JP2877443B2 - Postcard - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a postcard, and particularly relates to a postcard, for example, concealing a secret part during mailing and viewing the confidential part appropriately after receiving it by an authorized recipient. be able to,
About postcards.

(Prior art) In recent years, the number of mails containing confidential items, such as notices of bank balances, has increased. However, the confidential items are hidden during mailing, and after the legitimate recipient receives them. ,
Postcards have been developed that are formed so that their contents can be viewed relatively easily.

FIG. 10 is a partial sectional view of a conventional postcard of this type.
This postcard 1 is a postcard mount 2 formed into a large postcard.
And a covering material 3 attached to a part of the postcard mount 2. This covering material 3 includes a base material 4. An adhesive layer 5 is formed on one main surface of the substrate 4. On one main surface of the adhesive layer 5, a hiding layer 6 made of aluminum is formed. The base material 4 and the hiding layer 6 are adhered by the adhesive layer 5. On one main surface of the concealing layer 6, a release agent layer 7 is formed. On one main surface of the release agent layer 7, a heat-adhesive resin layer 8 is formed. The postcard backing paper 2 is formed on one main surface of the heat-adhesive resin layer 8. The heat-adhesive resin layer 8 is melted when heated, and the covering material 3 is adhered to the postcard mount 2.

(Problems to be Solved by the Invention) However, in the conventional postcard, even if the covering material is heated and pressurized and is adhered to the postcard mount, it is difficult to adhere with a moderate and stable adhesive force. Was.

That is, if the adhesive strength is too strong, the postcard may be damaged when the covering material is peeled off from the postcard. Further, if the adhesive strength is too weak, there is a risk that a part of the coating material during the mailing of the postcard may be peeled off.

In addition, since this postcard has nothing to catch a finger or a nail on the covering material, it is difficult to peel it off.

Therefore, the main object of the present invention is to peel off the covering material relatively easily after receiving it at a legitimate recipient, to see the contents of the information underneath, and to remove the covering material from the postcard mount. In this case, the postcard has a moderately stable coating that is not damaged, and does not peel off during the postal mailing. It is to provide.

(Means for Solving the Problems) The present invention relates to a postcard mount, affixed to the postcard mount,
A coating material covering at least a part thereof, the coating material is formed with a poorly-adhesive layer on at least a part of the surface of the base material, and an adhesive force adjusting layer is formed on a main surface of the hardly-adhesive layer; A heat-adhesive resin layer is formed on the main surface of the adhesive force adjusting layer such that a part thereof is in contact with the hard-adhesive layer, the hard-adhesive layer is strongly bonded to the heat-adhesive resin layer, and the adhesive force adjusting layer is The adhesive is weakly adhered to the hard-adhesive layer, the coating material is melted on the heat-adhesive resin layer, and is adhered to the postcard. This is a postcard in which the heat-adhesive resin layer is adhered to the postcard board when the coating material is formed and peeled off from the postcard board.

(Function) The heat-adhesive resin layer formed on the back surface of the coating material is heated and pressed on the front surface of the postcard mount to melt the heat-adhesive resin layer and adhere to the postcard mount. You. An adhesive strength adjusting layer is formed between the hardly-adhesive layer and the heat-adhesive resin layer. The hard-to-bond layer is strongly bonded to the heat-adhesive resin layer. Further, the adhesive strength adjusting layer is weakly adhered to the hardly-adhesive layer. Therefore, the hardly-adhesive layer and the heat-adhesive resin layer are strongly adhered, and the hardly-adhesive layer and the adhesive force adjusting layer are adhered with a moderately controlled weak adhesive force. Therefore, the covering material is attached to the postcard mount with a moderate and stable adhesive force.

Therefore, a part of the covering material can be prevented from peeling off during the mailing of the postcard, and the recipient remains on the postcard mount in a state where the heat-adhesive resin layer is adhered to the postcard mount after receiving. Since the base material is formed so as to be cut off by the cut, the coating material can be easily peeled off.

The base material at the portion where the adhesive strength adjusting layer is formed is relatively easily torn and separated by a cut formed from one end to the other end.

(Effect of the Invention) According to the present invention, when a thermo-adhesive resin is used to attach a coating material to a postcard mount, an adhesive force adjusting layer is formed between the coating material and the thermo-adhesive resin layer. Therefore, the covering material is attached to the postcard mount with a moderate and stable adhesive force.

