JPH08281Y2 - Tack label for wrapping product packaging for microwave processing and packaging - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention provides a tack label and a tack label for facilitating the rupture of an encapsulating film of a product package to be subjected to microwave treatment such as microwave heating and cooked food. Regarding the package.

[Conventional technology]

A microwave-processed food package that heats and cooks the processed food as it is by microwave irradiation in a microwave oven is a plastic package for guaranteeing the virginity of the contents and preventing alteration / deterioration. Often wrapped with a film (heat-shrinkable film, stretch film, etc.). Since the encapsulating film is tightly wrapped without any unevenness or wrinkles, it is difficult to pick the film with your fingertips when opening the package after the contents have been heated and cooked. Moreover, even if it can be picked with a fingertip, it is not easy to tear the film by only the force of the fingertip, and after all, it is inevitable to tear the film after making a notch with a cutter or scissors.

As a means for facilitating the operation of breaking the film of such a package, the unsealing structure shown in FIG. 5 is known (Japanese Utility Model Publication Nos. 58-84966 and 59-186262). As shown in the figure, the unsealing structure is such that the encapsulating film (2
Cut lines (22) at appropriate places in 1) to form U-shaped or V-shaped tongue pieces (23), and then stick tack labels (10 ') on the surface. That is. As shown in FIG. 4, the tack label (10 ') is composed of a base film (11) and an adhesive layer (13) applied to the back surface thereof, and a portion (12) on one end side of which the adhesive is omitted. You can pick it up with your fingertips as a picking allowance. When opening the package (20), the tab margin (12) of the tack label (10 ') is picked up with a fingertip and pulled in the direction of the arrow, and the tongue-shaped piece previously formed on the film (21). (23) will adhere to the back surface of the tack label (10 ') and will be peeled off together with the tack label (10') from the inside of the film (21), so pull the tack label (10 ') in the arrow direction as it is. For example, the film (21) is ruptured starting from the V-shaped or U-shaped cut line of the tongue (23).

[Problems to be solved by the device]

According to the above-mentioned unsealing structure, the encapsulating film can be easily ruptured and removed by a simple operation of picking the tack label with a fingertip and pulling it. Since the tongue piece (23) must be formed by forming a die or U-shaped cut line, it is necessary to incorporate a cutting device for that purpose in the packaging machine. Further, when the score line is formed after packaging, the selection of the place where the score line (22) is to be formed is restricted so that the container body (24) of the package is not scratched by the score blade. Further, in the case of a package body in which a stretch film or the like is used as the encapsulating film and is fastened by the elastic contraction force generated by forcibly stretching and expanding the film, a tongue piece (23) is formed on the surface of the film. Score line (22)
When the film is inserted, the film tears from the score line as a starting point, so that the above-mentioned opening structure cannot be adopted.

The present invention provides an improved tack label and package for solving the drawbacks of the opening structure using the tack label.

[Means for solving the problem]

The tack label for breaking, which is affixed to the encapsulating film of the microwave-processed product package of the present invention, has an adhesive layer for adhering to the surface of the encapsulating film, on the back surface of the base film.
A layer made of a substance that generates heat by microwaves for heating and forming a heat-affected zone that becomes the breaking start edge of the encapsulating film while being applied except for the edge portion that serves as a picking margin, It is characterized in that it is laminated within the coating surface of the agent layer.

The present invention will be described below with reference to FIGS. 1 to 3 showing an embodiment. In the figure, the same members as those in FIGS. 4 and 5 are designated by the same reference numerals.

(14) is a layer made of a substance that generates heat by microwaves (hereinafter referred to as "microwave heat generating layer"). The microwave exothermic layer (14) is a thin film layer formed by, for example, printing ink in which fine metal powder such as aluminum is kneaded, metal vapor deposition, or sticking of metal foil pieces, and the label substrate film ( 11) It is formed within the surface of the adhesive layer (13) on the back surface. The microwave exothermic layer (14) may be laminated on the adhesive layer (13), or vice versa, on the back surface of the base film (11) prior to the application of the adhesive layer (13). After being formed, the pressure-sensitive adhesive layer (13) may be applied so as to cover the microwave exothermic layer (14).

The microwave exothermic layer (14) is formed in a line pattern as shown in FIG. Although the illustrated line pattern is a U-shaped example, it may be V-shaped or U-shaped. The line pattern is the cut line (2) forming the tongue piece (23) of the encapsulating film (21) in the conventional unsealing structure (Fig. 5).
It corresponds to the line shape in 2). The figure [II]
Of the film is a four V-shaped pattern composed of two orthogonal lines, and four picking margins (12) are provided corresponding to each of the V-shaped patterns so that the film is unsealed. At this time, the tack label can be pulled in any of the four directions.

The microwave heat-generating layer (14) does not necessarily have to be a linear pattern, and may be formed in a planar pattern having an appropriate planar shape. FIG. 1 [III] shows an example of a thin film layer having a triangular surface pattern, and FIG. 1 [IV] shows an example of a thin film layer having a square surface pattern.

