JP2000280657A - Press bonding recording sheet and laminating recording sheet using the press bonding recording sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a curl of a sheet even by printing with a non-impact printer, to suppress static electricity and to stabilize the fixing of an ink or toner by providing a pressure sensitive adhesive layer on one surface of a support and an antistatic layer containing an antistatic agent on its opposite surface. SOLUTION: A pressure sensitive adhesive layer normally exhibiting no pressure sensitive adhesive and no adhesive and exhibiting releasable adhesiveness by pressing, a support and an antistatic layer containing an antistatic agent are sequentially laminated. Then, the agent contained in the antistatic layer is a pH of 8 or above, and nonionic or amphoteric. The press bonding recording sheet is recorded on one side or both side surfaces by a non-impact type, molded and pressed with the pressure sensitive adhesive layer disposed at its inside, and applied to a postcard. Further, as the support, paper is suitable in view of its economy and characteristics. The antistatic layer is provided on a surface having no pressure sensitive adhesive layer of the support, thereby preventing a curl.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive recording sheet which can be recorded by a non-impact printer and can provide a stable adhesive force.
Here, the pressure-bonded recording paper refers to a recording paper having a pressure-sensitive adhesive layer that exhibits adhesiveness under pressure without exhibiting both adhesiveness and adhesiveness in a normal state and that can be peeled off after pressure-bonding.

[0002]

2. Description of the Related Art In recent years, applications of two-fold and three-fold postcards using pressure-sensitive recording paper have been expanding. These pressure-sensitive recording papers are coated with a pressure-sensitive adhesive, which does not exhibit both tackiness and adhesiveness in a normal state and exhibit adhesiveness under pressure, to form a pressure-sensitive adhesive layer. The adhesive layers are bonded by pressure in a state where the adhesive layers face each other, and the bonded state is maintained even when the pressure is removed.
In addition, the bonding state can be made to be peelable after bonding by adjusting the pressure, and it is also possible to bond to a state where peeling is impossible. The contents of the confidential communication of the postcard (password, member number, billing amount, balance of deposit, etc.) can be printed on the peelable pressure-sensitive adhesive surface, pasted by pressure, and then confirmed by the recipient being peeled off.

As a printing method for confidential communication contents, a non-impact printer is mainly used. Here, the non-impact printer is a generic name of printers adopting a printing method (electrophotography, laser printer, etc.) for fixing ink (or toner) with heat energy or light energy after printing.

When a pressure-sensitive recording sheet having a pressure-sensitive adhesive layer on only one side of a support is used as a two-fold postcard,
Since the side on which the confidential communication content is printed and the side on which the recipient address is printed are located on the front and back, a printer that can print twice on a non-impact printer or print on both sides with a single pass ( Hereafter, it is necessary to use a double-sided printing printer). However, when the paper is passed twice, there is a risk that the print position of the recipient address is shifted with respect to the contents of the confidential communication. Therefore, a double-sided printing printer is used in most cases. In addition, the duplex printer is
Since most models can only be used with cut sheets (single-sheet) such as A4, pressure-bonded recording paper used as a two-fold postcard is also cut and processed.
Therefore, since it has a pressure-sensitive adhesive layer on only one side and is used for single-sheet printing, when using a double-sided printer, the applied heat causes the paper to curl, causing paper jams in the printer. There was a problem that trouble easily occurred.

Heretofore, as a measure for preventing curling of a two-fold postcard, a method of adjusting by giving a large amount of moisture to the opposite surface of the pressure-sensitive adhesive layer during manufacturing, or a direction opposite to the direction of curling in cut sheet processing. The method of adjusting by applying physical force to the object (decurler) has been adopted. However, curling caused by use of a non-impact printer is caused by the fact that almost no water contained in the pressure-bonded paper is lost due to the high temperature of about 200 ° C. applied inside the printer. At present, the preventive measures had little effect. In addition, the loss of water makes it easy to generate unnecessary static electricity. In particular, in a printer that performs printing by an electrostatic method, ink or toner stains occur due to a disorder in print control, and the static electricity causes a problem. Therefore, there is a problem that a paper transport accident occurs in the printer.

Further, in the case of pressure-bonded paper, it is necessary to perform pressure bonding processing after printing by a two-sided printing printer. Therefore, even if printer printing is possible, curling and static electricity generated by paper passing through the printer cause problems. As a result, the workability of the pressure-sensitive adhesive processing machine (hereinafter referred to as a pressure-sealing sealer) is significantly deteriorated, and the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is thermally degraded due to the paper passing through the printer. However, there is a serious problem that the adhesive strength is reduced.

