JP2008195453A - Plastic pouch having releasable sealing part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plastic pouch capable of preventing the separation of a partition section consisting of a releasable sealing part when filling up with contents in a multi-chamber pouch and when carrying out the distribution and the storage of the pouch sealed after being filled up with the contents, and also capable of blending by making the releasable sealing part communicate easily when using the pouch. <P>SOLUTION: The plastic pouch having the releasable sealing part composed of by heat heating a sealing material of a separate object from a back and front wrapper composing the pouch can obtain the plastic pouch having a communicable releasable sealing part by forming a spot-like unsealed section in the above releasable sealing part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a plastic pouch having a peelable seal portion. The plastic pouch of the present invention separates powder and liquid by a peelable seal portion and stores them in a storage chamber, presses the pressure seal during use to open the peelable seal portion, communicates the storage chamber and mixes the contents. It is suitably used as a multi-chamber pouch to be used. Moreover, when cooking with a microwave oven with the contents filled and sealed, it is used as a plastic pouch that releases an increase in internal pressure and prevents rupture.

A multi-chamber pouch partitioned by a peelable seal that can communicate with a plurality of storage chambers reacts and deteriorates when stored in a state where each component is mixed in advance, for example, medical infusion solution and its solution, powder for injection It is used to separate and store contents such as preparations and their solutions, seasonings, and mixed adhesives. These containers can be easily mixed without adjusting the mixing ratio at the time of use, and can prevent the introduction of foreign substances from the outside, so that the demand for various uses such as medical use is increasing. Things have been proposed. (For example, see Patent Documents 1 to 4)
No. 8-5708 Japanese Patent Laid-Open No. 11-227841 JP 2000-309350 A JP 2003-54621 A

In such plastic pouches, when the contents are separated by a peelable seal portion and filled in the respective storage chambers, or when the pouches sealed after filling the contents are distributed or stored, they can be peeled off by impact such as dropping. In addition to preventing separation and communication of the partition portion formed of the seal portion, it is required that when the pouch is used, the pouch is pressed so that the peelable seal portion is easily peeled and communicated to be mixed. However, it is difficult for the conventional plastic pouch to satisfy such conflicting requirements at the same time.
On the other hand, in the case of plastic pouches that are cooked in a microwave oven, the pressure during cooking of the contents can be easily released to prevent the contents from being scattered due to the bursting of the pouch, and to prevent contamination in the microwave oven. Is needed.

Therefore, the present invention solves these problems of the prior art, and comprises a peelable seal portion when filling the contents in the multi-chamber pouch, or when distributing or storing the pouch sealed after filling the contents. It is an object of the present invention to provide a plastic pouch capable of preventing separation of a partition part and capable of easily communicating and mixing a peelable seal part when the pouch is used.
Moreover, it aims at providing the plastic pouch provided with the simple means which prevents the burst at the time of heat-cooking the plastic pouch filled with the content with a microwave oven.

