CN105131387A - 一种阻燃耐刮擦的复合环保电缆料及其制备方法 - Google Patents
一种阻燃耐刮擦的复合环保电缆料及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种阻燃耐刮擦的复合环保电缆料,由下列重量份的原料制成:高密度聚乙烯90-92、十溴联苯醚15-17、三氧化二锑7-9、硅油2-3、茂金属聚乙烯2-3、纳米氢氧化镁2-3、环己烷4-5、γ-氨丙基三乙氧基硅烷0.2-0.3、偶氮二异丁腈0.02-0.03、芥酸酰胺0.8-1、硅酮粉2-3、抗氧剂10242-3、等规聚丙烯9-11、陶土13-15。本发明添加少量的芥酸酰胺、硅酮粉等成分,相互配合,可以得到更好的耐刮擦性能,降低了表面析出喷霜的风险;采用高密度聚乙烯与等规聚丙烯作为基料,保证了产品具有优良的机械性能、阻燃性能、加工性能,同时克服了电缆料耐刮擦性能差的缺点。
Description
技术领域
本发明涉及高分子材料技术领域,尤其涉及一种阻燃耐刮擦的复合环保电缆料及其制备方法。
背景技术
聚氯乙烯(PVC)是一种用途非常广泛的通用塑料,根据添加增塑剂的量不同,可以制成硬质、半硬质和软质制品,还可以与其他聚合物共混进行改性,做成种类繁多、性能各异的制品,用量非常大,是世界五大通用塑料之一。在全球范围内PVC树脂的需求量和聚乙烯、聚丙烯位列前三位,而在中国其消费量已经升至第一位。聚氯乙烯本身也是本质阻燃材料,其氧指数很高,阻燃效果很好,但纯的PVC是刚性链段,在90℃以上就开始分解,加工就必须加入增塑剂,增塑剂都是易燃物,所以软质PVC须加入阻燃剂才有阻燃效果。而且聚氯乙烯在燃烧时会产生氯化氢气体,具有很大的毒性和腐蚀性,且浓烟较多。随着环保要求的提高,DOP等邻苯类增塑剂已经被禁止,所以说就要进一步发挥聚乙烯电缆料的各项优点。
聚乙烯(PE)是目前产量最大的通用塑料之一,具有耐化学腐蚀性、质轻、电绝缘性、无毒、易加工、价格低廉等特点,广泛应用于电器、化工、包装、食品、交通、建筑等行业。然而PE的氧指数只有17.5%,属于易燃材料,因此需要对其进行阻燃改性处理以扩大其应用范围。还有为了提高聚乙烯电缆料的介电特性,如空间电荷集聚、体积电阻率和击穿强度等,目前高压直流电缆一般采用传统方法来改性聚乙烯绝缘料。其中共混技术是提高聚乙烯介电性能使用最多的一种方法,但是不同组分的共混会形成两相结构的微观界面,甚至出现向材料表面渗透和分离现象,影响共混物的其他介电性能,如共混可能会导致介电强度降低。因此,最好的方法是使用两种化学结构相似、相容性好的组分来进行共混,从而消除两种材料的微观界面的不良影响。
同时电缆在生产、运输及使用的过程中,不可避免的相互产生摩擦或者受到硬物的摩擦,而产生摩擦刮白等现象,对线材的外观产生很大的影响。因此,如何提高电线电缆的耐刮擦性能也是一个非常重要且亟待解决的问题。
发明内容
本发明目的就是为了弥补已有技术的缺陷,提供一种阻燃耐刮擦的复合环保电缆料及其制备方法。
本发明是通过以下技术方案实现的:
一种阻燃耐刮擦的复合环保电缆料,由下列重量份的原料制成:高密度聚乙烯90-92、十溴联苯醚15-17、三氧化二锑7-9、硅油2-3、茂金属聚乙烯2-3、纳米氢氧化镁2-3、环己烷4-5、γ-氨丙基三乙氧基硅烷0.2-0.3、偶氮二异丁腈0.02-0.03、芥酸酰胺0.8-1、硅酮粉2-3、抗氧剂10242-3、等规聚丙烯9-11、陶土13-15。
