JPH08314177A - Recording material - Google Patents

Abstract

PURPOSE: To suppress waving due to the heat of fixation at the time of copying and to satisfy all of such properties as the fixability of a toner, writability with a pencil and water-color ink and solvent resistance by using a resin binder contg. a specified wt.% or more of silicone resin and incorporating a matting agent by a specified wt.% of the amt. of the binder. CONSTITUTION: A mat layer consisting of a resin binder and a matting agent is formed on both sides of a substrate to obtain the objective recording material. The binder contains >=60wt.% silicone resin and the matting agent is contained by 5-75wt.% of the amt. of the binder. The substrate is, e.g., a plastic film of polyester, polycarbonate, cellulose acetate, polyimide, PE, polystyrene, PP, etc., and a polyester film is especially suitable from the viewpoint of cost, planeness, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording material suitable for electrophotographic copying machines and laser printers.

[0002]

2. Description of the Related Art In recent years, output to various types of slips, securities, bankbooks, and the like has mostly been made by a laser printer or the like by computer processing. Also in the second original drawing, a system using a conventional photosensitive material is being changed to a system using a laser printer or an electrophotographic copying machine.

As a recording material used in such a laser printer or an electrophotographic copying machine, there is a recording material in which a polyester film is used as a base material in order to obtain strength and dimensional stability, and an easy toner adhesion layer is provided thereon. In addition, since such a recording material is often added with a pencil, a water-based ink, etc. after being output by a laser printer or the like,
A mat layer is provided on the base material.

[0004]

However, with the recent increase in speed of laser printers and electrophotographic copying machines, the fixing temperature of the toner has become extremely high, and the one using a polyester film as a support is thermally deformed. It has caused trouble and is in trouble. Therefore, there is a need for a recording material that does not undergo thermal deformation even at the fixing temperature of a laser printer or the like.

As such a recording material, it is conceivable to use a plastic having a very high heat resistance as a base material, but such a material is very expensive and is used for applications such as slips and second original drawing film. To do is not realistic.

Therefore, the present inventor has improved the matte layer provided on the base material to reduce the waviness caused by the fixing heat during copying, and to fix the toner, the writing property of pencils and aqueous inks, and the solvent resistance. The present invention has been completed on the assumption that a recording material satisfying all the properties such as (toner erasability) can be obtained.

[0007]

The recording material of the present invention has a structure in which a mat layer composed of a binder resin and a matting agent is provided on both sides of a support, and 60% by weight or more of the binder resin is a silicone resin. In addition, the matting agent is contained in an amount of 5 to 75% by weight with respect to the binder resin.

The present invention will be described in detail below.

Examples of the support include plastic films made of polyester, polycarbonate, cellulose acetate, polyimide, polyethylene, polystyrene, polypropylene and the like. Among them, the polyester film is particularly preferable in terms of price and flatness.

Further, as the support, there can also be used such a film in which Japanese paper or Western paper is pasted on both sides via an adhesive agent. Such a material not only enhances the texture and texture, but also has the effect of reducing the waviness caused by the fixing heat during copying.

As the raw material for Japanese paper, there can be used sword bean, hemp, Sanmaki, gankin, and as raw material for western paper, wood pulp, synthetic pulp, etc., and the basis weight is 6 to 29 g / m ² , preferably 9 to.
Those of 15 g / m ² are suitable for the present invention.

When Japanese paper or Western paper is attached to a plastic film, an adhesive is usually used. Examples of the adhesive used include urea-based, phenol-based, resorcinol-based, epoxy-based, urethane-based, polyester-based,
Examples of the adhesive include isocyanate-based, vinyl acetate-based, acrylic-based, cyanoacrylate-based, copolymer nylon-based, and modified rubber-based adhesives.

The matte layer provided on both sides of the support comprises a binder resin and a matting agent.

A silicone resin is used as the binder resin. As the silicone resin, in addition to pure silicone resin, silicone resin modified with alkyd resin, polyester resin, epoxy resin, acrylic resin, urethane resin or the like can be used.

