JPH03236997A - Postcard and preparation thereof - Google Patents

Abstract

PURPOSE:To dispense with the necessity of applying surface processing to postcard pasteboard, to conceal the entry part of data during mailing by heating a cover material and to allow a regular recipient to simply peel off the cover material to know the content of the data by providing a base material, a thermal adhesive resin layer and the cover material containing an adhesion inhibiting part. CONSTITUTION:Secret items 11a are formed to the rear of postcard pasteboard 11 and a cover material 12 is bonded to the pasteboard 11. The cover material 12 has a base material 14 and a concealing layer 16 formed thereto and a comb part 18 and a thermal adhesive resin layer 20 are formed to the surface of the concealing layer 16. Adhesion inhibiting parts 22 for lowering the adhesive strength of the thermal adhesive resin layer 20 are formed to the surface of the thermal adhesive resin layer 20 in a dispersed state. Since the bonding surface of the coating material 12 to the postcard pasteboard 11 are demarcated into parts where the thermal adhesive resin layer 20 is exposed as it is and the adhesion inhibiting parts 22, the parts where the thermal adhesive resin layer 20 is exposed are strongly bonded to the postcard pasteboard when the cover material is bonded to the postcard pasteboard by heating and the parts where the adhesion inhibiting parts 22 are formed are weakly bonded to the pasteboard 11.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a partially covered postcard, and mainly hides the information such as confidential information during mailing, and prevents official receipt as appropriate. Concerning postcards and their manufacturing methods, the information of which can be viewed by the recipient.

(Prior art) In recent years, there has been an increase in the number of mail items containing confidential information, such as notices of bank deposit balances, etc. However, the space for writing confidential information is hidden during mailing, and the official receipt is easy for the recipient to receive. It is desired to develop postcards that are formed so that the contents can be seen at the same time. Postcards have been developed that are shaped so that the underlying secrets can be seen.

(Problem to be Solved by the Invention) However, in order to be able to partially release the force J in this way, as seen in the above-mentioned Publication of Utility Model Publication No. 54-3789, it is necessary to apply pressure over the entire surface of the cover. By applying a drying shelf to form an adhesive surface, and applying a peeling treatment such as silicone treatment to the other postcard mount so that it can be peeled off partially, for example, only within the frame, There is a need to make the cover partially removable.

Therefore, when manufacturing them, a drying rack coating process is required on the cover side, and a peeling process such as silicone processing is required on the postcard mount side.
Inevitably, the structure of the postcard becomes more complicated, and the number of manufacturing steps increases, leading to an increase in manufacturing costs.

Therefore, the main purpose of the present invention is to eliminate the need for surface treatment of the postcard mount, and to prevent information from being written during mailing by post-processing (heating) the covering material that covers the area where information such as confidential information is written. The object of the present invention is to provide a postcard and a method for manufacturing the same, in which the portion of the postcard is hidden and the recipient can easily peel off the covering and see the contents of the official receiver.

(Means for Solving the Problems) The first invention includes a postcard mount, a postcard mount attached to the postcard mount,
A covering material for covering at least a portion of the postcard mount, the covering material comprising a base material and a thermoadhesive resin layer formed on one main surface of the base material for adhering the base material to the postcard mount. and an adhesion inhibiting portion which is formed in a dispersed manner on the surface of the heat-adhesive resin layer to reduce the adhesive force of the heat-adhesive resin layer.

The second invention includes a step of preparing a postcard mount, a step of providing a covering material for covering at least a portion of the postcard mount, and a step of pasting the covering material on the postcard mount, the step of applying the covering material to the postcard mount. The preparation process includes the step of preparing the base material, the step of forming a heat-adhesive resin layer on one main surface of the base material to attach the base material to the postcard mount, and the adhesive strength of the heat-adhesive resin layer. This is a postcard manufacturing method including a step of forming adhesion inhibiting parts in a dispersed manner on the surface of a heat-adhesive resin layer to reduce the adhesiveness.

(Function) According to this invention, the surface to which the covering material is attached to the postcard mount is
It is divided into a part where the heat-adhesive resin layer is exposed as it is and an adhesion inhibiting part to reduce the adhesive strength of the heat-adhesive resin layer, so when it is heated and attached to a postcard mount, The exposed portion of the adhesive resin layer is strongly adhered to the postcard mount, and the portion where the adhesion inhibiting portion is formed is weakly adhered to the postcard mount.