On the other hand, when a pressure-sensitive recording sheet having a pressure-sensitive adhesive layer on both sides of a support is used as a three-fold postcard, the confidential communication content and the face on which the address of the recipient is printed are the same. In order to print only once with an impact printer, it is often used in the form of continuous form paper. In addition, since it has a similar layer structure on both sides of the support, it is possible to use paper produced by heat applied when using a non-impact printer. Can be used with almost no concern about curl generation. However, a user who has already used a double-sided printing printer often cannot use a single-sheet size for use as a three-fold printer with a two-sided printing printer, and needs to purchase a new printer for three-fold printing. In addition, since the print position of the confidential communication content and the address of the recipient changes, an enormous amount of labor is required to rewrite the output control program to the printer. Further, according to the postal rules, the area available for communication and the like is the same between the two-fold and the three-fold, so that in the case of the three-fold, unnecessary paper area that cannot be used for communication must be used together. In addition, there is a problem that the production cost increases because the pressure-sensitive adhesive layer is present on both sides.

[0008]

Accordingly, an object to be solved by the present invention is to provide a pressure-sensitive adhesive layer on one side of a support and an antistatic layer containing an antistatic agent on the other side of the support. Even when printing with an impact printer, especially a duplex printer, there is no paper curl,
The purpose of the present invention is to provide a pressure-sensitive recording paper capable of stably fixing ink or toner by suppressing generated static electricity.Also, since no curling or static electricity is generated even in a pressure-bonding process using a pressure-sealer, It is an object of the present invention to provide a pressure-sensitive recording sheet that can provide stable paper-passing workability and maintain stable adhesive strength.

[0009]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above problems, and as a result, have reached the following invention.

That is, a pressure-sensitive adhesive layer which does not exhibit both tackiness and adhesiveness in a normal state and which can be peeled off by pressing under pressure, a support, and an antistatic layer containing an antistatic agent are provided in this order. It is an invention of a pressure-sensitive recording paper characterized by the following.

[0011] The present invention also provides a pressure-sensitive recording paper, wherein the antistatic agent contained in the antistatic layer has a pH of 8 or more.

The present invention also provides a pressure-sensitive recording paper, wherein the antistatic agent contained in the antistatic layer is nonionic or amphoteric.

The present invention also provides a pressure-sensitive recording paper characterized in that the antistatic agent contained in the antistatic layer is nonionic or amphoteric and has a pH of 8 or more.

Further, the present invention provides a laminated recording paper, characterized in that one or both sides of the pressure-sensitive recording paper are recorded by a non-impact method, and folded and pressure-bonded with the pressure-sensitive adhesive layer inside.

[0015] Further, the invention is a laminated recording paper, wherein the laminated recording paper is a postcard.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The support used in the present invention is formed of a synthetic resin film such as paper, polyethylene, polypropylene, polyethylene terephthalate, polyamide, polyvinyl chloride, polyvinylidene chloride, polymethylpentene, and synthetic fibers thereof. Non-woven fabric, synthetic paper, or laminated paper obtained by laminating these synthetic resins on one or both sides of paper, metal foil, or bonded product of metal foil and paper, vapor-deposited paper, opaque paper subjected to hologram treatment, synthetic resin It is possible to use a product bonded to a film, mica paper, glass paper, or the like, but paper is suitably used economically and characteristically. The paper used in the present invention is mainly composed of wood pulp and pigment.
As wood pulp, chemical pulp such as LBKP, NBKP, GP, PGW, RMP, TMP, CTMP, CM
Including mechanical pulp such as P and CGP, waste paper pulp such as DIP and pulp such as synthetic pulp, if necessary, conventionally known pigments and binders and sizing agents and fixing agents, retention agents, cationizing agents, paper strength enhancement Agents, dyes and other additives are mixed using one or more, and a support can be manufactured with various apparatuses such as a fourdrinier paper machine, a circular net paper machine, and a twin wire paper machine. Can be made alkaline.
In addition, general paper such as high-quality paper, art paper, coated paper, cast paper, glassine paper and the like can also be used as the support.

The support may be processed on-machine or off-machine using a calender comprising a metal roll and a synthetic resin roll. After the treatment, the support is further calendered by a machine calender, a super calender or the like. May control the flatness.

The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer according to the present invention does not exhibit tackiness or adhesiveness in a normal state, but can be adhered by strong pressure, and is used for labels and adhesive tapes. It is different from conventional tacky pressure sensitive adhesives. The pressure-sensitive adhesive and the pressure-sensitive adhesive layer referred to in the present invention do not show tackiness or adhesiveness in the former normal state, but are limited to those which can be bonded by strong pressure.

Further, the pressure-sensitive recording paper of the present invention can be adhered by superposing the pressure-sensitive adhesive layers and applying pressure, and by controlling the adhesiveness of the pressure-sensitive adhesive layer or controlling the applied pressure. It is also possible to make the film peelably adhered after bonding, or to strongly bond it so that it cannot be peeled after bonding.

The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer according to the present invention is required to have a property of being self-adhesive and having no tackiness on the surface. As a base polymer of the adhesive, natural rubber or a modified product thereof (hereinafter, both are collectively referred to as (modified) natural rubber), (poly) isoprene rubber,
Synthetic rubbers such as butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, butyl rubber, chloroprene rubber, acrylic rubber, chlorosulfonated polyethylene, chlorinated polyethylene, epichlorohydrin rubber, and ethylene-vinyl acetate copolymer resin , (Meth) acrylate resin, vinyl chloride resin, vinylidene chloride resin, or copolymer of synthetic rubber and (meth) acrylate, and (modified) natural rubber and (meth) acrylic acid A copolymerized copolymer such as an ester is used in the form of a solution or an emulsion.

