CN115304800A - 一种高阻燃性连续纤维增强尼龙6复合材料及制备方法 - Google Patents
一种高阻燃性连续纤维增强尼龙6复合材料及制备方法 Download PDFInfo
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Abstract
本发明提供了一种高阻燃性连续纤维增强尼龙6复合材料的制备方法,所述原料制备方法按质量份数包括:尼龙6树脂1为20~65%,阻燃剂10~45%、尼龙6树脂2为5~30%、无机材料5~20%、助剂0~5%。所制备的复合材料由原料与50%~70%的连续玻璃纤维通过熔融浸渍法生产而得,再经过热压成型的工艺方法,制备出阻燃,轻质,抗冲,高模量的实心板。本发明原料简单易得,方法操作简单,生产符合汽车和电子零部件行业的节能环保、小型轻量化发展趋势,拥有广阔的市场应用前景,尤其在轨道交通行业中其阻燃标准等达到EN45545标准。
Description
技术领域
本发明涉及尼龙6复合材料技术领域,具体提供一种高阻燃性连续纤维增强尼龙6复合材料及制备方法。
背景技术
聚酰胺(PA)是聚酰胺树脂的统称,是目前行业中用量最大的工程塑料,PA树脂分为PA6、PA66、PA610、PA1010、PA612等。占比最大的就是PA6和PA66,用量大约在90%以上。本发明采用PA6树脂作为基体树脂,它的熔点较低,而且工艺温度范围很宽。与其他工程塑料相比,它的机械强度高、抗冲击性好、耐磨耐油、抗溶解性较好,但吸湿性也较强。为了进一步增强PA6的强度和适用范围,在实际生产中一般与纤维结合生产制品,是当下热塑复合材料的热门产品之一。
热塑性复合材料,因其重量轻、抗冲击和韧性好、疲劳强度高、生产过程环保、可回收、生产效率高等诸多优势,是目前国家大力提倡的重点产业。玻璃纤维增强热塑性复合材料中根据生产工艺不同,玻璃纤维分为短切玻璃纤维,长玻纤,连续玻纤。连续纤维增强热塑性复合材料与传统的热塑性复合材料主要区别在于,前者的纤维在整个材料体系中是连续存在的,而后者中纤维是不连续的,所以连续纤维增强热塑性复合材料的各项力学性能比非连续纤维增强热塑性复合材料要优异。CFRTP——连续玻璃纤维增强热塑性复合材料以连续玻璃纤维为增强纤维,采用特种工艺将树脂与连续玻璃纤维进行复合浸润,得到一种树脂/纤维预浸带,然后热塑成型得到复合材料。具备良好机械性能,电绝缘性,密封性,可广泛应用于车体轻量化,高耐候,阻燃,耐磨,抗折弯,高抗冲击,高透波等结构件。设计和开发新型连续纤维增强热塑性复合材料是目前复合材料行业研究的热点。产品广泛应用于航空航天、汽车船舶、轨道交通、城市基建、体育休闲等领域。与钢材相比,热塑性复合材料具有重量轻,强度高,抗腐蚀,易更换等优点.与热固性复合材料比较而言,具有良好的耐低温韧性及其安全可靠性.
