JPH0343133B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for attaching an opening in heat-shrinkable synthetic resin film packaging, and more particularly to a method for attaching an opening in heat-shrinkable film packaging that provides a package with a beautiful appearance. It is something.

Conventional methods for providing openings in heat-shrinkable film packaging include adding perforations for opening at appropriate positions in the package wrapped with synthetic resin film, and openings at opposite edges where the films are joined. After printing a printed part made of non-thermal adhesive ink on the inner surface of key points, when wrapping an object with this film, the inner surfaces of the edges of the film to be joined to each other are polymerized, and the wrapping body is By applying a so-called folding seal that protrudes further outward and heat seals, only the printed parts on both edges that overlap each other are left unjoined, and after heat shrinkage, this unjoined part becomes an opening. Things were warm.

However, the former method of creating perforations has disadvantages such as the troublesome work of creating perforations, the perforation holes expanding during heat shrinkage, and the perforations being cut off during handling, resulting in spontaneous opening. On the other hand, in the case of the latter, which employs the so-called gassho sealing method, the joint part deforms and shrinks due to the heat sealing method, and the joint part protrudes outward from the package, resulting in a poor appearance. Even when the packages are stacked, the protruding palm seal portion becomes a hindrance, resulting in an unstable situation.

The object of the present invention is to eliminate these drawbacks and provide a method for attaching an opening in a heat-shrinkable film package, which provides a package with a particularly beautiful appearance.

That is, the present invention provides a thin piece that has or does not have gripping portions at appropriate locations on the mutually bonded surfaces of the sealing portion of the film when wrapping an object with an envelope using a heat-shrinkable synthetic resin film. Wrapping the packaged object with a film attached with
Furthermore, by heat-shrinking this, a package with a beautiful appearance is formed, and a method for attaching an opening in heat-shrinkable synthetic resin film packaging by providing a non-adhesive part consisting of the above-mentioned thin-piece attached part in the seal part. be.

The thin piece used in this method is made of paper, synthetic resin film, metal foil, or a laminate thereof, and the grip part is provided so as to protrude outward from the seal part of the film so that it can be grasped with a person's fingers when opening. It is intended to do so.

Furthermore, electrostatic sealing is a type of blocking that is produced by applying static electricity to the sealed material, such as overlapping synthetic resin films, using an electrostatic generator instead of a conventional heat sealing plate. The film is brought into close contact with a wide area over the entire width of the seal, and the seal portion to which the electrostatic seal is applied has a flat, transparent, and beautiful appearance without any seal marks on the outside.

Next, one embodiment of the present invention will be described based on the drawings.

First, thin pieces 2 having gripping portions 5 are attached at regular intervals to the edge of a heat-shrinkable synthetic resin film 1 using an adhesive or the like. At this time, the grip part 5 adheres the packaged object so that it protrudes from the seal part 3 formed by the electrostatic seal of the film after packaging. Then, the sealed portions 3 of the film 1 to which the flakes have been attached are stacked in an envelope shape to perform electrostatic sealing, while a fusing seal portion 4 is formed in a direction perpendicular to the sealed portions 3. Next, the package wrapped with the above film is heat-shrinked in a heat-shrink tunnel to form a package with a transparent sealing part 3 and a beautiful appearance without heat-sealing marks. For thin piece 2, the films are not bonded to each other and form a non-bonded part,
This non-adhesive portion serves as an opening. thin section 2
The film can be easily opened by pulling the gripping piece 5 if there is a gripping piece 5, or by placing a finger or other appropriate puller on the opening opening and pulling the film if there is no gripping piece 5. It is possible to do so.

Since the present invention has the above-described structure, it is possible to eliminate the drawbacks of the conventional methods and form a strong seal, and also to form a package with a transparent seal and a beautiful appearance without heat seal marks. It is something that can be done.

Furthermore, if a JIS standard barcode symbol (postmark, ie, source marking) is printed on the thin piece, it will be useful for sales, inventory management, etc. of the packaged object.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a heat-shrinkable synthetic resin film with thin pieces having gripping pieces attached at regular intervals to the edge of the film, and FIG. 2 is a heat-shrinkable synthetic resin film with openings provided by the method of the present invention FIG. 2 is a perspective view of a package made of synthetic resin film. 1... Heat-shrinkable synthetic resin film, 2... Thin piece for opening, 3... Seal portion by electrostatic seal, 4
... Fusing seal portion, 5... Thin gripping piece.

Claims (1)

[Claims] 1. A film that has thin pieces with or without gripping portions attached to appropriate locations on the mutually bonded surfaces of the sealing portion of the film when wrapping objects with envelopes made of heat-shrinkable synthetic resin film. Wrap the packaged object with the film, overlap the sealed portion of the film, perform electrostatic sealing, and then heat shrink to form a package, and provide the sealed portion with a non-adhesive portion consisting of the above-mentioned thin piece attachment portion. A method for attaching an opening in heat-shrinkable synthetic resin film packaging, characterized by: