Furthermore, there is also provided a film-packaged tissue assembly package which is excellent in an opening property and portability of the assembly package while being excellent in a take-out property of a contained film-packaged tissue.
Means for solving the above problems are as follows. A first means is
a film-packaged tissue assembly package including a gusset packaging bag having a grip portion on a top surface side and a plurality of film-packaged tissues arranged and packaged in the gusset packaging bag, wherein
each of the film-packaged tissues is overlap-packaged and has end surfaces formed by of sealed portions of tube openings at both ends in a longitudinal direction, and
the overlap-packaged film-packaged tissues are gusset-packaged such that each end surface faces the top surface side having the grip portion and a bottom surface side facing the top surface side, and the longitudinal direction is along a top-bottom direction.
A second means is
the film-packaged tissue assembly package according to the first means, wherein
the film-packaged tissue paper is obtained by overlap-packaging a bundle of tissue paper having a substantially rectangular parallelepiped shape in which a plurality of sheets of tissue paper is folded and stacked, and has a take-out port forming portion of the tissue paper on an upper surface, and the end surface formed of sealed portions of tube openings is located facing a short side surface of the bundle.
A third means is
the film-packaged tissue assembly package according to the first or second means, wherein
packaging is performed such that the plurality of film-packaged tissues is arranged in a substantially rectangular parallelepiped shape such that the end surfaces are substantially flush with each other and long side surfaces are substantially flush with each other, and gusset portions of the gusset packaging bag face upper or lower surface of the film-packaged tissues.
A fourth means is
the film-packaged tissue assembly package according to the third means, wherein
two or less stages of the film-packaged tissues are arranged in the gusset packaging bag in the top-bottom direction such that the end surfaces butt against each other.
A fifth means is
the film-packaged tissue assembly package according to the third or fourth means, wherein
the film-packaged tissue assembly arranged in the gusset packaging bag has a compression ratio of 80% or more in a direction orthogonal to the top-bottom direction.
A sixth means is
the film-packaged tissue assembly package according to any one of the first to fifth means, wherein
the film-packaged tissues each have a bundle filling ratio of 100% or more.
The present invention described above provides a film-packaged tissue assembly package which is hardly reduced in fullness of contained tissue paper, is excellent in shape retention, for example, to be easily stacked and sold at a storefront, and is hardly damaged in an assembly packaging film. Furthermore, the present invention also provides a film-packaged tissue assembly package which is excellent in an opening property and portability of assembly packaging while being excellent in a pop-up property of a contained film-packaged tissue.
Hereinafter, the present invention will be described with reference to
In a film-packaged tissue assembly package 10 (hereinafter, also referred to as an assembly package) according to the present invention, a plurality of film-packaged tissues 1 in which a bundle 3 obtained by folding and stacking a plurality of sets of tissue paper 2 is packaged with a flexible packaging film 4 is arranged and gusset-packaged so as to be contained in a gusset packaging bag 13 having a grip portion 45 on a top surface side.
The film-packaged tissue 1 according to the present invention is obtained by overlap-packaging the bundle 3. The overlap packaging is a packaging mode also referred to as caramel packaging or combined packaging, and as illustrated in
In this overlap packaging, since the end surface 4A has a substantially planar shape, an exterior of the packaging film 4 has a substantially rectangular parallelepiped shape close to a box. In addition, the end surface 4A is formed by stacking and bonding a plurality of layers of the packaging film 4, and therefore has high rigidity, is hardly crushed, and easily maintains a substantially rectangular parallelepiped shape.
Therefore, when the film-packaged tissue 1 is overlap-packaged, a product shape thereof is a substantially rectangular parallelepipedon. Therefore, even when the film-packaged tissues 1 are arranged and formed into assembly packaging as illustrated in
It is desirable that the bundle 3 of tissue paper contained in the film-packaged tissue 1 is a pop-up type. Particularly as illustrated in
The pop-up type bundle 3 has a substantially rectangular parallelepiped shape having a pair of longitudinal side surfaces 3B in which folded edges 2C of sheets of the tissue paper 2 are lined up, a pair of short side surfaces 3A in which the folded edges 2C are not lined up, and a pair of flat surfaces (upper and lower surfaces) 3C connected to the short side surfaces 3A and the longitudinal side surfaces 3B. In addition, the pop-up type bundle 3 is constituted by the soft tissue paper 2, and therefore has flexibility and is easily compressed and deformed.
