JP2005162274A - Packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag with which the fingers are not soiled with contents when it is opened, and the contents do not drip. <P>SOLUTION: The packaging bag is formed of a rectangular base at least equipped with a base material layer and an inner layer made of a heat-sealable resin wherein the inner layers are opposed to each other. The bag has side rim heat-sealed regions at a pair of opposite end rims and an end rim heat-sealed region at one end rim intersecting at right angles with the side rim heat-sealed region, and is equipped with an approximate strip-formed bulkhead heat-sealed region across the side rim heat-sealed regions on the side of the end rim heat-sealed region. The base which constitutes at least one of surfaces of the packaging bag is equipped peelably with an undrawn resin layer adjacent to the surface of the inner layer on the side of the base material layer. A cut line passing from the internal surface through the inner layer along the bulkhead heat-sealed region is formed on the base constituting one of the surfaces in the vicinity of both end rims of the bulkhead heat-sealed region in the direction parallel to the side end rim heat-sealed region. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a packaging bag for containing liquid or viscous contents, such as curry, stew, soup, sauces, and other foods and seasonings. It is related with the packaging bag which does not contaminate etc. with the contents.

  Traditionally, liquid and viscous contents such as curry, stew, soup and other seasonings such as meat sauce and demiglace sauce are applied directly to the four-sided seal type and standing type packaging bags with a gusset at the bottom. It is housed and sold.

  The above-described packaging bag is provided with notches such as I-shape and V-shape as opening start means (for example, refer to Patent Document 1), or is provided with an opening cut line connected to the opening start means ( For example, Patent Document 2) provides means for facilitating the opening of the packaging bag.

The foods and seasonings described above are, for example, subjected to heat and pressure sterilization treatment and distributed at room temperature. When used, for example, the whole packaging bag is heated with hot water, and then opened by the opening means described above. The contents are taken out and used. However, the opening means as described above, when the packaging bag is opened along the planned opening line because the position of the planned opening line is naturally located on the contents side of the thermal bonding portion. There was a problem that the contents adhered to the mouth, which caused the fingers to become dirty when opened, and the contents to hang down.
Utility Model Registration No. 3001221 Japanese Patent Laid-Open No. 10-167319

  Accordingly, the present invention has been made in order to solve the above-described problem, and is to provide a packaging bag in which fingers are not soiled with contents when opened, and contents are not dripped when opened. .

  In order to achieve the above-mentioned object, the inventor of the present invention described in claim 1 is configured such that a rectangular substrate having at least a base material layer and an inner layer made of a heat-adhesive resin is opposed to each other. A pair of opposing end edges having a side edge thermal bonding portion and an edge thermal bonding portion at one edge perpendicular to the side edge thermal bonding portion and the side facing the edge thermal bonding portion side. A packaging bag provided with a substantially band-shaped partition wall thermal bonding portion straddling the edge thermal bonding portion, wherein the base constituting at least one surface of the packaging bag is adjacent to the surface of the inner layer on the base material layer side In addition, an unstretched resin layer is provided, and the adhesive strength between the inner layer and the unstretched resin layer is configured to be peelable, and both ends of the partition heat-bonding portion in the direction parallel to the side edge heat-bonding portion. A score line that penetrates the inner layer from the inner surface side along the partition wall thermal bonding portion in the vicinity of the edge constitutes the one surface. And it is characterized in that it is formed on the substrate to.

  According to a second aspect of the present invention, in the packaging bag of the first aspect, the inner layer and the unstretched resin layer are made of different resins.

  Moreover, this invention of Claim 3 is a packaging bag in any one of Claim 1, 2, The adhesive strength of the said inner layer and the said unstretched resin layer is 0.2-5.0N / 15mm width. It is characterized by being.

  Moreover, the present invention according to claim 4 is the packaging bag according to any one of claims 1 to 3, wherein the partition heat-bonding portion has a central portion protruding toward the edge heat-bonding portion. It is what.

  Since the contents of the packaging bag of the present invention are blocked by the partition heat-bonding part, even if the opening is provided by opening the opening means, the fingers are not soiled and the contents are not drooped. In addition, when taking out the contents, the two bases constituting the packaging bag are peeled away from each other in a direction away from each other, thereby separating from the cut line on the edge thermal bonding portion side of the partition thermal bonding portion. A cut line formed in the vicinity of the other edge of the partition wall heat-bonded portion when a peeling interface moves between the unstretched resin layer and the inner layer of the base constituting the one surface and then peels off. Then, the packaging bag is opened, and the contents can be easily taken out.

