JPH054475A - Unfolding information sheet - Google Patents

Abstract

PURPOSE:To produce information sheet at a low cost by a method wherein the pressure-sensitive sheet provided with the adhesive layers adapted to become adhesive only under pressure is placed between two opaque sheets or folded opaque sheets and they are pressed together under pressure. CONSTITUTION:This invention is embodied in an removable adhesive postcard 8. A continuous postcard sheet 1 having various information 3 printed or recorded in its opaque sheet is folded double along the central perforation 2 thereof, so that the surface will come on the inside, and a pressure-sensitive adhesive sheet 5 provided with the adhesive layers 6 adapted to become adhesive only under pressure is placed between the folded opaque sheets 4 and they are pressed together under pressure to obtain a sheet 7. This sheet 7 is then cut into unfolding adhesive postcards 8. The removable adhesive postcard 8 can be removed to confirm the information on the one face and the pressure- sensitive adhesive sheet 5 is then removed to confirm the information on the other face.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a releasable information sheet in which information on a joint surface can be seen by peeling again.

[0002]

2. Description of the Related Art A sheet having two sheets provided with information by printing or recording, or one sheet folded in two, and an adhesive layer provided on both sides of two films pseudo-bonded between the sheets. After peeling, it is obtained by joining the sheets by applying pressure or heating, and re-peeling designed so that information can be confirmed by re-peeling from the pseudo-joined part of the film if necessary. Sex postcards are expected to grow in demand in the future due to the merit of mailing more information or confidential information at a postcard fee than general-purpose postcards. However, since such a postcard requires a laminate of a plurality of films as a transparent support, the cost required for processing is considerably high.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an inexpensive removable information sheet.

[0004]

Means for Solving the Problems As a result of various studies to achieve the above-mentioned object, the present inventors have found that an opaque support is provided with an adhesive layer showing adhesiveness only under high pressure on both surfaces. The present invention has been found to be achieved by using a pressure-adhesive sheet and has reached the present invention.

The present invention provides a pressure-sensitive adhesive property comprising two opaque sheets having information or an opaque sheet folded in two, and an adhesive layer having adhesiveness only under high pressure is provided on both sides of an opaque support. It is a removable information sheet obtained by pressure-bonding after sandwiching a sheet.

[0006]

In order to specifically describe the removable information sheet of the present invention, a case of a postcard will be described as an example with reference to the drawings. FIG. 1 is a plan view showing a postcard continuous sheet 1 obtained by printing or recording information 3 and the like on an opaque sheet.
2 is a cross-sectional view taken along the line AA of the postcard continuous sheet 1 of FIG. FIG. 3 is a plan view showing a pressure-sensitive adhesive sheet 5 in which an adhesive layer that exhibits adhesiveness only under strong pressure is provided on both surfaces of an opaque support. 4 is a cross-sectional view of the pressure-sensitive adhesive sheet 5 of FIG. 3 taken along the line BB. Figure 5
Is folded in two at the central perforation 2 so that the surface of the continuous sheet 1 for postcards is on the inside, and the pressure-sensitive adhesive sheet 5 of FIG. 3 is sandwiched between the sheets and pressure-bonded. It is a top view which shows the obtained sheet 7. This sheet is subsequently cut to form a releasable postcard 8 in a plan view as shown in FIG. Note that FIG. 7 is a sectional view of the removable postcard taken along the line C-C.

The removable postcard 8 thus obtained is shown in FIG.
The information on one side can be confirmed by peeling off as shown in the plan view and the cross-sectional view of FIG. Further, as shown in the plan view of FIG. 10 and the cross-sectional view of FIG. 11, the pressure-sensitive adhesive sheet 5 can be peeled and removed to confirm the information on the other surface.

