CN112192912B - 一种具有阻燃性能的人造皮革及其制备方法和制备装置 - Google Patents

一种具有阻燃性能的人造皮革及其制备方法和制备装置 Download PDF

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CN112192912B
CN112192912B CN202010833027.4A CN202010833027A CN112192912B CN 112192912 B CN112192912 B CN 112192912B CN 202010833027 A CN202010833027 A CN 202010833027A CN 112192912 B CN112192912 B CN 112192912B
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flame
retardant
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CN112192912A (zh
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钱国春
朴钟皓
董爱学
李祥
谢高峰
钱能
林国武
赵家琪
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Zhejiang Meisheng New Materials Co ltd
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Abstract

本发明公开了一种具有阻燃性能的人造皮革,包括:人造皮革基布层,由超细纤维通过非织造制成的无纺布浸渍于弹性聚合物树脂后经超细化而制成,其纤度为0.1‑0.3旦尼尔,其透气性为50‑70L/min/10cm2;阻燃层,其包括连续的阻燃区域和均匀分布在阻燃层内的多个气孔,阻燃区域占阻燃层总面积的60‑90%;阻燃区域内涂覆有阻燃剂和粘合剂的混合物;增强层,粘接于阻燃层外侧,用于增加人造皮革的强度以保持人造皮革形状的稳定性。还公开了一种具有阻燃性能的人造皮革的制备方法,又公开了一种具有阻燃性能的人造皮革的制备装置。本发明人造皮革的水平燃烧速度为100mm/min或更低,透气性为20‑50L/min/100cm2;减少了阻燃剂和粘合剂的使用量,降低了生产成本;柔软性能出色,同时保证形态的稳定性。

Description

一种具有阻燃性能的人造皮革及其制备方法和制备装置
技术领域
本发明属于人造皮革制造技术领域,尤其是涉及一种具有阻燃性能的人造皮革及其制备方法和制备装置。
背景技术
人造皮革是由超细纤维非织造成三维结构而形成的无纺布浸渍弹性体聚合物而制成的。由于它具有类似于天然皮革的柔软质地和外观,因此被广泛用于鞋、服装、手套、箱包、家具和汽车内饰等各个领域。上述人造皮革根据所使用的用途不同,在柔韧性、表面质感特性、耐磨性、耐光性及伸长特性等方等面要具备更高的性能,有时需要同时满足上述的各种特性。
例如,当将人造皮革应用于汽车内饰上,作为包覆到汽车座椅的表面材料时,随着消费者品味的提高,需要特别优异的外观、透气性和触感的表面质量特性。同时,它还必须满足汽车法定项目中规定的阻燃性能。
