JP2875347B2 - 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 been increasing. ,
Postcards have been developed that are formed so that their contents can be viewed relatively easily.

FIG. 11 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 coating material 3 is adhered to the postcard backing paper 2 by heating and melting the heat-adhesive resin layer 8.

(Problems to be Solved by the Invention) However, conventional postcards have various advantages, but when peeling off the covering material, they are peeled off and difficult to peel off.

Therefore, the main object of the present invention is to make it possible 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 gradually remove the covering material. To provide a postcard that is easily peeled off.

(Means for Solving the Problems) The present invention includes a postcard mount, and a covering material attached to the postcard mount and covering at least a part thereof,
In the coating material, a release agent layer is formed on at least a part of the surface of the base material, an adhesive force adjustment layer is formed on a main surface of the release agent layer, and the adhesive material is thermally bonded to the main surface of the adhesive force adjustment layer. An adhesive resin layer is formed, the coating material is melted on the thermo-adhesive resin layer, and is adhered to the postcard mount, and the adhesive force adjusting layer is weakly adhered to the release agent layer and the thermo-adhesive resin layer Means that the adhesive is stronger than the adhesive strength with the release agent layer, and the release agent layer and the adhesive strength adjustment layer gradually swell when the coating material attached to the postcard is peeled off from the postcard. This is a postcard formed with a composition that can be peeled off.

(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. Since the adhesive force adjusting layer is formed between the base material and the heat-adhesive resin layer, when the coating material is peeled off from the single piece of the postcard, it is easily peeled off gradually.

(Effects of the Invention) According to the present invention, when a thermo-adhesive resin is used to attach a coating material to a postcard backing sheet, when the coating material is peeled off from a postcard single piece, an adhesive force adjusting layer is formed on a substrate. And the heat-adhesive resin layer, it is easy to peel off slowly.

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 emuljun, a latex adhesive such as polyvinyl acetate emuljun, a water-soluble adhesive such as water glass and casein, and a solvent-based reactive adhesive such as polyurethane. There is.

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 a part of the surface of the concealing layer 22, a release agent layer 24 formed by coating a release agent such as, for example, polyethylene, silicone resin, fluorine resin, paraffin, or wax is formed.

An adhesive strength adjusting layer 26 is formed on the surface of the concealing layer 22 on the side of the release agent layer 24.

On the main surface of the adhesive force adjusting layer 26, for example, a heat-adhesive resin is extruded and coated while heating, or is dissolved in a solvent or dispersed in water and printed by gravure or silk screen to perform heat bonding. The conductive resin layer 28 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 release agent layer 24. In addition, the cut 16 for separation is made of a base material 18,
The adhesive layer 20, the concealing layer 22, the release agent layer 24, the adhesive strength adjusting layer 26, and the heat adhesive resin layer 28 are formed on both upper and lower ends.

Then, at the tip of the covering material 14, a line-shaped bonding portion where the release agent layer 24 is not formed so that the heat-adhesive resin layer 28 and the concealing layer 22 side of the substrate 18 are directly bonded in a line. 30
Exists. In the portion where the release agent layer 24 is formed, the base material 18
And the heat-adhesive resin layer 28 are weakly adhered to each other.
In the linear bonding portion 30 where no 24 is formed, the base material 18 and the thermo-adhesive resin layer 28 are strongly bonded. Therefore, it is sufficient to cut off at the cutout 16 for separation.

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 that the information section 32 can be seen through the thermoadhesive resin layer 28 and the adhesive strength adjusting layer 26, the thermoadhesive resin layer 28 and the adhesive strength adjusting layer 26 need to be transparent or translucent. There is.

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 has been cut off at the cutout 16 and the covering material 14 has been peeled off. The information section 32 can be seen through the thermo-adhesive resin layer 28 and the adhesive strength adjusting layer 26.

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 of the portion where the release agent layer 24 is formed with the adhesive force adjusting layer 26.

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 force adjusting layer 26 is selected in relation to the release agent layer 24. For example, when polyethylene is selected as the resin forming the release agent layer 24, as the material of the adhesive strength adjusting layer 26, for example, 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, sterene / 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 polyethylene layer, that is, the release agent layer 24, to form the adhesion adjusting layer 26. And their mixing ratio,
When the amount of chlorinated polypropylene was 40 to 240 parts based on 100 parts of the vinyl chloride / vinyl acetate copolymer, the best result was obtained when 120 parts of chlorinated polypropylene was blended.

Further, in the above-described embodiment, a mixed solution of a block copolymer of styrene / butadiene / styrene and a vinyl chloride / vinyl acetate copolymer was applied to the polyethylene layer When the mixing ratio thereof is 1 part to 40 parts of a block copolymer of styrene / butadiene / styrene with respect to 100 parts of a vinyl chloride / vinyl acetate copolymer, styrene / butadiene /
The best results were obtained when 10 parts of a styrene block copolymer were blended.

