| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition with improved tribological characteristics to reduce morphological changes while it is in service, by making the composition include a mixture of an ethylene/α-olefin metallocene copolymer and styrene/diene block copolymer. SOLUTION: This composition contains (A) an ethylene/3-20C α-olefin metallocene copolymer (e.g. plastomer) and (B) a styrene/diene block copolymer containing 10 to 25 wt.% of styrene (e.g. styrene/butadiene/styrene copolymer), to cross-link the molecules. It is preferable to use the above composition which contains approximately 0.5 to 12.5 wt.% of styrene, and one having a compression set of 70% or less and preferably a durometer hardness of 40 to 60A is preferably used for medical instruments. |
