# US 2010/0167202 A1 · Photosensitive flexographic printing original plate

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- Number: US 2010/0167202 A1
- Document ID: US20100167202A1
- Status: Published application
- Kind: A1
- Application number: 12/600,937
- Filed: 2008-12-05
- Published: 2010-07-01
- Earliest claimed: 2008-06-11
- Assignees: Toyo Boseki Kabushiki Kaisha
- Inventors: Kazuya Yoshimoto; Tetsuma Kawakami; Yasuyuki Munekuni; Keiichi Motoi; Yukimi Yawata; Toru Wada
- Web page: https://patentgrep.com/patent/US20100167202A1

## CPC

- G03F 7/202: {Masking pattern being obtained by thermal means, e.g. laser ablation}
- G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G)

## Abstract

The present invention provides a photosensitive flexographic printing original plate provided with a heat sensitive mask layer having high light blocking effect and durability yet prepared as a thin film. A photosensitive flexographic printing original plate including at least (A) a supporting member, (B) a photosensitive resin layer, (C) a protective layer and (D) a heat sensitive mask layer that are successively laminated, wherein the heat sensitive mask layer (D) contains carbon black and, as a dispersion binder therefor, a butyral resin as well as polyamide containing polar group selected from the group consisting of polyamide containing a tertiary amine group, polyamide containing a quaternary ammonium salt group, polyamide containing an ether group and polyamide containing a sulfonic group.

## Claims

### Claim 1

A photosensitive flexographic printing original plate including at least (A) a supporting member, (B) a photosensitive resin layer, (C) a protective layer and (D) a heat sensitive mask layer that are successively laminated, wherein the heat sensitive mask layer (D) contains carbon black and, as a dispersion binder therefor, a butyral resin as well as polyamide containing polar group selected from the group consisting of polyamide containing a tertiary amine group, polyamide containing a quaternary ammonium salt group, polyamide containing an ether group and polyamide containing a sulfonic group.

### Claim 2 (depends on 1)

The photosensitive flexographic printing original plate according to claim 1, wherein the butyral resin and the polyamide containing polar group, have a weight ratio in a range from 20 to 80:20 to 80.

### Claim 3 (depends on 1, 2)

The photosensitive flexographic printing original plate according to claim 1 or 2, wherein the carbon black and dispersion binder have a weight ration in a range from 25 to 50:20 to 75.