In the present invention, the following configurations 1 to 15 are adopted in order to solve the above problems.
1. In a plastic pouch having a peelable seal portion configured by heat-sealing a separate sealing material from the front and back packaging materials constituting the pouch, a spot-like unsealed portion is formed in the peelable seal portion. A plastic pouch having a peelable seal portion which can be communicated.
2. 2. The plastic pouch according to 1, wherein a plurality of the spot-like unsealed portions are provided in one row.
3. 2. The plastic pouch according to 1, wherein a plurality of the spot-like unsealed portions are provided.
4). 4. The plastic pouch according to any one of 1 to 3, wherein the peelable seal portion has a width of 4 to 15 mm.
5. 5. The plastic pouch according to any one of claims 1 to 4, wherein a distance from a side end portion of the peelable seal portion to an outer end portion of the spot-like unsealed portion is 0.5 to 4 mm.
6). 5. The plastic pouch according to any one of claims 1 to 4, wherein a length of the peelable seal portion in the width direction of the pouch is different on both sides of the seal portion.
7). One sealing surface of the sealing material is a tight seal portion firmly bonded to the inner surface of one packaging material constituting the pouch, and the other sealing surface of the sealing material is weaker than the inner surface of the other packaging material constituting the pouch. The plastic pouch according to any one of 1 to 6, which is a weak seal portion joined.
8). The sealing material is composed of three layers: a resin upper layer and a resin lower layer that constitute a seal portion with the pouch inner wall, and an intermediate layer that does not have heat sealability with the resin upper layer, and delamination between the resin upper layer and the intermediate layer The plastic pouch according to any one of claims 1 to 6, wherein the plastic pouch is peeled off.
9. The plastic pouch according to claim 8, wherein a meat reservoir is provided in the vicinity of an unsealed portion on the communication side between the inner wall of the pouch and the resin lower layer.
10. The plastic pouch according to any one of 1 to 9, wherein the plastic pouch is a multi-chamber plastic pouch having a plurality of storage chambers separated by the peelable seal portion.
11. A sub-chamber for storing solid matter is disposed on one side of the peelable seal portion with the peelable seal portion interposed therebetween, and a main chamber for storing a solution of the solid matter is disposed on the other side of the peelable seal portion. 11. The plastic pouch according to 10, wherein
12 12. The multi-chamber plastic pouch according to 11, wherein the sub chamber is formed by branching from a side wall of the main chamber, and the peelable seal portion is provided in the sub chamber.
13. 13. The plastic pouch according to 12, wherein the plastic pouch is a standing pouch.
14 14. The plastic pouch according to 13, wherein the bottom of the standing pouch is made of a transparent material.
15. The multi-chamber plastic pouch according to any one of claims 1 to 14, wherein a see-through window through which an inside can be seen is provided in at least one storage chamber of the plastic pouch.

According to the present invention, in a multi-chamber pouch that separates and stores powder and liquid, presses them during use, opens the peelable seal portion, communicates the storage chamber, and mixes the contents. When filling the contents, and during the distribution and storage of the pouch sealed after filling the contents, it is possible to prevent peeling of the partition part consisting of the peelable seal part, and when using the pouch, it can be pressed by fingers etc. A plastic pouch having a peelable seal portion that can be easily communicated can be obtained.
Also, in plastic pouches that are cooked in a microwave oven with the contents filled and sealed, a peelable seal that can easily connect the peelable seal portion to prevent bursts due to an increase in internal pressure during cooking. A plastic pouch having a part can be obtained.

Next, preferred embodiments of the present invention will be described in detail with reference to the drawings. When the plastic pouch of the present invention is configured as a multi-chamber pouch, the terms main chamber and sub chamber may be used, but these terms are merely used to distinguish a plurality of storage chambers. The terms “main” and “sub” do not represent the size relationship between the storage rooms.
1-4 is a figure which shows one example which applied this invention to the multi-chamber pouch, FIG. 1 is a top view which shows the state which opened the pouch before the contents filling, FIG. 2 is a pouch after the contents filling FIG. 3 is a cross-sectional view showing a state in which the multi-chamber pouch is folded after filling the contents. FIG. 4 is an enlarged schematic view of the peelable seal portion of the pouch.

In this multi-chamber pouch 1, a sub chamber 2 and a main chamber 3 are provided so as to be adjacent in the same plane, and the sub chamber 2 and the main chamber 3 are partitioned by a peelable seal portion 4. The multi-chamber pouch 1 is filled with the contents in the sub chamber 2 and the main chamber 3, and then bent as shown in FIG. 3 and fixed with the fixing portion 8 provided on the peripheral seal portion 6 to be transported and stored as it is. can do.
When the multi-chamber pouch is used, when the multi-chamber pouch 1 is expanded and the main chamber 3 is pressed (arrow 30) as shown in FIG. 2, the pressure is transmitted by the contents in the main chamber 3. As a result, the peelable seal 4 is broken, and the contents of the main chamber 3 flow into the sub chamber 2 to obtain a mixed solution of the contents stored in both chambers. The obtained mixed solution is led out from the spout 7.

