JP3215119B2 - Postcard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a postcard, and more particularly to a postcard capable of temporarily hiding a secret matter formed on the surface of a postcard mount.

[0002]

FIG. 13 is a perspective view showing a conventional postcard, and FIG. 14 is a sectional view taken along line XIV-XIV in FIG. The postcard 1 includes a postcard backing 2 formed in a government-made postcard size, and a covering material 3 attached to a part of the postcard backing 2. The covering material 3 includes a sheet-like base material 4.
A concealing layer 5 is formed on the main surface of the substrate 4. On the surface of the hiding layer 5, a laminate layer 6 made of polyethylene is formed. Further, on the surface of the laminate layer 6,
An adhesive layer 7 made of a pressure-sensitive adhesive is formed. The covering material 3 is adhered to a part of the postcard backing paper 2 by the adhesive layer 7.

[0003]

In such a conventional postcard, the surface of the postcard mount can be hidden, but there were cases where an error occurred in attaching the covering material to the postcard mount.

[0004] As a postcard for solving this problem, a postcard using a heat-adhesive resin as an adhesive has been developed. In such a postcard, the positions of the covering material and the postcard board are confirmed, and then the heat-adhesive resin layer is melted, and the covering material is attached to the postcard board. Therefore, when attaching the covering material to the postcard mount, an attachment error is less likely to occur.

[0005] However, when the covering material is adhered to the postcard board in such a postcard, the postcard board may be curled because the postcard board is also heated when the heat-adhesive resin layer is heated. .

[0006] Therefore, a main object of the present invention is to allow the surface of a postcard mount to be suitably and temporarily hidden without processing the surface of the postcard mount, and to use a heat-adhesive resin as an adhesive. Even if it is used, it is to provide a postcard in which the postcard mount does not easily curl when the covering material is applied.

[0007]

SUMMARY OF THE INVENTION The present invention is a postcard including a postcard mount and an adhesive stuck to at least a part of a surface of the postcard mount, wherein the adhesive is a sheet base material. , Formed on the main surface of the sheet substrate, curling the sheet substrate
An anti-curl layer for preventing the occurrence of heat, and a heat-adhesive resin layer formed on the back side of the sheet base material and made of a heat-adhesive resin having delayed tack properties, the adhesive material is located at a position away from the postcard backing paper. After being heated and activated to activate the delayed tack heat-adhesive resin layer, the post-adhesive is adhered to the surface of the postcard backing paper by the heat-adhesive resin layer.

[0008]

Since the heat-adhesive resin layer is formed by the delayed-adhesive heat-adhesive resin layer, it can be adhered to the postcard after the coating material is heated.

[0009]

According to the present invention, the surface of the postcard mount can be suitably and temporarily hidden without processing the surface of the postcard mount. Further, even when a heat-adhesive resin is used as an adhesive in a postcard, the postcard mount is unlikely to curl when the covering material is attached.

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.

[0011]

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

The postcard 10 includes a postcard backing 12 formed in the size of an official postcard, and a covering material 14 attached to a part of the postcard backing 12.

Next, a covering material 14 to be adhered to the surface of the postcard backing 12, particularly to a portion where confidential matters are described, for example, a guide for finance or insurance, will be described mainly with reference to FIG. I do.

The covering material 14 includes a sheet-like base material 16 which has been dimensionally stabilized by a dimension stabilizer. The base material 16 is formed of a relatively flexible material, such as paper or a synthetic resin film, which can be cut with scissors or the like.

Examples of dimensional stabilizers include butadiene-
Latexes such as styrene latex, butadiene-acrylonitrile latex, butadiene-methyl methacrylate latex, chloroprene latex, vinylidene chloride latex, acrylate latex, and water-soluble thermosetting resins such as urea resin, melamine resin, phenol resin, and PVA (polyvinyl alcohol); Solvent-based resins such as polyester resin, vinyl chloride resin, shellac resin and the like.

These materials may be coated or impregnated singly or as a mixture of two or more kinds or together with a cross-linking agent.
Stabilize the dimensions of 6. Examples of the crosslinking agent include epoxy resin, glyoxal, aminoaldehyde resin, zirconium carbonate, and the like.

On one main surface of the substrate 16, an anti-curl agent is coated to form an anti-curl layer 18.

On the other main surface of the base material 16, a hiding layer 20 is formed. The hiding layer 20 is formed by performing solid silver printing with silver ink, for example.
Alternatively, it is formed by laminating a film material having a hiding power such as aluminum foil with an adhesive or the like.

