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Methods for spinning and winding polyester filaments, polyester filaments obtained by the spinning method, stretch texture processing of the polyester filaments, and bulky polyester filaments obtained by stretch texture processing
Methods for spinning and winding polyester filaments, polyester filaments obtained by the spinning method, stretch texture processing of the polyester filaments, and bulky polyester filaments obtained by stretch texture processing
Production of preoriented and melt spun polyester filaments comprising 90 wt.% of polybutylene terephthalate (PBT) of the total polyester filament weight and/or polytrimethylene terephthalate (PTMT) involves setting the spin draft, cooling directly and bundling together at a gap of 500-2500 mm. Production and winding of preoriented and melt spun polyester filaments comprising at least 90 wt.% of polybutylene terephthalate (PBT) of the total polyester filament weight and/or polytrimethylene terephthalate (PTMT) and is preferably wholly of PTMT. The spin draft is set at 70-500. The filaments are cooled directly on leaving the spinneret for a length of 30-200 mm, to a temperature below the setting point, and bundled together at a gap of 500-2500 mm from the under side of the spinneret. The filament tension before and between the godet rollers is 0.05-0.20 cN/dtex. The filament winding speed is 2200-6000 m/min. The polyester contains a polymer additive to increase its stretch, mixed in at a rate of 0.05-2.5 wt.% of the total filament weight. Independent claims are included for: (1) preoriented polyester filaments which, after four weeks of storage, have a stretch to break of 90-165%, a boiling shrinkage of at least 30%, a normal uster of =1.1%, a double refraction of 0.030-0.058, a density of =1.35 g/cm 3 and preferably =1.33 g/cm 3, a variation coefficient of the shearing load and stretch to break of =4.5%; and (2) a bulked polyester filament, where the POY yarns are passed through a draw texturizing unit at a speed of at least 500 m/min. with a drafting ratio of at least 1:1.35 to give a bulked filament yarn with a shear strength of =26 cN/tex and a stretch to break of =30% or =36%.
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机译：包含总聚酯长丝重量的90％（重量）的聚对苯二甲酸丁二酯（PBT）和/或聚对苯二甲酸丙二醇酯（PTMT）的预取向和熔纺聚酯长丝的生产涉及设定纺丝牵伸，直接冷却并以500-500的间距捆扎在一起2500毫米预取向和熔纺聚酯长丝的生产和卷绕，所述聚酯长丝包含总聚酯长丝重量的至少90重量％的聚对苯二甲酸丁二酯（PBT）和/或聚对苯二甲酸丙二醇酯（PTMT），并且优选全部为PTMT。旋转吃水设置为70-500。在离开喷丝头的长度为30-200 mm的温度下，将长丝直接冷却至设定点以下的温度，并在距喷丝头下侧500-2500 mm的间隙处捆扎在一起。导丝辊之前和之间的长丝张力为0.05-0.20 cN / dtex。灯丝缠绕速度为2200-6000 m / min。聚酯包含聚合物添加剂以增加其拉伸性，以总长丝重量的0.05-2.5重量％的比例混合。包括以下方面的独立权利要求：（1）预取向聚酯长丝，在储存四个星期后，其拉伸断裂强度为90-165％，沸腾收缩率至少为30％，正常乌斯特= 1.1％，两倍折射率为0.030-0.058，密度为1.35g / cm 3，优选为1.33g / cm 3，剪切载荷和拉伸断裂的变化系数为4.5％。 （2）膨松的聚酯长丝，其中所述POY纱线以至少500m / min的速度通过拉伸变形单元。以至少1：1.35的牵伸比得到膨松的长丝纱线，其抗剪强度≥26cN / tex，断裂伸长率≥30％或≥36％。
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