In the peelable seal portion 4 of the multi-chamber pouch 1, as shown in FIG. 4, a plurality of spot-like unsealed portions 12, 12 are provided in one row.
Then, a sub chamber 2 for storing a solid material (not shown) is disposed on one side of the peelable seal portion 4, and a solution for the solid material is stored on the other side of the peelable seal portion 4. The chamber 3 is disposed, and by pressing the main chamber 3, the peelable seal portion 4 is peeled and the two chambers are communicated.
The peelable seal portion 4 of the plastic pouch according to the present invention is provided with such spot-like unsealed portions 12 in one row so that the main chamber 3 can be easily peeled when pressed. is there.

  Although the width | variety (W of FIG. 4) of the said peelable seal | sticker part 4 can be selected arbitrarily according to the size of a pouch and the kind of contents, Usually, it is preferable to set it as about 4-15 mm. Moreover, although the distance (L1, L2 of FIG. 4) from the side edge part of the said peelable seal part to the outer side edge part of a spot-like non-seal part can also be selected arbitrarily, it is usually 0.5-4 mm It is preferable to set the degree. Further, L1 is preferably narrower than L2.

The peelable seal portion 4 is preferably formed by heat-sealing the pouch wall materials 9 and 10 and a seal material 15 separate from these wall materials. One surface of the sealing material 15 forms a tight seal portion 16 that is firmly bonded to the wall material 9, and the other surface of the sealing material 15 forms an easily peelable sealing portion 17 that is bonded to the wall material 10 with a weak bonding force. (See FIG. 2).
In order to form a peelable seal portion having seal surfaces with different bonding forces in this way, for example, as shown in FIG. 5 which is an enlarged schematic view of the cross section of the seal material, a pouch inner wall is formed on one surface of the seal material 15. A two-layer sealing material 15 provided with the same kind of heat-sealable resin layer 25 and provided with a different kind of heat-sealable resin layer 26 on the other surface is used. Thereby, when the inner wall of the pouch and the sealing material 15 are heat-sealed, the one surface 25 of the sealing material 15 forms the inner wall of the pouch and the tight seal portion 16, and the other surface 26 forms the easily peelable seal portion 17 that easily peels at the interface. To do.

  In addition, as seen in FIG. 6 which is a schematic enlarged cross-sectional view of the sealing material 15, for example, a resin layer having heat sealability with the inner wall of the pouch is provided on both sides (reference numerals 25 and 27), as shown in FIG. The intermediate layer 26 may be a resin layer that does not have heat sealability with the resin layers 25 and 27. In this case, when a peeling force is applied, it will be peeled off by delamination between at least one resin layer of the resin layers 25 and 27 and the intermediate layer 26. It is preferable to appropriately select the materials of the resin layers 25 and 27 and the intermediate layer 26 so that delamination occurs between any one of the resin layers 25 and 27 and the intermediate layer 26.

FIG. 7 is a schematic diagram for explaining an example of the cross-sectional structure of the peelable seal portion 4. FIG. 7A is a view of heating the sealing material 15 illustrated in FIG. 6 constituting the inner wall of the pouch and the peelable seal portion 4. It is a figure explaining the process of sealing and forming the peelable seal | sticker part 4. FIG. Moreover, the figure (B) is a figure explaining the state which the peelable seal | sticker part 4 peels.
In this example, as shown in FIG. 7A, when heat sealing the inner wall of the pouch and the sealing material 15 constituting the peelable seal portion 4 from the tight seal portion 16 side, the pouch is increased by increasing the heat seal pressure. The wall material 9 of the wall material 9 is formed in the sealing material unsealed portion 22 on the communication side (the side on which the peeling force acts) between the wall material 9 and the resin lower layer 27. . And as shown in FIG.7 (B), by forming this pool 20, the interface peeling of the wall material 9 of the pouch and the resin lower layer 27 is prevented, and the stress for peeling the peelable seal portion 4 is It acts between the pouch wall material 10 and the resin upper layer 25 of the peelable seal portion 4, and the interface peeling between the resin upper layer 25 and the intermediate layer 26 can be easily performed.
The sealing material unsealed portion 22 uses both the sealing material 15 and the width W (see FIG. 4) of the sealing portion of the peelable seal portion 4 when the peelable seal portion 4 is formed by heat sealing. Formed on the outer side. By leaving the seal material unsealed portion 22, the peelable seal portion 4 can be easily and reliably formed.