The number of sets of the tissue paper 2 constituting the bundle 3 is not limited, but is generally 120 to 240 as one set of 2 plies (two sheets stacked) or 3 plies (three sheets stacked). The size of the bundle 3 is not necessarily limited, but a bundle of 150 sets of 2-ply tissue paper has a height of about 40 to 50 mm×160 to 200 mm in a longitudinal direction (width)×90 to 110 mm in a short direction (depth). Note that as illustrated in this shape, the film-packaged tissue 1 according to the present invention is not a portable tissue called a pocket tissue or the like having about 10 to 12 sets of contained tissue paper and a height of about 10 mm.
In the film-packaged tissue 1 in the illustrated mode, the end surface 4A sealing the barrel opening 4Z is located at a position facing the short side surface 3A of the bundle 3, and an opening perforation 5 is formed at a position facing the uppermost tissue paper 2 of the bundle 3 of the packaging film 4. In particular, the film-packaged tissue paper 1 in the illustrated mode is obtained by overlap-packaging the pop-up type bundle 3 of tissue paper 2 having a substantially rectangular parallelepiped shape obtained by folding a sheet of the tissue paper 2 in half, and stacking a plurality of sheets of the tissue paper 2 such that the folded pieces 2B of other sheets of the tissue paper 2 located above and below the folded sheet are located in the inner side 2A of the folded sheet. The illustrated film-packaged tissue paper 1 has a take-out port forming portion 5 of tissue paper on an upper surface, and has the end surface 4A which is a sealing portion of the barrel opening 4X facing the short side surface 3A where the folded edges 2C of the bundle 3 are not lined up.
In the bundle 3 of a pop-up type as in the illustrated mode, when an uppermost sheet of the tissue paper 2 of the bundle 3 is pulled out from an opening port formed in the upper surface, a part of a next sheet of the tissue paper located immediately below the pulled-out sheet is exposed from the opening port. In addition, in the film-packaged tissue 1 configured in this manner, tissue paper is stacked in a direction in which the end surface 4A having high rigidity stands, and therefore the bundle 3 is hardly compressed, and fullness is hardly reduced even if a compressive force from a bundle stacking direction (up-down direction) is applied.
Note that in the film-packaged tissue 1, in order to prevent bursting or the like when an external pressure is applied, a suction and exhaust hole communicating with the inside and the outside may be formed. On the end surface 4A facing the short side surface 3A where the folded edges 2C of the bundle 3 of the packaging film 4 are not lined up, the suction and exhaust hole may be formed, but it is desirable that there is no suction and exhaust hole at this position. When the suction and exhaust hole is formed on the end surface 4A, fragility of the end surface 4A increases. Therefore, the advantage of the overlap packaging having the end surface 4A having high rigidity is deteriorated.
As illustrated in
In particular, as a preferable shape of the take-out port forming portion 5, as illustrated in
The width (length in the short direction) of the slit 51 is 10 mm or less, and preferably 7 mm or less in the short direction. As illustrated in
In a case of a take-out port formed in such a shape of the take-out port forming portion 5, an edge vicinity 51A of the slit portion 51 is a free edge piece that is easily moved in an up-down direction. Therefore, when a set of tissue paper is pulled out from a bundle, the edge piece is deformed in a direction in which the set of tissue paper is pulled out, and supports a next exposed set of tissue paper by leaning against the next exposed set of tissue paper. In addition, a next sheet of tissue paper partially exposed from the take-out port following the tissue paper pulled out from the bundle is easily deformed into a shape having a high standing property because an edge portion thereof in the longitudinal direction is wound along an edge of the curved portion. In the opening perforation illustrated in the figure, falling of tissue paper into an internal space, which easily occurs in overlap packaging in which an exterior has a rectangular parallelepiped shape, hardly occurs.
