JPH0764315A - Recording paper - Google Patents

Abstract

PURPOSE:To prevent the emission of odor at the time of copying and to improve environment at the time of production and at the time of copying. CONSTITUTION:A mat layer 3 and an antistatic layer 4 are laminated on a substrate 2 produced by sticking Japanese paper to both sides of a plastic film with an adhesive to obtain the objective recording paper 1. The antistatic layer 4 is formed by adding an antistatic agent and a natural vegetable deodorant to a mixture of styrene-acrylic resin as a water-dispersible resin with polyacrylic ester and applying the resulting dispersion liq. A toner adheres tightly to the paper 1 and does not fall off. The paper 1 has desired electric conductivity and feed in a superposed state is not caused. Since an org. solvent is not used and the natural vegetable deodorant is contained, the paper 1 does not emit odor even when heated at the time of copying.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to copying paper such as electrophotographic copying machines and laser printers, or recording paper such as drafting paper.

[0002]

2. Description of the Related Art In recent years, output to various types of slips, securities, bankbooks and the like has been mostly made by a laser printer or the like by computer processing. Conventionally, synthetic paper, drafting film, tracing film, etc. have been used for recording paper used for such output, facsimile output recording paper, copy paper used for copying in electrophotographic copying machines, drafting paper, etc. It is used.

The one used as a copy sheet is one whose surface is resin-processed in order to achieve close contact with the toner.
Some of the materials used for drawing have a matte surface so that they can be added with a pencil.

[0004]

However, since these are not provided with an antistatic function, when they are used in an electrophotographic copying machine, a laser printer or the like, double feeding of paper occurs due to static electricity during paper passing. There was an inconvenience. In order to solve these drawbacks, a recording paper in which a mat layer of Japanese paper or western paper and a resin containing a white pigment is sequentially laminated on a polyester film, and a conductive layer for preventing electrification is further formed thereon (Japanese Patent Publication No. No. 59977) has been proposed. Such a recording paper has good adhesion to toner, good paper-passing properties in a copying machine, and is free from warpage and wrinkling due to environmental changes such as temperature and humidity, but it does not form a matte layer. The binder resin, organic solvent, and the like that are present generate an odor peculiar to the resin during copying in an electrophotographic copying machine, which deteriorates the working environment.

The present invention has been made in order to solve the above-mentioned problems, and has good adhesiveness with toner, good paper-passing property, is not affected by environment, and has no odor during copying. The purpose is to provide.

[0006]

The recording paper of the present invention which achieves such an object is provided with a mat layer on one side or both sides of a support, and a water dispersion resin, an antistatic agent and an erase agent are provided on the mat layer. An antistatic layer composed of an odorant is provided. Further, the support may be a plastic film, or may be a plastic film on which both sides of Japanese paper or western paper are attached.

The water-dispersed resin is preferably a mixture of styrene acrylic resin and polyacrylic acid ester. The recording paper of the invention will be described below. In the recording paper 1 of the present invention, a mat layer 3 is provided on one side or both sides of a support 2, and an antistatic layer 4 is further provided on the mat layer 3.
Is provided.

The support is preferably one that does not warp or wrinkle under the influence of environmental changes such as temperature and humidity, or is thin so as not to be bulky, and may be transparent or opaque.
Examples of such a material include plastic films made of polyester, polycarbonate, cellulose acetate, polyimide, polyethylene, polystyrene, polypropylene and the like. Further, when used as a copy sheet, a polyester film having particularly excellent heat resistance is preferable.

Further, as the support, there may also be used such a plastic film on which one or both sides of Washi paper or Western paper is attached via an adhesive. Washi paper or western paper not only enhances the texture and texture, but also has the effect of preventing undulation of the plastic film caused by the fixing heat during copying and maintaining good flatness.

The raw materials for Japanese paper include swordfish, hemp, sanpei, goosehide, and the raw materials for western paper include wood pulp and synthetic pulp, both of which are formed by mechanical polishing. The thickness is about 6 to 29 g / m ² , preferably 9 to 15 g / m ^2.
Is. An adhesive may be used when laminating Japanese paper or Western paper on a plastic film. As the adhesive used, for example, urea resin type, phenol type, resorcinol type, epoxy type, polyurethane type, polyester type, isocyanate type, vinyl acetate type, acrylic type,
Adhesives such as cyanoacrylate type, copolymer nylon type and modified rubber type are used.

