JPH0742761Y2 - Card with cover sticker - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a card with a cover sticker, and in particular, the contents described in all or a part of the area of the card substrate are sealed with a simple structure. The present invention relates to a card with a cover sticker.

(Prior Art) A sticker paper including a laminate composed of two layers of peelable integrated transparent films covers the surface of cards such as postcards, and when the recipient peels off the sticker paper, a two-layer film is formed. Various postcards with seals have been proposed in which the transparent film is separated so that one transparent film remains on the sealing surface of the card.

According to such a postcard with a seal, information that would otherwise be mailed in a sealed letter can be sent at a postcard fee.
The cost is significantly reduced.

However, since the coated seal used for that purpose requires at least a surface coated paper and a film laminate for peeling, the manufacturing process is complicated and the raw material cost is high, and most of the mailing cost reduction is due to the postcard processing cost. Will be offset.

(Means for Solving the Problems) Therefore, an object of the present invention is to provide a postcard with a cover and seal which can extremely easily cover the sealed surface of the card.

Accordingly, an object of the present invention is to provide a card substrate having a sealed surface on one side and a tubular body obtained by inflation molding a thermoplastic composition containing 3 to 18% by weight of vinyl acetate and the balance of ethylene. And a laminate composed of a pair of transparent films formed by press-bonding opposite wall surfaces so that they can be peeled off from each other immediately after the molding step, and the lower surface of one film of the laminate has a pressure-sensitive adhesive layer interposed therebetween. It is adhered to the sealed surface of the card base material, the upper surface of the other film is subjected to a surface treatment for giving sufficient concealing property to the sealed surface, and the peripheral portion of the laminate has the pair of This is achieved by a card with a cover seal, which is characterized in that a heat seal is formed for fixing the films to each other.

(Function) In the card with a coated seal of the present invention, the sealed surface of the card substrate is always covered with the film laminate, and the surface treatment applied to the upper surface of one film sufficiently hides the description of the sealed surface. To be done. When the recipient tries to peel off this laminate, peeling occurs between the film layers made of a resin composition containing vinyl acetate and ethylene that are press-bonded in a hot manner so that one of the surface-treated films is peeled off. , The other transparent film is left on the sealing surface.

This film laminate can be easily obtained by flatly pressing a hollow bag obtained by inflation molding an EVA (ethylene-vinyl acetate) -based thermoplastic composition, which is a polymer mainly containing ethylene. For EVA,
A composition comprising 3 to 18% by weight of vinyl acetate and the balance being ethylene is used. The die temperature during inflation molding is about 120 to 210 ° C.

The peeling strength (180 ° C. peeling: 10 mm width) of the bonding surface of this film laminate is usually several grams to several tens of grams, which is 1% when compared to the peeling strength of an ordinary pressure-sensitive adhesive on the order of several hundreds of grams. It shows a value that is lower by several digits.

Further, the peel strength at the bonding surface between the films is relatively small as described above, but in normal handling, there will be no displacement or peeling between the films unless a trigger for peeling is given to the laminated end faces of the films.

As the film, in addition to the above-mentioned copolymer such as EVA, a polymer substantially composed of ethylene, that is, polyethylene can be used. A lubricant such as oleic acid amide is added to a raw material for ordinary inflation molding in order to form a synovial membrane on the surface of the obtained film.
However, in the case of the present invention in which the molded polyethylene films are positively pressed against each other, no such lubricant is used.

The upper surface of one film of the laminate is subjected to a surface treatment for providing the transparent film with sufficient hiding power. As such a treatment, it is conceivable to form a silver paste or a white paint on the entire surface of the film by a printing means or the like, but only by printing a mesh or a symbol character at a position overlapping with the description of the underlying sealed surface. However, sufficient hiding power can be obtained.

The bonding between the films of the laminate according to the present invention does not cause any displacement or peeling during normal handling, but in order to make this bonding more reliable, the periphery of the film laminate is heat-sealed or the like. It

It should be noted that the transparent film surface after peeling does not have tackiness at all as when peeling the bond with a normal pressure-sensitive adhesive, and the sealing surface may be re-bonded or adhered to another object after peeling. There is no.

The thickness of each film of the laminate may be arbitrary, but in order to make the film on the surface side function as a coated paper, and in terms of workability in providing slits for peeling, it is desirable that the film be as thick as possible. .

There are various concrete examples of the present invention. For example, a postcard with a seal for concealing a specific portion of one side of a postcard, an upper surface of a laminate film, and a lower surface of a card base material. In addition, it includes the form of a reciprocal postcard in which the destinations for outgoing and incoming communications are printed respectively.

