The present invention relates to a sheet member container and a manufacturing method of a contents-containing sheet member container.
BACKGROUND ART
For example, Patent Document 1 describes a sheet member container having a structure in which a plurality of films are stacked and a filler such as air is contained between layers of the films. The sheet member container of Patent Document 1 includes a container including a containing portion that accommodates contents, a bag body that covers the container (described as a cover body in the same document), a bag-body forming sheet member 21 that constitutes the bag body (described as a cover body forming sheet member in the same document), and an extending piece extending from the container.
The bag-body forming sheet member includes an attached portion in which the plurality of film layers are attached together (described as a film region in the same document) and a non-attached region in which a plurality of film layers are partially not attached (described as a filler containing portion in the same document). The filler is contained between layers of the plurality of film layers in the non-attached region to form a filling portion, and the extending piece includes an inlet through which the filler is inputted into the filling portion.
In the sheet member container of Patent Document 1, the containing portion and an external space of the sheet member container communicate to each other at a base end of the extending piece.
Patent Document 1: Japanese Patent No. 6193535
The present invention relates to a sheet member container configured to include one or more sheet members including a bag-body forming sheet member including an outer film layer and an inner film layer that are stacked on each other, the sheet member container including: a container main body, an extending piece extending from the container main body, a containing portion that is formed continuously over an interior of the container main body and an interior of the extending piece, the containing portion storing contents, a filling port that communicates between a portion of the interior of the container main body in the containing portion and an external space of the sheet member container, and a bag body that is made out of the bag-body forming sheet member, the bag body surrounding the containing portion, in which the bag-body forming sheet member includes a bag-body sealing portion that is a portion in which the outer film layer and the inner film layer are attached together, and a non-attached region where the outer film layer and the inner film layer are partially not attached, the bag-body forming sheet member also including a filling portion that allows a filler to be contained between layers of the outer film layer and the inner film layer in the non-attached region, the extending piece includes an inlet through which the filler is inputted into the filling portion, the sheet member container includes a peripheral edge sealing portion in which the one or more sheet members are folded and in which peripheral edge portions of a sheet member of an innermost layer included in the one or more sheet members are attached to each other, the peripheral edge sealing portion defines the containing portion, the peripheral edge sealing portion has a portion disposed in a region outside the inlet in the extending piece, and the containing portion is sealed from the external space except for the filling port.
The present invention also relates to a method of manufacturing a contents-containing sheet member container, including a preparation step of preparing, as the sheet member container, the sheet member container of the present invention, a preliminary step of performing, for the containing portion, at least one of a degassing treatment, and a purging treatment using an inert gas, a contents filling step of filling the containing portion with the contents, and a filler filling step of putting the filler between layers of the outer film layer and the inner film layer in the non-attached region, the steps being performed in this order.
According to study by the present inventors, in a sheet member container described in Patent Document 1, there is room for improvement in terms of a structure that suppresses deterioration (degradation) of contents.
The present invention relates to a sheet member container that makes it possible to more reliably suppress the deterioration (degradation) of the contents, and a manufacturing method of a contents-containing sheet member container.
Below, preferred exemplary embodiments of the present invention will be described with reference to the drawings. Note that, in all the drawings, the same reference characters are attached to similar constituent components, and detailed explanation will not be repeated. Also,
The sheet member container 100 according to the present exemplary embodiment is a sheet member container configured to include one or more sheet members including a bag-body forming sheet member 21 including an outer film layer 22 and an inner film layer 23 that are stacked on each other. The sheet member container includes a container main body 20, the extending piece 25 extending from the container main body 20, a containing portion 17 that is formed continuously over an interior of the container main body 20 and an interior of the extending piece 25, the containing portion 17 storing contents, a filling port 15c that communicates between a portion of the interior of the container main body 20 in the containing portion 17 and an external space of the sheet member container 100, and a bag body 10 that is made out of the bag-body forming sheet member 21 and that surrounds the containing portion 17.
The bag-body forming sheet member 21 includes a bag-body sealing portion 26 that is a portion in which the outer film layer 22 and the inner film layer 23 are attached together, and a non-attached region 24 in which the outer film layer 22 and the inner film layer are partially not attached, and also includes a filling portion 60 that allows a filler to be contained between layers of the outer film layer 22 and the inner film layer 23 in the non-attached region 24.
The extending piece 25 includes an inlet 25a through which the filler is inputted into the filling portion 60.
The sheet member container 100 includes a peripheral edge sealing portion 42 in which the one or more sheet members are folded and in which peripheral edge portions of a sheet member of an innermost layer included in the one or more sheet members are attached to each other. The peripheral edge sealing portion 42 defines the containing portion 17, the peripheral edge sealing portion 42 has a portion disposed in a region outside the inlet 25a in the extending piece 25, and the containing portion 17 is sealed from the external space except for the filling port 15c.
When filling the containing portion 17 with contents 18, oxygen is suctioned from the containing portion 17 before the containing portion 17 is filled with the contents 18. This can suppress deterioration (degradation) of the contents 18 contained in the containing portion 17 due to contact with oxygen.