In addition, the pressure-sensitive adhesive of the present invention comprises a rosin-based resin and its derivative, a terpene-based resin, a coumaroindene-based resin, a xylene-based resin, an alkylphenol-based resin, a petroleum resin, etc. as a tackifier. They can be used together as long as the blocking property and heat resistance are not impaired. Further, silica, kaolin, clay, calcium carbonate, aluminum hydroxide, titanium oxide, zinc oxide, melamine resin particles, benzoguanamine resin particles, starch particles and the like can be used in combination for the purpose of controlling the adhesiveness.

In the pressure-sensitive recording paper of the present invention, a release agent may be contained in the pressure-sensitive adhesive layer for controlling the adhesive force. As the release agent, for example, various paraffins, waxes, fatty acids or derivatives thereof, higher alcohols, metal soaps, silicone resins, and the like can be used as long as they do not hinder the minimum required adhesiveness as pressure-sensitive recording paper. . The minimum required adhesiveness required as pressure-sensitive recording paper means that the recording paper can be bonded by pressure using a pressure-sealer and has an adhesive force that does not peel off naturally over time.

Further, a thermoplastic resin may be used in combination for the purpose of controlling adhesiveness. Examples thereof include styrene, olefin, ester, urethane, isoprene, 1,2-butadiene and 1,2-butadiene. Thermoplastic elastomers such as vinyl chloride, amide, ionomer, etc., polyethylene resin, vinyl chloride resin, polypropylene resin, styrene resin, ABS resin, PVA resin, acrylic resin, acrylonitrile-styrene resin, vinylidene chloride resin, AAS Resin, ABS resin, cellulose derivative, thermoplastic polyurethane, polyvinyl butyral resin, poly-4-methylpentene-1 resin, polybutene-
1 resin, etc., and can be used as a pressure-sensitive recording paper within a range that does not hinder the minimum necessary adhesiveness.

In general, when a sheet is prepared in which some layer is provided on only one side of the support, a curl in which the support is turned over on either side is generated. The same applies to a pressure-sensitive recording sheet having a pressure-sensitive adhesive layer provided on only one side of the support, and curls are generated in which the pressure-sensitive adhesive layer is turned upward. The reason why such curling occurs is that after the pressure-sensitive adhesive layer is provided on the support in a state where the pressure-sensitive adhesive layer is contained, when the composition is cured and stabilized, the moisture or the solvent evaporates. The adhesive layer expands and contracts on the support, or at that time, evaporates moisture or the like contained in the support itself, and thus expands and contracts. As a result, it is considered that curling occurs due to a difference in expansion and contraction ratio between the support and the pressure-sensitive adhesive layer. Until now, in order to suppress or prevent such a phenomenon, after providing a pressure-sensitive adhesive layer on one surface of the support, water is applied to the other surface of the support, or water vapor is applied. It has been common to adopt a method of adjusting the expansion and contraction rate of the support by giving moisture to the support. However, since the pressure-sensitive recording paper is subjected to printing by a non-impact printer that heats the ink and toner at a high temperature to fix it, the paper loses moisture during printing, and the difference in expansion and contraction between the support and the pressure-sensitive adhesive layer is lost again. Has occurred and has little effect.

In the present invention, it has been found that curling is suppressed and suppressed by providing an antistatic layer containing an antistatic agent on the surface of the support on which the pressure-sensitive adhesive layer is not provided. Even if heat is applied to the pressure-sensitive recording paper, the antistatic agent often has high moisture retention or water retention due to its chemical structure, and by providing a clear layer configuration of an antistatic layer on the support, Compared to the case where only moisture is provided to the support, the moisture contained in the support is less likely to evaporate.In addition, the pressure-sensitive adhesive layer on one side of the support and the presence of the antistatic layer on the other side support the support. Expansion and contraction of the body is suppressed, and almost no curling occurs. Furthermore, the pressure-sensitive recording paper of the present invention,
Due to the presence of the antistatic layer, the generation of static electricity is suppressed even during non-impact printer paper passing, and paper handling is improved in printer paper passing processing and subsequent pressure bonding processing,
It has been found that the work efficiency can be significantly improved. In the pressure-sensitive recording paper of the present invention, the presence of the antistatic layer makes it possible to significantly improve the printing quality of a non-impact printer using an electrostatic method. Furthermore, the pressure-sensitive recording paper of the present invention has little decrease in adhesive force even after passing through a non-impact printer, for the reason considered to be due to improvement in moisture retention or water retention due to the presence of the antistatic layer, and It has been found that the adhesive force hardly decreases even with the passage of time in a normal state.

