JP7491111B2 - Pouches and How to Use Them - Google Patents

Description

The present invention relates to a pouch equipped with an opening and closing mechanism, and in particular to a pouch that is designed to ensure airtightness when unopened and to easily expel air after opening.

Conventionally, pouches equipped with an opening and closing mechanism called a zipper that allows a pouch to be resealed once it has been opened have been widely used. The opening and closing mechanism called a zipper is capable of opening and closing the opening by fitting a male member and a female member together. By using such an opening and closing mechanism, it is possible to add additional ingredients or seasonings to a sealed pouch after it has been opened and then reseal it.

A problem with pouches equipped with such an opening and closing mechanism is that it is difficult to remove the air from inside the pouch after resealing, making it difficult to store the pouch compactly. To solve this problem, a technology has been proposed in which an air removal valve is provided in the body of the pouch (see Patent Document 1), and a technology has been proposed in which cutting is made in the zipper tape and packaging film to remove the air (see Patent Document 2).

Patent Publication No. 2720492 Japanese Patent Application Laid-Open No. 11-137311

However, the technology described in Patent Document 1 requires the installation of a special gas vent valve, and is difficult to manufacture using simple bag-making equipment, resulting in problems with cost and processability. Furthermore, the technology described in Patent Document 2 has the problem that the sealing ability of the bag when unopened is compromised by cutting slits in the film and zipper.

The present invention aims to provide a pouch that can be produced using a simple bag-making device and that can guarantee airtightness when unopened, as well as a method for using the pouch.

In order to solve the above problems, the present invention provides
A pouch having a container between a first surface film and a second surface film,
A first edge portion;
a second edge portion opposite the first edge portion;
a third edge and a fourth edge extending between the first edge and the second edge;
a first edge seal formed along the first edge;
an opening/closing mechanism formed between the first edge portion and the second edge portion and closer to the first edge portion;
a cylindrical member sandwiched between the first surface film or the second surface film and the opening/closing mechanism,
an end portion of the tubular member on the first edge side is located on the second edge side with respect to an inner edge of the first edge seal portion,
The tubular member provides a pouch in which the length of the portion protruding from the end of the opening/closing mechanism on the first edge side toward the first edge side in a planar view is longer than the length of the portion protruding from the end of the opening/closing mechanism on the second edge side toward the second edge side.

The pouch of the present invention further comprises:
The length of the tubular member protruding from the end of the opening/closing mechanism on the first edge side toward the first edge side when viewed in a planar view may be more than twice the length of the portion protruding from the end of the opening/closing mechanism on the second edge side toward the second edge side.

The pouch of the present invention further comprises:
The distance between the inner edges of the third edge seal portion formed along the third edge and the fourth edge seal portion formed along the fourth edge may be five times or more the width of the tubular member in the direction connecting the third edge and the fourth edge.

The pouch of the present invention further comprises:
An end portion of the tubular member on the first edge side may be located closer to the second edge side than a planned opening position extending in a direction connecting the third edge and the fourth edge.

The tubular member may be formed at a position that does not overlap with the third edge seal portion formed along the third edge portion and the fourth edge seal portion formed along the fourth edge portion.

The tubular member may be formed to overlap a line equidistant from the inner edge of the third edge seal portion and the inner edge of the fourth edge seal portion.

The present invention also provides a method for producing a method for manufacturing a semiconductor device comprising the steps of:
A storage portion is provided between the first surface film and the second surface film,
a first edge portion, a second edge portion opposite the first edge portion, a third edge portion and a fourth edge portion extending between the first edge portion and the second edge portion, a first edge seal portion formed along the first edge portion, an opening and closing mechanism formed between the first edge portion and the second edge portion and closer to the first edge portion, and one of the first surface film and the second surface film, and a tubular member sandwiched between the opening and closing mechanism,
a first edge side end of the tubular member is located closer to the second edge side than an inner edge of the first edge seal portion, and a length of a portion of the tubular member protruding from the first edge side end of the opening/closing mechanism toward the first edge side in a plan view is longer than a length of a portion of the opening/closing mechanism protruding from the second edge side end of the opening/closing mechanism toward the second edge side,
a cut is made at a position closer to the second edge than the first edge seal portion, and the first edge side is unsealed to form an opening;
After removing the contents, the opening and closing mechanism is closed to reseal the pouch;
To provide a method of using the pouch, which involves storing the pouch containing the remaining contents.

The present invention provides a pouch that can be produced using a simple bag-making device and a method for using the pouch, while ensuring airtightness when unopened.

FIG. 1 is a front view of a pouch according to an embodiment of the present invention. FIG. 2 is a rear view of a pouch according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional view of a pouch according to one embodiment of the present invention. 1 is a cross-sectional view of a tubular member used in a pouch according to one embodiment of the present invention. FIG. 2 is a front view of the pouch in a sealed state. FIG. 2 is a front view of the pouch after opening. FIG. 13 is a front view showing a modified example of the pouch.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
Fig. 1 is a front view showing a pouch according to an embodiment of the present invention. Fig. 2 is a rear view showing a pouch according to an embodiment of the present invention. Fig. 3 is a partial cross-sectional view of a pouch according to an embodiment of the present invention. The pouch according to the present embodiment shown in Figs. 1 and 2 shows a pouch in a state before being filled with a content (a state in which no content is filled).

