JPH0535351U - Adhesive sheet for concealing items on postcards - Google Patents

Abstract

(57) [Summary] [Purpose] An adhesive sheet that conceals the contents of postcards will be improved so that the proper tampering prevention function and information storage function can be exerted even if care is not taken in handling. [Structure] The inventor first applied synthetic resin to the cover sheet 1 to form a clear ink layer 3'on the satin finish, then applied the adhesive layer 4 to the printed surface and bonded the release paper 5 to it. Although a pressure-sensitive adhesive sheet having a structure was devised, the present invention succeeded in improving brittleness by using a relatively poorly adhesive ink containing a filler as the printing ink layer 3. As a result, the above-mentioned object can be achieved, and the result can contribute to the improvement of the process control of the production line.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the production of a pressure-sensitive adhesive sheet for concealing the description of a postcard, which is used by being attached to the surface of the postcard, mainly for concealing the description of the postcard.

[0002]

[Prior Art]

 Recently, instead of mailing a document in a sealed form to prevent the contents from being seen by anyone other than the recipient, a postcard format that allows the recipient to remove the covering and learn the contents has come into use. ..

This type of postcard is formed by laminating a transparent film on a cover sheet so that the transparent film can be easily peeled off, and applying a pressure-sensitive adhesive to the back surface of the transparent film to attach it to the surface of the postcard. It is multi-layered, and if the recipient peels off the cover, a document covered with a transparent film appears, and the recipient can see the contents through the transparent film, confirm the fact of whether or not it is opened and save it. It is characterized by a guarantee.

[0004] The inventor of the present invention did not need a complicated layer form on the surface of the postcard in the actual Kaihei 2-1407070, and just stuck it like a normal label, and the recipient could use the same method as the conventional laminating method. We have devised an inexpensive adhesive sheet that can be handled and can know the fact of whether it is stored or unsealed and confirmed that it is practically effective.

[0005]

[Problems to be solved by the device]

 Although the earlier application solved most of the conventional problems, we discovered a new issue to be improved in the process of putting the device into practice.

FIG. 4 is a sectional partial view showing an example of the structure of the pressure-sensitive adhesive sheet of the prior application.

A transparent or colored transparent ink having poor adhesiveness is applied or printed on the entire or a part of the back surface of the cover sheet 1 to form a transparent ink layer 3 ′, and a transparent or colored adhesive agent on the same back surface. A pressure-sensitive adhesive sheet having layer 4 formed by coating. Fig. 5 shows a cross-sectional partial view of using this on a backing sheet. If you try to peel off the front cover after pasting on the backing sheet 8, the adhesive layer 4 will form a thin layer and stick to the backing sheet surface. After that, the transparent ink layer 3'printed on the cover will be peeled off from the cover, exposing the satin surface 6 and remaining on the surface of the adhesive to cover the backing surface, so once peeling off the cover, reattach it again. Not only becomes impossible, but also when trying to peel off the part attached to the backing 8, it will fragment and remain on the backing surface, so it can be used to prevent falsification of the information written on the backing surface. It was a thing.

The above is the case where the function can be properly exhibited by the normal use, but the carelessness of the person handling the case may prevent the function from being exhibited. An example thereof will be described with reference to FIGS. Fig. 6 shows a case where a part of the pressure-sensitive adhesive layer is not completely adhered to the backing sheet 8 and a floating portion 9 is partially formed. Alternatively, as shown in FIG. 7, it is a case where a person who attempts to peel off attempts to peel it off from the portion 10 of the pressure-sensitive adhesive layer 4 that contacts the mount surface. By these actions, in an extreme case, as shown in FIG. 8, the information writing surface 11 of the mount is peeled off while being stuck to the adhesive layer, and the information writing surface 11 is actually destroyed as shown in FIG. Will be done. At that time, fortunately, even if the destruction did not reach the information recording surface 11 and the adhesive layer was only destroyed as shown in Fig. 7, the information recording surface 11 was partially or entirely exposed. Become. Therefore, even if the recipient does it himself, if a third party does it, the tampering prevention cannot be protected.

The present invention has been made for the purpose of solving the above problems caused by the technology of the prior application, and the purpose thereof is to avoid the careless handling of the sender and the receiver. The company intends to provide a pressure-sensitive adhesive sheet that can exhibit its genuine tampering prevention function and information storage function.

[0010]

[Means for Solving the Problems] In order to achieve the above object, the pressure-sensitive adhesive sheet of the present invention makes the printing ink layer brittle to an appropriate condition, so that the sender or the recipient can handle it deficiently. Even so, it imparts the ability to return to the function where the peeling proceeds on the matte surface of the printing ink layer, which is the original peeling point. Hereinafter, the present invention will be described with reference to examples.

[0011]

【Example】

 FIG. 1 is a partial sectional view of an adhesive sheet according to an embodiment of the present invention.

When the present invention is viewed as a laminated structure, there is almost no difference from the prior application shown in FIG. However, the transparent ink layer 3'of the earlier application and the printing ink layer 3 of the present application are completely different in composition composition.

As the paper, the plastic film, and the metal foil used for the cover sheet 1, those having a concealing property that are commonly used in the printing industry, the adhesive processing industry, etc. may be used by a conventional method as in the previous application. As for the synthetic resin layer 2, as in the previous application, the cover sheet 1 is coated or laminated with a colorless or colored synthetic resin material having good adhesiveness. Providing the satin-finished surface 6 on the surface of the resin layer by a conventional method is the same as in the previous application. As the adhesive for forming the adhesive layer 4 and the release paper 5, those commonly used in the adhesive processing industry are also used by a conventional method. However, the transparent ink commonly used in the printing industry can be used for the printing ink layer 3, and the transparent ink is further mixed with an appropriate amount of a filler to promote the embrittlement effect to form the printing ink layer 3. .. As the filler, fine powder of inorganic compounds such as silica, clay, glass beads, calcium carbonate, and fine powder of organic compounds such as resin can be used. The addition amount of these depends on the layer thickness of the printing ink layer, but it is necessary to stop it so as not to obstruct the reading of the description, so from the practical viewpoint it should be kept within 20% of the transparent ink amount. Then, it was found that the embrittlement effect can be used without hindrance within this range.

