Supercharge Your Innovation With Domain-Expert AI Agents!

Photosensitive resin composition for CTP flexographic printing original plates and printing original plate obtained from same

A technology of photosensitive resin and flexographic printing, which is applied in the field of photosensitive resin composition, and can solve problems such as uneven transfer of ink, easy deformation of the shape of the top area of ​​the relief, and blurred printing, etc.

Inactive Publication Date: 2014-12-24
TOYOBO CO LTD
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Patent Document 1 can provide a photosensitive flexographic printing original plate with excellent laser etching performance, it causes blurred printing, which is a negative system that cannot be blamed
First, the etch layer formed for CTP is easily deformed compared to the negative
Therefore, there is a disadvantage that the shape of the relief top area is easily deformed
Accordingly, in printing sinks, uneven transfer of ink (printing blur) caused by such raised edges is prone to occur.
[0004] In addition, in the photosensitive resin composition of Patent Document 1 used for a CTP photosensitive flexographic printing original plate, there are disadvantages of insufficient mechanical strength and insufficient printing durability at the time of printing, so that there is a need for improvement thereof
[0005] Thus, conventional CTP flexographic printing precursors using water-developable photosensitive resin compositions cannot meet the requirements for solving laser etching performance, water developability, printing durability, and printing blurring as a result of the shape change of the top of the relief plate.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Photosensitive resin composition for CTP flexographic printing original plates and printing original plate obtained from same
  • Photosensitive resin composition for CTP flexographic printing original plates and printing original plate obtained from same
  • Photosensitive resin composition for CTP flexographic printing original plates and printing original plate obtained from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A

[0063] Butadiene latex (Nippol LX 111NF, manufactured by Nippon Zeon Co., Ltd.) (45 parts by mass (solid system)) and 10 parts by mass (solid system) of acrylonitrile-butadiene latex (Nippol SX 1503, manufactured by Nippon Zeon Co., Ltd.) As component (A); 12 parts by mass (solid system) of a hydrophilic polymer (PFT-3 manufactured by Kyoeisha Chemical Co., Ltd.) as component (B); 12 parts by mass of oligobutadiene acrylate ( ABU-4 manufactured by Kyoeisha Co., Ltd.) as component (C-1), 7.5 parts by mass of glycol monomethacrylate (G101P manufactured by Kyoei Chemical Co., Ltd.) as component (C-2), and 7.5 Parts by mass of lauryl methacrylate as component (C-3) (ie they are component (C)); 0.7 parts by mass of photopolymerizable initiator as component (D); 0.03 parts by mass of terephthalic Phenol monoethyl ether as a polymerization inhibitor; and 0.04 parts by mass of a carboxylate-type copolymer as other additives were mixed in a container together with 15 parts by mass of t...

Embodiment 2A-6A and comparative example 1A-6A

[0065] As for Examples 2A-6A and Comparative Examples 1A-6A, the photosensitive resin composition and resin master plate were prepared and evaluated in the same manner as in Example 1A, except that components (C-2) and (C-3) were as shown in the table 1 make changes other than indicated. Details of the photosensitive resin composition (only for component (C)) and evaluation results are shown in Table 1.

[0066]

[0067]

[0068] As apparent from the results in Table 1, the products using the photosensitive resin compositions of Examples 1A-6A exhibited excellent and well-balanced cupping properties, peelability of cover films, and resistance to heat-sensitive masking layers (coating layers). sex.

Embodiment 1B

[0070] Polybutadiene latex (Nippol LX 111 NF, manufactured by Nippon Zeon Co., Ltd.) (42 parts by mass (solid system)) and 8 parts by mass (solid system) of acrylonitrile-butadiene copolymer latex (Nippol SX 1503, Nippon Zeon Co., Ltd.) as component (A), 5 parts by mass (solid system) of BR rubber (Nippol BR 1220, manufactured by Nippon Zeon Co., Ltd.) as component (E) and 80 parts by mass of toluene were heated at 60° C. to prepare A liquid in which rubber is dissolved. Let it cool down to room temperature. 8 parts by mass (solid system) of a hydrophilic polymer (PFT-4 manufactured by Kyoeisha Chemical Co., Ltd.) as component (B), 20 parts by mass of oligobutadiene acrylate (Kyoeisha Chemical Co., Ltd.) were added thereto. Co., Ltd. manufactured ABU-4) as component (C-1), 5 parts by mass of glycol dimethacrylate (G 101P manufactured by Kyoeisha Chemical Co., Ltd.) as component (C-2), 5 parts by mass Parts by mass of lauryl methacrylate and 5 parts by mass of trimethylolprop...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
weight-average molecular weightaaaaaaaaaa
number average molecular weightaaaaaaaaaa
molecular weightaaaaaaaaaa
Login to View More

Abstract

Provided is a CTP photosensitive flexographic printing original plate which is free from the generation of thin spots in print, while maintaining the printing durability, image reproducibility and developability of conventional flexographic printing original plates. The present invention is a photosensitive resin composition which contains at least (A) a hydrophobic polymer that is obtained from a water-dispersed latex, (B) a hydrophilic polymer, (C) a photopolymerizable unsaturated compound, (D) a photopolymerization initiator, and if necessary (E) a rubber. This photosensitive resin composition is characterized in that the photopolymerizable unsaturated compound (C) is formed of (C-1) a photopolymerizable oligomer that does not contain a hydroxyl group, (C-2) a hydroxyl group-containing photopolymerizable monomer that has a pentaerythritol skeleton, a dipentaerythritol skeleton or a glycerin skeleton, and if necessary (C-3) a photopolymerizable monomer that does not contain a hydroxyl group. It is preferable that the content of the hydroxyl group-containing photopolymerizable monomer (C-2) is 1-20% by mass of the photosensitive resin composition, and the content of the rubber (E) is 0.5-15% by mass of the photosensitive resin composition.

Description

technical field [0001] The present invention relates to a photosensitive resin composition for the manufacture of flexographic printing plates according to computer plate-making technology Background technique [0002] In recent years, in the field of flexographic printing, a CTP technique known as a digital image forming technique has been widely used as a conventional technique. The CTP technology is a method in which information processed on a computer is directly output to a printing plate to obtain a concave / convex pattern forming a relief. This technique eliminates the necessity of a negative film manufacturing step, whereby the cost and the time required for forming the negative film can be reduced. [0003] As for the CTP photosensitive flexographic printing original plate, there has been proposed a water-developable flexographic printing original plate having such a configuration that a protective layer (barrier layer) is formed on the photosensitive resin layer an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/00G03F7/027
CPCG03F7/027G03F7/033G03F7/24B41N1/12
Inventor 山田裕登八和田雪美芳本和也
Owner TOYOBO CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com