Patent ID: 8658263
Filing Date: 2014-02-25
Classification: B29C,B29K,C08G,C08J,D01D,D01F,D03D,D10B,H01L,Y10T

Abstract:
1. A shape-retaining film comprising an ethylene homopolymer or a ethylene/C 3-6 α-olefin copolymer having α-olefin unit content of less than 2 wt %, the ethylene homopolymer and ethylene/C 3-6 α-olefin copolymer each having a density of 950 kg/m 3 or more and a ratio of weight-average molecular weight (Mw) to number-average molecular weight (Mn) of 5 to 20, wherein the shape-retaining film has a tensile elasticity modulus of 16 to 50 GPa, and exhibits an angle of recovery from 90° bending of 8° or less or an angle of recovery from 180° bending of 65° or less, and the shape-retaining film has a surface roughness of Ra of 0.17 to 0.23 μm and surface projection interval of Sm of 50 to 180 μm.