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Flexographic printing original plate and method for manufacturing flexographic printing plate

A technology of flexographic printing and original plate, applied in printing plate, printing, printing plate preparation, etc., can solve the problems of inflexibility of film, shallow relief depth, inability to form tiny dots, etc., and achieve excellent pinhole resistance and washability. High, excellent printing properties

Pending Publication Date: 2021-07-23
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In the case where there are pinholes in the infrared ablation layer, the photosensitive resin composition layer in contact with the pinholes will be exposed during relief exposure, so that an unwanted image will be formed, resulting in the following problem: it is impossible to form tiny dots, or shallow reliefs that form unwanted relief depths
[0022] However, the film made of polyvinyl alcohol resin has problems such as not being resistant to bending, and the film is prone to cracks and wrinkles.
Flexographic printing plates are required to be soft in nature, and there are problems when using polyvinyl alcohol resins such as the above

Method used

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  • Flexographic printing original plate and method for manufacturing flexographic printing plate
  • Flexographic printing original plate and method for manufacturing flexographic printing plate

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0302] (Synthesis of Hydrophilic Copolymer)

[0303] In a pressure-resistant reaction vessel equipped with a stirring device and a jacket for temperature adjustment, 125 parts by mass of water and (α-sulfo(1-nonylphenoxy)methyl-2- (2-Propyleneoxy)ethoxy-poly(oxy-1,2-ethanediyl) ammonium salt "ADEKAREASOAP" (manufactured by Asahi Denka Industries) 2 parts by mass, the inner temperature was raised to 80°C, respectively A monomer mixture containing 10 parts by mass of styrene, 60 parts by mass of butadiene, 23 parts by mass of butyl acrylate, 5 parts by mass of methacrylic acid, and 2 parts by mass of acrylic acid was added at a constant flow rate for 5 hours and 6 hours. An oily mixed solution of 2 parts by mass of dialkylmercaptan, and 28 parts by mass of water, 1.2 parts by mass of sodium persulfate, 0.2 parts by mass of sodium hydroxide, and (α-sulfo(1-nonylphenoxy) An aqueous solution of 2 parts by mass of an ammonium salt of methyl-2-(2-propenyloxy)ethoxy-poly(oxy-1,2-etha...

manufacture example 2

[0308] (Preparation of base film (support body))

[0309] As a solution for the adhesive layer coated on the support (base film), Tufprene 912 (manufactured by Asahi Kasei Co., Ltd., trade name) which is a block copolymer of styrene and 1,3-butadiene was used at 55 The ratio of parts by mass, the ratio of 38 parts by mass of paraffin oil (average carbon number 33, average molecular weight 470, density at 15° C. of 0.868), the ratio of 2.5 parts by mass of 1,9-nonanediol diacrylate, 2 , 2-dimethoxy-phenylacetophenone at a ratio of 1.5 parts by mass, EPOXY ESTER3000M (manufactured by Kyoeisha Chemical Co., Ltd., trade name) at a ratio of 3 parts by mass, and Balifast YELLOW 3150 (ORIENT CHEMICAL INDUSTRIES CO. ., LTD., trade name) was dissolved in toluene at a ratio of 1.5 parts by mass to obtain a solution with a solid content of 25%.

[0310] Then, it was coated on one side of a polyester film with a thickness of 100 μm using a knife coater so that the UV transmittance was 10...

manufacture example 3

[0313] (Fabrication of thin film with infrared ablation layer)

[0314] 65% by mass of Asaflex 810 (manufactured by Asahi Kasei Co., Ltd., trade name) which is a block copolymer of styrene and 1,3-butadiene, and 35% by mass of carbon black which is an infrared sensitive substance were kneaded by a kneader, After being cut into pellets, the ratio of 90 parts by mass of the pellets and 10 parts by mass of 1,6-hexanediol adipate was dissolved in ethyl acetate / butyl acetate / propylene glycol monomethyl ether by ultrasonic waves. Acetate = 50 / 30 / 20 mass ratio of the mixed solvent produced to produce a solid content of 12 mass % of the homogeneous solution.

[0315] Then apply the solution at a dry coating amount of 4 to 5 g / m 2 The method was coated on a polyester film with a thickness of 100 μm as a cover sheet using a knife coater, and dried at 80° C. for 1 minute to obtain a film with an ultraviolet shielding layer (infrared ablation layer) that can be cut by infrared rays.

[...

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Abstract

Provided is a flexographic printing original plate obtained by sequentially laminating at least a support, a photosensitive resin composition layer, an intermediate layer and an infrared ablation layer, wherein the intermediate layer includes a hydrophilic resin (A) and an inorganic layered compound (B), and the thickness of the intermediate layer is 2-30 [mu]m.

Description

technical field [0001] The invention relates to a flexographic printing original plate and a method for manufacturing the flexographic printing plate. Background technique [0002] Flexographic printing is a type of letterpress printing, and flexographic printing plates use soft materials such as rubber and synthetic resin, so they have the advantage of being applicable to various printed materials. [0003] As a method of manufacturing flexographic printing plates used in flexographic printing, conventionally, there have been methods using negative plate making; and computer plate making technology (hereinafter referred to as CTP) that uses information processed on a computer to directly draw on a printing plate to create a relief. technology) method. [0004] In the method using the above-mentioned CTP technology, the manufacturing process of the negative film is not required, and the cost and the time required for the production of the negative film can be reduced. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/00
CPCG03F7/11G03F7/202G03F7/027G03F7/092B41C1/05B41N1/006
Inventor 藤木优壮小川博司斋藤秀夫
Owner ASAHI KASEI KK
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