FIG. 12 is a plan view showing a postcard continuous sheet 1 obtained by printing or recording the information 3 and the like on an opaque sheet. 13 is a continuous sheet 1 for postcards shown in FIG.
It is sectional drawing in the FF line of FIG. FIG. 14 is a plan view showing a pressure-sensitive adhesive sheet 5 in which an adhesive layer having adhesiveness only under high pressure is provided on both surfaces of an opaque support. 15 is a cross-sectional view of the pressure-sensitive adhesive sheet 5 of FIG. 14 taken along the line GG. 16 shows that the postcard continuous sheet 1 shown in FIG.
FIG. 15 is a plan view showing a sheet 7 obtained by sandwiching the pressure-sensitive adhesive sheet 5 of FIG. 14 between the sheets and performing pressure bonding.
This sheet is subsequently cut to form a releasable postcard 8 in a plan view as shown in FIG. Note that FIG. 18 is a cross-sectional view taken along the line HH of the removable postcard.

The removable postcard 8 thus obtained is shown in FIG.
By peeling as shown in the cross-sectional view of FIG. 9, information on the partially bonded surface can be confirmed. Furthermore, as shown in the cross-sectional view of FIG. 20, the pressure-sensitive adhesive sheet 5 can be peeled and removed to confirm the information on all joint surfaces.

Since the removable information sheet of the present invention uses a pressure-sensitive adhesive sheet which exhibits substantial adhesiveness only under a strong pressure, a release sheet adjacent to the adhesive layer is not required. That is, the removability information sheet can be provided inexpensively and efficiently.

Examples of the adhesive include ethylene-vinyl acetate resin, acrylic resin, vinyl chloride resin, vinylidene chloride resin, styrene-butadiene resin, acrylonitrile-butadiene resin, natural rubber resin,
Examples thereof include colloidal silica-acrylic resin composites, and among them, those having a glass transition point of 10 ° C. or lower are preferable. In addition, these may be used in combination if necessary.

A pigment for adjusting the adhesiveness is added to the adhesive layer as required, and specifically, colloidal silica, silica, kaolin, clay, calcium carbonate, aluminum hydroxide, zinc oxide, titanium oxide. , Melamine resin particles, benzoguanamine resin particles and the like. Incidentally, the pigment is usually used in the range of 10 to 500% by weight with respect to the adhesive.

Further, if necessary, the adhesive layer may be further water-soluble such as casein, agar, gum arabic, sodium alginate, starch, oxidized starch, esterified starch, carboxymethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol, polyvinylpyrrolidone and polyacrylic acid. Polymers, rosin resins and their derivatives, terpene resins, coumarone indene resins, xylene resins, alkylphenol resins, C _{5 to} C ₉ petroleum resins and other tackifiers, various paraffin waxes, fatty acids and their derivatives,
Release agents such as higher alcohols, metal soaps and silicones, starch particles for improving blocking resistance, pulp powder, silicone fine particles, adhesive-containing capsules and oil capsules for improving adhesiveness, antistatic agents, You may add auxiliary agents, such as a thickener, a dispersant, a preservative, an antioxidant, and a defoaming agent.

As the coating liquid used for forming the adhesive, either an aqueous system or an organic solvent system can be used.
Usually, an aqueous coating liquid in which the adhesive is an emulsion is used. The adhesive layer is formed by applying a coating liquid containing the above components to a dry weight of usually ² to ²⁰ g / m ² by a coating method such as an air knife coater, a blade coater or a bar coater, or a printing method such as screen printing or flexographic printing. It is formed by coating on a support.

Among the adhesive layers thus provided, measurement based on JIS K 6833-1980 when the surfaces of the adhesive layers are overlapped facing each other and a pressure of 1 kg / cm ² is applied to bond them. Shows a T-type peeling force of 10 g / 25 mm or less, and a T-type peeling force of 50 g / 25 mm or more when the surfaces of the adhesive layers are stacked facing each other and a pressure of 300 kg / cm ² is applied to bond them. Those having the settings shown are particularly preferable because the balance between adhesiveness and releasability is extremely good when the removable postcard of the present invention is formed.