Here, according to the present exemplary embodiment, since the containing portion 17 is sealed from the external space except for the filling port 15c, the containing portion 17 can be sufficiently degassed by suctioning through the filling port 15c before the filler is contained in the filling portion 60. This can more reliably suppress the deterioration (degradation) of the contents 18 contained in the containing portion 17 due to contact with oxygen retained in the containing portion 17.
Furthermore, according to the present exemplary embodiment, the peripheral edge sealing portion 42 has a portion disposed in the region outside the inlet 25a in the extending piece 25, and the containing portion 17 is sealed from the external space except for the filling port 15c. Therefore, the containing portion 17 of the sheet member container 100 before the filler is contained in the filling portion 60 can be suitably filled with the contents 18 through the filling port 15c. Consequently, the contents 18 can be contained in the containing portion 17 while sufficiently expanding the containing portion. Therefore, the containing portion 17 can be smoothly filled with the contents 18.
In the present invention, types of contents 18 are not specifically limited. The contents 18 include, for example, shampoo, conditioner, body soap, detergent, bleach, softener, beverage, and food, and also include engine oil, chemical agent, and the like.
In addition, the contents 18 may be a liquid (including a form of paste or a form of foam), or may be a solid (for example, in a form of particles (including a form of grains) or in a form of powder).
In the case of this exemplary embodiment, the contents 18 are, for example, liquid.
In a case where the contents 18 are liquid, the viscosity of the contents 18 at, for example, 30° C. preferably falls in a range of equal to or more than 1 mPa·s and equal to or less than 120000 mPa·s (measured by a B-type viscometer (for example, viscometer TV-10 or viscometer TVB-10 made by Toki Sangyo Co., LTD. or the like)), and more preferably falls in a range of equal to or more than 1 mPa·s and equal to or less than 60000 mPa·s.
The filler contained in the filling portion 60 includes a fluid (gas or liquid), a solid (for example, a powder-granular material, resin pellets, or the like), or a semi-solid (for example, blowing agent or the like), and is preferably a compressible fluid such as air.
In this exemplary embodiment, the positional relationship (up-down relationship or the like) of each constituent component of the sheet member container 100 is described in terms of a positional relationship in a state where the sheet member container 100 is caused to stand independently as illustrated in
Additionally, in connection with the positional relationship of respective constituent components of the sheet member container 100, the positional relationship illustrated in each of the drawings may be described.
The front side (side toward a viewer of a paper surface in
In the case of this exemplary embodiment, the container main body 20 is formed into a bag shape and includes a body portion 11, a top portion 14 disposed on an upper side of the body portion 11, and a bottom portion 13 disposed on a lower side of the body portion 11. However, the present invention is not limited to this example, and the container main body 20 does not have to include the top portion 14 or does not have to include the bottom portion 13. As illustrated in
The container main body 20 surrounds the containing portion 17 (surrounds an after-mentioned inner bag 40 in the case of this exemplary embodiment). The container main body 20 constitutes a shell of the sheet member container 100. Below, the body portion 11, top portion 14 and bottom portion 13 of the container main body 20 may be referred to as the body portion 11, top portion 14 and bottom portion 13 of the sheet member container 100.
As illustrated in
The first main surface portion 20a is formed, for example, in left-right symmetry, and the second main surface portion 20b is also formed, for example, in left-right symmetry.
The container main body 20 is formed by folding a container forming sheet member 51 (see
Also, in the case of this exemplary embodiment, the extending piece 25 extends from an upper end of the container main body 20. More specifically, a portion of the extending piece 25 on the front side extends, for example, upward from an upper end of the second main surface portion 20b of the body portion 11. A portion of the extending piece 25 on the back side extends, for example, upward from an upper end of the top portion 14. In other words, the extending piece 25 extends from a boundary between the body portion 11 and the top portion 14.
A widthwise dimension of the extending piece 25 is, for example, substantially constant in an up-down direction. Alternatively, the widthwise dimension of the extending piece 25 may vary depending on a position in the up-down direction.
Further, in the case of this exemplary embodiment, the sheet member container 100 further includes the inner bag 40 disposed inside the bag body 10, and the inner bag 40 is made out of the inner-bag forming sheet member 41 that is a sheet member of the innermost layer included in the one or more sheet members that constitute the sheet member container 100. Therefore, in the case of this exemplary embodiment, the peripheral edge sealing portion 42 in which the peripheral edge portions of the sheet member of the innermost layer are attached to each other is a sealing portion in which the peripheral edge portions of the inner-bag forming sheet member 41 are attached to each other.
More specifically, the inner bag 40 is formed, for example, by attaching portions in the peripheral edge portions of the inner-bag forming sheet member 41 (see
The shape of the inner bag 40 is not specifically limited. However, in the case of this exemplary embodiment, the inner bag 40 is formed into a shape similar to that of the container main body 20. Alternatively, the shape of the inner bag 40 may be smaller than that of the container main body 20.
As illustrated in
The sheet member container 100 includes a spout member 15 including a discharge port that allows the contents 18 to be discharged from the containing portion 17, and the discharge port also serves as the filling port 15c.
More specifically, the spout member 15 is provided, for example, so as to penetrate through the top portion 14.
