JPH0431089A - Postcard - Google Patents

Abstract

PURPOSE:To obtain a postcard, from which a covering material is peeled gradually and is easy to be peeled when the covering material is peeled, by forming an adhesion adjusting layer between the covering material and a heat-bonding resin layer. CONSTITUTION:A postcard 10 includes a postcard mount 12 formed in the size of a government postcard and a covering material 14 stuck to one part. Cuts 16 for separation are formed to the covering material 14. In the covering material 14, an adhesive layer 20 is formed on one main surface of the base material 18 of a flexible cutting-able blank, and a concealing layer 22 is shaped. The concealing layer 22 is formed by laminating an aluminum foil, etc. with the adhesive layer 20, but it may be formed by printing ink. A release agent layer 24 is formed to one part of the surface of the concealing layer 22, an adhesion adjusting layer 26 is formed, and a heat-bonding resin layer 2 is shaped. The material of the adhesion adjusting layer 26 is selected by relationship with the release agent layer 24, and polyvinyl methyl ether, etc. are employed as the material of the adhesion adjusting layer 26 when polyethylene is selected as the release agent layer 24.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to postcards, and in particular, for example, the confidential information part is hidden during mailing, and the official receipt is concealed after the recipient receives the postcard. The present invention relates to a postcard which can include a top part as appropriate.

(Prior Art) In recent years, there has been an increase in the number of mail items containing confidential information, such as notices of bank account balances, etc. !
2 Postcards have been developed in which the @ is hidden during mailing, but the recipient can relatively easily view the contents after receiving the official receipt.

FIG. 11 is a partial sectional view of a conventional postcard of this type.

This postcard 1 is a postcard mount 2 shaped to the size of an official postcard.
This includes a covering material 3 stuck 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 base material 4 . On one main surface of the adhesive layer 5,
A concealing layer 6 made of aluminum is formed. The base material 4 and the hiding layer 6 are bonded together by an adhesive layer 5. hidden layer 6
A release agent layer 7 is formed on one main surface. A thermoadhesive 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 . In the covering material 3, a heat-adhesive resin layer 8 is heated and melted, and is adhered to the postcard mount 2.

(Problem B that the invention seeks to solve) However, although conventional postcards have various advantages, when the covering material is removed, it comes off with a sharp tingle and is difficult to remove.

Therefore, the main purpose of the present invention is to allow a regular receiver to peel off the covering material relatively easily after picking up the receiver and see the information underneath, and to be able to remove the covering material. To provide a postcard that gradually peels off and is easy to peel off.

(Means for Solving the Problems) The present invention includes a postcard mount and a covering material that is attached to the postcard mount and covers at least a portion of the substrate, and the covering material covers at least a portion of the surface of the substrate. A release agent layer is formed on the main surface of the release agent layer, an adhesive force adjustment layer is formed on the main surface of the adhesive force adjustment layer, a heat adhesive resin layer is formed on the main surface of the adhesive force adjustment layer, and the covering material is the heat adhesive resin layer. It is a postcard that is melted and attached to a postcard mount.

(Function) The heat-adhesive resin layer formed on the back side of the covering material is heated and pressurized on the surface of the postcard mount, thereby melting the heat-adhesive resin layer and pasting it onto the postcard mount. Ru. Since an adhesive force adjustment layer is formed between the covering material and the heat-adhesive resin layer, when the covering material is peeled off from a single piece of postcard, it will gradually peel off and be easily peeled off.

(Effects of the Invention) According to the present invention, when a thermoadhesive resin is used to adhere a covering material to a postcard mount, when the covering material is peeled off from a single piece of postcard, the adhesive force adjustment layer Since it is formed between the and the heat-adhesive resin layer, it gradually peels off and is easy to peel off.

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

This postcard 10 includes a postcard mount 12 formed to the size of an official postcard and a covering material 14 attached to a part of the postcard mount 12. This covering material 14 has cut-off cuts 16.
is formed.

The covering material 14, which is attached to the surface of the postcard mount 12, particularly on the part where the image forming part such as confidential information such as financial information or insurance information is formed, is mainly based on FIG. explain.

The covering material 14 includes a base material 18 made of a material that is relatively flexible and can be cut by hand or with scissors, such as a paper 2 synthetic resin film.

An adhesive layer 20 is formed on one main surface of the second base material 18 . As the adhesive forming this adhesive layer 20, 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 22 is formed on one main surface of the adhesive layer 20. The hiding layer 22 is formed by laminating film materials having a hiding power such as aluminum foil with the adhesive strength of the adhesive layer 20, but may also be formed by printing with a masking ink, for example.