(Effects of the Invention) According to the present invention, since strongly bonded parts and weakly bonded parts coexist on the surface where the covering material is adhered to the postcard mount, the covering material can be pulled off relatively easily compared to the postcard mount. It can be peeled off and the various information printed on the main surface of the postcard mount can be seen.

Furthermore, in this postcard, since there is a strongly adhesive portion on the surface where the covering material is attached to the postcard mount, the covering material will not be inadvertently peeled off from the postcard mount.

Furthermore, postcards can be obtained by heat-adhering the covering material to the postcard mount without any processing on the postcard mount, and when producing postcards, only heat processing is required. Its scope of use is wide-ranging.

Moreover, by simply processing the covering material during manufacturing,
Since there is no need to process the postcard mount, the manufacturing process can be simplified, and the device for applying the covering material used in the manufacturing of postcards can be easily simplified.

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.

(Embodiment) FIG. 1A is a perspective view showing an embodiment of the present invention, and FIG. 1B is a sectional view of a main part thereof.

This postcard 10 includes a postcard mount 11 formed to the size of a government postcard. On the back side of this postcard mount 11, confidential information 11a, such as bank deposit balance, is formed. Further, a covering material 12 is adhered to the entire back surface of this postcard mount 11. In this embodiment, the covering layer 12 is integrally formed extending from one end of the postcard mount 11 in the width direction, and is folded back and affixed to the postcard mount 11 .

This covering material 12 includes a base material 14 that extends from one end of the postcard mount 11 in the width direction and is integrally formed. The base material 14 is made of a relatively flexible material such as paper or synthetic resin film that can be cut with scissors or the like, and a concealing layer 16 is formed on one main surface of the base material 14. .

The hiding layer 16 is formed by, for example, printing with silver ink or the like, or by laminating film materials having hiding power such as aluminum foil using an adhesive or the like.

A comb portion 18 is formed on the surface of the concealing layer 16 and has characters such as hit, miss, etc. written thereon.

Furthermore, the surface of the hiding layer 16 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. N20 is formed.

This thermally adhesive resin layer 20 has a temperature of 100°C to 2°C, for example.
It is formed so that it can be melted at a temperature of 00'C and completely adhered to a postcard mount 11 made of paper, for example.

On the surface of this thermally adhesive resin layer 20, a thermally adhesive resin layer 2
The adhesion inhibiting portions 22 for reducing the adhesion force of 0 are formed in a dispersed manner. In this embodiment, the adhesion inhibiting portions 22 are formed vertically and horizontally on the surface of the heat adhesive resin layer 20 in the form of, for example, 150 lines per inch. Note that the adhesion inhibiting portion 22 may be formed linearly only vertically or horizontally on the surface of the heat-adhesive resin layer 20.

This adhesion inhibiting portion 22 is, for example, the thermal adhesive resin layer 2
When heated and melted, a resin that has no adhesive properties or a resin that exhibits adhesive properties only at a higher temperature than the resin selected as the thermo-adhesive resin forming the thermo-adhesive resin layer 20 is appropriately selected. Formed by printing and coating.

Incidentally, in order for the comb portion] 8 to be able to be seen through the heat-adhesive resin layer 20 and the adhesion inhibiting portion 22, it needs to be transparent or semi-transparent.

However, the comb portion 18 may be formed on the surface of the adhesion inhibiting portion 22, etc., and in that case, it is not necessary to be transparent or translucent.

As an example of the thermoadhesive resin, an EVA adhesive can be selected. The composition of this adhesive 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 supplementary agents.

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.

Examples of the wax include paraffin wax, microcrystalline wax, low molecular weight polyethylene wax, physocharopschwanox, castor wax, and chlorinated paraffin.

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

Examples of thermoadhesive resins other than the above examples include polyethylene, ethylene-ethyl acrylate copolymer resin, ethylene-acrylic acid copolymer resin, ethylene-methyl acrylate copolymer resin, ethylene methyl methacrylate copolymer resin, and ethylene methacrylate. Acid copolymer resin, ionomer resin, borylpentene resin, ethylene-vinyl alcohol copolymer resin, vinylidene chloride resin, vinyl chloride-vinyl acetate copolymer resin, polyamide resin, styrene-acrylic acid copolymer resin, polystyrene resin, polyacrylic acid Copolymer resins, polyester resins, polyurethane resins, waxes, etc. can be selected. When printing or coating with these materials, it is preferable to use them while heating, or by dissolving them in a solvent or dispersing them in water.