1 and 2, the pouch of this embodiment is rectangular in plan view, and includes a first edge 4 and a second edge 5 that face each other, and a third edge 6 and a fourth edge 7 that extend between the first edge 4 and the second edge 5. Here, the term "rectangle" refers not only to a rectangle with four right-angled corners, but also to a shape that is considered to be approximately rectangular, such as a rectangle with four chamfered corners that are convex outwardly. The pouch shown in FIG. 1 and FIG. 2 is rectangular with four right-angled corners, but may be, for example, a rectangle with four chamfered corners that are convex outwardly. In this specification, the term "pouch" is not limited to a pouch that is not filled with contents, but also includes a pouch that is filled with contents. Furthermore, the term "pouch" is also intended to include a pouch in which a seal portion that seals the opening is formed after the contents are filled, and a pouch in which the opening for filling is not sealed before filling.

The pouch of this embodiment is mainly composed of four components: a first surface film 1 having a substantially rectangular shape, a second surface film 2 having the same shape as the first surface film 1, a fitting 20 that serves as an opening and closing mechanism, and a tubular member 30 fixed between the fitting 20 and the first surface film 1. The pouch of this embodiment is formed by joining the above-mentioned components at predetermined locations by heat sealing (thermal fusion) or the like.

<Each seal part>
As shown in Fig. 1, the pouch of this embodiment comprises a first edge sealed portion 14, a third edge sealed portion 16, and a fourth edge sealed portion 17, and the second edge 5 side is left unsealed and has an opening for filling the contents. In Fig. 1, each sealed portion is indicated by diagonal hatching.

The first edge seal portion 14, the third edge seal portion 16, and the fourth edge seal portion 17 are formed by sealing and joining the first surface film 1 and the second surface film 2. The first edge seal portion 14 is formed along the first edge portion 4 so as to include the first edge portion 4 (the upper end in Figs. 1 and 2). The third edge seal portion 16 is formed along the third edge portion 6 so as to include the third edge portion 6 (the left end in Fig. 1, the right end in Fig. 2). The fourth edge seal portion 17 is formed along the fourth edge portion 7 so as to include the fourth edge portion 7 (the right end in Fig. 1, the left end in Fig. 2). The seal width of the first edge seal portion 14 is preferably, for example, 5 mm or more and 15 mm or less. The seal width of the third edge seal portion 16 and the fourth edge seal portion 17 is preferably, for example, 5 mm or more and 15 mm or less. The seal width is the width in a direction perpendicular to the direction in which the seal portion extends.

<Storage section>
After the contents are received through the opening on the second edge 5 side, the second edge seal portion 15 is formed at the second edge seal portion (below the dashed line) indicated as 15a in FIG. 1, and the pouch is sealed. FIG. 5 is a front view of the pouch sealed by the second edge seal portion 15. The second edge seal portion 15 is formed along the second edge 5 from the third edge seal portion 16 to the fourth edge seal portion 17. The storage portion 11 is defined by the inner edge of the first edge seal portion 14, the inner edge of the third edge seal portion 16, the inner edge of the fourth edge seal portion 17, and the inner edge of the second edge seal portion 15. Therefore, the inner edge of the first edge seal portion 14, the inner edge of the third edge seal portion 16, the inner edge of the fourth edge seal portion 17, and the inner edge of the second edge seal portion 15 become the outer edge of the storage portion 11.

<Opening and closing mechanism>
Next, the opening/closing mechanism and the tubular member will be described. As shown in Figures 1 and 2, in the pouch of this embodiment, a fitting 20 is formed along the first edge 4 as an opening/closing mechanism that allows the pouch to be opened and resealed. In addition, a tubular member 30 is fixed between the fitting 20 and the first surface film 1. Figure 3 is a partial cross-sectional view of the pouch shown in Figures 1 and 2. In Figure 3, Figure 3(a) is a cross-sectional view corresponding to line A-A in Figure 1, Figure 3(b) is a partial cross-sectional view corresponding to line B-B in Figure 1, Figure 3(c) is a partial cross-sectional view corresponding to line C-C in Figure 1, and Figure 3(d) is an enlarged cross-sectional view of the fitting 20.

As shown in Figures 1, 2, and 3, the pouch is provided with an openable/closable fitting 20, which is located near the first edge 4 of the storage section 11 and is made up of a first member and a second member that fit together, as an opening/closing mechanism. The fitting 20 is made up of a male member 21 and a female member 22 that fit together. In this embodiment, the male member 21 is described as the first member and the female member 22 as the second member, but the female member 22 may be the first member and the male member 21 as the second member. As shown in Figures 1 and 2, the fitting 20, which is strip-shaped in plan view, is provided along the first edge 4. In this embodiment, the fitting 20 is provided so that its longitudinal direction is parallel to the first edge 4.

1 and 2, in the portion where the fitting 20 overlaps with the third edge seal portion 16 and the fourth edge seal portion 17, the first member, male member 21, and the second member, female member 22, are heat sealed and integrally fixed to the third edge seal portion 16 and the fourth edge seal portion 17. As shown in FIGS. 1 and 2, the fitting 20 has a first end 20a, which is the end portion closer to the first edge 4, formed at a position closer to the second edge 5 by a distance LF from the intended opening line 12 and opening start means 13 described later. The distance LF is not particularly limited, but can be, for example, LF = 27 mm.

3(a) and (b) show the male member 21 and female member 22 of the fitting 20 in a mated state. As shown in FIG. 3(a) and (b), the male member 21 is joined to the inner surface of the second surface film 2 by heat sealing or the like. Meanwhile, the female member 22 is different depending on whether or not the tubular member 30 is present. As shown in FIG. 3(a), in the area where the tubular member 30 is not present, the female member 22 is directly joined to the inner surface of the first surface film 1 by heat sealing or the like. As shown in FIG. 3(b), in the area where the tubular member 30 is present, the female member 22 is joined to the tubular member 30 by heat sealing or the like. Also, the tubular member 30 is joined to the female member 22 and the inner surface of the first surface film 1 by heat sealing or the like.

