| 摘要 |
PROBLEM TO BE SOLVED: To provide an extrusion material using an ethylene/α-olefin/non-conjugated diene copolymer rubber composition that is excellent in roll processability of a compound and shape retention properties of a vulcanized rubber and also has good compression set properties. SOLUTION: The vulcanizable rubber composition for the extrusion material comprises the following components (A)-(E): (A) a specific ethylene/α-olefin/non-conjugated diene copolymer rubber having high Mooney viscosity, (B) a specific ethylene/α-olefin/non-conjugated diene copolymer rubber having low Mooney viscosity, (C) carbon black, (D) a processing oil and (E) a vulcanizing agent, wherein the weight ratio of the component (A) to the component (B) is 80/20-50/50; and when a sample in the form of a ribbon is molded from the rubber composition and the heating is effected by means of hot air at 220°C for 5 minutes, the displacement in the vertical direction of the sample after heating relative to the length before heating is within 20 mm. COPYRIGHT: (C)2007,JPO&INPIT
|
