Compressible printing plates and manufacturing process therefor

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates

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430325, 430327, 4302711, G03F 7095, G03F 716

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active

057503150

ABSTRACT:
A compressible printing plate is prepared by casting liquid photopolymerizable resin directly onto a compressible material having open cells on its surface. The photopolymerizable resin is incompletely cured by exposure to actinic radiation, preferably in the absence of a coverfilm covering the photopolymerizable resin. A further layer of photopolymerizable resin is then cast onto the incompletely cured resin, and the whole exposed to actinic radiation through an image-bearing transparency. A release composition may be placed between the image-bearing transparency and the photopolymerizable resin to provide for decreased adhesion therebetween. After development, an image-bearing laminate suitable as a printing plate for flexographic printing is obtained. The printing plate achieves excellent short and long term adhesion between the compressible layer and the photopolymer plate, without the necessity of a tie layer or adhesive therebetween.

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patent: 5006447 (1991-04-01), Umeda et al.
patent: 5629052 (1997-05-01), Trokhan et al.

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