JPH10147352A - Plastic container with fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic container with a fastener which exhibits excellent filling properties, seal opening properties and resealability even when the content is liq. and also exhibits excellent pressure resistance and in which a large amt. of content can be filled and which has excellent transportation stability and storage stability. SOLUTION: This plastic container is provided with a flexible container main body 21 and a sheet 12 for sealing provided in the container main body 21 and on the inlet part of the container main body 21, one side 11-b of the container main body 21 and the sheet 12 for sealing can be opened and closed with a fastener 15 and another side 11-a of the container main body 21 and the sheet 12 for sealing are sealed and the one side 11-b of the container main body 21 and the sheet for sealing 12 are bonded through easily releasable bonding parts 13 and 14 on more inner side and/or outer side than the fastener 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to food and drink, pharmaceuticals,
It relates to a plastic container with a chuck that can be used for general packaging materials such as stationery, mechanical parts, electronic parts, etc.
More specifically, the present invention is excellent in filling property, opening property, resealing property and excellent pressure resistance even if the contents are liquid, so that a large amount of contents can be filled and transported. The present invention relates to a plastic container with a chuck having excellent stability and storage stability.

[0002]

2. Description of the Related Art Conventionally, plastic containers with zippers have been used.
When filling the contents, for example, liquid, with an automatic filling machine, first heat seal the inlet of the container while leaving the bottom of the container open to complete the sealing of the package and protect the chucking part. After filling the contents from the bottom, a step of further heat-sealing the bottom is performed. At the entrance, a notch for cutting scissors is provided on the upper part of the heat seal, a perforation is provided, or a tearing tape is incorporated to facilitate opening.

As described above, when filling the contents into a conventional plastic container with a chuck, the contents are prevented from adhering to the chuck or being caught in the female hooks of the chuck, and When the material is sticky or perishable and is colored, the contents must be filled from the bottom of the container so as not to stain the chuck portion and deteriorate the quality of the container.

On the other hand, large-capacity plastic containers such as gusset bags, standing pouches, and paper packs laminated with a thermoplastic resin cannot be filled from the bottom due to structural problems at the bottom, and the contents cannot be filled from the inlet side of the container. , And it has hardly been used as a plastic container with a chuck due to contamination of the chuck. Therefore, most conventional plastic containers with zippers are flat bags that are small in capacity.

[0005] Further, in an easily-openable container having no chuck, the inlet portion is easily opened by the internal pressure, and there are problems in transportation stability, storage stability, and the like, and there is a limitation in use.
In particular, this phenomenon is remarkable in a large-capacity container having a large ratio of internal volume / packaging material area, and it is difficult to achieve both durability against internal pressure and easy opening.

[0006] Therefore, a large capacity such as a gusset bag, a standing pouch or a paper pack, etc.
Despite the large packaging material area ratio, there is a need for a zippered plastic container that is easy to open and that can be resealed, and that is difficult to undesirably open the inlet due to internal pressure.

[0007]

SUMMARY OF THE INVENTION According to the present invention, even if the contents are liquid, they are excellent in filling property, opening property, resealing property and pressure resistance. An object of the present invention is to provide a zipper-equipped plastic container which is excellent in transport stability and storage stability.

[0008]

Means for Solving the Problems As a result of intensive studies, the present inventors were able to solve the above-mentioned conventional problems.

That is, the present invention comprises a flexible container main body and a sealing sheet provided inside the container main body, wherein one of the container main bodies is connected to the sealing main body at an entrance of the container main body. The sheet can be opened and closed by a plastic chuck, the other of the container body and the sealing sheet are sealed, and one of the container body and the sealing sheet are closer to the inside of the container than the plastic chuck. Are provided with a plastic container with a zipper joined by an easily peelable joint.