A laminating layer 22 is formed on the surface of the concealing layer 20 by laminating, for example, polyethylene or polypropylene by a T-die method.

Further, the surface of the laminate layer 22 is coated with a heat-adhesive resin having a delayed tack property by extrusion coating while heating, or is dissolved in a solvent or dispersed in water to be printed by gravure or silk screen. Thereby, the heat-adhesive resin layer 24 is formed.

The heat-adhesive resin layer 24 is made of, for example, 10
It is melted at a temperature of 0 ° C. to 200 ° C., and is formed so that it can be adhered to a postcard mount 12 made of paper, for example.

The heat-adhesive resin has a delayed tack property, and basically comprises a polymer and a solid plasticizer,
It preferably contains a tackifier and may further include an antioxidant and other additives.

Examples of the polymer include polyvinyl acetate, polybutyl methacrylate, vinyl chloride-vinylidene chloride copolymer, synthetic rubber, vinyl acetate-2-ethylhexyl copolymer, vinyl acetate-ethylene copolymer, vinyl pyrrolidone-styrene copolymer. , Styrene-butadiene copolymer, vinyl pyrrolidone-ethyl acrylate copolymer, and the like.

The solid plasticizer includes a crystallized plasticizer and an amorphous plasticizer. The crystallized solid plasticizer has no tackiness. On the other hand, an amorphous solid plasticizer has tackiness.

Examples of such a solid plasticizer include dicyclohexyl ortho-phthalate, diphenyl ortho-phthalate, dihexyl ortho-phthalate, dihydroabiethyl ortho-phthalate, dimethyl isophthalate, sterulose benzoate, ethylene glycol dibenzoate, Trimethylolethane tribenzoate, glyceride tribenzoate, pentaerythritol tetrabenzoate, sterulose octaacetate, tricyclohexyl citrate, N-cyclohexyl-p-toluenesulfonamide, dehydroabiethylamine carbonate, methoxyethyl stearate-urea Complexes.

Examples of the tackifier include indene resin, ethyl cellulose, petroleum resin (hydrocarbon resin), terpene resin, rosin derivative (polymerized rosin, hydrogenated rosin, pentaerythritol ester of rosin, resin acid dimer) and the like.

FIG. 3 shows a laminate layer 22 formed by the T-die method.
FIG. 4 is an illustrative view showing a method for forming a substrate; Laminate layer material 2
2a is thinned by the T-die 25, and the laminate layer 22 is formed. If the melting temperature at this time is increased,
The viscosity of the laminate layer 22 decreases, and the tackiness increases. Further, when the melting temperature is lowered, the viscosity of the laminate layer 22 increases, and the adhesiveness decreases. In this way, by controlling the melting temperature in the T-die method,
The adhesiveness between the laminate layer 22 and the hiding layer 20 is controlled.

The anti-curl layer 18 is formed to prevent curling. That is, since the hiding layer 20, the laminate layer 22, and the heat-adhesive resin layer 24 are formed,
For example, when paper is used as the substrate 16, expansion and contraction of the surface of the substrate 16 on the side of the concealing layer 20 is prevented. Therefore, if the paper constituting the base material 16 absorbs and releases moisture from the surface of the base material 16 on the side opposite to the concealing layer 20 side, the paper expands and contracts and curls. Therefore, the paper constituting the base material 16 is formed so as to prevent curling by eliminating or making the change in the moisture content of the paper. As the anti-curling agent, an acrylic emulsion, a vinylidene chloride resin, a polyethylene emulsion, a wax such as a paraffin wax or a microcrystalline wax, a metallic soap, or the like is used in an emulsion form or by heat melting. These alone or
The anti-curl layer 18 is formed by mixing and coating or impregnating two or more kinds. Also, the anti-curl layer 18 may be formed by laminating polyethylene on the surface of the base material 16 opposite to the concealing layer 20 side, similarly to the laminate layer 22.

Further, when a non-stretchable material such as a resin film is used as the base material 16, curling may occur on the base material 16 side of the base material 16 due to shrinkage of the concealing layer 20 and the heat-adhesive resin layer 24. appear. Therefore, as the anti-curl agent, a water-soluble polymer such as polyvinyl alcohol, polyethylene oxide and polyvinyl methyl ether, a natural polymer such as starch and casein, a latex and an aminoaldehyde resin are used. By coating these, an anti-curl layer 18 is formed, and the anti-curl layer 1 is formed.
The function of 8 cancels out and prevents curl.

