JPH08241040A - Concealing member - Google Patents

Abstract

PURPOSE: To omit release paper, to facilitate the preservation and to make second affixation difficult by laminating pseudo adhesive member layers on one surface of a paper base, laminating a specific transparent film on its surface and providing the surface thereof with a thermosensitive adhesive layer. CONSTITUTION: The pseudo adhesive member layers 3, 4 are laminated on one surface of the paper base material 1 and further, the transparent film 6 subjected to a peel treatment on one surface is laminated via a tacky adhesive layer 5 on the surfaces of the pseudo adhesive member layers 3, 4 by bringing its release treated surface into contact with the tacky adhesive layer 5. The surface of the transparent film 6 is provided with the thermosensitive adhesive layer 7. In such a case, this concealing member is capable of coating a concealed information display surface by heat sealing the member to the concealed information display surface of a sheet-like member. When this concealing member is peeled, the member is peeled at the boundary between the transparent film 6 subjected to the peel treatment and the tacky adhesive layer 5. The transparent film 6 remains adhered on the concealed information display 2 via the thermosensitive adhesive layer 7 and the secondary concealing member successively laminated with the pseudo adhesive member layers 3, 4 and the tacky adhesive layer 5 on the paper base material 1 is stripped away.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concealing member, and more particularly to a concealing member for covering and concealing concealment information displayed on a concealment information member such as a postcard or a card.

[0002]

2. Description of the Related Art Conventionally, there has been known a concealing member for concealing concealment information by covering the surface of a concealment information member on which concealment information such as a postcard is displayed. Further, there is also known a concealing member capable of covering the concealment information displayed on the communication surface of the reciprocal postcard and the concealment information described on the reply surface of the reciprocal postcard. A concealing member for a conventional postcard is subjected to concealment printing on one surface of paper, and a pseudo adhesive member layer in which a polyethylene layer and a polyester layer are pseudo-adhered is laminated on the surface of the concealed printing surface, and further, a pseudo adhesive member layer. Laminate a transparent film on one surface of which the release treatment is applied via an adhesive layer so that the release-treated surface contacts the adhesive layer, and further cover the surface of the transparent film with the adhesive layer, and finally the adhesive layer The one whose surface was coated with a release-treated release paper was used.

[0003]

However, since the conventional concealing member has a release paper attached to its adhesive surface, it is bulky and requires a lot of storage space, which is a storage problem. was there. Further, there is a problem that the work of peeling off the release paper is complicated at the time of use. The present invention has been made in view of the above-mentioned state of the art, and even if the covert information display surface is once covered and then peeled off, another covert information display surface is covered without using a release paper. It is an object of the present invention to provide a concealing member that can be removed and is difficult to re-attach the peeled concealing member when peeled off after the second covering of the concealment information display surface.

[0004]

Means for Solving the Problems As a result of intensive studies for solving the above-mentioned problems, the inventors have laminated a pseudo adhesive member layer on one surface of a paper base material and formed a pseudo adhesive member layer on the surface of the pseudo adhesive member layer. By laminating a transparent film whose surface is subjected to a release treatment via an adhesive layer and providing a heat-sensitive adhesive layer on the surface of the transparent film, the release paper can be omitted, and the above-mentioned object can be achieved. They have found the present invention and have completed the present invention based on this finding.

That is, the present invention is a concealing member for sticking to the concealment information display surface of a sheet-shaped member on which concealment information is displayed, and a pseudo adhesive member layer is laminated on one surface of a paper base material. Further, a transparent film having one surface subjected to a release treatment via a pressure-sensitive adhesive layer on the surface of the pseudo adhesive member layer is laminated with the release-treated surface in contact with the pressure-sensitive adhesive layer, and a heat-sensitive adhesive layer is provided on the surface of the transparent film. The concealing member is characterized by being provided with. Hereinafter, the present invention will be described in detail.

The concealing member of the present invention is for covering the concealment information by covering the concealment information display surface of the sheet-shaped member on which the concealment information is displayed. Examples of the sheet-shaped member include postcards and cards. Here, the hidden information is
PIN of the deposit account, deposit balance, which you do not want others to know
This is information that should be concealed, such as loan repayment balance.

