JPH04166393A - Laminating material - Google Patents

Abstract

PURPOSE:To look the content of data by simply peeling off a laminating material by providing a gap part where a thermal adhesive resin layer and an adhesive strength adjusting layer are not formed over the range from the main surface of the thermal adhesive resin layer to that of a hardly adhesive layer. CONSTITUTION:A laminating material 24 contains a base material 28 and an adhesive layer 30 is formed to one main surface of the base material 28 and a concealing layer 32 is formed to one main surface of the adhesive layer 30. An adhesive strength adjusting layer 36 is formed to the surface on the side of the release layer 34 of the concealing layer 32. A gap part 40 where a thermal adhesive resin layer 38 and the adhesive strength adjusting layer 36 are not formed is formed over the range from the main surface of the thermal adhesive resin layer 38 to that of the release layer 34. Since the adhesive strength adjusting layer 36 is formed between the laminating material 24 and the thermal adhesive resin layer 38, the laminating material 24 is easily peeled off from postcard pasteboard 22. A recipient peels off the laminating material from the postcard pasteboard 22 and can apply a seal and writing to the postcard pasteboard 22 by the gap part 40.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an adhesive material, which is applied to an object such as a postcard to hide the top part of the confidential information, so that an authorized receiver can The present invention relates to an adhesive material that can have a secret top portion as appropriate.

(Prior art) For example, an adhesive material that is attached to an object such as a postcard is used to hide the field for writing confidential information so that the authorized receiver can see the contents relatively easily. being developed.

FIG. 12 is a partial cross-sectional view showing an example of the use of a conventional adhesive material for postcards. This postcard 1 includes a postcard mount 2 formed to the size of an official postcard, and an adhesive material 3 pasted on a part of this postcard mount 2. This adhesive material 3 includes a base material 4. On the other hand, an adhesive layer 5 is formed on the main surface. A concealing layer 6 made of aluminum is formed on one main surface of the adhesive layer 5.

The base material 4 and the hiding layer 6 are bonded together by an adhesive layer 5. A release agent layer 7 is formed on one main surface of the hiding layer 6.

@A thermal adhesive resin layer 8 is formed on one main surface of the release agent layer 7. A postcard mount 2 is formed on one main surface of the thermoadhesive resin layer 8 . When the heat-adhesive resin layer 8 is heated, it melts and
An adhesive material 3 is pasted on the postcard mount 2.

However, although the conventional adhesive material 3 has various advantages, when the adhesive material 3 is removed, it comes off with a crunch and is difficult to remove.

FIG. 13 is a partial cross-sectional view showing an example of the use of an adhesive material that gradually peels off and is easy to peel off in a postcard, in order to solve these problems.

This postcard 1 includes a postcard mount 2 formed to the size of an official postcard and an adhesive material 3 stuck to a part of the postcard mount 2. A cutting cut 9 is formed in the adhesive material 3. This adhesive material 3 includes a base material 4, and an adhesive layer 5 is formed on one main surface of the base material 4. A concealing layer 6 made of aluminum is formed on one main surface of the adhesive layer 5. hidden layer 6
A release agent layer 10 is formed on a part of the surface. An adhesive force adjustment layer 11 is formed on the surface of the hiding layer 6 on the release agent layer 10 side. A thermoadhesive resin layer 8 is formed on the main surface of the adhesive force adjustment layer 11 . A postcard mount 2 is formed on one main surface of the thermoadhesive resin layer 8 . In the adhesive material 3, a heat-adhesive resin layer 8 is heated and melted, and is adhered to the postcard mount 2.

Then, at the tip of the adhesive material 3, a linear adhesive without a release agent layer 10 is formed so that the thermal adhesive resin layer 8 and the hiding layer 6 side of the base material 4 are directly adhered in a linear manner. Part 1
2 exists. In the part where the release agent layer 10 is formed, the base material 4 and the thermal adhesive resin layer 8 are weakly bonded, and in the linear adhesive part 12 where the release agent layer 10 is not formed,
The base material 4 and the thermoadhesive resin layer 8 are strongly adhered to each other. Therefore, it is sufficient to cut it off at the cutting cut 9. Then, on the surface of the postcard mount 2, an information section 13 is formed in which confidential information and the like are written.

The adhesive material 3 is attached to the postcard mount 2 on the surface of the thermoadhesive resin layer 8 . The information section 13 can be seen through the heat-adhesive resin layer 8 and the adhesive force adjustment layer 11.