A part of the surface of the concealing layer 22 is formed with a release agent layer 24 coated with a release agent such as polyethylene, silicone resin, fluorine resin, paraffin, and Wanx.

An adhesive force adjustment layer 26 is formed on the surface of the hiding layer 22 on the release agent layer 24 side.

The main surface of the adhesive force adjustment layer 26 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. A synthetic resin layer 28 is formed.

This thermally adhesive resin layer 28 is heated at 60°C to 2°C, for example.
It is formed so that it softens and melts at a temperature of 00°C and can be completely adhered to the postcard mount 12.

The cutting cuts 16 are formed slightly inside the left and right ends of the release agent layer 24 . Further, the cutting cut 16 is formed on the base material 18. Adhesive layer 20. Hiding layer 22, release agent layer 24. It is formed on both the upper and lower ends of the adhesive force adjustment layer 26 and the thermal adhesive resin layer 28.

Then, at the tip of the covering material 14, a linear adhesive portion where the release agent layer 24 is not formed is formed so that the thermal adhesive resin layer 28 and the hiding layer 22 side of the base material 18 are directly adhered to each other in a linear manner. There are 30. In the part where the release agent layer 24 is formed, the base material 18 and the thermally adhesive resin layer 28 are weakly bonded, and in the line-shaped adhesive part 30 where the release agent layer 24 is not formed, the base material 18 and the thermal adhesive resin layer 28 are weakly bonded. It is strongly adhered to the adhesive resin layer 28. Therefore, it is sufficient to cut it off at the cutting cut 16.

Then, on the surface of the postcard mount 12, an information section 32 in which confidential matters are written is formed. In addition, the information department 32
In order to be able to see through the thermal adhesive resin layer 28 and the adhesive force adjustment layer 26, the thermal adhesive resin layer 28 and the adhesive force adjustment layer 26 need to be transparent or translucent.

The covering material 14 is adhered to the postcard mount 12 on the surface of the thermoadhesive resin layer 28 .

FIG. 3 shows a state in which the postcard 10 has been cut off at the cut-off cut 16 and the covering material 14 has been peeled off. Information department 32
can be seen through the heat-adhesive resin layer 28 and the adhesive force adjustment layer 26.

In addition to the above embodiments, examples of the base material 18 include synthetic paper, cellophane, polyethylene, polyester films, and aluminum foil. , release agent layer 24
It is preferable to select a material that is relatively flexible so that the coating material 14 does not inadvertently peel off due to the adhesive force with the adhesive force adjustment layer 26 in the area where the coating material 14 is formed.

Furthermore, if a material with excellent hiding properties, such as aluminum foil, is selected as the base material 18, it is not necessary to form the hiding layer 22 as in the previous embodiment.

The material of the adhesive force adjustment layer 26 is selected in relation to the release agent layer 24. For example, when polyethylene is selected as the resin for forming the release agent layer 24, the adhesive force adjustment layer 26
Examples of materials 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 2 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 etc. and polyethylene wax,
Waxes such as paraffin wax, montan wax, and microcrystalline wax, vinyl chloride/vinyl acetate copolymer, and nitrocellulose can be selected.

Then, the adhesion force adjusting layer 26 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 24, and the adhesive force adjustment layer 26 was formed. When the blending ratio is 40 to 240 parts of chlorinated polypropylene to 100 parts of vinyl chloride/vinyl acetate copolymer, the best results are obtained when 120 parts of chlorinated polypropylene is blended. It was done.

Further, in the above embodiment, a mixed solution of a block copolymer of styrene/butadiene/styrene and a vinyl chloride/vinyl acetate copolymer is applied to the polyethylene layer, that is, the release agent layer 24, and the adhesive force adjusting layer 26 is 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 10 parts of the styrene/butadiene/styrene block copolymer was blended.

As an example of the thermoadhesive resin, an EVA adhesive is selected. Its composition consists of EVA (ethylene-vinyl acetate copolymer resin), a tackifier, a wax, and an antioxidant, and a plasticizer and a 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, Fissocher Tropschwa, and 7x.

Examples include castor wax and chlorinated paraffin.

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

Examples of heat-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, and 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 wax, etc. can be selected. When printing or coating these, they may be used as appropriate while being heated, dissolved in a solvent, or dispersed in water.