In the concealing member of the present invention, a pseudo adhesive member layer is laminated on one side of a paper base material. Examples of the paper substrate include various papers such as impregnated paper, cellophane paper, high-quality paper, art paper, kraft paper, coated paper, lightweight coated paper, and synthetic paper, and preferably high-quality paper, coated paper, art paper,
Papers such as impregnated papers, synthetic papers and laminated sheets of these or laminated sheets of these and plastic films.
The thickness of the paper substrate is not particularly limited, but is usually 30 to 200 μ.
m, preferably 50 to 150 μm. The paper base material needs to be made of an opaque material so that the concealment information cannot be seen through from above, and it is preferable that the surface of the paper base material in contact with the pseudo adhesive member layer is subjected to concealment printing.

The paper base material and the pseudo adhesive member layer are firmly or pseudo adhered to each other. As a method of firmly adhering as described above, for example, when one layer constituting the pseudo adhesive member layer is a polyethylene resin layer, polyethylene resin is put into an extruder and melted, and the polyethylene resin film is extruded from a T die of the extruder. There is a method of laminating and laminating on the surface of a paper base material and cooling and solidifying. In addition, there is also a method of firmly adhering the paper base material and the pseudo adhesive member layer with an adhesive. As a pseudo-bonding method to be described later, for example, when the pseudo-bonding member layer is a polyethylene resin layer, the polyethylene resin is put into the extruder and the polyethylene resin film is slightly lower than the melting temperature. There is a method of further extruding and laminating on the surface of a paper base material. In addition, there is also a method in which a resin having releasability is partially applied to a paper base material in advance, and a polyethylene resin film having a melting temperature is extruded and laminated on the surface thereof. The pseudo-adhesive member layer is composed of at least one layer, and the pseudo-adhesive interface is an interface between the pseudo-adhesive member layer and the paper base material layer, and the pseudo-adhesive interface is composed of two or more layers. It may be an interface existing in the member layer. The pseudo adhesive member layer is preferably a laminate of two layers. The two layers are bonded with a weak bonding force at the pseudo adhesive interface. It is necessary that the pseudo adhesive force of the pseudo adhesive interface is stronger than the adhesive force of the interface between the pressure-sensitive adhesive layer provided in the concealing member and the transparent film whose surface is peeled off. When the concealment member attached to the surface is peeled off, peeling occurs at the interface between the pressure-sensitive adhesive layer and the transparent film whose surface is treated for peeling, while peeling does not occur at the pseudo-bonding interface present in the pseudo-bonding member layer. It is necessary to do so.

Examples of the pseudo-adhesive member layer include, for example, a pseudo-adhesive member layer made of a polyethylene resin layer and a polyester resin layer, a pseudo-adhesive member layer made of a polyethylene resin or a polypropylene resin layer, and preferably a polyethylene resin layer. It is a pseudo adhesive member layer made of a polyester resin layer. Examples of the polyester resin used in the polyester layer include polyethylene terephthalate resin and polybutylene terephthalate resin, with polyethylene terephthalate resin being preferred. The pseudo adhesive member layer is formed by laminating a polyethylene resin and a polypropylene resin on the polyester resin layer at a low melt extrusion temperature and laminating the polyethylene resin layer and the polyester resin layer, or by melt-extruding the polyethylene resin or the polypropylene resin. A method of laminating a polyethylene resin or polypropylene resin layer on a paper base material at a low temperature and laminating it on a paper base material may be used. The pseudo-adhesive member layer needs to be transparent enough to allow the layer between the pseudo-adhesive interface between the layers and the surface in contact with the pressure-sensitive adhesive layer to allow the hidden information to be seen therethrough. The thickness of the pseudo adhesive member layer may be in the range of usually 10 to 300 μm for each layer constituting the pseudo adhesive member layer, and is preferably in the range of 15 to 200 μm.