为了满足阻燃性,通常需要在人造皮革浸渍或涂覆大量的阻燃剂,并且为了进一步提高人造皮革的强度和形状稳定性,必须在阻燃剂层上涂覆粘合树脂后再黏合纺织物或针织物等的增强材料。然而,在这种情况下,由于形成两个树脂层(阻燃剂层和粘合剂层),人造皮革的柔软特性会下降,并且在人造皮革中原先形成的气孔被树脂层堵塞,从而使透气性变差。
发明内容
为了克服上述现有技术的不足,本发明提供一种新的人造皮革制造技术,使其具有良好的阻燃性能,且透气性能佳,不会降人造皮革的柔软触感和强度,及形态稳定性。
本发明解决其技术问题所采用的技术方案是:一种具有阻燃性能的人造皮革,包括:
人造皮革基布层,由超细纤维通过非织造制成的无纺布浸渍于弹性聚合物树脂后经超细化而制成,其纤度为0.1-0.3旦尼尔,其透气性为50-70L/min/10cm2
还包括:
阻燃层,设于人造皮革基布层一侧,其包括连续的阻燃区域和均匀分布在阻燃层内的多个气孔,所述阻燃区域占阻燃层总面积的60-90%;
所述阻燃区域内涂覆有阻燃剂和粘合剂的混合物;
增强层,粘接于阻燃层外侧,用于增加人造皮革的强度以保持人造皮革形状的稳定性。
作为优选,所述气孔为阻燃区域内由阻燃剂和粘合剂混合物围设形成的凹槽,相邻气孔之间相互不连通。
作为优选,所述气孔的横截面为圆形或多边形或异形。
作为优选,所述混合物中阻燃剂和粘合剂的重量比为10:90-90:10,所述粘合剂为热熔树脂,所述阻燃剂为磷系阻燃剂或氮系阻燃剂;所述粘合剂为聚酯树脂、聚氨酯树脂、丙烯酸树脂、聚酰胺树脂或聚烯烃树脂中的一种或两种以上组合。
作为优选,所述阻燃区域包括进入人造皮革基布层的下部渗透层,进入增强层的上部渗透层,及围设形成气孔的中间层;所述下部渗透层为所述中间层的5-20%;所述上部渗透层和下部渗透层的厚度均为阻燃层总厚度的30-50%。
作为优选,所述增强层为纺织物层或针织物层或非织造织物层。
本发明还公开了一种具有阻燃性能的人造皮革的制备方法,包括以下步骤:
1)将阻燃剂和粘合剂于挤出机中熔融挤出,其熔融温度为100-150℃;
2)步骤1)中熔融挤出的混合物填充至印刷辊表面的凹陷内;
3)转印辊和印刷辊分别在人造皮革基布层两侧配合滚动,将混合物涂覆至人造皮革基布层的一侧表面;
4)至少一组压力辊配合滚动将增强层压制粘合在混合物上表面,即得。
进一步的,所述步骤3)中转印辊和印刷辊的挤压力为1-5kg/cm2;所述步骤4)中两个压力辊的挤压力为1-5kg/cm2
进一步的,所述步骤3)中转印辊和印刷辊的滚动速度为5-20m/min;所述步骤4)中两个压力辊的滚动速度为5-20m/min。
本发明又公开了一种具有阻燃性能的人造皮革的制备装置,包括:
转印辊,用于承托人造皮革基布层,其表面光滑;
印刷辊,与转印辊对应设置,用于将阻燃剂和粘合剂的混合物涂覆至人造皮革基布层表面,其外壁具有多个凸柱,相邻凸柱之间形成用于填充阻燃剂和粘合剂的空隙,所述凸柱经过的地方留有气孔;
至少一组压力辊,设于转印辊的后方,使得人造皮革基布层和增强层粘合成一体;
拉伸辊,用于延展增强层。
本发明的有益效果是:1)根据汽车内饰燃烧测试规定(FMVSS.No.302)测量,本发明人造皮革的水平燃烧速度为100mm/min或更低,透气性为20-50L/min/100cm2;2)减少了阻燃剂和粘合剂的使用量,降低了生产成本;3)柔软性能更佳的同时保证形态的稳定性。