As the antistatic agent contained in the antistatic layer provided on the pressure-sensitive recording paper of the present invention, those which are generally commercially available as antistatic agents can be used. The antistatic agent is classified into an inorganic type using a metal itself or an organic type chemically synthesized. In the present invention, among them, those which can be used for coating are preferably used. Specific examples include siloxane-based antistatic agents and organic surfactant-based antistatic agents.
Organic surfactant-based antistatic agents are classified into cationic, anionic, nonionic, and amphoteric according to their chemical structures. As a cationic antistatic agent, a quaternary ammonium salt type, as an anionic antistatic agent, a sulfonate type, a sulfate ester type, a phosphate ester type, etc., and as a nonionic antistatic agent, Examples of amphoteric antistatic agents such as ether-based, ether-ester-based, ester-based, and nitrogen-containing antistatic agents include betaine-based antistatic agents, each of which is synthesized in a form added to an appropriate organic structure. The specific examples are based on typical classifications, and the antistatic agent usable in the present invention is not limited thereto.

In the pressure-sensitive recording paper of the present invention, (modified) natural rubber may be used as an emulsion as a base polymer of the pressure-sensitive adhesive. (Modified) The adhesive force of natural rubber is determined by causing the pressure-sensitive adhesive layers to face each other and press-contact with each other by the self-diffusion force of the molecules caused by the elastic modulus peculiar to the natural rubber molecules. Since it is manifested by intertwining in a complicated manner, tackifiers and the like are not required in most cases as a pressure-sensitive adhesive, and there is an advantage that the feeling of stickiness is reduced. By the way, (denaturation)
As a general property of a natural rubber emulsion, there is a property of stabilizing at a pH of 8 or more. However, the present inventors have proposed that even when a (modified) natural rubber is coated as a pressure-sensitive adhesive layer on a support, When the pH is less than 8, it has been found that the self-diffusion force of (modified) natural rubber molecules is suppressed, which may affect the adhesive force. The pressure-sensitive recording paper of the present invention is characterized in that an antistatic layer is provided on the surface of the support opposite to the surface on which the pressure-sensitive adhesive layer is provided, so that the roll state after production and single-sheet processing or continuous slip processing are performed. In many cases, the pressure-sensitive adhesive layer and the antistatic layer are in close contact with each other, such as when they are stacked. Therefore, in the pressure-sensitive recording paper of the present invention, the antistatic agent contained in the antistatic layer has a pH of 8 or more so as to maintain a stable adhesive force without hindering the self-diffusion force of (modified) natural rubber molecules. Is preferred.

It is generally known that the emulsion of a (modified) natural rubber cannot be stabilized even by the presence of a metal salt, and for the same reason as the above-mentioned pH, the antistatic property used in the pressure-sensitive recording paper of the present invention is not limited. The agent is preferably nonionic or amphoteric, and more preferably has a pH of 8 or more and is nonionic or amphoteric.

One or more known pigments can be used for the support, pressure-sensitive adhesive layer and antistatic layer used in the pressure-sensitive recording paper of the present invention. For example, light calcium carbonate, heavy calcium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate, synthetic non-crystalline Crystalline silica, colloidal silica, colloidal alumina,
Pseudo boehmite, aluminum hydroxide, alumina, lithopone, zeolite, hydrohaloysite, magnesium carbonate, white inorganic pigments such as magnesium hydroxide, styrene plastic pigment, acrylic plastic pigment, polyethylene, microcapsules, urea resin, melamine resin, benzoguanamine And organic pigments, and the like, and if necessary, used together with a suitable binder.

Examples of the binder include starches, cellulose derivatives such as hydroxyethylcellulose, methylcellulose, ethylcellulose and carboxymethylcellulose; proteins such as casein and gelatin; aqueous natural polymer compounds such as saccharose such as oxidized starch and ester compound starch; and polyvinyl alcohol. , Modified polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acid, sodium polyacrylate, acrylamide / acrylate copolymer, acrylamide / acrylate / methacrylic acid terpolymer, styrene / maleic anhydride copolymer Water-soluble synthetic polymer compounds and latexes such as alkali salts of polymers, latex, polyacrylamide, styrene / maleic anhydride copolymer, ethylene / anhydride Maleic acid copolymer water-soluble adhesive resins such as alkali salts, more, polyvinyl acetate, polyurethane, polyacrylic acid ester, styrene / butadiene copolymers, acrylonitrile / butadiene copolymer,
Latexes such as methyl acrylate / butadiene copolymer, acrylonitrile / butadiene / acrylic acid copolymer, ethylene / vinyl acetate copolymer and the like can be mentioned.

The pressure-sensitive adhesive layer and the antistatic layer used in the pressure-sensitive recording paper of the present invention include other additives such as a dispersant, a thickener, a flow improver, a defoamer, a foam inhibitor and a foaming agent. ,
Penetrants, coloring dyes, coloring pigments, fluorescent brighteners, ultraviolet absorbers, antioxidants, preservatives, anti-binders, waterproofing agents, wet paper strength agents, dry paper strength agents, anti-aging agents, etc. Can be appropriately blended. In addition, an antistatic agent can be appropriately added to the pressure-sensitive adhesive layer in order to have the same electrical characteristics as the antistatic layer. The antistatic agent used for the pressure-sensitive adhesive layer may be different from the antistatic agent used for the antistatic layer.