The above-described present invention will be described in detail below with reference to the drawings.
1 is a plan view schematically showing an embodiment of a packaging bag according to the present invention, FIG. 2 is an enlarged sectional view taken along line XX of FIG. 1, and FIG. 3 is an illustration of a method for opening the packaging bag according to the present invention. 1 is a packaging bag, 2 is a side edge thermal bonding portion, 3, 3 ′ is an edge thermal bonding portion, 4 is a partition thermal bonding portion, and 5 and 5 ′ are notches. Lines, 6 are notches, 10 and 10 'are substrates, 11 is a base material layer, 12 is an inner layer, and 13 is an unstretched resin layer.

  FIG. 1 is a plan view schematically showing an embodiment of a packaging bag according to the present invention. FIG. 2 is an enlarged sectional view taken along line XX of FIG. A base 10 provided with at least an inner layer 12 made of an adhesive resin, and at least an unstretched resin layer 13 adjacent to the surface of the base layer 11, the inner layer 12, and the inner layer 12 on the base layer 11 side. A pair of side edge thermal bonding portions facing each other with the inner layers 12 facing each other, and a base body 10 ′ configured so that the adhesive strength between the unstretched resin layer 13 and the inner layer 12 can be peeled off. 4 is a four-side-seal type packaging bag sealed with another set of upper and lower edge thermal bonding portions 3, 3 ′ facing each other. In the packaging bag 1, a substantially strip-shaped partition wall thermal bonding portion 4 straddling the side edge thermal bonding portion 2 on the upper edge thermal bonding portion 3 side protrudes to the upper edge thermal bonding portion 3 side. And a cut line that penetrates the inner layer 12 from the inner surface side along the partition wall thermal bonding portion 4 in the vicinity of both end edges in a direction parallel to the side edge thermal bonding portion 2 of the partition thermal bonding portion 4 5, 5 ′ (actually, the ends of the cut lines 5, 5 ′ are located in the unstretched resin layer 13) are formed on the base body 10 ′. A notch 6 (one V-shaped notch in FIG. 1) is provided at the outer edge of the side edge thermal bonding part 2 between the upper edge thermal bonding part 3 and the partition thermal bonding part 4. Is formed. Although not shown, for example, contents such as curry, stew, soup, meat sauce, and demiglace sauce are the side edge thermal bonding part 2, the partition thermal bonding part 4, and the lower edge thermal bonding part 3 '. It is accommodated in the area surrounded by.

  Next, the usage method of the packaging bag 1 is demonstrated. First, using the notch 6 formed in the packaging bag 1, the upper portion including the upper edge thermal bonding portion 3 is removed by cutting in parallel with the upper edge thermal bonding portion 3. Next, when the base 10, 10 'of the cut packaging bag 1 is picked with fingers and peeled away in a direction away from each other, a peeling interface is formed from the projecting central portion of the score line 5 in the base 10'. When the film is moved between the inner layer 12 and the unstretched resin layer 13 (see FIG. 3A) and further peeled off, the peeling interface is moved to the cut line 5 ′, and the packaging bag 1 is opened and opened. Is formed (see FIG. 3B), and the contents can be easily taken out by directing the opening to the lower side. In this series of opening operations, the finger does not touch the contents, so that the fingers are not soiled and the contents do not sag.

Next, the base bodies 10 and 10 ′ constituting the packaging bag 1 will be described.
Since the base material layer 11 of the substrates 10 and 10 'is a basic material constituting the packaging bag 1, a synthetic resin film having excellent properties in mechanical, physical, chemical and the like is used. For example, a resin such as polyester, polyamide, or polypropylene can be used. Moreover, as a film using these resins, a stretched film stretched in a uniaxial direction or a biaxial direction is suitable. This is because usually the substrate layer 11 is often printed and printability is required. The thickness of the film constituting the base material layer 11 may be a thickness that can be kept to the minimum necessary for strength, rigidity, etc. as a basic material, and may be determined in consideration of cost and the like. It is approximately 12 to 25 μm.