In the concealing member of the present invention, a transparent film whose one surface is peeled through a pressure-sensitive adhesive layer is laminated on the surface of the pseudo-adhesive member layer with the peel-treated surface in contact with the pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer provided on the surface of the pseudo adhesive member layer is
It is composed of at least one kind of adhesive, for example, natural rubber adhesive, synthetic rubber adhesive, acrylic resin adhesive, polyvinyl ether resin adhesive, urethane resin adhesive, silicone resin adhesive, etc. Is mentioned.
Specific examples of the synthetic rubber-based adhesive include styrene-butadiene rubber, polyisobutylene rubber, isobutylene-isoprene rubber, isoprene rubber, styrene-isoprene block copolymer, styrene-butadiene block copolymer, styrene-ethylene-butylene block. Copolymer,
Examples thereof include ethylene-vinyl acetate thermoplastic elastomer. Specific examples of the acrylic resin adhesive include homopolymers of acrylic acid, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, ethyl methacrylate, butyl methacrylate, acrylonitrile and the like. Or a copolymer etc. are mentioned. Specific examples of the polyvinyl ether resin-based adhesive include polyvinyl ether and polyvinyl isobutyl ether. Specific examples of the silicone resin-based adhesive include dimethylpolysiloxane. Among these adhesives, acrylic resin-based adhesives are preferable, and acrylic resin-based adhesives in which polar monomers such as acrylic acid and methacrylic acid are 10% by weight or less are particularly preferable. . These adhesives can be used alone or in combination of two or more.

If necessary, a tackifier, a filler, a softening agent, a heat and light stabilizer, an antioxidant, a cross-linking agent and the like can be added to the above-mentioned pressure-sensitive adhesive. Examples of the tackifier include rosin resins, terpene phenol resins, terpene resins, aromatic hydrocarbon-modified terpene resins, petroleum resins, coumarone-indene resins, styrene resins, phenol resins, and xylene resins. Examples of the filler include zinc white, titanium oxide, silica, calcium carbonate, barium sulfate and the like. Examples of the softening agent include process oil, liquid rubber and plasticizer. Examples of the heat-light stabilizer include benzophenone-based, benzotriazole-based, hindered amine-based and the like, and antioxidants include anilide-based, phenol-based, phosphite-based,
Examples thereof include thioester type.

When the anchoring property of the pseudo adhesive layer and the pressure sensitive adhesive is insufficient, the surface of the pseudo adhesive member layer coated with the pressure sensitive adhesive is subjected to corona discharge treatment, or polyester resin, urethane resin, chlorinated polyolefin resin or the like is used as a main component. It is preferable to provide a primer layer by applying a primer containing a filler if necessary. As the filler, various fillers such as silica, calcium carbonate, magnesium carbonate, kaolin, calcined clay, bentonite, zeolite, talc and diatomaceous earth can be used. The pressure-sensitive adhesive layer may have any transparency as long as the hidden information can be seen through the pressure-sensitive adhesive layer.

The pressure-sensitive adhesive layer may be provided on one surface of the pseudo-adhesive member layer by various methods. For example, the above-mentioned pressure-sensitive adhesive may be dissolved in a suitable solvent and applied.
Examples thereof include a method of coating by dispersing or emulsifying in an appropriate medium, a method of coating without solvent or a method of coating with a calender roll. Of these methods, the preferred method is
It is a solvent dissolution method in which a solvent is dissolved and then applied. The thickness of the pressure-sensitive adhesive layer is not particularly limited and is usually 10 to 1
The range may be 00 μm, preferably 20 to 50 μm.
m.

The transparent film laminated on the pressure-sensitive adhesive layer and having one surface peeled off may be one having transparency such that the hidden information can be seen through the transparent film.
Suitable examples of this transparent film include transparent paper such as transparent glassine paper, polyolefin resin such as polyethylene resin and polypropylene resin, transparent plastic film such as polyester resin such as polybutylene terephthalate resin and polyethylene terephthalate resin, and the like. However, it is not limited thereto. The surface of this transparent film is peeled off with a silicone resin, an alkyd resin or the like. Although the degree of peeling treatment is not particularly limited, it may be such that it usually maintains the adhesion between the pressure-sensitive adhesive and the transparent film and is weaker than the peeling of the pseudo adhesive member layer. The thickness of the transparent film may be appropriately selected, but is usually in the range of 10 to 200 μm, preferably 2
It is in the range of 0 to 100 μm.