As shown in FIG. 3(d), the male member 21 has a first base 21a that is strip-shaped in plan view and a male fitting portion 21b on one side of the first base 21a, and the other side of the first base 21a is joined to the inner surface of the second surface film 2. The female member 22 has a second base 22a that is strip-shaped in plan view and a female fitting portion 22b on one side of the second base 22a, and the other side of the second base 22a is joined to the inner surface of the first surface film 1 or the tubular member 30.

The fitting 20 formed along the first edge 4 can be used as a zipper, making it possible to open and reseal the storage section 11. The joining surface of the fitting 20 is not limited to that shown in FIG. 3, and the first base 21a may be joined to the inner surface of the first surface film 1, and the second base 22a may be joined to the inner surface of the second surface film 2.

To avoid cluttering the drawings, in Figs. 3(a) and (b) the fitting 20 is shown with the entire first base 21a bonded to the second surface film 2, and the entire second base 22a bonded to the tubular member 30. In reality, however, it is normal for the fitting 20 to be unbonded over a certain range between the first end 20a, which is the end on the first edge 4 side of the fitting 20, and the second end 20b, which is the end on the second edge 5 side. This is to prevent the male fitting portion 21b and the female fitting portion 22b from being welded to each other. This is not a feature of this embodiment, so a detailed description will be omitted.

In this embodiment, as shown in Figs. 3(b) and (c), a tubular member 30 is sandwiched and fixed between the female member 22 and the first surface film 1. Specifically, the axial direction of the tubular member 30 is fixed in the direction connecting the first edge portion 4 and the second edge portion 5. The tubular member 30 fixed in this manner forms a flow path connecting the first edge portion 4 side and the second edge portion 5 side.

The cylindrical member 30 is not particularly limited as long as it is a cylindrical member having a cavity inside, and may have any structure. In this embodiment, it is configured to include a sealant layer and a base layer. FIG. 4 is an enlarged cross-sectional view of the cylindrical member 30 from the axial direction. As shown in FIG. 4, the cylindrical member 30 is configured by laminating a sealant layer 31 and a base layer 32. The sealant layer 31 is curved with the base layer 32 on the inside and the sealant layer 31 on the outside overlap at both ends. The overlapped sealant layers 31 are then heat-sealed to form a cylindrical shape. With this configuration, the walls of the cavity in the cylindrical member 30 become the base layer 32, so that they are not blocked during thermal processing and a flow path can be secured.

In this embodiment, the tubular member 30 is joined to the first surface film 1 and the female member 22 by heat sealing. The area joined by heat sealing is only the portion that overlaps with the female member 22 (fitting device 20) in a plan view. Therefore, the portion that does not overlap with the female member 22 (fitting device 20) and overlaps only with the first surface film 1 and the second surface film 2 is not joined. However, the portion that does not overlap with the female member 22 (fitting device 20) may also be fixed to the first surface film 1 by adhesive or the like. Note that, although the tubular member 30 is joined between the female member 22 and the first surface film 1 in this embodiment, it may also be joined between the male member 21 and the second surface film 2.

Here, the length in plan view will be explained. LA to LI in FIG. 1 indicate the length and distance when the pouch according to this embodiment is viewed in plan. LA is the length of the portion of the tubular member 30 that protrudes beyond the fitting 20 toward the first edge 4. Length LA corresponds to the distance from the first end 20a of the fitting 20 to the end of the tubular member 30 on the first edge 4 side. LB is the length of the portion of the tubular member 30 that protrudes beyond the fitting 20 toward the second edge 5 side. Length LB corresponds to the distance from the second end 20b of the fitting 20 to the end of the tubular member 30 on the second edge 5 side.

LC is the width (length) in a direction perpendicular to the axial direction of the tubular member 30. In this embodiment, the axial direction of the tubular member 30 coincides with the direction connecting the first edge 4 and the second edge 5 (the vertical direction in FIG. 1). Therefore, in this embodiment, the direction perpendicular to the axial direction of the tubular member 30 coincides with the direction connecting the third edge 6 and the fourth edge 7 (the horizontal direction in FIG. 1). The width LC is the width when the tubular member 30 is crushed by applying forces from both the first surface film 1 and the second surface film 2 so that the base layers 32 are in contact with each other. LD is the distance between the end of the tubular member 30 on the first edge 4 side and the inner edge of the first edge seal portion 14.

LE is the distance between the first end 20a of the fitting 20 and the inner edge of the first edge seal 14. LF is the distance between the opening initiation means 13 and the first end 20a of the fitting 20. LG is the distance between the inner edge of the third edge seal 16 and the inner edge of the fourth edge seal 17. The distance LG corresponds to the width of the pouch's storage section 11, and can also be called the inner dimension of the pouch in the width direction.

LH is the length of the tubular member 30 in the axial direction. The relationship between the length LH in the axial direction and the width LC in the width direction perpendicular to the axial direction, which determines the shape and size of the tubular member 30, can be set appropriately. It is preferable that the length LH is longer than twice the width LC. In other words, it is preferable that LH>2LC.

LI is the length of the fitting 20 in the direction connecting the first edge 4 and the second edge 5. The length LI corresponds to the distance between the first end 20a of the fitting 20 and the second end 20b of the fitting 20.

The length LA shown in FIG. 1 is the length of the portion of the tubular member 30 that protrudes from the first end 20a on the first edge 4 side of the opening/closing mechanism (fitting 20) in a plan view to the first edge 4 side. The length LB shown in FIG. 1 is the length of the portion of the tubular member 30 that protrudes from the second end 20b on the second edge 5 side of the opening/closing mechanism (fitting 20) in a plan view to the second edge 5 side. In this embodiment, the length of the portion of the tubular member 30 that protrudes from the first end 20a on the first edge 4 side of the opening/closing mechanism (fitting 20) in a plan view to the first edge 4 side is longer than the length of the portion that protrudes from the second end 20b on the second edge 5 side of the opening/closing mechanism (fitting 20) in a plan view to the second edge 5 side. That is, LA>LB. Furthermore, it is preferable that the length LA is longer than twice the length LB. That is, it is preferable that LA>2LB.

