CN107964802B - 一种桔瓣型人工皮革及其制备方法 - Google Patents

一种桔瓣型人工皮革及其制备方法 Download PDF

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CN107964802B
CN107964802B CN201711068089.5A CN201711068089A CN107964802B CN 107964802 B CN107964802 B CN 107964802B CN 201711068089 A CN201711068089 A CN 201711068089A CN 107964802 B CN107964802 B CN 107964802B
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张晓良
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Jiangsu Shangke Polymer New Mateirals Co ltd
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Abstract

本发明涉及一种桔瓣型人工皮革及其制备方法,它包括高分子弹性体基体、设置于所述高分子弹性体基体内的极细纤维、形成在所述高分子弹性体基体表面且由所述极细纤维构成的绒毛层以及形成在所述绒毛层中的块状熔着点;所述极细纤维为桔瓣型复合纤维,所述块状熔着点由低熔点纤维形成,其为聚酯或共聚聚酯。它具有耐磨性好、尺寸稳定、色牢度好、力学性能优良,可用在鞋面革、汽车内饰材料、家具用革等。

Description

一种桔瓣型人工皮革及其制备方法
技术领域
本发明涉及一种人工皮革,具体涉及一种桔瓣型人工皮革及其制备方法。
背景技术
目前,国内外生产的超细纤维人工革,大多是以海岛超细纤维为原料,通过开松、铺网工艺制成无纺布后,经浸轧聚氨酯PU涂料、碱处理、磨毛、染色、整理加工制成。在纤维分离时采用溶离法,即双组份纤维通过溶去海组分而形成超细纤维。这种溶离法目前最常用的是甲苯减量或碱减量工艺,会产生大量的有机废水,不仅造成了一定的环境污染,也增加了生产成本。
针对超细纤维人工皮革工艺存在的污染问题,采用裂离法形成的桔瓣型超细纤维是一种可行性的解决方案。桔瓣型超细纤维是通过机械或者加热的方法使复合纤维的双组份进行分离,该方法最大的优势是没有污染,且成本较低。日本钟纺和帝人公司将裂离型短纤维,经梳理成网、水刺固网后使之分裂获得0.1D左右的超纤纤维非织造布,在经聚氨酯制革工艺制备超细纤维合成革。该方法解决了减量过程中产生的甲苯或碱液等废气废水污染。
目前用于汽车内饰和家具上的人工皮革对耐磨性有着较高的要求,现有技术中通常是提高聚氨酯PU的含量而实现。但是通过这种方法,会使皮革的硬度提高,柔软性下降,在一些高档用材质上的应用受到限制。另一方面,聚氨酯的制造工艺复杂,价格昂贵以及在浸轧工艺中会使用有机溶剂,对环境造成污染等一系列问题。聚氨酯含量降低时,皮革的物性下降。特别是在5wt%含量以下时,皮革的耐磨性显著下降,很难得到有实际用途的耐磨性皮革。对此,日本专利(JP2005226213(A))中公开通过增无纺布中的纤维络合性来提高皮革的物性,降低聚氨酯的使用含量。但是该方法,会造成皮革表面不平整,有凸凹状态形成,在高品质表面要求的皮革商品上应用有一定的局限。
发明内容
本发明目的是为了克服现有技术的不足而提供一种桔瓣型人工皮革。