  In the present invention, the peelable seal portion 4 is configured as described above, so that when the contents are filled into the storage chamber of the multi-chamber pouch, or when the pouch sealed after filling the contents is distributed or stored. It is possible to prevent separation of the partition portion made of the peelable seal portion, and to easily communicate the peelable seal portion when using the pouch and to mix the contents stored in the main chamber 3 and the sub chamber 2. A plastic pouch can be obtained.

The plastic pouch of the present invention is composed of a single-layer or multi-layer plastic film. However, the plastic film to be used is not particularly limited, and any of those usually used for a pouch can be used, but at least as an inner layer. A plastic film having a heat-sealable resin layer is used.
Examples of plastic materials suitable for constituting the plastic film include crystalline polypropylene, crystalline propylene-ethylene copolymer, crystalline polybutene-1, crystalline poly-4-methylpentene-1, low-, medium-, Or polyolefins such as high-density polyethylene, ethylene-vinyl acetate copolymer (EVA), EVA saponified product, ethylene-ethyl acrylate copolymer (EEA), ion-crosslinked olefin copolymer (ionomer); polystyrene, styrene- Aromatic vinyl copolymers such as butadiene copolymers; vinyl halide polymers such as polyvinyl chloride and vinylidene chloride resins; polyacrylic resins; acrylonitrile-styrene copolymers, acrylonitrile-styrene-butadiene copolymers, etc. Nitrile polymer; nylon 6, nylon 6. Polyamides such as para or metaxylylene adipamide; polyesters such as polyethylene terephthalate and polytetramethylene terephthalate; various polycarbonates; fluororesins; thermoplastic resins such as polyacetals such as polyoxymethylene it can.

Examples of heat-sealable plastic materials include known low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, and ethylene-based materials. Olefin resins such as olefin resins graft-modified with unsaturated carboxylic acids or anhydrides thereof, polyamides or copolyamide resins having a relatively low melting point or a low softening point, polyesters or copolyester resins, polycarbonate resins or the like are used.
Films made of these plastic materials are used as unstretched or uniaxially or biaxially stretched films.

The plastic film used in the pouch of the present invention can be constituted by a single layer or a laminate of two or more of these plastic films, and one or more of these plastic films and aluminum It can also be configured by laminating a metal foil such as paper, cellophane and the like.
In particular, in the case of contents that require gas barrier properties, it has a resin layer such as polyvinylidene chloride resin, EVA saponified product, nylon or cyclic olefin copolymer, and a deposited film of metal oxide such as aluminum oxide or silicon oxide. It is preferable to use a laminated film including a resin layer and a metal foil such as aluminum. When manufacturing these laminated films, an anchoring agent made of an epoxy resin, a urethane resin, a polyethyleneimine resin, or the like can be interposed between the respective layers as necessary.

In order to give rigidity and heat insulation to the film constituting the pouch, it is also possible to use films made of foams of various synthetic resins. In addition, additives such as titanium oxide, calcium carbonate, and carbon can be added to various synthetic resins. A filled film can also be used. Whether the plastic film is a single layer or what kind of layer configuration it may be selected according to the properties of the contents filled in the pouch.
The plastic film can be produced by a usual method such as a casting method, a T-die method, a calendar method, or an inflation method. The laminated film can be produced by a conventional method such as dry lamination of a film formed in advance, coating on a base film, melt coextrusion or the like.