所述一种阻燃耐刮擦的复合环保电缆料,由以下具体步骤制成:
(1)将十溴联苯醚、三氧化二锑加入到高速混合机中,在80-90℃下混合15-20分钟,然后将一半量的高密度聚乙烯加入到高速混合机中,90-100℃下混合10-15分钟,最后将混合好的物料置于开炼机中,在145℃下塑炼8-10分钟出片,粉碎后放入烘箱中干燥5-6小时,即得到阻燃母料;
(2)将纳米氢氧化铝与茂金属聚乙烯分别放在80℃电热恒温干燥箱内热处理6小时待用;将干燥后的纳米氢氧化铝超声分散于环己烷中,形成悬浮液,然后加入γ-氨丙基三乙氧基硅烷,超声分散20分钟后将悬浮液倒入器皿中,放入烘箱中,在60℃的温度下烘干24小时,得到表面改性的纳米粉;干燥后的茂金属聚乙烯与表面改性的纳米粉放入混料机中,以140℃的温度混料30分钟,然后在双螺杆挤出机中挤出造粒,制成抗击穿改性母料;
(3)将陶土中加入芥酸酰胺、硅酮粉、抗氧剂1024,放入球磨机中,混合均匀后,加入硅油,加热至60℃球磨15分钟后,取出干燥得到粉末备用;将等规聚丙烯置于双螺杆挤出机中,以130℃的温度混炼4-5分钟,然后加入干燥的粉末,控温继续混炼5分钟,冷却后取出得到混合物料;
(4)将阻燃母料、抗击穿改性母料、混合物料、剩余的高密度聚乙烯以及其余剩余成分放入高速混合机中,在温度为160℃,500转/分的速度下混合15分钟,再以2000转/分的速度混合10分钟下料,然后放入双螺杆挤出机挤出造粒,最后将粒料在80℃烘箱中干燥24小时即得。
本发明的优点是:本发明通过配方与工艺的改性,添加纳米氢氧化铝与茂金属聚乙烯等成分,这些成分的引入显著地减少了空间电荷的注入和聚集,改善了空间电荷特性,提高了直流击穿电场强度,同时由于含有少量的茂金属聚乙烯,提高了电缆料的拉伸强度以及综合性能。添加十溴联苯醚与三氧化二锑,协同作用,减少了可燃气体的生成量,改变了聚合物的分解模式,使材料的热稳定性得到了提高。同时反应分解出SbBr3,能较长时间停留在燃烧区域,具有稀释和隔离作用,进一步提高阻燃性能。
本发明添加少量的芥酸酰胺、硅酮粉等成分,相互配合,可以得到更好的耐刮擦性能,既降低了成本,又降低了表面析出喷霜的风险;采用高密度聚乙烯与等规聚丙烯作为基料,保证了产品具有优良的机械性能、阻燃性能、加工性能,同时克服了普通阻燃电缆料耐刮擦性能差的缺点。
具体实施方式
一种阻燃耐刮擦的复合环保电缆料,由下列重量份(公斤)的原料制成:高密度聚乙烯90、十溴联苯醚15、三氧化二锑7、硅油2、茂金属聚乙烯2、纳米氢氧化镁2、环己烷4、γ氨丙基三乙氧基硅烷0.2、偶氮二异丁腈0.02、芥酸酰胺0.8、硅酮粉2、抗氧剂10242、等规聚丙烯9、陶土13。
所述一种阻燃耐刮擦的复合环保电缆料,由以下具体步骤制成:
(1)将十溴联苯醚、三氧化二锑加入到高速混合机中,在80℃下混合15分钟,然后将一半量的高密度聚乙烯加入到高速混合机中,90℃下混合10分钟,最后将混合好的物料置于开炼机中,在145℃下塑炼8分钟出片,粉碎后放入烘箱中干燥5小时,即得到阻燃母料;