(Problem to be Solved by the Invention) However, with the previously proposed adhesive material, after peeling it off from the object to which it is attached, it is possible to stamp it on the object to which it is attached, such as a postcard mount.
It was difficult to write. For this reason, the person who took the official Uke was unable to write information on the object to which it was attached.

Therefore, the main purpose of this invention is to allow the person who takes the regular receiver to peel off the adhesive relatively easily and see the information underneath, and that it does not peel off gradually when peeled off. To provide an adhesive material that is easy to peel off.

(Means for Solving the Problems) The present invention includes a base material, a release agent layer formed on at least a part of the surface of the base material, and an adhesive force adjustment layer formed on the main surface of the release agent layer. , a thermally adhesive resin layer formed on the main surface of the adhesive force adjustment layer, and a thermally adhesive resin layer formed from the main surface of the thermally adhesive resin layer to the main surface of the release agent layer, forming a thermally adhesive resin layer and an adhesive force adjustment layer. This is an adhesive material that includes voids that are not covered.

(Function) The thermoadhesive resin layer formed on the back side of the adhesive material is heated and pressurized on the surface of the object to which it is applied, thereby melting the thermoadhesive resin layer and attaching it to the object. It is pasted. Since an adhesive force adjustment layer is formed between the adhesive material and the heat-adhesive resin layer, when the adhesive material is peeled off from a single piece of postcard, it gradually peels off and is easy to peel off.

Further, a void portion in which no heat-adhesive resin layer is formed is formed from the main surface of the heat-adhesive resin layer to the main surface of the release agent layer. Therefore, after peeling off the adhesive material from the object, the authorized receiver can write information on the object by filling in the gap.

(Effects of the Invention) According to the present invention, when the adhesive material is attached to an object to be adhered to with a heat-adhesive resin layer, when the adhesive material is peeled off from the object to be adhered to,
Since the adhesive force adjustment layer is formed between the base material and the thermoadhesive resin layer, it is easy to peel off and peel off gradually.

Moreover, since a gap is formed from the main surface of the heat-adhesive resin layer to the main surface of the release agent layer, where the heat-adhesive resin layer and adhesive force adjustment layer are not formed, it is difficult for the person who takes the regular receiver to take it. After peeling off the adhesive material from the object, it is possible to stamp, write, etc. on the object through the gap, and information can be written on the object.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

(Example) This adhesive material can be applied to various objects, but in this example, a case where a postcard is used as the object will be described.

FIG. 1 is a perspective view showing an embodiment of the present invention in a postcard, and FIG. 2 is a partial sectional view taken along line nn in FIG. 1.

This postcard 20 includes a postcard mount 22 formed in the size of an official postcard and an adhesive material 24 stuck to a part of the postcard mount 22. This adhesive material 24 has a cutting cut 26.
is formed.

The adhesive material 24 to be pasted on the surface of the postcard mount 22, especially in the area where the line-forming part for confidential matters such as information on finance and insurance is formed, is mainly based on FIG. I will explain.

The adhesive material 24 includes a base material 28 made of a material that is relatively flexible and can be cut by hand or with scissors, such as paper 1 synthetic resin film.

An adhesive layer 30 is formed on one main surface of the base material 28 . As the adhesive forming this adhesive layer 30, for example, an emulsion such as a polyvinyl acetate emulsion,
These include latex adhesives, water-soluble adhesives such as water glass and casein, and solvent-based reactive adhesives such as polyurethane.

A concealing layer 32 is formed on one main surface of the adhesive layer 30. This hiding layer 32 is formed by laminating film materials having a hiding power, such as aluminum foil with a thickness of 7 μm, with the adhesive force of the adhesive layer 30.
It may be formed by printing to a thickness of 0 μm.

When the concealing layer 32 is formed of an ink having a concealing property, the adhesive layer 30 is not necessary.

A release agent layer 34 coated with a release agent such as polyethylene, silicone resin, fan resin, paraffin, wax, etc. is formed in the central portion of the surface of the concealing layer 32 . The thickness of the release agent layer 34 is, for example, 15 to 20 μm for polyethylene, and 0.5 to 1 μm for silicone resin.

On the surface of the hiding layer 32 on the release agent layer 34 side, an adhesive force adjustment layer 36 is formed with a thickness of, for example, 1 to 5 μm.

The main surface of the adhesive force adjustment layer 36 is coated with a thermoadhesive resin by extrusion while heating, or by dissolving it in a solvent or dispersing it in water and printing with gravure or silk screen. The resin layer 38 is formed to have a thickness of, for example, 10 to 30 μm.

