Title:
FLEXOGRAPHIC PRINTING ORIGINAL PLATE
Document Type and Number:
WIPO Patent Application WO/2021/054225
Kind Code:
A1
Abstract:
The present invention provides: a flexographic printing original plate which is reduced in size and number of pinholes in a heat-sensitive mask layer by a simple process; and a flexographic printing plate which is obtained from this flexographic printing original plate, and which is almost free from defects due to pinholes. A flexographic printing original plate which is obtained by sequentially stacking at least (A) a supporting body, (B) a photosensitive resin layer, (C) a heat-sensitive mask layer and (D) a cover film, and which is characterized in that: a surface of the cover film (D), said surface being in contact with the heat-sensitive mask layer (C), has a surface energy of from 25.0 mN/m to 40.0 mN/m and a surface roughness (Ra) of from 0.01 μm to 0.2 μm; and (E) a protective layer which is formed from a polymer compound that is dispersible in a developer liquid is provided between the photosensitive resin layer (B) and the heat-sensitive mask layer (C).
Inventors:
YOSHIMOTO KAZUYA (JP)
Application Number:
PCT/JP2020/034149
Publication Date:
March 25, 2021
Filing Date:
September 09, 2020
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B41N1/12; B41M1/04; G03F7/00; G03F7/095
Domestic Patent References:
| WO2018088336A1 | 2018-05-17 |
Foreign References:
| JP2013114136A | 2013-06-10 | |||
| JP2005289041A | 2005-10-20 | |||
| JP2004317964A | 2004-11-11 | |||
| JP4610132B2 | 2011-01-12 | |||
| JP4200510B1 | 2008-12-24 | |||
| JPS5710961B2 | 1982-03-02 | |||
| JPS5525074B2 | 1980-07-03 | |||
| JPS6358523B2 | 1988-11-16 |
Other References:
See also references of EP 4032719A4
Attorney, Agent or Firm:
KAZAHAYA, Nobuaki et al. (JP)
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