CN116695302A - 一种克服残余扭矩的防火亲肤复合纱线及其纺纱方法 - Google Patents
一种克服残余扭矩的防火亲肤复合纱线及其纺纱方法 Download PDFInfo
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Abstract
本发明公开了克服残余扭矩的防火亲肤复合纱线及其纺纱方法。复合纱线包括两束柔软阻燃短纤维须条和一根高刚度长丝,一根高刚度长丝包缠在一束柔软阻燃短纤维须条上形成包缠纱线,包缠纱线与另一束柔软阻燃短纤维须条加捻形成多个重复的加捻区,加捻区依次包括正向强捻股线结构区、正向弱捻股线结构区、反向弱捻股线结构区、反向强捻股线结构区、反向弱捻股线结构区和正向弱捻股线结构区。纺纱方法如下:两束柔软阻燃短纤维须条与一根高刚度长丝同时平行喂入搓辊装置中反复摩擦搓捻的往返运动,消除了复合纱线内部的残余扭矩,使得复合纱线不易产生由高刚度毛刺带来的刺痒感,其热湿舒适性得到改善,形成服用性能优良的复合纱线。
Description
技术领域
本发明涉及纺织技术领域,尤其涉及一种克服残余扭矩的防火亲肤复合纱线及其纺纱方法。
背景技术
玄武岩纤维、玻璃纤维、碳纤维等高刚度脆性纤维材料不仅具有高于普通纤维的强度和模量,还具有优异的耐高温性、阻燃性以及化学稳定性。但无机纤维由于刚性较高,且在加捻情况下容易发生劈裂,进而产生刺痒感。棉、芳纶等有机短纤维通常具有低模量,并且具有可纺性强和舒适性好的特点。为了结合长丝和短纤维的优点,使用纺丝复合技术来弥补有机纤维和无机纤维以及长丝和短纤的缺点。不幸的是,有机纤维和无机纤维之间存在较大模量差异的问题,高模量的无机长丝在高捻度条件下容易断裂,而低模量的有机纤维在无捻条件下不能很好地抱合纱线。此外,在对高刚性脆性纤维制成的纱线进行合股时,由于合股张力不均匀等因素,容易导致纤维束集束性能差,分股现象严重。因此,如何将高刚度脆性纤维材料纺制成纱线,并改善其服用性能,是当前的研究重点。
中国专利CN102296389B公开了一种化纤长丝包覆刚性纤维长丝的复合纺纱装置及纺纱方法,该方法可以解决刚性纤维长丝易断裂的问题,同时保持其高强高模特性,同时也能保护纤维在加工和使用中免受损伤。然而,采用常规环锭纺纱技术对刚性纤维进行包缠时,需要施加足量的捻度才能完全包覆刚性纤维长丝。这种过度加捻的方式会使得纱线内部的残余扭矩过大,引起纱线捻缩严重,容易对穿戴者造成不适,而且刚性纤维长丝在过大扭应力作用下易断裂,导致后道工序难以进行。
因此,当前有必要探寻一种克服残余扭矩的耐磨、耐高温的防火亲肤复合纱线的新纺纱技术,以解决传统加捻方法存在的问题,并提高纱线的质量和生产效率。
发明内容
本发明的目的在于,针对现有技术的上述不足,提出一种克服残余扭矩的防火亲肤复合纱线及其纺纱方法。
本发明的一种克服残余扭矩的防火亲肤复合纱线,包括两束柔软阻燃短纤维须条和一根高刚度长丝,一根所述高刚度长丝包缠在一束所述柔软阻燃短纤维须条上形成包缠纱线,所述包缠纱线与另一束柔软阻燃短纤维须条加捻形成多个重复的加捻区,所述加捻区依次包括正向强捻股线结构区、正向弱捻股线结构区、反向弱捻股线结构区、反向强捻股线结构区、反向弱捻股线结构区和正向弱捻股线结构区。
进一步的,在所述正向强捻股线结构区和正向弱捻股线结构区,所述高刚度长丝正向包缠在一束所述柔软阻燃短纤维须条上。
进一步的,在所述反向弱捻股线结构区和反向强捻股线结构区,所述高刚度长丝反向包缠在一束所述柔软阻燃短纤维须条上。
进一步的,所述柔软阻燃短纤维须条为聚酰亚胺纤维或芳纶纤维或聚四氟乙烯纤维或聚苯硫醚纤维。
进一步的,所述高刚度长丝为玄武岩纤维长丝或石英纤维长丝或陶瓷纤维长丝或碳纤维长丝或碳化硅纤维长丝。
