RELIEF PRINTING ORIGINAL PLATE FOR ROTARY LETTERPRESS PRINTING
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United States of America Patent
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Issued Date -
Feb 28, 2019
app pub date -
Mar 7, 2017
filing date -
Mar 29, 2016
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Abstract
A relief printing original plate for rotary letterpress printing wherein at least an adhesive layer, a photosensitive resin layer and a cover film are successively layered on a support, wherein the photosensitive resin layer contains at least a synthetic rubber-based polymer, a photopolymerizable unsaturated compound and a photopolymerization initiator, and Shore A hardness of a surface of the photosensitive resin layer after photo-curing is 80 to 95. Preferably, the synthetic rubber-based polymer is a hydrophobic polymer obtained from a water-dispersible latex having a weight-average gelation degree of 50 to 80%. Preferably, the photosensitive resin layer contains 20 to 70% by mass of the synthetic rubber-based polymer. The relief printing original plate is suitably used for a rotary printing machine of a center drum type.
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