  Further, the inner layer 12 of the substrates 10 and 10 ′ may be a layer formed from a heat-adhesive resin that can be melted by heat and welded to each other, and may be appropriately selected depending on physical properties required for the packaging bag 1. For example, low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, polypropylene, ethylene-α olefin copolymer, ethylene-propylene copolymer , An ethylene-vinyl acetate copolymer, an ionomer resin, an acid copolymer of ethylene and acrylic acid, an ester copolymer of ethylene and acrylic acid ester, and the like.

  Further, the unstretched resin layer 13 of the base body 10 'has a peelable strength, specifically 0.2 to 5.0 N / 15 mm width, between the layer 13 and the inner layer 12. It is important. In the present invention, basically, the adhesive strength between the unstretched resin layer 13 and the inner layer 12 is such that the resin used for the unstretched resin layer 13 and the resin used for the inner layer 12 are made of different resins. It is necessary to select the resin that forms the unstretched resin layer 13 by the resin used for the inner layer 12 in order to obtain an interlayer strength that is 0.2 to 5.0 N / 15 mm width in terms of the adhesive strength. It is difficult to comprehensively describe these combinations collectively. For example, polyethylene layer / polypropylene layer, polyethylene layer / acid copolymer layer, polyethylene layer / ester copolymer layer, polypropylene layer / acid copolymer layer , Polypropylene layer / ester copolymer layer, or combinations of different types of polyethylene or different types of polypropylene It can be. The above-described combination can be achieved by a lamination method such as a sandwich lamination method using a T-die extruder, but may be a co-extruded film produced by a two-layer coextrusion method. Further, any of the combinations described above may be used as the unstretched resin layer 13.

  The bases 10 and 10 ′ may be provided with an intermediate layer and an outer layer on the inner layer 12 side of the base material layer 11 and the surface side of the base material layer 11 as necessary. As the intermediate layer, the synthetic resin film described in the base material layer 11, a film obtained by vapor-depositing an inorganic material such as aluminum or silicon oxide, an aluminum foil, or the like can be used. As the outer layer, As in the intermediate layer, the synthetic resin film described in the base material layer 11 or a film obtained by depositing an inorganic material such as aluminum or silicon oxide on these can be used. In short, the above-described layers may be appropriately provided depending on the performance required for the packaging bag. In addition, as a method for laminating each layer, a known laminating method such as a sandwich lamination method or a dry lamination method may be used as appropriate.

  The cut lines 5 and 5 ′ formed on the base body 10 ′ can be formed using a rotary die cutter provided with a cutting edge in the shape shown in FIG. 1. And in this invention, the space | interval of the said cutting line 5 of the opening start side and the opening start side edge of the said partition heat bonding part 4 is 1.0 mm or less, Preferably it is 0.5 mm or less, More preferably, it is 0. .2 mm or less. If the distance exceeds 1.0 mm, it may be difficult to open. For this purpose, the cutting line 5 is a single cutting line in FIG. 1, but considering the misregistration at the time of bag making, for example, multiple cutting lines at intervals of 0.5 mm, specifically, It is appropriate to use a three-thread cut line, and in the case of the partition thermal bonding part 4 as shown in FIG. 1, an interval of 0.5 mm is provided so as to sandwich the cut line 5 of the protruding part. Thus, two cut lines having a substantially “he” shape may be provided.

  Next, the present invention will be described in more detail with reference to the following examples. It should be noted that the description will be made using as much of the terms and symbols used in the description of the drawings and the like as possible.