一种如上述的克服残余扭矩的防火亲肤复合纱线的纺纱方法,两束柔软阻燃短纤维须条与一根高刚度长丝同时平行喂入搓辊装置中进行搓捻处理,两束柔软阻燃短纤维须条和一根高刚度长丝在其搓辊的作用下进行反复摩擦搓捻的往返运动;反复摩擦搓捻的过程具体如下:在施加正向加捻作用时,一根高刚度长丝和一束柔软阻燃短纤维须条进行正向包缠形成一束包缠纱线,同时包缠纱线与另一束柔软阻燃短纤维须条正向加捻形成正向强捻股线结构区;然后再施加反向加捻作用时,包缠纱线与另一束柔软阻燃短纤维须条先形成正向弱捻股线结构区,再形成反向弱捻股线结构区,然后形成反向强捻股线结构区;其中,正向弱捻股线结构区为高刚度长丝正向包缠在柔软阻燃短纤维须条上,反向弱捻股线结构区和反向强捻股线结构区为高刚度长丝反向包缠在柔软阻燃短纤维须条上;再施加正向加捻作用时,部分残余扭矩得以释放,包缠纱线与另一束柔软阻燃短纤维须条先形成反向弱捻股线结构区,再形成正向弱捻股线结构区,然后形成正向强捻股线结构区;其中,反向弱捻股线结构区为高刚度长丝反向包缠在柔软阻燃短纤维须条上,正向弱捻股线结构区和正向强捻股线结构区为高刚度长丝正向包缠在柔软阻燃短纤维须条上;不断重复进行上述的往返搓捻运动,得到一种低残余扭矩的防火亲肤复合纱线。
进一步的,每次施加5-10cm正向加捻作用。
进一步的,每次施加5-10cm反向加捻作用。
进一步的,施加正向加捻作用时的捻向为S捻,施加正向加捻作用时的捻向为Z捻;或者施加正向加捻作用时的捻向为Z捻,施加正向加捻作用时的捻向为S捻。
进一步的,所述柔软阻燃短纤维须条喂入速度为0.4~1m/min;高刚度长丝喂入速度为10~30m/min;输出速度为10~30m/min;包缠纱线中,一根高刚度长丝与一束柔软阻燃短纤维须条的喂入相对距离为0-15mm;捻系数为150~250,捻向为S与Z循环交替。
本发明通过采用往返加捻法对一根高刚度长丝和两束柔软阻燃短纤维须条同步施加正捻,然后进行反捻,以此循环,改变纤维的加捻运动轨迹,平衡纤维之间的扭应力分布,消除纱线内部的残余扭矩,因搓捻辊的正反捻运动消除了纱线内部的残余扭矩,使得复合纱线不易产生由高刚度毛刺带来的刺痒感,其热湿舒适性得到改善,形成服用性能优良的高性能复合纱线。
本发明通过控制高刚度长丝与柔软阻燃短纤维须条的相对位置,可以调节它们之间的包缠角度,从而获得不同结构和质量的纱线。随着相对距离的扩大,高刚度长丝与柔软阻燃短纤维须条之间的包缠角度增大,相互束缚作用增强,柔软阻燃短纤维对高刚度脆性长丝的包覆率提升,降低了高刚度脆性长丝在外力作用下发生劈裂而产生毛刺的可能性,改善了其服用性能。
附图说明
图1是本发明提供的一种克服残余扭矩的防火亲肤复合纱线在纺纱方法中的结构示意图。
1、上搓捻辊;2、下搓捻辊;3;柔软阻燃短纤维须条;4、高刚度长丝;5、加捻三角区;6、正向强捻股线结构区;7、正向弱捻股线结构区;8、反向弱捻股线结构区;9、反向强捻股线结构区。
具体实施方式
以下是本发明的具体实施例并结合附图,对本发明的技术方案作进一步的描述,但本发明并不限于这些实施例。
如图1所示,本发明提供了一种克服残余扭矩的防火亲肤复合纱线及其纺纱方法,包括如下步骤:
一种如上述的克服残余扭矩的防火亲肤复合纱线的纺纱方法,两束柔软阻燃短纤维须条与一根高刚度长丝同时平行喂入搓辊装置中进行搓捻处理,两束柔软阻燃短纤维须条和一根高刚度长丝在其搓辊的作用下进行反复摩擦搓捻的往返运动;反复摩擦搓捻的过程具体如下:
在施加正向加捻作用时,一根高刚度长丝和一束柔软阻燃短纤维须条进行正向包缠形成一束包缠纱线,同时包缠纱线与另一束柔软阻燃短纤维须条正向加捻形成正向强捻股线结构区;然后再施加反向加捻作用时,包缠纱线与另一束柔软阻燃短纤维须条先形成正向弱捻股线结构区,再形成反向弱捻股线结构区,然后形成反向强捻股线结构区;其中,正向弱捻股线结构区为高刚度长丝正向包缠在柔软阻燃短纤维须条上,反向弱捻股线结构区和反向强捻股线结构区为高刚度长丝反向包缠在柔软阻燃短纤维须条上;再施加正向加捻作用时,部分残余扭矩得以释放,包缠纱线与另一束柔软阻燃短纤维须条先形成反向弱捻股线结构区,再形成正向弱捻股线结构区,然后形成正向强捻股线结构区;其中,反向弱捻股线结构区为高刚度长丝反向包缠在柔软阻燃短纤维须条上,正向弱捻股线结构区和正向强捻股线结构区为高刚度长丝正向包缠在柔软阻燃短纤维须条上;不断重复进行上述的往返搓捻运动,得到一种低残余扭矩的防火亲肤复合纱线。
两束柔软阻燃短纤维须条与一根高刚度长丝不断受到一对搓捻辊循环施加的正向和反向加捻应力,形成一段正捻一段反捻的纱线结构;复合纱线内部的正向扭矩与反向扭矩相互抵消,形成柔软阻燃短纤维须条与高刚度长丝相互包缠且无残余扭矩的高性能复合纱线。
在上述搓捻纺纱过程中,各参数可以分别设置如下:柔软阻燃短纤维喂入速度为0.4~1m/min;高刚度长丝喂入速度为10~30m/min;输出速度为10~30m/min;包缠纱线中,一根高刚度长丝与一束柔软阻燃短纤维须条的喂入相对距离为0-15mm;捻系数为150~250,捻向为S与Z循环交替。
实施例1
运用本发明的纺纱方法生产19.7tex复合纱线。选用柔软阻燃短纤维须条为聚酰亚胺纤维,高刚度长丝为玄武岩长丝;聚酰亚胺纤维喂入速度为0.6m/min;玄武岩长丝喂入速度为14m/min;输出速度为14m/min;包缠纱线中,一根高刚度长丝与柔软阻燃短纤维须条的喂入相对距离为4mm;捻系数为180,捻向为S与Z循环交替。
实施例2
运用本发明的纺纱方法生产19.7tex复合纱线。选用柔软阻燃短纤维须条为芳纶纤维,高刚度长丝为碳纤维长丝;芳纶纤维喂入速度为0.7m/min;碳纤维长丝喂入速度为19m/min;输出速度为19m/min;包缠纱线中,一根高刚度长丝与柔软阻燃短纤维须条的喂入相对距离为6mm;捻系数为200,捻向为S与Z循环交替。
实施例3
运用本发明的纺纱方法生产19.7tex复合纱线。选用柔软阻燃短纤维须条为聚四氟乙烯纤维,高刚度长丝为陶瓷纤维长丝;聚四氟乙烯纤维喂入速度为1m/min;陶瓷纤维长丝喂入速度为28m/min;输出速度为28m/min;包缠纱线中,一根高刚度长丝与柔软阻燃短纤维须条的喂入相对距离为9mm;捻系数为230,捻向为S与Z循环交替。
对比例1
运用传统环锭纺纱方法生产19.7tex赛络菲尔复合纱线。捻向只为Z捻,没有正向加捻作用和反向加捻作用的重复,其他同实施例1。
本发明对各纱线样本的主要性能进行测试,其中残余扭矩利用湿缠绕法进行测试,各纱线样本的主要性能测试结果如表1所示:
表1
从表1可以看出,与使用传统环锭纺纱机所纺赛络菲尔复合纱线相比,使用本发明的纺纱方法所纺复合纱线的残余扭矩(湿扭结数)都显著下降,断裂强力和断裂伸长率均得到极大提升,毛羽情况得到一定改善,而条干性能略微下降,原因在于本发明的纺纱方法平衡了纤维之间的扭应力分布,消除了纱线内部的残余扭矩,使得高刚度长丝处于几乎无捻缩状态,能极大程度上发挥其高强度的特性,但伴随着搓捻辊正反捻运动的抵消作用,长丝对短纤维的束缚作用下降,造成了一定的不匀率。本发明的技术方法不仅简单,而且有效消除了纱线内部的残余扭矩,改善了成纱质量,并且其制造成本低廉,适于纺织行业推广应用。
以上未涉及之处,适用于现有技术。
虽然已经通过示例对本发明的一些特定实施例进行了详细说明,但是本领域的技术人员应该理解,以上示例仅是为了进行说明,而不是为了限制本发明的范围,本发明所属技术领域的技术人员可以对所描述的具体实施例来做出各种各样的修改或补充或采用类似的方式替代,但并不会偏离本发明的方向或者超越所附权利要求书所定义的范围。本领域的技术人员应该理解,凡是依据本发明的技术实质对以上实施方式所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围。
