| 摘要 |
PURPOSE:An acrylic fiber having high physical property in which tensile strength, Young's modulus and the product of Young's modulus and tensile strength are each not less than specific values and the elongation is not more than a specific value. CONSTITUTION:An acrylic fiber having >=8g/d tensile strength, >=140g/d Young's modulus, >=1800 product of tensile strength and Young's modulus and <=15% elongation. The fiber can be obtained by spinning a spinning dope of acrylonitrile-based polymer at >=4 discharge linear velocity ratio defined by the formula, washing the resultant span gelatinous filaments with water, drawing and dry heat-treating under tension or dry heat-drawing at the temperature within + or -30 deg.C of the maximum drawable temperature (preferably 180-250 deg.C) and then cooling under tension to give >=15 effective total draw ratio.
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