After the sealed pouch is opened along the intended opening line 12, the pouch can be opened and closed using the fitting 20. Even when resealed with the fitting 20, the cavity within the tubular member 30 allows the space on the first edge 4 side of the fitting 20 to communicate with the space on the second edge 5 side of the fitting 20, allowing the flow of gas, liquid, powder, etc. This embodiment is characterized in that it has a structure that makes it easy to remove the air inside, so that the pouch can be stored compactly in the resealed state after opening.

In order to remove the air from the inside of the storage section 11, it is necessary to make it relatively easy for the air to move from the inside to the outside and relatively difficult for the air to move from the inside to the outside. Therefore, in this embodiment, LA>LB is set so that the air flows out to the first edge 4 side more easily than it flows in to the second edge 5 side. By making the length LA relatively long, the tubular member 30 protrudes from the fitting 20 to the first edge 4 side. Therefore, air from the first edge 4 side (the outside side of the storage section 11) is more likely to hit the outer wall part of the tubular member 30, making it difficult to pass through the inside of the tubular member 30. On the other hand, by making the length LB relatively short, the tubular member 30 protrudes from the fitting 20 to the second edge 5 side. Therefore, air from the second edge 5 side (the inside side of the storage section 11) is less likely to hit the outer wall part of the tubular member 30, making it easier to pass through the inside of the tubular member 30.

It is preferable that the length LB is as small as possible, and it is most preferable that LB = 0. However, due to the difficulty of alignment during manufacturing, there may be a slight deviation. If the end of the tubular member 30 on the second edge 5 side is above the second end 20b of the fitting 20, the part of the female member 22 near the second end 20b that does not overlap with the tubular member 30 will be joined to the second surface film 2, blocking the opening at the end of the tubular member 30 on the second edge 5 side. For this reason, taking into account the deviation during manufacturing, the tubular member 30 is positioned so that the length LB > 0. Preferably, LB ≥ 1 (mm).

In addition, it is preferable that the end of the tubular member 30 on the first edge 4 side and the inner edge of the first edge seal portion 14 are spaced apart so that the opening at the end of the tubular member 30 on the first edge 4 side is not blocked when the first edge seal portion 14 is formed. In other words, it is preferable that the distance LD>0. Furthermore, it is more preferable that the distance LD>2 (mm). Note that the distance LD satisfies LD=LE-LA with respect to the length LA and the distance LE. Therefore, when the distance LD>0, LE>LA.

When cutting the first edge 4 side along the planned opening line 12 connecting the two opening start means 13, it is preferable that the tubular member 30 does not overlap the planned opening line 12 so as to make it easier to cut. Therefore, it is preferable that the end of the tubular member 30 on the first edge 4 side is located closer to the second edge 5 side than the opening start means 13. In other words, it is preferable that the length LA and the distance LF satisfy LF>LA. Due to the nature of the opening start means 13 and the planned opening line 12, the opening start means 13 needs to be located closer to the second edge 5 side than the inner edge of the first edge seal portion 14. Therefore, LE>LF. In addition, since it is preferable that LD (=LE-LA) is 2 mm or more, it is more preferable that (LF-LA)≧1 (mm).

In addition, in order to make it difficult for air from the first edge 4 side (the outside side of the storage section 11) to enter the inside of the tubular member 30, it is preferable that the width of the tubular member 30 is somewhat smaller than the inner pouch width dimension, which is the distance between the inner edge of the third edge seal section 16 and the inner edge of the fourth edge seal section 17. Specifically, it is preferable that the distance LG is 5 times or more the width LC. In other words, it is preferable that the width LC and the distance LG satisfy LG ≧ 5LC.

1, the dashed line extending in the vertical direction is a center line CL that is equidistant from the inner edge of the third edge seal portion 16 and the inner edge of the fourth edge seal portion 17. Therefore, the center line CL is LG/2 away from the inner edge of the third edge seal portion 16, and is also LG/2 away from the inner edge of the fourth edge seal portion 17. The tubular member 30 is formed so as to overlap the center line CL, which is a line that is equidistant from the inner edge of the third edge seal portion 16 and the inner edge of the fourth edge seal portion 17. As a result, the tubular member 30 is located near the center of the width direction (left-right direction in FIG. 1) of the storage portion 11. By positioning the tubular member 30 near the center of the width direction (left-right direction in FIG. 1) of the storage portion 11, the air in the storage portion 11 is allowed to flow in widely and is easily discharged to the first edge portion 4 side.

The material of the fitting 20 can be a resin that is compatible with the sealant layer of the laminated film used as the first surface film 1 and the second surface film 2, and the sealant layer 31 of the tubular member 30. As shown in FIG. 3, the fitting 20 is composed of a male member 21 and a female member 22, and the male member 21 is joined to the second surface film 2, and the female member 22 is joined to the first surface film 1 and the tubular member 30 by heat sealing. At this time, a heat shield plate (not shown) is interposed between the male member 21 and the female member 22 to prevent the male member 21 and the female member 22 from thermally fusing.

<Contents>
The contents are not particularly limited, and may be food or non-food. The food may be foodstuffs that are the main object of eating, or seasonings that flavor foodstuffs. In addition, it may be raw materials for constituting foodstuffs such as flour. The form of the contents is not particularly limited, but solids and powders are suitable.

