JP2562629Y2 - Easy-open pouch - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a liquid detergent, a kitchen detergent,
The present invention relates to a refillable content pouch made of a laminated film of a thermoplastic resin used for a liquid content such as a softener, and more particularly, to an easy-opening pouch having good tearability when opened.

[0002]

2. Description of the Related Art In recent years, along with an increase in consumer awareness of the environment, daily life has been reviewed and consumer behavior has also changed. Consumers are now demanding packages that take environmental issues into account. . In view of this environmental problem and the effective use of resources, the recycling campaign for plastic products and the recycling campaign for containers are becoming popular. There is a growing demand for sex containers (refillable containers). Containers for liquid refill contents such as liquid detergent, kitchen detergent, softener, etc. sold separately for this refillable container include pillow packaging (pillow-shaped bags) and standing pouches (self-standing bags with bottom gussets). ) And the like using a laminated plastic film of 500 ml, 1
000 ml and 1500 ml bag-shaped flexible packages (pouches) are widely used. This is because plastics are lightweight, durable, transparent or colourable, easy to process, economical, and the like. When the contents of these pouches are used for opening, the pouches are generally opened by tearing in parallel with the upper side of the pouch from a V-shaped notch provided at the upper end of the pouch. As a general conventional packaging material used for this pouch, [outer layer] biaxially stretched nylon layer (210) / printing ink layer (2) shown in FIG.
11) / adhesive layer (221) / uniaxially stretched polyethylene layer (220) / adhesive layer (231) / linear low-density polyethylene layer (230) [inner layer] laminated film (20)
No. 0) was used, and the pouch was formed such that the tearing direction of the pouch matched the stretching direction of the uniaxially stretched polyethylene film of the constituent layer.

[0003]

However, the laminated film having the conventional structure described above has a low degree of surface treatment at the time of laminating the uniaxially stretched polyethylene layers of the constituent material (with a surface tension of 30 to 30).
(35 dyn / cm), and bleeding (leaking phenomenon) of additives and the like, the adhesive strength between the constituent layers of the laminated film was weak, and the strength of heat sealing at both ends and the bottom of the bag-made pouch was reduced. As a result, although the opening property at the time of opening was good, there was a problem with drop impact resistance, and a bag breakage accident due to dropping occurred during distribution and storage of the product. For this reason, the inventors studied various configurations in order to improve the drop impact resistance of the pouch. As a result, the [outer layer] biaxially stretched nylon layer (31) shown in FIG.
0) / printing ink layer (311) / adhesive layer (341) /
A laminated film (300) having an extruded polyethylene (340) / uniaxially stretched polyethylene layer (320) / extruded polyethylene (350) / linear low-density polyethylene layer (330) [inner layer] was developed. However, it was confirmed that the pouch produced using this laminated film had improved drop impact resistance when dropped, but the tearability when opened was reduced. Therefore, the present inventors have further studied various configurations, and finally arrived at the present invention. The present invention provides an easy-open pouch that has good drop impact resistance during a drop test and is easily torn when opened.

[0004]

According to the present invention, as shown in FIG. 1, an outermost biaxially stretched thermoplastic resin film (110) or a cellophane film having a printing ink layer (111) formed on a back surface thereof is provided. Uniaxially stretched polyolefin film (1
20), a biaxially stretched nylon film (160), and an innermost layer of a polyolefin-based film (130) are sequentially laminated with an adhesive layer (121, 161, 131) provided therebetween. An easy-open pouch made by making the tearing direction upon opening the same direction as the stretching direction of the uniaxially stretched polyolefin film.

As the biaxially stretched thermoplastic resin film of the outermost layer, a stretched nylon film, a stretched polyester film, a stretched polypropylene film, or the like may be used. The uniaxially stretched polyolefin film may be a stretched polyethylene film or a stretched polypropylene film, and the innermost polyolefin film may be a heat sealant layer made of polyethylene, polypropylene, ethylene-vinyl acetate resin, or the like. is there.

The adhesive layer is mainly formed by using an ester-type polyurethane-based adhesive. In addition, a vinyl-based, acrylic-based, polyamide-based, epoxy-based, or rubber-based adhesive may be used. good.

[0007]

[Function] When a biaxially stretched nylon layer is used as the laminated constituent layer inside the laminated film as in the present invention, the toughness and high impact strength of the biaxially stretched nylon layer allow the pouch produced from the laminated film to be formed. Improved drop impact resistance during drop tests. However, since the biaxially stretched nylon layer has a low tear strength, the tearability of the uniaxially stretched polyolefin layer at the time of opening the pouch is not impaired, and the openability of the pouch is improved.

[0008]

FIG. 1 is a sectional view showing a laminated structure of a laminated film according to the present invention used in the present embodiment, and FIG. 4 is an easy-opening standing of the present embodiment manufactured using the laminated film. It is a perspective view of a pouch. Next, embodiments will be described in detail with reference to the drawings.

