JPH0939378A - Paper for contact recording and manufacture of folded paper for contact recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a paper for contact recording with good fixing of an ink and excellent water resistance by incorporating a quarternary ammonium group- contg. cationic compd. with a specified wt.% of the solid wt. of a pressure- sensitive adhesive layer in the pressure-sensitive adhesive layer. SOLUTION: After wooden pulp, a pigment, an alkyl ketone dimer, a cationic acrylamide, a cationized starch, barium sulfate are adjusted, a base paper is made by using a long wet paper manufactuirng machine. A pressure-sensitive adhesive consisting of an acrylate emulsion, a synthetic non-crystalline silica, a starch particle, polymethylbenzylammonium chloride and water is applied to the base paper by means of an air knife and it is dried to obtain a paper for contact recording in which a quarternary ammonium group-contg. cationic compd. with 1-50wt.% of the solid wt. of a pressure-sensitive adhesive layer is incorporated in the pressure-sensitive adhesive layer. It is possible thereby to make fixing and water resistance of the ink excellent in ink jet recording.

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 paper capable of inkjet recording. Here, the pressure-sensitive recording paper is a recording paper having a pressure-sensitive adhesive layer that exhibits neither adhesiveness nor adhesiveness in a normal state, exhibits adhesiveness under pressure, and can be peeled off after pressure-adhesion.

[0002]

2. Description of the Related Art In recent years, applications of two-fold and three-fold postcards using pressure-bonded paper have been expanding. These pressure-sensitive adhesive papers are formed by applying a pressure-sensitive adhesive coating liquid, which does not exhibit tackiness or adhesiveness under normal conditions but exhibits adhesiveness under pressure, to form a pressure-sensitive adhesive layer, and then folding the paper The pressure-bonding layers are made to adhere to each other by pressure while facing each other, and the adhesion at the time of pressurization can be peelable after the adhesion,
It is also possible to bond them until they cannot be peeled off. The contents of confidential communication (postal code number, membership number, billing amount, deposit balance, etc.) on postcards can be printed on the peelable pressure-sensitive adhesive surface, pasted by pressure, and then the recipient can confirm the contents.

Since such a pressure-sensitive adhesive sheet is printed on the pressure-sensitive adhesive layer, is stuck to another pressure-sensitive adhesive layer by pressure, and is peeled off again to confirm the content, the printed content is There is a problem of so-called show-through and ink transfer, which is transfer to the pressure-sensitive adhesive layer on the opposite side. In order to avoid such a show-through phenomenon, a printing method (electrophotography, laser printer, etc.) in which ink (or toner) is fixed by heat after printing has been adopted.

However, such a heat fixing method gives excessive heat to the printing surface (pressure-sensitive adhesive surface) and the paper itself,
Since the moisture is taken away, the pressure-sensitive adhesive surface dries and the pressure-bonding property deteriorates. Again, excessive heating causes some of the adhesive components that make up the pressure-sensitive adhesive surface to thermally decompose, generating an offensive odor There was a problem of deteriorating the environment.

The ink jet recording system is a system in which minute droplets of ink are ejected and adhered to a recording sheet such as paper by various operating principles to record images, characters, etc. It has features such as easy colorization, great flexibility in recording patterns, and no need for development-fixing.
As a recording device for various figures including Kanji and color images, it is rapidly spreading in various applications. further,
An image formed by a multicolor ink jet system can obtain a recording comparable to that of multicolor printing by a plate making system. In addition, in applications requiring a small number of copies, it is being widely applied to the full-color image recording field because it is inexpensive.

As the recording sheet used in this ink jet recording system, efforts have been made from the viewpoint of the apparatus and the ink composition in order to use high-quality paper or coated paper used for ordinary printing and writing. However, with the improvement of the performance of ink jet recording apparatuses such as high-speed, high-definition and full-color apparatuses, and expansion of applications, more advanced characteristics are also required for recording sheets. That is, as the recording sheet, the density of the print dots is high and the color tone is bright and vivid, the ink does not flow out or bleed even when the print dots are overlapped quickly, and the horizontal direction of the print dots Is required to be high in image reproducibility, such as that the diffusion is not unnecessarily large and the periphery is smooth and does not blur. Further, since the ink is water-soluble, there is a problem that the print becomes bleeding and becomes unreadable when it gets wet with water after printing.

[0007]

SUMMARY OF THE INVENTION Therefore, the problem to be solved by the present invention is to avoid deterioration of the pressure-sensitive adhesive surface in the printing step or its fixing step in the printing method of pressure-bonded recording paper and to generate unnecessary malodor. It is an object of the present invention to provide a method for producing a folded pressure-sensitive recording paper capable of preventing the above-mentioned problem, and to provide a pressure-sensitive recording paper having good ink fixability and excellent water resistance.

[0008]

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 having neither pressure-sensitive adhesiveness nor adhesiveness in a normal state but exhibiting adhesiveness under pressure is provided on at least one surface of the support, and adhesion under pressure can be peeled off after adhesion. In the recording paper, the pressure-sensitive adhesive layer contains a cationic compound having a quaternary ammonium group in an amount of 1 to 50% by weight based on the solid content of the pressure-sensitive adhesive layer. .

Further, a pressure-sensitive adhesive layer having neither pressure-sensitive adhesiveness nor adhesiveness in a normal state but exhibiting adhesiveness under pressure is provided on at least one surface of the support, and adhesion under pressure can be peeled off after adhesion. In the recording paper, the pressure-sensitive adhesive layer contains a compound having a tertiary amino group in an amount of 1 to 1 of the solid content weight of the pressure-sensitive adhesive layer.
The invention of the pressure-sensitive recording paper is characterized by containing 40% by weight.

A pressure-sensitive adhesive layer containing a cationic compound having a quaternary ammonium group or a compound having a tertiary amino group is provided on at least one surface of the support, and neither tackiness nor adhesiveness is exhibited in a normal state. Adhesion at the time of pressurization, the adhesion at the time of pressurization is peelable after the adhesion is recorded by the inkjet method on the pressure-sensitive adhesive layer of the pressure-sensitive recording paper,
It is an invention of a method for producing a folding pressure-sensitive recording paper, which comprises folding and pressure-bonding the ink-jet-recorded pressure-sensitive adhesive inside.