<Film details>
A laminated film can be used as the first surface film 1 and the second surface film 2 of the pouch. The laminated film is a laminate including at least a base layer and a sealant layer from the outside. For example, the laminated film is formed by laminating a base layer, a printed layer, other layers (e.g., a barrier layer), and a sealant layer in this order from the outside. The printed layer and other layers are not essential. An adhesive layer can also be used to laminate these layers. The sealant layer is a layer that constitutes the innermost surface of the pouch. As the material of the base layer, a polyester film such as polyethylene terephthalate or polybutylene terephthalate, a polyamide film such as nylon, a polypropylene film, or the like can be used. The thickness is about 10 μm to 50 μm. The base layer is preferably biaxially stretched.

The laminated film may also have multiple substrate layers. The multiple substrate layers may include a first substrate layer and a second substrate layer. The first substrate layer and the second substrate layer may be selected from the above materials in appropriate combination. For example, polyethylene terephthalate may be used as the first substrate layer, which is the outermost layer, and polyamide may be used as the second substrate layer, which is the inner layer (sealant layer side). The second substrate layer is stretched from one side edge to the other side edge. For example, "Emblem (registered trademark) NC" manufactured by Unitika Ltd., which contains MXD (metaxylenediamine) having excellent barrier properties, may be used as the second substrate layer. In addition, polyester such as "Emblet (registered trademark) PCBC" manufactured by Unitika Ltd. may be used as the second substrate layer. The first substrate layer and the second substrate layer may be laminated, for example, by a dry lamination method.

The printing layer is provided to display the product contents, to impart an aesthetic look, and to display cut portions. The printing layer is formed from printing ink containing a binder and a pigment. The sealant layer is placed on the side of the laminated film that will be the innermost side of the container when the film is made into a pouch. Polyolefin resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, and ethylene-propylene block copolymer can be used as the material for the sealant layer. The thickness of the sealant layer is 30 μm or more and 150 μm or less. It is preferable that the sealant layer is unstretched.

The laminated film may include other layers. The other layers may be provided on the outside of the base layer, or between the base layer and the sealant layer. As the other layers, appropriate ones are selected according to the required functions, such as water vapor and other gas barrier properties, light shielding properties, etc. For example, when the other layer is a gas barrier layer, a vapor deposition layer of a metal oxide such as aluminum oxide or an inorganic oxide such as silicon oxide is provided. The vapor deposition layer may be laminated on the base layer or may be vapor deposited on the sealant layer. In addition, a resin layer having gas barrier properties, such as ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride resin (PVDC), or aromatic polyamide such as nylon MXD6, may be provided. Each layer can be laminated using a dry lamination method, a melt extrusion method, or the like.

Specific examples of the layer structure of the laminated film include those having one base layer as follows.
・Transparent vapor-deposited stretched nylon (ONY) 15 μm / printing layer (ink) / adhesive / linear low-density polyethylene (LLDPE) 60 μm (total thickness 79 μm)
・Transparent vapor-deposited polyethylene terephthalate (PET) 12 μm / printing layer / adhesive / LLDPE 80 μm (total thickness 96 μm)

Furthermore, examples of a substrate having two layers include the following.
・Transparent vapor-deposited PET 12 μm/printed layer/adhesive/ONY 15 μm/adhesive/LLDPE 50 μm (total thickness 84 μm)
- ONY 15 μm / printing layer / adhesive / transparent vapor deposition PET 12 μm / adhesive / LLDPE 80 μm (total thickness 114 μm)
・Transparent vapor-deposited PET 12 μm/printed layer/adhesive/ONY 15 μm/adhesive/CPP 50 μm (total thickness 84 μm)
PET 12 μm / printing layer / adhesive / transparent vapor deposition PET 12 μm / adhesive / CPP 60 μm (total thickness 91 μm)

<Fitting tool material>
The material of the fitting 20 may be any material that can be welded to the first surface film 1, the second surface film 2, and the tubular member 30. A resin compatible with the sealant layer of the laminated film used as the first surface film 1 and the second surface film 2, and the sealant layer 31 of the tubular member 30 can be used. Specifically, it is preferable to use an olefin-based resin such as polyethylene (PE) or polypropylene (PP) that is compatible with the sealant layer of the laminated film and the sealant layer 31 of the tubular member 30. As the olefin-based resin, a polyethylene-based resin such as low-density polyethylene or linear low-density polyethylene, or a polypropylene-based resin is preferable. As the polypropylene-based resin, homopolypropylene, block polypropylene, random polypropylene (RPP), propylene-ethylene-butene 1 random terpolymer, etc. can be used. As shown in FIG. 3, the fitting 20 is composed of a male member 21 and a female member 22, and the male member 21 is joined to the second surface film 2, and the female member 22 is joined to the tubular member 30 and the first surface film 1 by heat sealing. At this time, a heat shield plate (not shown) is interposed between the male member 21 and the female member 22 to prevent the male member 21 and the female member 22 from being thermally welded together.

<Material of the cylindrical member>
In this embodiment, the tubular member 30 has the sealant layer 31 and the base layer 32 as described above. As the sealant layer 31, a sealant layer similar to that provided in the laminated film used as the first surface film 1 and the second surface film 2 can be used. Thus, as the sealant layer 31, a polyolefin resin such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-propylene block copolymer, etc. can be used. As the base layer 32, a material similar to that provided in the laminated film used as the first surface film 1 and the second surface film 2 can be used. Thus, as the base layer 32, a polyester film such as polyethylene terephthalate or polybutylene terephthalate, a polyamide film such as nylon, a polypropylene film, etc. can be used.

