Flexographic printing original plate

Patent metadata

Field	Value
Publication number	US-12397574-B2
Application number	US-202318297660-A
Country	US
Kind code	B2
Filing date	Apr 10, 2023
Priority date	Dec 23, 2020
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

The disclosure provides a flexographic printing original plate which comprises an adhesive layer that exhibits excellent solvent resistance and excellent adhesion to a supporting body. The disclosure provides a flexographic printing original plate 10 which sequentially comprises, on a surface of a supporting body 12, an elastic layer 16 and an adhesive layer 14, wherein the supporting body 12 contains a polyester resin and the adhesive layer 14 contains the components (a), (b) and (c) described below. (a) a polyester resin (b) an isocyanate compound (c) a xylene resin which has a melting point or softening point of 100° C. or less.

First claim

What is claimed is:

1. A flexographic printing original plate, sequentially comprising a photosensitive resin layer and an adhesive layer on a surface of a supporting body,
wherein the supporting body contains a polyester resin, and
the adhesive layer contains the following components (a), (b), and (c):
(a) a polyester resin
(b) a trifunctional isocyanate compound having an isocyanurate skeleton
(c) 10 parts by mass or more and 30 parts by mass or less of a xylene-based resin with respect to 100 parts by mass of the component (a), wherein the xylene-based resin has a melting point of 25° C. or less, and the xylene-based resin does not have a phenolic hydroxyl group and has an alcoholic hydroxyl group,
wherein the polyester resin of the component (a) has a glass transition temperature of 20° C. or less, and
a range of a content ratio of the component (c) to the component (b) is between 0.4 and 4.3.

2. The flexographic printing original plate according to claim 1 , wherein the xylene-based resin of the component (c) has one hydroxyl group per molecular chain.

3. The flexographic printing original plate according to claim 1 , wherein the adhesive layer has a thickness of 10 μm or more.

4. The flexographic printing original plate according to claim 1 , wherein the photosensitive resin layer contains a water-dispersed latex.

Assignees

• Sumitomo Riko Co Ltd

Inventors

• Inoue Daisuke
• Yamada Yutaro
• Hashimoto Hideyuki

Classifications

• G03F7/2012

  using liquid photohardening compositions, e.g. for the production of reliefs such as flexographic plates or stamps · CPC title

• G03F7/033

  the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers · CPC title

• B41F5/24

  for flexographic printing · CPC title

• B32B27/08

  of synthetic resin · CPC title

• B32B2255/26

  Polymeric coating · CPC title