JPH04208497A - Manufacture of re-releasable pressure-sensitive adhesive postcard - Google Patents

Abstract

PURPOSE:To efficiently obtain a re-releasable pressure-sensitive adhesive postcard increased in the quantity of secret data by a method wherein a pressure- sensitive adhesive sheet formed by providing an adhesive layer to the single surface of a support is folded double so that the adhesive layers of the folded parts are opposed each other and other pressure-sensitive adhesive sheet is laminated to at least one surface of the sheet to be bonded thereto under pressure. CONSTITUTION:A pressure-sensitive adhesive sheet 1 for a postcard formed by providing an adhesive layer to the rear of a support is folded double along the folding perforation 3 formed to the central part of the sheet 1 and a pressure-sensitive adhesive sheet 7 for a label is superposed on the single surface having data entered therein of the sheet 1 so that the adhesive layer thereof is turned downwardly. Then, both sheets are introduced into a pressure sheet apparatus using a marginal and partially pressed at first to be temporarily bonded and, subsequently, the marginal 4 and the perforation 3 are cut and the sheets are further pressed to obtain a re-releasable pressure-sensitive adhesive postcard.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for efficiently producing removable pressure-sensitive adhesive postcards containing a large amount of confidential information.

``Prior Art'' Demand for confidential postcards, which hide personal information by pasting an adhesive label on the area where the information is printed, is increasing due to the advantage of allowing confidential information to be mailed for the price of a postcard.

Several types of such postcards are already on the market, but none of them are satisfactory in terms of performance or cost.

For example, in the case of the label described in Japanese Utility Model Application Publication No. 63-6870, peeling occurs from a non-adhesive resin layer other than the adhesive layer that is the bonding surface, and once the label is removed from the postcard, it cannot be easily reattached. However, because the adhesive label used has a multilayer structure, many steps are required to manufacture it, and the manufacturing cost is extremely high. Therefore, the cost benefit from the lower postage charges is small.

The present inventors previously filed Japanese Patent Application No. 1-270849,
No. 339995 discloses that a pressure-sensitive adhesive sheet and a non-adhesive sheet having a specific T-type peeling force can be bonded by applying heavy pressure, and information on the bonded surface can be read again by peeling the bonded surface. It has been revealed that a removable postcard that can be removable is superior to the postcard of Utility Model Application Publication No. 63-6870 in terms of production cost.

However, as a result of detailed study, it was found that this type of postcard also has points that require further improvement. for example,
In order to increase the amount of confidential information on a postcard, if a concealing label is attached to the entire surface of one side of the postcard, a postcard with the address and name recorded on the front side and personal data that needs to be concealed on the back side is usually used. However, in order to efficiently obtain such postcards using a line printer, it is necessary to record on a sheet having the size of two postcards, fold it in half, join it together, and make a postcard.

However, since the postcards obtained by processing in this way are single-leaf postcards, the processing speed of the next step of attaching a concealing label made of a pressure-sensitive adhesive sheet is not as fast as when processing a continuous sheet. has.

"Problem that the invention attempts to solve" The purpose of the present invention is to provide a removable feeling with a large amount of confidential information.

An object of the present invention is to provide a method for efficiently manufacturing pressure-adhesive postcards.

"Means for Solving the Problem" As a result of study, the inventors of the present invention found that by using a pressure-sensitive adhesive sheet as the postcard paper and a pressure-sensitive adhesive sheet as the concealment level sheet, the entire process can be achieved in one step. The present invention was completed by discovering that the bonding process can be performed at high speed.

In the present invention, a pressure-sensitive adhesive sheet having an adhesive layer provided on one side of a support is folded in half so that the adhesive layers face each other,
The method for producing a removable pressure-sensitive adhesive postcard is further characterized in that another pressure-sensitive adhesive sheet is laminated on at least one side of the sheet and bonded under pressure.

"action" The present invention will be specifically explained with reference to the drawings.

As an example showing the manufacturing method of the present invention, FIGS.
Examples include those shown in the figure. FIG. 1 is a plan view showing a pressure-sensitive adhesive sheet 1 for postcards, in which base printing and perforations 2 are formed on the pressure-sensitive adhesive sheet provided with an adhesive layer on the back side of the support.
．． After processing 3 and marginal 4, personal information 5 and addressee name 6 are printed on the front side using a line printer or the like.