This thermally adhesive resin layer 38 is heated at a temperature of, for example, 60°C to 20°C.
It is formed so that it softens and melts at a temperature of 0° C. and can be completely adhered to the postcard mount 22.

Further, from the main surface of the heat-adhesive resin layer 38 to the main surface of the release agent layer 34, the heat-adhesive resin layer 38 and the adhesive force adjustment layer 3
A gap 40 in which no. 6 is not formed is formed.

The cutting cuts 26 are formed slightly inside the left and right ends of the release agent layer 34 . Further, the cutting cut 26 is formed on the base material 28. Adhesive layer 30. Concealing layer 32, peeling side layer 34. It is formed on both the upper and lower ends of the adhesive force adjustment layer 36 and the thermal adhesive resin layer 38.

Then, at the tip of the adhesive material 24, a linear adhesive without a release agent layer 34 is formed so that the thermal adhesive resin layer 38 and the hiding layer 32 side of the base material 28 are directly adhered in a linear manner. section 42 is present. In the part where the release agent layer 34 is formed, the base material 28 and the thermally adhesive resin layer 38 are weakly bonded, and in the linear adhesive part 42 where the release agent layer 34 is not formed, the base material 28 and the thermal adhesive resin layer 38 are weakly bonded. It is strongly adhered to the adhesive resin layer 38. Therefore, it is sufficient to cut it off at the cutting cut 26.

Then, on the surface of the postcard mount 22, an information section 44 is formed in which confidential information and the like are written. In addition, the information department 44
In order to be able to see through the thermal adhesive resin layer 38 and the adhesive force adjustment layer 36, the thermal adhesive resin layer 38 and the adhesive force adjustment layer 36 need to be transparent or translucent.

In addition, this information part 44 can be used as a lottery part, and this postcard 20 can also be used as a postcard with a lottery.

The adhesive material 24 is attached to the postcard mount 22 on the surface of the thermoadhesive resin layer 38 .

FIG. 3 is a partial sectional view showing a state in which the postcard 20 is cut off at the cutting cut 26 and the adhesive material 24 is peeled off, and FIG. 4 is a perspective view thereof.

The information section 44 can be seen through the heat-adhesive resin layer 38 and the adhesive force adjustment layer 36.

In addition, after peeling off the adhesive material 24 from the postcard mount 22, the authorized receiver passes the postcard mount 22 through the gap 4o.
It is possible to stamp or write information on the postcard mount 22.

In addition to the above embodiments, examples of the base material 28 include synthetic paper, cellophane, polyethylene, polyester films, aluminum foil, etc. When this adhesive material 24 is pasted on the postcard mount 22, , a release agent layer 34
It is preferable to select a material that is relatively flexible so that the adhesive material 24 does not inadvertently peel off due to the adhesive force with the adhesive force adjustment layer 36 in the area where the adhesive is formed.

Furthermore, if a material with excellent hiding properties, such as aluminum foil, is selected as the base material 28, it is not necessary to form the hiding layer 32 as in the previous embodiment.

The material of the adhesive force adjustment layer 36 is selected in relation to the release agent layer 34. For example, when polyethylene is selected as the resin for forming the release agent layer 34, the adhesive force adjustment layer 36
For example, polyvinyl methyl ether,
Polyvinylethyl ether, polyvinyl isobutyl ether, carboxyl-modified acrylic resin, polyamide resin, chlorinated polypropylene, ethylene/acrylic acid copolymer, ethylene/vinyl acetate copolymer, ethylene/ethyl acrylate resin, styrene/butadiene/styrene block copolymer Polymer, styrene/isoprene/styrene block copolymer, polyester resin, terpene resin, rosin, ester rosin, hydrogenated rosin, polymerized rosin,
Butyral resin.

Petroleum resins, waxes such as polyethylene, 7x, paraffin wax, montan wax, microcrystalline wax, vinyl chloride/vinyl acetate copolymer, nitrocellulose, etc. can be selected. Then, the adhesion force adjusting layer 36 can be formed by coating these alone or a mixture of two or more types.

According to the inventor's experiments, in the above-mentioned embodiment, a mixed solution of chlorinated polypropylene and vinyl chloride/vinyl acetate copolymer was applied to the polyethylene layer, that is, the release agent layer 34, to form the adhesive force adjustment layer 36. However, when the blending ratio was 40 to 240 parts of chlorinated polypropylene to 100 parts of vinyl chloride/vinyl acetate copolymer, the best results were obtained when 120 parts of chlorinated polypropylene was blended. Ta.