For example, as illustrated in
The plate portion 15b overhangs like a flange from a lower end of the outlet cylinder portion 15a to the periphery. A planar shape of the plate portion 15b is not specifically limited, and an example of the shape is a substantially square shape.
For example, on the inner-bag forming sheet member 41, the plate portion 15b is provided on an inner surface or an outer surface and at a portion of the body portion 11 disposed along the top portion 14. For example, the plate portion 15b is attached to the inner surface (lower surface) of the inner-bag forming sheet member 41 in the top portion 14. Consequently, the plate portion 15b is attached to the bag-body forming sheet member 21 through the inner-bag forming sheet member 41. However, the present invention is not limited to this example, and the plate portion 15b may be attached directly to the inner film layer 23 of the bag-body forming sheet member 21. An attached portion between the plate portion 15b and the inner-bag forming sheet member 41 circularly surrounds the periphery of the outlet cylinder portion 15a in planar view. The attached portion between the plate portion 15b and the inner-bag forming sheet member 41 is formed, for example, in a region that overlaps with the bag-body sealing portion 26 (see
An opening in the outlet cylinder portion 15a on an upper end side is a discharge port through which the contents 18 are discharged from the containing portion 17, the port also serving as the filling port 15c. Therefore, a portion of the interior of the container main body 20 in the containing portion 17 and the external space of the sheet member container 100 communicate to each other through the opening in the outlet cylinder portion 15a on the upper end side.
Also, in the plate portion 15b, an opening is formed coaxially with an inner space of the outlet cylinder portion 15a. The contents 18 in the containing portion 17 are discharged to outside through the opening in the plate portion 15b and the filling port 15c.
The shape of the filling portion 60 is not specifically limited. For example, as illustrated in
The first filling portion 61 is connected to the fourth filling portion 64, and also connected to the third filling portion 63. The second filling portion 62 is connected to the third filling portion 63.
The sheet member container 100 includes the filling portion 60 thus entirely formed in an integrated manner. In the state where the filling portion 60 is filled with the filler, structural strength is sufficiently obtained substantially over the whole container main body 20.
Alternatively, in the present invention, the sheet member container 100 may include a plurality of filling portions 60 that are independent of one another.
Further, in the case of this exemplary embodiment, the filling portion 60 includes a first extending filling portion 66 disposed on one side and a second extending filling portion 67 disposed on the other side with the containing portion 17 of the interior of the extending piece 25 being disposed between the extending filling portions in a thickness direction of the extending piece 25.
In the case of this exemplary embodiment, the first extending filling portion 66 and the fourth filling portion 64 are connected via an interfacial connecting portion 65a, and the second extending filling portion 67 and the second filling portion 62 are connected via an interfacial connecting portion 65b.
More specifically, a lower edge of the first extending filling portion 66 is connected to an upper edge of the fourth filling portion 64, and a lower edge of the second extending filling portion 67 is connected to an upper edge of the second filling portion 62.
Here, for example, the inlet 25a is formed in a portion of the outer film layer 22 that defines at least one of the first extending filling portion 66 and the second extending filling portion 67.
In the case of this exemplary embodiment, for example, as illustrated in
Alternatively, for example, in the outer film layer 22, the inlet 25a may be formed in the portion that defines the first extending filling portion 66, or may be formed in both of the portion that defines the first extending filling portion 66 and the portion that defines the second extending filling portion 67.
As illustrated in
In the case of this exemplary embodiment, the outer film layer 22 and the inner film layer 23 are formed into the same shape as each other. However, the present invention is not limited to this example, and the outer film layer 22 and the inner film layer 23 may have shapes different from each other. In the case of the different shapes, it is preferable that the outer film layer 22 has a shape larger than that of the inner film layer 23.
In the outer film layer 22 and the inner film layer 23, an insert hole is formed, into which the outlet cylinder portion 15a of the spout member 15 is inserted.
In the bag-body forming sheet member 21, the non-attached region 24 (see
The filling portion 60 is not necessarily formed in the whole non-attached region 24 and may be formed in some of a plurality of non-attached regions 24.
In
In
Further,
As for a method of attaching the outer film layer 22 and the inner film layer 23 together, as one example, heat sealing, ultrasonic sealing, attaching with adhesive, or the like may be used.
In the case of this exemplary embodiment, each of the outer film layer 22 and the inner film layer 23 has a layer structure including a plurality of resin layers. Also, the inner-bag forming sheet member 41 also has a layer structure including a plurality of resin layers.
The bag-body forming sheet member 21 and the inner-bag forming sheet member 41 preferably include one type of resin layer based on polyethylene, polypropylene, polyester, or polyamide.
A material of the resin layer is not specifically limited. For example, it is preferable from the viewpoint of recyclability that the material is any one of a polyethylene material such as high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), ultra-low density polyethylene (ULDPE), or ethylene-vinyl alcohol copolymer (EVOH); a polypropylene material such as stretched polypropylene (OPP), unstretched polypropylene (CPP), isotactic PP, syndiotactic PP, atactic PP, random PP, or block PP; a polyester material such as polyethylene terephthalate (PET), amorphous polyethylene terephthalate (amorphous PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), or polybutylene naphthalate (PBN); and a polyamide material such as stretched nylon (ONy), unstretched nylon (CNy), nylon 6, nylon 66, nylon 11, nylon 12, and MXD6. Among these materials, the above polyethylene material is particularly preferable.