FIG. 2 is a plan view showing the pressure-sensitive adhesive sheet 7 for labels.
It is obtained by subjecting a pressure-sensitive adhesive sheet comprising an adhesive layer on a support to a base or tint pattern printing, perforations and margins 4, and punching 8 as shown in the figure.

In the present invention, after folding the pressure-sensitive adhesive sheet 1 for postcards shown in FIG. Lay the pressure-sensitive adhesive sheet 7 on the adhesive layer facing downward (Figure 3), guide it into a general-purpose pressure seal using the marginal hole, and cut the marginal and perforation lines. After that, a pressure treatment is performed to form a removable pressure-sensitive adhesive postcard 9 having a plan view as shown in FIG. The postcard is shown in Figure 4 as A-
The cross section taken along line A is shown in FIG. 5. FIGS. 6 to 8 show another example of the present invention. FIG. 6 is a plan view showing the pressure-sensitive adhesive sheet 7 for labels, which differs from the sheet shown in FIG. 2 in that it is not punched. Using this pressure-sensitive adhesive sheet 7 for labels, fold the pressure-sensitive adhesive sheet 1 for postcards in half in the same way as described above, overlap them, and pressurize them with a pressure sealing device, resulting in a flat surface as shown in Figure 7. The removable pressure-sensitive adhesive postcard 9 shown in the figure is formed. Incidentally, when the postcard is cut along the line BB shown in FIG. 7, the cross section is as shown in FIG. 8.

9 to 11 show still another example of the present invention. FIG. 9 is a plan view showing a pressure-sensitive adhesive sheet for labels, which differs from the pressure-sensitive adhesive sheet for labels shown in FIG. 2 in that the width of the sheet is narrow and there is a marginal 4 on only one side. Using this pressure-sensitive adhesive sheet 7 for labels, fold the pressure-sensitive adhesive sheet 1 for postcards in half in the same manner as described above, overlap them, and pressurize them with a pressure sealing device, resulting in a plan view as shown in FIG. 10. A removable pressure-sensitive adhesive postcard 9 is formed.

Incidentally, FIG. 11 shows a cross section of the postcard taken along the line CC shown in FIG. 10.

The pressure-sensitive adhesive sheet used in the present invention is usually formed by providing an adhesive layer on a support, and the adhesive includes:
For example, ethylene-vinyl acetate resin, acrylic resin,
Examples include vinyl chloride resins, vinylidene chloride resins, synthetic rubber resins, and natural rubber resins, among which those with a glass transition point of 1100 to 0°C are preferred.

Pigments are usually added to the adhesive layer to improve blocking resistance, such as silica, kaolin, clay, calcium carbonate, aluminum hydroxide, zinc oxide,
Examples include titanium oxide, melamine resin particles, benzoguanamine resin particles, and starch particles. Incidentally, the pigment is usually used in an amount of 10 to 500% by weight based on the adhesive.

In addition, the adhesive layer may further contain water-soluble materials such as casein, agar, gum arabic, sodium alginate, starch, oxidized starch, esterified starch, carboxymethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol, polyvinylpyrrolidone, and polyacrylic acid. Adhesion of polymers, latex such as styrene-butadiene latex, acrylonitrile-butadiene latex, rosin resin and its derivatives, terpene resin, coumaron indene resin, xylene resin, alkylphenol resin, Cs to C9 petroleum resin, etc. Imparting agents, various paraffin waxes, fatty acids and their derivatives, high alkaline earth metal soaps, release side of silicones, etc., adhesive-containing capsules and oil capsules to improve adhesion, antistatic agents, binders, dispersion. Auxiliary agents such as additives, preservatives, antioxidants, and antifoaming agents may be added.

The coating liquid used to form the adhesive may be either aqueous or organic solvent-based, but usually an aqueous coating liquid containing emulsion as the adhesive is used.

The adhesive layer is prepared by coating a coating solution containing the above components using an air knife coater, blade coater, bar coater, etc., or by a printing method such as screen printing, flexo printing, etc. so that the dry weight is usually 2 to 20 g/m''. It is formed by coating on a support.

Among the adhesive layers provided in this way, when the surfaces of the adhesive layers are stacked facing each other and bonded by applying a pressure of 1 kg/cs+", it is 10g/25s+n as measured based on JIS K 6833-1980. It exhibits the following T-peel force, and the surface of the adhesive layer is stacked facing each other for 300k
50g/25 when joined with g/c ■2 pressure
Those set to exhibit a T-peel force of 1 mm or more are particularly preferable because they provide an extremely good balance between adhesiveness and peelability when forming the removable pressure-sensitive i-postcard of the present invention.