[0010] The present invention also includes a flexible container main body, and a sealing sheet provided inside the container main body,
At the entrance of the container body, one of the container body and the sealing sheet can be opened and closed by a plastic chuck, and the other of the container body and the sealing sheet are sealed, and Another object of the present invention is to provide a plastic container with a chuck in which one of the container main body and the sealing sheet are joined by an easily peelable joint on the outside of the container.

Further, the present invention comprises a flexible container main body, and a sealing sheet provided inside the container main body,
At the entrance of the container body, one of the container body and the sealing sheet can be opened and closed by a plastic chuck, and the other of the container body and the sealing sheet are sealed, and Another object of the present invention is to provide a plastic container with a chuck in which one of the container main body and the sealing sheet are joined by an easily peelable joint on the outer and inner sides of the container.

Further, the present invention provides the above-mentioned plastic container with a chuck, wherein the easily peelable joint is provided in parallel with the plastic chuck.

The present invention also provides a plastic chuck,
An object of the present invention is to provide the above-mentioned plastic container with a chuck, wherein a tear line is provided between one of the container body and a seal between the sealing sheets.

Further, the present invention provides the above-mentioned plastic container with a chuck, wherein the distance between the plastic chuck and the easily peelable joint on the inner side or the outer side of the plastic chuck is at least 0.5 mm. To provide.

Still further, according to the present invention, the other side of the container body and the sealing sheet are on the content side (below) of the easily peelable joint on the inner side or outer side of the container with respect to the plastic chuck.
The above-mentioned plastic container with a zipper is sealed at least 2 mm from the end of the container at the container outlet side (above).

The present invention also provides the above-mentioned plastic container with a zipper, wherein the plastic container with a zipper is a gusset bag, a standing pouch, or a laminated paper pack.

Further, the present invention provides a method of filling the contents between the other sheet and the sealing sheet of the plastic container body with a chuck, and sealing the other sheet and the sealing sheet. The present invention provides a method for filling contents into a plastic container with a chuck.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The material used for the container of the present invention is usually the same material as a plastic chuck (hereinafter simply abbreviated as "chuck") or a plastic sheet having good adhesion to the same. Can be Although not limited, generally used thermoplastic resins such as low-density polyethylene, high-density polyethylene, polypropylene, polyester, polyamide, and polyvinyl chloride are used. Depending on the size and purpose of the container, these plastic sheets may be laminated, the sheet may be laminated with paper or aluminum foil, or a metal or metal oxide may be deposited on the sheet. used.

As the form of the container, one having a large capacity and a large ratio of the inner volume to the area of the packaging material, for example, a gusset bag, a standing pouch, a flat bag, or a paper pack obtained by laminating a resin on paper is preferably employed in the present invention. Is done. In the container of the present invention, the thicknesses of the container body and the sealing sheet depend on the size of the container and the purpose of use, and are appropriately selected.

An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an enlarged cross-sectional view of an inlet portion in an embodiment of the container (standing pouch) of the present invention (an easily peelable joint is provided on the outside and inside of the container with respect to the plastic chuck). FIG.
It is sectional drawing of the standing pouch of FIG.

In FIGS. 1 and 2, the container body 21 is
One flexible sheet 11-b and the other sheet 11-a are provided, and a male claw in the chuck 15 is provided on one sheet 11-b of the container body over the entire width of the container. The female claw to be provided is provided on the sealing sheet 12. Conversely, a female claw may be provided on 11-b, and a male claw may be provided on the sealing sheet 12. The sheet 12 for sealing is made of the sheets 11-a and 11-
-B, and extends downward toward the container inner side (container contents side). One sheet 11- of the container body
An easily peelable joint portion 14 is provided below the chuck 15 (inside the container) between b and the sealing sheet 12. It is preferable that the easily peelable joining portion 14 is formed in parallel with the chuck. Also, the chuck 15
Above (outside of the container), an easily peelable joint portion 13 can be provided there, which is also a preferable embodiment. Note that, as shown in FIG. 3, only the easily peelable joint 13 may be provided above the chuck 15 without the joint 14. Conversely, as shown in FIG. 4, only the joint 14 may be provided without providing the joint 13. This easily peelable joint 14 or 13, or 13 and 14
For example, a heat-sealing resin can be provided at a desired location by part coating, coextrusion, or the like. As the heat-sealing resin, any known type can be used as long as the adhesive strength is not so high, and an interface peeling type, a cohesive failure type, or the like may be used alone or in combination. .

