JPH04109066U - packaging bag - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a packaging bag that can be easily sealed like a drawstring. [Structure] Opening 4 in the packaging bag body 3 made of flexible packaging material such as plastic film, aluminum foil, paper, etc.
A belt-shaped shrink film 5 that shrinks due to heat is placed around the opening 4 on the outer or inner surface of the vicinity, and the adhesive parts 6 are attached at several places.
Attach it with By applying heat to the portion of the shrink film 5, the shrink film 5 shrinks at the non-adhesive portion, and the flexible packaging material becomes wavy and sealed in a purse-like shape.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a packaging bag made of flexible packaging material.

0002

[Conventional technology]

Traditionally, products such as confectionery and miscellaneous goods have been made of plastic films, paper, etc. It is sold at stores such as supermarkets in a packaged bag. Usually, such packaging bags are made into pillow bags, three-sided sealed bags, four-sided sealed bags by automatic bag making machines. Bags are often made in the form of a plastic bag, but depending on the contents, the opening may be tied with a string or a string. It is known to be tied with a bong and made into a so-called purse-string bag.

0003

[Problem that the idea aims to solve]

The drawstring-shaped packaging bag mentioned in the conventional technology differs in its form from a normal packaging bag. Although it has the advantage of attracting the attention of consumers because of the fact that it is The packaging process is complicated, as it is necessary to squeeze the opening and tie string or ribbon around it. There was a problem.

0004 This invention was created in view of the above problems, and its purpose is to The object of the present invention is to provide a packaging bag that can be easily sealed in the form of a drawstring.

[0005]

[Means to solve the problem]

In order to achieve the above object, the packaging bag of the present invention is made of flexible packaging material and has a uniform A packaging bag main body having an opening on the side, and an outer surface of the packaging bag main body near the opening or A strip-shaped shrink film that is bonded to the inner surface around the opening and shrinks due to heat. The shrink film and the packaging bag body are partially bonded at multiple locations. It is characterized by

[0006] Here, the above flexible packaging materials include plastic film, aluminum foil, and paper. etc. are used, and packaging materials that are composites of these are also used.

[0007]

[Effect]

When the packaging bag with the above structure is heated, the shrink film becomes The film shrinks in the non-bonded areas. As a result, the main body of the packaging bag closes to its opening. The opening becomes wavy and the opening is closed.

[0008]

【Example】

Fig. 1 is a plan view showing an embodiment of the packaging bag according to the present invention, and Fig. 2 is a cross section taken along line AA in Fig. 1. It is a diagram. The packaging bag 1 is made by stacking two laminated films and sealing parts 2 on three sides. A packaging bag body 3 that is bonded with a sheet seal, and an upper side of this packaging bag body 3. A strip of shrink film 5 adhered to both outer sides of the opening 4 at a distance from the edge of the opening 4. , 5. Then, each shrink film 5 is attached at several places including both ends (the main part). It is adhered to the packaging bag main body 3 at adhesive parts 6 (5 places in the embodiment).

[0009] The laminated film 7 forming the packaging bag body 3 is made of a material that does not shrink due to heat. In this example, the inner layer 8 is made of an unstretched polypropylene film with a thickness of 40 μm. and an outer layer 9 made of a 12 μm thick polyester film by dry lamination. A laminated material is used. On the other hand, the shrink film 5 shrinks due to heat. In this example, a 40 μm thick polystyrene film (Asahi Kasei) was used. ``Sunveil'' manufactured by Co., Ltd.) is used. And aliphatic ester in adhesive Use type products (“LX703A”, “KR90”, etc. manufactured by Dainippon Ink Co., Ltd.) Then, as mentioned above, the shrink film 5 is bonded to the outer surface of the packaging bag body 3 at several adhesive points 6. are doing.

0010 When the packaging bag 1 with the above configuration was placed in an oven and heated at 120°C for 10 seconds, As shown in FIG. 3 in a straight line, the shrink film 5 is 40% The laminated film 7 shrinks and becomes wavy near the shrink film 5, causing the opening 4 was closed like a purse, as if tied with tape, as shown in FIG.

[0011] In addition, in the above embodiment, an example in which the shrink film 5 is adhered to the outside of the packaging bag body 3 is used. As shown, the shrink film 5 goes around the inside of the packaging bag body 3, that is, the opening 4. It may be adhered to both sides of the inner surface in this manner. If you glue it like this, you can The laminated film 7 becomes wavy on the outside of the shrink film 5 and the opening 4 is closed. It will be.

0012 In addition, the above-mentioned polystyrene film can be used as a shrink film that can be used in this invention. In addition to film, there are stretched nylon films, polyvinyl chloride films, etc.

[0013]

[Effect of the idea]

As explained above, the packaging bag of the present invention does not require heating of the shrink film part. As a result, the shrink film shrinks in the non-adhesive area, forming a flexible package that forms the packaging bag body. The material becomes wavy near the shrink film and the opening is closed, making it easy to It can be sealed in the form of a purse.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of a packaging bag according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG. 1;

FIG. 3 is a diagram linearly showing a state in which the shrink film is shrunk.

FIG. 4 is a schematic diagram showing a state in which the opening is closed.

[Explanation of symbols]

1 Packaging bag 3 Packaging bag body 4 Opening 5 Shrink film 6 Adhesive part 7 Laminated film (flexible packaging material)

Claims (1)

[Scope of utility model registration request] 1. A packaging bag body made of a flexible packaging material and having an opening on one side; and a band-shaped belt that is bonded to the outer surface or inner surface of the packaging bag body in the vicinity of the opening so as to go around the opening, and that shrinks when heated. 1. A packaging bag comprising a shrink film, wherein the shrink film and the packaging bag body are partially bonded at a plurality of locations.