Therefore, when the covering material is peeled from the postcard board, the postcard board is not damaged, and a part of the covering material does not peel off during the mailing of the postcard.

And, since the legitimate recipient has the heat-adhesive resin layer adhered to the postcard mount and remains on the postcard mount and the base material is formed so as to be cut off by a cut,
The notch formed in the base material of the covering material allows the covering material to be easily torn, and the covering material can be peeled off from the postcard mount.

The above and 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.

(Embodiment) 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 II-II in FIG.

The postcard 10 includes a postcard mount 12 formed into an official postcard size and a covering material 14 adhered to a part of the postcard mount 12. The coating material 14 has a cut 16 for cutting.

With reference to FIG. 2, a covering material 14 to be adhered to the surface of the postcard mount 12, particularly to a portion where an image forming part such as a secret matter such as a financial or insurance guide is formed. explain.

The covering material 14 includes a base material 18 formed of a relatively flexible material such as paper or a synthetic resin film, which can be cut by hand or scissors.

On one main surface of the base material 18, an adhesive layer 20 is formed. Examples of the adhesive forming the adhesive layer 20 include an emulsion such as a polyvinyl acetate emulsion, a latex adhesive, a water-soluble adhesive such as water glass and casein, and a solvent-based reactive adhesive such as polyurethane. is there.

On one main surface of the adhesive layer 20, a hiding layer 22 is formed. The concealing layer 22 is formed by laminating a film material having a concealing force such as aluminum foil with the adhesive force of the adhesive layer 20, but may be formed by printing with a concealing ink, for example.

On the surface of the concealing layer 22, a hard-to-bond layer 24 is made of polyethylene,
It is formed by extruding an inert resin having no polar group such as polypropylene and laminating.

Note that if the hard-to-bond layer 24 is concealed by blending a opaque filler such as carbon black or aluminum powder, the concealment layer 22 need not be formed.

An adhesive strength adjusting layer 26 is formed on one main surface of the hard adhesive layer 24.

The hard-adhesive layer 24
The hot-adhesive resin to be adhered to the polyolefin resin is coated by extrusion while heating, or is dissolved in a solvent or dispersed in water and printed by gravure or silk screen, etc.
Is formed.

This heat-adhesive resin layer 28 is, for example, 60 ° C. to 200 ° C.
It is formed so that it can be softened and melted at the temperature of, and can be completely adhered to the postcard mount 12.

The separating cuts 16 are formed slightly inside the left and right ends of the adhesive strength adjusting layer 26. In addition, the cut 16 for separating
18, adhesive layer 20, concealment layer 22, hard-to-bond layer 24, adhesive strength adjustment layer 26
And at both upper and lower ends of the heat-adhesive resin layer 28.

At the tip of the covering material 14, there is a line-shaped adhesive portion 30 where the adhesive force adjusting layer 26 is not formed so that the hardly-adhesive layer 24 and the heat-adhesive resin layer 28 are directly adhered in a line. I do. In the line-shaped bonding portion 30 where the bonding strength adjusting layer 26 is not formed, the heat bonding resin layer 28 of the hard bonding layer 24 is strongly bonded. Further, the hardly-adhesive layer 24 and the adhesive force adjusting layer 26 are adhered with a moderately controlled weak adhesive force. Therefore, the coating material 14 can be easily peeled off from the postcard backing paper 12 by being cut off by the cutout 16.

Then, on the surface of the postcard mount 12, an information section 32 in which a secret matter or the like is described is formed. In order to allow the information section 32 to be seen through the thermo-adhesive resin layer 28, the thermo-adhesive resin layer 28 needs to be transparent or translucent.

On the surface of the heat-adhesive resin layer 28, the covering material 14 is adhered to the postcard mount 12.

FIG. 3 shows a state in which the postcard 10 is cut off at a cutout 16 and the covering material 14 is peeled off. The information section 32 can be seen through the thermo-adhesive resin layer 28.

Examples of the substrate 18 include a synthetic paper, a cellophane, a film of polyethylene, polyester or the like or an aluminum foil in addition to the above-described embodiment. When the covering material 14 is adhered to the postcard mount 12, It is preferable to select a relatively flexible material so that the coating material 14 is not inadvertently delaminated against the adhesive force between the hard-adhesion layer 24 and the heat-adhesive resin layer 28.

When a material having excellent concealing properties such as aluminum foil is selected as the base material 18, the concealing layer 22 may not be formed as in the above-described embodiment.

