JP2560666Y2 - Wound heat-shrinkable package with opening function - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-shrinkable package having an opening function which can be easily opened. In particular, it is effectively used for packaging products that require subdivision.

[0002]

2. Description of the Related Art Conventionally, as a method for opening a heat-shrinkable package, there has been a method of performing perforation processing,
The perforation hole becomes large in the shrinking tunnel, and the bag breaks from the perforation part during transportation. To solve these problems, Japanese Utility Model Publication No. Hei 3-230 is proposed.
No. 76. That is, a heat-shrinkable package in which an opening tape is attached to a perforation portion has been developed. However, even when the package was pulled by tearing the opening tape, the opening tape was cut at the seal portion applied to the package, and the entire circumference of the package could not be completely cut. . Conventionally, a heat-shrinkable film is wound around an object to be packaged, and the film edges are simply overlapped in an envelope-applied form and passed through a shrinkage tunnel to cause heat shrinkage, and at the same time, heat-blocking the overlapped portion. The method has been done. At this time, although both ends of the package are in the opened state, the package is sufficiently held so as not to protrude outside due to shrinkage of the heat-shrinkable film. (Less than,
The heat-shrinkable package obtained by such a method is referred to as “wrapped heat-shrinkable package”. )

[0003]

SUMMARY OF THE INVENTION The present invention has an opening function that allows the entire circumference of the heat-shrinkable package to be completely cut off by pulling an opening tape, so that it can be easily opened or divided. Moreover, it is an object of the present invention to provide a wrapped heat-shrinkable package which has a good packaging finish and is hard to break during transportation or transportation. In the present invention, "subdivision" means the following. For example, it means that several can juices are placed on a corrugated cardboard tray, and two or three pallets thereof are arranged side by side in the horizontal direction and then shrink-wrapped and subdivided for each tray at a wholesaler or the like. At this time, it is preferable that the trays are covered with the heat-shrinkable film and tied even after the subdivision.

[0004]

In order to solve the above-mentioned problems, the present invention takes the following measures. That is, the packaged article is provided with one or more sets of two or more perforation rows, and one or more sets of perforation rows are applied, and an opening tape having a melting point higher than the melting point of the heat-shrinkable film so as to be covered by each set of the perforation rows. By the heat-shrinkable film to which is attached, the perforation row is wound so as to be in the winding direction and heat-shrink-wrapped, and the edges of the wound film which are superimposed in an envelope-like shape are adhered by heat blocking. (Claim 1). In order to further improve the opening property, at least a part of the opening tape attached to the heat-shrinkable film is provided with an opening start cut through the heat-shrinkable film and the opening tape. Item 2) is preferred. For example, among the wound film edges overlapped in an envelope-pasted shape, at the end of the opening tape of the outer stacked film edge,
It is more preferable to provide an opening start notch (claim 3).

Hereinafter, the contents of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an example of a wrapped heat-shrinkable package having an opening function according to the present invention. First, the heat-shrinkable film (4) is provided with a set of two rows of perforations (2), and an opening tape (3) is attached to the perforations. The package is wound by such a heat-shrinkable film so that the perforation row is parallel to the winding direction, and is heat-shrinked. In addition, the edges (5) and (6) of the wound film of the film undergo heat blocking during heat shrinkage.

FIG. 2 shows an opening function in which a part of the opening tape attached to the heat-shrinkable film is provided with an opening start notch (7) penetrating the heat-shrinkable film and the opening tape. It is a perspective view which shows an example of a winding heat-shrinkable package (Claim 2). FIG. 3 is a schematic view showing an example of the shape of an opening start notch (7) provided in a part of such an opening tape.

[0007] FIG. 4 shows an opening start notch (7 ') at the end of the opening tape affixed to the outer wrapped film edge (5) of the wrapped film edges superimposed in the form of an envelope. It is a perspective view which shows an example of the wound heat-shrinkable package (Claim 3) provided with the opening function provided.
FIG. 5 is a schematic diagram showing an example of the shape of the opening start notch (7 ') provided at the end of the opening tape of the film edge (5) which is overlaid on the outside.

The heat-shrinkable film used in the present invention is not particularly limited, and those conventionally used for heat-shrink wrapping can be used. Particularly preferably, a multilayer heat-shrinkable film in which the melting points of the resins used for both surface layers are different is suitably used. For example, a multilayer product composed of a polypropylene resin and a polyethylene resin, a multilayer product composed of a high-density polyethylene resin and a low-density polyethylene resin, and the like can be given.

