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公开(公告)号：US5906891A
公开(公告)日：1999-05-25
申请号：US88835
申请日：1998-06-02
CPC分类号： D01F6/90 , Y10T428/2913 , Y10T428/2969
摘要： An oriented polyamide fiber which comprises at least 20% by weight of a crystalline polyamide copolymer (A) produced by polymerizing at least one diamine monomer containing at least 70 mol % m-xylylenediamine and at least one dicarboxylic acid monomer containing at least 70 mol % adipic acid. The oriented polyamide fiber having a Young's modulus of at least 400 kgf/mm.sup.2, a loop strength of at least 4.5 gf/D, a knot tensile strength of at least 3.5 gf/D and a roundness of from 97 to 100%. A process for producing the oriented polyamide fiber which comprises melting a polyamide resin comprising the crystalline polyamide copolymer (A); spinning the molten resin through a spinneret; pulling the spun product into a coolant bath disposed beneath the face of the spinneret to produce non-oriented fiber to a draw ratio of 2.5 to 8.0 at a temperature not lower than the Tg of the polyamide and not higher than the melting point of the polyamide, wherein the draft ratio is 1.0 to 3.0, and the temperature of the coolant bath (T) satisfies the relational expression: Tg-30.ltoreq.T.ltoreq.Tg+10 (.degree.C.). The oriented polyamide fiber can be used in sporting goods and industrial materials such as strings for a racket, rubber reinforcing materials and filter cloth materials for paper making, by virtue of its high strength, modulus of elasticity and roundness.
摘要翻译： 一种取向聚酰胺纤维，其包含至少20重量％的结晶聚酰胺共聚物（A），其通过聚合至少一种含有至少70mol％间苯二甲胺的二胺单体和至少一种含有至少70mol％ 己二酸。 杨氏模量为400kgf / mm2以上的取向聚酰胺纤维，回弹强度为4.5gf / D，结强度为3.5gf / D，圆度为97〜100％。 一种制备定向聚酰胺纤维的方法，包括熔融包含结晶性聚酰胺共聚物（A）的聚酰胺树脂; 通过喷丝头纺出熔融树脂; 将纺丝产品拉入设置在喷丝头表面下方的冷却剂浴，以在不低于聚酰胺的Tg的温度下制成无取向纤维，拉伸比为2.5-8.0，不高于聚酰胺的熔点 其中，牵伸比为1.0〜3.0，冷却剂浴（T）的温度满足关系式：Tg-30≤T≤TG+ 10（℃）。 取向聚酰胺纤维由于其高强度，弹性模量和圆度而可用于运动用品和工业用材料，例如球拍用绳，橡胶增强材料和造纸用滤布材料。
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公开(公告)号：US5882793A
公开(公告)日：1999-03-16
申请号：US762100
申请日：1996-12-09
CPC分类号： D01F6/90 , Y10T428/2913 , Y10T428/2969
摘要： There are disclosed oriented polyamide fiber which comprises at least 20% by weight of a crystalline polyamide or a copolymerized polyamide each produced by polymerizing a monomer containing m-xylylenediamine as a diamine component and adipic acid as a dicarboxylic acid component each in an amount of at least 70 mol % (A) and which has a Young's modulus of at least 400 kgf/mm.sup.2, a loop strength of at least 4.5 gf/D, a knot tensile strength of at least 3.5 gf/D and a roundness of from 97 to 100%; and a process for producing oriented polyamide fiber which comprises the steps of melting a polyamide resin comprising at least 20% by weight of the above crystalline polyamide or copolymerized polyamide (A); spinning the molten resin through a spinneret; pulling the spun product into a coolant bath placed beneath the face of the spinneret to produce non-oriented yarn; and thereafter orienting the non-oriented yarn to a draw ratio of from 2.5. to 8.0 at a temperature not lower than the Tg of the polyamide and not higher than the melting point thereof, wherein the draft ratio is from 1.0 to 3.0, and the temperature of the coolant bath (T) satisfies the relational expression: Tg-30.ltoreq.T.ltoreq.Tg+10 (.degree.C.). The oriented polyamide fiber is useful for use in sporting goods and industrial materials such as strings for a racket, rubber reinforcing materials and filter cloth materials for paper making by virtue of its improvement in strength, modulus of elasticity and roundness.
摘要翻译： 公开了取向聚酰胺纤维，其包含至少20重量％的结晶性聚酰胺或共聚聚酰胺，其通过将含有间苯二甲胺作为二胺组分的单体和作为二羧酸成分的己二酸各自以 至少70mol％（A），并且其杨氏模量为至少400kgf / mm2，环强度为至少4.5gf / D，结拉伸强度为至少3.5gf / D，圆度为97至 100％; 和一种制备定向聚酰胺纤维的方法，其包括熔化包含至少20重量％上述结晶聚酰胺或共聚聚酰胺（A）的聚酰胺树脂的步骤; 通过喷丝头纺出熔融树脂; 将纺丝产品拉入设置在喷丝头表面下方的冷却液浴槽，以产生无取向纱线; 然后将非取向纱线取向为2.5的拉伸比。 在不低于聚酰胺的Tg的温度为8.0以下且不高于其熔点，其中牵伸比为1.0〜3.0，冷却剂浴（T）的温度满足关系式：Tg-30
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