Examples of the support used for forming the pressure-sensitive adhesive sheet for labels include wood-free paper, synthetic paper, impregnated paper, laminated paper, metal-deposited paper, etc. Among them, impregnated paper, laminated paper, metal-deposited paper, etc. Paper is particularly preferred since it has excellent peeling stability and grave covering properties.

On the other hand, supports used for forming pressure-sensitive adhesive sheets for postcards include, for example, wood-free paper, synthetic paper, impregnated paper, laminated paper, metallized paper, coated paper for printing (slightly coated paper, coated paper, etc.). , art paper, cast paper, etc.), coated recording paper (thermal recording paper, pressure-sensitive copying paper, electrostatic recording paper, thermal transfer receiver paper, Inzai paper, inkjet recording paper, etc.), among others:
Coated papers such as coated paper for printing and coated paper for recording have excellent peeling stability and are particularly preferred.

Note that the paper-making method used for these is not particularly limited, and recycled pulp from used paper may be included.

The pressure-sensitive adhesive sheet for labels used in the present invention is prepared by appropriately selecting the above-mentioned pressure-sensitive adhesive sheet with base or tint pattern printing by letterpress printing, offset printing, flexo printing, etc., perforations, margins, punching, etc. After applying
Z-folded or rolled. However, winding is preferable since there is no fear of blocking.

On the other hand, pressure-sensitive adhesive sheets for postcards are produced by subjecting the above-mentioned pressure-sensitive adhesive sheets to base printing by letterpress printing, offset printing, flexo printing, etc., as well as perforations and margins, etc., and then folding them in half. Alternatively, it is rolled up and applied to a recording device such as a line printer. However, Z-folding is more preferable for handling.

The thus obtained pressure-sensitive adhesive sheet for postcards is folded in half so that the adhesive layers face each other, and then the pressure-sensitive adhesive sheet for labels is placed on one non-adhesive side of the sheet, with the adhesive layer facing down. They are stacked one on top of the other and guided into the pressurized sealing device using the marginal hole for processing.

The pressure sealing device may be of any type as long as it guides the sheet through a marginal hole and has a pressure processing function, and usually performs processing such as slitting, cutting, folding, and pressing the sheet. A machine with suitable parts that can be used is used.

Pressure treatment is usually performed using a pressure roll for 50 to 1000k.
It is carried out under a pressure of g/c-2. At that time, it is more preferable to use a heating device because the adhesive force will be stabilized if the sheet is heated to 30 to 60°C in advance.

As the recording apparatus used in the present invention, apparatuses such as wet or dry electrophotography, thermal transfer method, thermal recording method, electrostatic recording method, electrolytic recording method, impact method, inkjet method, silver salt photography, etc. are suitable. used.

〔Example〕

Examples of the present invention will be described below, but it goes without saying that the present invention is not limited only to these examples. In the examples, unless otherwise specified, "part" means part by weight, and "%" means weight %.

Example 1 (Preparation of pressure-sensitive adhesive sheet for labels) Acrylic acid ester emulsion (manufactured by Japan Synthetic Rubber Co., Ltd., trade name: AE-923) was used as an adhesive.
(dry weight), 100 parts of synthetic silica (manufactured by Mizusawa Chemical Industry Co., Ltd., trade name: Mizukasil P-832) as feed,
A coating solution prepared by mixing 80 parts of starch particles and adjusting the solid content concentration to 30% was applied to one side of 70 g/m" impregnated paper with a dry weight of 8.
g/m” to obtain a pressure-sensitive adhesive sheet.Next, after printing a background pattern such as a background pattern on the front and back sides of this sheet, perforations and margins were added, and the sheet was further cut out using a punching machine. A portion was pulled out to obtain a roll-up of a pressure-sensitive adhesive sheet for labels (a roll-up of the sheet shown in Figure 2).

(Preparation of pressure-sensitive adhesive sheet for postcards) A pressure-sensitive adhesive sheet was obtained by applying the same coating liquid as above to one side of 100 g/m'' high-quality paper so that the dry weight was 8 g/m''. . Next, after base printing on the back side of this sheet, perforations and margins are added, personal information such as address, name, data, etc. is written on an electrophotographic line printer, and the pressure-sensitive adhesive sheet for postcards is folded in half. (The sheet shown in FIG. 1 was Z-folded with two postcards as one unit).