As illustrated in
Here, a sealing portion of the peripheral edge portion of the container forming sheet member 51 is referred to as a peripheral edge sealing portion 52. The peripheral edge sealing portion 52 includes a sealing portion (hereinafter, an inner-outer sealing portion 43) between the peripheral edge portion of the inner film layer 23 and the peripheral edge portion of the inner-bag forming sheet member 41, and a sealing portion (hereinafter, a main-body peripheral edge sealing portion 28) between the peripheral edge portion of the outer film layer 22 and the peripheral edge portion of the inner film layer 23.
In
As for a method of forming the peripheral edge sealing portion 52, as one example, heat sealing, ultrasonic sealing, attaching with adhesive, or the like may be used.
As illustrated in
The insert hole 21a into which the outlet cylinder portion 15a of the spout member 15 is inserted is formed in the top forming sheet portion 39.
In the case of this exemplary embodiment, the non-attached region 24 is formed into a shape that corresponds to the shape of the filling portion 60 of the sheet member container 100.
Here, in the case of this exemplary embodiment, as illustrated in
The first extending portion 22a includes, for example, the outer film layer 22 and the inner film layer 23 and extends outward from the top forming sheet portion 39. The second extending portion 22b includes, for example, the outer film layer 22 and the inner film layer 23 and extends outward from the second sheet portion 32. The first extending portion 22a and the second extending portion 22b are formed, for example, into the same shape with the same dimension as each other. The planar shape of each of the first extending portion 22a and the second extending portion 22b is not specifically limited, and each extending portion is formed, for example, into a substantially rectangular shape that is long in one direction.
In a state where the bag-body forming sheet member 21 is developed (the state illustrated in
Further, in the case of this exemplary embodiment, the inner-bag forming sheet member 41 includes a third extending portion 46a disposed on one side and a fourth extending portion 46b disposed on the other side with the containing portion 17 of the interior of the extending piece 25 being disposed between the extending portions in the thickness direction of the extending piece 25.
More specifically, the inner-bag forming sheet member 41 is formed into the same shape as that of the bag-body forming sheet member 21. The third extending portion 46a is a portion that corresponds to the first extending portion 22a (portion that overlaps with the first extending portion 22a). The fourth extending portion 46b is a portion that corresponds to the second extending portion 22b (portion that overlaps with the second extending portion 22b). Then, the extending piece 25 is formed by attaching respective peripheral edge portions of the first extending portion 22a to the fourth extending portion 46b to each other. Further specifically, the respective peripheral edge portions of the first extending portion 22a and the third extending portion 46a are attached to each other, the respective peripheral edge portions of the second extending portion 22b and the fourth extending portion 46b are attached to each other, and the respective peripheral edge portions of the third extending portion 46a and the fourth extending portion 46b are also attached to each other.
In addition,
In the case of this exemplary embodiment, a position of the seal boundary line 41a and a position of the seal boundary line 21c correspond to each other (overlap with each other).
In a portion of the inner-bag forming sheet member 41 that overlaps with the top forming sheet portion 39, an insert hole 41b is formed, into which the outlet cylinder portion 15a of the spout member 15 is inserted.
The plate portion 15b of the spout member 15 is attached, for example, to an inner surface of the portion of the inner-bag forming sheet member 41 that overlaps with the top forming sheet portion 39. The outlet cylinder portion 15a protrudes to an outer surface side of a sheet through the insert hole 41b of the inner-bag forming sheet member 41 and the insert hole 21a of the top forming sheet portion 39.
Here, in the case of this exemplary embodiment, the sheet member container 100 includes a valve part 90 mounted to the filling port 15c (see
More specifically, the valve part 90 includes an operating portion 92, a holding portion 93 that holds the operating portion 92 slidably in the up-down direction, and a spring member 97 that biases the operating portion 92 upward.
In the case of this exemplary embodiment, the holding portion 93 is, for example, detachably mounted to the outlet cylinder portion 15a of the spout member 15.
The holding portion 93 includes a first member 94 that is a cylindrical portion having an internal thread shape and detachably screwed into the outlet cylinder portion 15a of the spout member 15, and a second member 95 supporting the spring member 97.
The first member 94 is formed, for example, into a cylindrical shape in which the up-down direction is the axial direction. Each of an inner diameter and an outer diameter of the first member 94 reduces in three stages as being upward.
Furthermore, the first member 94 includes a protrusion 941 configured to close a second inflow portion 961b of an after-mentioned piston member 96b. The protrusion 941 closes the second inflow portion 961b in a state where the piston member 96b is pressed downward.
The second member 95 is formed, for example, into a substantially cylindrical shape in which the up-down direction is the axial direction.
The second member 95 fits, for example, into a lumen of the first member 94. Also, a lower end of the spring member 97 is inserted into a lumen in a lower end of the second member 95.
The second member 95 includes, for example, an inflow portion 95a that communicates between the containing portion 17 and an internal space of the second member 95.