<Method of starting opening and planned opening line>
In this embodiment, a planned opening line 12 extending in a direction connecting the third edge 6 and the fourth edge 7 is defined between the first edge seal portion 14 and the first end 20a of the fitting 20. The planned opening line 12 is a planned opening position where opening is planned. The planned opening line 12 is preferably defined parallel to the first edge 4 and the second edge 5. In this embodiment, the third edge seal portion 16 and the fourth edge seal portion 17 are each formed with an opening start means 13. The opening start means 13 can be realized by a cut or notch also called a notch. In this embodiment, the opening start means 13 is a cut extending from the third edge portion 6 and the fourth edge portion 7. In this embodiment, the planned opening line 12 is not actually formed, but is defined as a straight line connecting the two opening start means 13.

When the opening initiation means 13 is not formed, the opening line 12 can be realized by a half-cut line that penetrates the base layer but does not penetrate the sealant layer. In the case of a half-cut line, the opening line 12 may be formed using a blade or by laser processing. In the case of a half-cut line, the opening line 12 may be a line that extends continuously or a line that extends intermittently. The opening line 12 may be provided so as to extend from the third edge 6 to the fourth edge 7 of the pouch.

The opening line 12 may be realized by a straight-cut film. A straight-cut film is a film that can be torn linearly in one direction. The straight-cut film has a tensile strength in the MD direction (the flow direction of the film) greater than the tensile strength in the TD direction (the direction perpendicular to the MD direction). When the opening line 12 is realized by a straight-cut film, a straight-cut film is used for at least one of the base layer and the sealant layer. When a straight-cut film is used for the base layer, for example, Emblet (registered trademark) PC or Emblem (registered trademark) NC manufactured by Unitika Co., Ltd. can be used as the base layer. The tensile strength of Emblet (registered trademark) PC in the MD direction is 200 MPa, and the tensile strength in the TD direction is 180 MPa. When an easy-to-cut film is used for the sealant layer, for example, LL-MTNST manufactured by Futamura Chemical Co., Ltd. can be used as the sealant layer.

When creating a planned opening line using straight-cut film, the film can be opened at any position along the first edge 4. For this reason, if there is no indication, it is difficult to determine where to cut. Therefore, when creating a planned opening line using straight-cut film, the planned opening line is indicated by printing. For example, the position of the planned opening line 12 shown by the dashed line in Figure 1 can be determined by actually printing a line at the position.

<Modification>
Next, a modified example will be described. In the above embodiment, the tubular member 30 is arranged at a position overlapping with the center line CL that is equidistant from the inner edge of the third edge seal portion 16 and the inner edge of the fourth edge seal portion 17. That is, the tubular member 30 is arranged at a position near the center in the width direction of the pouch. The closer the tubular member 30 is to the center in the width direction of the pouch, the easier it is to evenly take in air within the storage section. However, it is not necessarily required that the tubular member 30 is arranged near the center in the width direction of the pouch.

Figure 7 is a front view of a pouch in a modified example. Like Figure 1, Figure 7 shows the state before the contents are filled. In the pouch of the modified example shown in Figure 7, the tubular member 30 is arranged at a position closer to the inner edge of the third edge seal portion 16 than the center in the width direction of the pouch. More specifically, it is arranged at a position where the distance between the end of the tubular member 30 closer to the third edge seal portion 16 and the inner edge of the third edge seal portion 16 is LJ. It is preferable that the distance LJ is LJ ≥ 1 (mm). This is to prevent the third edge seal portion 16 and the tubular member 30 from overlapping. In the example of Figure 7, an example in which the tubular member 30 is arranged closer to the third edge seal portion 16 is shown, but the tubular member 30 may be arranged closer to the fourth edge seal portion 17. In that case, the distance LJ is the distance between the end of the tubular member 30 closer to the fourth edge seal portion 17 and the inner edge of the fourth edge seal portion 17. Ultimately, the tubular member 30 can be used effectively by being positioned at a distance LJ or more away from the inner edge of the third edge seal portion 16 and the inner edge of the fourth edge seal portion 17.

<How to use the pouch>
A method of using the pouch according to this embodiment will be described. First, in the pouch as shown in FIG. 5, the first edge 4 side is cut from the opening start means 13 located closer to the second edge 5 than the first edge seal portion 14 along the planned opening line 12 to open the pouch. FIG. 6 is a front view of the pouch after opening. The fitting tool 20, which is an opening/closing mechanism, can be easily opened and closed by a simple operation. Therefore, the user can release the fitting tool 20 as necessary to form an opening between the male member 21 and the female member 22. Then, the contents are taken out from this opening. When storing the contents remaining in the pouch, the fitting tool 20 is fitted to close the opening and the pouch is resealed. The pouch containing the remaining contents is stored in this state. In this way, even when the fitting tool 20 is fitted to close the opening, in the pouch of this embodiment, the tubular member 30 allows ventilation between the storage section 11 and the outside.

In addition, in the pouch of this embodiment, the length of the portion of the tubular member 30 that protrudes from the end (first end 20a) on the first edge 4 side of the opening/closing mechanism (fitting device 20) in a plan view toward the first edge 4 side is longer than the length of the portion that protrudes from the end (second end 20b) on the second edge 5 side of the opening/closing mechanism toward the second edge 5 side (LA>LB), so air is more likely to flow out toward the first edge 4 side than into the second edge 5 side. This structure allows air to escape from within the storage section 11 during storage, reducing the volume of the pouch and allowing it to be stored compactly.

Example 1
A PET film having a thickness of 12 μm was used as the first base layer of the laminated film, an aluminum foil having a thickness of 7 μm was used as the second base layer of the laminated film, and an LLDPE film having a thickness of 30 μm was used as the sealant layer of the laminated film. Specifically, a printed layer was first formed on the inner surface side of the PET film having a thickness of 12 μm, which was the base layer. The printed layer also included printing of a line segment indicating the position of the opening planned line 12. Then, the surface of the printed layer side was bonded to an aluminum foil having a thickness of 7 μm via an adhesive layer, and further, the aluminum foil was bonded to an LLDPE film having a thickness of 30 μm via an adhesive layer. As a result, a packaging material was obtained that was a laminated film having a layer structure of PET 12 μm/printed layer/adhesive layer/aluminum foil 7 μm/adhesive layer/LLDPE 30 μm. The adhesive layer was a cured product of an acrylic polyol and an isocyanate compound.