Further, a cationic compound having a quaternary ammonium group or a third compound on at least one surface of the support.
A pressure-sensitive adhesive recording that has a pressure-sensitive adhesive layer containing a compound having a primary amino group, shows neither adhesiveness nor adhesiveness under normal conditions, but exhibits adhesiveness under pressure and can be peeled off after adhesion. After recording on the pressure-sensitive adhesive layer of the paper by an inkjet method, the recording surface is dried by high frequency heating,
After that, the invention is an invention of a method for producing a folded pressure-bonded recording paper, which is characterized in that the ink-jet recorded pressure-sensitive adhesive is folded inside and pressure-bonded.

A base paper, a synthetic resin film, or the like can be used for the support of the present invention, and the base paper is preferably used both economically and characteristically.

The base paper used in the present invention is mainly composed of wood pulp and pigment. As wood pulp,
Chemical pulp such as LBKP and NBKP, GP, PGW,
Including mechanical pulp such as RMP, TMP, CTMP, CMP, CGP, pulp such as waste paper pulp such as DIP,
If necessary, various additives such as conventionally known pigments and binders, sizing agents, fixing agents, retention aids, cationizing agents, and paper strength enhancers are mixed and used to prepare a Fourdrinier paper machine and cylinder. The support can be produced by various devices such as a paper machine and a twin wire paper machine, and can be made by acid, neutral and alkaline papermaking.

The base paper may be subjected to on-machine processing by using a calendering device composed of a metal roll and a synthetic resin roll. At that time, off-machine processing may be performed, and after processing, flatness may be controlled by further performing calendar processing using a machine calendar, a super calendar, or the like.

When a pressure-sensitive adhesive layer having ink receptivity is provided, the coating amount is not particularly limited, but if the amount is too small, the ink absorbability is good as in the case of a non-coat type ink jet recording sheet, but an image is obtained. The density, color, and vividness are low, and the ink is diffused in the surface direction of the support to cause the deterioration of the dot shape called feathering, which is jagged like bird feathers. Also, if the coating amount is too large, the drying load in the drying step after coating or impregnation increases,
Not only the productivity decreases due to the decrease in coating or impregnation speed, but also the binder in the coating composition that constitutes the pressure-sensitive adhesive layer is dried on the surface of the pressure-sensitive adhesive layer together with the solvent that evaporates when the load is high. In order to move and reduce the amount of voids on the surface, scumming may occur during recording. The problem that occurs in a pressure-sensitive adhesive layer having a large coating amount is influenced by the concentration of the coating composition and the ability of the drying process, but is preferably 1 to 10 g / m ² .

One or more known white pigments can be used in the base paper and pressure-sensitive adhesive layer used in 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,
White inorganic pigments such as magnesium silicate, synthetic amorphous silica, colloidal silica, colloidal alumina, pseudo-boehmite, aluminum hydroxide, alumina, lithopone, zeolite, hydrohaloysite, magnesium carbonate, magnesium hydroxide, styrene plastic pigment, acrylic Examples include organic pigments such as plastic pigments, polyethylene, microcapsules, urea resins, and melamine resins.

Among the above, as the white pigment contained as a main component in the ink-receptive pressure-sensitive adhesive layer, a porous inorganic pigment is preferable, and porous synthetic amorphous silica, porous magnesium carbonate, and porousness are used. Examples thereof include alumina, and porous synthetic amorphous silica having a large pore volume is particularly preferable.

The ink referred to in the present invention is a recording liquid which is particularly used in an ink jet recording system and which comprises the following coloring agent, liquid medium and other additives.

Examples of the colorant include direct dyes, acid dyes, basic dyes, reactive dyes and water-soluble dyes such as food dyes.

As the solvent for the ink, water and various water-soluble organic solvents such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol and isobutyl are used. Alkyl alcohols having 1 to 4 carbon atoms such as alcohols; amides such as dimethylformamide and dimethylacetamide; ketones or ketone alcohols such as acetone and diacetone alcohol; ethers such as tetrahydrofuran and dioxane; polyethylene glycol, polypropylene glycol, etc. Polyalkylene glycols; ethylene glycol, propylene glycol, butylene glycol, triethylene glycol, 1,2,6-hexanetriol, thiodiglycol Le, hexylene glycol,
Alkylene glycols having 2 to 6 alkylene groups such as diethylene glycol; and lower alkyl ethers of polyhydric alcohols such as glycerin, ethylene glycol methyl ether, diethylene glycol methyl (or ethyl) ether, and triethylene glycol monomethyl ether. Among these many water-soluble organic solvents, polyhydric alcohols such as diethylene glycol, and lower alkyl ethers of polyhydric alcohols such as triethylene glycol monomethyl ether and triethylene glycol monoethyl ether are preferable. Other additives include, for example, a pH adjusting agent, a sequestering agent, an antifungal agent, a viscosity adjusting agent, a surface tension adjusting agent, a wetting agent, a surfactant, and a rust preventive agent.

The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer used in the present invention does not exhibit adhesiveness or adhesiveness in a normal state, but it can be adhered by a strong pressure, and can be attached to a label or an adhesive tape. It is different from the normally tacky pressure sensitive adhesives used. The pressure-sensitive adhesive and the pressure-sensitive adhesive layer in the present invention are limited to those which can be adhered by a strong pressure although they do not exhibit tackiness or adhesiveness in the former normal state. The pressure-sensitive adhesive layers can be bonded by overlapping them and applying pressure.By controlling the adhesiveness of the pressure-sensitive adhesive layers or adjusting the applied pressure, it is possible to make them peelable after bonding, or after bonding. It is also possible to make strong adhesion so that it cannot be peeled off. In general tri-fold postcards, the surface that adheres releasably to confirm the print content and the surface that does not provide the print content and that strongly adheres non-separably make use of this difference in pressure-sensitive adhesiveness. is there.

