JPS6111329A - Method of annexing tear mouth in heat-shrinkable synthetic resin film packaging - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

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

However, the former method of attaching perforations has disadvantages such as attaching perforations is troublesome, the perforation holes expand during heat shrinkage, and the IC perforations are cut during handling and the package opens automatically. there were. On the other hand, in the latter case, which employs the so-called palm-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. In addition, even when stacked in a package, the protruding combined seal part can be attacked by thieves and is unstable.

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

That is, the present invention provides a heat-shrinkable synthetic resin film that has or does not have #a grooves at appropriate locations on the surfaces that are bonded to each other when wrapping an object with an envelope. Wrapping the packaged object with a film to which a thin flake has been attached, and applying electrostatic sealing by overlapping the sealed portion of the film, and further heat-shrinking this to form a package with a beautiful appearance, and also sealing the sealed portion. This is a method for attaching an opening in a heat-shrinkable synthetic resin film package by providing a non-adhesive part consisting of the above-mentioned thin-piece attached part.

The thin strip used in this method is made of paper, synthetic resin film, metal foil, or a laminate thereof, and the gripping portion is provided so as to protrude outward from the sealed portion of the film so that it can be opened with the fingers of the original person. It makes it possible to grasp it.

In addition, electrostatic sealing is a process in which static electricity is applied to the sealing portion of the material to be sealed, such as a synthetic resin film, using an electrostatic generator instead of a conventional heat sealing plate.
This creates a kind of pronking and brings the film into close contact over a wide area over the entire width of the seal, and the sealed portion that has been electrostatically sealed has a flat, transparent, and beautiful appearance without any seal marks.

Next, one embodiment of the present invention will be described with reference to 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 8155 attaches the packaged object so that it protrudes from the sealed portion 3 formed by the electrostatic seal of the film after packaging. HI
Electrostatic sealing is performed by overlapping the ff shape +c, and on the other hand, a fusing seal s4 is formed in a direction perpendicular to the seal portion 3.

Next, the package wrapped with the above film is heat-shrinked in a heat-shrink tunnel to form a package with a beautiful appearance without heat-sealing marks on the seal part 3, and to form a package with a beautiful appearance without any heat seal marks. Because of the thin piece 2, the films are not bonded to each other to form a non-adhesive portion, and this non-adhesive portion serves as an opening. If the thin piece 2 has a gripping piece 5, the film can be opened easily by pulling the gripping piece 5, or if there is no gripping piece 5, the film can be opened easily by placing a finger or other appropriate puller on the opening and pulling the film. 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 TIB standard barcode symbol (boss mark, ie, source marking) is printed on the thin strip, it will be useful for sales of packaged objects, inventory management, etc.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a heat-shrinkable synthetic resin film in which thin pieces having all the gripping pieces are attached at regular intervals to the edge of the film, and Fig. 2 is a perspective view of 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 a shrinkable synthetic resin film. 1. Heat-shrinkable synthetic resin film 2.
, Thin piece for opening 3,,,,,! Seal part 4 with electrical seal
Fused seal portion 5, Grasp cantilever permit Applicant's procedural amendment (spontaneous) October 9, 1980 Manabu Shiga, Commissioner of the Patent Office 2, Name of the invention In heat-shrinkable synthetic resin film packaging Law for attaching an opening 3, relationship with the case of the person making the amendment Address of the patent applicant 763 5154, Kagawa Prefecture, Kagawa Prefecture, Kagawa Prefecture, Date of amendment order Voluntary amendment 5, subject of amendment Contents of the amendment to the description and drawings No. The phrase "also stable" on page 3, line 2, has been corrected to "unstable."

Claims (1)

[Claims] When packaging an object with an envelope using a heat-shrinkable synthetic resin film, a film with or without gripping portions attached to appropriate locations on the mutually bonded surfaces of the sealing film is used. Wrapping the object to be packaged, overlapping the sealed portions of the film, performing electrostatic sealing, and then heating and shrinking to form a package, and providing a non-adhesive portion consisting of the above-mentioned thin piece attachment portion in the sealed portion. A method for attaching an opening in heat-shrinkable synthetic resin film packaging characterized by: