CN1481455A - 具有改善耐磨性的纱线和织物 - Google Patents
具有改善耐磨性的纱线和织物 Download PDFInfo
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Abstract
本发明涉及一种耐磨性改善的纱线、由此种纱线制造的织物以及制备该纱线或织物的方法。该纱线包括(a)芳族聚酰胺纤维和(b)最高达40wt%熔点介于200~300℃的合成聚合物纤维,仅以(a)与(b)的总重量为基准,其中该纱线或包括该纱线的织物在低于成分(b)纤维熔点的温度进行热处理。
Description
发明背景
1.技术领域
本发明涉及耐磨纱线和织物的领域,特别是涉及包括耐磨或防割断纤维的纱线和织物领域。
2.相关技术
防护服,如包括耐磨或防割断纱线的手套是技术上公知的。例如,美国专利5,822,791公开一种防切割和液体渗透的防护手套。该手套由防割断纱线,例如由芳族聚酰胺纤维制成的纱线,天然纤维的中间层和不透液、柔性弹性体材料的外层构成。
美国专利6,021,523公开一种耐热、耐磨的手包裹物,系采用一种织物制成,织物由芳族聚酰胺纤维制成,芳族聚酰胺纤维包缠氧化的聚丙烯腈或聚丙烯酸酯纱线的面层。该芳族聚酰胺纤维先以水蒸汽,然后以防燃蜡或有机硅化合物进行调理。
防切割和耐磨手套一般用于手套预计反复遇到锐利物体的应用场合。由于遭遇锐利物体,手套的磨损寿命有限,因此需要经常更换。
如在美国专利4,920,000中所示,曾通过芳族聚酰胺纤维与其他高耐磨纤维如尼龙进行掺混尝试改善手套的耐磨。由芳族聚酰胺和尼龙纤维的此种共混物制成制品的耐磨性改善与共混物中尼龙纤维的含量成正比,但制品的此种改善仍然有限。
综上所述,目前本领域需要提供一种防割和耐磨性改善的纱线和织物,以便延长由此种纱线和织物制造的诸如手套之类制品的磨损寿命。
发明概述
本发明涉及一种耐磨性改善的纱线、包括此种纱线的织物以及制备该纱线或织物的方法。该纱线包括(a)芳族聚酰胺纤维和(b)最高达40wt%熔点介于200~300℃的合成聚合物纤维,仅以(a)与(b)的总重量为基准,其中该纱线已在低于成分(b)纤维熔点的温度进行热处理。纱线的此种热处理可在纱线制成织物之前或以后进行。
发明详述
本发明涉及一种耐磨性比传统耐磨纱线和织物提高但却不是僵硬得不理想的纱线和包括该纱线的织物。
本发明纱线包括(a)芳族聚酰胺纤维和(b)最高达40wt%熔点介于200~300℃的合成聚合物纤维。本发明的一个重要方面在于,该纱线或包括该纱线的织物在低于成分(b)纤维的熔点的温度进行热处理。
本发明纱线或织物的成分(a)中使用的芳族聚酰胺纤维,是对位芳族聚酰胺纤维。所谓对位芳族聚酰胺纤维是指对由位芳族聚酰胺聚合物构成的纤维或由所谓的刚性棒状聚合物构成的纤维。优选的聚合物是聚(对苯二甲酰对苯二胺)(PPD-T)。所谓PPD-T是指由对苯二胺与对苯二甲酰氯按等摩尔聚合生成的均聚物,也指通过少量其他二胺与对苯二胺或者少量其他二酰氯与对苯二甲酰氯的结合所生成的共聚物。一般而言,其他二胺和其他二酰氯的用量最多可高达对苯二胺或对苯二甲酰氯的约10mol%或稍高,条件是其他二胺和二酰氯没有干扰聚合反应的活性基团。术语PPD-T也包括通过加入其他芳族二胺与其他二酰氯如2,6-萘二甲酰氯或氯代-或二氯对苯二甲酰氯生成的共聚物;只要其他芳族二胺和芳族二酰氯的存在量不致给对位芳族聚酰胺的性能造成不利影响。
添加剂可与对位芳族聚酰胺一起用于该纤维中,并且已发现,最高达10wt%其他聚合材料也可与该芳族聚酰胺掺混,或者可使用含有最高达10wt%替代芳族聚酰胺的二胺的其他二胺或者最高达10wt%替代该芳族聚酰胺的二酰氯的其他二酰氯的共聚物。
对位芳族聚酰胺纤维可通过技术上熟知的方法制备,通常是是借助将对位芳族聚酰胺通过喷丝孔挤出到凝固浴中来纺丝的。在聚(对苯二甲酰对苯二胺)的情况下,溶液的溶剂一般是浓硫酸,挤出一般是经过一段空气隙再进入冷的含水凝固浴的。
本发明成分(b)纤维可以是尼龙、聚酯或其共混物的纤维。
本文所使用的术语“尼龙”是指脂族聚酰胺聚合物,包括聚己二酰己二胺(尼龙66)、聚己内酰胺(尼龙6)、聚丁内酰胺(尼龙4)、聚(9-氨基壬酸)(尼龙-9)、聚庚内酰胺(尼龙7)、聚辛内酰胺(尼龙8)、聚癸二酰己二胺(尼龙6,10)以及诸如此类。聚己二酰己二胺(尼龙66)是优选的尼龙。
“尼龙纤维”是指任何由尼龙制成的纤维。尼龙纤维一般通过将尼龙聚合物熔体通过纺丝孔挤出到空气凝固介质中,或者技术上已知的其他方法来纺丝的。
本文使用的术语“聚酯”是指由二醇与二羧酸之间的缩聚反应合成的聚合物。
“聚酯纤维”是指任何由聚酯制成的纤维。聚酯纤维是通过熔融纺丝方法以及其他技术上已知的方法由熔融聚合物纺成丝的。
本发明的纱线可包含最高约40wt%成分(b)纤维。更高数量成分(b)纤维虽可使用,但这样做之后看不到纱线或采用该纱线制造的织物在耐磨性上有任何提高。纱线中纤维的优选(含量)范围是,约70~约95wt%成分(a)纤维和约5~约30wt%成分(b)纤维,更优选的范围是,约75~90wt%成分(a)纤维和约10~约25wt%成分(b)纤维。这些重量百分率仅以成分(a)与(b)的相对数量为基准。
成分(a)和(b)的纤维优选是特定长度和特定线密度的短纤维。用于本发明,可采用2.5~1.5cm(1~6英寸)的合成短纤维长度,其中优选3.8~11.4cm(1.5~4.5英寸)的长度。纤维的线密度可介于0.5~7分特,优选1~3分特。
纤维可采用任何常规方法纺成纱线,例如,环锭、气流纺纱、村田-喷射纺纱或摩擦纺纱。纱线,一旦纺成,便可立即加捻在一起从而制成合股纱。
本发明的一个重要方面是,对该纱线或织物热处理。该热处理可对纱线实施,然后再制成机织或针织物。与其中所用纱线未经热处理的织物相比,该织物表现出耐磨性的提高。另外,未经热处理的纱线也可制机织或针织物,然后该织物进行热处理。与其中所用纱线未经热处理的织物相比,该织物也表现出耐磨性的提高。
该机织或针织物可包括100wt%本发明纱线。优选的是,该织物包括不少于10wt%本发明纱线,更优选不少于40wt%本发明纱线。
该纱线或织物应在低于成分(b)的熔点的温度进行热处理。一般而言,纱线或织物应在约100~约300℃的温度热处理约10~约20分钟的时间。优选的温度介于150~300℃,更优选的温度介于约200~约250℃。换句话说,该纱线或织物可在低于成分(b)的熔点的约90%的温度进行热处理。优选的加热时间介于约5~约10分钟。加热一般在大气压压力下实施。
高于300℃的温度虽可采用,但是此种较高温度不实际,因为高于该温度,聚酯熔融,且热处理的纱线或织物将变得相当僵硬。
类似地,大于20分钟的加热时间虽可使用,但如此长的加热时间并不实用,因为会导致纱线或织物变得相当僵硬。
本发明纱线和织物可用于任何将受到磨耗的制品以及任何要求高耐磨的场合。此种制品的例子包括皮护腿套裤、防护服、围裙、套袖、手覆盖物,如手套等。
实施例
各种织物的耐磨性在下面的实例中采用题为“纺织织物耐磨性的标准试验方法”,ASTM标准D3884-92的试验方法进行测试。在该试验中,样品织物利用在控制的压力和磨料作用条件下的旋转摩擦作用进行磨耗。具体地说,采用泰伯磨耗机(Taber Abraser)和#H-18磨料轮在500g荷重下磨耗织物样品。磨耗一直进行至磨料轮达到织物样品磨穿为止。测定4个样品直至磨穿这一点的转数并取平均值。
实例1和对比例2
这些例子对比了热处理对某些织物产生的效果。本发明高耐磨织物由PPD-T短纤维与聚酯纤维紧密共混物的环锭纺纱线制成。PPD-T纤维是1.5dpf和1.5英寸长;聚酯纤维是1.2dpf和1.5英寸长。制备由90wt%PPD-T与10wt%聚酯组成的开清棉掺混的条子(picker blend sliver),并采用常规棉纺系统在环锭纺纱机上加工成3.2捻系数的短纤纱。如此制备的纱线为10cc(棉纱支数)。然后此种单根纱两根合股并反向加捻形成10/2cc的平衡的纱线。
该10/2cc纱线采用标准Sheima Seiki手套针织机编织成手套样品。调节机器编织时间,以生产出约1m长手套体,作为以后防割和耐磨试验用的织物样品。该样品是通过将3根10/2cc纱线喂入到手套编织机中以生产出约20盎司/平方码(0.67kg/m2)的织物样品而制成的。随后,织物在250℃的烘箱内热处理10min。
作为比较,采用一种相同但不经热处理的织物作为样品。
该热处理织物和未热处理的织物都进行上述ASTM耐磨试验,结果载于下表1。
表1
实例号 耐磨性(次数)
实例1 2049
对比例2 971
这些例子显示本发明织物耐磨性出乎意料的提高。
对比例3和实例4~6
这些例子展示加热温度对织物耐磨的影响。热处理之前的实例1中制备的织物,在3种不同温度下进行相同时间,10min,的热处理。热处理后,按照实例1那样测定热处理过的织物的耐磨性,结果载于下表2。
表2
实例号 温度(℃) 耐磨性
(次数)
对比例3 未热处理 971
实例4 100 1265
实例5 200 1653
实例6 250 2049
这些例子显示按照本发明经过热处理的织物耐磨性出乎意料的改善。
对比例7和实例8~12
这些例子展示加热时间对织物耐磨性的影响。热处理之前的实例1中制备的样品在250℃下进行5种不同时间的热处理。按照实例1那样测定热处理过织物的耐磨性,结果载于下表3。
表3
实例号 时间(分钟) 耐磨
(次数)
对比例7 0 900
实例8 5 1600
实例9 10 1800
实例10 15 2000
实例11 20 2300
实例12 30 1700
这些例子显示按照本发明经过热处理的织物耐磨性出乎意料的改善。数据显示,当织物在250℃处理30分钟时,虽然其耐磨性高于未经热处理的对比例,但与热处理20分钟的实例11相比下降了。
对比例13和实例14~17
这些例子展示成分(b)的含量对织物耐磨性的影响。一种高耐磨织物由PPD-T短纤维和尼龙纤维的紧密共混物环锭纺纱线制成。PPD-T纤维是1.5dpf和1.5英寸长;尼龙纤维是1.1dpf和1.5英寸长。
用PPD-T和尼龙的4种不同共混物制备PPD-T和尼龙的开清棉掺混条子,采用常规棉纺系统的环锭纺纱机加工成具有3.2捻系数的短纤纱。如此制备的纱线为10cc(棉纱支数)。然后此种单根纱两根合股并反向加捻形成10/2cc的平衡的纱线。
织物样品按实例1那样制备。作为比较,又按相同的方式制备一种织物,只是织物由100%PPD-T纤维制成。
随后,织物样品在250℃下热处理10min。
热处理织物和未热处理织物样品的耐磨性载于下表4。
表4
实例号 PPD-T(%) 尼龙(%) 耐磨性(次数)
未处理 处理
对比例13 100 0 860 1395
实例14 90 10 1000 1850
实例15 80 20 1219 2960
实例16 70 30 1173 2122
实例17 60 40 1355 1676
这些例子展示当实例14~17的织物经过热处理时,耐磨性表现出出乎意料的提高。另外,实例14~17还展示由PPD-T与尼龙共混物的纱线制成的织物,与采用仅由PPD-T构成的纱线制成的织物相比,耐磨性出乎意料地提高。
Claims (28)
1.一种耐磨性改善的纱线,包含(a)芳族聚酰胺纤维和(b)最高达40wt%熔点介于200~300℃的合成聚合物的纤维,仅以成分(a)和(b)的相对数量为基准,所述纱线已在低于成分(b)纤维的熔点的温度下进行热处理。
2.权利要求1的纱线,其中成分(a)纤维是对位芳族聚酰胺纤维。
3.权利要求1的纱线,其中成分(a)纤维是对苯二甲酰对苯二胺纤维。
4.权利要求1的纱线,其中成分(b)纤维是尼龙、聚酯或其共混物的纤维。
5.权利要求1的纱线,其中成分(b)纤维以5~30wt%的数量存在,仅以成分(a)和(b)纤维的总重量为基准。
6.权利要求1的纱线,其中成分(b)纤维以10~25wt%的数量存在,仅以成分(a)和(b)纤维的总重量为基准。
7.权利要求1的纱线,其中纤维是长2.5~15cm的短纤维。
8.权利要求1的纱线,其中成分(b)纤维是尼龙纤维,且纱线在最高约250℃的温度进行热处理。
9.权利要求1的纱线,其中成分(b)纤维是聚酯纤维,且纱线在最高约250℃的温度进行热处理。
10.权利要求1的纱线,其中纱线热处理最长约20分钟。
11.一种耐磨性改善的织物,包含(a)芳族聚酰胺纤维和(b)最高达40wt%熔点介于200~300℃的合成聚合物的纤维,仅以成分(a)和(b)的相对数量为基准,所述织物已在低于成分(b)纤维的熔点的温度进行热处理。
