| 摘要 |
PROBLEM TO BE SOLVED: To obtain an ethylenic copolymer cross-linked material which has low hardness and low repulsion elastic modulus and in which the bleeding amount of a plasticizer is small.SOLUTION: An ethylenic copolymer cross-linked material is obtained by cross-linking an ethylenic copolymer composition, obtained by blending 100 pts.mass of an ethylenic copolymer (X) and 500 pts.mass or more of a plasticizer (Y) to 100 pts.mass of the ethylenic copolymer (X). The ethylenic copolymer (X) is characterized in that the structural unit derived from ethylene [A] is in the range of 50-90 mol% based on 100 mol% of the whole structural unit of the copolymer (X); the structural unit derived from at least one kind of polyene and/or cyclic olefin [C] is in the range of 1.0-5.0 mol% based on 100 mol% of the whole structural unit of the copolymer (X); and the intrinsic viscosity [&eegr;] of the ethylenic copolymer (X), measured in a decalin solution having a temperature of 135°C, is in the range of 7.8-13.0 dl/g. The cross-linked material has a hardness (Asker C hardness measured according to SRIS0101) of 22 or less. |
