FLEXOGRAPHIC PRINTING PLATE
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United States of America Patent
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Oct 6, 2022
app pub date -
Jul 1, 2020
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Aug 23, 2019
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Abstract
A flexographic printing plate obtained from a flexographic printing plate precursor includes at least a support, a photosensitive resin layer and a heat-sensitive mask layer laminated in this order, wherein the composite elastic modulus of each dot is 30 to 80 Mpa and the composite elastic modulus of each solid-printed part is 5 to 15 MPa. A photosensitive resin composition constituting the photosensitive resin layer includes a polymer prepared by polymerizing a conjugated diene, an ethylenically unsaturated compound and a photopolymerization initiator, wherein the content of the photopolymerization initiator is 2 to 9% by mass, the ethylenically unsaturated compound includes a (meth)acrylate compound having a number average molecular weight of 100 to 600 in a content of 5 to 16% by mass, and the ratio of the mass of the photopolymerization initiator and the mass of the compound is within the range of 0.20 to 0.55.
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