The obtained laminated film was cut to 130 mm x 190 mm to form the first surface film 1 and the second surface film 2. Meanwhile, the ends of the sheet in which the polyethylene sealant layer 31 and the polyethylene terephthalate base layer 32 were laminated were folded back, and the sealant layers 31 were heat sealed to form a tube, which was then cut to a length of 41 mm (= LH) to form the tubular member 30. The tubular member 30 was then temporarily fixed with an adhesive in a specified position and in a specified orientation on the side that would become the inner surface of the first surface film 1.

Furthermore, a fitting 20 made of polyethylene compatible with the LLDPE sealant layer was prepared. The width LI of the fitting 20 was set to 14 mm. A heat shield plate (not shown) was interposed between the male member 21 and the female member 22, and heat sealing was performed to bond the female member 22 and the tubular member 30 to the inner surface side of the first surface film 1, and the male member 21 to the inner surface side of the second surface film 2. At the location where the tubular member 30 exists on the inner surface side of the first surface film 1, the first surface film 1 and the tubular member 30, and the tubular member 30 and the female member 22 were bonded as shown in FIG. 3(a). In this way, a pouch according to this embodiment shown in FIG. 1, which includes the first surface film 1 and the second surface film 2 (a pouch in a state where the second edge seal portion 15 is not formed) was formed. After that, the contents were filled into the storage portion 11 from the second edge 5 side.

Then, the second edge seal portion 15 was formed to form the sealed pouch shown in FIG. 5. The seal width of the first edge seal portion 14 was 15 mm, the seal width of the second edge seal portion 15 was 10 mm, and the seal widths of the third edge seal portion 16 and the fourth edge seal portion 17 were each 10 mm. LA to LI, which indicate the lengths and distances shown in FIG. 1, were LA=25, LB=2, LC=15, LD=5, LE=30, LF=27, LG=110, LH=41, LI=14, and LJ=47.5 (all in mm). The pouch in Example 1 satisfied the conditions of LA>2LB, LB≧1 (mm), distance LD≧2 (mm), LE>LA, LF>LA, LE>LF, (LF-LA)≧1 (mm), and LG≧5LC.

Example 2
The laminated film obtained in the same manner as in Example 1 was cut into a size of 190 mm x 290 mm to form the first surface film 1 and the second surface film 2. The ends of a sheet in which a polyethylene sealant layer 31 and a polyethylene terephthalate base material layer 32 were laminated were folded back, and the sealant layers 31 were heat-sealed to form a tube, which was then cut to a length of 39 mm (=LH) to form a tubular member 30. The tubular member 30 was then temporarily fixed with an adhesive at a predetermined position and in a predetermined orientation on the side that would become the inner surface of the first surface film 1.

In the same manner as in Example 1, a heat shield (not shown) was placed between the male member 21 and female member 22 of the polyethylene fitting 20 and heat sealed to bond the female member 22 and the tubular member 30 to the inner surface side of the first surface film 1, and the male member 21 to the inner surface side of the second surface film 2. In this manner, a pouch according to this embodiment shown in FIG. 1 equipped with the first surface film 1 and the second surface film 2 (a pouch in a state in which the second edge seal portion 15 is not formed) was formed. The contents were then filled into the storage portion 11 from the second edge 5 side.

Then, the second edge seal portion 15 was formed to form the sealed pouch shown in FIG. 5. The seal width of the first edge seal portion 14 was 5 mm, the seal width of the second edge seal portion 15 was 5 mm, and the seal width of the third edge seal portion 16 and the fourth edge seal portion 17 were each 5 mm. LA to LI, which indicate the length and distance shown in FIG. 1, were LA=23, LB=2, LC=15, LD=7, LE=30, LF=25, LG=180, LH=39, LI=14, and LJ=82.5 (all in mm). The pouch in Example 2 satisfied the conditions of LA>2LB, LB≧1 (mm), LD≧2 (mm), LE>LA, LF>LA, LE>LF, (LF-LA)≧1 (mm), and LG≧5LC.

<Comparative Example 1>
A pouch of Comparative Example 1 was formed in the same manner as in Example 1, except that the tubular member 30 was not provided.

<Comparative Example 2>
A pouch of Comparative Example 2 was formed in the same manner as in Example 2, except that the tubular member 30 was not provided.

<Storage test>
A storage stability test was carried out for Examples 1 and 2 and Comparative Examples 1 and 2. Specifically, 25 g of calcium chloride was stored in an environment of 40° C. and 90% RH (relative humidity), and the amount of moisture absorption was measured every predetermined number of days. The test results are shown in Table 1.

As shown in Table 1, Examples 1 and 2, which were provided with the tubular member 30, absorbed less moisture than Comparative Examples 1 and 2, respectively. Specifically, when comparing pouches of the same shape, the pouch of Example 1 absorbed less moisture than the pouch of Comparative Example 1, and the pouch of Example 2 absorbed less moisture than the pouch of Comparative Example 2. This is thought to be because the pouches of Examples 1 and 2 absorb less moisture because the tubular member 30 allows air to be expelled to the outside. This test showed that the pouches of Examples 1 and 2 have a higher air expelling effect than pouches that do not have the tubular member 30.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and various modifications are possible. For example, in the above embodiment, the two laminated films, the first surface film 1 and the second surface film 2, are stacked together to form a so-called flat pouch, but the pouch may also be in the form of a so-called standing pouch in which a folded bottom film is sandwiched between the first surface film 1 and the second surface film 2 and a bottom gusset portion is formed on the second edge portion 5 side.