The material of the adhesive strength adjusting layer 26 is selected in relation to the hard adhesive layer 24. For example, as a resin for forming the hard-adhesion layer 24,
When polyethylene is selected, examples of the material of the adhesive strength adjusting layer 26 include polyvinyl methyl ether, polyvinyl ethyl 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, styrene / isoprene / styrene block copolymer, polyester resin , Terpene resin,
Rosin, ester rosin, hydrogenated rosin, polymerized rosin, butyral resin, petroleum resin, polyethylene wax,
Waxes such as paraffin wax, montan wax and microcrystalline wax, vinyl chloride / vinyl acetate copolymer, nitrocellulose and the like can be selected.
The adhesive force adjusting layer 26 can be formed by coating a single material or a mixture of two or more thereof.

According to the experiment of the inventor, in the above-described embodiment, a mixed solution of chlorinated polypropylene and vinyl chloride / vinyl acetate copolymer was applied to the polyolefin resin layer, that is, the hardly-adhesive layer 24, and the adhesive force adjusting layer 26 was formed. When the chlorinated polypropylene is 40 to 240 parts with respect to 100 parts of the vinyl chloride / vinyl acetate copolymer, the best results are obtained when 120 parts of the chlorinated polypropylene are blended. Was done.

In the above-described embodiment, a mixed solution of a block copolymer of styrene, butadiene, and styrene and a copolymer of vinyl chloride and vinyl acetate was applied to the polyolefin resin layer, that is, the hardly-adhesive layer 24 to adjust the adhesive strength. When the layer 26 is formed and the mixing ratio thereof is from 1 part to 40 parts of the styrene / butadiene / styrene block copolymer to 100 parts of the vinyl chloride / vinyl acetate copolymer, the styrene / butadiene / styrene The best results were obtained when 10 parts of the block copolymer were blended.

As an example of the heat-adhesive resin, an EVA-based adhesive is selected. Its composition is composed of EVA (ethylene-vinyl acetate copolymer resin), tackifier, wax and antioxidant, and a plasticizer and a filler may be added in some cases.

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

Waxes include paraffin wax, microcrystalline wax, low molecular weight polyethylene wax,
Fischer-Tropsch wax, Custer wax,
Chlorinated paraffin and the like.

Antioxidants include hindered phenolic compounds,
There are salicylic acid compounds, benzophenone compounds, benzotriazole compounds, phosphorus compounds, sulfur compounds, organometallic compounds, and the like.

As the heat-adhesive resin other than the above examples, styrene-
Butadiene-styrene copolymer resin, styrene-isobrene-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-acryl copolymer resin, polystyrene resin, polyacrylic acid Copolymer resins, polyester resins, polyurethane resins, waxes and the like can be selected.
When printing or coating them, they may be used as appropriate while heating, or dissolved in a solvent, or dispersed in water.

The coating material 14 is adhered to the postcard backing paper 12 by melting the heat adhesive resin layer 28 by heating. Postcard mount
When heating is performed for the first time when it is confirmed that the covering material 14 has been superimposed on the optimal position of the 12, the covering material 14
It is precisely glued to the optimal position on the surface of the device. Therefore,
There is no so-called sticking error that the sticking cannot be performed at an accurate position as in the case of using a pressure-sensitive adhesive.

Also, since the cutout 16 is formed on the covering material 14, even if the contents are seen by a third party who is not a legitimate recipient, the cutout 16 is torn at that time, The legitimate recipient knows that the content has been seen.

According to the present invention, the adhesive force adjusting layer 26 is formed between the covering material 14 and the thermo-adhesive resin layer 28, and the covering material 14 and the thermo-adhesive resin layer 28 are strongly adhered to each other and adhere to the covering material 14. Since the force adjusting layer 26 is bonded with a moderately controlled weak adhesive force, the covering material 14 has a moderate and stable adhesive force, and
Affixed to 12.

Therefore, the adhesive strength is too strong, and when peeling off the covering material 14 from the postcard backing paper 12, the postcard backing paper 12 may be damaged or the adhesive strength may be too weak, and a part of the covering material 14 may be lost during the transportation of the postcard. It does not come off.

FIG. 4 is a cross-sectional view of a main part showing another embodiment of the present invention. FIG. 5 is a cross-sectional view of a main part showing a state where the covering material 14 is peeled off from the postcard backing sheet 12 in the embodiment shown in FIG. FIG.