为解决以上技术问题,本发明采取的一种技术方案是:一种桔瓣型人工皮革,它包括高分子弹性体基体、设置于所述高分子弹性体基体内的极细纤维、形成在所述高分子弹性体基体表面且由所述极细纤维构成的绒毛层以及形成在所述绒毛层中的块状熔着点;所述极细纤维为桔瓣型复合纤维,所述块状熔着点由低熔点纤维形成,其为聚酯或共聚聚酯。
优化地,所述高分子弹性体为聚氨酯。
优化地,所述桔瓣型复合纤维的纤度为0.003D~1.0D;更优选为,所述桔瓣型复合纤维的纤度为0.05D~0.35D。
优化地,所述桔瓣型复合纤维的双组份为聚酯和尼龙。
本发明的又一目的在于提供一种上述桔瓣型人工皮革的制备方法,它包括以下步骤:
(a)通过双组份纺丝设备制备桔瓣型复合纤维;
(b)将所述桔瓣型复合纤维与低熔点纤维混合后梳理铺网,再经针刺机抱合加工形成复合无纺布;所述低熔点纤维为聚酯、共聚聚酯、聚丙烯、尼龙或聚乙烯,其在复合无纺布中的质量含量为0.1~1%、熔点为120℃~230℃;
(c)对所述复合无纺布进行高分子弹性体浸轧、磨毛、染色和整理即可。
本发明带来的有益效果是:本发明桔瓣型人工皮革,通过将桔瓣型复合纤维与低熔点纤维混合后梳理铺网形成复合无纺布,再进行高分子弹性体浸轧等得到人工皮革,具有耐磨性好、尺寸稳定、色牢度好、力学性能优良,可用在鞋面革、汽车内饰材料、家具用革等。
具体实施方式
本发明桔瓣型人工皮革,它包括高分子弹性体基体、设置于所述高分子弹性体基体内的极细纤维、形成在所述高分子弹性体基体表面且由所述极细纤维构成的绒毛层以及形成在所述绒毛层中的块状熔着点;所述极细纤维为桔瓣型复合纤维,所述块状熔着点由低熔点纤维形成,其为聚酯或共聚聚酯。制得的人工皮革具有耐磨性好、尺寸稳定、色牢度好、力学性能优良,可用在鞋面革、汽车内饰材料、家具用革等。
所述高分子弹性体为聚氨酯。所述桔瓣型复合纤维的纤度为0.003D~1.0D,优选为0.05D~0.35D;这样的纤维具有较好的耐磨性并且制得的人工皮革手感较好。所述桔瓣型复合纤维的双组份为聚酯和尼龙;它是16瓣或32瓣的分裂型桔瓣双组分纤维,是通过双组分纺丝设备制备而成:首先将两种聚合物切片分别导入干燥塔里进行预结晶和干燥处理,经螺杆挤出机挤压熔融后,经过滤器后进入纺丝箱体;然后采用桔瓣型纺丝组件,经空气冷却成丝条状后,拉伸而成。
上述桔瓣型人工皮革的制备方法,它包括以下步骤:(a)通过双组份纺丝设备制备桔瓣型复合纤维;(b)将所述桔瓣型复合纤维与低熔点纤维混合后梳理铺网,再经针刺机抱合加工形成复合无纺布;所述低熔点纤维为聚酯、共聚聚酯、聚丙烯、尼龙或聚乙烯,其在复合无纺布中的质量含量为0.1~1%、熔点为120℃~230℃;(c)对所述复合无纺布进行高分子弹性体浸轧、磨毛、染色和整理即可。而复合无纺布的制备工艺具体是:将桔瓣型纤维和低熔点纤维在纺粘设备上经混合、铺网,经预加湿后进入水刺区,在水流的压力作用下纤维开纤并缠结在一起;经烘干、切边、卷绕成卷,形成三组分超细纤维纺粘水刺无纺布。
下面将对本发明优选实施方案进行详细说明:
实施例1
本实施例提供一种桔瓣型人工皮革,它包括高分子弹性体基体、设置在高分子弹性体基体内的极细纤维、形成在高分子弹性体基体表面且由极细纤维构成的绒毛层以及形成在绒毛层中的块状熔着点;极细纤维为桔瓣型复合纤维,块状熔着点由低熔点纤维(聚酯)形成;该桔瓣型人工皮革的制备方法,包括以下步骤:
(a)将两种聚合物(PET和PA,质量比为70:30)切片分别导入干燥塔里进行预结晶和干燥处理,经螺杆挤出机挤压熔融后,经过滤器后进入纺丝箱体;然后采用16桔瓣型纺丝组件,经空气冷却成丝条状后,拉伸形成桔瓣型复合纤维(具体可参考现有的桔瓣纤维制备参数);