As the heat-sealing resin, an ethylene-vinyl acetate copolymer, a vinylidene chloride resin, a modified polypropylene resin, a modified polyethylene resin and the like can be used.

Here, the easily peelable joint 13 or 1
4, or 13 and 14 are 0.5m from chuck
m or more, preferably 1 mm or more. If it is less than 0.5 mm, the chuck may be affected by heat and may be deformed. The width of the easily peelable joint 13 or 14 or 13 and 14 is 2 mm.
The above is preferred.

After the contents are filled in the container, the upper portion A of the sheet 11-a and the upper portion B of the sealing sheet 12 are connected to each other at an easily peelable joint portion 14 in consideration of durability against internal pressure. At least 2 mm from the end of the contents side (lower) of
Sealed on the outlet side (upper). When only the easily peelable joining portion 13 is provided and the joining portion 14 is not provided, AB
The seal between them is sealed on the outlet side (above) at least 2 mm from the end on the content side (below) of the joint 13.

As described above, in the container of the present invention, the contents can be filled from between the upper part A of the sheet 11-a and the upper part B of the sealing sheet 12, so that even if the contents Even if the liquid is sticky, the chuck is kept closed, so that the chuck portion is not contaminated. Further, the contents side (downward) of the chuck 15
However, if the contents are protected by the easily peelable joint portion 14, the contents do not directly touch the chuck 15 after sealing. As a result, a container having excellent transport stability, storage stability, and the like, and durability against internal pressure can be obtained. The seal between the upper part A of the sheet 11-a and the upper part B of the sealing sheet 12 is not particularly limited, but it is efficient to perform heat sealing. Industrially, this sealing can be done as an automatic packaging line.

When the container thus sealed is opened, a chuck 15 between the sheet 11-b of the container body and the sealing sheet 12 is not required without using an instrument such as scissors.
It can be easily performed by peeling off the easily peelable joints 13 and / or 14. In the present invention, the flap 16 and the like can be formed above the easily peelable joint 13 as necessary.

Another embodiment of the present invention is shown in FIG. FIG.
FIG. 3 is a sectional view of a standing pouch of the present invention provided with a tear line. In FIG. 5, instead of the easily peelable joint 13 at the upper part, the joint is changed to a joint 13 'that cannot be peeled or is difficult. This joint 13 'can be formed by a known means such as heat sealing. In this embodiment, a tear line 17 may be provided between the chuck 15 and the joint 13 '. When providing this tear line 17,
It is preferable that the sheet 11-b of the container body is uniaxially stretched so as to impart orientation so that the sheet 11-b is easily torn. Apart from this, various means such as providing a notch for tearing, perforating, or inserting a tape for tearing are also applicable.

FIG. 6 shows still another embodiment of the present invention. FIG. 6 is a sectional view of another standing pouch of the present invention provided with a tear line. In FIG. 6, the sealing sheet 12 is used by folding back and using the sheet 11-b of the container body. Also in this case, the tear line 17 can be provided above the chuck 15.

In the container of the embodiment shown in FIG. 5 or FIG. 6, the location of the inlet portion of the container body to be sealed after the contents are filled may be located above the tearing line. 11-a, 11-b
Since three sheets of the sealing sheet 12 can be heat-sealed at a time, efficient sealing can be achieved.