附图说明
图1为本发明的人造皮革基布层涂覆阻燃层后的主视图。
图2为图1中的A-A’剖视图。
图3为本发明的制备装置的简示图。
图4为对比实施例4中人造皮革基布层涂覆阻燃层后的主视图。
图5为对比实施例5中人造皮革的剖视图。
图6为对比实施例6中人造皮革的剖视图。
图7为本发明中测量硬挺度的装置示意图。
具体实施方式
为了使本技术领域的人员更好的理解本发明方案,下面将结合本发明实施例中的附图,对发明实施例中的技术方案进行清楚、完整的描述,显然,所描述的实施例仅仅是本发明的一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都应当属于本发明保护的范围。
一种具有阻燃性能的人造皮革,也可以称为人造皮革,其包括人造皮革基布层、阻燃层和增强层,阻燃层包括连续的阻燃区域和均匀分布在阻燃层内的多个气孔,阻燃区域占阻燃层总面积的60-90%。
人造皮革基布层是由超细纤维通过非织造制成的无纺布浸渍在弹性聚合物树脂中制成。首先,通过复合纺丝工艺制造海岛纤维。海岛纤维成分可以是尼龙或聚酯,并且聚酯可以是聚对苯二甲酸乙二醇酯(PET)、聚对苯二甲酸丙二醇酯(PTT)或聚对苯二甲酸丁二醇酯(PBT);
通过切割工艺,将海岛型纤维制成短纤维,然后短纤维形式的海岛型纤维经过梳理(carding)过程和交叉铺网(cross lapping)过程形成网(web),也可以选择通过纺粘工艺(spun bonding),使用长纤维形式的岛状纤维直接形成纤网而无需切割工艺;如此形成的多个网状物使用针刺工艺或水刺工艺将彼此络合以形成无纺布;
依次进行将无纺布浸渍在弹性聚合物树脂中的步骤和使海岛纤维中的海成分超细化的步骤来完成人造皮革基布层30,选择性的也可以先把无纺布执行超细工艺,然后进行弹性聚合物树脂的浸渍工艺。
将无纺布浸渍弹性聚合物树脂中的过程可以通过涂覆(coating)过程或浸渍(dipping)过程来执行。简单易用的浸渍(dipping)过程如下:
首先,弹性聚合物树脂可以是聚氨酯树脂或硅胶树脂,聚氨酯树脂可单独使用或与聚碳酸酯二醇树脂、聚酯二醇树脂或聚醚二醇树脂组合使用。
无纺布在弹性聚合物树脂的浸渍过程可以依次进行如下步骤(将无纺布浸渍在包含弹性聚合物树脂的组合物中的工序、使弹性聚合物树脂凝结的固化工序以及在清洗槽内的清洗工序)来完成。凝结浴中包含的凝结溶液可以是含有水和二甲基甲酰胺的混合溶液。
更详细地描述超细过程如下:使用诸如液碱水溶液的碱性溶液,从由岛成分和海成分组成的复合纤维中洗脱并除去海成分,随着海成分的去除,剩余的岛成分形成超细纤维。为了得到优秀的触感,超细纤维的纤度范围优选为0.1-0.3旦尼尔。
以上,说明了利用海岛纤维制造人造皮革基布层30的方法,但本发明不限于此。
实施例1
人造皮革基布层,由超细纤维制成的无纺布浸渍于弹性聚合物树脂制成,具体制作步骤如下:
将包含摩尔百分比为5%的金属磺酸盐的聚酯单元与聚对苯二甲酸乙二醇酯作为主要成分的共聚物聚酯熔融,以制备海成分的熔融溶液。将聚对苯二甲酸乙二酯(PET)熔融以制备岛状成分的熔体。此后,使用50%重量的海组分的熔体和50%重量的岛组分的熔体来纺制复合纱线,以获得具有3旦尼尔和16个岛组分的单纱线细度的长丝。将长丝以1:3.5的拉伸比拉伸以制备长丝形式的海岛纤维。之后,使用海岛型纤维进行卷曲处理,使卷曲数为15根/英寸,在130℃下热定型,并切成51mm,从而制成短纤维形式的海岛型纤维。