The method for providing a pressure-sensitive adhesive layer and an antistatic layer on a support according to the present invention includes, for example, various gravure coaters, various blade coaters, roll coaters, air knife coaters, bar coaters, rod blade coaters, kiss coaters, Various apparatuses such as a comma coater, an AKKU coater, a smoothing coater, a short dwell coater, a dip coater, a drop curtain coater, a slide coater, a die coater, a melt extrusion die, and a size press can be used on-machine or off-machine.

The order in which the pressure-sensitive adhesive layer and the antistatic layer are provided on the support according to the present invention may be such that both layers are provided simultaneously or separately, but the present invention is not particularly limited. It is determined by the characteristics of the pressure-sensitive adhesive or antistatic agent used in consideration of the prevention of paper curl.

The weight of the pressure-sensitive adhesive layer is examined by an adhesive method used for the purpose of ensuring good adhesiveness.
It is preferably in the range of ^{1~60g / m 2, 2~40g / m} 2
Is more preferably within the range. If the weight of the pressure-sensitive adhesive layer is smaller than this range, bonding will be weak due to insufficient adhesiveness, and if it is larger than this range, it will not only hinder the running of paper but also increase the cost economically. Become.

The weight of the antistatic layer is 0.01 to 2 g / m
It is preferably within the range of ² . If the weight of the antistatic layer is less than 0.01 g / m ² , the effect of curling prevention cannot be obtained, and if it exceeds ² g / m ² , not only the effect of curling prevention is adversely effected, but also a cost increase factor. Becomes

Further, the pressure-sensitive recording paper of the present invention can be subjected to a calendering treatment for the purpose of improving printing or printing quality. Known means can be used for the calendering treatment, and the treatment may be performed on either the pressure-sensitive adhesive layer or the antistatic layer.

The method for printing and recording on the pressure-sensitive recording paper of the present invention is not limited to a non-impact printer using an electrophotographic system, but may include writing with a pencil or ink, a dot impact printer, thermal transfer, ink jet, laser printing, and the like. It can be used without limitation, and can be used without limitation, such as flexographic printing, offset printing, gravure printing, letterpress printing, and intaglio printing. Furthermore, a method such as label attachment can be used.

In the pressure-sensitive recording paper of the present invention, a notch or a compression line may be formed in a portion corresponding to a fold to facilitate folding. In addition, the obtained pressure-sensitive recording paper can be integrated by folding one pressure-sensitive recording paper or by integrating two pressure-sensitive recording papers. The pressure-bonding of the pressure-sensitive recording layer can be performed by applying pressure to the superposed pressure-sensitive adhesive layers.

The laminated recording paper of the present invention is obtained by overlapping and compressing the pressure-sensitive recording paper of the present invention in two layers so that the pressure-sensitive adhesive layers overlap. It is also possible to use a pressure-sensitive recording paper as a postcard having a concealing property.
A method in which two releasable pressure-sensitive recording papers are folded in a “<” shape and then pressed to cover the entire printed portion (2)
Any method may be used, such as a folding postcard), or a method of folding only the part of the print information by folding it into an “L” shape.

The pressure-sensitive recording paper using the laminated recording paper of the present invention has complete non-disclosure of information, and peels off two pressure-sensitive recording papers using the peelable adhesiveness of a pressure-sensitive adhesive. Since the internal recording can be read, and the pressure-bonded recording paper once peeled does not adhere again, the confidentiality of the information is high.

[0041]

EXAMPLES The present invention will be described below with reference to examples of the present invention, but the present invention is not limited to these examples. Further, “parts” and “%” shown in the examples represent dry parts by weight and% by weight, unless otherwise specified.

Example 1-Pressure-sensitive adhesive-Methyl methacrylate (modified) natural rubber (manufactured by Resitex) 100 parts Synthetic silica (manufactured by Mizusawa Chemical Industries) 50 parts Wheat starch (manufactured by Glico) 50 parts Water 400 parts- Antistatic agent-Cationic antistatic agent (Electro-stretch QN manufactured by Kao; quaternary ammonium salt) 1 part Water 300 parts The pressure-sensitive adhesive prepared by the above formulation has a pH of 9.4, and the antistatic agent is pH was 7.0. Further, when the antistatic agent was added to the pressure-sensitive adhesive, the pressure-sensitive adhesive immediately began to aggregate, so that in the subsequent work, care was taken so that the pressure-sensitive adhesive did not come into contact with the antistatic agent. First, a dry coating amount of 5 g / on one side of a support (a fine paper having a basis weight of 127.9 g / m ² ).
m ² was applied with an air knife coater and dried, and then the other side was coated with 0.5 g /
The antistatic agent was applied by a roll coater and dried so as to obtain m ² , thereby obtaining the target pressure-sensitive recording paper.