The operating portion 92 includes the piston member 96b inserted into the lumen of the first member 94 and the lumen of the second member 95, and a lumen of the piston member 96b constitutes an internal flow path 961a.
Also, the second inflow portion 961b is formed in a lower end of the piston member 96b. In a state where the second inflow portion 961b and the protrusion 941 of the first member 94 are in contact with each other, the internal flow path 961a and the internal space of the second member 95 are isolated from each other, and in a state where the second inflow portion 961b and the protrusion 941 of the first member 94 are separated from each other, the internal flow path 961a and the internal space of the second member 95 communicate to each other.
The lower end of the piston member 96b is mounted to an upper end of the spring member 97. More specifically, for example, the spring member 97 supports the piston member 96b and biases the piston member 96b upward. When the piston member 96b is pressed downward, the piston member 96b lowers against a biasing force of the spring member 97, and when the operation of pressing the piston member 96b is canceled, the piston member 96b rises according to the biasing force of the spring member 97.
In the case of this exemplary embodiment, an operation of pushing the piston member 96b toward a body portion 11 side can switch the valve part 90 to the opened state where the containing portion 17 communicates to the external space through the filling port 15c.
More specifically, when the operation of pressing the piston member 96b is performed, the piston member 96b lowers toward a bottom dead center (position of the piston member 96b illustrated in
When the second inflow portion 961b of the piston member 96b is pressed to be lower than the protrusion 941 of the first member 94 by the operation of pressing the piston member 96b, the internal space of the second member 95 and the internal flow path 961a communicate to each other, and the containing portion 17 and the external space further communicate to each other. That is, in the case of this exemplary embodiment, an operation of opening the operating portion 92 is a pressing operation of lowering the second inflow portion 961b of the piston member 96b to a bottom dead center side below the protrusion 941 of the first member 94.
Further, canceling of the pressing operation of the piston member 96b can switch the valve part 90 to the closed state where the containing portion 17 and the external space are isolated from each other.
More specifically, the rising of the piston member 96b brings the state where the second inflow portion 961b of the piston member 96b and the protrusion 941 of the first member 94 are in contact with each other, the internal space of the second member 95 and the internal flow path 961a are isolated from each other, and the containing portion 17 and the external space are further isolated from each other. That is, in the case of this exemplary embodiment, an operation of closing the operating portion 92 is the canceling of the pressing operation. The closing operation raises the second inflow portion 961b of the piston member 96b to a top dead center side above the protrusion 941 of the first member 94.
Below, a method of manufacturing a contents-containing sheet member container 300 according to the present exemplary embodiment (hereinafter referred to also as the present method) will be described with reference to
First, the above described sheet member container 100 is prepared. More specifically, the peripheral edge portions of the container forming sheet member 51 (inner-bag forming sheet members 41) are attached to each other, in a state where a folding line 81, a folding line 82 and a folding line 84, illustrated in
That is, the peripheral edge portions of the inner-bag forming sheet member 41 are attached to each other to form the peripheral edge sealing portion 42. Thus, using the inner-bag forming sheet member 41, the inner bag 40 is formed. This forms the container main body 20 having the bag shape that covers the inner bag 40.
In this way, as illustrated in
As for a method of attaching the inner-bag forming sheet members 41 to each other, as one example, heat sealing, ultrasonic sealing, attaching with adhesive, or the like may be used.
In the case of this exemplary embodiment, the main-body peripheral edge sealing portion 28, the peripheral edge sealing portion 42 and the inner-outer sealing portion 43 are arranged at positions that correspond to one another (positions that overlap with one another). The main-body peripheral edge sealing portion 28, the peripheral edge sealing portion 42 and the inner-outer sealing portion 43 are collectively referred to as a peripheral edge sealing portion 19 (the peripheral edge sealing portion 19 includes the main-body peripheral edge sealing portion 28, the peripheral edge sealing portion 42 and the inner-outer sealing portion 43).
In
In the first sheet portion 31, a portion closer to a side of the top forming sheet portion 39 than the folding line 85 is a first overlap portion 31a. The first overlap portion 31a is disposed to overlap with one half of the top forming sheet portion 39 in a state before the non-attached region 24 is filled with the filler.
In the second sheet portion 32, a portion located farther from a side of the bottom forming sheet portion 38 than a folding line 86 is a second overlap portion 32a. The second overlap portion 32a is disposed to overlap with the other half of the top forming sheet portion 39 in the state before the non-attached region 24 is filled with the filler.
Here, in the case of this exemplary embodiment, as illustrated in
Thereby, a dimension of the extending piece 25 can be set smaller than that in a case where the peripheral edge sealing portion 42 and the bag-body sealing portion 26 are formed at different positions in the extending piece 25.
More specifically, in the extending piece 25, each of the peripheral edge sealing portion 42 and the bag-body sealing portion 26 is formed continuously along a peripheral edge portion of the extending piece 25.