Examples of the adhesive base polymer used in the pressure-sensitive adhesive of the present invention include natural rubber, modified natural rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber and other synthetic rubber, ethylene-vinyl acetate copolymer resin, Acrylic ester resins, vinyl chloride resins, vinylidene chloride resins, etc. are used in the form of solutions or emulsions, and silica, kaolin, clay, calcium carbonate, aluminum hydroxide, titanium oxide, for the purpose of controlling the adhesiveness, Zinc oxide, melamine resin particles, benzoguanamine resin particles, starch particles and the like can be used in combination. Further, the pressure-sensitive adhesive of the present invention, as a tackifier, rosin-based resins and derivatives thereof, terpene-based resins, coumaroindene-based resins, xylene-based resins, alkylphenol-based resins, petroleum resins, etc. adhesion, blocking resistance, It can be used in combination as long as heat resistance is not impaired. Further, it is also possible to use a release agent in combination for the purpose of controlling the releasability, for example, does not impair the adhesiveness of various paraffins, waxes, fatty acids or derivatives thereof, higher alcohols, metal soaps, silicone resins and the like. Can be used in a range.

The pressure-sensitive adhesive layer of the present invention may further contain, as other additives, dispersants, thickeners, flow improvers, defoamers, foam inhibitors, release agents, foaming agents, and penetrants. , Coloring dyes, coloring pigments, fluorescent whitening agents, ultraviolet absorbers, antioxidants, preservatives, anti-binders, water-proofing agents, wet paper strength agents, dry paper strength agents, antistatic agents, anti-aging agents And the like can be appropriately compounded.

In the pressure-sensitive adhesive layer of the present invention, a cationic compound having a quaternary ammonium group is contained as an essential component in an amount of 1 to 50% by weight of the solid content of the pressure-sensitive adhesive layer, or the third compound.
A compound having a primary amino group is contained in an amount of 1 to 40% by weight based on the solid content of the pressure-sensitive adhesive layer. By adding these essential components to the pressure-sensitive adhesive layer of the present invention, when the recording surface is wet with water after ink-jet recording on the pressure-sensitive adhesive surface of the present invention, the ink-jet recorded content does not flow into water and prints. It has been found that a phenomenon of no bleeding (conferring water resistance) occurs. Further, surprisingly, in the pressure-sensitive adhesive recording paper of the present invention, the fixability of the ink after ink-jet recording to the pressure-sensitive adhesive layer is improved. Even if peeled after pressure-bonding, transfer of the ink to the opposite side, so-called show-through It was found that the recording was suppressed and the entire surface of the pressure-bonded surface was readable.

The fourth essential component of the pressure-sensitive adhesive layer of the present invention is
The cationic compound having a quaternary ammonium group is 1 to 50% by weight of the solid content of the pressure-sensitive adhesive layer, or the compound having a tertiary amino group is 1% by weight of the solid content of the pressure-sensitive adhesive layer.
-40% by weight, but when these components are contained only in a ratio lower than this range, it imparts water resistance to the ink jet recording as described above, pressurization,
The effect of suppressing show-through after peeling is not sufficient, and even if it is contained in a ratio exceeding this range, the effect of imparting water resistance to ink jet recording and the effect of suppressing set-off of ink have reached saturation, so it is even better. Not only that, but also the pressure-sensitive adhesive layer, which is the most important function of the pressure-sensitive adhesive layer, may be deteriorated, which is not preferable.

Examples of the cationic compound having a quaternary ammonium group used in the present invention include vinylbenzyltrimethylammonium chloride, vinylbenzyltrimethylammonium bromide, piperidinium chloride, styrene acrylic acid triethyl ammonium chloride, and styrene triethyl methacrylate. Ammonium chloride, styrene acrylic acid trimethyl ammonium chloride, styrene methacrylic acid trimethyl ammonium chloride, styrene ethyl methacrylate trimethyl ammonium chloride, styrene acrylic acid ethyl trimethyl ammonium chloride, styrene ethyl triethyl ammonium chloride, styrene acrylic acid ethyl triethyl ammonium chloride, tetra Chill chloride, compounds such as tetraethylammonium bromide, monomers, oligomers, etc. derivatives containing quaternary ammonium groups which are derived from polymers or their compounds can be used.

Examples of the compound having a tertiary amino group used in the present invention include vinylbenzyldimethylamine, vinylbenzyldiethylamine, styreneacrylic acid diethylamine, styrenemethacrylic acid diethylamine, styreneacrylic acid dimethylamine, and styrenemethacrylic acid dimethylamine. , Styrene ethyl dimethyl methacrylate, styrene ethyl dimethyl amine, styrene ethyl diethyl amine, styrene ethyl diethyl amine, triethyl amine and other compounds, monomers, oligomers, polymers or tertiary amino groups derived from these compounds Derivatives and the like containing can be used.

In the pressure-sensitive recording paper of the present invention, there is no problem in forming a cut portion or a compression line at a portion corresponding to a fold so that it can be easily folded. In addition, the obtained pressure-bonded recording paper can be folded and integrated into a single recording paper.
It is also possible to superimpose two recording sheets and integrate them. Double-sided pressure bonding with a pressure-sensitive adhesive layer on the back side (in the case of distinguishing it from the pressure-sensitive adhesive layer on the front side, it is called a pressure-sensitive adhesive layer because it is stronger than the adhesiveness obtained by the pressure-sensitive adhesive on the surface) For recording paper, use one recording paper
It can also be folded in one or three, and integrated into two.
It is also possible to superimpose more than one recording sheet and integrate them. In order to press-bond the pressure-sensitive recording paper, the pressure-sensitive adhesive can be pressed under a pressure sufficient to bond the pressure-sensitive adhesives.

The releasable pressure-sensitive recording paper of the present invention is obtained by superposing two layers of the pressure-sensitive recording paper of the present invention so that the pressure-sensitive adhesive layers overlap each other and pressure-bonding them. If a double-sided pressure-sensitive recording paper having pressure-sensitive adhesive layers on both sides is used, it is also possible to superimpose the pressure-sensitive recording paper in three layers and integrate them, like a tri-fold postcard. Also when making a peelable postcard using pressure-sensitive adhesive recording paper, two pressure-sensitive adhesive recording papers are superposed and pressure-bonded, or a single removable pressure-sensitive adhesive recording paper is used.
A method of hiding the entire printed area that is folded into a letter-shaped shape and then pressure-bonded (double-folded postcard), or a method of folding it into an "L" shape to conceal only part of the printing information. Any method such as a method of bending in a “Z” shape and crimping (tri-fold postcard) may be used.