Note that a cut tie ratio of the perforation forming the take-out port forming portion 5 can be appropriately determined depending on ease of breakage of a film to be used, but as a preferred example, a cut portion has a length of 0.8 mm or more and 5.0 mm or less, and a tie portion has a length of 0.3 mm or more and 5.0 mm or less. In addition, the take-out port forming portion 5 illustrated in
Specific examples of the flexible resin packaging film 4 constituting an exterior of the film-packaged tissue 1 include: a single-layer film of a polyethylene film, a polypropylene film, a polyester film, a polyethylene terephthalate film, a nylon film, a polyvinylidene chloride film, or an ethylene vinyl alcohol copolymer; a laminate film obtained by appropriately stacking these films; and a gas barrier film obtained by subjecting any of these films to a surface treatment such as aluminum vapor deposition. In addition, a biomass film derived from a plant raw material such as sugar cane, potato (starch), or corn can also be used. Use of such a biomass film is desirable from a viewpoint of environmental protection.
A polypropylene film and a polyethylene film are preferable from a viewpoint of cost. In addition, the packaging film 4 may be a satin film excellent in a design property and a hand feel property. Furthermore, in a case of packaging an odorous material such as scented tissue paper, an ethylene vinyl alcohol copolymer resin film and a polyethylene terephthalate resin film having an excellent aroma retaining property are desirable. The packaging film 4 may be a multilayer resin film in which a polyethylene resin film or a polypropylene resin film is stacked on one surface or both surfaces of an ethylene vinyl alcohol copolymer resin film or a polyethylene terephthalate resin film to improve thermal fusibility.
The thickness of the packaging film 4 only needs to be appropriately selected in consideration of flexibility, cost, gas permeability, and thermal fusibility at the time of packaging, but preferably, it is desirable that a thickness measured in conform with JIS P 8118 (1998) is 25 to 75 μm, and a softness measured based on a handle-o-meter method in conform with JIS L 1096 (2010) E method is 5.0 to 50.0 cN. With a thickness of 25 to 75 μm, the rigidity of the end surface 4A is sufficiently enhanced. In addition, with such a thickness and softness, the packaging film 4 is hardly broken, and is easily formed into a packaging film having an excellent tissue paper take-out property, particularly an excellent pop-up property. Note that the thickness is measured using a dial thickness gauge (thickness measuring instrument) “PEACOCK G-1A type” (manufactured by Ozaki MFG. Co. Ltd.) and its equivalent machine after a test piece is sufficiently subjected to humidity control under conditions of JIS P 8111 (1998).
In the film-packaged tissue assembly package 10 according to the present invention, the plurality of overlap-packaged film-packaged tissues 1 is gusset-packaged in the gusset packaging bag 13 such that the end surface 4A faces a top surface side having a grip portion and a bottom surface side facing the top surface side, and a longitudinal direction thereof is along a top-bottom direction.
The gusset packaging is a packaging mode containing a packaging object in a bag-shaped space between bonded portions 41 and 42 bonded by thermal fusion or the like on the top and bottom sides, and particularly having gusset portions 43 and 43 between the front surface and the back surface. For example, as illustrated in
The grip portion 45 is a surplus portion provided on the top surface side with respect to the top surface side sealing portion 41 serving as a top surface side boundary with a bag portion containing the film-packaged tissue 1 in order to enhance portability of the assembly package. In the illustrated mode, a finger hook hole 47 is formed. When the finger hook hole 47 is formed in the grip portion 45 in this manner, the portability of the assembly package is further enhanced.