Example 2 -Antistatic Agent- Anionic Antistatic Agent 1 part (Semichemical Kasei Industries Chemistat SA-9; sulfonic acid salt type) Water 500 parts The pressure-sensitive adhesive is exactly the same as in Example 1. It was adjusted to pH 9.4 by mixing, and the antistatic agent prepared by the above mixing had pH 6.8. Further, when the antistatic agent was added to the pressure-sensitive adhesive, the pressure-sensitive adhesive immediately began to aggregate, so that in the subsequent work, care was taken so that the pressure-sensitive adhesive did not come into contact with the antistatic agent. First, a support (basis weight 127.
9 g / m ² of high quality paper) is coated with a pressure-sensitive adhesive with an air knife coater so as to have a dry coating amount of 5 g / m ^2, and then dried. An antistatic agent was applied by a blade coater and dried so as to obtain m ² , thereby obtaining a target pressure-sensitive recording paper.

Example 3 -Antistatic Agent- Nonionic Antistatic Agent (Residstat SA220, manufactured by Daiichi Kogyo Seiyaku; ether type) 1 part Water 500 parts The pressure-sensitive adhesive had exactly the same formulation as in Example 1. The mixture was adjusted to pH 9.4, and the antistatic agent prepared by the above blending had pH 7.2. Further, when the antistatic agent was added to the pressure-sensitive adhesive, the viscosity of the pressure-sensitive adhesive increased immediately after the addition, but after several hours, mixing was possible without any problem. Support (high quality paper of 127.9 g / m ² basis weight)
Antistatic pressure sensitive adhesive to a dry coating amount 5 g / m ² on one surface after coated and dried by the air knife coater, to give a dry coating weight 0.05 g / m ² on the opposite surface The agent was applied and dried by a roll coater to obtain a target pressure-sensitive recording paper.

Example 4 -Antistatic Agent- Nonionic Antistatic Agent (Chemistat, manufactured by Sanyo Chemical Industries; ether type) 5 parts Water 500 parts The pressure-sensitive adhesive was prepared in exactly the same formulation as in Example 1. As a result, the pH became 9.4, and the antistatic agent prepared by the above blending had a pH of 8.0. Further, when an antistatic agent was added to the pressure-sensitive adhesive, a slight increase in viscosity was observed, but mixing was possible without any particular problem. After coated and dried by a support (basis weight 127.9 g / m ² fine paper) one surface dry coating amount 5 g / m ² and so as to pressure-sensitive adhesive air knife coater, dried on the opposite surface Coating amount 0.4
An antistatic agent was applied by a roll coater and dried so as to obtain g / m ² to obtain a target pressure-sensitive recording paper.

Example 5-Antistatic Agent-Nonionic Antistatic Agent (Chemistat 2500 manufactured by Sanyo Chemical Industries; ether type) 2 parts Water 100 parts A pressure-sensitive adhesive was prepared in exactly the same formulation as in Example 1. Was carried out to pH 9.4, and the antistatic agent prepared by the above blending had pH 9.5. When an antistatic agent was added to the pressure-sensitive adhesive, mixing was possible without any particular problem. After coated and dried by a support (basis weight 127.9 g / m ² fine paper) one surface dry coating amount 5 g / m ² and so as to pressure-sensitive adhesive air knife coater, dried on the opposite surface An antistatic agent was applied by a roll coater and dried so as to have a coating amount of 0.5 g / m ² to obtain a target pressure-sensitive recording paper.

Example 6 According to Example 5, the pressure-sensitive adhesive of Example 1 was mixed with Example 4
It was found that the addition of the antistatic agent was acceptable, so the pressure-sensitive adhesive and the antistatic agent were prepared with the following composition. -Pressure-sensitive adhesive-Methyl methacrylate (modified) natural rubber (manufactured by Resitex) 100 parts Synthetic silica (manufactured by Mizusawa Chemical Industries) 50 parts Wheat starch (manufactured by Glico) 50 parts Nonionic antistatic agent (Sanyo Chemical Industries, Ltd.) Chemistat 2500; ether type) 1 part Water 400 parts -Antistatic agent- Nonionic antistatic agent (Sanyo Chemical Industries Chemistat 2500; ether type) 2 parts Water 100 parts Support (basis weight 127.9 g / m ²⁾ Pressure-sensitive adhesive is applied to one side of a high-quality paper with an air knife coater so as to have a dry coating amount of 7 g / m ^2, and then dried, and then the dry coating amount is 1.0 g / m ^{2 on the} other side. The antistatic agent was applied by a roll coater and dried as described above to obtain the target pressure-sensitive recording paper.

