Relief printing plates and laminates for their manufacture

Details Relief printing plates and laminates for their manufacture Relief printing plates and laminates for their manufacture

G - Physics

03

C

96/189

G03C 1/76 (2006.01) G03F 7/11 (2006.01)

Patent

CA 1039100

ABSTRACT OF THE DISCLOSURE: The invention relates to relief plates for flexographic printing comprising a relatively soft elastomeric base (U) having a modulus of elasticity of from 10 to 200 kg/cm2 and a thickness of from 0,5 to 6 mm and, firmly bonded thereto, a thin, relatively hard, difficultly soluble intermediate layer Z hav- ing a modulus of elasticity of from 1 x 103 to 2.1 x 106 kg/cm2 and a thickness of from 5 to 500µ and, firmly bonded to said interme- diate layer Z, a relief layer P' consisting of a photo-crosslinked elastomeric mixture having a modulus of elasticity of from 30 to 2,000 kg/cm and a thickness of from 200 to 300µ, the modulus of elasticity of the photo-crosslinked relief layer P' being the same as or higher than that of the base U and the neutral surface of the relief plate lying in or near the intermediate layer Z. The inven- tion also relates to photosensitive laminates for the production of such plates.

212086

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