In addition, in the assembly package 10 according to the present invention, it is desirable that a cut portion 70 for opening with a perforation or the like for facilitating opening is formed. Furthermore, it is desirable that the cut portion is provided in a range Z1 extending from a lower end of a portion where the finger hook hole 47 is formed in the top surface portion 44 extending from the front surface 46 or the back surface 46 to the grip portion 45 to the front surface 46 or the back surface 46. In the top surface portion 44, a force applied to the top surface portion 44 when a finger is hooked into the finger hook hole 47 and lifted varies depending on a position of the finger hook hole 47. Specifically, a pulling force in the region Z1 extending from the lower end of the portion where the finger hook hole 47 of the grip portion 45 is formed to the front surface 46 and the back surface 46 is smaller than that in a region extending from a lower end of a portion where the finger hook hole 47 is not formed to the front surface 26 and the back surface 26. In addition, the top surface portion 44 is a portion easily visible to a user.
Therefore, when the cut portion 70 is formed at such a position, the assembly package is not unintentionally opened at the time of carrying, and the cut portion 70 can be easily visually recognized. The shape of the cut portion is not particularly limited, but as in the illustrated example, it is desirable that the cut portion has a shape protruding toward the grip portion side, for example, a substantially arc shape. With this shape, a picking piece 70A is formed by pressing the cut portion 70 to tear a perforation or the like. When the picking piece 70A is pulled in a bottom surface direction, an opening port is easily formed on a front surface or a back surface of the gusset packaging bag as illustrated in
It is desirable that the gusset packaging film 14 is a polypropylene film or a polyethylene film from viewpoints of cost and an opening property. The film preferably has a melting point of 150° C. or lower. Note that a lower melting point of the packaging film makes a thermal fusion treatment possible at a lower temperature, and is more preferable in sealing and forming a grip portion. However, when the melting point is excessively low, the packaging film is more likely to be scratched or a hole is more likely to be formed in the packaging film particularly due to friction or the like with four corner portions 4t of the end surface 4A of the film-packaged tissue 1. Therefore, a substantial lower limit is 80° C. Examples of the polyethylene film include a linear low-density polyethylene film (LLDPE), a low-density polyethylene film (LDPE), and a medium-density polyethylene film (MDPE). Among these films, in the present invention, a linear low-density polyethylene film layer (LLDPE) having a density of 0.910 to 0.940 g/cm3 and a melting point of 110 to 120° C. is particularly suitable from viewpoints of thermal fusibility and cost. In addition, a single-layer film of a polyethylene terephthalate film, a nylon film, a polyvinylidene chloride film, or an ethylene vinyl alcohol copolymer, a laminate film obtained by appropriately stacking these films, or a gas barrier film obtained by subjecting any of these films to a surface treatment such as aluminum vapor deposition may be used. Similarly to the packaging film 4, a biomass film derived from a plant raw material such as sugar cane, potato (starch), or corn can also be used. It is also desirable to use a biomass film for the gusset packaging film from a viewpoint of environmental protection.
The thickness of the gusset packaging film 14 constituting the gusset packaging bag 13 is appropriately selected in consideration of a relationship with the contained film-packaged tissue 1 in addition to circumstances peculiar to gusset packaging, such as tearability that makes opening easy at the time of opening, abrasion resistance particularly to the four corner portions 4t of the end surface of the contained film-packaged tissue 1, and flexibility that prevents application of an excessive load to a finger when the gusset packaging bag 13 is carried with a finger through the finger hook hole formed in the grip portion in addition to flexibility, cost, and thermal fusibility at the time of packaging.
From such a point, as for the preferable thickness and softness of the gusset packaging film 14, a thickness measured in conform with JIS P 8118 (1998) is 10 to 65 μm, and a softness measured in conform with a handle-o-meter method in accordance with JIS L 1096 (2010) E method is 5.0 to 50.0 cN.
In particular, it is desirable that the softness of the gusset packaging film 14 constituting the gusset packaging bag 13 is lower than the softness of the packaging film 4 constituting the film-packaged tissue 1. In the gusset packaging bag 13 having the grip portion on the top surface side, when the grip portion 45 is held, the gusset packaging bag 13 is pulled in the top-bottom direction. Therefore, pressure may be applied to the film-packaged tissues 1, 1 . . . , which is a packaging object to be contained at this time. However, by lowering the softness of the gusset packaging film 14, the rectangular parallelepiped shape of the film-packaged tissue 1 to be contained is hardly deformed, fullness is hardly reduced without pressing the bundle 3 inside, and a take-out property such as a pop-up property is hardly deteriorated.