Example 7 -Antistatic Agent- Zwitterionic Antistatic Agent (Electro-stretch-AC, manufactured by Kao; Hetaine-based) 5 parts Water 250 parts The pressure-sensitive adhesive was prepared in exactly the same formulation as in Example 1. As a result, the pH became 9.4, and the antistatic agent prepared by the above blending had a pH of 7.0. When the antistatic agent was added to the pressure-sensitive adhesive, the viscosity of the pressure-sensitive adhesive immediately increased, but after several hours, mixing was possible without any problem. After coated and dried by a support (basis weight 127.9 g / m ² fine paper) air knife coater a pressure-sensitive adhesive to a dry coating amount 6 g / m ² on one surface of the dried on the opposite surface The antistatic agent was applied by a roll coater and dried so as to have a coating amount of 1.5 g / m ² to obtain a target pressure-sensitive recording paper.

Comparative Example 1 Using the pressure-sensitive adhesive of Example 1, a support (basis weight: 127.
9 g / m ² of high-quality paper) was coated with a pressure-sensitive adhesive by an air knife coater so as to have a dry coating amount of 5 g / m ² and dried to obtain a sample of Comparative Example 1.

Comparative Example 2 Water (weight before drying) was 2.0 g / m 2 on the surface of the sample obtained in the same manner as in Comparative Example 1 opposite to the surface coated with the pressure-sensitive adhesive. ² by coating and dried by a roll coater so as to obtain a sample of Comparative example 2.

Comparative Example 3 Using the pressure-sensitive adhesive of Example 1, a support (basis weight: 127.
9 g / m ² of high-quality paper), apply a pressure-sensitive adhesive to one side of the support with an air knife coater so as to have a dry coating amount of 5 g / m ^2, and then apply the same pressure-sensitive adhesive to the opposite surface of the support. Was dried with an air knife coater so that the dry coating amount was 2 g / m ² , to obtain a sample of Comparative Example 3.

Compression recording paper of Examples 1 to 7 and Comparative Example 1
Table 1 summarizes the manufacturing conditions of the samples Nos. 1 to 3.

[0053]

[Table 1]

The pressure-sensitive recording sheets of Examples 1 to 7 and the samples of Comparative Examples 1 to 3 were obtained in a wound state. When the pressure-sensitive adhesive layer is provided on both surfaces, the surface on which the pressure-sensitive adhesive is applied is treated as the surface. Were evaluated by going through steps of facing each other and performing pressure bonding and bonding to a postcard.

-Printing- Evaluation was performed by printing with an offset rotary press. For printing, two colors were printed on both surfaces of the pressure-sensitive recording paper of Examples 1 to 7 and the samples of Comparative Examples 1 to 3, respectively. Printing machine: TAIYO TOF400 4-color machine made by Taiyo Kikai Water supply method: Continuous water supply, H liquid is Dynaphant Alpha 1
Use 100 times liquid Print pattern: 130% 30% halftone dot printing on the whole surface Ink: T & K Best Cure Indigo, red (UV curing type) UV lamp: Metal halide type Use 6 kW per color for a total of 4 prints Speed: 120m / min

Evaluation method [Printability] After printing, the print quality and ink fixability were evaluated.
As compared with ordinary high-quality foam paper, a case where no inferiority was found at all was rated as “A”, a case where it was slightly inferior, and a case where it was considerably inferior.

-Non-impact printer printing-Printed pressure-sensitive recording sheets of Examples 1 to 7 and Comparative Examples 1 to
Sample No. 3 was subjected to single-sheet processing in an A4 size (297 mm × 210 mm) with the flow direction of the support being long, and printing was performed on both sides by a non-impact printer. Non-impact printers are duplex printers (XE
ROX 4660) was used, and the number of prints was continuously 5,000.

Evaluation method [Printer paper-passing property] The number of stoppages due to double feeding of the pressure-sensitive recording paper during printing was recorded. When the frequency of the stoppage was too high, the printing was stopped because it was impossible to pass the paper even if the number of sheets was less than 5000 sheets.

Evaluation method [Printability of printer] The printing conditions of the pressure-sensitive recording paper and the sample after printing were compared. When no dirt was adhered, it was evaluated as ○. , And the case where the dirt was so severe that it could not be used was evaluated as x. Evaluation method [Printer fixing property] The toner fixing property of the printed pressure-sensitive recording paper was evaluated. Immediately after the film adhesive tape was attached to the printed portion, the film was peeled off, and it was checked whether the toner was transferred to the adhesive tape. X: When the toner is completely transferred to the adhesive tape and the toner characters remaining on the pressure-sensitive recording paper are difficult to read. X: When the toner is transferred to the adhesive tape but the toner characters remaining on the pressure-sensitive recording paper are readable. Was evaluated as △, and the case where no toner was transferred to the adhesive tape was evaluated as ○.

Evaluation Method [Curl] Curl was measured by a double-sided printing printer before and after printing. The measurement method is J.TAPPI No.15
The maximum depth (mm) when the surface was placed on the upper side was measured according to.