Further, the adhesion inhibiting portion is made of a material that exhibits adhesiveness at a temperature higher than that of the thermoadhesive resin, or does not exhibit adhesiveness at all.

For example, an ultraviolet curable ink can be selected, and the ultraviolet curable ink is composed of a coloring agent, a prepolymer, a monomer, a photoinitiator, a sensitizer, and an additive. Prepolymers include epoxy acrylates, polyol acrylates, polyester acrylates, polyether acrylates, unsaturated polyesters, cationically polymerizable resins, melamine acrylates, unsaturated polybutadienes, drying oil acrylates, silicone acrylates, and the like.

Monomers include monofunctional acrylates such as 2-ethyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, and 2-hydroxyethyl methacrylate, 1.3-butanediol diacrylate-1., and 1.4-butanediol. diacrylate, ■
, 6-hexanediol diacrylate, diethylene glycol diacrylate, neopentyl glycol diacrylate-1, polyethylene glycol 400 diacrylate, hydroxypivalic acid ester neohensyl glycol diacrylate, diethylene glycol dimethacrylate, polyethylene glycol #200 dimethacrylate Trifunctional acrylates such as trimethylolpropane triacrylate, pentaerythritol 1-reacrylate, trimethylolpropane trimethacrylate 1-, trimethylolethane trimethacrylate, tetramethylolmethane tetraacrylate, dipentaerythritol hexaacrylate, etc. Examples include functional acrylate. Furthermore, vinyl ethers, itaconic acid esters, N-vinylpyrrolidone are also used.

Photoinitiators include biacetyl, acetophenone, benzophenone, Michler's ketone, Hensyl, benzoin,
Henzoin isobutyl ether, hensyl dimethyl ketal, tetramethylthiuram sulfide, azobisisobutylnitrile, benzoyl peroxide, 1-hydroxycyclohexylphenyl ketone, α-hydroxyisobutylphenone, p~isopropyl-α-hydroxyisobutylphenone Among them, benzophenone and its derivatives are particularly used.

Examples of sensitizers include aliphatic amines such as n-butylagon, di-n-butylamine, triethylamine, diethylago diethyl methacrylate, amines containing aromatic groups, nitrogen heterocyclic compounds such as piperidine, allyl amines, Sulfur compounds such as o-tolylthiourea, sodium diethyldithiophosphate, soluble salts of aromatic sulfinic acids, N
, N-disubstituted-p-asoftenzonitrile compounds, tri-n-butylphosphine, phosphorus compounds such as sodium diethylthiophosphate, nitrogen compounds such as Michler's ketone, N-nitroso-10-cydylagone derivatives, oxazoline compounds, Examples include chlorine compounds such as carbon chloride and hexachloroethane.

Examples of additives include ξ anti-strike agents, slip agents, antioxidants, desiccants, wetting agents, and wax.

Examples of colorants include organic pigments, extender pigments, carbon blanks, titanium white, and metal powders.

Next, the method for manufacturing this postcard will be explained.

First, the postcard mount 11 and the continuous paper 10a that will become the base material 14 of the covering material 12 are prepared. A postcard mount 11 and a base material 14 are continuously formed in the width direction of the continuous paper 10a. Therefore, the widthwise length of the continuous paper 10a is the total length of the widthwise lengths of the postcard mount 11 and the base material 14.

3 4 A hiding layer 16 is formed on one main surface of the base material 14 of the continuous paper 10a by printing with silver ink using a well-known printing method such as offset printing or by coating. Ru.

Next, the surface of the concealing layer 16 is appropriately abutted.

The comb portion 18 is formed by printing lines such as the 1st number.

Next, as shown in FIG. 2, the laminate obtained by winding the continuous paper 10a with the concealing layer 16 into a roll is loaded onto the holding roller 32 of the coating material manufacturing device 30.

One end of the continuous paper 10 a held by the holding roller 32 is unwound and guided to the thermal adhesive resin coating device 34 .

This thermal adhesive resin application device 34 is for printing and applying, for example, the aforementioned thermal adhesive resin 20a containing the ethylene-vinyl acetate copolymer resin as a main ingredient to the surface of the 16 hidden layers of the base material 14. The thermoadhesive resin 20a is applied while heating to an appropriate temperature.