In the present invention, a heat-sensitive adhesive layer is provided on the surface of the transparent film. As the heat-sensitive adhesive used in the heat-sensitive adhesive layer, various heat-sensitive adhesives can be used, for example, ethylene-vinyl acetate copolymer, ethylene-acrylic acid ester copolymer, phenoxy resin, nylon 1
1, nylon 12, saturated polyester, coumarone-indene resin, rosin, styrene-isoprene-styrene copolymer rubber, styrene-butadiene-styrene copolymer rubber, polyethylene resin, polyurethane resin, vinyl chloride resin, vinylidene chloride resin, polyvinyl alcohol, etc. And a homopolymer or a copolymer thereof, and preferably an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid ester copolymer, or a polyethylene resin. If necessary, the heat-sensitive adhesive may further contain additives such as a tackifier, a filler, a softening agent, a heat and light stabilizer, an antioxidant and a crosslinking agent. These additives are the same as those of the above-mentioned adhesive. The heat-sensitive adhesive is required to be transparent enough to allow the hidden information to be seen through from above, and when it is heated, the adhesive force is exhibited and the adhesive is firmly adhered. The heat-sensitive adhesive layer is firmly adhered to the concealment information display surface of the sheet-shaped member on which the concealment information is displayed, and when the concealment member adhered to the concealment information display surface is peeled off, adhesiveness is applied. It is necessary to prevent peeling at the interface between the agent layer and the transparent film whose surface has been subjected to a peeling treatment, while preventing peeling at the interface between the heat-sensitive adhesive layer and the hidden information display surface. The thickness of the heat-sensitive adhesive layer may be appropriately selected,
It is usually in the range of 3 to 100 μm, preferably 5 to 50.
It is in the range of μm. The heat-sensitive adhesive has no adhesive force at room temperature and does not adhere to other members even when it comes into contact with the other members. Therefore, it is not necessary to attach release paper to the surface.

[0016]

The concealing member of the present invention covers the concealment information display surface by heat-sealing the heat-sensitive adhesive layer provided on the surface of the concealment information display surface of the sheet-shaped member on which the concealment information is displayed. can do. Then, when the concealing member was peeled off in order to see the concealment information, it was peeled off at the interface between the transparent film which had been subjected to the peeling treatment and the adhesive layer, and the transparent film adhered to the concealment information display surface via the heat-sensitive adhesive layer. The secondary concealing member in which the pseudo adhesive member layer and the pressure-sensitive adhesive layer are sequentially laminated on the paper base material is peeled off. as a result,
The hidden information can be seen through on the transparent film. In the present invention, another concealment information display surface can be covered with the secondary concealment member by adhering another concealment information display surface with the adhesive layer of the stripped secondary concealment member. . Further, when the secondary concealing member is peeled off in order to see the other concealment information, the second concealing member is peeled off at the pseudo-bonding interface of the pseudo-bonding member layer, not at the pressure-sensitive adhesive layer adhered to the masking information display surface. As a result, the concealment information can be seen through from the layer that constitutes the pseudo-adhesion layer that remains adhered to another concealment information display surface via the adhesive layer.
Further, it is difficult to bond the pseudo adhesive member layer once it has been peeled off at the pseudo adhesive interface, and it is possible to prevent the above-mentioned other hidden information from leaking. The concealing member of the present invention is particularly useful for concealing a reciprocal postcard or the like.

[0017]

EXAMPLES Next, the present invention will be described more specifically by way of examples. The present invention is not limited to these examples.