When the tack label of the present invention is attached to the surface of the encapsulating film (21) of the microwave processing product package (20), the encapsulating film is different from the conventional unsealing structure shown in FIG. It is not necessary to engrave the tongue-like piece (23) by the cut line (22) on the (21), and as shown in FIG. 2, the tongue-like piece (23) may be directly attached to an arbitrary place on the surface of the encapsulating film (21). The front surface of the tack label (10) is provided with a desired display by printing (for example, an arrow mark indicating a label peeling direction as shown in the drawing).

[Action]

When the product packaging with the tack label of the present invention is subjected to microwave irradiation treatment in a microwave oven, the encapsulating film (2
1) is heated by the heat generated by the microwave heat-generating layer (14) on the back surface of the label. The encapsulating film (21) deteriorates (reduces in strength) of the film material due to the heat effect thereof, and changes to a state in which it is easily broken. That is, the heat-affected zone generated in the encapsulating film by the heat generation of the microwave exothermic layer (14) becomes the rupture starting end when the encapsulating film (21) is cut and removed, and as shown in FIG. Pinch the picking allowance (12) of the label (10), lift it up, and pull it in the direction of the arrow.
The encapsulating film (21) can be easily torn and removed starting from the heat-affected zone. The shape of the heat-affected zone formed on the encapsulating film (21) is linear, strip-shaped, planar or the like depending on the pattern of the microwave heat-generating layer (14).
In both cases, the heat-affected zone functions as a rupture start point as an effect of strength deterioration of the encapsulating film.

The tearing of the encapsulating film (21) due to the pulling of the tack label (10) does not necessarily occur in the exact strip shape as shown in the figure (this point also applies to the conventional unsealing structure shown in FIG. 5). However, if the tack label (10) is peeled off and a bag is broken in a part of the encapsulating film (21), the subsequent film removal is extremely easy.

Needless to say, the package to which the tack label of the present invention is applied is not limited to the one using a fixed container such as a tray, and is also applied to the package using a soft bag.

[Effect of device]

The tack label according to the present invention does not require engraving of the cut line of the encapsulating film, unlike the opening structure of the conventional tack label. Therefore, (i) the film cutting device is not required, and the label can be attached only by the ordinary labeler, and can be attached by hand if desired. In addition, the conventional tack label sticking must be performed continuously with the film cutting step in the packaging line where the encapsulating film is cut, but the tack label of the present invention does not require the cutting of the encapsulating film. Can be attached at any stage inside or outside the packaging line, and can be attached, for example, when the product purchaser applies the microwave to the package.

(Ii) In the conventional unsealing structure, in order to avoid damage to the container body due to contact of the cutting blade when engraving the cutting line, the cutting line engraving position (labeling position) is The tack label of the present invention, which is limited to the place where there is a space at the interface between the container surface and the film, but does not require engraving of the score line, can be attached to any place without such limitation. .

(Iii) In the case of the conventional unsealed structure, the stretch film or the like will break the bag due to its own elastic contraction force if the score line is engraved after packaging, and the score line is put and the tack label is attached before packaging. Even if it is worn, it cannot be used as an exterior film because the label peels off when the film is stretched, but since the tack label of the present invention does not need to have a score line, You are not subject to such restrictions on your choice.

(Iv) The product package to which the tack label of the present invention has been applied only undergoes the heat treatment of the contents when subjected to microwave treatment by a microwave oven or the like for heat treating the contents. As a microwave irradiation effect, the encapsulating film can be easily broken like the conventional breaking structure with a score line, and the tack label can be peeled off to easily take out the heat-treated contents. It can be carried out.

[Brief description of drawings]

1 [I] [II] [III] [IV] are perspective views showing an embodiment of the tack label of the present invention, FIG. 2 is a perspective explanatory view of the tack label of the present invention when attached, and FIG. Is a perspective view showing a film rupture of a package to which the tack label of the present invention is attached, FIG. 4 is a perspective view showing a conventional tack label, and FIG. 5 is a conventional opening using the tack label of FIG. It is isometric view explanatory drawing which shows a structure. 10, 10 ′: tack label, 11: base film, 12: picking margin, 13: adhesive layer, 14: microwave heat-generating layer, 20: wrapping body, 21: encapsulating film, 22: score line, 23 : Tongue.

Claims (2)

[Scope of utility model registration request] 1. A tack label for breaking, which is affixed to an envelope film of a microwave-processed product package, wherein a pressure-sensitive adhesive layer (13) for attachment to the surface of the envelope film is a base film. It is coated on the back surface of (11) excluding the edge that will be the picking allowance (12), and is heated by a microwave to form the heat-affected zone that becomes the break-starting end of the encapsulating film. A tack label for breaking a microwave-processed product package, wherein a layer (14) made of a heat-generating substance is laminated on the coated surface of the pressure-sensitive adhesive layer (13). 2. A product packaging for microwave treatment, characterized in that the tack label according to claim 1 is attached to the surface of an encapsulating film (21) via an adhesive layer (13) on the back surface. body.