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Are superior in resistance to wet heat and heatproof aging Characteristic the polyvinylalcohol fiber and its manufacturing method
Are superior in resistance to wet heat and heatproof aging Characteristic the polyvinylalcohol fiber and its manufacturing method
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机译:耐湿热,耐热老化性优异。聚乙烯醇纤维及其制造方法
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摘要
PURPOSE: To easily obtain the subject fiber having excellent moist-heat resistance and dry-heat deterioration resistance and suitable as a rubber-reinforcing material, etc., by applying an antioxidant to the inner part of a PVA fiber using a specific method and cross-linking exclusively the surface part of the fiber using a specific method. ;CONSTITUTION: A PVA polymer having a viscosity-average polymerization degree of ≥3,000 is dissolved in a solvent and the solution is extruded through a nozzle to form a fiber. The fiber is treated with an extraction bath to extract the solvent and an antioxidant is applied to the fiber within a stage from the spinning dope of PVA to the extraction bath. The fiber is dried to hold the antioxidant in an amount of 0.2-3wt.% in the fiber and on the surface of the fiber. Subsequently, a crosslinking agent is applied to the surface of the fiber within a stage before the drying process to immediately before the dry-hot drawing and the fiber is subjected to dry drawing at a total draw ratio of ≥16 to obtain the objective fiber having a gel elastic modulus of 0.1×10-2 to 1.5×10-2g/d, a hot-water breakage temperature of ≥150°C, a yarn strength of ≥15g/d and a strength retention of ≥50% after the heat-treatment at 160°C for 24hr.;COPYRIGHT: (C)1993,JPO&Japio
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