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CONTINUOUS FUSION SPINNING PROCESS FOR SIMULTANEOUS STRETCHING OF YARN HIGH PERFORMANCE POLYESTER MULTIFILAMENTS
CONTINUOUS FUSION SPINNING PROCESS FOR SIMULTANEOUS STRETCHING OF YARN HIGH PERFORMANCE POLYESTER MULTIFILAMENTS
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机译:连续拉伸纺丝过程中高性能涤纶复丝的同时拉伸
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摘要
High strength polyester multifilament yarn of improved dimensional stability, which has the proper combination of an intrinsic viscosity of at least 0.90, relatively low work loss and a high degree of toughness, is incorporated as tire cord into a rubber tire for reinforcement to provide an important improvement in fatigue life and retained fatigue strength. The continuous melt-spin process comprises the steps of feeding prepolymer to a first finisher vessel to achieve at least 0.4 intrinsic viscosity transferring polymer to a second finisher vessel for a period sufficient to achieve an intrinsic viscosity of at least 0.95, and supplying this polymer to an extrusion spinnerette.
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