A pressure-bonding body using the pressure-bonding recording paper of the present invention is
The confidentiality of the printing information inside is perfect, and the peelable adhesiveness of the pressure-sensitive adhesive can be used to peel off the two-sided pressure-sensitive recording paper to read the internal record, and once peeled off. Since the pressure-sensitive adhesive recording paper is not re-bonded, the confidentiality of information is high.

The coating amount of the pressure-sensitive adhesive layer varies depending on the bonding method, but is preferably in the range of 5 to 40 g / m ^{2 for} the purpose of ensuring good adhesiveness and ink jet recording property. When the coating amount of the adhesive layer is smaller than this range, the adhesion is insufficient and the bonding is weak. If it is larger than this range, it not only hinders the running of the paper but also causes a cost increase economically.

Examples of the method for applying the pressure-sensitive adhesive layer of the present invention include gravure coater, gravure offset coater, bar coater, roll coater, air knife coater, U comma coater, AKKU coater, smoothing coater, micro gravure coater, Any coating method such as a reverse roll coater, a four roll roll coater, a five roll roll coater, a blade coater, a dip coater, a falling curtain coater, a slide coater, a die coater, and a melt extrusion die may be used.

In the recording paper having the pressure-sensitive adhesive layer of the present invention, a penetration preventing layer may be provided in contact with the base paper for the purpose of further preventing the resin forming the pressure-sensitive adhesive layer from penetrating into the base paper. . The role of the permeation preventive layer is to prevent penetration of the resin forming the pressure sensitive adhesive layer into the base paper and to provide smoothness when the pressure sensitive adhesive layer is provided. The permeation preventive layer that can be used in the present invention can be provided by an aqueous solution or emulsion of a water-soluble polymer or hydrophilic polymer, and examples thereof include the following substances.

As natural and semi-synthetic polymers, modified starch compounds such as starch, oxidized starch, etherified starch, dialdehyde starch, esterified starch, alginic acid compounds such as sodium alginate and propylene glycol alginate, casein,
Examples thereof include modified cellulose compounds such as gelatin, pullulan, dextran, chitin, chitosan, gum latex, gum arabic, funori, natural gum, dexidine, methyl cellulose, ethyl cellulose, hydroxy cellulose and carboxymethyl cellulose.

As the synthetic polymer, completely saponified or partially saponified polyvinyl alcohol, acetoacetylated polyvinyl alcohol, esterification product of polyvinyl alcohol and polycarboxylic acid, carboxy modified polyvinyl alcohol, sulfonic acid modified polyvinyl alcohol,
Modified polyvinyl alcohol compounds such as olefin-modified polyvinyl alcohol, nitrile-modified polyvinyl alcohol, amide-modified polyvinyl alcohol, pyrrolidone-modified polyvinyl alcohol, polyethylene glycol, polyacrylic acid amide, polyacrylic acid, ammonium polyacrylate, polyacrylic Examples thereof include polyacrylic acid compounds such as acid soda, polyvinylpyrrolidone, polyethyleneimine, polyvinyl ether, polymaleic acid copolymer, polyacrylamide, and water-soluble alkyd resin.

Although not a water-soluble polymer in a strict sense, synthetic polymers such as styrene / butadiene copolymer, butadiene / methacrylate copolymer, acrylonitrile / butadiene / acrylic acid latex, etc. are dispersed in water. Emulsions can be used instead of aqueous polymer solutions. As the water-soluble polymer, the above polymers may be used alone or in the form of an aqueous solution by mixing them, and if necessary, a defoaming agent, a dispersant, etc. may be used in combination.
The penetration preventing layer can be formed by melt lamination of polyolefin resin or dry lamination as long as it prevents the resin or solvent from penetrating into the support.

[0038]

The pressure-sensitive recording paper of the present invention has good ink fixability in ink jet recording and gives a pressure-sensitive recording paper excellent in water resistance. Therefore, the pressure-sensitive recording paper is printed without overheating during the printing and fixing steps. Therefore, it is possible to avoid deterioration of the pressure-sensitive adhesive surface and prevent generation of unnecessary odor. In the pressure-sensitive adhesive recording paper of the present invention, probably because the fixability of the ink after inkjet recording to the pressure-sensitive adhesive layer is improved, transfer to the opposite surface of the ink, so-called show-through is suppressed even when peeled off after pressure-bonding. It is possible to make the record easy to read over the entire surface.

[0039]

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 are parts by weight and% by weight unless otherwise specified.

<Preliminary operation> The base paper is LBKP (freeness 4
00 ml csf) 70 parts and NBKP (freeness 450 ml)
csf) For 100 parts of wood pulp consisting of 30 parts,
25 parts of pigment having a ratio of light calcium carbonate / heavy calcium carbonate / talc of 30/35/35, 0.10 part of commercial alkyl ketene dimer, 0.03 part of commercial cationic acrylamide, 1.0 part of commercial cationized starch, After preparing 0.5 part of a sulfuric acid band, papermaking was carried out using a Fourdrinier paper machine at a basis weight of 40 g / m ² .

Example 1-A A pressure sensitive adhesive 1A having the following composition was applied to a base paper at a coating amount of 8 g / m ²
Example 1-coating and drying with an air knife
A pressure-sensitive recording paper of A was obtained. <Pressure-sensitive adhesive 1A> Acrylic ester emulsion (manufactured by Japan Synthetic Rubber Co., Ltd., AE-923) Dry weight 60 parts Synthetic amorphous silica (manufactured by Tokuyama Soda, Fanseal X37B) Dry weight 50 parts Starch particles (average) Particle size 20 μm) Dry weight 50 parts Polyvinylbenzyl trimethylammonium chloride Dry weight 40 parts Water 200 parts

Examples 1-B to 1-F Next, a cationic compound having a quaternary ammonium group (polyvinylbenzyl trimethylammonium chloride) of the pressure-sensitive adhesive 1A is used.
Example 1 except that the blending ratio by dry weight of
-Coated in the same manner as A. The respective pressure-sensitive adhesives are blended as pressure-sensitive adhesives 1B to 1F, and the respective pressure-sensitive recording papers are the pressure-sensitive recording papers of Examples 1-B to 1-F. Example 1-B Dry weight 1.6 parts Example 1-C Dry weight 16 parts Example 1-D Dry weight 80 parts Example 1-E Dry weight 120 parts Example 1-F Dry weight 160 parts