First, characters and pictures are printed on a 15 μm thick biaxially stretched nylon film by a gravure printing method, and a 25 μm thick uniaxially stretched polyethylene film is printed on the printed surface thereof using an ester type polyurethane adhesive by a dry lamination method. The biaxially stretched nylon film having a thickness of 15 μm is laminated on the surface of the uniaxially stretched polyethylene film using an ester-type polyurethane adhesive by a dry lamination method. A low-density polyethylene film was laminated using an ester-type polyurethane-based adhesive by a dry lamination method, and the [outer layer] biaxially stretched nylon layer (110) / printing ink layer (111) / adhesive layer ( 121) / Uniaxially stretched polyethylene layer (120) / adhesion Layer (161) / biaxially oriented nylon layer (160) / adhesive layer (131) / linear low density polyethylene (130) [inner] configuration of the laminated film (1
00).

[0010] Next, using the produced laminated film, the tearing direction at the time of opening is adjusted in the same direction as the stretching direction of the uniaxially stretched polyolefin film in the constitution with a bag making machine, and the left and right sides of the pouch are formed. The end and the bottom are heat-sealed, and the upper side is 170 mm wide and 265 high.
mm standing pouch type packaging,
A V-shaped notch (401) is cut into the open position above the heat seal surface at the left and right side edges, filled with 1000 ml of water, and the upper side is heat-sealed and sealed, and the standing shown in FIG. A pouch (400) was made.

Further, for comparative evaluation with the pouch according to the embodiment of the present invention, [outer layer] 25 μm thick biaxially stretched nylon layer (210) / printing ink layer (211) / adhesive layer (221) shown in FIG. ) / 25 μm-thick uniaxially stretched polyethylene layer (220) / adhesive layer (231) / 130 μm-thick linear low-density polyethylene layer (230) [inner layer] and a conventional laminated film (200) shown in FIG. Outer layer) 25μ
m thick biaxially stretched nylon layer (310) / printing ink layer (3
11) / Adhesive layer (341) / 20 μm thick extruded polyethylene (340) / 25 μm thick uniaxially stretched polyethylene layer (320) / 20 μm thick extruded polyethylene (350)
/ 130 μm thick linear low density polyethylene layer (330)
[Inner layer] Two types of laminated films of the trial prototype laminated film (300) with improved drop impact resistance of the configuration were prepared,
Using these laminated films, comparative pouches were produced in the same manner as the pouches of the above-mentioned examples.

Next, the physical properties of the three types of laminated films thus produced and the three types of pouches made from the laminated films were compared and evaluated. For the laminated film, the peel strength between the layers was measured with a Tensilon tensile tester, and the results are shown in Table 1. For the pouch, the heat seal strength (side and bottom) and the drop strength (filled with 1000 ml of water,
The number of times of dropping 5 times vertically and 5 times horizontally on a concrete floor from a height of 1 m until the bag was broken) and the tear strength at the time of opening (Elemendorf method) were measured. The results are shown in Table 2.

[0013]

[Table 1]

[0014]

[Table 2]

According to the results shown in Tables 1 and 2, the pouch using the conventional laminated film has a good tearing property at the time of opening, but has a problem that the strength between the constituent layers, the heat sealing strength and the drop strength are weak. The pouch using the laminated film of the experimental prototype has high strength between the constituent layers, heat sealing strength, and drop strength, but has a problem of poor tearability when opened. On the other hand, the pouch using the laminated film having the structure of the present invention had high strength between the constituent layers, heat seal strength, and drop strength, and also had good tearability when opened.

[0016]

As described in the above embodiment, the refillable content pouch manufactured using the laminated film having the structure of the present invention has strength between constituent layers, heat sealing strength,
High drop strength, and good tearability when opened.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a laminated structure of a laminated film according to the present invention used in Examples.

FIG. 2 is a cross-sectional view showing a laminated structure of a conventional pouch laminated film.

FIG. 3 is a cross-sectional view showing a laminated structure of a laminated film that has been experimentally manufactured.

FIG. 4 is a perspective view of the easy-opening standing pouch of the present invention produced in the embodiment.

[Explanation of symbols]

100, 200, 300 laminated film 110, 210, 310 biaxially stretched nylon 111, 211, 311 printed layer 120, 220, 320 uniaxially stretched polyethylene layer 121, 131, 161, 221, 231, 341 ...
Adhesive layer 160 Biaxially stretched nylon layer 130, 230, 330 Linear low density polyethylene layer 340, 350 Extruded polyethylene 400 Pouch 401 V-shaped notch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B65D 30/02 B65D 30/02

Claims (1)

(57) [Scope of request for utility model registration] An outermost layer of a biaxially stretched thermoplastic resin film or cellophane film, a uniaxially stretched polyolefin film, a biaxially stretched nylon film, and an innermost layer of a polyolefin-based film are provided with an adhesive layer therebetween in this order. An easy-open pouch made by using the laminated laminated film and making the tear direction at the time of opening the same direction as the stretching direction of the uniaxially stretched polyolefin film.