Patent ID: 9657163
Date: 2017-05-23
CPC Classifications: B29C,B29K,B29L,C08L

Claim:
1. A shape retaining material, which is a fibrous, band-like, or sheet-like stretched formed material comprising 100 parts by weight of a high-density polyethylene resin having a weight-average molecular weight of 100,000 to 500,000 Daltons and a density of 0.945 to 0.960 g/cm3 and 3 to 50 parts by weight of an ethylene-α-olefin copolymer obtained by copolymerizing ethylene with an α-olefin having 4 to 10 carbon atoms, the copolymer having a density of 0.935 to 0.960 g/cm3, the difference in density between the copolymer and the high-density polyethylene resin being ±0.020 g/cm3 or less, wherein the material shows, after being bent at an angle of 180 degrees in TD, held in the bent state for 1 minute, released, and left for 5 minutes after the release, a return angle of 15 degrees or less; and shows, after being bent at an angle of 180 degrees in MD, held in the bent state for 1 minute, released, and left for 5 minutes after the release, a return angle of 25 degrees or less.