此后,将海岛型短纤维通过梳理工艺和铺网工艺形成纤网,然后将纤网进行针刺工艺以制备无纺布。
之后,用5%重量的聚乙烯醇溶液浸轧无纺布并干燥,将聚氨酯溶解在二甲基甲酰胺(DMF)溶剂中获得浓度为12%(owf)的聚氨酯溶液,将上述烘干后的无纺布浸入聚氨酯溶液中,浸渍时间为3分钟,浸渍温度为25℃。之后,将浸渍有聚氨酯溶液的无纺布在二甲基甲酰胺水溶液中以15%重量的浓度凝结,并用水洗涤,从而得到浸渍有聚氨酯的无纺布。
之后,用液碱水溶液浸渍处理无纺布,以洗脱复合纤维中的海成分以进行超细处理,处理至其纤度为0.3旦尼尔,从而获得单位重量为363.2g/m2,厚度为1.00mm,具有39L/min/100cm2的透气性的人造皮革基布层30。
阻燃层包括连续的阻燃区域和均匀分布在阻燃区域内的多个气孔,也就是说气孔没有覆盖阻燃材料,阻燃区域占阻燃层总面积的65%,阻燃区域内设有阻燃剂和粘合剂的混合物,定义该混合物为阻燃粘合剂组合物;
上述面积的测量可以选择任意点的人造皮革以制备尺寸为50×50厘米的样品,然后使用图像分析仪(使用Image-Pro Plus软件中的JVC数码相机KY-F70B)拍摄样品表面。通过面积分析程序测量阻燃粘合剂组合物层10的面积比。此时,使用了5个样品,对每个测量结果进行算术平均值,最后,获得阻燃粘合剂组合物层10的面积比。
1)将混合有60%重量的湿气硬化型热熔PU树脂和40%重量的聚磷酸铵粉末的阻燃粘合剂组合物200在130℃下用挤出机100熔融;
2)熔融挤出的阻燃粘合剂组合物填充至印刷辊300表面的凹陷内,因此相邻的气孔之间相互独立、不相连通;
印刷辊300的外壁形成多个均匀布设的凸柱,相邻凸柱之间形成上述的凹陷空隙,从而由阻燃剂和粘合剂混合组成的阻燃粘合剂组合物填充在空隙内;
凸柱的横截面可以是圆形或多边形或异形结构,从而气孔的横截面与凸柱的横截面相同,可以是圆形或多边形或异形。
根据涂覆量达到42.1g/m2为标准设置凸柱的数量,以控制凹陷空隙的体积。
3)转印辊400和印刷辊300分别在人造皮革基布层两侧配合滚动,其中印刷辊300的温度维持在125℃,同时人造皮革基布层30通过转印辊400和印刷辊300时施加的压力为1kg/cm2,从而在人造皮革基布层30上形成具有65%面积比的阻燃粘合剂组合物层10。
增强层通过阻燃层粘接,其用于增加人造皮革的强度,使得人造皮革具有稳定的形态,其可以选用纺织物层或针织物层或非织造织物层等,同时空气仍然可以透过增强层进入气孔,透气性能得到保持。
4)接下来是将增强层40和人造皮革基布层30接合的步骤,如图3所示,将经纱和纬纱都是200D/96F DTY的以3/1斜纹结构织成的增强层40和人造皮革基布层30通过使用一组压力辊500在压力1kg/cm2和温度125℃的条件下施压粘合的方法制得了人造皮革;
为了使得增强层40能够平整,可以在其中一个压力辊500的前方设置拉伸辊,用于配合该压力辊500拉伸延展增强层40。
由于印刷辊300、转印辊400和压力辊500的带压力辊压,阻燃层部分渗透进入人造皮革基布层30、部分渗透进入增强层40,定义阻燃层为d,阻燃层进入人造皮革基布层30的部分为下部渗透层b,进入增强层40的部分为上部渗透层a,围设形成气孔20的中间层为c。则本实施例中,中间层占阻燃层总厚度的32%,即c/d=0.32;上部渗透层为阻燃层总厚度的33%,即a/d=0.33;下部渗透层为阻燃层总厚度的35%,即b/d=0.35。
