| 摘要 |
PROBLEM TO BE SOLVED: To provide a profile extrusion molding rubber compound excellent in a ratio of residual compressive stress which is an index of shape retention characteristics and BIT balance which is an index of kneadability, and having dynamic characteristics equal to those of vulcanized rubber obtained by using conventional ethylene-α-olefin-nonconjugated diene copolymer. SOLUTION: The profile extrusion molding rubber compound is prepared by using the ethylene-α-olefin-nonconjugated diene copolymer having 20-30 Az/An ratio wherein Az expresses a Z-average molecular chain length measured by gel permeation chromatography (GPC) and An expresses a number-average molecular length,≥5 Aw/An ratio wherein Aw expresses a weight average molecular length, a single peak or double peak molecular weight structure having the peak or peaks in a range of 3.8<LogAw<4.5, and a viscosity measured by ML viscometer in the range of 60<ML<SB>1+4</SB>, 121°C<160. COPYRIGHT: (C)2005,JPO&NCIPI
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