The matte layer provided on such a support contains a binder resin and a matting agent, and has a center line average surface roughness (hereinafter referred to as Ra) of 0.1 to 10 μm.
It is about m and is provided to improve the writing property of a pencil or the like. As the matting agent, known ones as extender pigments such as finely powdered silica, alumina and calcium carbonate are used. Also, when used for applications requiring concealment,
Color pigments such as titanium dioxide, antimony oxide and zinc sulfide may be used in combination with these extender pigments. Apply these matting agents to a known binder resin such as vinyl chloride resin, vinyl chloride-vinyl acetate copolymer, acrylic resin, polyester, nitrocellulose, vinylidene chloride resin to form a coating agent. Provided by. The mixing ratio of binder resin and matting agent is resin 1
The matting agent is 10 to 30% by weight, preferably 15 to 20% by weight, based on 00% by weight.

The antistatic layer provided on such a mat layer is composed of a water-dispersed resin, an antistatic agent and a deodorant, and is water-resistant and solvent-resistant with respect to the film after writing or after toner fixing and drying. And the desired surface electric resistance value improve the fixing property of the toner and have an antistatic effect. Therefore, it is possible to prevent double feeding from the paper supply unit of the copying machine. The desired surface electric resistance value is 10 ⁹ to 10 ¹³ Ω, preferably 10 ¹⁰ to 10 ¹² Ω. If it is less than 10 ⁹ Ω, the fixing property of the toner during copying becomes poor, and 10 ¹³ Ω
If it is larger than the above range, the toner is scattered and the toner is not transferred uniformly, which is not preferable.

As the antistatic agent, known anionic compounds,
Various cationic and nonionic surfactants, special nonionic surfactants, and inorganic salts such as sulfates, phosphates and sulfonates can be used. The antistatic agent is used in an amount of 1 to 15% by weight based on 100% by weight of the water-dispersed resin in order to achieve the above resistance value. If it is less than 1% by weight, the required antistatic effect cannot be obtained, and if it exceeds 15% by weight, the adhesiveness of the toner is deteriorated and the coating liquid is gelated, which is not preferable.

The water-dispersed resin is used as a binder resin, and is a water-insoluble resin in the form of an emulsion or dispersion. Since the water-dispersed resin is not water-soluble, it does not cause inconvenience such as finger marks even when handled as a product, for example, even when it is handled with a sweaty hand, and it is not soluble in an organic solvent. A solvent property can be imparted. The water-dispersed resin is selected from resins that do not cause ink bleeding, polyacrylic acid ester-based resin,
Polyvinyl acetate type, polystyrene type, polyethylene type,
Emulsions or dispersions of a resin such as polyester can be used alone or as a mixture. The ratio of resin to water is 5 to 2 for 100% by weight of water.
It is 0% by weight, preferably 10 to 15% by weight.

Particularly preferred water-dispersible resins from the viewpoint of work environment during copying are polyacrylic ester resins and styrene acrylic resins. When a polyacrylate ester resin emulsion or dispersion is used, the toner concentration can be improved, and when a styrene acrylic resin emulsion or dispersion is used, the toner fixing is significantly improved. be able to. It is more preferable to use a styrene acrylic resin and a polyacrylic acid ester resin in a mixture of 1: 1 to 1: 9.

The coating property can be improved by adding a small amount of water-soluble resin such as polyacrylic acid or polyvinyl alcohol to the above resin. Further, the deodorant added to the antistatic layer absorbs the odor generated during copying. Deodorants include multiple plants such as cedar, cypress, nettle, fir, camphor tree, black pine, red pine, persimmon, bamboo grass, zozo, pine, mugwort, tea, birch, perilla, aloe, Japanese pepper, flaxseed, etc. Components obtained by vacuum dry distillation, which is obtained by mixing a coalescing agent and distilled water, plant dry distillation components, folic acid, chlorophyll, organic acids having a hydroxyl group, vegetable oils and fats, acetic acid, various terpenes, apietic acid, It contains various vitamins and surfactant equivalents. Deodorant is water-dispersed resin 1
0.5 to 5.0% by weight is blended with respect to 00% by weight. If it is less than 1% by weight, a sufficient deodorizing effect cannot be obtained, and if it exceeds 5.0% by weight, the adhesiveness of the toner is deteriorated, which is not preferable.

In order to form the antistatic layer, a dispersion liquid in which an aqueous dispersion resin is dispersed in water is prepared, an antistatic agent and a deodorant are mixed, and a coating liquid is prepared. Further, alcohol or the like may be added to accelerate drying of the coating film and improve workability. As a method of applying the coating liquid, for example,
It may be roll coating, kiss coating, reverse coating, bar coating, gravure coating, or the like, and the coating amount may be 0.7 to 2.3 g / m ² .