Embodiment 1 Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

EVA copolymer with MI (melt index) = 1.0 g / 10 min containing 10% by weight vinyl acetate (Asahi Kasei product,
Product name: EF1010) Inflation molding machine caliber 40cm
Heated and touched at a temperature of about 130 ℃ with a screw cylinder of
A 100 μm thick film was inflation-molded from a ring die into a hollow cylinder.

As shown in FIG. 1, the formed tubular material F is pressure-bonded into a bag shape by the press rollers R, R above the cooling zone Z, and the opposing tubular walls are joined and integrated along the joining surface S. I let it cool.

The transparent ethylene-vinyl acetate films 2 and 3 formed as described above are bonded to each other by so-called wetting during press bonding to form a film laminate 1, and the peel strength (180 degree peel) between them is It was about 10 g / cm.

With respect to the transparent film laminate 1 thus obtained, heating rollers H, H
Heat seal by. Depending on the case, heat seal is applied at a predetermined interval in the direction perpendicular to the flow of the film 1.
The four sides of the card obtained from may be heat-sealed.

Next, in the processing part P, a concealing layer 4 made of white paint is formed on the upper surface of one film 2 of the film laminate 1, and an adhesive layer 5 made of a normal pressure-sensitive adhesive is formed on the lower surface of the other film 3. It Next, the silicone release paper 6 is attached to the adhesive layer 5 by the rollers T, T.

On the other hand, as shown in FIG. 2, a destination or the like is printed on the front surface area 9 of the postcard card paper 8 and communication information or the like is printed on the area 10 on the inner surface as the sealed surface.

Then, the films 2 and 3 obtained as shown in FIG.
The release paper 6 is removed from the adhesive to expose the adhesive layer 5, and the postcard 8
By adhering it to the seal area (10), a postcard card having information sealed inside is created.

In the figure, 11 is a heat-sealed area formed on the peripheral portions of the films 2 and 3, and 12 is a perforation line or the like formed inside them.

Such a postcard with a seal is suitable for sending important information in terms of personal privacy in the form of a simple postcard because the description on the seal surface 10 is always covered from the outside.

Since the films 2 and 3 of the film laminate 1 are bonded to each other with a predetermined peel strength as described above, in normal handling, misalignment or peeling occurs at the bonding surface S between the films 1 and 2, and a card mount for postcards is produced. There is no danger of dropping from 8.

In particular, since the heat seal area 11 is formed in the peripheral portion of the film laminated body 1, the bonding between the films 2 and 3 becomes extremely reliable.

When the recipient opens the sticker, cut off the line as shown in Fig. 3.
When the edge of the card is bent along 12 and a slit is formed inside the heat-sealing area 11, the bonding surface S of the films 2 and 3 is easily peeled off by using this portion, and the film 3 is attached by the adhesive layer 4. Only the film 2 is peeled off, leaving the sealing surface 10. Therefore, the recipient can read the information written on the sealed surface through the transparent film 3.

The bonding between the films 2 and 3 does not leave any tackiness on the surface to be sealed of the card after peeling, unlike the case of using an ordinary pressure-sensitive adhesive, so that the postcard after open-sealing can be easily handled and stored. Further, the once-opened sealed surface cannot be returned to the original joined state as it is, so that it is easily found that the seal is broken during the process.

(Effect of the Invention) In the present invention, since the laminate composed of a pair of films has both the functions of the conventional sealing paper and the film integrating material between the sealing paper and the substrate, the structure and the manufacturing process are improved. Is extremely simplified.

[Brief description of drawings]

FIG. 1 is an elucidated view showing a manufacturing process of a film laminate used in the present invention, FIG. 2 is an explanatory view showing a cross section of an embodiment of the present invention, FIG. 3 is a plan view of the embodiment, and FIG. FIG. 4 is an explanatory view showing a cross section of another embodiment of the present invention. 1 ... Film laminate 2, 3 ... Transparent film 4 ... Surface treatment (concealment treatment) 5 ... Adhesive layer 8 ... Card base material 10 ... Card sealed surface 11 ... Heat-sealed area 12 ... Perforation line

Claims (1)

[Scope of utility model registration request] 1. An opposing wall surface of a tubular body obtained by inflation molding a card substrate having a sealed surface on one side and a thermoplastic composition containing 3 to 18% by weight of vinyl acetate and the balance of ethylene. And a laminate composed of a pair of transparent films formed by press-bonding each other so that they can be peeled off from each other immediately after the molding step, wherein the lower surface of one film of the laminate is a card with a pressure-sensitive adhesive layer interposed therebetween. The film is adhered to the sealed surface of the base material, the upper surface of the other film is subjected to a surface treatment for providing sufficient concealing property to the sealed surface, and the pair of films is provided on the peripheral portion of the laminate. A card with a cover seal, characterized in that heat seals are formed for fixing them to each other.