上述厚度可以利用电子显微镜(SEM)扫描测量。具体来说,在人造皮革的横截面SEM图像中,选择任意两个点,以使间隔为1000μm,在这两点上测得了阻燃粘合剂组合物层10的平均厚度d,阻燃粘合剂组合物层10的增强层40内部的平均渗透深度a,阻燃粘合剂组合物层10的人造皮革基布层30内部的平均渗透深度b及阻燃粘合剂组合物层10的中间层的厚度c。总共对五个样品进行了测量,将测量结果进行算术平均。
阻燃粘合剂组合物的涂布量(g/m2)由形成阻燃粘合剂组合物层10之前的人造皮革基布层30的重量与形成阻燃粘合剂组合物层10之后的人造皮革的重量之差求出。
实施例2
人造皮革基布层,由超细纤维制成的无纺布浸渍于弹性聚合物树脂制成了具体制作步骤如下:
将包含摩尔百分比为5%的金属磺酸盐的聚酯单元与聚对苯二甲酸乙二醇酯作为主要成分的共聚物聚酯熔融,以制备海成分的熔融溶液。将聚对苯二甲酸乙二酯(PET)熔融以制备岛状成分的熔体。此后,使用50%重量的海组分的熔体和50%重量的岛组分的熔体来纺制复合纱线,以获得具有5旦尼尔和37个岛组分的单纱线细度的长丝。将长丝以1:3.5的拉伸比拉伸以制备长丝形式的海岛纤维。之后,使用海岛型纤维进行卷曲处理,使卷曲数为15根/英寸,在130℃下热定型,并切成51mm,从而制成短纤维形式的海岛型纤维。
此后,将海岛型短纤维通过梳理工艺和铺网工艺形成纤网,然后将纤网进行针刺工艺以制备无纺布。
之后,用5%重量的聚乙烯醇溶液浸轧无纺布并干燥,将聚氨酯溶解在二甲基甲酰胺(DMF)溶剂中获得浓度为12%(owf)的聚氨酯溶液,将上述烘干后的无纺布浸入聚氨酯溶液中,浸渍时间为3分钟,浸渍温度为25℃。之后,将浸渍有聚氨酯溶液的无纺布在二甲基甲酰胺水溶液中以15%重量的浓度凝结,并用水洗涤,从而得到浸渍有聚氨酯的无纺布。
之后,用液碱水溶液浸渍处理无纺布,以洗脱复合纤维中的海成分以进行超细处理,处理至其纤度为0.2旦尼尔,从而获得单位重量为362.2g/m2,厚度为1.00mm,具有31L/min/100cm2的透气性的人造皮革基布层30。
阻燃层包括连续的阻燃区域和均匀分布在阻燃区域内的多个气孔,也就是说气孔没有覆盖阻燃材料,阻燃区域占阻燃层总面积的72%,阻燃区域内设有阻燃剂和粘合剂的混合物,定义该混合物为阻燃粘合剂组合物;
1)将混合有50%重量的湿气硬化型热熔PU树脂和5%重量的聚磷酸铵粉末的阻燃粘合剂组合物200在150℃下用挤出机100熔融;
2)熔融挤出的阻燃粘合剂组合物填充至印刷辊300表面的凹陷内,因此相邻的气孔之间相互独立、不相连通;
印刷辊300的外壁形成多个均匀布设的凸柱,相邻凸柱之间形成上述的凹陷空隙,从而由阻燃剂和粘合剂混合组成的阻燃粘合剂组合物填充在空隙内;
凸柱的横截面可以是圆形或多边形或异形结构,从而气孔的横截面与凸柱的横截面相同,可以是圆形或多边形或异形。
根据涂覆量达到46.3g/m2为标准设置凸柱的数量,以控制凹陷空隙的体积。
3)转印辊400和印刷辊300分别在人造皮革基布层两侧配合滚动,其中印刷辊300的温度维持在150℃,同时人造皮革基布层30通过转印辊400和印刷辊300时施加的压力为2.8kg/cm2,从而在人造皮革基布层30上形成具有72%面积比的阻燃粘合剂组合物层10。
