JPS5855499B2 - density thin nut centa - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing toner for a dry or wet developer used in an electrophotographic printing method.

Conventionally, methods for printing designs on fabrics include roller printing, screen printing, rotary screen printing, and the like.

However, these conventional printing methods require (a) long preparations before production; print production is based on make-to-stock production; however, if the pattern produced is not popular, large amounts of inventory may be required; Therefore, print production is highly speculative.

(b) Even if we receive information from the market that a certain pattern will sell well, we cannot immediately produce that pattern.

There were drawbacks such as.

A transfer printing method has been considered as a method to improve this risk, but (a) this printing method is also about four times more expensive than the above-mentioned printing method.

(b) Cannot be applied to materials other than polyester fabrics.

(−→ The pattern is limited by the transfer master paper provided by the printing company.

There are drawbacks such as.

In order to solve the above-mentioned drawbacks, electrophotographic printing methods have been developed in recent years.

Electrophotographic printing is a process in which an electrostatic latent image corresponding to a pattern is formed using various conventionally known electrophotographic methods, such as the Carlson method, electrofax method, or Canon NP method, and this is visualized using electrophotographic printing toner. This is a method of printing designs onto fabrics by transferring the image onto fabrics, steaming, soaping, and drying.

The printing toner used in this electrophotographic printing method chemically dyes fabrics, and requires good image clarity, washing fastness, heat fastness against ironing, sunlight fastness, etc., so it is difficult to use conventional paper. It is not possible to simply transfer electrophotographic toner, which is transferred and physically or electrically adhered to a surface such as a photoreceptor, to another use.

In addition, in the electrophotographic printing method, after the printing toner is transferred to the fabric, steaming, saw pinking, and drying processes are performed to dye with the dye contained in the toner and to remove the resin that makes up the toner. It is compositionally different from toner that is transferred and fixed onto conventional paper.

In addition, a natural or synthetic vehicle resin and a water-soluble dye are used in the printing toner, but since the dye is used to dye fabrics, the dye used differs depending on the material of the fabric.

For example, typical examples include disperse dyes for polyester fibers, cationic dyes for acrylic fibers, acid dyes for polyamide fibers or wool fibers, and reactive dyes, direct dyes, and sulfur dyes for cellulose or silk fibers.

In this way, the dye used in the printing toner must be changed depending on the type of fabric to be transferred, and the dye must also be changed depending on the color to be dyed.

Therefore, it is quite difficult to control the chargeability of printing toners using various dyes.

The present invention solves various problems in textile toners as described above.

The present invention provides a printing toner with good dyeability and suitable for electrophotographic printing methods that involve steaming, soaping, etc.

Furthermore, the present invention provides a printing toner that exhibits uniform and constant chargeability even when the dye in the toner is varied.

That is, the present invention is characterized in that the toner contains 5 to 50 parts of an ethylene-methacrylic acid copolymer or a polymer obtained by reacting a metal to an ethylene-methacrylic acid copolymer and 5 to 20 parts of a dye based on 100 parts of the vehicle resin of the toner. It is used in electrophotographic printing toner.

Preferred representative examples of the vehicle resin used in the printing toner of the present invention include, for example, 4-vinylpyridine resin, 4-vinylpyridine resin,
-vinylpyridine-acrylic copolymer, acrylic resin,
Many synthetic resins such as epoxy resins, styrene resins, polyamine sulfonic acid resins, xylene resins, coumaron indene resins, maleic anhydride resins, copolymers of maleic anhydride, vinyl chloride resins, polybutene resins, copal,
Many natural resins such as shrug, rosin, and giltstone can be used alone or in combination.

5 to 50 parts, preferably 10 to 40 parts of an ethylene-methacrylic acid copolymer or a polymer containing a metal cation thereof may be mixed with 100 parts of these vehicle resins.

If less than 5 parts, the effect is small, and if more than 50 parts are mixed, pulverization becomes difficult, which is not preferred.

Furthermore, when the proportion of ethylene in the ethylene-methacrylic acid copolymer increases, it tends to become negatively charged, and when the proportion of methacrylic acid increases, it tends to become positively charged.

Furthermore, Na,
When a metal cation such as Zn is applied, the metal is bonded between long chain molecules and the negatively charged property becomes strong, so that it can be particularly preferably used in a magnetic brush development method using iron powder as a carrier.

Next, the dye used in the electrophotographic printing toner of the present invention is generally a dye used for dyeing fabrics, but a dye suitable for the type of fabric to be transfer printed should be used.

Typical specific examples of dyes generally used in textile toners include Resolin Prill Blue PRL, Resolin Yellow PGG, Resolin Pink PRR, Resolin Green PB (manufactured by Bayer), and Sumikron Blue S-3.
RF, Skron Red E-EBL Skron Yellow E-4GL (manufactured by Sumitomo Chemical) Diamond Yellow HG-8E, Diamond Red BN-8E (manufactured by Mitsubishi Chemical), Kayalon Polyester Yellow YL-8
E, Kayarasu Spura Blue BRL200.7” Long On Red H2B, Prodione Blue H-3R (all manufactured by Nippon Kayaku), Revafix Golden Yellow PR
1 Revafix Pril Red P-B, Revafix Frill Orange P-GR (over buyer W) Sumifix Yellow GR8, Sumifix Frill Red BS
, Sumifix Pril Blue RB (manufactured by Sumitomo Chemical) Diamond Mirror Brown 3G, Diamirror Prill Blue B1 Diamirror Prill Red BB (manufactured by Mitsubishi Kasei) Remazol Red B Lumazol Pur-3R1 Remazol Yellow GNL Lumazol Prill Green 6B (
Cibacron Pril Yellow (all manufactured by Hoechst) and Cibaclon Pril Red 4GE (all manufactured by Ciba Geigy) can be preferably used.