-Crimping Process- The printed recording paper of Examples 1 to 7 and the samples of Comparative Examples 1 to 3 on which printing and printing have been performed are postcard-sized (10.5 cm × 14.9 cm) so that the surfaces thereof face each other. Two (V-shaped)
It was crimped on the fold to obtain a laminated recording paper. The crimping process is a crimping sealer with folding machine (EX PRESS SEALER made by Japan ADM)
4000). In addition, the pressure bonding conditions were determined using an adjustment scale attached to the sealer so that the adhesive force immediately after the pressure bonding was about 100 gf / 25 mm that gives a reasonable peel feeling.

Evaluation method [Crimping workability] The number of times the machine was stopped due to double feed during the crimping process was recorded. If the frequency of the stoppage was too high, the crimping operation was stopped because it was impossible to pass the crimped paper even if the number of sheets was less than 5,000.

Evaluation method [Adhesion properties] Pressure-bonded recording paper of Examples 1 to 7 and Comparative Example 1
The influence of printing can be known by subjecting samples No. to No. 3 to pressure bonding before and after printing under the same conditions, and measuring and comparing the adhesive strength of each sample. The measurement of the adhesive force was performed by cutting into a strip having a width of 25 mm after the pressure bonding, and measuring the 180-degree peel strength with a Tensilon universal tensile tester. If the difference in adhesive strength before and after printing is too large, the printer model, lot,
Since there is a high possibility that the adhesive strength greatly changes depending on the printing area, the smaller the adhesive strength difference before and after printing, the better. [Change over time in adhesive strength] Further, Example 1 after printing and printing
7 were irradiated with ultraviolet rays for 100 hours using a xenon arc fade ometer (manufactured by Toyo Seiki Seisaku-Sho, Ltd.) (after printing and printing).
Then, pressure bonding was performed under the same conditions as when irradiation was not performed, and the adhesive strength was measured.

A test was conducted by the above method, and the evaluation results are shown in Table 2.

[0065]

[Table 2]

Evaluation results: The pressure-sensitive recording paper obtained in the examples was provided with a pressure-sensitive adhesive layer on one side of the support and an antistatic layer on the other side, so that a non-impact printer, especially a duplex printing printer Even when printing using, the paper does not curl, so it does not stop during paper passing through the printer, and even in the press processing after printing, excellent work without stopping I was able to get the sex. In addition, since no static electricity was generated other than curling, stable toner fixation could be obtained in printing, and the printing quality was excellent. Furthermore, due to the chemical action of the antistatic layer, it is possible to suppress the change in the adhesive force, and there is almost no decrease in the adhesive force even after printing, after printing and with the lapse of time. No problem was found. From the above, it was suitable for use as a confidential laminated recording paper.

On the other hand, in the sample of the comparative example, it was not possible to achieve both the paper-passing workability in printing or pressure-bonding processing and stable adhesive force suitability. In particular, when the back surface has no layer structure or only water is applied, a large curl occurs in a non-impact printer printing or a press processing, and a double feed or a paper jam occurs during the printing. For this reason, it was necessary to frequently stop, and the workability became extremely poor. In addition, even when a layer other than the antistatic layer is provided on the back surface, although curl generation during printing and pressure-bonding processing could be suppressed, a decrease in the adhesive force after printing and over time became large, and the confidential lamination recording was performed. Uneasiness remains unsuitable for postcard use as paper.

[0068]

The pressure-sensitive recording paper of the present invention is provided with a pressure-sensitive adhesive layer on one side of the support and an antistatic layer on the other side, so that printing can be performed using a non-impact printer, especially a double-sided printer. Even if you go, there is no paper curl,
Excellent workability. Further, by suppressing generated static electricity, stable fixing of ink or toner is possible. In addition, since no curling or static electricity is generated even in the pressure bonding process, stable paper passing workability can be obtained. Furthermore, the antistatic layer makes the water content of the paper stable, and can maintain a stable adhesive force even after printing or printing and during normal aging. As described above, the present invention can be used in many applications such as continuous slips, sticking slips, labels, recording, and dust-free recording paper, in addition to postcards, as confidential bonded recording paper. Is of great significance.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C005 WA03 4F100 AA20 AJ03 AK25 AL05 AL06 AN01 AT00B BA03 BA07 BA10B CA22C CA22H CA22K CA23 DG10 EH46 GB71 JG03C JL01 JL13 JL13A JL14 JL14A

Claims (5)

[Claims] 1. A pressure-sensitive adhesive layer which exhibits neither adhesiveness nor adhesiveness in a normal state and exhibits adhesiveness which can be peeled off under pressure.
A pressure-sensitive recording paper comprising a support and an antistatic layer containing an antistatic agent in this order. 2. The pressure-sensitive recording paper according to claim 1, wherein the antistatic agent contained in the antistatic layer has a pH of 8 or more. 3. The antistatic agent contained in the antistatic layer is nonionic or amphoteric.
Or the pressure-sensitive recording paper according to 2. 4. A bonding method, wherein the pressure-sensitive recording paper according to claim 1 is recorded on one or both sides by a non-impact method, and folded and pressure-bonded with the pressure-sensitive adhesive layer inside. Recording sheet. 5. A laminated recording sheet according to claim 4, wherein the laminated recording sheet is a postcard.