Next, another embodiment of the plastic pouch of the present invention will be further described with reference to the drawings.
8 to 10 are views showing other examples of the plastic pouch of the present invention, FIG. 8 is a perspective view of the pouch, FIG. 9 is a longitudinal sectional view of the pouch after filling the contents, and FIG. 10 is a peelable seal. It is a longitudinal cross-sectional view explaining the state which opens the part 4. FIG.
This pouch 21 is a kind of so-called standing pouch, and the pouch is made self-supporting when the contents are filled by heat-sealing the bottom member 19 constituting the bottom of the pouch to the pouch side wall.
In this pouch 21, the sub chamber 2 is formed as a small chamber branched by extending the side wall of the main chamber 3 constituting the pouch body outward, and is located near the branch portion 5 in the sub chamber 2 as in FIG. 4. The peelable seal portion 4 is provided. At the center of the front end of the sub chamber 2, a spout 7 made of a plug for pouring the contents when the pouch 21 is used is provided.

The main chamber 3 and the sub chamber 2 are filled with liquid contents. The contents of the main chamber 3 are filled from the top 18 of the pouch and sealed by heat sealing. The side of the sub chamber 2 may be filled from the plug body 7, or an unsealed portion may be provided on the side edge portion and filled from there. Further, after filling the contents from the end of the sub chamber 2, the plug serving as the spout 7 may be attached by heat sealing.
In the pouch 21, the bottom member 19 is made of a transparent plastic material so that the inside of the pouch can be seen through. Instead of using the transparent bottom member 19, or together with the transparent bottom member 19, a see-through window that allows the inside to be seen through may be provided in the main chamber 3 or the sub-chamber 2 of the pouch.

  When the pouch 1 is used, as shown in FIG. 10, the sub chamber 2 along the main chamber 3 is opened to the top 18 side of the pouch with the branch portion 5 as a fulcrum, and the top of the pouch is reversed. 18 is bent along the main storage chamber 3 side and placed on a flat table. In this state, when the main chamber 3 of the pouch is crushed by hand, the main chamber 3 and the sub chamber 2 are linear, so that the internal pressure of the main chamber 3 is applied to the end of the peelable seal portion 4 as a peeling force. Acting, the peelable seal portion 4 is peeled, the main chamber 3 and the sub chamber 2 communicate with each other, and the contents are mixed.

FIG. 11 is a perspective view showing still another example of the plastic pouch of the present invention. In this pouch 31, the spout 7 is provided at the top 18 of the pouch 31 in the pouch 21 of FIGS. Other configurations of the pouch 31 are the same as the pouch 21.
In this pouch 31, the main chamber 3 is pressed to peel the peelable seal portion 4, and the solid material stored in the sub chamber 2 is dissolved by the solution stored in the main chamber 3, and then the spout made of spout is used. 7 is poured out. The pouch 31 contains a powdery or granular supplement in the sub chamber 2 and the solution in the main chamber 3, and the peelable seal portion 4 is peeled off from the main chamber 3 side to dissolve the supplement. After that, the dissolved liquid is suitably used as a pouch for drinking from the spout 7.

FIG. 12 is a perspective view showing an example in which the plastic pouch of the present invention is applied to a microwave cooking pouch.
This plastic pouch 41 is configured as a standing pouch having one storage chamber 3, and a peelable seal portion 4 similar to that shown in FIG. 4 is provided at the top of the storage chamber 3. A plurality of spot-like unsealed portions 12 are provided in one row. An unsealed portion 2 ′ is provided between the peelable seal portion 4 and the peripheral edge seal portion 6 on the upper edge. The unsealed portion 2 ′ has a perforation for opening the pouch, score processing, laser processing, etc. The easy opening process part 29 by is formed.

In order to cook the contents by heating the pouch 41 with a microwave oven, the pouch is opened with the fingers or the like from the easy-opening processing unit 29, and then the pouch is cooked with a microwave oven. When the internal pressure of the pouch rises and reaches a certain pressure due to water vapor generated from the contents as it is heated, the peelable seal 4 is peeled off from the storage chamber 3 side and the pouch is opened, and the internal pressure is released. And the cooking of the contents is completed.
In this pouch 41, the peelable seal portion 4 automatically opens as the internal pressure of the pouch increases, so that the pouch can be prevented from rupturing and the contents being scattered. Moreover, since the inside of the pouch is kept in a sealed state until the internal pressure reaches a certain pressure, the taste of the contents is improved by the steaming effect.