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples, but these are not intended to limit the present invention in any way.

Example 1 An electrophotographic printing toner was produced using the following recipe.

Vinylpyridine resin (manufactured by Organic Synthetic Chemical Co., Ltd., trade name E-48, molecular weight 100 parts 250
000) Ethylene-methacrylic acid copolymer (containing Zn) (manufactured by DuPont, trade name: 20 parts phosphorus A)
1554) Direct dye (manufactured by Nippon Kayaku Co., Ltd., trade name Kaya □.

sound. (Russupura Blue BRL 200) The above-mentioned molten mixture was pulverized and classified into 5 to 20 microns to obtain an electrophotographic printing toner.

Next, carrier iron powder (product name: EFV-300, manufactured by Nippon Tetsuko Co., Ltd.) l OOP was mixed with 20 g of this toner to prepare an electrophotographic textile developer.

In this case, the toner was negatively charged.

Next, a dry transfer type electronic copying machine (manufactured by Canon, product name NP
1100) with the above developer and transfer the printed toner image onto a broad fabric (white cotton), followed by steaming treatment at 100°C for 1 minute and soaping treatment with a 5% surfactant aqueous solution. It was printed in blue on a broad base by sequentially rubbing and drying.

Example 2 The printing toner obtained in Example 1 was made into a paste using a mixed solvent of cyclohexanone/toluene/butyl acetate, and this was dispersed in an isoparaffinic hydrocarbon liquid (trade name, Isopar H1 manufactured by Etsu Standard Petroleum). An electrophotographic printing liquid developer was obtained.

Using this developer, a wet transfer type electronic copying machine (product name NP-
L7 (manufactured by Canon) was used to print out the image, and a broad area (
After transferring to white cotton, the same process as in Example 1 was carried out to obtain blue printing.

Example 3 Acrylic resin (product name, Carboset □.

o-sound 1525, manufactured by Gutdrich) Ethylene-methacrylic acid copolymer (contains Na) (manufactured by DuPont, trade name: 40 parts - Rin A1555) Direct dye (manufactured by Nippon Kayaku, trade name: Kaya □ 5 parts Rauspura Blue BRL200 ) Using this recipe and carrying out the same procedure as in Example 1, blue printing was possible.

Furthermore, the same procedure as in Example 2 was carried out, and blue printing was also possible.

Example 4 Ethylene-acrylic acid polymer (manufactured by □oo parts name: Taxonso Chemical Co., Ltd.) Ethylene-methacrylic acid copolymer (manufactured by Allied Chemical Co., Ltd., trade name #540) 10 parts Direct dye (manufactured by Nippon Kayaku Co., Ltd., trade name: Kaya.

(Burasupura Blue BRL 200) A printing toner was produced using this recipe, and the other procedures were carried out in the same manner as in Example 1, whereby blue printing was achieved.

The printing toner of this example was positively charged.

Example 5 Petroleum resin (trade name, Alcon P 1oo sound B12
5, manufactured by Arayo Forestry Chemical Co., Ltd.) Ethylene-methacrylic acid copolymer (containing Na) (trade name, Surlyn A 10 parts 1
555, manufactured by DuPont) Reactive dye (manufactured by Nippon Kayaku, trade name: Pron, Glue-on H Yellow H-5G) A printing toner was prepared using this recipe, and the rest was carried out in the same manner as in Example 1, and printing in yellow was achieved.

Example 6 In Example 1, the dyes were Prodione Red H-2B,
Mikasion Blue 2R (manufactured by Nippon Kayaku) Revafix Golden Yellow P-R, Revafix Frill Orange P-GR (manufactured by Bayer) Sumifix Yellow GR8, Sumifix Pril Red BS (
Diamirror Brown 3G (manufactured by Sumitomo Chemical), Diamirror Prilpur B (manufactured by Mitsubishi Kasei), Remazol Red B, Remazol Prill Green 6B (manufactured by Hoechst), Cibacron Pril Red 4GE (manufactured by Civer Geigy), Kayalon Polyester Yellow YL-8E (manufactured by Nippon Kayaku), Resolin Pink PRR, Resolin Green, Resolin Yellow PRR (manufactured by Bayer), Sumikron Blue S-3RF 1 Sumikron Red E-
EBL (manufactured by Sumitomo Chemical), Diamonds Yellow H
G-8E (manufactured by Mitsubishi Kasei) was used in the same manner, and clear printing was achieved in all cases.

Experimental data for each example and comparative example (in which only the ethylene-methacrylic acid copolymer was removed in each example) is shown below.

As described above, by adding the ethylene-methacrylic acid copolymer to the printing toner, good charging properties can be obtained even if various dyes are used, and clear printed images can be obtained.

Claims (1)

[Claims] 1. An electrophotographic printing toner containing 5 to 50 parts of an ethylene-methacrylic acid copolymer or a polymer obtained by treating an ethylene-methacrylic acid copolymer with a metal and 5 to 20 parts of a dye, per 100 parts of a vehicle resin.