The conventional large-capacity simple plastic container, for example, a gusset bag, a standing pouch, a laminated paper pack, or the like has a complicated bottom portion of the container, and the contents cannot be filled from there. Therefore, conventional large-capacity plastic containers have to be filled with the contents from the container entrance side, and plastic containers provided with resealable chucks are almost practically used due to contamination of the chucks. Did not.

In the present invention, by applying the sealing sheet 12 and keeping the chuck in the engaged state, or by further providing the easily peelable joint 14 on the content side of the chuck 15, Complete protection of the chuck 15,
The contents can be filled from the inlet side of the container.

Further, A of the sheet 11-a and B of the sealing sheet 12 are sealed at least 2 mm from the end of the content side of the easily peelable joint portion 14 or 13 on the outlet side (above). , The durability of the container against the internal pressure is found to be further increased. Although the reason could not be clarified, when the distance is less than 2 mm, the internal pressure may directly act on the easily peelable joint 13 or 14, whereas when the distance is 2 mm or more, the internal pressure becomes A It is presumed that the seal is directly applied to the portion between -B and the stress on the easily peelable joint 13 or 14 is significantly reduced.

[0033]

The present invention will be further described below with reference to examples and comparative examples. (Example 1) A plastic container with a chuck as shown in FIG. 1 was produced. This container has a width of 140 mm and a height of 15
It was a 0 mm standing pouch, and a plastic chuck as shown in FIG. 1 was provided on the entrance side. The material of the sheets 11-a and 11-b of the container body is 12
μm polyester, 15μm polyamide and 60μm
This is a laminate of a non-stretched polypropylene film, and the layers are adhered to each other using a two-component curable urethane dry laminate adhesive for retort. The sheet for sealing is a laminate of a film of 60 μm unstretched polypropylene, 12 μm polyester, 15 μm polyamide and 60 μm unstretched polypropylene, and the bonding between the layers is similarly performed using a two-component curable urethane dry laminate adhesive. Dry lamination was performed. On one sheet of the container body, 11-b and the sealing sheet 12, a chuck made of non-stretched polypropylene is formed over the entire width of the container. Was part-coated with a width of 5 mm at a distance of 1 mm from the chuck. Subsequently, the chuck was joined, and further, the joining portion of the easily peelable resin was joined using a bag making machine, and the bottom portion was also joined to produce a standing pouch. A sheet 11-a and a sealing sheet 12 are attached to this standing pouch.
390 g of water was charged from the inlet portion between the two. Next, the sheet 11-a and the sealing sheet 12 were heat-sealed with a width of 5 mm 3 mm above the junction of the easily peelable resin at the top of the chuck. Put this pouch in hot water (100 ℃)
To retort treatment by heating for 10 minutes at JIS Z-
According to the method of [0238], the heat sealing strength of the sheet 11-a and the sealing sheet 12 and the heat sealing strength of the easily peelable resin on the content side were measured, and were 2.1 kgf / 15 mm and 0.4 kgf /, respectively. It was 15 mm. Further, according to the method of JIS Z-0238, 4
After applying a compressive load of 0 kgf, JIS Z-023
A leak test was performed by Method B of No. 8. Table 1 shows the results.

(Comparative Example) For comparison, a standing pouch as shown in FIG. 7 was prepared. The standing pouch has a width of 140 mm and a height of 150 mm, and a plastic chuck 15 as shown in FIG.
And the easily peelable joint 13 was provided. Example 1
No easy-to-peel joint was provided on the content side of the chuck. Also, no sealing sheet was used.
The material of the container is the same as in the embodiment. Container sheet 11
A chuck made of unstretched polypropylene is formed inside each of -a and 11-b, and a distance of 1 mm from the chuck is provided on the entrance side of the chuck, and a polyethylene-modified polypropylene resin having an easy peeling property of 5 mm is provided in parallel with the chuck. Part-coated with width. After joining the bottoms to form a standing pouch, the sheets 11-a and 11-b
Fill the container with 390 g of water from the entrance from the entrance between the
After attaching the chuck and heat sealing the easily peelable resin, the resin was subjected to a retort treatment at 100 ° C. for 10 minutes, and the heat seal strength of the easily peelable resin was measured.
f / 15 mm. Further, a leak test was performed by applying a compressive load of 40 kgf according to the method of JIS Z-0238. Table 1 shows the results.