对于PA6纯树脂来说,本身具有一定的阻燃性能,甚至可以离火自息,达到UL94 V-2等级。但是与玻璃纤维结合制成复合材料之后,由于“灯芯效应”,它的阻燃效果也就不明显,并且为了达到轨道交通行业中EN45545 R1标准,因此需要对PA6进行阻燃改性。
发明内容
在如今倡导环保经济的时代,人们逐渐对阻燃制品的研究更加谨慎,因此本发明制备了一种原料简单,操作方便,阻燃效果强的产品。
尼龙6:常见的工程塑料,尼龙6比PP硬度、刚性、耐磨性、吸水性都高,阻燃性可以达到UL94 V-2。
本发明的目的是:提供一种高强度高阻燃连续纤维增强尼龙6复合材料及其制备方法,它不仅解决了尼龙6易于燃烧的问题,并且有效提高了产品的力学性能,环保效果好,同时解决了轨道交通行业中阻燃性问题,且制备方法简单易行,以克服现有技术的不足。
本发明的技术任务是针对上述存在的问题,提供一种高阻燃性连续纤维增强尼龙6复合材料及制备方法。
一方面,本发明提供了如下技术方案:
一种高阻燃性连续纤维增强尼龙6复合材料制备方法,所述制备方法的实现包括:
将尼龙6树脂1、阻燃剂、尼龙6树脂2、无机材料、多功能综合助剂混合后造粒,通过熔融浸渍工艺与连续纤维浸渍制成所述高阻燃性连续纤维增强尼龙6复合材料。
现有产品是尼龙6树脂加相容剂在混料机混合均匀后,直接上机生产。
现有的产品尼龙6树脂只有微小的阻燃性能;
本发明先混合造粒,后熔融浸渍,其作用是:
(1)使材料混合更加均匀,
(2)造粒后便于存放,适合后期产品的大量生产,提高生产效率。
(3)便于生产,高阻燃性尼龙6配方的物料多而杂,不但有粒料还有粉料,先混合造粒方便生产。改变之后,达到了轨道交通行业欧盟EN45545 R1 HL2阻燃标准。
所述尼龙6树脂1、阻燃剂、尼龙6树脂2、无机材料、多功能综合助剂混合物中各成分的重量百分含量为尼龙6树脂1为20~65%,阻燃剂20~40%、尼龙6树脂2为5~20%、无机材料10~15%、多功能综合助剂0~5%。
所述尼龙6树脂1、阻燃剂、尼龙6树脂2、无机材料、多功能综合助剂混合物的重量百分含量为30-50%;
所述连续纤维的重量百分含量为50-70%。
所述方法的实现步骤如下:
(1)将尼龙6树脂1和将尼龙6树脂2在80~100℃干燥2~4 h;
将20~65%尼龙6树脂1、20~40%阻燃剂、5~20%尼龙6树脂2、10~15%无机材料、0~5%多功能综合助剂置于混料机中充分混合,混合温度为60~100℃,混合时间为20~40min,得到混合好的物料;
(2)将混合好的物料送入双螺杆挤出机中,挤出造粒、干燥;
(3)将相互平行的单向连续纤维经熔融浸渍工艺,与熔融的造粒物料浸渍制成所述高阻燃性连续纤维增强尼龙6复合材料。
所述尼龙6树脂1为高粘度树脂,粘度在2.4~2.8。
所述尼龙6树脂2为低粘度树脂,粘度在2.0~2.4.
所述阻燃剂为尼龙阻燃剂,如:无卤磷氮系阻燃剂、次磷酸铝体系阻燃剂、无卤磷硅系阻燃剂。
所述连续纤维为玻璃纤维、碳纤维、芳纶纤维中的一种。
所述无机材料为氢氧化镁、氢氧化铝、水滑石、有机蒙脱土的一种或多种。
所述多功能综合助剂是综合抗氧化剂、润滑剂、分散剂、脱模助剂的一种或多种。如:抗氧剂1010、抗氧剂168、抗氧剂198、润滑剂EBS、流动分散剂HyPer C100、助剂EP6020。
本发明另一方面,涉及一种高阻燃性连续纤维增强尼龙6复合材料,其特征在于,所述高阻燃性连续纤维增强尼龙6复合材料基于上述任一方法制备。
与现有技术相比,本发明一种高阻燃性连续纤维增强尼龙6复合材料及制备方法具有以下突出的有益效果:
本发明连续增强热塑性材料因其质轻高强等众多优势代替了传统材料,具有很好的耐磨、耐腐蚀性,机械强度高、抗冲击性好,且破损后修复方便、快捷;由于材料质量轻,降低了整体箱体重量和产品成本,相较于传统材料来说,具有不易变形,施工简单、经久耐用,百分百可回收利用等特点。
附图说明
图1是本发明复合材料生产装置示意图;
图2是本发明复合材料生产流程图。
具体实施方式
下面将结合附图和实施例,对本发明作进一步详细说明。
实施例1
如图1、2所示,一种高阻燃性连续玻璃纤维增强尼龙6复合材料,所述复合材料的制备过程如下:
(1)将尼龙6树脂1和将尼龙6树脂2在100℃干燥4 h;
将45%尼龙6树脂1、11%尼龙6树脂2、23%阻燃剂、20%无机材料、1%助剂置于混料机中充分混合,混合温度为60℃,混合时间为40min,得到混合好的物料;
(2)将混合好的物料送入双螺杆挤出机中,挤出造粒、干燥;
(3)将相互平行的单向连续纤维经熔融浸渍工艺,与熔融的PA6阻燃料浸渍制成所述高阻燃性连续纤维增强尼龙6单向预浸带,经热压成型复合成板;
其中所述尼龙6树脂1、阻燃剂、尼龙6树脂2、无机材料、助剂混合物的重量百分含量为50%;
所述连续纤维的重量百分含量为50%。
实施例2
一种高阻燃性连续纤维增强尼龙6复合材料,所述复合材料的制备过程如下:
(1)将尼龙6树脂1和将尼龙6树脂2在80~100℃干燥2~4 h;
将20%尼龙6树脂1、40%阻燃剂、20%尼龙6树脂2、15%无机材料、5%多功能综合助剂置于混料机中充分混合,混合温度为60℃,混合时间为40min,得到混合好的物料;
(2)将混合好的物料送入双螺杆挤出机中,挤出造粒、干燥;
(3)将相互平行的单向连续纤维经熔融浸渍工艺,与熔融的造粒物料浸渍制成所述高阻燃性连续纤维增强尼龙6复合材料。
其中所述尼龙6树脂1、阻燃剂、尼龙6树脂2、无机材料、多功能综合助剂混合物的重量百分含量为50%;
所述连续纤维的重量百分含量为50%。
实施例3
一种高阻燃性连续纤维增强尼龙6复合材料,所述复合材料的制备过程如下:
(1)将尼龙6树脂1和将尼龙6树脂2在80℃干燥4 h;
将65%尼龙6树脂1、20%阻燃剂、5%尼龙6树脂2、10%无机材料置于混料机中充分混合,混合温度为100℃,混合时间为20min,得到混合好的物料;
(2)将混合好的物料送入双螺杆挤出机中,挤出造粒、干燥;
(3)将相互平行的单向连续纤维经熔融浸渍工艺,与熔融的备用物料浸渍制成所述高阻燃性连续纤维增强尼龙6复合材料;
其中所述尼龙6树脂1、阻燃剂、尼龙6树脂2、无机材料、多功能综合助剂混合物的重量百分含量为30%;
所述连续纤维的重量百分含量为70%。
实施例4
一种高阻燃性连续纤维增强尼龙6复合材料,所述复合材料的制备过程如下:
(1)将尼龙6树脂1和将尼龙6树脂2在90℃干燥3 h;
将40%尼龙6树脂1、30%阻燃剂、15%尼龙6树脂2、12%无机材料、2%多功能综合助剂置于混料机中充分混合,混合温度为80℃,混合时间为30min,得到混合好的物料;
(2)将混合好的物料送入双螺杆挤出机中,挤出造粒、干燥;
(3)将相互平行的单向连续纤维经熔融浸渍工艺,与熔融的备用物料浸渍制成所述高阻燃性连续纤维增强尼龙6复合材料;
其中所述尼龙6树脂1、阻燃剂、尼龙6树脂2、无机材料、多功能综合助剂混合物的重量百分含量为40%;
所述连续纤维的重量百分含量为60%。
主要性能测试:单向预浸带经热压成型制成实心板后,按照标准制成标准样块进行EN45545测试,测试结果如下:
参考标准:
EN45545-2 R1危险等级 HL1的数据要求:
CFE火焰延伸测试≥ 20;热释放量无要求;
Ds(4)烟密度≤600;VOF(4)烟密度≤1200;毒性测试≤1.2。
EN45545-2 R1危险等级 HL2的数据要求:
CFE火焰延伸测试≥ 20;热释放量≤ 90;
Ds(4)烟密度≤300;VOF(4)烟密度≤600毒性测试≤0.9。
EN45545-2 R1危险等级 HL3的数据要求:
CFE火焰延伸测试≥ 20;热释放量≤ 60;
Ds(4)烟密度≤150;VOF(4)烟密度≤300;毒性测试≤0.75
以上所述的实施例,只是本发明较优选的具体实施方式,本领域的技术人员在本发明技术方案范围内进行的通常变化和替换都应包含在本发明的保护范围内。
Claims (10)
1.一种高阻燃性连续纤维增强尼龙6复合材料制备方法,其特征在于,所述制备方法的实现包括:
将尼龙6树脂1、阻燃剂、尼龙6树脂2、无机材料、多功能综合助剂混合后造粒,通过熔融浸渍工艺与连续纤维浸渍制成所述高阻燃性连续纤维增强尼龙6复合材料;
所述尼龙6树脂1为高粘度树脂;
所述尼龙6树脂2为低粘度树脂。
2.根据权利要求1所述的一种高阻燃性连续纤维增强尼龙6复合材料制备方法,其特征在于,所述尼龙6树脂1、阻燃剂、尼龙6树脂2、无机材料、多功能综合助剂混合物中各成分的重量百分含量为尼龙6树脂1为20~65%,阻燃剂20~40%、尼龙6树脂2为5~20%、无机材料10~15%、多功能综合助剂0~5%。
3.根据权利要求1或2所述的一种高阻燃性连续纤维增强尼龙6复合材料制备方法,其特征在于,所述尼龙6树脂1、阻燃剂、尼龙6树脂2、无机材料、多功能综合助剂混合物的重量百分含量为30-50%;
所述连续纤维的重量百分含量为50-70%。
4.根据权利要求3所述的一种高阻燃性连续纤维增强尼龙6复合材料制备方法,其特征在于,所述方法的实现步骤如下:
(1)将尼龙6树脂1和将尼龙6树脂2在80~100℃干燥2~4 h;
将20~65%尼龙6树脂1、20~40%阻燃剂、5~20%尼龙6树脂2、10~15%无机材料、0~5%多功能综合助剂置于混料机中充分混合,混合温度为60~100℃,混合时间为20~40min,得到混合好的物料;
(2)将混合好的物料送入双螺杆挤出机中,挤出造粒、干燥;
(3)将相互平行的单向连续纤维经熔融浸渍工艺,与熔融的造粒物料浸渍制成所述高阻燃性连续纤维增强尼龙6复合材料。
5.根据权利要求4所述的一种高阻燃性连续纤维增强尼龙6复合材料制备方法,其特征在于,所述尼龙6树脂1粘度在2.4~2.8;
所述尼龙6树脂2粘度在2.0~2.4。
6.根据权利要求4所述的一种高阻燃性连续纤维增强尼龙6复合材料制备方法,其特征在于,所述阻燃剂为尼龙阻燃剂。
7.根据权利要求4所述的一种高阻燃性连续纤维增强尼龙6复合材料制备方法,其特征在于,所述连续纤维为玻璃纤维、碳纤维、芳纶纤维中的一种。
8.根据权利要求4所述的一种高阻燃性连续纤维增强尼龙6复合材料制备方法,其特征在于,所述无机材料为氢氧化镁、氢氧化铝、水滑石、有机蒙脱土的一种或多种。
9.根据权利要求4所述的一种高阻燃性连续纤维增强尼龙6复合材料制备方法,其特征在于,所述多功能综合助剂是综合抗氧化剂、润滑剂、分散剂、脱模助剂的一种或多种。
10.一种高阻燃性连续纤维增强尼龙6复合材料,其特征在于,所述高阻燃性连续纤维增强尼龙6复合材料基于权利要求1-9任一方法制备。
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