CN109677094B - 一种层压防水织物的制备方法 - Google Patents
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Abstract
本发明提供的一种层压防水织物的制备方法,其包括步骤:S100将乙醇和交联剂按1~3:1的比例,配置成工作液,浸轧织物,并在120℃的条件下加热8h,烘干获得备用织物;S200层压复合,在备用织物的表面覆上聚四氟乙烯,加入丙酮溶解后浸轧;S300与竹纤维纱层压无张力复合,复合压力为4~6MPa,复合温度50~100℃,固化时间12~36h。从而通过运用竹浆纤维纱、低弹涤纶丝获得具有抗菌功能的单面竹纤维毛圈布,再复合防水透气环保型PTFE薄膜,制得产品手感柔软、光泽柔和吸湿、导湿、防水、透气的优点。
Description
技术领域
本发明涉及服装领域,具体地说,是一种层压防水织物的制备方法。
背景技术
随着消费者生活质量的不断提升,消费者对衣服防水透气的要求也日见迫切。防水透湿织物在国外又称“可呼吸织物”(Waterproof,Windproof,and breathable fabricWWB),它是世界纺织业不断向高档次发展的集防水、透湿、防风和保暖性能于一体的独具特色的功能织物。这种织物不仅能满足严寒雨雪、大风天气等恶劣环境中人们活动时的穿着需要(如冬季军服等),也适用于人们日常生活对雨衣等的要求,具有广阔的发展前景。
防水透湿织物发展过程的主线是涂层和层压织物,辅线是高密织物的发展。涂层织物和层压织物由于其可以达到很高的防水透湿性,又可按需要提供不同档次(如高防水、低透湿型、低防水、高透湿型等)、不同要求(如保温、迷彩、阻燃等)的产品而占据市场的主导地位。高密织物虽无法达到很高的防水性,但其优越的手感、良好的透湿性,使其在市场上仍占有一席之地。
我们按国家标准对羊皮板的测试结果如下:透湿量为5490g/m2·24h,耐静水压为14.90kPa,透气量为1.08×10-2m3/m2·s。因此可以认为兽毛皮是最早的防水透湿材料。由英国Shirley锡莱研究所设计的著名文泰尔(Ventel)防雨布,它的出现标志着防水透湿织物正式走向市场。这是一种细号低捻度纯棉纱高密织物。在干燥的文泰尔防雨织物中,经纬纱之间的微孔比较大,能提供高度透湿的结构。一旦润湿,棉纤维膨胀,迫使孔隙缩小,这一闭孔机制同特殊的拒水整理相结合,保护织物不被雨水进一步渗透,从而具有防水性。
采用聚氯乙烯、聚氨酯等涂层剂,其涂层厚度一般大于60g/m2,这种涂层织物防水性很好但不透气;使用聚丙烯酸酯、亲水性聚氨酯等亲水涂层剂,可以使织物具有较好的透湿性,但涂层剂吸水后,机械强度下降,防水性和牢度变差。
发明内容
本发明的主要目的在于提供一种层压防水织物的制备方法,其克服现有技术的不足,通过运用竹浆纤维纱、低弹涤纶丝获得具有抗菌功能的单面竹纤维毛圈布,再复合防水透气环保型PTFE薄膜,制得产品手感柔软、光泽柔和吸湿、导湿、防水、透气的优点。
为达到以上目的,本发明采用的技术方案为:一种层压防水织物的制备方法,包括步骤:
S100将乙醇和交联剂按1~3:1的比例,配置成工作液,浸轧织物,并在120℃的条件下加热8h,烘干获得备用织物;
S200层压复合,在备用织物的表面覆上聚四氟乙烯,加入丙酮溶解后浸轧;
S300与竹纤维纱层压无张力复合,复合压力为4~6MPa,复合温度50~100℃,固化时间12~36h。
根据本发明的一实施例,乙醇与交联剂之比为1:1。
根据本发明的一实施例,在步骤S100中的交联剂的制备方法,包括步骤:
S110在装有磁转子、冷凝管、温度计和恒压漏斗的三口烧瓶中,加入相应重量份的二甲基二烯丙基氯化铵、N-(3-二烷基氨基丙基)丙烯酰胺、N,N-二烷基氨基丙烯酸乙酯、丙烯酰胺、乙烯基吡咯烷酮和去离子水,搅拌溶解,升温至70~90℃,通入N2除去装置中的空气;
S120缓慢滴加引发剂水溶液,控制滴加时间1.0~2.0h,滴加完后保温反应6~10h,反应得季铵盐型阳离子聚合物,再滴加环氧氯丙烷,继续反应4~8h,降至室温得到交联剂。
根据本发明的一实施例,在步骤S120中的各组分含量按重量份计为:25份的二甲基二烯丙基氯化铵、5份的N-(3-二烷基氨基丙基)丙烯酰胺、10份N,N-二烷基氨基丙烯酸乙酯、12~18份丙烯酰胺、5份的乙烯基吡咯烷酮和30份的去离子水。
根据本发明的一实施例,PTFE厚度为23.5μm。
根据本发明的一实施例,在步骤S300中的复合压力为5MPa,复合温度60~70℃,固化时间24h。
根据本发明的一实施例,经过复合后的层压防水织物,竹浆纤维含量为78%,涤纶低弹丝含量为22%,毛布圈规格为220g/m2,毛高2.5mm。
与现有技术相比,本发明的有益效果为:
(1)聚四氟乙烯(PTFE)树脂薄膜厚度约为23.5μm,气孔率为82%,每平方厘米有14亿个微孔,平均孔径为0.14μm,孔径范围0.2μm~5μm,小于水滴的最小直径(20μm~100μm),而远大于水蒸气分子的直径(0.0003μm~0.0004μm),使水蒸气能通过这些物理微孔通道扩散,同时水滴不能通过,具有优良的防水透湿性能。
(2)纺织面料与膜材料复合的粘合固化情况是实现面料防水透气功能的关键工序,它直接影响产品的耐静水压、透气性和耐洗涤性能等重要指标。复合温度对复合织物的拉伸性能影响较大,随着复合温度的升高,复合织物的断裂强力出现先增大后减小的趋势,且高于100℃复合而成的织物断裂强力下降明显,但断裂伸长率逐渐增大,随着复合温度的提高,复合织物的悬垂性先降低后增大。
(3)通过对固化工艺影响因素的对比分析发现:当温湿度较高时,固化率在较短的时间内就达到较高的水平;温湿度过低、时间再长也不能实现理想的固化。考虑到产业化生产讲究生产效率,固化时间不能太长,结合产业化的生产效率和能源成本,综合考虑选择。
(4)制备层压防水织物具有很好的防水性和保暖效果,这与它的透气性有关,层压防水的透气透湿量较小,能非常好的阻止外界空气和体表空气的对流,始终保持人体表面维持在一定的温度。
(5)复合后的层压防水织物性能优良,耐洗、不起泡、不脱层,具有足够的黏接牢度。
附图说明
图1是根据本发明的层压防水织物与普通涂层织物的透气量的测试图。
图2是根据本发明的悬垂性测试用织物的测试图。
图3是根据本发明的层压防水织物与普通涂层织物的悬垂性比较示意图。
具体实施方式
以下描述用于揭露本发明以使本领域技术人员能够实现本发明。以下描述中的优选实施例只作为举例,本领域技术人员可以想到其他显而易见的变型。
交联剂的合成:
首先在装有磁转子、冷凝管、温度计和恒压漏斗的三口烧瓶中,加入二甲基二烯丙基氯化铵(60%的水溶液)25份、N-(3-二烷基氨基丙基)丙烯酰胺(改良剂)5份、N,N-二烷基氨基丙烯酸乙酯10份、丙烯酰胺14.3份、乙烯基吡咯烷酮5份和去离子水30份,搅拌溶解,升温至80℃,通入N2除去装置中的空气,然后缓慢滴加引发剂水溶液,控制滴加时间1.5h,滴加完后保温反应8h,反应得季铵盐型阳离子聚合物,然后滴加环氧氯丙烷,继续反应6h,降至室温得到交联剂。
一种层压防水织物的制备方法,包括步骤:
(1)配置工作液,乙醇与交联剂之比等于1:1,配置成工作液,浸轧织物涤纶,并在120℃的条件下加热8h,烘干备用;
(2)层压复合,在上述织物表面覆上PTFE,用丙酮溶解纺织涂层交联促进剂后浸轧,然后与竹纤维纱层压无张力复合,复合压力为5MPa,复合温度60-70℃,固化时间24h,制得层压防水织物。
经过复合后的层压防水织物,竹浆纤维含量为78%,涤纶低弹丝含量为22%;毛布圈规格为220g/m2,毛高2.5mm,PTFE厚度为23.5μm。制得的层压防水织物的复合效果较好,成品主要性能测试结果见下表1。
表1成品主要性能测试结果
防水性能测试:按照AATCC 22-2010《纺织品拒水性测试喷淋法》,使用织物沾水度测定仪测试,根据喷淋测试评级图进行评分。其中100分、90分、80分、70分、50分和0分,分别表示防水等级由高到低的排列,织物表面没有润湿或者完全没有附着水珠为100分,完全湿透为0分。
选取层压防水织物和普通涂层织物各三块,测试其防水性能。层压防水织物分别用A1、A2、A3表示,普通涂层织物分别用B1、B2、B3表示,测试结果见表2所示。
表2织物防水性能测试结果
透气量测定:由于PTFE薄膜和里外层的织物相黏合,基本完全阻止了层压织物纱线之间的孔隙,阻止了织物里外层之间的空气对流,所以层压复合织物的透气量比复合前的普通织物小很多,但是却要比普通的涂层织物的透气量要好,如图1所示。
垂悬性测定:悬垂系数是指试样下垂后的投影面积与试样面积相比的百分率,如图2所示。悬垂系数越小,表示织物悬垂性越好,织物越柔软,穿着舒适。由图3可见层压防水透湿织物各方向的悬垂系数均小于普通涂层织物,表明其柔软程度比普通涂层织物好,这是因为层压防水透湿织物相对于普通涂层织物其面密度小,织物较柔软。由图3还可看出复合前后两种织物各方向的悬垂系数也不同,其中OD向都最大,这主要和织物结构有关,织物悬垂性还受纱线、原料、组织的影响,除此之外,织物的悬垂性能与织物的弯曲和剪切特性密切相关,悬垂的不稳定性与织物的弯曲和剪切滞后有关。
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是本发明的原理,在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明的范围内。本发明要求的保护范围由所附的权利要求书及其等同物界定。
Claims (5)
1.一种层压防水织物的制备方法,其特征在于,包括步骤:
S100将乙醇和交联剂按1~3:1的比例,配置成工作液,浸轧织物,并在120℃的条件下加热8h,烘干获得备用织物;
S200层压复合,在备用织物的表面覆上聚四氟乙烯,加入丙酮溶解后浸轧;
S300与竹纤维纱层压无张力复合,复合压力为5MPa,复合温度60~70℃,固化时间24h;
在步骤S100中的交联剂的制备方法,包括步骤:
S110在装有磁转子、冷凝管、温度计和恒压漏斗的三口烧瓶中,加入相应重量份的二甲基二烯丙基氯化铵、N-(3-二烷基氨基丙基)丙烯酰胺、N,N-二烷基氨基丙烯酸乙酯、丙烯酰胺、乙烯基吡咯烷酮和去离子水,搅拌溶解,升温至70~90℃,通入N2除去装置中的空气;
S120缓慢滴加引发剂水溶液,控制滴加时间1.0~2.0h,滴加完后保温反应6~10h,反应得季铵盐型阳离子聚合物,再滴加环氧氯丙烷,继续反应4~8h,降至室温得到交联剂。
2.根据权利要求1所述的制备方法,其特征在于,乙醇与交联剂之比为1:1。
3.根据权利要求2所述的制备方法,其特征在于,在步骤S120中的各组分含量按重量份计为:25份的二甲基二烯丙基氯化铵、5份的N-(3-二烷基氨基丙基)丙烯酰胺、10份N,N-二烷基氨基丙烯酸乙酯、12~18份丙烯酰胺、5份的乙烯基吡咯烷酮和30份的去离子水。
4.根据权利要求3所述的制备方法,其特征在于,PTFE厚度为23.5μm。
5.根据权利要求 4所述的制备方法,其特征在于,经过复合后的层压防水织物,竹浆纤维含量为78%,涤纶低弹丝含量为22%,毛布圈规格为220g/m2,毛高2.5mm。
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