FIG. 13 is a schematic view showing another example of a peelable seal portion that can communicate with the plastic pouch of the present invention.
This peelable seal portion 4 ′ is provided with two rows of spot-like unsealed portions 12 in the peelable seal portion 4 of FIG. 4, and adjacent rows of unsealed portions 12 overlap in the width direction of the peelable seal portion 4. It is arranged so that it does not become. The other configuration of the peelable seal portion 4 ′ is the same as that of the peelable seal portion 4 in FIG.
In this example, although not shown, the unsealed portions 12 in adjacent rows may be arranged so as to overlap in the width direction of the peelable seal portion 4 ′.

FIG. 14 is a schematic view showing still another example of a peelable seal portion which can be communicated with the plastic pouch according to the present invention.
This peelable seal portion 4 ″ is obtained by increasing the number and density of spot-like unsealed portions 12 in the peelable seal portion 4 ′ of FIG. 13. Other configurations of the peelable seal portion 4 ″ are as follows. This is the same as the peelable seal portion 4 ′ in FIG.

EXAMPLES Next, the present invention will be further described with reference to examples, but the following specific examples are not intended to limit the present invention.
1. Branching type pouch As a packaging material constituting a pouch, a multilayer in which a biaxially stretched polyethylene terephthalate film (12 μm), a biaxially stretched nylon film (15 μm), and a linear low density polyethylene film (70 μm) are laminated with a urethane-based adhesive A film was used.
In addition, as a sealing material constituting the easily peelable seal portion, an upper layer A (10 μm) made of a blend of propylene-ethylene-butene terpolymer, low density polyethylene and linear low density polyethylene, propylene ethylene random copolymer. An intermediate layer B (30 μm) comprising a blend of a polymer and a linear low density polyethylene, a blend of a propylene ethylene random copolymer and a linear low density polyethylene having a higher blend ratio of the linear low density polyethylene than the intermediate layer B A tape-like film piece having a width of 15 mm made of a lower layer C (10 μm) made of a product and a three-layer film (aroma film TLP5 manufactured by Okamoto Co., Ltd.) having a total thickness of 50 μm was used.
Then, the packaging material and the sealing material on the front and back of the pouch are heat sealed to have a spout at the top of the main chamber, the sub chamber is branched from the side wall of the main chamber, and the easily peelable seal portion is near the branch portion of the sub chamber The standing pouch shown in FIG.

2. Measurement, test (1) Opening force measurement A branch type pouch filled with 400 g of water and 50 g of flour in the sub chamber 2 is prepared in the main chamber 3 of the produced plastic pouch, and the main chamber is such that the pouch 7 is on the upper surface. And open the subchamber and place it horizontally on the table. Then, using a Tensilon type testing machine (UCT-5T manufactured by TS Engineering Co., Ltd.), an iron disk having a diameter of 90 mm and a thickness of 10 mm was placed at the approximate center position of the main chamber 3 and pressed at a speed of 300 mm / min. An upper layer A comprising a blend of propylene-ethylene-butene terpolymer, low-density polyethylene and linear low-density polyethylene, and a propylene-ethylene random copolymer, The maximum load until the intermediate layer B made of a blend of linear low density polyethylene was completely delaminated was measured, and this was defined as the opening force (N).
The number of measurements was 5 bags each, and the average value was measured.
Moreover, the reference | standard of the said opening force (N) 250-350N which is the result of having measured the opening force about the commercially available two-chamber infusion bag which has the shape shown in FIG. 1, and provided the conventional peelable seal part, and From the description that the average value of the pressing force that the person continuously pushes down in the standing posture for about 3 seconds is about 250 N [Matsushita Electric Engineering Technical Report 21 (1980)], the target value of the opening force of the pouch was set to 200 N or less.