As an arrangement mode of the film-packaged tissues 1 in the gusset packaging bag 14, as in the illustrated mode, it is desirable that the plurality of film-packaged tissues 1, 1 . . . is arranged so as to form a substantially rectangular parallelepipedon as a whole such that the end surfaces 4A are substantially flush with each other and long side surfaces 4B are substantially flush with each other. When the film-packaged tissues 1, 1 . . . are arranged in a substantially rectangular parallelepipedon in this manner, stability and shape retention as a whole of the assembly are enhanced, and the assembly is hardly collapsed or crushed by an external force. In addition, when the film-packaged tissues 1 are arranged in this manner, the assembly of the film-packaged tissues 1 has a rectangular parallelepiped shape in which an end surface assembly surface having high rigidity is formed on each of a top surface and a bottom surface. Therefore, the film-packaged tissues 1 is less likely to be crushed or damaged by an external force particularly from the top-bottom direction is reduced. However, the arrangement of the film-packaged tissues 1 in the film-packaged tissue assembly package 10 according to the present invention is not limited to this mode.
Here, as described above, in the gusset packaging bag 13 having the grip portion 45 on a top surface side, when the grip portion 45 is held, the gusset packaging bag 13 is pulled in the top-bottom direction. Therefore, a contained packaging object and the gusset packaging film 14 may be rubbed against each other at this time. In the gusset packaging bag 13, a ridge line 14E between the gusset portion 43 and the front surface 46 and a ridge line 14E between the gusset portion 43 and the back surface 46, which are fold lines 14E when the gusset packaging bag 13 is a gusset tube as a precursor of the packaging bag, may be fragile. As illustrated in
Therefore, in a film-packaged tissue used as a stationary type having a larger mass as compared with a portable film-packaged tissue, for example, as illustrated in
In the assembly package according to the present invention, since the film-packaged tissues 1, 1 . . . are packaged such that each end surface 4A faces the top surface side where the grip portion 45 is formed and the bottom surface side facing the top surface side, and the longitudinal direction is along the top-bottom direction, such a risk is much smaller. In order to further reduce such a risk, it is desirable that as the number and the assembly mode of the film-packaged tissues 1 in the gusset packaging bag 13, the film-packaged tissues are arranged in two or less stages in the top-bottom direction. When the number of stages of the film-packaged tissues 1 exceeds two in the top-bottom direction, shape maintainability of the assembly package is deteriorated. Specifically, in the assembly package 10 according to the present invention, since the longitudinal direction of the film-packaged tissue 1 is a direction along the top-bottom direction, when the number of stages exceeds two and is three or more, a standing property in the top-bottom direction is deteriorated, a gap is easily generated between the stages, and rubbing between the gusset packaging film 14 and the film-packaged tissues 1 easily occurs. In addition, since the number of easily contacting portions between the four corner portions 4t of the end surfaces 4A of the film-packaged tissues 1 and the gusset packaging film 14 also increases, a risk of breakage of the gusset packaging film 14 increases. However, if at least the same number of film-packaged tissues 1 are packaged, the arrangement mode according to the present invention is superior to a mode in which film-packaged tissues 1 are stacked such that the end surfaces 4A face a direction orthogonal to the top-bottom direction like a reference embodiment.