In the above embodiment, the first surface film 1 and the second surface film 2 are designated as "first" and "second" for the sake of convenience. The first surface film 1 and the second surface film 2 are symmetrical to each other, so either may be designated as "first" and either may be designated as "second." The third edge portion 6 and the fourth edge portion 7 are also symmetrical to each other, so either may be designated as the third edge portion and either may be designated as the fourth edge portion.

1... First surface film 2... Second surface film 4... First edge 5... Second edge 6... Third edge 7... Fourth edge 11... Storage section 12... Planned opening line 13... Opening initiation means 14... First edge seal section 15... Second edge seal section 15a... Planned second edge seal section 16... Third edge seal section 17... Fourth edge seal section 20... Fitting (opening/closing mechanism)
21: Male member 21a: First base 21b: Male fitting portion 22: Female member 22a: Second base 22b: Female fitting portion 30: Cylindrical member LA: Length of the portion of the cylindrical member 30 protruding from the fitting 20 toward the first edge portion 4 LB: Length of the portion of the cylindrical member 30 protruding from the fitting 20 toward the second edge portion 5 LC: Width (length) in a direction perpendicular to the axial direction of the cylindrical member 30
LD: Distance between the end of the tubular member 30 on the first edge 4 side and the inner edge of the first edge seal portion 14 LE: Distance between the first end 20a of the fitting 20 and the inner edge of the first edge seal portion 14 LF: Distance between the unsealing initiation means 13 and the first end 20a of the fitting 20 LG: Distance between the inner edge of the third edge seal portion 16 and the inner edge of the fourth edge seal portion 17 LH: Length in the axial direction of the tubular member 30 LI: Length of the fitting 20 in the direction connecting the second edge 4 and the second edge 5 LJ: Distance between the end of the tubular member 30 closer to the third edge seal portion 16 and the inner edge of the third edge seal portion 16 (or distance between the end of the tubular member 30 closer to the fourth edge seal portion 17 and the inner edge of the fourth edge seal portion 17)

Claims (5)

A pouch having a container between a first surface film and a second surface film,
A first edge portion;
a second edge portion opposite the first edge portion;
a third edge and a fourth edge extending between the first edge and the second edge;
a first edge seal formed along the first edge;
an opening/closing mechanism formed between the first edge portion and the second edge portion and closer to the first edge portion;
a cylindrical member sandwiched between the first surface film or the second surface film and the opening/closing mechanism,
an end portion of the tubular member on the first edge side is located on the second edge side with respect to an inner edge of the first edge seal portion;
a distance between inner edges of a third edge seal portion formed along the third edge portion and a fourth edge seal portion formed along the fourth edge portion is 110 mm or more and 180 mm or less;
The cylindrical member has an axial length of 39 mm or more and 41 mm or less,
The length in the width direction is less than 0.5 times the length in the axial direction,
a distance between inner edges of a third edge seal portion formed along the third edge portion and a fourth edge seal portion formed along the fourth edge portion is 8 times or more and 12 times or less than a width of the tubular member in a direction connecting the third edge portion and the fourth edge portion;
a pouch in which the length of a portion of the tubular member protruding from the end of the first edge side of the opening/closing mechanism toward the first edge side in a planar view is 11.5 times or more and 12.5 times or less than the length of a portion of the opening/closing mechanism protruding from the end of the second edge side of the opening/closing mechanism toward the second edge side. The pouch according to claim 1 , wherein an end portion of the tubular member on the first edge side is located on the second edge side of a planned opening position extending in a direction connecting the third edge and the fourth edge. 3. The pouch according to claim 1, wherein the tubular member is formed at a position that does not overlap with a third edge seal portion formed along the third edge and a fourth edge seal portion formed along the fourth edge . 4. The pouch of claim 3 , wherein the tubular member is formed to overlap a line equidistant from an inner edge of the third edge seal and an inner edge of the fourth edge seal. A storage portion is provided between the first surface film and the second surface film,
a first edge portion, a second edge portion opposite the first edge portion, a third edge portion and a fourth edge portion extending between the first edge portion and the second edge portion, a first edge seal portion formed along the first edge portion, an opening and closing mechanism formed between the first edge portion and the second edge portion and closer to the first edge portion, and one of the first surface film and the second surface film, and a tubular member sandwiched between the opening and closing mechanism,
an end portion of the tubular member on the first edge side is located on the second edge side with respect to an inner edge of the first edge seal portion,
a distance between inner edges of a third edge seal portion formed along the third edge portion and a fourth edge seal portion formed along the fourth edge portion is 110 mm or more and 180 mm or less;
The cylindrical member has an axial length of 39 mm or more and 41 mm or less,
The length in the width direction is less than 0.5 times the length in the axial direction,
a distance between inner edges of a third edge seal portion formed along the third edge portion and a fourth edge seal portion formed along the fourth edge portion is 8 times or more and 12 times or less than a width of the tubular member in a direction connecting the third edge portion and the fourth edge portion;
a length of a portion of the tubular member protruding from an end of the opening/closing mechanism on the first edge side toward the first edge side in a plan view is 11.5 times or more and 12.5 times or less than a length of a portion of the opening/closing mechanism protruding from an end of the opening/closing mechanism on the second edge side toward the second edge side,
a cut is made at a position closer to the second edge than the first edge seal portion, and the first edge side is unsealed to form an opening;
After removing the contents, the opening and closing mechanism is closed to reseal the pouch;
A method of using the pouch includes storing the pouch with the remaining contents.