The covering material 14 is adhered to the postcard mount 12 by melting the heat-adhesive resin layer 28 by heating. If heating is performed only after confirming that the covering material 14 is superimposed on the postcard mount 12 at the optimum position, the covering material 14 will be accurately adhered to the optimum position on the surface of the postcard mount 12. 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 a cut-off cut 16 is formed in the covering material 14, even if the content of the genuine receiver is seen by a third party who is not the recipient, the cut-off cut 16 will be damaged. The receiver will know that the contents have been viewed by the recipient.

According to the present invention, since the adhesive force adjustment layer 26 is formed between the coating material 14 and the heat-adhesive resin layer 28, the coating material 14
When it is peeled off from the postcard mount 12, it peels off smoothly and is easy to peel off.

In the embodiment described above, the release agent layer 24 is formed in the shape of a band at appropriate intervals in the width direction of the base material 18. For example, as shown in FIG. A spot-shaped portion where the release agent layer 24 is not formed may be provided in the vicinity.

In this way, spots where the adhesive force adjustment layer 26 is exposed are formed in the vicinity of both edges of the base material 18, and when this coating material 14 is pasted on the postcard mount 12, This can prevent the covering material 14 from being inadvertently peeled off from the postcard mount 12 near the longitudinal edges of the base material 18.

FIG. 5 is a sectional view of a main part showing still another embodiment of the present invention, and FIG. 6 is a main part showing a state in which the covering material 14 is peeled off from the postcard mount 12 in the embodiment shown in FIG. FIG.

In this embodiment, the release agent layer 24 and the adhesive force adjustment layer 26 are not formed at the tip of the covering material 14 so that the thermally adhesive resin layer 28 and the hiding layer 22 are directly bonded in a line shape. A line-shaped adhesive portion 30 is present. Even with such a configuration, the covering material 14 can be easily peeled off from the postcard mount 12 by cutting it off at the cutting cut 16.

FIG. 7 is a sectional view of a main part showing another embodiment of the present invention. In this embodiment, in particular, the substrate 18.adhesive layer 20.
Hidden layer 22. Release agent layer 24. Separation cuts 16a and separation cuts 1 are provided along the edges of the release agent layer 24 at both upper and lower ends of the adhesive force adjustment layer 26 and the thermoadhesive resin layer 28.
6b is formed, and further, a separation cut 16c is formed inside the separation cut 16a.

In the embodiment shown in FIG. 7, the base material 18 between the cutting cuts 16a and 16c can be separated, as shown in FIG. In addition, this cutting cut 16
A recess may be formed at the tip of the base material 18 between a and 16C to make it easier to catch fingers or nails,
Alternatively, a lip may be formed to make it easier to pick with fingers.

FIG. 9 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 circumference of the dressing 14. Further, each cut 34 is formed into a linear cut portion 3 so that a portion of adjacent cuts 34 overlap when viewed in the direction in which the covering material 14 is peeled off.
6a and an arcuate cut portion 36b. In this way, the central portion of the covering material 14 can be easily peeled off.

FIG. 10 is a plan view of essential parts showing a modification of the embodiment shown in FIG. 9. In this embodiment, in particular, linear cuts 34 are formed diagonally around the base material 18 so that adjacent cuts 34 partially overlap when viewed in the direction in which the covering material 14 is peeled off. Even in this case, the center portion of the covering material 14 can be easily peeled off. In addition, in the embodiment shown in FIG.
Although the covering material 14 is attached to a part of the postcard mount 12, the covering material 14 may be attached to the entire postcard mount 12 as in this embodiment.

[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 the line ■■ in FIG. 1. FIG. 3 is a partial 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 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 in which the covering material is peeled off from a postcard mount 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. be. FIG. 9 is a plan view of main parts showing still another embodiment of the present invention. FIG. 10 is a plan view of essential parts showing a modification of the embodiment shown in FIG. 9. 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 adjustment layer, and 28 is a thermoadhesive resin layer. Patent applicant Omatsu Chemical Industry Co., Ltd. Agent Patent attorney Oka 1) Zen Kei Figure 11 Figure ■7. 7 Figure Figure 6 Figure Figure 9 Figure 6a 6b Figure 10

Claims (1)

[Scope of Claims] A postcard mount, and a covering material attached to the postcard mount and covering at least a portion thereof, the covering material having a release agent layer formed on at least a portion of the surface of the substrate. an adhesive force adjustment layer is formed on the main surface of the release agent layer, a heat adhesive resin layer is formed on the main surface of the adhesive force adjustment layer, and the coating material melts the heat adhesive resin layer. A postcard attached to the above-mentioned postcard mount.