Example 1 FIG. 1 is a sectional view showing an example of the concealing member of the present invention. The concealing printing layer 2 is provided on one surface of the paper base material 1 (fine paper, thickness: 75 μm), and cannot be seen through from above the paper base material 1. A polyethylene resin layer 3 (thickness: 17 μm) is strongly adhered to the surface of the concealed printing layer 2 by melt lamination, and further, a polyethylene terephthalate resin layer 4 (thickness: 17 μm) is formed on the surface of the polyethylene resin layer 3. Is pseudo-bonded. The polyethylene resin layer 3 and the polyethylene terephthalate resin layer 4 constitute a pseudo adhesive member layer, and they can be separated at the interface between the polyethylene resin layer 3 and the polyethylene terephthalate resin layer 4. Further, on the surface of the polyethylene terephthalate resin layer 4, an adhesive (100 parts by weight of an acrylic copolymer obtained by copolymerizing 95 parts by weight of n-butyl acrylate and 5 parts by weight of acrylic acid) with 12 parts of hydrogenated terpene phenol was added. The adhesive layer 5 (thickness: 30 μm) is provided by applying 4 parts by weight of a pressure-sensitive adhesive containing 4 parts by weight of isocyanate as a cross-linking agent, and the pressure-sensitive adhesive layer 5 and the polyethylene terephthalate resin layer 4 are strongly bonded. ing.

On the other hand, on the other surface of the adhesive layer 5, a transparent film 6 whose one surface is surface-treated with a silicone release agent is used.
(Transparent glassine paper, thickness: 30 μm) are laminated so that they can be peeled off with a weak force at the interface between the transparent film 6 and the adhesive layer 5. Further, on the back surface of the transparent film layer 6, a heat-sensitive adhesive (trade name: SK Dyne,
Soken Chemical Co., Ltd.) is applied to a thickness of 10 μm to form a heat-sensitive adhesive layer 7, and heat-sealed on the concealment information display surface to cover the concealment information displayed on the surface of a postcard or the like. This enables strong adhesion. This concealing member can cover the concealment information display surface by heat-sealing the concealment information display surface. When the concealment member attached by heat sealing is peeled off and the concealment information is viewed, the peeling-treated surface of the transparent film 6 and the adhesive layer 5
It can be peeled off with a weak force at the interface. At this time, the pseudo adhesive interface does not peel off. The hidden concealing member is
It serves as a secondary concealing member, and the surface thereof is the adhesive layer 5.

FIG. 2 shows a state in which the concealing member covers the concealment information display surface of a postcard of a reciprocal postcard, and one end of the concealment member is turned to see the concealment information. Shows. The concealed concealing member becomes a secondary concealing member. FIG. 3 shows a state in which necessary concealment information such as a signature, data description, and stamp is described on the reply postcard, and then a secondary concealment member is attached to cover the concealment. The surface of the secondary concealing member has an adhesive layer 5
And can be easily attached to the hidden information display surface.

[0021]

Since the concealing member of the present invention is not provided with the release paper, it is not bulky as compared with the conventional one and is easy to store. Furthermore, even if it is peeled off to see the hidden information after covering the hidden information display surface, it can be covered on another hidden information display surface, and it is peeled off after the second covering of the hidden information display surface. In this case, it is difficult to reattach the peeled concealing member.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a concealing member that is an embodiment of the present invention.

FIG. 2 is a cross-sectional view when the concealing member of FIG. 1 is attached to a postcard of a reciprocal postcard.

FIG. 3 is a perspective view showing a state in which the secondary concealing member is peeled off from the concealing member that has been adhered to the postcard of the reciprocal postcard of FIG. 2 and is adhered to the concealment information display surface of the reply postcard. Is.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper base material 2 Concealment printing layer 3 Polyethylene resin layer 4 Polyethylene terephthalate resin layer 5 Adhesive layer 6 Transparent film 7 Heat-sensitive adhesive layer 8 Secondary concealment member 11 Reply postcard 12 Releasing postcard 13 Peeling remainder 14 Secondary concealment member

Claims (1)

[Claims] 1. A concealing member for sticking to a concealment information display surface of a sheet-shaped member on which concealment information is displayed, wherein a pseudo adhesive member layer is laminated on one surface of a paper base material, and further, a pseudo adhesive member layer. On the surface of the adhesive member layer, a transparent film whose one surface is subjected to a release treatment via an adhesive layer is laminated with the release treated surface in contact with the adhesive layer, and a heat-sensitive adhesive layer is provided on the surface of the transparent film. A concealing member characterized by being present.