(b)将上述的桔瓣型复合纤维(桔瓣型纤维的纤度为0.35D)与低熔点纤维(聚酯纤维,绍兴喜能,PET,熔点为220℃),按照重量比99.9:0.1进行混合,然后经梳理铺网形成网状纤维薄层、通过针刺机(或水刺机)对纤维层进行开纤、抱合加工成无纺布;制得的无纺布克重为200g/m2
(c)将制得的纤维层与聚氨酯按质量比85:15的比例进行无纺布浸渍(将复合无纺布在聚氨酯的DMF溶液中浸渍,聚氨酯的浓度约为30wt%)经115~130℃干燥定型形成仿麂皮基布,采用带式磨皮机进行预磨皮处理,达到所要面料的表皮绒感,然后进行染色加工、整理即可。
实施例2
本实施例提供一种桔瓣型人工皮革,它与实施例1中的基本一致,不同的是:PET和PA的质量比为60:40,低熔点纤维选用芯鞘复合型聚酯纤维,鞘成分熔点为180℃;桔瓣型复合纤维(桔瓣型纤维的纤度为0.05D)与低熔点纤维按照重量比99.5:0.5进行混合,然后经梳理铺网形成网状纤维薄层、通过针刺机对纤维层进行抱合加工成无纺布,无纺布的克重为150g/m2
实施例3
本实施例提供一种桔瓣型人工皮革,它与实施例1中的基本一致,不同的是:PET和PA的质量比为50:50,低熔点纤维选用芯鞘复合型聚酯纤维,鞘成分熔点为120℃;桔瓣型复合纤维(桔瓣型纤维的纤度为0.15D)与低熔点纤维按照重量比99.3:0.7进行混合,然后经梳理铺网形成网状纤维薄层、通过针刺机对纤维层进行抱合加工成无纺布,无纺布的克重为200g/m2
实施例4
本实施例提供一种桔瓣型人工皮革,它与实施例1中的基本一致,不同的是:低熔点纤维选用芯鞘复合型聚酯纤维,鞘成分熔点为180℃;桔瓣型复合纤维(桔瓣型纤维的纤度为0.2D)与低熔点纤维按照重量比99.0:1.0进行混合,然后经梳理铺网形成网状纤维薄层、通过针刺机对纤维层进行抱合加工成无纺布,无纺布的克重为200g/m2
对比例1
本例提供一种人工皮革,它与实施例1中的基本一致,不同的是:未使用低熔点纤维。
表1 实施例1-4、对比例1中人工皮革的原理配比和耐磨等级数据表
Figure 750027DEST_PATH_IMAGE002
注:克重:根据JIS L 1096的规定,测定人造皮革的克重;
耐磨耗性试验:
根据JIS L 1096法的规定,测定人造皮革的耐磨耗性,摩擦次数设为20000次,以摩擦后的重量减少率为基准分为5等级进行判定。以重量减少率(%)={(原布重量-摩擦后重量)/(原布重量)}×100表示,重量减少率为4%以上时评价为3等级以下,2%以上且小于4%时评价为4等级,小于2%时评价为5等级。
上述实施例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰,都应涵盖在本发明的保护范围之内。

Claims (1)

1.一种桔瓣型人工皮革,其特征在于:它包括高分子弹性体基体、设置于所述高分子弹性体基体内的极细纤维、形成在所述高分子弹性体基体表面且由所述极细纤维构成的绒毛层以及形成在所述绒毛层中的块状熔着点;所述极细纤维为桔瓣型复合纤维形成,所述桔瓣型复合纤维的纤度为0.05D~0.35D,所述桔瓣型复合纤维的双组份为聚酯和尼龙;所述块状熔着点由低熔点纤维形成,其为PET;所述高分子弹性体基体为聚氨酯;
所述桔瓣型人工皮革的制备方法,包括以下步骤:
(a)通过双组份纺丝设备制备桔瓣型复合纤维;
(b)将所述桔瓣型复合纤维与低熔点纤维混合后梳理铺网,再经针刺机抱合加工形成复合无纺布;所述低熔点纤维为PET,其在复合无纺布中的质量含量为0.1~1%、熔点为120℃~230℃;
(c)对所述复合无纺布进行高分子弹性体浸轧、磨毛、染色和整理即可。
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