JPH0516605Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a method of attaching a material to the surface of a postcard, etc., in order to hide important information written on the postcard, etc., so that it cannot be read by anyone other than the person concerned. This invention relates to a removable concealment label for use in

(Problems to be solved by the prior art and the invention) Conventionally, it has been common to use sealed letters to notify customers of important information, such as deposit balances at post offices or banks, by mail. Ta.

However, recently, postcards are cheaper than sealed letters, and opaque concealing paper that is removably attached to the surface of the postcard is used to reveal the information written on the surface of the postcard to the parties involved. There are some things that make it unreadable to others.

Some types of concealment paper are simply opaque concealment paper that is removably attached to the surface of the postcard using an adhesive, but in this case, when it is peeled off, the information written on the surface of the postcard is removed. This was undesirable as it could cause damage.

To solve this problem, an opaque concealing paper is removably pasted on the top surface of the transparent film, and an adhesive for the object to be concealed is applied to the bottom surface, making it possible to separate the gap between the concealing paper and the transparent film layer. Configure it to
There is a method in which only a transparent film layer is left on the postcard when it is peeled off, so that the information written on the postcard can be read through it (see Utility Model Application Publication No. 62-9571). However, in this case, even when the postcard is attached, the information written on the surface of the postcard may be visible, making it undesirable to apply this to important information.

As shown in Fig. 8, this problem can be solved by interposing an aluminum foil 3' between the concealing paper 1' and the transparent synthetic resin layer 2', such as polyethylene, to conceal the information to be concealed. There are some that are constructed so that they are even less transparent. In this case, the adhesiveness between the aluminum foil 3' and the transparent synthetic resin layer 2' is not good even at high temperatures and it is impossible to heat seal, so it is impossible for anyone other than the person concerned to peel off the concealing paper and read the information. To prevent this, apply an adhesion promoter (or fixing adhesive) to an appropriate location between the aluminum foil 3' and the transparent synthetic resin layer 2' in advance.
4', 4' are interposed to form a strong adhesion site between the aluminum foil 3' and the transparent synthetic resin layer 2', so that if a third party tries to forcibly remove the concealing paper 1', ,
Usually, the structure is such that the transparent synthetic resin layer 2' tears off along with the peeled portion so that it can be determined that information has leaked. However, in this case, it is necessary to apply adhesion promoters 4', 4' to predetermined positions on the lower surface of the aluminum foil 3' in advance, corresponding to the parts of the surface of the postcard etc. that should be hidden, which complicates the manufacturing process. This led to an increase in product costs.

This invention was devised to solve these problems, and it is impossible for a third party to peel off the concealing paper and read the written information, and it does not require a complicated manufacturing process. The objective is to provide an inexpensive concealment label.

(Means for solving the problem) The concealment label of the present invention was devised in view of the above-mentioned problem, and its gist is that aluminum foil is pasted on the bottom surface of the base paper. A transparent resin layer with excellent aluminum adhesion properties at high temperatures is formed on the lower surface, and the base paper and aluminum foil are integrally configured to be peelable from the transparent resin layer. It is configured so that it can be attached to the object to be concealed via a transparent adhesive layer.

Furthermore, the concealing label of the present invention is characterized in that a predetermined location between the aluminum foil and the transparent resin layer is heat-sealed.

(Function) In the concealing label of the present invention, first, heat is applied to the area corresponding to the concealed area of the postcard etc. on which the information to be concealed is written, and the aluminum foil and the transparent resin layer are heat-sealed. After that, the six sides of the pressure-sensitive adhesive layer are pressed against the surface of a postcard or the like on which the information to be hidden is written, and the concealment label is affixed to the postcard or the like. next,
When reading the information written on a postcard, etc., if you peel off the concealing label from the part that corresponds to the inside part of the top surface of the base paper of the concealing label, the transparent resin left on the surface of the postcard, etc. can be removed. Written information can be read through the layer.

(Example) The concealing label of the present invention will be explained in more detail below based on the attached drawings.

FIG. 1 is an enlarged partial sectional view of one embodiment of the concealing label of the present invention, and in the figure, 1 indicates the concealing label of the present invention as a whole, which basically consists of an opaque A base paper 2, an aluminum foil 4 attached to the lower surface of the base paper 2 with an adhesive 3, a transparent resin layer 5 formed on the lower surface of the aluminum foil 4 and having excellent aluminum adhesion at high temperatures, and a transparent resin layer It is composed of a transparent pressure-sensitive adhesive layer 6 coated on the lower surface, and a release paper 7 adhered to the lower surface of this adhesive layer 6.

The concealing label 1 can also be attached to an object to be concealed via the adhesive layer 6 by peeling off the release paper 7, and the base paper 2 and aluminum foil 4 can be integrally bonded to the transparent resin layer 5. It is configured to be removable.

The transparent resin that has excellent aluminum adhesion at high temperatures is one that has weak adhesion to metal (aluminum foil in this case) at low temperatures (room temperature) and can be peeled off from the metal. In short, at high temperature (approximately 100 to 200
°C) A transparent resin that increases its adhesion to metals by melting it hot and solidifying it by cooling, and it is blended with polyethylene and extruded by keeping the extrusion temperature low. It may be formed in a peelable manner on the lower surface of the aluminum foil 4 by a lamination method. In addition, as described later, by heating (heat sealing) at the desired location,
A strongly bonded portion is formed between the aluminum foil 4 and the aluminum foil 4.