[Production of Substrate 10 ']
12 μm thick biaxially stretched polyester film [manufactured by Toyo Metallizing Co., Ltd .: Barrier Rocks 1011HGCR (trade name)] was printed on the aluminum oxide vapor-deposited surface with a 130 mm pitch gravure printed, and then 15 μm thick A biaxially stretched nylon film is laminated by a dry lamination method, and then a coextruded film [linear low density polyethylene layer (30 μm) / polypropylene layer (50 μm)] having a thickness of 80 μm is formed on the surface of the biaxially stretched nylon film. A layered product was produced by laminating by a dry lamination method so that the layer was exposed. Thereafter, a cut line 5 having the shape and arrangement shown in FIG. 1 from the side of the coextruded film of the laminate, the interval being 6 mm, and the tip thereof being located in the linear low density polyethylene layer of the coextruded film. A base 10 ′ formed with a rotary die cutter was prepared while registering 5 ′ with a photoelectric tube mark. The linear low density polyethylene layer corresponds to the unstretched resin layer 13 described so far.
[Production of Substrate 10]
12 μm thick biaxially stretched polyester film [Toyo Metallizing Co., Ltd .: Barrier Rocks 1011HGCR (trade name)] has a 15 μm thick biaxially stretched nylon film and an 80 μm thick unstretched polypropylene film on the aluminum oxide deposition surface. Were sequentially laminated by a dry lamination method to produce a substrate 10.
[Production of packaging bags]
The base 10 and 10 'are formed by a combination bag making machine, and the side edge thermal bonding part 2 is 7 mm wide, the upper edge thermal bonding part 3 is 7 mm wide, and the partition thermal bonding part 4 is 5 mm wide. A packaging bag having a V-shaped notch 6 in the heat bonding part 2 and having no lower end edge heat bonding part 3 ′ having an outer dimension of 130 × 170 mm shown in FIG. 1 was produced.

[Production of Substrate 10 ′]
Gravure printing of black phototube marks at 130 mm pitch on the corona discharge treated surface of 12 μm thick biaxially stretched polyester film, followed by laminating 7 μm thick aluminum foil by dry lamination method, followed by the aluminum foil surface A co-extruded film of 80 μm thickness [linear low density polyethylene layer (30 μm) / polypropylene layer (50 μm)] was laminated by a dry lamination method so that the polypropylene layer was exposed to prepare a laminate. Thereafter, a cut line 5 having the shape and arrangement shown in FIG. 1 from the side of the coextruded film of the laminate, with an interval of 6 mm and a tip positioned on the linear low density polyethylene layer of the coextruded film. A base 10 ′ formed with a rotary die cutter was prepared while registering 5 ′ with a photoelectric tube mark. The linear low density polyethylene layer corresponds to the unstretched resin layer 13 described so far.
[Production of Substrate 10]
A substrate 10 was prepared by laminating a 7 μm thick aluminum foil and an 80 μm thick unstretched polypropylene film in this order on the corona discharge treated surface of a 12 μm thick biaxially stretched polyester film by a dry lamination method.
[Production of packaging bags]
The base 10 and 10 'are formed by a combination bag making machine, and the side edge thermal bonding part 2 is 7 mm wide, the upper edge thermal bonding part 3 is 7 mm wide, and the partition thermal bonding part 4 is 5 mm wide. A packaging bag having a V-shaped notch 6 in the thermal bonding portion 2 and having no lower end edge thermal bonding portion 3 ′ having an outer dimension of 130 × 170 mm shown in FIG.

[Production of Substrate 10 ′]
12 μm-thick biaxially stretched polyester film [manufactured by Toyo Metallizing Co., Ltd .: Barrier Rocks 1011HGCR (trade name)] was printed on the aluminum oxide deposition surface with a 130 mm pitch gravure printed, A biaxially stretched nylon film is laminated by the dry lamination method, and subsequently an isocyanate anchor agent is applied to the surface of the biaxially stretched nylon film, followed by T-die extrusion of low density polyethylene to a thickness of 30 μm on the anchor agent application surface. An unstretched polypropylene film having a thickness of 50 μm was pressed by a machine and laminated by a sandwich lamination method to produce a laminate. Thereafter, the cut lines 5 and 5 ′ having the shape and arrangement shown in FIG. 1 from the unstretched polypropylene film side of the laminate, the intervals of which are 6 mm, and the tips of which are located in the low-density polyethylene layer are connected to the phototubes. A base 10 ′ formed with a rotary die cutter was produced while registering with the marks. The low density polyethylene layer corresponds to the unstretched resin layer 13 described so far.
[Production of Substrate 10]
12 μm thick biaxially stretched polyester film [Toyo Metallizing Co., Ltd .: Barrier Rocks 1011HGCR (trade name)] has a 15 μm thick biaxially stretched nylon film and an 80 μm thick unstretched polypropylene film on the aluminum oxide deposition surface. Were sequentially laminated by a dry lamination method to produce a substrate 10.
[Production of packaging bags]
The base 10 and 10 'are formed by a combination bag making machine, and the side edge thermal bonding part 2 is 7 mm wide, the upper edge thermal bonding part 3 is 7 mm wide, and the partition thermal bonding part 4 is 5 mm wide. A packaging bag having a V-shaped cutout 6 in the thermal bonding portion 2 and having no 130 × 170 mm lower edge thermal bonding portion 3 ′ shown in FIG.