In addition, in the above embodiment, a mixed solution of a styrene-butadiene-styrene block copolymer and a vinyl chloride-vinyl acetate copolymer is applied to the polyethylene layer, that is, the release agent layer 34, and the adhesive force adjustment layer 36 and the blending ratio of vinyl chloride/vinyl acetate copolymer 10
When the styrene/butadiene/styrene block copolymer was mixed in an amount of 1 to 40 parts relative to 0 parts, the best results were obtained when IO parts of the styrene/butadiene/styrene block copolymer were blended.

As an example of the thermoadhesive resin, an EVA adhesive is selected. Its composition consists of EVA (ethylene-vinyl acetate copolymer resin), a tackifying side, wax, and an antioxidant, and a plasticizer and filler may be added as supplements.

Examples of the tackifier include glycerin ester of partially hydrogenated rosin, glycerin ester of rosin, pentaerythritol modified rosin, petroleum resin, α-methylstyrene/vinyltoluene copolymer, terpene oil polymer, and terpene phenol polymer.

Waxes include paraffin wax, microcrystalline wax, low molecular weight polyethylene wax, and Fischer-Tropsch wax.

Examples include castor wax and chlorinated paraffin.

Examples of antioxidants include hindered phenol compounds, salicylic acid compounds, benzophenone compounds, penzotriazur compounds, phosphorus compounds, sulfur compounds, and organometallic compounds.

Thermal adhesive resins other than the above examples include styrene-butadiene-styrene copolymer resin, styrene-isoprene-styrene copolymer resin, polyethylene, ethylene-ethyl acrylate copolymer resin, ethylene-acrylic acid copolymer resin, ethylene- Methyl acrylate copolymer resin, ethylene-methyl methacrylate copolymer resin, ethylene-methacrylic acid copolymer resin, ionomer resin, polymethylpentene resin, ethylene-vinyl alcohol copolymer resin, vinylidene chloride resin, vinyl chloride vinyl acetate copolymer resin , polyamide resin, styrene-acrylic copolymer resin, polystyrene resin, polyacrylic acid copolymer resin, polyester resin, polyurethane resin.

You can choose wax etc. When printing or coating these, they may be used as appropriate while being heated, dissolved in a solvent, or dispersed in water.

The adhesive material 24 is adhered to the postcard mount 22 by melting the heat-adhesive resin layer 38 by heating. If the adhesive material 24 is heated only when it is confirmed that the adhesive material 24 is superimposed on the postcard mount 22 at the optimal position, the adhesive material 24 is accurately adhered to the optimal position on the surface of the postcard mount 22. Therefore, so-called pasting errors, such as not being pasted at the correct position, do not occur when pressure-sensitive adhesives are used.

Furthermore, since the adhesive material 24 is formed with a tear-off cut 26, even if the content of the genuine receiver is seen by a third party who is not the recipient, the cut-off cut 26 will be torn. The receiver will know that the contents have been viewed by the recipient.

According to the present invention, since the adhesive force adjustment layer 36 is formed between the adhesive material 24 and the heat-adhesive resin layer 38, the adhesive force adjustment layer 36
When it is peeled off from the postcard mount 22, it gradually peels off and is easy to peel off.

In addition, after peeling off the adhesive material 24 from the postcard mount 22, the authorized receiver can remove the adhesive 24 from the postcard mount 22 by using the gap 40.
It is possible to stamp or write information on the postcard mount 22.

In the embodiment described above, the release agent layer 34 is formed in the shape of a band at appropriate intervals in the width direction of the base material 28. For example, as shown in FIG. A spot-like portion where the release agent layer 34 is not formed may be provided in the vicinity.

In this way, a spot-like exposed portion of the adhesive force adjustment layer 36 will be formed near both edges of the base material 28, and when this adhesive material 24 is pasted on the postcard mount 22, In addition, it is possible to prevent the adhesive material 24 from being accidentally peeled off from the postcard mount 22 near the longitudinal edges of the base material 28.

6 is a cross-sectional view of a main part showing still another embodiment of the present invention, and FIG. 7 is a main part sectional view showing a state in which the adhesive material 24 is peeled off from the postcard mount 22 in the embodiment shown in FIG. FIG.

In this embodiment, the release agent layer 34 and the adhesive strength adjustment layer 36 are formed at the tip of the adhesive material 24 so that the thermal adhesive resin layer 38 and the hiding layer 32 are directly adhered to each other in a line shape. There is a line-shaped adhesive portion 42 that is not present. Even with such a configuration, the adhesive material 24 can be easily peeled off from the postcard mount 22 by cutting it off at the cutting cut 26.