The opaque support used for forming the pressure-sensitive adhesive sheet includes, for example, high-quality paper, synthetic paper, impregnated paper, laminated paper and the like. The paper making method used for these is not particularly limited, and recycled paper recycled pulp may be contained. Further, the opaque support may be printed with general information such as advertisements and explanatory notes to increase the amount of information, or a copy-forgery-inhibited pattern may be printed to enhance the concealment function.

In the present invention, the pressure-sensitive adhesive layer is provided on both surfaces of the opaque support as described above, but the adhesive layers are not always the same composition. A transparent or white or colored adhesion-suppressing layer may be formed on the adhesive layer as needed, and / or a fine pattern (background pattern).
The adhesion-suppressing layer is usually provided by applying or printing an oily or aqueous coating liquid or ink. The smear amount is usually 0.2 to 10 g / solid content
m ² . If necessary, the pressure-sensitive adhesive sheet is printed with information or the like, perforated and marginal-processed and wound.

Examples of the opaque sheet used for information (postcard) in the present invention include high-quality paper, synthetic paper, impregnated paper, laminated paper, metal vapor-deposited paper, coated paper for printing (slightly coated paper, coated paper). , Art paper, cast coated paper, etc.), recording coated paper (heat sensitive recording paper, pressure sensitive copying paper, electrostatic recording paper, thermal transfer image receiving paper, printing paper, ink jet recording paper, etc.) and the like. The paper making method used for these is not particularly limited, and recycled paper recycled pulp may be contained.

In the case of a postcard, the above-mentioned sheet is usually Z-folded or wound after printing a tint block and information, recording by a printer, and processing such as perforation and marginal as appropriate. The continuous sheet for postcards thus obtained is double-folded or folded in two, and at the same time, the pressure-sensitive adhesive sheet is sandwiched between the sheets, and subsequently subjected to pressure treatment and cutting treatment to form a removable postcard.

For these treatments, a machine is generally used, which is equipped with an appropriate place for slitting, cutting, folding and pressing the sheet. The pressure treatment is usually 50 to 1000 kg / cm using a pressure roll.
It is carried out under a pressure of ² . At that time, the sheet 30 ~ 6 in advance
The one equipped with a heating device is more preferable because the adhesive force becomes stable when heated to 0 ° C.

The recording apparatus used in the present invention may be a wet or dry electrophotographic method, a thermal transfer method, a thermal recording method, an electrostatic recording method, an electrolytic recording method, an impact method, an ink jet method, a silver salt photography method or the like. Equipment is used. For printing, offset printing, letterpress printing, flexo printing, gravure printing, screen printing and the like are used.

Examples Hereinafter, examples of the present invention will be described, but it goes without saying that the present invention is not limited to these examples. Unless otherwise specified, “part” in the examples means “part by weight”, and “%” means “% by weight”.

Example 1 (Preparation of pressure-sensitive adhesive sheet) 100 parts (dry weight) of acrylic ester emulsion (manufactured by Japan Synthetic Rubber Co., Ltd., trade name: AE-923), synthetic silica (Mizusawa Chemical Industry) Made,
Product name: Mizukasil P-832) 60 parts and pulp powder 40 parts were mixed to adjust the solid content concentration to 20% to obtain a pressure-sensitive adhesive coating liquid. Subsequently, the coating solution was applied on both sides of 70 g / m ² of impregnated paper so that the dry weight was 7 g / m ² , to obtain a pressure-sensitive adhesive sheet as shown in FIG. (Postcard for creating continuous sheet) 130 g / m ² of postcard coated paper (multicolor foam mat paper, Kanzaki made paper) recorded on the front and back surfaces of the print, a continuous sheet such as a postcard of Figure 12 with the perforation forming Got

(Preparation and Evaluation of Removable Postcard) The postcard continuous sheet 1 was folded in two at perforations 2, and the pressure-sensitive adhesive sheet 5 was sandwiched between the sheets, and then the postcard was introduced into a pressure sealing device. And pressure-bonding at a pressure of 300 kg / cm ² , followed by cutting to obtain a removable postcard 8 shown in the plan view of FIG. 17 and the sectional view of FIG. The obtained postcard was peeled off as shown in the cross-sectional views of FIGS. 19 and 20, and information could be confirmed, and the peeling at that time was extremely stable.

