| 摘要 |
A mandrel suitable for use in the production of a rubber hose formed from a composition comprising: (i) at least one member selected from the group consisting of (A) an ethylene-alpha-olefin random copolymer having an ethylene content of 10 to 95 mol % and a degree of crystallinity, based on X-ray determination, of 0 to 20%, (B) a propylene - C4 to C10 alpha-olefin random copolymer having a propylene content of 50 to 80 mol % and a crystal fusion heat amount, determined by a differential scanning calorimeter, of 0 to 80 Joule/g, and (C) an oligomer having the general formula: <IMAGE> (I) wherein n and p are independently zero or an integer, m is zero or 1, and R is <IMAGE> and (ii) 98% to 30% by weight of a 4-methyl-1-pentene polymer, wherein the weight ratio of the component (i) to the component (ii) is from 2:98 to 70:30. This mandrel has excellent dimensional stability, durability, heat resistance, and releasability. |