Example 2-A The same procedure as in Example 1-A was repeated except that the pressure sensitive adhesive in Example 1A was changed to the pressure sensitive adhesive 2A having the following composition. A pressure-bonded recording sheet was obtained. <Pressure-sensitive adhesive 2A> Acrylic ester emulsion (AE-923, manufactured by Japan Synthetic Rubber Co., Ltd.) Dry weight 60 parts Synthetic amorphous silica (Soda Tokuyama, Fanseal X37B) Dry weight 50 parts Starch particles (average) Particle size 20 μm) Dry weight 50 parts Polystyrene acrylic acid triethylammonium chloride dry weight 40 parts Water 200 parts

Examples 2-B to 2-F Next, a cationic compound having a quaternary ammonium group (polystyrene acrylate triethylammonium chloride) of the pressure-sensitive adhesive 2A is used.
Example 2 by changing the blending ratio by dry weight of
Coating was performed in the same manner as in A. The respective pressure-sensitive adhesives are blended as pressure-sensitive adhesives 2B to 2F, and the respective pressure-sensitive recording papers are the pressure-sensitive recording papers of Examples 2-B to 2-F. Example 2-B 1.6 parts dry weight Example 2-C 16 parts dry weight Example 2-D 80 parts dry weight Example 2-E 120 parts dry weight Example 2-F 160 parts dry weight

Example 3-C The same procedure as in Example 1-A was followed except that the pressure sensitive adhesive in Example 1-A was changed to the pressure sensitive adhesive 3A having the following composition. A pressure-bonded recording sheet was obtained. <Pressure-sensitive adhesive 3A> Acrylic ester emulsion (Japan Synthetic Rubber Co., Ltd., AE-923) Dry weight 60 parts Synthetic amorphous silica (Tokuyama Soda, Fanseal X37B) Dry weight 50 parts Starch particles (average) Particle size 20 μm) Dry weight 50 parts Polystyrene methacrylic acid trimethylammonium chloride Dry weight 40 parts Water 200 parts

Example 3-B to Example 3-F Next, the compounding ratio of the cationic compound having a quaternary ammonium group (polystyrene trimethylammonium chloride chloride) in the pressure-sensitive adhesive 3A in dry weight is as follows. Instead of the above, coating was performed in the same manner as in Example 3A. The pressure-sensitive adhesives 3B to 3F are used in the respective pressure-sensitive adhesives, and the pressure-sensitive adhesive recording papers are the pressure-sensitive adhesive recording papers of Examples 3-B to 3-F. Example 3-B Dry weight 1.6 parts Example 3-C Dry weight 16 parts Example 3-D Dry weight 80 parts Example 3-E Dry weight 120 parts Example 3-F Dry weight 160 parts

Example 4-A The same procedure as in Example 1-A was performed except that the pressure sensitive adhesive in Example 1-A was changed to the pressure sensitive adhesive 4A having the following composition. A pressure-bonded recording sheet was obtained. <Pressure-sensitive adhesive 4A> Natural rubber latex Dry weight 60 parts Synthetic amorphous silica (manufactured by Tokuyama Soda, fan seal X37B) Dry weight 50 parts Calcium carbonate (manufactured by Bihoku Powder Co., Ltd., Softon 1000) Dry weight 50 parts Polystyrene acrylic Diethylamine acid 40 parts dry weight 40 parts water 200 parts

Examples 4-B to 4-E Next, the compounding ratio of the compound having a quaternary amino group (polyethylamine acrylate acrylic acid) in the pressure-sensitive adhesive 4A in dry weight was changed as follows. And applied in the same manner as in Example 4A. The composition of each pressure-sensitive adhesive is pressure-sensitive adhesive 4B-4E,
The respective pressure-sensitive recording papers are used in Examples 4-B to 4-E.
This is the pressure-bonded recording paper. Example 4-B 1.6 parts dry weight Example 4-C 16 parts dry weight Example 4-D 80 parts dry weight Example 4-E 106 parts dry weight

Example 5-A The same operation as in Example 1-A was performed except that the pressure sensitive adhesive in Example 1-A was changed to the pressure sensitive adhesive 5A having the following composition. A pressure-bonded recording sheet was obtained. <Pressure-sensitive adhesive 5A> Natural rubber latex Dry weight 60 parts Synthetic amorphous silica (manufactured by Tokuyama Soda, Fanseal X37B) Dry weight 50 parts Calcium carbonate (Bihoku Koka Kogyo, Softon 1000) Dry weight 50 parts Polystyrene acrylic Acid ethyldiethylamine Dry weight 40 parts Water 200 parts

Examples 5-B to 5-E Next, the compounding ratio of the compound having a quaternary amino group (polyethylamine acrylate acrylic acid) of the pressure-sensitive adhesive 5A in dry weight was changed as follows. And applied in the same manner as in Example 5-A. The composition of each pressure-sensitive adhesive was set to pressure-sensitive adhesives 5B to 5E, and the respective pressure-sensitive recording papers were used in Examples 5-B to 5.
-Use pressure-sensitive recording paper of E. Example 5-B 1.6 parts dry weight Example 5-C 16 parts dry weight Example 5-D 80 parts dry weight Example 5-E 106 parts dry weight

Example 6-A The procedure of Example 6-A was the same as that of Example 1-A, except that the pressure sensitive adhesive was changed to a pressure sensitive adhesive 6A having the following composition. A pressure-bonded recording sheet was obtained. <Pressure-sensitive adhesive 6A> Natural rubber latex Dry weight 60 parts Synthetic amorphous silica (Tokuyama Soda, fan seal X37B) Dry weight 50 parts Calcium carbonate (Bihoku Kogaku Kogyo, Softon 1000) Dry weight 50 parts Polyvinyl benzyl Dimethylamine Dry weight 40 parts Water 200 parts

Examples 6-B to 6-E Next, the compounding ratio of the compound having a quaternary amino group (polyethylamine acrylate acrylic acid) of the pressure sensitive adhesive 6A in dry weight was changed as follows. Coating was carried out as in Example 6-A. The composition of each pressure-sensitive adhesive was set to pressure-sensitive adhesives 6B to 6E, and the respective pressure-sensitive recording papers were used in Examples 6-B to 6.
-Use pressure-sensitive recording paper of E. Example 6-B Dry weight 1.6 parts Example 6-C Dry weight 16 parts Example 6-D Dry weight 80 parts Example 6-E Dry weight 106 parts