[0035]

[Table 1] Table 1 Number of repetitions Example 1 Comparison Example 1 No leak No squirting from easily peelable heat seal part 2 No leak squirting from easily peelable heat seal part 3 No leak No squirting from easily peelable heat seal part 4 No leakage Spout from easily peelable heat seal section 5 No leak Spray from easily peelable heat seal section 6 No leak Spray from easily peelable heat seal section 7 No leak Spray from easily peelable heat seal section 8 Leakage None Spouted from the easily peelable heat seal section 9 No leakage Spouted from the easily peelable heat seal section 10 No leaked Spouted from the easily peelable heat seal section

Example 2 A plastic container with a chuck as shown in FIG. 3 was prepared. This container is a standing pouch having a width of 140 mm and a height of 150 mm manufactured according to the same specifications as in Example 1. A polyethylene-modified polypropylene resin, which is easily peelable, is placed above the chuck (outside of the container) in parallel with the chuck. Was part-coated with a width of 5 mm at a distance of 1 mm from. Subsequently, the chuck was joined, and further, the joining portion of the easily peelable resin was joined using a bag making machine, and the bottom portion was also joined to produce a standing pouch. In this standing pouch, seat 11
-A and 390 water from the entrance between the sealing sheet 12
g. Next, the sheet 11-a and the sealing sheet 12 were heat-sealed with a width of 5 mm 3 mm above the junction of the easily peelable resin at the top of the chuck. This pouch is subjected to a retort treatment in which the pouch is heated in hot water (100 ° C.) for 10 minutes, and according to the method of JIS Z-0238, the heat sealing strength between the sheet 11-a and the sealing sheet 12 and the outside of the container of the zipper. The heat seal strength of the easily peelable resin was measured to be 2.1 kgf / 1.
They were 5 mm and 0.4 kgf / 15 mm. Furthermore, after applying a compressive load of 40 kgf according to the method of JIS Z-0238, a leak test was performed by the method B of JIS Z-0238. Table 2 shows the results.

Example 3 A plastic container with a chuck as shown in FIG. 4 was prepared. This container is a standing pouch having a width of 140 mm and a height of 150 mm manufactured in the same specifications as in Example 1. On the content side of the chuck, an easily peelable polyethylene-modified polypropylene resin is placed 1 mm from the chuck in parallel with the chuck. 5m with distance
Part m was applied in a width of m, and a thread for tearing the film was adhered to a portion 22 in FIG. Subsequently, the chuck is connected, and further, the bonding portion of the easily peelable resin is bonded using a bag making machine, and the bottom and the C of the sheet 11-b of FIG.
The part and the part B of the sheet 12 were also joined to produce a standing pouch. In this standing pouch, sheet 11-
a and 390 g of water from the inlet between sealing sheet 12
Filled. Next, at a position 20 mm above the joint portion of the easily peelable resin on the content side of the chuck, the A portion of the sheet 11-a, the B portion of the sealing sheet 12, and the C portion of the sheet 11-b have a 5 mm Heat sealed with width. This pouch is subjected to a retort treatment in which the pouch is heated in hot water (100 ° C.) for 10 minutes, and a heat-sealing strength between A-B-C and an easily peelable resin on the inner side of the container of the chuck according to the method of JIS Z-0238. When the heat seal strength was measured, A-
The heat seal strength between B and B-C is both 2.1kg.
f / 15 mm, and the heat seal strength of the easily peelable resin on the inner side of the container of the chuck was 0.4 kgf / 15 mm. Further, according to the method of JIS Z-0238, 4
After applying a compressive load of 0 kgf, a leak test was performed by the method B of JIS Z-0238 in a state where the film was torn at 22 parts. Table 2 shows the results.