As the binder resin, various resins other than the above silicone resin can be used in combination. Even in this case, the content of the silicone resin in the binder resin is 60% by weight or more. Further, it is more preferable to set it to 90% by weight or more. When the content is 60% by weight or more, waviness caused by heat is reduced, and toner fixability, solvent resistance, and writability of water-based ink are markedly improved.

Examples of the resin other than the silicone resin used as the binder resin include alkyd resin, acrylic resin, melamine resin, epoxy resin, phenol resin, styrene-maleic acid resin and butyral resin. By blending these resins with a silicone resin, the flexibility, toner fixability, and writability of the water-based ink can be adjusted, although the heat resistance is slightly inferior.

As the matting agent, known matting agents such as inorganic particles of silica, alumina, calcium carbonate, magnesium carbonate and the like, polymer particles of acrylic resin, styrene resin, silicone resin and the like can be used. The particle size of the matting agent is 1.0 to 10 μm, preferably 2.0 to 5.
By using the toner having a thickness of 0 μm, the toner fixability, the pencil and the water-based ink writability are very good.

The mixing ratio of the matting agent is 5 to 75% by weight, more preferably 10 to 30% by weight, based on the solid content of the binder resin. This is because in such a range, performances such as toner fixing property and writing property of pencil and water-based ink are remarkably improved.

In addition to the above-mentioned binder resin and matting agent, a curing catalyst, an antistatic agent, a coatability improving agent, an ultraviolet absorber, a dye and the like can be added to the matting layer as appropriate. In particular, when platinum, lead, iron, manganese, zinc and metallic soaps thereof are used as a curing catalyst, the silicone resin can be cured at a low temperature, and the flatness deterioration of the recording material during production can be eliminated. .

If necessary, an antistatic layer or the like can be provided on the mat layer so as not to impair the performance of the mat layer.

For the above-mentioned mat layer and the like, the above-mentioned materials are dissolved or dispersed in a solvent to prepare a coating solution, and known coating methods such as roll coating, kiss coating, reverse coating, bar coating, It is formed by applying and drying using a gravure coating method or the like.

[0022]

Since the recording material of the present invention uses a specific matte layer, it reduces waviness caused by fixing heat at the time of copying, toner fixing property, writing property of pencil and aqueous ink, solvent resistance (toner erasing property). All of the sex) are satisfied.

[0023]

EXAMPLES The present invention will be described in detail below with reference to examples. In the examples, "%" and "parts" are based on weight unless otherwise specified.

[Example 1] A mat layer coating solution having the following composition was prepared, and coated on both sides of a polyester film having a thickness of 50 µm by a gravure coater so as to be ² g / m ^2, and dried at 120 ° C for 1 minute. , A matte layer was formed.

(Mat layer coating liquid) Pure silicone varnish (solid content: 50%) 49 parts (TSR116: Toshiba Silicone Co., Ltd.) Silica (average particle size 3.5 μm) 5 parts (Sylysia 445: Fuji Silysia Chemical Ltd.)・ Catalyst (CR13: Toshiba Silicone Co., Ltd.) 1 part ・ Methyl ethyl ketone 20 parts ・ Toluene 25 parts

Next, an antistatic agent layer coating solution having the following composition was applied onto both surfaces of the obtained matte layer by a gravure coater so as to be 1 g / m ^2, and dried at 110 ° C. for 30 seconds, A recording material was obtained.

(Antistatic agent layer coating liquid) -Acrylic resin emulsion (solid content: 43%) 10 parts (Joncryl 840: Johnson Polymer Co., Ltd.)-Methacrylic acid ester 55 parts (Nicazole RX66P: Nippon Carbide Co.)-Antistatic agent 5 parts (VERSA TL-125: Kanebo NSC) ・ Water 20 parts ・ Meta-modified alcohol 10 parts

[Example 2] A urethane adhesive was applied to both sides of a polyester film having a thickness of 50 µm by a gravure coater so as to be 3 g / m ^2, and after drying, 13 g / m ² of Japanese paper was applied to both sides. A support was also prepared.