Comparative Example 1-G A base paper was coated with a pressure-sensitive adhesive 1G having the following composition at a coating amount of 8 g / m ²
Comparative Example 1-
A G pressure-bonded recording sheet was obtained. <Pressure-sensitive adhesive 1G> Acrylic ester emulsion (Japan Synthetic Rubber Co., Ltd., AE-923) Dry weight 60 parts Synthetic amorphous silica (Made by Tokuyama Soda, Fanseal X37B) Dry weight 50 parts Starch particles (average) Particle size 20 μm) Dry weight 50 parts Polyvinyl benzyl trimethylammonium chloride Dry weight 1 part Water 200 parts

Comparative Example 1-H and Comparative Example 1-I Next, the compounding ratio of the cationic compound having a quaternary ammonium group (polyvinylbenzyl trimethylammonium chloride) of the pressure-sensitive adhesive 1G in dry weight is as follows. Instead, the coating was performed in the same manner as in Comparative Example 1G. The respective pressure-sensitive adhesives are blended as pressure-sensitive adhesives 1H and 1I, and the respective pressure-bonded recording papers are used as the pressure-sensitive adhesive recording papers of Comparative Example 1-H and Comparative Example 1-I. Comparative Example 1-H 200 parts by dry weight Comparative Example 1-I 0 parts by dry weight

Comparative Example 2-G Comparative Example 2-G was prepared in the same manner as in Comparative Example 1-G except that the pressure-sensitive adhesive was changed to the pressure-sensitive adhesive 2G having the following composition. A pressure-bonded recording sheet was obtained. <Pressure sensitive adhesive 2G> Acrylic ester emulsion (AE-923 manufactured by Japan Synthetic Rubber Co., Ltd.) Dry weight 60 parts Synthetic amorphous silica (Soda Tokuyama, Fanseal X37B) Dry weight 50 parts Starch particles (average) Particle size 20 μm) Dry weight 50 parts Polystyrene acrylic acid triethylammonium chloride Dry weight 1 part Water 200 parts

Comparative Example 2-H and Comparative Example 2-I Next, a cationic compound having a quaternary ammonium group of the pressure-sensitive adhesive 2G (polystyrene acrylate triethylammonium chloride).
Comparative Example 2 except that the blending ratio by dry weight of
-Coated in the same manner as G. The pressure-sensitive adhesives 2H and 2I are used in the respective pressure-sensitive adhesives, and the pressure-sensitive adhesive recording papers are the pressure-sensitive adhesive recording papers of Comparative Example 2-H and Comparative Example 2-I. Comparative Example 2-H 200 parts by dry weight Comparative Example 2-I 0 parts by dry weight

Comparative Example 3-G Comparative Example 3-G was prepared in the same manner as in Comparative Example 1-G except that the pressure-sensitive adhesive was changed to the pressure-sensitive adhesive 3G having the following composition. A pressure-bonded recording sheet was obtained. <Pressure-sensitive adhesive 3G> Acrylic ester emulsion (AE-923 manufactured by Japan Synthetic Rubber Co., Ltd.) Dry weight 60 parts Synthetic amorphous silica (Soda Tokuyama, Fanseal X37B) Dry weight 50 parts Starch particles (average) Particle size 20 μm) Dry weight 50 parts Polystyrene methacrylic acid trimethylammonium chloride Dry weight 1 part Water 200 parts

Comparative Example 3-H and Comparative Example 3-I Next, the compounding ratio by weight of the cationic compound having a quaternary ammonium group (polystyrene trimethylammonium methacrylate chloride) of the pressure-sensitive adhesive 3G is as follows. Instead of the above, coating was performed in the same manner as in Comparative Example 3-G. The respective pressure-sensitive adhesives are blended as pressure-sensitive adhesives 3H and 3I, and the respective pressure-bonded recording papers are used as the pressure-sensitive adhesive recording papers of Comparative Example 3-H and Comparative Example 3-I. Comparative Example 3-H 200 parts by dry weight Comparative Example 3-I 0 parts by dry weight

Comparative Example 4-E Comparative Example 4-E was carried out in the same manner as Comparative Example 1-G except that the pressure sensitive adhesive was changed to the pressure sensitive adhesive 4E having the following composition. A pressure-bonded recording sheet was obtained. <Pressure-sensitive adhesive 4A> Natural rubber latex Dry weight 60 parts Synthetic amorphous silica (manufactured by Tokuyama Soda, fan seal X37B) Dry weight 50 parts Calcium carbonate (manufactured by Bihoku Powder Co., Ltd., Softon 1000) Dry weight 50 parts Polystyrene acrylic Diethylamine acid Dry weight 1 part Water 200 parts

Comparative Example 4-F and Comparative Example 4-G Next, the compounding ratio of the compound having a quaternary amino group (polyethylamine acrylate acrylic acid) in the pressure sensitive adhesive 4E in dry weight was changed as follows. And applied in the same manner as in Comparative Example 4-E. The composition of each pressure-sensitive adhesive was set to pressure-sensitive adhesives 4F and 4G, and the respective pressure-sensitive recording papers were used as Comparative Example 4-F and Comparative Example 4.
Use G-bonding recording paper. Comparative Example 4-F dry weight 140 parts Comparative Example 4-G dry weight 0 part

Comparative Example 5-E Comparative Example 5-E was carried out in the same manner as Comparative Example 1-G except that the pressure sensitive adhesive was changed to the pressure sensitive adhesive 5E having the following composition. A pressure-bonded recording sheet was obtained. <Pressure Sensitive Adhesive 5E> Natural rubber latex Dry weight 60 parts Synthetic amorphous silica (manufactured by Tokuyama Soda, Fanseal X37B) Dry weight 50 parts Calcium carbonate (Bihoku Kogaku Kogyo, Softon 1000) Dry weight 50 parts Polystyrene acrylic Acid ethyldiethylamine Dry weight 1 part Water 200 parts

