| 摘要 |
PURPOSE:To obtain an acrylic fiber-reinforced rubber composition excellent in strength, heat and oil resistance by blending a diene-based rubber with carbon black and specific acrylic fiber in a specified proportion. CONSTITUTION:An acrylic fiber-reinforced rubber composition, obtained by blending (A) 50-80wt.% diene-based rubber with (B) 1-30wt.% carbon black (e.g. furnace black for rubber), (C) 5-40wt.% acrylic fiber having >=16 shape factor defined by the formula, shape factor = (perimeter)<2>/cross-sectional area, preferably containing >=90wt.% acrylonitrile units and having >=10g/d tensile strength, 0.1-10mm length of short fiber, 0.1-10d size of the short fiber ad 10-1000 aspect ratio and, as necessary, a vulcanizing agent, acceleration assistant, filler, softener, etc., and having >=400kg/cm<2> tensile strength. |