A portion of the peripheral edge sealing portion 42 on a front side of the extending piece 25 is connected to a portion of the peripheral edge sealing portion 42 in the top forming sheet portion 39. The peripheral edge sealing portion 42 on the front side of the extending piece 25 is formed avoiding the interfacial connecting portion 65a. Similarly, a portion of the peripheral edge sealing portion 42 on a back side of the extending piece 25 is connected to a portion of the peripheral edge sealing portion 42 in the second sheet portion 32. The peripheral edge sealing portion 42 on the back side of the extending piece 25 is formed avoiding the interfacial connecting portion 65b.
A portion of the bag-body sealing portion 26 on the front side of the extending piece 25 is connected to a portion of the bag-body sealing portion 26 in the top forming sheet portion 39. The bag-body sealing portion 26 on the front side of the extending piece 25 is formed avoiding the interfacial connecting portion 65a. Similarly, a portion of the bag-body sealing portion 26 on the back side of the extending piece 25 is connected to a portion of the bag-body sealing portion 26 in the second sheet portion 32. The bag-body sealing portion 26 on the back side of the extending piece 25 is formed avoiding the interfacial connecting portion 65b.
Subsequently, the above valve part 90 is mounted to the spout member 15 of the sheet member container 100 formed into the bag shape. Thereby, the sheet member container 100 including the valve part 90 mounted to the filling port 15c can be prepared, in which the valve part 90 can be switched to the opened state where the containing portion 17 communicates to the external space through the filling port 15c, and to the closed state where the containing portion 17 and the external space are isolated from each other.
Next, a preliminary step of performing, for the containing portion 17, at least one of a degassing treatment, and a purging treatment using an inert gas is performed.
In the case of this exemplary embodiment, in the preliminary step, for the containing portion 17, the purging treatment and the degassing treatment are performed at least once in this order. More specifically, in the preliminary step, for example, a degassing treatment, a purging treatment and another (second) degassing treatment are performed in this order.
As illustrated in
More specifically, a tube member 210 is inserted into the piston member 96b, and the tube member 210 is relatively lowered to the spout member 15 until the second inflow portion 961b and the protrusion 941 of the first member 94 are separated from each other. Thereby, a lumen of the tube member 210 and the containing portion 17 mutually conduct. In this state, oxygen retained in the containing portion 17 is suctioned (degassed) through the tube member 210. Thereby, as illustrated in
Subsequently, the purging treatment is performed. First, the valve part 90 is switched to the opened state in the same manner as when executing the degassing treatment. In this state, the containing portion 17 is filled with an inert gas (for example, nitrogen) through the tube member 210. When the filling with the inert gas is started, the inert gas flows through the lumen of the tube member 210 and into the containing portion 17 through the filling port 15c. Thereby, as illustrated in
After stopping the filling with the inert gas, the degassing treatment is performed again by suctioning a gas containing the inert gas contained in the interior of the containing portion 17 through the tube member 210. Thereby, as illustrated in
Thus, in the case of this exemplary embodiment, the preliminary step is performed before performing a filler filling step of filling the filling portion 60 with the filler. That is, the preliminary step is performed before structural strength of the container main body 20 is obtained by the filling portion 60 filled with the filler.
Therefore, when performing the purging treatment, the inert gas can be distributed to a region adjacent to the filling portion 60 in the containing portion 17. Therefore, the oxygen retained in the containing portion 17 can be diluted by the inert gas, and hence deterioration (degradation) of the contents 18 can be suppressed.
Further, when performing the degassing treatment, the containing portion 17 can be sufficiently collapsed, and hence oxygen can be suctioned more reliably from the containing portion 17.
Additionally, in the preliminary step, for example, either one of the degassing treatment or the purging treatment does not have to be performed. However, when performing the purging treatment, it is preferable to perform the degassing treatment after the purging treatment.
Next, a contents filling step of filling the containing portion 17 with the contents 18 is performed. In the contents filling step, the filling with the contents 18 is started from a state where the containing portion 17 is collapsed by the degassing treatment. When filling with the contents 18, the contents filling step is performed in a state where the valve part 90 is opened in the same manner as in the purging treatment and the degassing treatment. At this time, a tube member inserted into the piston member 96b may be the same as the tube member 210 used in the degassing treatment and the purging treatment, or may be a separate member. In a state where the tube member is inserted into the piston member 96b and the second inflow portion 961b and the protrusion 941 of the first member 94 are separated from each other, the contents 18 are inputted into the containing portion 17 through the tube member. Thereby, as illustrated in
After filling the containing portion 17 with a desired amount of contents 18, the tube member is raised relative to the spout member 15 and the tube member is removed from the valve part 90. Thereby, as illustrated in
Next, the filler filling step of putting the filler between the layers of the outer film layer 22 and the inner film layer 23 in the non-attached region 24 is performed.
The filler is inputted into the non-attached region 24 through the inlet 25a formed in the extending piece 25.
As illustrated in
A lower surface of the jig member 251 is, for example, in contact with the first extending filling portion 66, and an upper surface of the filling nozzle 252 is opposed to the second extending filling portion 67. A lumen of the filling nozzle 252 constitutes an internal flow path 253 through which the filler flows, and in the up-down direction, the inlet 25a and an opening in the filling nozzle 252 on a tip side are opposed to each other. Further, for example, an annular silicon ring (not shown in the drawings) is provided at a tip of the filling nozzle 252.