The number of arrangement rows of the film-packaged tissues 1 in the direction orthogonal to the top-bottom direction is not particularly limited, but it is desirable that the number is six or less. As an example of a preferred mode, as illustrated in
Furthermore, in the film-packaged tissue assembly package 10 according to the present invention, it is desirable that the film-packaged tissues 1 each have a bundle filling ratio of 100% or more. Here, the bundle filling ratio is a ratio of the height of the bundle 3 taken out from the packaging film 4 to the height of the film-packaged tissue 1. In a specific measurement method, first, the film-packaged tissue 1 is subjected to humidity control for 24 hours under an environment of a standard state of 23° C.±1° C. and a humidity of 50±2% r.h according to JIS P 8111, and then placed on a horizontal table with an upper surface upward to measure the height of the film-packaged tissue 1. An average value of measured values obtained by measuring a distance L1 between sharp portions of the four corner portions 4t of the end surface 4A at four places is used. Next, the bundle 3 is taken out from the film-packaged tissue 1, subjected to humidity control for 24 hours under an environment of a standard state of 23° C.±1° C. and a humidity of 50±2% r.h according to JIS P 8111, and then placed on a horizontal table with an upper surface upward to measure the height of the bundle 3. An average value of measured values obtained by measuring a distance between the four corner portions of the short side surface 3A facing the end surface 4A at four places is used. Next, a ratio of the height of the bundle 3 taken out from the packaging film 4 to the height of the film-packaged tissue 1 is calculated from the measured values.
In such a film-packaged tissue 1 having a bundle filling ratio of more than 100%, the bundle 3 pushes the packaging film 4 from the inside. In the overlap packaging, the end surface 4A has high rigidity and is hardly stretched or deformed. On the other hand, portions facing upper and lower surfaces and a longitudinal side surface of the bundle 3 of the packaging film 4 have flexibility, and therefore these positions and a longitudinal edge 1E are deformed so as to slightly protrude. In a case where the film-packaged tissues 1 in which the longitudinal edge 1E protrudes in this manner are formed into assembly packaging toward the top surface side where the grip portion 45 is formed and the bottom surface side facing the top surface side such that the longitudinal direction is along the top-bottom direction, when the gusset packaging bag is pulled in the top-bottom direction by holding the grip portion 45, the four corner portions 4t of the end surface 4A hardly comes into contact with the gusset packaging film 14 constituting the gusset packaging bag 13 due to protrusion of the longitudinal edge 1E, and the gusset packaging bag 13 is less likely to be broken.
Furthermore, in the film-packaged tissue assembly package 10 according to the present invention, it is desirable that the film-packaged tissue assembly arranged in the gusset packaging bag has a compression ratio of 80% or more in a direction orthogonal to the top-bottom direction. Here, the compression ratio in the direction orthogonal to the top-bottom direction is (a distance between the gusset portions of the gusset packaging bag (a width of the front surface or the back surface)) L2 to (a length of the film-packaged tissue assembly in the direction orthogonal to the top-bottom direction when the film-packaged tissue assembly is not packaged) when packaging is performed such that the gusset portions 43 of the gusset packaging bag 14 face upper and lower surfaces 3C of the film-packaged tissue 1. The length of the film-packaged tissue assembly in the direction orthogonal to the top-bottom direction when the film-packaged tissue assembly is not packaged is calculated by (a height of one film-packaged tissue in an upper surface-lower surface direction)×(the number of rows in the direction orthogonal to the top-bottom direction). The height of one film-packaged tissue in the upper surface-lower surface direction is measured as follows unlike the height in the bundle filling ratio.
First, the individual film-packaged tissue 1 is taken out from the film-packaged tissue assembly package 10, and is subjected to humidity control for 24 hours under an environment of a standard state of 23° C.±1° C. and a humidity of 50±2% r.h according to JIS P 8111. Next, the film-packaged tissue 1 is placed on a horizontal table, and a hard acrylic plate having a size protruding in a range of 5 cm or less from each edge (short side edge and long side edge) of an upper surface of the bundle is placed on an upper surface of the bundle 3. When the size of the upper surface of the bundle is 160 to 200 mm in the longitudinal direction (width)×90 to 110 mm in the depth, the size of the acrylic plate only needs to be 250 mm×130 mm. The mass is 32 g or less. Next, the heights of four corners of the acrylic plate from the horizontal table are measured, and an average value thereof is calculated. This measurement is performed on all the film-packaged tissues which have been taken out. A further average value of the calculated average values is defined as the height of one film-packaged tissue 1 in the upper surface-lower surface direction. A value obtained by multiplying the calculated value by the number of rows is defined as “the length of the film packaging assembly in the direction orthogonal to the top-bottom direction when the film packaging assembly is not packaged”. Next, a distance between the gusset portions 43 of the gusset packaging bag 13 is measured. In the measurement, an average value of values obtained by measuring the width of the front surface 46 (between fold lines on the front surface) at three places and measuring the width of the back surface 46 (between fold lines on the back surface) at three places is used. Next, a ratio of a distance between the gusset portions (the width of the front surface or the back surface) of the gusset packaging bag 13 to the length in the direction orthogonal to the top-bottom direction when the film packaging assembly is not packaged is calculated.