Claims (10)
1.一种克服残余扭矩的防火亲肤复合纱线,其特征在于:包括两束柔软阻燃短纤维须条和一根高刚度长丝,一根所述高刚度长丝包缠在一束所述柔软阻燃短纤维须条上形成包缠纱线,所述包缠纱线与另一束柔软阻燃短纤维须条加捻形成多个重复的加捻区,所述加捻区依次包括正向强捻股线结构区、正向弱捻股线结构区、反向弱捻股线结构区、反向强捻股线结构区、反向弱捻股线结构区和正向弱捻股线结构区。
2.如权利要求1所述的一种克服残余扭矩的防火亲肤复合纱线,其特征在于:在所述正向强捻股线结构区和正向弱捻股线结构区,所述高刚度长丝正向包缠在一束所述柔软阻燃短纤维须条上。
3.如权利要求1或2所述的一种克服残余扭矩的防火亲肤复合纱线,其特征在于:在所述反向弱捻股线结构区和反向强捻股线结构区,所述高刚度长丝反向包缠在一束所述柔软阻燃短纤维须条上。
4.如权利要求1所述的一种克服残余扭矩的防火亲肤复合纱线,其特征在于:所述柔软阻燃短纤维须条为聚酰亚胺纤维或芳纶纤维或聚四氟乙烯纤维或聚苯硫醚纤维。
5.如权利要求1所述的一种克服残余扭矩的防火亲肤复合纱线,其特征在于:所述高刚度长丝为玄武岩纤维长丝或石英纤维长丝或陶瓷纤维长丝或碳纤维长丝或碳化硅纤维长丝。
6.一种如权利要求1-5任一项所述的克服残余扭矩的防火亲肤复合纱线的纺纱方法,其特征在于:两束柔软阻燃短纤维须条与一根高刚度长丝同时平行喂入搓辊装置中进行搓捻处理,两束柔软阻燃短纤维须条和一根高刚度长丝在其搓辊的作用下进行反复摩擦搓捻的往返运动;反复摩擦搓捻的过程具体如下:在施加正向加捻作用时,一根高刚度长丝和一束柔软阻燃短纤维须条进行正向包缠形成一束包缠纱线,同时包缠纱线与另一束柔软阻燃短纤维须条正向加捻形成正向强捻股线结构区;然后再施加反向加捻作用时,包缠纱线与另一束柔软阻燃短纤维须条先形成正向弱捻股线结构区,再形成反向弱捻股线结构区,然后形成反向强捻股线结构区;其中,正向弱捻股线结构区为高刚度长丝正向包缠在柔软阻燃短纤维须条上,反向弱捻股线结构区和反向强捻股线结构区为高刚度长丝反向包缠在柔软阻燃短纤维须条上;再施加正向加捻作用时,部分残余扭矩得以释放,包缠纱线与另一束柔软阻燃短纤维须条先形成反向弱捻股线结构区,再形成正向弱捻股线结构区,然后形成正向强捻股线结构区;其中,反向弱捻股线结构区为高刚度长丝反向包缠在柔软阻燃短纤维须条上,正向弱捻股线结构区和正向强捻股线结构区为高刚度长丝正向包缠在柔软阻燃短纤维须条上;不断重复进行上述的往返搓捻运动,得到一种低残余扭矩的防火亲肤复合纱线。
7.如权利要求6所述的克服残余扭矩的防火亲肤复合纱线的纺纱方法,其特征在于:每次施加5-10cm正向加捻作用。
8.如权利要求6所述的克服残余扭矩的防火亲肤复合纱线的纺纱方法,其特征在于:每次施加5-10cm反向加捻作用。
9.如权利要求6所述的克服残余扭矩的防火亲肤复合纱线的纺纱方法,其特征在于:施加正向加捻作用时的捻向为S捻,施加正向加捻作用时的捻向为Z捻;或者施加正向加捻作用时的捻向为Z捻,施加正向加捻作用时的捻向为S捻。
10.如权利要求6所述的克服残余扭矩的防火亲肤复合纱线的纺纱方法,其特征在于:所述柔软阻燃短纤维须条喂入速度为0.4~1m/min;高刚度长丝喂入速度为10~30m/min;输出速度为10~30m/min;包缠纱线中,一根高刚度长丝与一束柔软阻燃短纤维须条的喂入相对距离为0-15mm;捻系数为150~250,捻向为S与Z循环交替。
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