  The packaging bags of Examples 1 and 2 prepared above were filled with a commercially available retort curry from the opening, and then the opening was sealed with the lower edge thermal bonding part 3 ', and this was heat sterilized at 120 ° C for 30 minutes. Treated (retort sterilization). Further, 100 ml of water was filled in the packaging bag of Example 3 produced above from the opening, and the opening was sealed with the lower edge thermal bonding part 3 'and sterilized by boiling at 95 ° C for 30 minutes. Any packaging bag of Examples 1 to 3 could be sterilized without breaking the bag.

  Moreover, about the packaging bags of Examples 1 to 3, the V-shaped cutout 6 was used to cut the upper portion including the upper edge thermal contact portion 3 by tearing in parallel to the upper edge thermal contact portion 3, By opening the base body 10, 10 'of the packaging bag 1 with fingers and peeling it away from each other, it was possible to easily form an opening and take out the contents. In this series of opening operations, the fingers were not soiled and the contents did not sag.

  In the above description, the four-side seal type packaging bag constituted by two kinds of bases 10 and 10 'has been described as an example. However, the packaging bag may be constituted only by the base 10'. In addition, the present invention is not limited to the four-side seal type packaging bag, and the packaging bag of the present invention is, for example, all packaging bags in the category not departing from the gist of the present invention, such as the three-side seal type packaging bag and the standing type packaging bag It is included in the invention. Similarly, in the above description, the V-shaped notch has been described as an example of the opening means. However, the opening means is not limited to this, for example, the outer edge of the side edge thermal bonding portion 2. Or may be the opening cut illustrated in the background art section, or may be opened in any layer of the base body 10, 10 ′ constituting the packaging bag. A stretched film uniaxially stretched may be provided, or a combination of these may be used. In addition, if necessary, a synthetic resin occlusion tool (so-called chuck) for biting and sealing males and females between the upper edge thermal bonding part 3 and the partition thermal bonding part 4 is provided, and this is opened after opening. You may comprise so that it can reseal with an occlusion tool.

1 is a plan view schematically showing an embodiment of a packaging bag according to the present invention. It is an expanded sectional view of the XX line of FIG. It is a figure which illustrates the opening method of the packaging bag concerning this invention schematically.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Side edge thermal bonding part 3, 3 'Edge thermal bonding part 4 Partition thermal bonding part 5, 5' Cut line 6 Notch 10, 10 'Base | substrate 11 Base material layer 12 Inner layer 13 Unstretched resin layer

Claims (4)

A rectangular substrate having at least a base material layer and an inner layer made of a heat-adhesive resin, the inner layers are opposed to each other, and a side edge thermal bonding portion and a side edge heat are formed on a pair of opposite ends. A packaging bag having an edge thermal bonding portion at one edge orthogonal to the bonding portion and a substantially strip-shaped partition wall thermal bonding portion straddling the side edge thermal bonding portion on the edge thermal bonding portion side. The substrate constituting at least one surface of the packaging bag is provided with an unstretched resin layer adjacent to the surface of the inner layer on the base material layer side, and between the inner layer and the unstretched resin layer. The adhesive strength is configured to be peelable, and the score line penetrates the inner layer from the inner surface side along the partition wall thermal bonding portion in the vicinity of both end edges in a direction parallel to the side edge thermal bonding portion of the partition wall thermal bonding portion. Is formed on a base constituting the one surface. The packaging bag according to claim 1, wherein the inner layer and the unstretched resin layer are made of different resins. The packaging bag according to claim 1, wherein an adhesive strength between the inner layer and the unstretched resin layer is 0.2 to 5.0 N / 15 mm width. The packaging bag according to any one of claims 1 to 3, wherein a central portion of the partition thermal bonding portion protrudes toward the edge thermal bonding portion.

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