In this embodiment, the hard-adhesion layer 24 and the adhesion-adjusting layer 26 are not formed so that the heat-adhesive resin layer 28 and the concealing layer 22 are directly adhered in a line at the tip of the covering material 14. There is a linear bonding portion 30. In the linear adhesive portion 30 where the hard adhesive layer 24 and the adhesive force adjusting layer 26 are not formed,
The heat-adhesive resin layer 28 and the hiding layer 22 are strongly bonded. Further, the hardly-adhesive layer 24 and the adhesive force adjusting layer 26 are adhered with a moderately controlled weak adhesive force. Even with such a configuration, the coating material 14 can be easily peeled off from the postcard backing paper 12 by being separated at the separation cut 16.

FIG. 6 is a sectional view of a principal part showing still another embodiment of the present invention. In this embodiment, in particular, the base material 18, the adhesive layer 2
0, separating cuts 16a and separating cuts 16b are formed at the upper and lower ends of the concealing layer 22, the difficult-to-adhere layer 24, the adhesive strength adjusting layer 26, and the heat-adhesive resin layer 28 along the edges of the adhesive strength adjusting layer 26. Then, a separation cut 16c is formed inside the separation cut 16a.

In the embodiment shown in FIG. 6, the separating cuts 16a and 1
The base material 18 between 6c can be cut off as shown in FIG. Note that the cuts 16a and 1
A recess may be formed at the tip of the base material 18 between 6c to make it easy for a finger or a nail to be hooked, or a convex piece may be formed to make it easy to pick with a finger.

FIG. 8 is a main part plan view showing another embodiment of the present invention. In this embodiment, in particular, a number of cuts 34
Is formed along the periphery of. In addition, each cut 34
Is composed of a straight cut portion 36a and an arc-shaped cut portion 36b such that adjacent cuts 34 overlap in the direction in which the covering material 14 is peeled off. By doing so, the central portion of the covering material 14 is easily peeled off.

FIG. 9 is a plan view of an essential part showing a modification of the embodiment shown in FIG. In this embodiment, in particular, so that part of the adjacent cuts 34 viewed in the direction of peeling the coating material 14 overlap,
Each linear cut 34 is formed obliquely around the base material 18.
Even in this case, the central portion of the covering material 14 can be easily peeled off. In the embodiment shown in FIG.
Although the covering material 14 is adhered to a part of the 12, the covering material 14 may be adhered to the entire postcard mount 12 as in this embodiment.

[Brief description of the drawings]

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 II-II in FIG. FIG. 3 is a partial cross-sectional view showing a state in which the covering material has been peeled off from the postcard mount. FIG. 4 is a cross-sectional view of a main part showing another embodiment of the present invention, and FIG. 5 is a cross-sectional view of a main part showing a state in which the covering material is peeled off from the postcard sheet in the embodiment shown in FIG. is there. 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 covering material is peeled off from the postcard sheet in the embodiment shown in FIG. It is. FIG. 8 is a main part plan view showing another embodiment of the present invention. FIG. 9 is a plan view of an essential part showing a modification of the embodiment shown in FIG. FIG. 10 is a partial cross-sectional view of a conventional postcard of this type. In the figure, 10 is a postcard, 12 is a postcard mount, 14 is a covering material, 16 is a cutting cut, 18 is a base material, 24 is a poor adhesive layer, 26
Denotes an adhesive force adjusting layer, and 28 denotes a thermoadhesive resin layer.

Claims (1)

(57) [Claims] 1. A postcard mount, and a coating material attached to the postcard mount and covering at least a part thereof, wherein the coating material has a hard-adhesion layer formed on at least a part of the surface of a substrate. An adhesive strength adjustment layer is formed on the main surface of the hard adhesive layer, and a thermoadhesive resin layer is formed on the main surface of the adhesive strength adjustment layer so that a part thereof is in contact with the hard adhesive layer, The hard-adhesion layer is strongly bonded to the heat-adhesive resin layer, the adhesion-adjusting layer is weakly bonded to the hard-adhesion layer, and the coating material is attached to the postcard mount by melting the heat-adhesive resin layer, The part of the base material on which the hardly-adhesive layer is formed has a cut formed from one end to the other end thereof, and the heat-adhesive resin layer is attached to the postcard when the covering material is peeled off from the postcard. The base material remains on the backing paper and the base material is cut A postcard formed to be detachable.