FIG. 8 is a sectional view of a main part showing another embodiment of the present invention. In this embodiment, in particular, the substrate 28.adhesive layer 30.
Hidden layer 32. Release agent layer 34. Separation cuts 26a and separation cuts 2 are provided at both upper and lower ends of the adhesive force adjustment layer 36 and the thermal adhesive resin layer 38 along the edges of the release agent layer 34.
6b is formed, and further, a cut-off cut 26c is formed inside the cut-off cut 26a.

In the embodiment shown in FIG. 8, the base material 28 between the cutting cuts 26a and 16c can be separated, as shown in FIG. Note that this separation cut 26
A recess may be formed at the tip of the base material 28 between a and 16c to make it easier to catch a finger or nail.
Alternatively, it may be formed into five pieces to make it easier to pick with fingers.

FIG. 10 is a plan view of main parts showing still another embodiment of the present invention. In this embodiment, in particular, a number of cuts 34 are formed along the perimeter of the adhesive 24. Further, each cut 34 is composed of a linear cut portion 36a and an arc-shaped cut portion 36b so that a portion of adjacent cuts 34 overlap when viewed in the direction in which the adhesive material 24 is peeled off. . In this way, the central portion of the adhesive material 24 can be easily peeled off.

FIG. 11 is a plan view of essential parts showing a modification of the embodiment shown in FIG. 10. In this embodiment, in particular, linear cuts 34 are formed diagonally around the base material 28 so that adjacent cuts 34 partially overlap when viewed in the direction in which the adhesive material 24 is peeled off. Even in this case, the central portion of the adhesive material 24 can be easily peeled off. In the embodiment shown in FIG. 10, the adhesive material 24 is attached to a part of the postcard mount 22, but as in this embodiment, the adhesive material 24 is attached to the entire postcard mount 22. may be done.

In this embodiment, a case has been described in which a postcard is used as the object to be adhered, but the adhesive material 24 can be applied to various other objects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a postcard according to an embodiment of the present invention, and FIG. 2 is a partial sectional view taken along line 1--2 in FIG. FIG. 3 is a partial sectional view showing the adhesive material removed from the postcard mount, and FIG. 4 is a perspective view thereof. FIG. 5 is a perspective view showing another embodiment of the invention. FIG. 6 is a cross-sectional view of a main part showing still another embodiment of the present invention, and FIG. 7 is a cross-sectional view of a main part showing a state in which the adhesive material is peeled off from a postcard mount in the embodiment shown in FIG. It is a diagram. FIG. 8 is a cross-sectional view of the main part showing another embodiment of the present invention, and FIG. 9 is a cross-sectional view of the main part showing the state in which the adhesive material is peeled off from the postcard mount in the embodiment shown in FIG. It is. FIG. 10 is a plan view of main parts showing still another embodiment of the present invention. FIG. 11 is a plan view of essential parts showing a modification of the embodiment shown in FIG. 10. FIGS. 12 and 13 are partial cross-sectional views of a conventional postcard of this type. In the figure, 24 is an adhesive material, 28 is a base material, 34 is a release agent layer, 36 is an adhesive force adjustment layer, 38 is a thermoadhesive resin layer, 40
indicates a void. Patent applicant Omatsu Chemical Industry Co., Ltd. Agent Patent attorney Oka 1) Engraving of the Zenkei drawing (no changes in content) Fig. 1 translation ■] Fig. 2 υ Fig. 3 Fig. n No No Fig. 4 Fig. 5 44 4 Figure 8 fxS Figure Figure 10 Figure 11 Figure 12 Figure 13 1 Procedural amendment cap button February 14, 1991 1990 Patent Application No. 294810 2, Title of invention adhesive 3, Amendment Patent applicant address: 2-1 Kobashi-cho, Tennoji-ku, Osaka Name: Omatsu Chemical Industry Co., Ltd. Representative Director Noboru Matsuguchi 4, Agent: 8541 Yuki Osaka (06) 252-6
888 Address: 4-2-21 Minamihonmachi, Chuo-ku, Osaka Voluntary amendment 6, All drawings subject to amendment 7 Contents of amendment

Claims (1)

[Scope of Claims] A base material, a release agent layer formed on at least a part of the surface of the base material, an adhesive force adjustment layer formed on the main surface of the release agent layer, and a main layer of the adhesive force adjustment layer. A thermal adhesive resin layer formed on a surface, and a thermal adhesive resin layer formed from the main surface of the thermal adhesive resin layer to the main surface of the release agent layer, on which the thermal adhesive resin layer and the adhesive force adjustment layer are not formed. Adhesive material, including voids.