A matte layer coating solution having the following composition was prepared and applied on both sides of the support obtained above by a gravure coater so as to be ² g / m ² and dried at 120 ° C. for 1 minute to form a matte layer. Then, a recording material was obtained.

(Mat layer coating liquid) Pure silicone varnish (50% solid content) 49 parts (TSR116: Toshiba Silicone Co., Ltd.) Silica (average particle size 3.5 μm) 5 parts (Sylysia 445: Fuji Silysia Chemical Co., Ltd.) Catalyst (CR12: Toshiba Silicone Co., Ltd.) 0.5 part ・ Antistatic agent 0.5 part (Statistice: Analytical Chemical Laboratory Co.) ・ Methyl ethyl ketone 20 parts ・ Toluene 25 parts

[Example 3] A mat layer coating solution having the following composition was prepared and applied on both sides of a polyester film having a thickness of 50 µm by a gravure coater so as to be ² g / m ^2, and dried at 120 ° C for 1 minute. , A matte layer was formed.

(Matte layer coating liquid) -Pure silicone varnish (solid content 50%) 45 parts (TSR144: Toshiba Silicone Co.)-Acrylic resin (solid content 45%) 5 parts (Acrylic A-166: Dainippon Ink and Chemicals) Industrial Co., Ltd. ・ Silica (average particle size 3.5 μm) 5 parts (Sylysia 445: Fuji Silysia Chemical Ltd.) ・ Catalyst (CR12: Toshiba Silicone Co., Ltd.) 0.5 parts ・ Ethyl acetate 44.5 parts

Next, the antistatic agent layer coating solution used in Example 1 was applied on both sides of the obtained matte layer with a gravure coater to a concentration of 1 g / m ² and dried at 110 ° C. for 30 seconds. Then, a recording material was obtained.

[Example 4] A urethane adhesive was applied to both sides of a polyester film having a thickness of 50 µm by a gravure coater so as to be 3 g / m ² , dried, and then 13 g / m ² of Japanese paper was pasted on both sides. A support was also prepared.

A mat layer coating solution having the following composition was prepared, and applied on both sides of the support obtained above by a gravure coater so as to be ² g / m ² , and dried at 120 ° C. for 1 minute to form a mat layer. Then, a recording material was obtained.

(Matt layer coating liquid) Pure silicone varnish (solid content 50%) 50 parts (TSR144: Toshiba Silicone Co., Ltd.) Silica (average particle size 3.5 μm) 5 parts (Sylysia 445: Fuji Silysia Chemical Co., Ltd.) Catalyst (CR13: Toshiba Silicone Co., Ltd.) 1.5 parts-Ethyl acetate 43.5 parts

[Comparative Example 1] A mat layer coating solution having the following composition was prepared and coated on both sides of a polyester film having a thickness of 50 μm by a gravure coater so as to have a dry thickness of 2 g / m ² , and at 120 ° C. for 1 minute. After drying, a mat layer was formed to obtain a recording material.

(Mat layer coating liquid) -Acrylic polyol (solid content 50%) 50 parts (Acrydic A-808: Dainippon Ink and Chemicals, Inc.)-Isocyanate curing agent 5 parts (Takenate A-10: Takeda Pharmaceutical Co., Ltd.) ) ・ Silica (average particle size 3.5 μm) 5 parts (Sylysia 740: Fuji Silysia Chemical Ltd.) ・ Methyl ethyl ketone 20 parts ・ Toluene 20 parts

[Comparative Example 2] The antistatic agent layer coating solution used in Example 1 was applied to both sides of the matte layer of the recording material obtained in Comparative Example 1 with a gravure coater so as to have a concentration of 1 g / m ² . It was applied and dried at 110 ° C. for 30 seconds to obtain a recording material.

[Comparative Example 3] A urethane adhesive was applied to both sides of a polyester film having a thickness of 50 µm by a gravure coater so as to be 3 g / m ² , dried, and 13 g / m ² of Japanese paper was pasted on both sides. A support was also prepared.