12.权利要求11的织物,其中成分(a)纤维是对位芳族聚酰胺纤维。
13.权利要求11的织物,其中成分(a)纤维是对苯二甲酰对苯二胺纤维。
14.权利要求11的织物,其中成分(b)纤维是尼龙、聚酯或其共混物的纤维。
15.权利要求11的织物,其中成分(b)纤维以5~30wt%的数量存在,仅以成分(a)和(b)纤维的总重量为基准。
16.权利要求11的织物,其中成分(b)纤维以10~25wt%的数量存在,仅以成分(a)和(b)纤维的总重量为基准。
17.权利要求11的织物,其中纤维是长2.5~15cm的短纤维。
18.权利要求11的织物,其中成分(b)纤维是尼龙纤维,且织物在最高约250℃的温度进行热处理。
19.权利要求11的织物,其中成分(b)纤维是聚酯纤维,且织物在最高约250℃的温度进行热处理。
20.权利要求11的织物,其中纱线热处理最长约20分钟。
21.权利要求11的织物,其中该织物是机织物。
22.权利要求11的织物,其中该织物是针织物。
23.由权利要求1的纱线制造的制品。
24.由权利要求11的织物制造的制品。
25.一种制备耐磨纱线的方法,包括下列步骤:
提供一种纱线,包含(a)芳族聚酰胺纤维和(b)最高达40wt%熔点介于200~300℃的合成聚合物的纤维,仅以成分(a)和(b)的相对数量为基准,
所述纱线在低于成分(b)纤维的熔点的温度下进行热处理。
26.权利要求25的方法,还包括对该纱线进行20分钟或更短时间的热处理的步骤。
27.一种制备耐磨织物的方法,包括下列步骤:
提供一种织物,它包含(a)芳族聚酰胺纤维和(b)最高达40wt%熔点介于200~300℃的合成聚合物的纤维,仅以成分(a)和(b)的相对数量为基准,以及
所述织物在低于成分(b)纤维的熔点的温度下进行热处理。
28.权利要求27的方法,还包括对织物进行20分钟或更短时间的热处理的步骤。
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US09/747,675 US6602600B2 (en) | 2000-12-22 | 2000-12-22 | Yarn and fabric having improved abrasion resistance |
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CA (1) | CA2427331A1 (zh) |
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US8117815B2 (en) * | 2005-11-16 | 2012-02-21 | Ladama, Llc | Fire retardant compositions and methods and apparatuses for making the same |
EP1862572A1 (en) * | 2006-06-02 | 2007-12-05 | DSMIP Assets B.V. | Cut resistant yarn |
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US7358203B1 (en) * | 2006-10-10 | 2008-04-15 | E.I. Du Pont De Nemours And Company | Stain-masking cut resistant fabrics and articles and processes for making same |
US20080085411A1 (en) * | 2006-10-10 | 2008-04-10 | Larry John Prickett | Multidenier fiber cut resistant fabrics and articles and processes for making same |
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