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    • 1. 发明申请
    • COPOLYMER FIBERS AND YARNS AND PROCESSES FOR MAKING SAME
    • 共聚物纤维和纱线及其制造方法
    • WO2012097228A1
    • 2012-07-19
    • PCT/US2012/021208
    • 2012-01-13
    • E. I. DU PONT DE NEMOURS AND COMPANYKNOFF, Warren, FrancisNEWTON, Christopher William
    • KNOFF, Warren, FrancisNEWTON, Christopher William
    • D01D5/06D01F6/82D01F6/74D02G3/02
    • D01D5/04D01D5/12D01D10/02D01D10/06D01F6/80D01F6/805D01F6/905D02G1/02D10B2401/063
    • The present invention concerns methods for obtaining high-tenacity aramid yarn, wherein the yarn is made of a copolymer obtained from a mixture of monomers comprising 5-(6)-amino-2-(p-aminophenyl)benzimidazole, an aromatic para-diamine, and an aromatic para-diacid; the method comprising: a) spinning said copolymer from an inorganic acid solvent to produce the aramid yarn; b) washing said yarn with a basic aqueous solution for at least 5 seconds; and c) heating said yarn; wherein the yarn is heated in at least two process steps, characterized in that (i) in a first step the yarn is heated at a temperature of 200 to 360° C at a tension of at least 0.2 cN/dtex, followed by (ii) a second step wherein the yarn is heated at a temperature of 370 to 500° C at a tension of less than 1 cN/dtex. In some embodiments, the yarn has an effective polymer cation to sulfur content molar ratio of at least 0.3. In some embodiments, the yarn has a hydrolytic strength retention of the yarn is greater than 60%.
    • 本发明涉及获得高强度芳族聚酰胺纱线的方法,其中纱线由由包含5-(6) - 氨基-2-(对氨基苯基)苯并咪唑的单体混合物,芳族对二胺 和芳香族对二酸; 所述方法包括:a)从无机酸溶剂旋转所述共聚物以产生芳族聚酰胺纱线; b)用碱性水溶液洗涤所述纱线至少5秒钟; 和c)加热所述纱线; 其中所述纱线在至少两个工艺步骤中加热,其特征在于:(i)在第一步骤中,纱线在200至360℃的温度下以至少0.2cN / dtex的张力加热,随后(ii )第二步骤,其中纱线在370-500℃的温度下以小于1cN / dtex的张力加热。 在一些实施方案中,纱线具有至少0.3的有效聚合物阳离子与硫含量的摩尔比。 在一些实施方案中,纱线具有大于60%的纱线的水解强度保持性。