[0038]

[Table 2]

As described above, the plastic container with a zipper according to the present invention has excellent durability against internal pressure and is easy to open. , Poor results,
It proved difficult to use for large containers such as gusset bags and standing pouches.

[0040]

The plastic container with a zipper of the present invention is excellent in filling property, opening property, resealing property and pressure resistance even if the contents are liquid, so that a large amount of contents can be prepared. It can be filled and has excellent transport stability and storage stability. The container of the present invention is lightweight, inexpensive,
Since the contents can be filled from the inlet side in spite of the presence of the chuck, it can be used for large containers such as large gusset bags and standing pouches.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of an inlet in one embodiment of a container (standing pouch) of the present invention.

FIG. 2 is a sectional view of the standing pouch of FIG. 1;

FIG. 3 is an enlarged cross-sectional view of an inlet in another embodiment of the container (standing pouch) of the present invention.

FIG. 4 is an enlarged cross-sectional view of an inlet portion in still another embodiment of the container (standing pouch) of the present invention.

FIG. 5 is a sectional view of a standing pouch of the present invention provided with a tear line.

FIG. 6 is a sectional view of another standing pouch of the present invention provided with a tear line.

FIG. 7 is a sectional view of a conventional standing pouch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11-a, 11-b sheet 12 Sealing sheet 13, 14 Easily peelable joint 15 Chuck 17 Cut-off line 21 Container body

Claims (9)

[Claims] 1. A container body having flexibility, and a sealing sheet provided inside the container body, wherein one of the container body and the sealing sheet are connected at an entrance of the container body. It can be opened and closed by a plastic chuck, the other of the container body and the sealing sheet are sealed, and one of the container body and the sealing sheet are easily peeled off on the inner side of the container with respect to the plastic chuck. Plastic container with a zipper joined by a flexible joint. 2. A container body having flexibility, and a sealing sheet provided inside the container body, wherein one of the container body and the sealing sheet are formed at an entrance of the container body. It can be opened and closed by a plastic chuck, the other of the container body and the sealing sheet are sealed, and one of the container body and the sealing sheet are easily separated from the plastic chuck on the outer side of the container. Plastic container with a zipper joined by a flexible joint. 3. A container body having flexibility, and a sealing sheet provided inside the container body, wherein one of the container body and the sealing sheet are connected at an entrance of the container body. It can be opened and closed by a plastic chuck, the other of the container main body and the sealing sheet are sealed, and one of the container main body and the sealing sheet are closer to the outside and inside of the container than the plastic chuck. Is a plastic container with a zipper joined by an easily peelable joint. 4. The plastic container with a chuck according to claim 1, wherein the easily peelable joint is provided in parallel with the plastic chuck. 5. A plastic container with a chuck according to claim 1, wherein a tear line is provided between the plastic chuck and a seal between one of the container body and the sealing sheet. . 6. The distance according to claim 1, wherein a distance between the plastic chuck and the easily peelable joint on the inner side or outer side of the container with respect to the plastic chuck is at least 0.5 mm. A plastic container with a zipper according to item 1. 7. The other end of the container main body and the sealing sheet are at least 2 mm from the end on the content side of the easily peelable joint on the inner side or outer side of the container with respect to the plastic chuck.
The plastic container with a chuck according to any one of claims 1 to 3, wherein the plastic container is sealed at a container outlet side. 8. The plastic container with a zipper according to claim 1, wherein the plastic container with a zipper is a gusset bag, a standing pouch, or a laminated paper pack. 9. The contents are filled from between the other sheet and the sealing sheet of the plastic container body with the chuck according to claim 1, and the other sheet and the sealing are filled. A method for filling contents in a plastic container with a zipper, characterized by sealing a sheet for use.