The opening tape of the present invention is made of a resin having a melting point higher than the melting point of the resin used for the heat-shrinkable film, has a high tensile strength in the vertical direction, and furthermore, tears in the vertical direction. Those that are easy are preferred. For example, it is preferably made of high-density polyethylene or polypropylene, or polyester or nylon, and is stretched.
The reason is that the first thing made of resin with high melting point is
This is because heat blocking does not occur in the portion where the tape for opening is interposed in the overlapped portion of the envelope, and the overlapped portion of the envelope can be easily cut at the time of opening. In addition, when the tensile strength in the longitudinal direction is high, the tape is hardly cut at the time of opening. Furthermore, those that are easily torn in the vertical direction are likely to be cut along perforations when opened.

[0010] The shape of the perforations is not particularly limited, but it is necessary that one set has two or more rows and the interval between them is smaller than the width of the opening tape. When the perforations are only in one row, the perforations are unlikely to be cut from the perforations even if the opening tape attached thereto is pulled. Also, how many sets of perforations are provided in two or more rows may be appropriately determined depending on the size and shape of the article to be packaged. It is also determined by the number of subdivisions.

The opening tape is attached when the film is in a film state before packaging. If the film is attached in the film state, the packaging process is simple and the packaging finish is good. Further, the opening tape is preferably heat-shrinkable in the same manner as the heat-shrinkable film from the viewpoint of packaging finish.
The opening tape may be on the outside or the inside of the package, but is preferably on the outside because the perforation holes are covered and the appearance is improved. When the opening tape is attached to the inside of the package, the opening tape must be easily tearable in the vertical direction.

[0012]

According to the present invention, the heat-shrinkable wrapping package having the opening function can be completely opened without breaking the opening tape at the overlapped portion of the envelope when pulling the opening tape. The circumference can be completely cut.
That is, first, when pulling the unsealing tape attached to the outer edge of the film overlapped at the envelope-attached overlap portion, the overlap portion is affected by the inner overlap portion because no heat blocking occurs. It can be easily cut like other parts without any. Next, pulling the unsealing tape attached to the edge of the film that has been overlapped in the envelope-attached overlapping part, the outer part has already been cut, so other parts are not affected by the outer part. It can be easily cut in the same way as.

[0013]

[Effect] The heat-shrinkable wrapping package having the opening function of the present invention has no problem that the perforation hole expands when passing through the shrinkage tunnel, has a good packaging finish, and is broken from the perforation during transportation and transportation. There is no bag. Further, the entire circumference of the package can be completely cut by pulling the opening tape, so that the package can be easily opened. Furthermore, it is very useful in the subdividing operation that the entire circumference of the package is completely cut.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a wrapped heat-shrinkable package having an opening function.

FIG. 2 is a perspective view showing an example of a wrapped heat-shrinkable package having an opening function in which an opening start cut is provided in a part of the opening tape.

FIG. 3 is a schematic view showing an example of the shape of an opening start notch provided in a part of an opening tape.

FIG. 4 is a perspective view showing an example of a wrapped heat-shrinkable package in which an opening start notch is provided at an end of an opening tape at an edge portion of an outer film.

FIG. 5 is a schematic diagram showing an example of the shape of an opening start notch provided at the end of the opening tape at the edge of the film which is overlaid outside.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 Packaged material 2 Perforation 3 Opening tape 4 Heat-shrinkable film 5 Outer wrapped film edge of envelope film superimposed 6 Envelope film edge of envelope film superimposed Of which, the inner edge of the film 7 is opened at a part of the opening tape. The opening opening cut 7 'is opened at the end of the opening tape attached to the outer edge of the film (5). Start notch

Claims (3)

(57) [Scope of request for utility model registration] 1. A heat-shrinkable film in which an object to be packaged (1) is provided with at least one set of perforations (2) composed of two or more rows, and is covered by each set of the perforated rows. Melt higher than the melting point of (4)
The heat-shrinkable film (4) to which the opening tape (3) having dots is applied is wound so that the perforation rows are parallel to the winding direction and heat-shrinked, and furthermore, is overlapped in an envelope-attached shape. The wrapped film edges (5) and (6) are heat-shrink wrapped packages having an opening function, which are adhered by heat blocking. 2. The method according to claim 1, wherein at least a part of the opening tape attached to the heat-shrinkable film is provided with an opening start notch (7) penetrating the heat-shrinkable film and the opening tape. A wrapped heat-shrinkable package with an opening function. 3. An opening start notch (7 ') provided in at least a part of an opening tape stuck to the heat-shrinkable film, the winding film edge portion (5) superimposed in an envelope stuck shape, 3. The method according to claim 2, wherein the outer edge of the film edge is provided at an end of the opening tape.
A heat-shrinkable wrapped package having an opening function according to item 1.