Here, in the case of this exemplary embodiment, the extending piece 25 includes portions of the inner-bag forming sheet member 41 (the third extending portion 46a and the fourth extending portion 46b). Thereby, rigidity of the extending piece 25 can be sufficiently obtained, which makes it easy to dispose the extending piece 25 so that the lower surface of the jig member 251 abuts on the first extending filling portion 66.
The filler is injected through an opening in the internal flow path 253 of the filling nozzle 252 on the tip side and further sprayed into the inlet 25a to fill the filling portion 60. More particularly, the filler sprayed into the inlet 25a flows through the second extending filling portion 67, the second filling portion 62, the third filling portion 63, the first filling portion 61, and the fourth filling portion 64 in this order, to flow into the first extending filling portion 66. At this time, the extending piece 25 is displaced upward by spraying the filler, which is regulated by the jig member 251.
As the filling portion 60 is filled with the filler, the first extending filling portion 66 and the second extending filling portion 67 expand, and as illustrated in
Here, during the filling of the filling portion 60 with the filler, in a tip 25b of the extending piece 25, each of the first extending filling portion 66 and the second extending filling portion 67 has a thickness dimension gradually increasing toward a base end side of the extending piece 25, and in a base end 25c of the extending piece 25 that is located closer to the base end side than the tip, each of the first extending filling portion 66 and the second extending filling portion 67 has a thickness dimension substantially constant. Then, the inlet 25a is formed, for example, in the base end 25c.
In the case of this exemplary embodiment, the thickness dimension of each of the first extending filling portion 66 and the second extending filling portion 67 herein is a separation distance between the outer film layer 22 and the inner film layer 23 in the thickness direction of the extending piece 25.
Thereby, during the filling of the filling portion 60 with the filler, the inlet 25a is formed in a portion in which the outer film layer 22 and the inner film layer 23 are sufficiently separated from each other in the extending piece 25, and hence the filling portion 60 can be smoothly filled with the filler.
Furthermore, as described above, in the case of this exemplary embodiment, the inlet 25a is disposed at a central position of the outer film layer 22 in the width direction of the second extending filling portion 67.
Thereby, the inlet 25a is located in a central portion of expansion in the second extending filling portion 67 during the filling of the filling portion 60 with the filler. Therefore, the filling portion 60 can be more smoothly filled with the filler.
In addition, a pressure inside the filling portion 60 is not particularly limited, but is preferably higher than atmospheric pressure, and may be, for example, equal to or more than 10 kPa and equal to or less than 500 kPa (gauge pressure).
Also, in the filler filling step, after filling, with the filler, a space between the outer film layer 22 and the inner film layer 23 in the non-attached region 24, the outer film layer 22 and the inner film layer 23 are attached together to form a filling portion sealing seal 29a that seals the filling portion 60. At the same time and the same location as in the filling portion sealing seal 29a, sheet members of an innermost layer are attached to each other to form a containing portion sealing seal 29b. Additionally,
Thereby, the filling portion 60 filled with the filler is sealed, and the containing portion 17 is sealed except for the filling port 15c.
More specifically, in the case of this exemplary embodiment, the filling portion sealing seal 29a is formed in the interfacial connecting portions 65a and 65b. Therefore, with the filling portion sealing seal 29a, the outer film layer 22 and the inner film layer 23 in the interfacial connecting portion 65a are attached to each other, and the outer film layer 22 and the inner film layer 23 in the interfacial connecting portion 65b are attached to each other. Therefore, with the filling portion sealing seal 29a, a communicating portion (interfacial connecting portion 65a) between the first extending filling portion 66 and the fourth filling portion 64 is closed, and a communicating portion (interfacial connecting portion 65b) between the second extending filling portion 67 and the second filling portion 62 is closed.
Similarly, the containing portion sealing seal 29b is formed in the interfacial connecting portions 65a and 65b. Therefore, with the containing portion sealing seal 29b, the inner-bag forming sheet members 41 in the interfacial connecting portion 65a are attached to each other, and the inner-bag forming sheet members 41 in the interfacial connecting portion 65b are attached to each other.
Subsequently, in the case of this exemplary embodiment, after the filler filling step of filling with the filler, a step of cutting off the extending piece 25 is performed. More specifically, for example, at the base end of the extending piece 25, the extending piece 25 is cut off from the container main body 20, and most of the filling portion sealing seal 29a and the containing portion sealing seal 29b is retained in the container main body 20. Remaining portions in the filling portion sealing seal 29a and the containing portion sealing seal 29b are cut off together with the extending piece 25 from the container main body 20. Alternatively, for example, the extending piece 25 may be cut off in the vicinity of each of the filling portion sealing seal 29a and the containing portion sealing seal 29b, and each of the filling portion sealing seal 29a and the containing portion sealing seal 29b may be entirely retained in the container main body 20.
Thus, the contents-containing sheet member container 300 can be obtained in which the filling portion 60 is filled with the filler (see
Thus, the manufacturing method of the sheet member container 300 according to the present exemplary embodiment is a method of manufacturing the contents-containing sheet member container 300, and includes the preparation step of preparing the above sheet member container 100 as the sheet member container, the preliminary step of performing, for the containing portion 17, at least one of the degassing treatment, and the purging treatment using the inert gas, the contents filling step of filling the containing portion 17 with the contents 18, and the filler filling step of filling, with the filler, the space between the outer film layer 22 and the inner film layer 23 in the non-attached region 24, the steps being performed in this order.
Here, the contents-containing sheet member container 300 may further include, for example, a cap part 70 (see
Alternatively, in and after the filler filling step, the valve part 90 may remain mounted to the spout member 15 and a pump portion (not shown in the drawings) may be attached to the valve part 90. In this case, when the piston member 96b is pushed (pressed downward) to the body portion 11 side, the contents 18 are discharged through the discharge port by action of the pump portion.
Next, Modification 1, Modification 2, Modification 3 and Modification 4 of the exemplary embodiment will be described with reference to
In Modification 1, as illustrated in
With this configuration, for example, when the bag-body sealing portion 26 and the peripheral edge sealing portion 42 are each formed by heat sealing, the forming of the peripheral edge sealing portion 42 can inhibit a portion of the extending piece 25 that does not overlap with a region where the bag-body sealing portion 26 is formed from being reheated. That is, heat history can be reduced, and hence strength of the bag-body sealing portion 26 in the extending piece 25 can be obtained.
Further, when viewed in the thickness direction of the extending piece 25, the portion of the extending piece 25 on the inner edge side of the peripheral edge sealing portion 42 and the portion of the extending piece 25 on the outer edge side of the bag-body sealing portion 26 overlap with each other, and hence a dimension of the extending piece 25 can be set smaller.
In Modification 2, as illustrated in
With this configuration, when the bag-body sealing portion 26 and the peripheral edge sealing portion 42 are each formed by heat sealing, the forming of the peripheral edge sealing portion 42 can inhibit a substantially entire region where the bag-body sealing portion 26 is formed in the extending piece 25 from being reheated. Therefore, heat history can be further reduced, and hence strength of the bag-body sealing portion 26 in the extending piece 25 can be sufficiently obtained.
In Modification 3, in an example illustrated in
With this configuration, when the bag-body sealing portion 26 and the peripheral edge sealing portion 42 are each formed by heat sealing, the forming of the peripheral edge sealing portion 42 can more reliably inhibit an entire region where the bag-body sealing portion 26 is formed in the extending piece 25 from being reheated. Therefore, heat history can be further reduced, and hence strength of the bag-body sealing portion 26 in the extending piece 25 can be sufficiently obtained.
In Modification 4, as illustrated in
Also, according to Modifications 1 to 4 described above, a containing portion 17 is sealed from an external space except for a filling port 15c, and hence the containing portion 17 can be sufficiently degassed by suctioning through the filling port 15c before putting the filler into a filling portion 60. This can more reliably inhibit the contents 18 contained in the containing portion 17 from being deteriorated (degraded) due to contact with oxygen retained in the containing portion 17.
Next, Modification 5 of the exemplary embodiment will be described with reference to
In the case of this modification, as illustrated in
With this configuration, when forming the containing portion sealing seal 29b, the contents 18 can be inhibited from being interposed between layers of innermost layer sheet members (inner-bag forming sheet members 41) in the region where the containing portion sealing seal 29b is formed in the extending piece 25. Therefore, in the region where the containing portion sealing seal 29b is formed in the extending piece 25, the inner-bag forming sheet members 41 can be more reliably attached to each other, so that the containing portion 17 can be suitably sealed.
Further, in the case of this modification, the extending piece 25 extends from an upper end of a container main body 20 in the same manner as in the exemplary embodiment.
For this reason, it is easy to maintain a state where the sheet member container 100 is tilted so that the liquid level of the contents 18 is the position lower than the containing portion sealing seal 29b. Therefore, when forming the containing portion sealing seal 29b, the contents 18 can be more reliably inhibited from being interposed between the layers of the innermost layer sheet members (inner-bag forming sheet members 41) in the region where the containing portion sealing seal 29b is formed in the extending piece 25.
In addition, various constituent components of the sheet member container 100 and the contents-containing sheet member container 300 do not have to exist independently of one another, and it is allowed that a plurality of constituent components are formed as one member, one constituent component is formed of a plurality of members, a constituent component is a part of another constituent component, a part of a constituent component overlaps with a part of another constituent component, or the like.
Further, for example, in each of the above exemplary embodiments, an example where the sheet member container 100 (or the contents-containing sheet member container 300) includes the inner bag 40 has been described, but the present invention is not limited to this example, and the sheet member container 100 (or the contents-containing sheet member container 300) does not have to include the inner bag 40. When the sheet member container 100 (or the contents-containing sheet member container 300) does not include the inner bag 40, the containing portion 17 is configured by the container main body 20. That is, in the peripheral edge sealing portion 42, portions of the inner film layer 23 of the bag-body forming sheet member 21 are attached to each other to form the container main body 20 and also constitute the containing portion 17.
Even when manufacturing the sheet member container 300 that does not include the inner bag 40, a manufacturing method is the same as in the above exemplary embodiment.
Filing Document | Filing Date | Country | Kind |
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PCT/JP2021/016664 | 4/26/2021 | WO |