When the compression ratio of the film-packaged tissue assembly arranged in the gusset packaging bag 13 in the direction orthogonal to the top-bottom direction exceeds 90%, the compression ratio is too high, and the end surface 4A is easily distorted, and the fullness of the tissue paper 2 is easily reduced. An upper limit of the compression ratio is not particularly limited in the packaging mode of the present invention. The film-packaged tissue only needs not to be excessively move in the gusset packaging bag. The compression ratio is not necessarily 100% or less. However, when the compression ratio is 100% or less, movement of the film-packaged tissue assembly is restrained by an exterior film constituting the gusset packaging bag, the exterior film is hardly broken, and furthermore, the assembly package is hardly collapsed, and the shape retention of the rectangular parallelepipedon is enhanced. Therefore, it is more desirable that the compression ratio is 100% or less.
On the other hand, each of sheets of the tissue paper 2 constituting the bundle 3 packaged in the film-packaged tissue 1 has a ply structure in which two or three thin sheets each having a crepe are stacked and formed into a set. This tissue paper 2 is a dry type, and not a so-called wet type impregnated with a liquid chemical. Therefore, the bundle 3 formed by the tissue paper 2 contains a large amount of air. Note that as the dry type tissue paper 2, there is also liquid chemical-imparting type tissue paper to which a liquid chemical such as a moisturizing component that increases moisture by moisture absorption, such as a polyol represented by glycerin, is applied, and such tissue paper is included in the dry type tissue paper 2. Rather, since such liquid chemical-imparting type tissue paper has a low restoring property when being compressed due to a high moisture content, the action and effect of the present invention with less reduction in fullness are more effectively exhibited. Note that the moisture content of the liquid chemical-imparting type tissue paper is about 10 to 14% by mass. The moisture content is a ratio of moisture contained in tissue paper in a standard state.
As a raw material pulp of thin sheets constituting the tissue paper 2, a pulp obtained by blending NBKP and LBKP is used. The raw material pulp may contain a used paper pulp, but preferably contains only NBKP and LBKP from a viewpoint of texture or the like. A blend ratio thereof is preferably NBKP:LBKP=20:80 to 80:20, and particularly preferably NBKP:LBKP=30:70 to 60:40.
A basis weight per thin sheet constituting each ply of the tissue paper 2 is 10 to 25 g/m2. The basis weight is preferably 12 to 18 g/m2. The basis weight here is measured by the measurement method of JIS P 8124 (1998). The paper thickness of the tissue paper 2 for two plies is 90 to 200 μm, and more preferably 90 to 140 μm. The paper thickness for three plies is 120 to 300 μm. The paper thickness here is a value obtained by sufficiently subjecting a test piece to humidity control under conditions of JIS P 8111 (1998), and then measuring the paper thickness in a state of a plurality of plies using a dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (manufactured by Ozaki MFG. Co. Ltd.) and its equivalent machine under the same conditions.
Tissue paper having the above basis weight and paper thickness sufficiently exhibits an effect thereof particularly without reducing fullness when the tissue paper is formed into an assembly package having a low compression ratio according to the present invention. Note that the top-bottom direction and the up-down direction in the present invention and the present specification are appropriately changed depending on the directions of the film-packaged tissue assembly package and the film-packaged tissue, and do not mean absolute directions.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2019-121773 | Jun 2019 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2020/024147 | 6/19/2020 | WO |