增强层通过阻燃层粘接,其用于增加人造皮革的强度,使得人造皮革具有稳定的形态,其可以选用纺织物层或针织物层或非织造织物层等。
4)接下来是将增强层40和人造皮革基布层30接合的步骤,将经纱和纬纱都是200D/96F DTY的以3/1斜纹结构织成的增强层40和人造皮革基布层30通过使用一组压力辊500在压力1kg/cm2和温度150℃的条件下施压粘合的方法制得了人造皮革;
为了使得增强层40能够平整,可以在其中一个压力辊500的前方设置拉伸辊,用于配合该压力辊500拉伸延展增强层。
由于印刷辊300、转印辊400和压力辊500的带压力辊压,阻燃层部分渗透进入人造皮革基布层30、部分渗透进入增强层40,定义阻燃层为d,阻燃层进入人造皮革基布层30的部分为下部渗透层b,进入增强层40的部分为上部渗透层a,围设形成气孔20的中间层为c。则本实施例中,中间层占阻燃层总厚度的24%,即c/d=0.24;上部渗透层为阻燃层总厚度的35%,即a/d=0.35;下部渗透层为阻燃层总厚度的41%,即b/d=0.41。
实施例3
人造皮革基布层,由超细纤维制成的无纺布浸渍于弹性聚合物树脂制成了具体制作步骤如下:
将包含摩尔百分比为5%的金属磺酸盐的聚酯单元与聚对苯二甲酸乙二醇酯作为主要成分的共聚物聚酯熔融,以制备海成分的熔融溶液。将聚对苯二甲酸乙二酯(PET)熔融以制备岛状成分的熔体。此后,使用50%重量的海组分的熔体和50%重量的岛组分的熔体来纺制复合纱线,以获得具有5旦尼尔和72个岛组分的单纱线细度的长丝。将长丝以1:3.5的拉伸比拉伸以制备长丝形式的海岛纤维。之后,使用海岛型纤维进行卷曲处理,使卷曲数为15根/英寸,在130℃下热定型,并切成51mm,从而制成短纤维形式的海岛型纤维。
此后,将海岛型短纤维通过梳理工艺和铺网工艺形成纤网,然后将纤网进行针刺工艺以制备无纺布。
之后,用5%重量的聚乙烯醇溶液浸轧无纺布并干燥,将聚氨酯溶解在二甲基甲酰胺(DMF)溶剂中获得浓度为12%(owf)的聚氨酯溶液,将上述烘干后的无纺布浸入聚氨酯溶液中,浸渍时间为3分钟,浸渍温度为25℃。之后,将浸渍有聚氨酯溶液的无纺布在二甲基甲酰胺水溶液中以15%重量的浓度凝结,并用水洗涤,从而得到浸渍有聚氨酯的无纺布。
之后,用液碱水溶液浸渍处理无纺布,以洗脱复合纤维中的海成分以进行超细处理,处理至其纤度为0.1旦尼尔,从而获得单位重量为360.2g/m2,厚度为1.00mm,具有22L/min/100cm2的透气性的人造皮革基布层30。
阻燃层包括连续的阻燃区域和均匀分布在阻燃区域内的多个气孔,也就是说气孔没有覆盖阻燃材料,阻燃区域占阻燃层总面积的88%,阻燃区域内设有阻燃剂和粘合剂的混合物,定义该混合物为阻燃粘合剂组合物;
1)将混合有35%重量的湿气硬化型热熔PU树脂和65%重量的聚磷酸铵粉末的阻燃粘合剂组合物200在120℃下用挤出机100熔融;
2)熔融挤出的阻燃粘合剂组合物填充至印刷辊300表面的凹陷内,因此相邻的气孔之间相互独立、不相连通;
印刷辊300的外壁形成多个均匀布设的凸柱,相邻凸柱之间形成上述的凹陷空隙,从而由阻燃剂和粘合剂混合组成的阻燃粘合剂组合物填充在空隙内;