The recording paper of the present invention having the antistatic layer having such a constitution can obtain a desired surface electric resistance value which is not influenced by the surrounding environment, and prevents the double feeding of the paper during copying, Adhesiveness with toner is good, and the toner is not peeled from the surface even when it comes into contact with an adhesive tape or the like. Further, odor is not generated by heating during copying as well as during manufacturing, and the manufacturing environment and working environment can be improved. In addition, by using an aqueous dispersion resin that is not water-soluble without using an organic solvent, after writing or toner fixing,
It has water resistance and solvent resistance even after drying.

The above description is an embodiment of the present invention.
Needless to say, the present invention is not limited to these, and a known additive for obtaining a desired effect may be added to the antistatic layer.

[0020]

In the recording paper of the present invention, the antistatic layer contains a water dispersion resin, an antistatic agent and a deodorant. It is possible to obtain a toner having a desired surface electric resistance value which does not depend on the surrounding environment by containing a desired amount of the antistatic agent, toner does not fall off, and double feeding of paper does not occur. Furthermore, since the water-dispersed resin is used and the deodorant is added, no odor is generated even during heating during manufacturing and copying, and the manufacturing environment
The working environment can be improved. It has solvent resistance and water resistance, and the organic solvent remaining in the matte layer during copying does not volatilize, damaging the photosensitive drum. Even if it is handled with, there will be no inconvenience such as marking of fingers.

[0021]

【Example】

Example 1 An acrylic resin emulsion type adhesive was applied to both sides of a transparent polyester film having a thickness of 25 μm using a roll coater.
It is applied so as to be g / m ² and dried, and then a mat layer coating solution having the following composition is prepared on both sides of a support having Washi paper 13 g / m ² adhered on both sides thereof, and a gravure coater is applied to give 1 g / m 2. ^It was applied and dried so as to be ² to form a matte layer. An antistatic layer coating solution having the following composition was applied onto the matte layer by a gravure coater so as to be 0.8 g / m ² and dried to obtain a recording sheet of the present invention. (Coating liquid for mat layer) -Acrylic polyol 20 parts by weight (Acrydic A-801: manufactured by Dainippon Ink and Chemicals, Inc.)-Isocyanate prepolymer 6 parts by weight (Coronate L: manufactured by Nippon Polyurethane Industry Co., Ltd.)- Silica powder 1 part by weight (Sylysia 740: manufactured by Fuji Silysia Chemical Ltd.) ・ Methyl ethyl ketone 15 parts by weight ・ Toluol 20 parts by weight (coating liquid for antistatic layer) ・ Acrylic emulsion 3 parts by weight (John Krill 780: manufactured by Johnson Polymer Co., Ltd.) ) -Acrylic emulsion 10 parts by weight (Nikazor RX301: manufactured by Nippon Carbide Industry Co., Ltd.)-Antistatic agent 1 part by weight (VERSA TL-125: manufactured by Kanebo NSC Co., Ltd.)-Deodorant 0.2 parts by weight (Smelarnak 100: manufactured by Tokai Kosan Co., Ltd.) ・ Water The recording paper obtained has no odor when copied. It did not. Further, the adhesion of the toner was very good, and even if the adhesive tape was pressed, the toner did not fall off. Further, there was no double feeding of paper during copying, and no marks of fingers were recognized even when touched with water after copying.

[0022]

EFFECT OF THE INVENTION The recording paper of the present invention contains no water-dispersing resin in the antistatic layer without using a deodorant or an organic solvent. The environment can be improved. Furthermore, the toner has good adhesion, and the toner does not fall off even when contacted with an adhesive tape.
Highly antistatic effect prevents double feeding of paper during copying. Furthermore, since no water-soluble resin is used, no finger marks or the like are produced even when handled.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment to which the present invention is applied.

[Explanation of symbols]

 1 ... Recording paper 2 ... Support 3 ... Matt layer 4 ... Antistatic layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B32B 27/20 A 8413-4F B42D 15/00 301 Z 311 E 361 D D21H 27/30

Claims (4)

[Claims] 1. A recording sheet comprising a support having a mat layer on one side or both sides thereof, and an antistatic layer comprising a water-dispersed resin, an antistatic agent and a deodorant provided on the mat layer. . 2. The recording paper according to claim 1, wherein the support is a plastic film. 3. The recording paper according to claim 1, wherein the support is a plastic film on which both sides of Japanese paper or Western paper are attached. 4. The recording paper according to claim 1, wherein the water-dispersed resin is a mixture of styrene acrylic resin and polyacrylic acid ester.