In any case, the adhesive strength adjusting layer 26 is weakly adhered to the release agent layer 24 and strongly adhered to the heat-adhesive resin layer 28 as compared with the adhesive strength to the release agent layer 26, and the postcard backing paper
It is necessary that the coating material 14 attached to 12 be formed with a composition such that the release agent layer 24 and the adhesive force adjusting layer 26 are gradually peeled off when peeled off from the postcard backing paper 12. is there.

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), a tackifier, a wax, and an 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 pentaerythritol rosin, petroleum resin, α-methylstyrene / vinyltoluene copolymer, terpene oil polymer, terpene 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.

As antioxidants, hindered phenol 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. 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 postcard mount 12, the covering material 14 is accurately bonded to the optimal position on the surface of the postcard mount 12. Therefore, there is no so-called sticking error that the sticking cannot be performed at an accurate position unlike the case where the pressure-sensitive adhesive is used.

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, since the adhesive force adjusting layer 26 is formed between the base material 18 and the heat-adhesive resin layer 28, when the covering material 14 is peeled off from the postcard backing paper 12, it is easily peeled off.

In the above-described embodiment, the release agent layer 24 is formed in a band shape at appropriate intervals in the width direction of the base material 18, but as shown in FIG. 4, for example, as shown in FIG. A portion where the release agent layer 24 is not formed in the form of a spot near the vicinity may be provided. In this way, a portion where the adhesive strength adjusting layer 26 is exposed is formed in the form of a spot near the both ends of the base material 18, and the covering material 14 is attached to the postcard board.
When attached to the base material 12, it is possible to prevent the coating material 14 from being inadvertently peeled off from the postcard mount 12 from near the longitudinal edge of the base material 18.

FIG. 5 is a cross-sectional view of a principal part showing still another embodiment of the present invention, and FIG. 6 is a principal part showing a state where the covering material 14 is peeled off from the postcard backing sheet 12 in the embodiment shown in FIG. It is sectional drawing.

In this embodiment, the release agent layer 24 and the adhesive strength adjusting layer 26 are not formed so that the heat-adhesive resin layer 28 and the concealing layer 22 are directly bonded in a line at the tip portion of the covering material 14. There is a linear bonding portion 30. 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. 7 is a sectional view of a main part showing another embodiment of the present invention. In this embodiment, in particular, at the upper and lower ends of the base material 18, the adhesive layer 20, the concealing layer 22, the release agent layer 24, the adhesive force adjusting layer 26 and the heat adhesive resin layer 28, along the edges of the release agent layer 24. Thus, a cut 16a for cut and a cut 16b for cut are formed, and a cut 16c for cut is formed inside the cut 16a for cut.

In the embodiment shown in FIG. 7, 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. 9 is a main part plan view showing still another embodiment of the present invention. In this embodiment, in particular, a number of cuts 34 are formed along the periphery of the dressing 14. Also, each cut 34 is a cut adjacent to each other when viewed in the direction in which the covering material 14 is peeled off.
A linear cut portion 36a and an arc-shaped cut portion 36b are formed so that a part of 34 overlaps. If you do this,
The central part of the covering material 14 is easily peeled off.

FIG. 10 is a plan view of relevant parts 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 perspective view showing another embodiment of the present invention. FIG. 5 is a cross-sectional view of a main part showing still another embodiment of the present invention, and FIG. 6 is a cross-sectional view of a main part showing a state where the covering material is peeled off from the postcard sheet in the embodiment shown in FIG. It is. FIG. 7 is a cross-sectional view of a main part showing another embodiment of the present invention, and FIG. 8 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. 9 is a main part plan view showing still another embodiment of the present invention. FIG. 10 is a plan view of an essential part showing a modification of the embodiment shown in FIG. FIG. 11 is a partial 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, 18 is a base material, 24 is a release agent layer, 26 is an adhesive force adjusting layer, and 28 is 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 release agent layer formed on at least a part of the surface of a base material. An adhesive strength adjusting layer is formed on a main surface of the release agent layer, a heat adhesive resin layer is formed on a main surface of the adhesive force adjusting layer, and the coating material melts the heat adhesive resin layer. The adhesive strength adjustment layer is weakly adhered to the release agent layer and strongly adhered to the heat-adhesive resin layer in comparison with the adhesive strength to the release agent layer. A postcard formed with a composition such that the release agent layer and the adhesive strength adjusting layer are gradually peeled off when the coating material adhered to the postcard is peeled off from the postcard mount.