Compressible photopolymer printing plate including a layer...

Details Compressible photopolymer printing plate including a layer... Compressible photopolymer printing plate including a layer...

G - Physics

03

C

96/182, 96/189

G03C 1/76 (2006.01) B32B 5/18 (2006.01) B41N 1/12 (2006.01) G03F 7/09 (2006.01)

Patent

CA 1168502

-12- ABSTRACT A layered sheet construction suitable after processing for use as a relief printing plate is provided. The sheet is made of a photosensitive layer comprising an elastomeric polymer, between about 5 and 30 phr of an ethylencially unsaturated compound and between 0.1 and 5 phr of a photoinitiator activatable by actinic radiation; a base layer immediately adjacent to said photosensitive layer capable of supporting a relief image after processing; having the same or a different composition than said photosensitive layer. The sheet is bonded to an open or closed cell foam layer having a thickness between about 0.010 inch and 0.250 inch. Said foam has a recovery rate of at least 80%, a compression value between about 0 . 003 inch and 0 . 030 inch and a density of between about 2 to 50 lbs/ft3 and is bonded to a dimensionally stable supporting layer.

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