Then, the continuous paper 10a on which the thermal adhesive resin 20a is printed and applied on the base material 14 is guided to a dryer 36 including a device that blows out cold air, and the thermal adhesive resin 20a is dried. Layer 20 is formed.

Next, the continuous paper 10a with the heat-adhesive resin layer 20 formed on the base material 14 is guided to an adhesion inhibitor application device 40 for applying an adhesion inhibitor 22a.

This adhesion inhibitor application device 40 includes an application roller 40a having a grid-like relief on its surface. This application roller 4
0a is formed, for example, as follows.

First, as shown in FIG. 3A, a photosensitive resin layer 42b is laminated and bonded on one main surface of a metal plate 42a.

Next, as shown in FIG. 3B, the surface of the photosensitive resin layer 42b where the concave portions of the relief plate are to be formed is covered with a masking material 43 made of a material that hardly transmits ultraviolet rays. In this case, the lines are formed in a lattice pattern, and the number of lines is preferably 75 to 15675 per inch, and the halftone dots to be masked are preferably 40 to 60%. The combination of the number of lines and halftone dots is preferably selected to be suitable for the melting temperature and application temperature of the thermoadhesive resin forming the thermoadhesive resin layer 20.

Then, ultraviolet rays are irradiated onto the surface of the photosensitive resin layer 42b to cure the portions that are to become the convex portions of the letterpress.

Then, the portion of the photosensitive resin layer 42b covered with the masking material 43 is removed by rinsing with a solvent to form a flat relief printing plate as shown in FIG. 3C.

Finally, the application roller 40a is formed by winding this flat relief plate around a roller.

Therefore, by this adhesion inhibitor application device 40, the adhesion inhibitor 22a is arranged on the thermoadhesive resin layer 20 in a grid pattern or in a base pattern in which the convex portions of the relief plate are arranged in squares (rectangles) one after the other. It is applied in a single pine pattern. In addition,
As the adhesion inhibitor coating device 40, a printing/coating device using a printing/coating method such as letterpress printing, gravure printing, silk screen printing, off-cent printing, etc. can also be used.

In this example, the following combinations were selected:
Appropriate peel strength could be obtained.

Next, the continuous paper 10a on which the adhesion inhibitor 22a is printed and applied on the thermoadhesive resin layer 20 is guided to the solidification device 44. In this embodiment, a high-pressure mercury lamp is used as the solidifying device 44, and is configured to irradiate at 160 W/cm for one second.

In this way, in this continuous paper 10a, as shown in FIG. A material 12 is formed.

This continuous paper 10a is then guided to a covering material applying device 50 for pasting a covering material 12 onto the postcard mount 11. At this time, in order to cover the confidential information 11a of the bank deposit balance formed on the back side of the postcard mount 1 with the covering material 12, it is necessary to cover the confidential information 11a of the bank deposit balance formed on the back side of the postcard mount 1 with the covering material 12 in advance at an appropriate place on the postcard mount 11, for example, in the lower column on the back of the postcard mount 11. It is necessary to print appropriate characters in advance. Also, attach the comb part to the postcard mount 1
Even when forming it on the first side, it is necessary to form it in advance on the part covered by the covering material 12.

In addition, when this covering material 12 is attached to the postcard mount 11, as shown in FIG.
The postcard mount 11 and the covering material 12 are laminated by folding back at the boundary between the postcard mount 11 and the covering material 12, and while pressing the surface of the postcard mount 11 with a heating roller, the exposed part of the thermoadhesive resin layer 20 and the lower layer of the adhesion inhibiting part 22 The heat-adhesive resin layer 20 is activated by heating, and the coating material 1 is applied to the surface of the postcard mount 11.
Just paste 2. Then, they are cut to an appropriate size to form this postcard 10.

The covering material 12 of this postcard 10 is strongly adhered to the postcard mount 11 in the exposed part of the heat-adhesive resin layer 20, but in the part where the adhesion inhibiting part 22 is formed, the lower heat-adhesive resin layer 20 Weakly bonded. therefore,
As shown in FIGS. 6A and 6B, the cover material 12 can be peeled off relatively easily from the postcard mount 11 to reveal the secret information 11a and the lottery section 18.

Furthermore, the covering material 12 of this postcard 10 is weak against the postcard mount 11 in the exposed portion of the heat-adhesive resin layer 20 (
Since it is adhered, it will not be accidentally peeled off from the postcard mount 11.