凸柱的横截面可以是圆形或多边形或异形结构,从而气孔的横截面与凸柱的横截面相同,可以是圆形或多边形或异形。
根据涂覆量达到53.0g/m2为标准设置凸柱的数量,以控制凹陷空隙的体积。
3)转印辊和印刷辊分别在人造皮革基布层两侧配合滚动,其中印刷辊300的温度维持在135℃,同时人造皮革基布层30通过转印辊400和印刷辊300时施加的压力为5kg/cm2,从而在人造皮革基布层30上形成具有88%面积比的阻燃粘合剂组合物层10。
增强层通过阻燃层粘接,其用于增加人造皮革的强度,使得人造皮革具有稳定的形态,其可以选用纺织物层或针织物层或非织造织物层等。
4)接下来是将增强层40和人造皮革基布层30接合的步骤,将经纱和纬纱都是200D/96F DTY的以3/1斜纹结构织成的增强层40和人造皮革基布层30通过使用一组压力辊500在压力5kg/cm2和温度115℃的条件下施压粘合的方法制得了人造皮革;
为了使得增强层40能够平整,可以在其中一个压力辊500的前方设置拉伸辊,用于配合该压力辊500拉伸延展增强层。
由于印刷辊300、转印辊400和压力辊500的带压力辊压,阻燃层部分渗透进入人造皮革基布层30、部分渗透进入增强层40,定义阻燃层为d,阻燃层进入人造皮革基布层30的部分为下部渗透层b,进入增强层40的部分为上部渗透层a,围设形成气孔20的中间层为c。则本实施例中,中间层占阻燃层总厚度的20%,即c/d=0.20;上部渗透层为阻燃层总厚度的37%,即a/d=0.37;下部渗透层为阻燃层总厚度的43%,即b/d=0.43。
比较实施例4
如图4所示,于本实施例中,气孔的位置和阻燃区域的位置互换,也就是阻燃区域不连续,即阻燃粘合剂组合物层由具有预定形状的多个离散的单元组成,此时不能形成一个有效的阻燃通道,未涂覆区域容易沿着连续形成的气孔燃烧,阻燃性能下降。
比较实施例5
将由55%固含量的磷酸铵(ammonium polyphosphate)系列的磷系阻燃剂及40%固含量的聚氨酯类水性粘合剂以及增稠剂以100:100:1重量比配制而成的阻燃粘合剂组合物按照如图1所示的形状按预备人造皮革面积的60%比例涂覆后复合上述增强材料,在120℃温度下干燥10分钟后,制得人造皮革。涂覆上述阻燃组成物及复合增强材料时印刷辊和加压辊维持在常温,压力与实施例1相同。
比较实施例6
如图5所示,本实施例与实施例1的不同之处在于,阻燃区域内设有阻燃剂,再在阻燃剂上附着粘合剂,此时粘合剂涂覆到整个表面上,将气孔遮挡。
于本实施例中,粘合剂为湿气硬化型热熔PU树脂。
比较实施例7
如图6所示,本实施例与实施例1的不同之处在于,阻燃区域内设有阻燃剂,再在阻燃剂上附着粘合剂,此时粘合剂将部分气孔遮挡堵塞。
于本实施例中,粘合剂为湿气硬化型热熔PU树脂。
结果讨论
Figure GDA0002753269560000111
其中,透气性根据ASTM D 737中指定的Frazier试验方法测量,水平燃烧速度根据汽车内饰材料燃烧测试规定(FMVSS.302)测量,剥离强度通过GB/8808-1988软质复合塑料材料剥离测试方法进行测量。
硬挺度通过是ASTM D 1388的option A,cantilever方法测量的。准备一个宽度为25mm,长度为200mm的测试件,并使用如图7所示的测量装置,在一端倾斜角度为41.5°的表面平滑的水平表面上用与试件相同尺寸的压板压紧试件,然后以120mm/分钟的速度沿倾斜方向滑动,测得当试件的一端与倾斜表面接触时的试件的行进距离(mm),数值越小表示更柔软。