(Creation of a removable pressure-sensitive adhesive postcard) After folding the above-mentioned pressure-sensitive adhesive sheet for postcards in half at the folding perforation 3 in the center, write the above-mentioned label stamp on one side where the data of the sheet is written. The pressure-adhesive sheets are overlapped as shown in Figure 3 with the adhesive layer facing down, and both sheets are introduced into the pressure sealing device using the marginal. Glued, then cut the marginal and perforated lines, and then added 300 kg
A removable pressure-sensitive adhesive postcard as shown in the plan view of FIG. 4 was obtained by applying a pressure of 7 cm+''.

The removable pressure-sensitive adhesive postcard label thus obtained exhibited extremely stable removability.

Example 2 (Preparation of pressure-sensitive adhesive sheet for postcards) A coating liquid prepared in the same manner as in Example 1 was applied at 100 g/m
A pressure-sensitive adhesive sheet was obtained by coating one side of Z high-quality paper so that the dry weight was 6 g/m'. Next, after base printing on the front and back sides of this sheet, perforations and margins are added, and then personal information such as address, name, data, etc. is written on an electrophotographic line printer, and the Z of the pressure-sensitive adhesive sheet for postcards is printed. A fold was obtained (the sheet shown in FIG. 1 was folded into two with two postcards as one unit).

(Creation of a removable pressure-sensitive adhesive postcard) After folding the above-mentioned pressure-sensitive adhesive sheet for postcards in half at the folding perforation 3 in the center, write the above-mentioned label stamp on one side where the data of the sheet is written. After introducing the pressure-adhesive sheets into the pressure sealing device using the margins while overlapping them as shown in Figure 3 with the adhesive WIN facing downward, first cut the margins and perforations, and then add 300 kg. A removable pressure-sensitive adhesive postcard as shown in the plan view of FIG. 4 was obtained by applying a pressure of /cgz.

The resulting removable pressure-sensitive adhesive postcard label showed extremely stable removability, and the postcard itself, which was pasted together, could be peeled off again to see the information on the adhesive layer. done.

〔effect〕

The removable pressure-sensitive adhesive postcard obtained by the method of the present invention had good manufacturing efficiency and contained more information than conventional postcards of this type, making it very convenient.

[Brief explanation of the drawing]

1 to 5 are diagrams showing an example of the present invention. FIG. 1 is a plan view showing a pressure-sensitive adhesive sheet for postcards, and FIG. 2 is a plan view showing a pressure-sensitive adhesive sheet for labels. FIG. 3 shows a state in which the pressure-sensitive adhesive sheet for postcards shown in FIG. 1 is folded at the perforation 3, and the pressure-sensitive adhesive sheet for labels shown in FIG. 2 is further superimposed thereon. FIG. 4 is a plan view showing a removable pressure-sensitive adhesive postcard obtained by the present invention, and FIG. 5 is a cross-sectional view of the postcard in FIG. 4 taken along line A-A. 6 to 8 are diagrams showing another example of the present invention, in which FIG. 6 is a plan view showing a pressure-sensitive adhesive sheet for labels, and FIGS. 7 and 8 are views showing the obtained removability. FIG. 2 is a plan view and a cross-sectional view illustrating a pressure-adhesive postcard. FIG. 9 to FIG. 11 are diagrams showing still another example, and FIG.
The figure is a plan view showing a pressure-sensitive adhesive sheet for labels, and FIGS. 10 and 11 are a plan view and a cross-sectional view illustrating the obtained removable pressure-sensitive adhesive postcard. (1) Pressure-sensitive adhesive sheet for postcards (2) Perforations (3) Perforations for folding (4) Marginal holes (5) Personal information (6) Addressee (7) Pressure-sensitive adhesive sheet for labels (8) Punched window (9) Removable pressure-sensitive adhesive postcard (10) Postcard (11) Label (12) Adhesive layer (13) Support

Claims (1)

[Claims] (1) A pressure-sensitive adhesive sheet with an adhesive layer provided on one side of a support is folded in half so that the adhesive layers face each other, and another pressure-sensitive adhesive sheet is placed on at least one side of the sheet. A method for producing a removable pressure-sensitive adhesive postcard, which is obtained by laminating and bonding under pressure.