[0025]

The removable information sheet of the present invention uses a pressure-sensitive adhesive sheet whose adhesive layer exhibits substantial adhesiveness only under high pressure. Since it does not require a release paper, it is inexpensive. Moreover, the removability information sheet is practical because the releasability is extremely stable.

[Brief description of drawings]

FIG. 1 is a plan view showing a postcard continuous sheet 1 obtained by recording and printing information and the like on an opaque sheet.

FIG. 2 is a sectional view taken along line AA of the postcard continuous sheet 1 of FIG.

FIG. 3 is a plan view showing a pressure-sensitive adhesive sheet 5 in which an opaque support is provided on both sides with an adhesive layer showing adhesiveness only under high pressure.

4 is a cross-sectional view of the pressure-sensitive adhesive sheet 5 of FIG. 3 taken along the line BB.

5 is a cross-sectional view of the postcard continuous sheet 1 of FIG. 1 folded in two at a central perforation 2 so that the surface is on the inside, and the pressure-sensitive adhesive sheet 5 of FIG. 3 is sandwiched between the sheets. It is a top view which shows the sheet 7 obtained by pressure-bonding by.

FIG. 6 is a plan view showing an example of the removable postcard of the present invention obtained by cutting the pressure-bonding sheet of FIG.

7 is a sectional view taken along line CC of the removable postcard of FIG.

8 is a plan view showing a state after peeling of the removable postcard of FIG. 6;

FIG. 9 is DD of the removable postcard after peeling of FIG.
It is sectional drawing in a line.

10 is also a plan view showing the state of the removable postcard of FIG. 6 after peeling.

11 is a cross-sectional view taken along line EE of the removable removable postcard of FIG.

FIG. 12 is a plan view showing a postcard continuous sheet 1 obtained by recording and printing information and the like on an opaque sheet.

FIG. 13 is an F of the continuous sheet 1 for postcards shown in FIG.
It is sectional drawing in the -F line.

FIG. 14 is a plan view showing a pressure-sensitive adhesive sheet 5 in which an opaque support is provided on both sides with an adhesive layer showing adhesiveness only under high pressure.

15 is a graph of G of the pressure-sensitive adhesive sheet 5 of FIG.
It is sectional drawing in the -G line.

16 is a cross-sectional view of the postcard continuous sheet 1 of FIG. 12 folded in two with the perforations 2 inside, and the pressure-sensitive adhesive sheet 5 of FIG. 14 is sandwiched between the sheets and pressed. It is a top view which shows the sheet 7 obtained by joining.

FIG. 17 is a plan view showing an example of the removable postcard of the present invention obtained by cutting the pressure-bonding sheet of FIG.

FIG. 18 is a cross-sectional view taken along line HH of the removable postcard of FIG.

FIG. 19 is a cross-sectional view showing a state after peeling of the removable postcard of FIG. 17.

20 is also a cross-sectional view showing a state after peeling of the removable postcard of FIG.

[Explanation of symbols]

 1 …… Continuous sheet for postcards 2 …… Perforations 3 …… Information 4 …… Opaque sheet 5 …… Pressure-sensitive adhesive sheet 6 …… Pressure-sensitive adhesive layer 7 …… Pressure bonding sheet 8 …… Removability Postcard 9 …… Postcard after half peeling 10 …… Postcard after complete peeling

Claims (1)

Claim: What is claimed is: 1. An opaque support is provided with an adhesive layer between two opaque sheets having information or two folded opaque sheets, the adhesive layers exhibiting adhesiveness only under high pressure. A releasable information sheet obtained by pressure-bonding after sandwiching a pressure-sensitive adhesive sheet.