Patent ID: 9074057
Filing Date: 2015-07-07
Classification: B32B,C08J,C08L,Y10T

Abstract:
1. A flexible printing film having a thickness of 50 to 500 μm and produced by molding a thermoplastic resin composition (I) comprising 100 parts by mass in total of a mixed resin comprising 25 to 75% by mass of a rubber-modified styrene-based resin (A) and 25 to 75% by mass of a polyamide-based resin (B), the component (A) comprising a graft copolymer (A1) obtained by polymerizing a vinyl-based monomer (b1) in the presence of a rubber polymer (a), or a mixture of the graft copolymer (A1) and a (co)polymer (A2) of a vinyl-based monomer (b2); the vinyl-based monomer (b1) and the vinyl-based monomer (b2) each comprising an aromatic vinyl compound and a cyanided vinyl compound as essential monomer components; at least one of the vinyl-based monomer (b1) and the vinyl-based monomer (b2) further comprising at least one functional group-containing vinyl-based monomer selected from the group consisting of a hydroxyl group-containing unsaturated compound, an epoxy group-containing unsaturated compound, a substituted or unsubstituted amino group-containing unsaturated compound, a carboxyl group-containing unsaturated compound, an acid anhydride group-containing unsaturated compound and an oxazoline group-containing unsaturated compound; a content of the functional group-containing vinyl-based monomer in the component (A) being 0.1 to 1.2% by mass based on 100% by mass of a whole amount of the component (A); the component (A) comprising an acetone-soluble component having an intrinsic viscosity of 0.15 to 1.5 dL/g as measured in methyl ethyl ketone at 30° C.; and the thermoplastic resin composition (I) comprising the rubber polymer (a) in an amount of 5 to 30 parts by mass based on 100 parts by mass of a total amount of the components (A) and (B), wherein the flexible film having an elongation ratio (MD) under heating 10 s (130° C.) of not more than 3.8 measured by a method that the film, before being subjected to drawdown-printing, was cut into a specimen having a width of 1 inch and a length of 300 mm, the thus prepared test specimen on which a load of 500 g is suspended is allowed to stand in a constant temperature oven maintained at 130° C. for 10 sec to measure an elongation (L1) thereof relative to a length (L0) of 100 mm, the test specimen as measured before the standing test, and the elongation ratio under heating is calculated from the formula: L1/L0×100 (%).