从表格中可以看出,利用本发明的阻燃层设计,以及利用压辊转移涂覆的方法实现阻燃层和人造皮革基布层、增强层的粘合,达到一定的渗透效果,不仅粘合牢固度得到保证,而且阻燃效果更佳;同时在阻燃层利用阻燃区域形成独立的气孔,通过阻燃粘合剂组合物在人造皮革基布层围设形成相互独立的气孔,空气可以通过气孔进行自由流通,保证良好的透气性;与此同时,还具有良好的硬挺度,形态稳定。
上述具体实施方式用来解释说明本发明,而不是对本发明进行限制,在本发明的精神和权利要求的保护范围内,对本发明作出的任何修改和改变,都落入本发明的保护范围。

Claims (5)

1.一种具有阻燃性能的人造皮革,包括:
人造皮革基布层,由超细纤维通过非织造制成的无纺布浸渍于弹性聚合物树脂后经超细化而制成,其纤度为0.3旦尼尔,其透气性为39 L/min/10cm2
其特征在于还包括:
阻燃层,设于人造皮革基布层一侧,其包括连续的阻燃区域和均匀分布在阻燃层内的多个气孔,所述阻燃区域占阻燃层总面积的65%;
所述阻燃区域内涂覆有阻燃剂和粘合剂的混合物;
所述阻燃区域内涂覆有阻燃剂和粘合剂的混合物,其为混合有60%重量的湿气硬化型热熔PU树脂和40%重量的聚磷酸铵粉末的阻燃粘合剂组合物;
所述阻燃区域包括进入人造皮革基布层的下部渗透层,进入增强层的上部渗透层,及围设形成气孔的中间层;中间层占阻燃层总厚度的 32%;上部渗透层为阻燃层总厚度的33%;下部渗透层为阻燃层总厚度的35%;
增强层,粘接于阻燃层外侧,用于增加人造皮革的强度以保持人造皮革形状的稳定性;增强层和阻燃层的剥离强度为31N;
上述人造皮革的制备方法,包括以下步骤:
1)将阻燃剂和粘合剂于挤出机中熔融挤出,其熔融温度为130℃;
2)步骤1)中熔融挤出的混合物填充至印刷辊表面的凹陷内;
3)转印辊和印刷辊分别在人造皮革基布层两侧配合滚动,将混合物涂覆至人造皮革基布层的一侧表面;
4)一组压力辊配合滚动将增强层压制粘合在混合物上表面,即得;所述步骤3)中转印辊和印刷辊的挤压力为1kg/cm2;所述步骤4)中两个压力辊的挤压力为1kg/cm2
所述步骤3)中转印辊和印刷辊的滚动速度为5-20m/min;所述步骤4)中两个压力辊的滚动速度为5-20m/min。
2.根据权利要求1所述的具有阻燃性能的人造皮革,其特征在于:所述气孔为阻燃区域内由阻燃剂和粘合剂混合物围设形成的凹槽,相邻气孔之间相互不连通。
3.根据权利要求2所述的具有阻燃性能的人造皮革,其特征在于:所述气孔的横截面为圆形或多边形或异形。
4.根据权利要求1所述的具有阻燃性能的人造皮革,其特征在于:所述增强层为针织物层或非织造织物层。
5.根据权利要求1所述的具有阻燃性能的人造皮革,其特征在于,由以下制备装置制备而成:
转印辊,用于承托人造皮革基布层,其表面光滑;
印刷辊,与转印辊对应设置,用于将阻燃剂和粘合剂的混合物涂覆至人造皮革基布层表面,其外壁具有多个凸柱,相邻凸柱之间形成用于填充阻燃剂和粘合剂的空隙,所述凸柱经过的地方留有气孔;
至少一组压力辊,设于转印辊的后方,使得人造皮革基布层和增强层粘合成一体;
拉伸辊,用于延展增强层。
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