(2)将纳米氢氧化铝与茂金属聚乙烯分别放在80℃电热恒温干燥箱内热处理6小时待用;将干燥后的纳米氢氧化铝超声分散于环己烷中,形成悬浮液,然后加入γ氨丙基三乙氧基硅烷,超声分散20分钟后将悬浮液倒入器皿中,放入烘箱中,在60℃的温度下烘干24小时,得到表面改性的纳米粉;干燥后的茂金属聚乙烯与表面改性的纳米粉放入混料机中,以140℃的温度混料30分钟,然后在双螺杆挤出机中挤出造粒,制成抗击穿改性母料;
(3)将陶土中加入芥酸酰胺、硅酮粉、抗氧剂1024,放入球磨机中,混合均匀后,加入硅油,加热至60℃球磨15分钟后,取出干燥得到粉末备用;将等规聚丙烯置于双螺杆挤出机中,以130℃的温度混炼4分钟,然后加入干燥的粉末,控温继续混炼5分钟,冷却后取出得到混合物料;
(4)将阻燃母料、抗击穿改性母料、混合物料、剩余的高密度聚乙烯以及其余剩余成分放入高速混合机中,在温度为160℃,500转/分的速度下混合15分钟,再以2000转/分的速度混合10分钟下料,然后放入双螺杆挤出机挤出造粒,最后将粒料在80℃烘箱中干燥24小时即得。
将本发明电缆料应用于电缆的生产,电缆产品经检测,达到的指标如下:抗张强度≥16MPa,断裂伸张率≥280%,断裂伸长率变化率为15.8%,氧指数≥28%,介电强度≥30MV/m。
Claims (2)
1.一种阻燃耐刮擦的复合环保电缆料,其特征在于,由下列重量份的原料制成:高密度聚乙烯90-92、十溴联苯醚15-17、三氧化二锑7-9、硅油2-3、茂金属聚乙烯2-3、纳米氢氧化镁2-3、环己烷4-5、γ-氨丙基三乙氧基硅烷0.2-0.3、偶氮二异丁腈0.02-0.03、芥酸酰胺0.8-1、硅酮粉2-3、抗氧剂10242-3、等规聚丙烯9-11、陶土13-15。
2.根据权利要求1所述一种阻燃耐刮擦的复合环保电缆料,其特征在于,由以下具体步骤制成:
(1)将十溴联苯醚、三氧化二锑加入到高速混合机中,在80-90℃下混合15-20分钟,然后将一半量的高密度聚乙烯加入到高速混合机中,90-100℃下混合10-15分钟,最后将混合好的物料置于开炼机中,在145℃下塑炼8-10分钟出片,粉碎后放入烘箱中干燥5-6小时,即得到阻燃母料;
(2)将纳米氢氧化铝与茂金属聚乙烯分别放在80℃电热恒温干燥箱内热处理6小时待用;将干燥后的纳米氢氧化铝超声分散于环己烷中,形成悬浮液,然后加入γ-氨丙基三乙氧基硅烷,超声分散20分钟后将悬浮液倒入器皿中,放入烘箱中,在60℃的温度下烘干24小时,得到表面改性的纳米粉;干燥后的茂金属聚乙烯与表面改性的纳米粉放入混料机中,以140℃的温度混料30分钟,然后在双螺杆挤出机中挤出造粒,制成抗击穿改性母料;
(3)将陶土中加入芥酸酰胺、硅酮粉、抗氧剂1024,放入球磨机中,混合均匀后,加入硅油,加热至60℃球磨15分钟后,取出干燥得到粉末备用;将等规聚丙烯置于双螺杆挤出机中,以130℃的温度混炼4-5分钟,然后加入干燥的粉末,控温继续混炼5分钟,冷却后取出得到混合物料;
(4)将阻燃母料、抗击穿改性母料、混合物料、剩余的高密度聚乙烯以及其余剩余成分放入高速混合机中,在温度为160℃,500转/分的速度下混合15分钟,再以2000转/分的速度混合10分钟下料,然后放入双螺杆挤出机挤出造粒,最后将粒料在80℃烘箱中干燥24小时即得。
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