A matte layer coating solution having the following composition was prepared and applied on both sides of the support obtained above by a gravure coater so that the dry thickness would be ² g / m ² , and the temperature was 1 ° C. at 120 ° C.
After drying for a minute, a recording material was obtained.

(Mat layer coating liquid) -Acrylic polyol (solid content 50%) 50 parts (Acrydic A-801: Dainippon Ink and Chemicals, Inc.)-Isocyanate curing agent 5 parts (Takenate A-10: Takeda Pharmaceutical Co., Ltd.) ) ・ Silica (average particle size 2.5 μm) 5 parts (Sylysia 435: Fuji Silysia Chemical Ltd.) ・ Methyl ethyl ketone 20 parts ・ Toluene 20 parts

[Comparative Example 4] The antistatic agent layer coating solution used in Example 1 was applied to both sides of the matte layer of the recording material obtained in Comparative Example 3 with a gravure coater to a concentration of 1 g / m ² . It was applied and dried at 110 ° C. for 30 seconds to obtain a recording material.

The recording materials obtained in the above Examples and Comparative Examples were evaluated as follows.

"Wave": XEROX 5080 (A0 size large-scale copying machine) was used, and what was printed on the recording material was visually evaluated.

"Toner Fixability": A toner image printed on a recording material was rubbed with a finger using XEROX5080, and a cellophane tape (No. 405: Nichiban Co., Ltd.) was adhered and peeled off.

"Toner erasability": The toner image was erased using a correction liquid (Spatol L: Kimoto Co.), and the erasability of the toner and the state of the coating film after the erasure were visually evaluated.

"Pencil writing ability": 2H, HB pencil (un
(i: Mitsubishi Pencil Co., Ltd.), and the streak and disorder of the image lines were visually evaluated.

"Pencil erasability": Writing with a 2H pencil (uni: Mitsubishi Pencil Co., Ltd.) and erasing the image with an eraser.
The erased portion was visually inspected to evaluate the degree of ghost (remaining).

"Ink writing property": Writing was performed using a drawing ink (Castel TG-1), and the thickening and blurring of the image line were evaluated.

"Printability": Offset printing is performed and U
The fixability of the V ink and the stain on the substrate of the printed matter were evaluated.

"AS property": The surface electric resistance value was measured by leaving it for 2 hours under the conditions of 20 ° C and 65% RH.

The evaluation results are shown in Table 1.

In the above evaluation, "⊚" indicates very excellent, "○" indicates excellent, "Δ" indicates slightly inferior, and "x" indicates inferior.

[0055]

[Table 1]

The recording materials of Examples 1 and 3 were excellent in all evaluations. Since the recording materials of Examples 2 and 4 use a film sanded with Japanese paper as a support, waviness due to fixing heat was further reduced as compared with Examples 1 and 3.

In Comparative Examples 1 and 2, the waviness due to the fixing heat was large. Comparative Examples 3 and 4 were excellent in most evaluations. However, Comparative Examples 3 and 4
Was slightly inferior in some evaluations as compared with the recording materials of Examples 1 to 4. From this point as well, it can be seen that the recording materials of Examples 1 to 4 are very excellent in all evaluations.

Further, Comparative Examples 1 to 4 had a bad odor generated during production, but Examples 1 to 4 had a small odor.

[0059]

EFFECT OF THE INVENTION The recording material of the present invention shows almost no waviness due to fixing heat during copying, toner fixability, pencil and water-based ink writability, and pencil image erasability.
It satisfies performances such as solvent resistance (toner erasability). Further, the recording material of the present invention has very little odor during the manufacturing process.

Claims (3)

[Claims] 1. A recording material having a mat layer comprising a binder resin and a matting agent on both sides of a support, wherein 60% by weight or more of said binder resin is a silicone resin, and said matting agent is said binder resin. 5 to 75% by weight of the recording material. 2. A recording material, wherein the support according to claim 1 is a plastic film. 3. A recording material, characterized in that the support according to claim 1 is a plastic film on which both sides of Japanese paper or Western paper are laminated.