JPH061811Y2 - Film for packaging - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to improvement of a film for packaging various sticky materials at room temperature, such as a hot melt agent (prior art). Gum base, vulcanized rubber, starch syrup, etc. are usually sticky materials at room temperature, so the packaging should be at least a plastic film that has been subjected to a release treatment on the packaging surface on the side that comes into contact with the materials. The actual situation is that they are packaged.

Here, the structure of the packaging film used for packaging the material will be described. Usually, at least one surface of a transparent film is subjected to a release treatment, and the surface side subjected to the release treatment is the material. It is packaged so that it comes into contact with.

(Problems to be solved by the invention) By the above-mentioned conventional packaging film, a material (usually a lump) (such as a hot melt agent) that is adhesive at room temperature (hereinafter, simply referred to as "material") is used. When packaging, the packaging film is opened, and when attempting to take out the packaged material, a broken piece of the packaging film tends to adhere to the surface of the package, and the film itself is colorless and transparent. Therefore, even if a fractured piece is attached, it can not be easily confirmed from the outside unless it is observed very carefully,
It was often overlooked, and the material was likely to be subjected to post-processing as it was (while the fractured piece was still attached). In addition, as described above, it is impossible to avoid adversely affecting the quality of the product due to the post-processing due to the inclusion of the foreign matter, and there is a problem particularly in the use requiring high purity.

(Means for Solving the Problems) In order to solve the above-mentioned problems in the conventional art, the present invention provides a packaging film with a fractured piece from the outside even if it adheres to an adhesive material at room temperature. It is an object of the present invention to provide a packaging film which can be confirmed immediately and which can be easily removed.

The present invention has been devised to achieve such an object, and its gist is to provide a hue that is at least distinguishable from the color of the material to be packaged that is adhesive at room temperature. At least one surface of a composite plastic film obtained by sticking two transparent plastic films together through the colored adhesive of (3) is subjected to a mold release treatment.

(Example) Hereinafter, the packaging film of the present invention will be described in more detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 is a packaging film body, 2 is a plastic film, and a colored adhesive layer 3 is interposed between the two plastic films, whereby the plastic film is attached. Combined and integrated. Reference numeral 4 denotes a release coat layer provided on at least one surface of the plastic film 2.

Here, the plastic film is a polyester film, a polyethylene film, a polypropylene film, a polyamide film, or the like, and these plastic films need to be transparent so that the colored adhesive layer 3 can be confirmed from the outside. .

Further, the colored adhesive layer 3 means an adhesive layer for dry laminating such as urethane type, acrylic type, polyamide type and the like, and an adhesive layer for extrusion laminating such as polyolefin, and as the colorant, an inorganic pigment or an organic pigment is used. Although it can be used regardless of the type, it is particularly important to select a color having a hue that is at least distinguishable from the color of the material to be packaged.

It should be noted that the amount of the pigment added to the adhesive resin needs to be at least such that the colored state can be sufficiently confirmed from the outside. Further, the release treatment means a silicon coating treatment, and other treatments may be used as long as they have the same effect.

(Function) The present invention configured as described above, in the case where the adhesive material is packaged at room temperature, the packaging is unpacked as necessary, and when the material in the package is taken out, the broken piece is attached to the material by any chance. Even so, since the hue of the fractured piece is clearly distinguishable from the hue of the material, the identification can be made immediately and the presence or absence of the adhesion can be easily grasped.

(Effects of the Invention) The packaging film of the present invention comprises two transparent plastic films formed through a colored adhesive having a hue at least distinguishable from the color of the material to be packaged, which is sticky at room temperature. Since at least one surface of the laminated composite plastic film is subjected to a mold release treatment, the following unique effects are exhibited.

(1) When the packaging film is unpacked and the material is taken out, even if the fractured piece of the packaging film is attached to the material to be packaged that is sticky at room temperature, the hue of the fractured piece is the same as the hue of the material. Since they are so different that they can be identified very easily, the attachment of fractured pieces can be immediately confirmed from the outside,
Therefore, the broken pieces can be removed very easily.

(2) Due to the presence of the plastic film, the colorant does not adversely affect the material to be packaged at the time of use, the material can be subjected to post-processing, there is no fear of discoloration, and the solvent resistance is good. Becomes

(3) The film itself is not colored, and the existing film can be used to manufacture even a small production unit.

[Brief description of drawings]

FIG. 1 is a partially enlarged sectional view of the packaging film of the present invention. 1 ... Packaging film, 2 ... Plastic film, 3 ...
Colored adhesive layer, 4 ... Release coat layer.

Claims (1)

[Scope of utility model registration request] 1. A composite plastic film obtained by laminating two transparent plastic films via a colored adhesive having a hue at least distinguishable from the color of the material to be packaged, which is sticky at room temperature. A packaging film, characterized in that at least one side thereof is subjected to a release treatment.