In addition, examples of such resin include EAA
Resin (a copolymer of ethylene and acrylic acid, which has a highly polar carboxyl group in the methylene chain and has very good adhesion to metals, etc., e.g. manufactured by Mitsubishi Yuka Co., Ltd.), ionomer (For example, product name "Himilan", manufactured by Mitsui Dupont Chemical Co., Ltd.), EMMA resin (a random copolymer of ethylene and methacrylic acid, which has very good adhesive strength to metals etc. due to hydrogen bonding),
For example, the product name "Nucrel" manufactured by Mitsui-Dupont Chemical Co., Ltd.), or the resin made from a terpolymer of ethylene, ethyl acrylate, and maleic anhydride (which has very good adhesion to metals etc. due to hydrogen bonding) For example, there are resins such as "Bondine" (trade name, manufactured by Sumitomo Chemical Co., Ltd.), but any other transparent resin having the above-mentioned properties can be used.

The adhesive 3 may be suitably selected from polyolefins such as polyethylene and polypropylene for extrusion lamination or wet lamination.

Furthermore, the transparent pressure-sensitive adhesive layer 6 is appropriately selected from acrylic and urethane adhesives, but any adhesive other than these can be used as long as it is transparent and pressure-sensitive.

Next, a method of using the concealing label of the present invention constructed as described above will be explained below.

As shown in Figures 2 to 5, first, place the concealment label 1 on the area corresponding to the concealed area of the postcard A on which the information to be concealed is written (the area indicated by the arrow in Figure 2). Then, heat is applied to heat seal the aluminum foil 4 and the transparent resin layer 5 (approximately 100 to 200° C.) to form strongly bonded portions 8, 8.

After that, the release paper 7 is peeled off from the concealing label 1, and the pressure-sensitive adhesive layer 6 is pressed against the surface of the postcard A etc. on which the information to be concealed is written, and the concealing label 1 is attached to the postcard A. Paste.

Next, when reading information written on a postcard or the like, a cut line 9, which is written in advance at a position corresponding to the inside of the firmly adhered parts 8, 8 on the top surface of the base paper 2 of the concealing label 1, is used. 9, use cutter knife B etc. to make a cut to a certain depth, then insert base paper 2 from this cut.
When the postcard A is peeled off, the information written on the surface of the postcard A that is peeled off between the transparent resin layer 5 and the aluminum foil 4 can be read through the transparent resin layer 5 that remains after peeling off.

FIG. 6 is an enlarged partial sectional view of another embodiment of the concealing label of the present invention, which basically has the same structure as the first embodiment described above, with the difference being that the concealing label 1. Intermittent perforation-like cuts 9', 9' are provided on the inside of the parts 8, 8, extending through the base paper 2, adhesive 3, and aluminum foil 4. When reading the information,
It is constructed so that the peelable portion 10 of the concealing label 1 can be easily peeled off without using a cutter knife or the like.

Furthermore, FIG. 7 shows yet another embodiment of the concealing label of the present invention, which basically has the same structure as the concealing labels of the first and second embodiments. , a plurality of concealing labels 1 are manufactured in a continuous manner, the release paper 7 is omitted, and the base paper 2 is manufactured.
A synthetic resin coating is laminated on the top surface of the machine so that the whole can be wound up into a roll. This makes it possible to automatically and save labor when pasting on objects to be concealed, such as postcards.

(Effects) The concealing label of the present invention is made by pasting aluminum foil on the bottom surface of the base paper, and forming a transparent resin layer that has excellent aluminum adhesion at high temperatures on the bottom surface of the aluminum foil.
The base paper and aluminum foil are integrally configured so that they can be peeled off from the transparent resin layer, and can be attached to the object to be concealed via a transparent adhesive layer coated on the lower surface of the transparent resin layer. (1) Since the aluminum foil is provided, the information written on the object to be concealed, such as a postcard, cannot be seen through. (2) A concealment label corresponding to the concealed area of a postcard, etc., on which information to be concealed is written. Simply apply heat to the area and heat seal the area between the aluminum foil and the transparent resin layer to form a strongly bonded area.
This simplifies the manufacturing process and reduces costs because it prevents a third party from peeling off the label and surreptitiously viewing the information written on it. By peeling off the concealing label from the area corresponding to the inside of the firmly adhered area on the top surface of the base paper of the label, it is possible to easily read the written information as needed, which is convenient. This is an excellent idea that is effective.

[Brief explanation of drawings]

FIG. 1 is an enlarged partial cross-sectional view of the first embodiment of the concealing label of the present invention, FIG. 2 is an enlarged partial cross-sectional view showing how to use the concealing label of the present invention, and FIGS. 3 to 5 are FIG. 6 is an enlarged partial sectional view of a second embodiment of the concealing label of the present invention, and FIG. 7 is a third embodiment of the concealing label of the present invention. FIG. 8 is an enlarged partial sectional view showing a conventional concealing paper. 1...Concealment label, 2...Base paper, 3...
Adhesive, 4... Aluminum foil, 5... Transparent resin layer, 6
...adhesive layer, 7 ... release paper, 9 ... score line, 9' ... cut, A ... postcard, B ... cutter knife.

Claims (1)

[Scope of claim for utility model registration] (1) Aluminum foil is pasted on the bottom surface of the base paper, and a transparent resin layer that has excellent aluminum adhesion properties at high temperatures is formed on the bottom surface of the aluminum foil. A concealing method characterized in that the foil is configured to be integrally removable from a transparent resin layer and can be attached to an object to be concealed via a transparent adhesive layer coated on the lower surface of the transparent resin layer. label. (2) The concealment label according to claim 1, wherein a predetermined location between the aluminum foil and the transparent resin layer is heat-sealed.