The pressure-sensitive adhesive sheet thus formed can be used by directly removing the release paper 5 and directly pasting it on the postcard just as in the prior application. When the cover sheet 1 is peeled off after use, the cover sheet is peeled off leaving the printing ink layer 3 on the surface of the pressure-sensitive adhesive layer 4 and the adhesive state is not restored again. At the same time, the pressure-sensitive adhesive layer 4 remains semipermanently on the postcard surface, and the printing ink layer 3 adheres to and covers the surface of the pressure-sensitive adhesive layer 4 to form a film-like layer. Moreover, the surface of the printing ink layer 3 has the matte surface irregularities of the surface of the synthetic resin layer 2 transferred and left as a female type, which diffuses the light to make it easier to see the letters and figures on the postcard, and it is also possible to write with a writing instrument. become. Furthermore, when a part of the adhesive layer is left unattached to the mount 8 as shown in FIG. 6, the adhesive layer 4 is destroyed and the printing ink layer 3 is fragile as shown in FIG. Since it breaks and the crack reaches the satin surface immediately, it can return to the function of promoting regular peeling. Even when the adhesive layer 4 is peeled off from the surface of the mount as shown in Fig. 7, the destruction of the adhesive layer 4 induces cracks in the printing ink layer within a short time as shown in Fig. 3. It is possible to return to normal peeling in exactly the same manner as in the example of FIG.

As a result of improving the pressure-sensitive adhesive sheet according to the present invention, a new effect can be obtained in the case of factory production. Since the brittleness of the film greatly affects not only the physical properties of the ink but also the film thickness, it is necessary to strictly control the ink coating thickness if the strength range that makes the ink layer brittle is controlled in factory production. You must give top priority.

In the present invention, the addition of a filler, which imparts a brittle effect to the extent that transparency is not impaired, is added to the printing ink, so that the coating thickness can be slightly changed in a lined production process. However, the brittleness effect of the printing ink layer has become more stable than before. Therefore, the process control on the production line has been further relaxed, and the work steps and operations can now be performed more easily and at lower cost than the previous application.

[0017]

[Effect of the device]

 The pressure-sensitive adhesive sheet of the present invention is made by applying a synthetic resin on the cover, printing it with a brittle ink that is easy to peel off, printing it with a commonly used adhesive, and then sticking the release paper together. It is not necessary to stack a transparent film for protecting the information writing surface to take a simple process. Of course, when this sheet is used, it can be used without any difference from the pasting of ordinary pressure-sensitive adhesive sheets and labels as in the previous application, and no skill is required. In particular, by adding a filler that imparts a brittle effect to the printing ink to the extent that transparency is not impaired, even if the sender or receiver does not care to handle it, a third party may conduct anomalous falsification. Even if you do, you can exercise the proper tampering prevention function and information saving function. In addition, the printing ink layer that covers the backing surface contains a filler, and the surface has a synergistic effect with satin finish to further improve the writing aptitude, and the surface lightness is suppressed more than the previous application. The contents on the backing sheet are easier to read. Furthermore, even if a slight variation in coating thickness is allowed in the line production process, a stable brittleness effect can be obtained in the printing ink layer, process control in the production line is eased, and the work stage and operation are more than the previous application. It was also found that it could be implemented easily and at low cost.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional partial view of an adhesive sheet of the present invention.

FIG. 2 is a schematic cross-sectional partial view when using an adhesive sheet showing the function of the present invention.

FIG. 3 is a schematic cross-sectional partial view when using an adhesive sheet showing the function of the present invention.

FIG. 4 is a schematic cross-sectional partial view of the pressure-sensitive adhesive sheet of the prior application.

FIG. 5 is a schematic cross-sectional partial view showing a peeled state when the pressure-sensitive adhesive sheet of the prior application is used.

FIG. 6 is a schematic partial sectional view showing an irregular use condition of the prior application.

FIG. 7 is a schematic partial sectional view showing an irregular use condition of the prior application.

FIG. 8 is a schematic cross-sectional partial view showing an example of a mount breakage accident caused by the irregular use of the pressure-sensitive adhesive sheet of the prior application.

FIG. 9 is a schematic perspective view showing an example of a mount breakage accident caused by an irregular use of the pressure-sensitive adhesive sheet of the prior application.

[Explanation of symbols]

 1 Cover 2 Synthetic resin layer 3 Transparent ink layer 3'Printing ink layer 4 Adhesive layer 5 Release paper 6 Rough ground 7 Filler particles 8 Mount 9 Floating part 10 Part 11 Information surface

Claims (1)

[Scope of utility model registration request] 1. A colorless or colored synthetic resin layer is provided on the entire back surface of a cover having a concealing property or a cover made of a plastic film or a metal foil, and the surface of the synthetic resin layer is treated with satin, and then the pear is treated. Apply a relatively poorly-adhesive ink with a filler that imparts a brittle effect on the entire surface or partly, and then apply a transparent colorless or colored transparent adhesive to the entire surface to form a release paper. A pressure-sensitive adhesive sheet for concealing information on a postcard, which is covered and protected.