(2) Drop test The plastic pouch was dropped horizontally on a concrete surface from a height of 120 cm above the ground at a room temperature of 5 ° C. with the main chamber and the sub chamber folded. While repeating this 10 times, the presence or absence of peeling of the peelable seal portion was visually observed and evaluated according to the following criteria.
・ No peeling of peelable seal part: ○
-The peelable seal part is partially peeled and partly retracted: △
・ Peelable seal part is completely peeled: ×
In this drop test, the number of plastic pouches tested was 5 bags each, and even if one bag had a releasable or complete peeling of the peelable seal portion, Δ and x respectively.

3. Evaluation (opening evaluation)
A branch type pouch filled with water in the main room and flour in the sub room was stored at 5 ° C., and then the opening evaluation was performed. The opening evaluation is based on a qualitative evaluation by five monitors, and five monitors (female: four, male: one) in an environment of 27 ° C. are sitting on a chair in the main room and vice versa of the plastic pouch. The chamber was opened, the pouch was placed on the table with the main chamber facing upward, and the main chamber was pressed with both hands to evaluate the opening.
The opening evaluation was performed using a 10-point evaluation of the ease of opening of the peelable seal portion of the branched pouch, and the evaluation was performed using an average value of five monitors with the highest score.

[Example 1]
The shape of the peelable seal portion 4 of the plastic pouch is the shape shown in FIG. 4. The width W of the peelable seal portion is 6 mm, the length X is 90 mm, and the spot-like unsealed portion 12 is formed from the end of the peelable seal portion. L1 and L2 to the outer end portion: 1 mm each, length of one side S: 4 mm square spot-shaped unsealed portions 12 are prepared at equal intervals, and a plastic pouch is filled with the contents. Then, measurement, test and evaluation were performed.

[Example 2]
A plastic pouch similar to that of Example 1 except that the distances L1 and L2 from the peelable seal part side end of the pouch peelable seal part 4 to the outer end part of the spot-like unsealed part 12 are 2 mm each, Measurements, tests and evaluations were performed.

[Example 3]
The shape of the peelable seal portion of the plastic pouch is the shape shown in FIG. 13, and the spot-shaped unsealed rectangular width W of the peelable seal portion is 6 mm, the long side length is 4 mm, and the short side length is 2 mm. Measurement, testing, and evaluation were performed using the same plastic pouch as in Example 1 except that four parts 12 were provided at equal intervals on the main chamber 3 side and three on the sub chamber 2 side.

[Example 4]
The shape of the peelable seal portion of the plastic pouch is the shape shown in FIG. 14, and the spot-shaped unsealed rectangular width W is 8 mm, the long side length is 4 mm, and the short side length is 2 mm. Example 12 is the same as in Example 1 except that a gap of 2 mm is formed in the width W direction of the easily peelable seal portion and 8 pieces are provided at the main chamber 3 side and 7 pieces are provided at the sub chamber 2 side at equal intervals. A plastic pouch was used for measurement, test and evaluation.

[Comparative Example 1]
Measurement, test, and evaluation were performed with the same pouch as in Example 1 except that the peelable seal part 4 of the plastic pouch had a width W of 6 mm and a length X of 90 mm and no spot-like unsealed part was provided. .

[Comparative Example 2]
Measurement, test and evaluation were performed with the same pouch as in Example 1 except that the peelable seal part 4 of the plastic pouch had a width W of 8 mm and a length X of 90 mm, and no spot-like unsealed part was provided. .

  Table 1 shows the results of measurements, tests and evaluations for the plastic pouches obtained in the examples and comparative examples.

  According to Table 1, it was found that the plastic pouch of the present invention was excellent in drop strength (impact resistance) even though the peelable seal portion was easy to open and the opening force was low.