Comparative Example 5-F and Comparative Example 5-G Next, the compounding ratio of the compound having a quaternary amino group (polyethylamine acrylate acrylic acid) in the pressure-sensitive adhesive 5E in dry weight was changed as follows. And applied in the same manner as in Comparative Example 5-E. The respective pressure-sensitive adhesives were blended as pressure-sensitive adhesives 5F and 5G, and the respective pressure-sensitive recording papers were used as Comparative Example 5-F and Comparative Example 5.
Use G-bonding recording paper. Comparative Example 5-F 140 parts by dry weight Comparative Example 5-G 0 parts by dry weight

Comparative Example 6-E The procedure of Comparative Example 6-E was the same as that of Comparative Example 1-G except that the pressure sensitive adhesive was changed to the pressure sensitive adhesive 6E having the following composition. A pressure-bonded recording sheet was obtained. <Pressure Sensitive Adhesive 6E> Natural rubber latex Dry weight 60 parts Synthetic amorphous silica (Tokuyama Soda, Fanseal X37B) Dry weight 50 parts Calcium carbonate (Bihoku Powder Co., Ltd., Softon 1000) Dry weight 50 parts Polyvinyl benzyl Dimethylamine Dry weight 1 part Water 200 parts

Comparative Example 6-F and Comparative Example 6-G Next, the compounding ratio of the compound having a quaternary amino group (polyethyl styrene acrylate diethylamine) in the pressure sensitive adhesive 6E in dry weight was changed as follows. And applied in the same manner as in Comparative Example 6-E. The composition of each pressure-sensitive adhesive was set to pressure-sensitive adhesives 6F and 6G, and the respective pressure-sensitive recording papers were prepared as Comparative Examples 6-F and Comparative Example 6.
Use G-bonding recording paper. Comparative Example 6-F 140 parts by dry weight Comparative Example 6-G 0 parts by dry weight

Example 7 A commercially available color ink jet printer (MJ-700V) was applied to the pressure-sensitive recording papers obtained in the above Examples and Comparative Examples.
2C, made by Epson)
The pressure-sensitive adhesive layer on which the ink-jet recording was performed was folded with the pressure-sensitive adhesive layer facing each other, and the pressure-sensitive adhesive layer was passed through a pressure roller to be pressure-bonded and integrated to obtain a folded pressure-bonded recording paper. The pressure-sensitive adhesive layers provided in Examples and Comparative Examples do not exhibit tackiness in a normal state, and even when the pressure-sensitive recording paper is introduced into an ink jet printer for printing and recording, the paper feed, print head, etc. are not damaged. It was possible to print and record without causing any trouble.

Example 8 A commercially available color ink jet printer (MJ-700V) was applied to the pressure-sensitive recording papers obtained in the above-mentioned Examples and Comparative Examples.
2C, made by Epson)
Drying was performed for 10 seconds at 500 W with a commercially available high frequency device. After that, the pressure-sensitive adhesive layer on which the ink-jet recording was performed was folded so that the pressure-sensitive adhesive layers face each other, and the pressure-sensitive adhesive layer was passed through a pressure roller to be pressure-bonded to obtain a folded pressure-bonded recording paper. The pressure-sensitive adhesive layers provided in Examples and Comparative Examples are
It does not show tackiness in a normal state, and even if pressure-bonded recording paper is introduced into an inkjet printer for printing and recording,
It was possible to print and record without causing any trouble to the paper feed and print head.

When a similar pressure-sensitive adhesive layer was provided on the back surface of the pressure-sensitive recording paper obtained in Examples or Comparative Examples, a double-sided adhesive pressure-sensitive recording paper was obtained. The double-sided pressure-sensitive recording paper was folded into a Z-shape, passed through a pressure-bonding roller as it was, and pressure-bonded to obtain a tri-fold pressure-bonded recording sheet, and the print recording surface of the folded portion was completely hidden.

The pressure-sensitive recording papers obtained in Examples and Comparative Examples were tested by the following method.

<Ink acceptability> Ink jet recording is
As shown in Example 7, a commercially available color inkjet printer (MJ-700V2C, manufactured by Epson) was used. The sharpness of the print was visually judged. Clear images and prints were evaluated as excellent, those that were slightly lacking in clarity but did not interfere with the decoding of the images and prints were ranked, and those where the images were blurred and unclear were judged as poor. The results are described in the corresponding portions of Examples and Comparative Examples.

<Pressure Sensitivity Before Printing> The pressure-sensitive adhesive recording papers of Examples and Comparative Examples before recording are folded in two in a postcard size (10 cm × 15 cm) with the pressure-sensitive adhesive layer inside, and a pressure-sensitive adhesive roller with variable clearance. (SP401, manufactured by Japan ADM Co., Ltd.) was used for compression bonding. The pressurization was adjusted on the clearance scale, and level 6 was used by folding in half. After pressure bonding, it was cut into a strip shape with a width of 30 mm, and the 180 ° peel strength was measured with a Tensilon universal tensile tester. The peel strength is 20 to 200 gf / 30 mm, which allows good peeling without accidental peeling during mailing, and peeling occurs during mailing if the peel strength is lower than that. Easy to do,
If it is higher than that, problems such as tearing of the paper are likely to occur when peeling. In addition, regarding the pressure-bonding property, when the pressure-bonding property is weak and cannot be measured, it is indicated by-.

<IJ (ink jet) pressure-bonding property after printing> The pressure-sensitive adhesive recording papers of Examples and Comparative Examples in which ink-jet recording (manufactured by Epson, MJ-700V2C) was made with a pressure-sensitive adhesive layer inside (10 cm ×). (15 cm) was folded in two, and pressure-bonding was performed by passing it through a pressure-bonding roller (SP401, manufactured by Japan ADM) with variable clearance. The pressurization was adjusted on the clearance scale, and level 6 was used by folding in half. After pressure bonding, it was cut into a strip shape with a width of 30 mm, and the 180 ° peel strength was measured with a Tensilon universal tensile tester. The peel strength is 20 to 200 gf / 30 mm, which allows good peeling without accidental peeling during mailing, and peeling occurs during mailing if the peel strength is lower than that. If it is higher than that, problems such as tearing of the paper are likely to occur when peeling.