As shown in FIG. 4 and FIG.
Are the substrate 16, the anti-curl layer 18, and the hiding layer 20.
Can be cut off from the postcard backing sheet 12 relatively easily. Then, the surface of the postcard mount 12 can be seen.

In the postcard of the present invention, the heat-adhesive resin layer 2
4 is formed by a delayed tack adhesive and has adhesive properties as a pressure-sensitive adhesive. The delayed tack adhesive is a kind of hot melt adhesive and has a long open time. Therefore, after heating the coating material 14,
It can be attached to the postcard mount 12.

FIG. 6 shows a postcard mount 1 of such a covering material 14.
FIG. 5 is an illustrative view showing one example of a method of sticking to No. 2; First, the covering material 14 is held on the holding reel 26. Coating material 14
Is sent to the dryer 28 at one end. Then, the coating material 14 is heated in the dryer 28. Thereafter, the coating material 14 is cut at the location indicated by the arrow A, and is further sucked into the vacuum device 30. Further, between the vacuum device 30 and the pressing roller 32, the covering material 14 is adhered to the postcard mount 12.

As described above, since the covering material 14 is adhered to the postcard mount 12 after being heated, the postcard mount 12
Is not heated, and the postcard mount 12 is hard to curl.

Further, the surface of the substrate 16 tends to release heat at the surface, and the surface tends to shrink. However, since the base material 16 of this embodiment is dimensionally stabilized by the dimension stabilizer, when the covering material 14 is manufactured and attached,
Its surface does not easily shrink. Further, the anti-curl agent is coated on one main surface of the base material 16 to form the anti-curl layer 20, so that the coating material 14 is unlikely to curl during its production and attachment.

7 and 8 show another embodiment of the present invention. FIG. 7 is a perspective view, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG. In this embodiment, in particular, the covering material 14 extends from one end of the postcard backing sheet 12 and is integrally formed, and is folded back and adhered to the postcard backing sheet 12.

Also in this embodiment, as shown in FIG. 9 and FIG.
And the concealing layer 20 can be cut and peeled off the postcard backing 12 relatively easily. Then, the surface of the postcard mount 12 can be seen.

When covering a confidential matter such as a bank account balance formed on a part of the surface of a postcard, a cut is made so that the base material 16, the anti-curl layer 20 and the concealing layer 22 can be cut off. The base material 16, the anti-curl layer 20 and the concealing layer 22 may be formed appropriately so that the base material 16, the anti-curl layer 20 and the concealing layer 22 can be separated from the postcard backing paper 12 at the cut. For example, if the cut is formed along the periphery of the base material, only the central portion of the covering material can be peeled off.
In this case, as shown in FIG. 11, a part of adjacent cuts 34 viewed in the direction in which the coating material 14 is peeled off overlaps,
If one cut 34 is composed of a linear cut 36a and an arc cut 36b, the central portion of the covering material 14 can be easily peeled off. In order to easily peel off the central portion of the coating material, for example, as shown in FIG.
Each of the linear cuts 34 may be formed diagonally around the base 16 so that the cuts 34 adjacent to each other when viewed in the direction in which the sheet is peeled off overlap.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view illustrating a method of forming a laminate layer by a T-die method.

FIG. 4 is a perspective view showing a state in which the covering material is peeled off from the postcard mount.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is an illustrative view showing one example of a method of attaching a covering material to a postcard mount;

FIG. 7 is a perspective view showing another embodiment of the present invention.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7;

FIG. 9 is a perspective view showing a state where the covering material of the postcard shown in FIGS. 7 and 8 is removed.

FIG. 10 is a sectional view taken along line XX in FIG. 9;

FIG. 11 is a main part surface view showing still another embodiment of the present invention.

FIG. 12 is a main part surface view showing a modification of the embodiment shown in FIG. 7;

FIG. 13 is a perspective view showing a conventional postcard.

14 is a sectional view taken along line XIV-XIV in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Postcard 12 Postcard mount 14 Coating material 16 Substrate 20 Hiding layer 24 Thermal adhesive resin layer

Claims (1)

(57) [Claims] 1. A postcard comprising a postcard mount and a sticking material stuck to at least a part of a surface of the postcard mount, wherein the sticking material is a sheet base material and the sheet base material Formed on the main surface of
And anti-curl layer to prevent, formed on the back side of the sheet substrate, and a heat-adhesive resin layer consisting of delayed tack of the thermal adhesive resin, the adhesive material is separated from the postcard base sheet A postcard, which is heated at a position to activate the delayed tacky thermoadhesive resin layer and then adhered to the surface of the postcard mount by the thermoadhesive resin layer.