In addition, the materials for the postcard mount 11 and the base material 14 include:
In the embodiment, the continuous paper 10a is wound into a roll.
However, a so-called single wafer type base material separated into each piece may also be selected.

Further, the surface of the base material 14 may be appropriately printed with printing suitable for the properties of postcards 9 0 , and in the case of a continuous postcard as in the above-mentioned embodiment, for example, to detect the feed pitch of the base material 14. The detection mark (arrow) may be printed in black or the like.

In the embodiment described above, the adhesive light-impairing portions 22 are formed in a lattice shape, but they may also be formed in a dot shape arranged vertically and horizontally.

FIG. 7A is a perspective view showing another embodiment of the present invention,
FIG. 7B is a sectional view of the main part thereof.

In this embodiment, in particular, the covering material 12 covers the postcard mount 11.
It is formed to extend from the lower end of the postcard mount 1 and is attached to the lower part of the postcard mount 1 as part of its surface.

As in this embodiment, the covering material 12 may be formed extending from any end of the postcard mount 11, or may be attached to the surface of the postcard mount 11.

FIG. 8A is a perspective view showing still another embodiment of the present invention, and FIG. 8B is a sectional view of a main part thereof.

In this embodiment, in particular, the covering material 12 covers the postcard mount 11.
It is formed separately from the postcard mount 11 and is attached to the lower part of the surface of the postcard mount 11. As in this embodiment, the dressing 12 is
It may be formed separately from the postcard mount 11.

In each of the embodiments described above, cuts may be formed in the dressing along its periphery. If you form a cut like this,
Only the central part of the covering can be removed. In this case, as shown in FIG. 9, one cut 24 is cut into a linear cut portion 24a and an arcuate cut portion so that a portion of adjacent cuts 24 overlap when looking at the coating material 12 in the non-peeling direction. By forming the cut portion 24b, the center portion of the covering material 12 can be easily peeled off. In order to be able to easily peel off the central part of the adhesive material in this way, for example, as shown in FIG. The base material 14 may be formed diagonally so that the cuts 24 partially overlap.

In the postcards shown in Figures 9 and 10, when the covering material is pulled in the direction indicated by the arrow, the covering material between adjacent cuts is torn, as shown by the dashed-dotted arrow in the figure. 2 The covering material in the area surrounded by the cut should be peeled off.

[Brief explanation of drawings]

FIG. 1A is a perspective view showing an embodiment of the present invention, and FIG. 1B is a sectional view of a main part thereof. FIG. 2 is an illustrative view showing an example of a manufacturing apparatus for manufacturing the postcards shown in FIGS. 1A and 1B. 36 to 3C are illustrative views showing an example of the manufacturing process of the coating roller of the manufacturing apparatus shown in FIG. 2, respectively. FIG. 4 is a perspective view showing the state before the covering material is adhered to the postcard mount. FIG. 5 is a perspective view showing a state in which the covering material is folded back and adhered to a postcard mount. FIG. 6A is a perspective view showing a state in which the covering material is peeled off from the postcard mount, and FIG. 6B is a sectional view of the main part thereof. FIG. 78 is a perspective view showing another embodiment of the invention,
FIG. 7B is a sectional view of the main part thereof. FIG. 8A is a perspective view showing still another embodiment of the present invention, and FIG. 8B is a sectional view of a main part thereof. FIG. 9 is a plan view of main parts showing 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. In the figure, 10 is a postcard, 11 is a postcard mount, and 11a
12 is a secret matter, 12 is a covering material, 14 is a base material, 16 is a concealing layer, 18 is a comb portion, 20 is a thermoadhesive resin layer, and 22 is an adhesion inhibiting portion.

Claims (1)

[Scope of Claims] 1. A postcard mount, and a covering material attached to the postcard mount to cover at least a portion of the postcard mount, the covering material comprising: a base material; one principal surface of the base material; a thermoadhesive resin layer for adhering the base material to the postcard mount; A postcard containing an adhesion inhibiting part to reduce adhesion. 2. A step of preparing a postcard mount, a step of preparing a covering material for covering at least a portion of the postcard mount, and a step of attaching the covering material to the postcard mount, the step of preparing the covering material , a step of preparing a base material, a step of forming a heat-adhesive resin layer on one main surface of the base material for adhering the base material to the postcard mount, reducing the adhesive strength of the heat-adhesive resin layer. A method for producing a postcard, the method comprising the step of forming adhesion inhibiting portions in a dispersed manner on the surface of the heat-adhesive resin layer.