<Pressure-bonding property after NIP printing> The pressure-sensitive adhesive recording papers of Examples and Comparative Examples in which recording was carried out by a laser printer (manufactured by Canon, laser shot B406E) with a pressure-sensitive adhesive layer on the inside were a postcard size (10 cm ×). (15 cm) was folded in two, and pressure-bonding was performed by passing it through a pressure-bonding roller (SP401, manufactured by Japan ADM) with variable clearance. Adjust the pressure on the clearance scale to 2
Level 6 was used for folding. After crimping, cut it into strips with a width of 30 mm and use a Tensilon universal tensile tester to make 18
The 0 ° peel strength was measured. The peel strength is 20 to 200 gf / 30 mm, which allows good peeling without accidental peeling during mailing, and peeling occurs during mailing if the peel strength is lower than that. If it is higher than that, problems such as tearing of the paper are likely to occur when peeling.

<Show-through> In the pressure-bonding test, the degree of transfer of ink (show-through) to the facing surface where the ink jet recording portion is in contact was visually determined. There is no show-through, the one with a clean face is excellent, the one with a slight show-through is good, and the one with a show-through that is unreadable to the face-to-face record is a good ink. It was judged that the level at which it was difficult to read the face-to-face record was bad, and about half of the ink was transferred, and the face-to-face record could not be read at all.

<Show-through after Drying> In Example 8, the show-through property of the ink after being dried at a high frequency was determined in the same manner as the above-mentioned criteria. The results are described in the corresponding portions of Examples and Comparative Examples.

<Water resistance> Water was sprayed onto the ink jet recording portion and the state after 5 minutes was observed. Excellent for images and prints that remain clear without any bleeding, good level for which a slight amount of bleeding occurs but not disturbing, and for those with slight bleeding that do not interfere with decoding of recorded contents The level at which bleeding and stains were poor was judged, and the level at which the recorded contents were bleeding and almost unreadable was judged as poor.

Tests were carried out by the above method, and the evaluation results are shown in Tables 1 to 3 below.

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[Table 1]

[0078]

[Table 2]

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[Table 3]

Evaluation: The pressure-sensitive recording papers obtained in the examples were excellent in printability, pressure-bonding property and water resistance in ink jet recording, and were free from harmful effects such as transfer of the ink in the color-developed portion to the facing surface even after peeling. It had excellent recordability and handleability, and provided an excellent folding pressure-sensitive recording paper. Further, even with the pressure-sensitive recording paper of the present invention, when the heat-fixing type printing method such as a laser printer is used, the pressure-sensitive adhesive property is remarkably deteriorated, but in the ink jet recording, the pressure-sensitive adhesive property is not conspicuously decreased due to the non-heating method. Further, it was found that the ink show-through property can be further improved without impairing the pressure-bonding property by performing high-frequency drying after inkjet recording on the pressure-bonding recording paper.

On the other hand, the pressure-sensitive adhesive recording paper of the comparative example cannot be used for this purpose because the pressure-sensitive adhesiveness and the ink acceptability cannot be balanced. In particular, during press-bonding, since the ink is transferred to the facing surface due to the show-through, the printed record becomes very difficult to read after peeling.

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EFFECTS OF THE INVENTION The pressure-sensitive recording paper of the present invention has good ink fixability in ink jet recording and provides a pressure-sensitive recording paper excellent in water resistance. Therefore, the pressure-sensitive recording paper is heated in the printing step and the fixing step. Therefore, it is possible to perform printing without causing deterioration of the pressure-sensitive adhesive surface, prevent generation of useless odor, and provide a good folding pressure-sensitive recording paper. In the pressure-sensitive adhesive recording paper of the present invention, probably because the fixability of the ink after inkjet recording on the pressure-sensitive adhesive layer is improved, the transfer of the ink to the opposite surface even after peeling after pressure-bonding,
So-called show-through is suppressed, and a readable confidential postcard can be reliably manufactured at low cost, which makes it easy to read a record on the entire pressure-bonding surface. In addition to the peelable postcard, the present invention can be used in many applications such as continuous slips, sticky slips, labels, recording, dust-free recording paper, and has great industrial significance.

Claims (4)

[Claims] 1. A pressure-bonding device that has a pressure-sensitive adhesive layer that does not exhibit tackiness or adhesiveness under normal conditions but exhibits adhesiveness under pressure on at least one surface of the support, and the adhesion under pressure is peelable after adhesion. In the recording paper, the pressure-sensitive adhesive layer contains a cationic compound having a quaternary ammonium group in an amount of 1 to 50% by weight based on the solid content of the pressure-sensitive adhesive layer. 2. A pressure-sensitive adhesive having a pressure-sensitive adhesive layer which does not exhibit tackiness or adhesiveness under normal conditions but exhibits adhesiveness under pressure on at least one surface of the support, and the adhesion under pressure is peelable after adhesion. In the recording paper, the pressure-sensitive adhesive layer contains a compound having a tertiary amino group in an amount of 1 to 40 based on the solid content weight of the pressure-sensitive adhesive layer.
A pressure-sensitive adhesive recording paper, characterized in that the content is wt%. 3. A pressure-sensitive adhesive layer containing a cationic compound having a quaternary ammonium group or a compound having a tertiary amino group on at least one side of a support, and in a normal state, it has both tackiness and adhesiveness. Adhesiveness under pressure is not shown, and adhesion under pressure is peelable after adhesion. Recording is performed on the pressure-sensitive adhesive layer of a pressure-sensitive recording paper by an inkjet method, and the inkjet-recorded pressure-sensitive adhesive is folded inside. A method for producing a folding pressure-sensitive recording paper, which comprises pressure-bonding. 4. A pressure-sensitive adhesive layer containing a cationic compound having a quaternary ammonium group or a compound having a tertiary amino group on at least one side of a support, and in a normal state, both tackiness and adhesiveness are provided. Adhesiveness under pressure is not shown, and the pressure-sensitive adhesive layer of the pressure-sensitive recording paper, which exhibits adhesiveness upon pressurization and can be peeled off after adhesion, is recorded by an inkjet method, and then the recording surface is dried by high-frequency heating, After that, the pressure-sensitive adhesive recorded by the ink jet recording is folded and pressure-bonded inside, and a method for manufacturing a folding pressure-sensitive recording paper.