It is a top view which shows an example of the plastic pouch of this invention. It is a cross-sectional schematic diagram which shows the state which filled the content in the pouch of FIG. It is a cross-sectional schematic diagram which shows the state which filled the content in the pouch of FIG. 1, and was bent. It is an expansion schematic diagram of the peelable seal part of the pouch of FIG. It is a cross-sectional schematic diagram which shows an example of the separate sealing material which comprises a peelable seal part. It is a cross-sectional schematic diagram which shows the other example of the separate sealing material which comprises a peelable seal part. It is a cross-sectional schematic diagram which shows the state which heat seals the sealing material which comprises a pouch inner wall and a peelable seal part, and the state from which a peelable seal part peels. It is a perspective view which shows an example which applied this invention to the standing pouch. It is a longitudinal cross-sectional view which shows the state which filled the content in the pouch of FIG. It is sectional drawing which shows the state which opens the peelable seal part of the pouch of FIG. It is a perspective view which shows the other example which applied this invention to the standing pouch. It is a perspective view which shows an example which applied this invention to the pouch for microwave ovens. It is a schematic diagram which shows the other example of the peelable seal | sticker part which can be communicated formed in the plastic pouch of this invention. It is a schematic diagram which shows the other example of the peelable seal | sticker part which can be communicated formed in the plastic pouch of this invention.

Explanation of symbols

1,21,31,41 Plastic pouch 2 Sub chamber 2 'Unsealed part 3 Main chamber
4,4 ', 4 "peelable seal part 5 turn-up part 6 peripheral seal part 7 spout 8 fixing part
9,10 Wall material 12 Spot-like unsealed portion 15 Seal material 16 Tight seal portion 17 Easy peelable seal portion 18 Pouch top portion 19 Bottom member 20 Meat reservoir 23 Heat seal direction
25,26,27 Heat-sealable resin layer 29 Easy-open process part

Claims (15)

  In a plastic pouch having a peelable seal portion configured by heat-sealing a separate sealing material from the front and back packaging materials constituting the pouch, a spot-like unsealed portion is formed in the peelable seal portion. A plastic pouch having a peelable seal portion which can be communicated.   2. The plastic pouch according to claim 1, wherein the spot-like unsealed portions are provided in a plurality of rows.   The plastic pouch according to claim 1, wherein the spot-like unsealed portions are provided in a plurality of rows.   The plastic pouch according to any one of claims 1 to 3, wherein the peelable seal portion has a width of 4 to 15 mm.   The plastic pouch according to any one of claims 1 to 4, wherein a distance from a side end portion of the peelable seal portion to an outer end portion of the spot-like unsealed portion is 0.5 to 4 mm.   The plastic pouch according to any one of claims 1 to 4, wherein the length of the peelable seal portion in the width direction of the pouch is different on both sides of the seal portion.   One sealing surface of the sealing material is a tight seal portion firmly bonded to the inner surface of one packaging material constituting the pouch, and the other sealing surface of the sealing material is weaker than the inner surface of the other packaging material constituting the pouch. The plastic pouch according to any one of claims 1 to 6, wherein a weak seal portion is joined.   The sealing material is composed of three layers: a resin upper layer and a resin lower layer that constitute a seal portion with the pouch inner wall, and an intermediate layer that does not have heat sealability with the resin upper layer, and delamination between the resin upper layer and the intermediate layer The plastic pouch according to any one of claims 1 to 6, wherein the plastic pouch is peeled off.   The plastic pouch according to claim 8, wherein a meat reservoir is provided in the vicinity of an unsealed portion on the communication side between the inner wall of the pouch and the resin lower layer.   The plastic pouch according to any one of claims 1 to 9, wherein the plastic pouch is a multi-chamber plastic pouch having a plurality of storage chambers separated by the peelable seal portion.   A sub-chamber for storing solid matter is disposed on one side of the peelable seal portion with the peelable seal portion interposed therebetween, and a main chamber for storing a solution of the solid matter is disposed on the other side of the peelable seal portion. The plastic pouch according to claim 10.   The multi-chamber plastic pouch according to claim 11, wherein the sub chamber is formed by branching from a side wall of the main chamber, and the peelable seal portion is provided in the sub chamber.   The plastic pouch according to claim 12, wherein the plastic pouch is a standing pouch.   The plastic pouch according to claim 13, wherein the bottom of the standing pouch is made of a transparent material.   The multi-chamber plastic pouch according to any one of claims 1 to 14, wherein a see-through window through which an inside can be seen is provided in at least one storage chamber of the plastic pouch.

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