CN115584089A - 一种耐高温pvc电缆料及其制备方法 - Google Patents
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Abstract
本发明公布了一种耐高温PVC电缆料及其制备方法,能够充分发挥基体材料和阻燃剂之间的多元协同作用,提升产品的阻燃性能,使得阻燃剂与基体共混能显著改善基体的强度,整个阻燃复合体系不仅分解温度高,而且具有无卤、低毒、高效的特点,避免了以往由于阻燃剂添加量过高带来的材料本体性能恶化和加工困难的问题,且以环氧树脂粉末、固化剂、抗氧化剂、三氧化二锑来进一步提高电缆的耐热性,尤其是在协同剂和固化剂的作用下,促使环氧树脂粉末、固化剂和三氧化二锑从不同的阻燃机理产生协同效果,从而来进一步提高电缆耐热性能,进一步提高耐高温阻燃效果。
Description
技术领域
本发明涉及电缆料制备方法技术领域,具体为一种耐高温PVC电缆料及其制备方法。
背景技术
随着电线电缆行业的迅速发展,电线电缆的需求量逐渐增大,应用也越来越广泛,电线电缆的基料主要为PVC塑料,PVC塑料是五大通用合成塑料之一,是目前世界上仅次于聚乙烯的第二大塑料品种,PVC电缆料是以聚氯乙烯为基础树脂,添加稳定剂、增塑剂以及无机填充物、助剂和润滑剂等添加剂,经过混配捏合挤出而制备的粒子,这种PVC电缆材料存在耐高温性差,韧性低,影响电缆的使用寿命,使聚氯乙烯电缆的使用场合受到很大限制,且PVC电线电缆存在高温下易燃的安全隐患,现有的PVC电缆料依然存在不耐高温老化、老化后抗张强度低等缺陷,影响电缆的使用寿命,因此,我们提出一种耐高温PVC电缆料及其制备方法。
发明内容
本发明的目的在于提供一种耐高温PVC电缆料及其制备方法,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:一种耐高温PVC电缆料,电缆料的材料为:PVC树脂60-90份、偏苯三酸三辛酯10-20份、云母粉10-20份、气相白炭黑5-10份、抗氧化剂1-4份、环氧大豆油2-5份、钙锌稳定剂5-10份、环氧树脂粉末6-12份、三氧化二锑1-2份、防老剂2-3份、抗氧化剂2-6份、固化剂2-5份、增塑剂2-6份、润滑剂1-3份、滑石粉10-20份、填充油2-6份和协同剂5-10份;
防老剂由防老剂CPPD和防老剂AW组成,且防老剂CPPD和防老剂AW按照重量比3:1。
制备方法的具体步骤为:
(1)称取相应重量份数的PVC树脂、偏苯三酸三辛酯、云母粉和气相白炭黑,将其投入至高速混合机中,高速混合20min,获得混合物A;
(2)然后称取环氧大豆油和抗氧化剂,将其导入到高速混合机中搅拌混合均匀后,获得混合物B;
(3)称取钙锌稳定剂、环氧树脂粉末和三氧化二锑,合并后,加入至混合物B中,继续搅拌混合5-8min,获得混合物C;
(4)将混合物C导入到密炼机中,同时将抗氧化剂、固化剂、增塑剂和润滑剂加入进去,持续混炼反应2h即可得到电缆料初级混合物;
(5)向初混物内依次添加相应重量份数的防老剂和滑石粉,然后进行二次混炼,混炼均匀后即可得电缆料基体,然后将复合混料送入双螺杆挤出造粒机中挤出造粒,随后放料至冷却混合机中进行冷搅20min后,出料得到复合混料;
(6)然后将复合混料进行粉碎,再将复合混料置于高速混合机中混合20min,同时加入填充油和协同剂,控制转速为1000r/min,促使高速混合机持续搅拌混合1-1.5h,再经双螺杆挤出造粒机组挤出造粒,得耐高温电缆料。
优选的,填充油为高闪点的工业石蜡油,其闪点≥230度,40度运动粘度≥80cSt。
优选的,抗氧化剂为抗氧剂1010与抗氧剂1098质量比为2:1的混合物。
优选的,润滑剂为聚乙烯蜡,协同剂采用氧化锌。
优选的,双螺杆挤出机各区温度为120-180度,主机的转速为400-550rpm,喂料速度为30-60r。
与现有技术相比,本发明的有益效果是:
1.本发明以氧化锌为协同剂且以PVC树脂、偏苯三酸三辛酯、云母粉和气相白炭黑作为电缆料基体,能够充分发挥基体材料和阻燃剂之间的多元协同作用,提升产品的阻燃性能,使得阻燃剂与基体共混能显著改善基体的强度,整个阻燃复合体系不仅分解温度高,而且具有无卤、低毒、高效的特点,避免了以往由于阻燃剂添加量过高带来的材料本体性能恶化和加工困难的问题,且以环氧树脂粉末、固化剂、抗氧化剂、三氧化二锑来进一步提高电缆的耐热性,尤其是在协同剂和固化剂的作用下,促使环氧树脂粉末、固化剂和三氧化二锑从不同的阻燃机理产生协同效果,从而来进一步提高电缆耐热性能,进一步提高耐高温阻燃效果;
2.本发明在保证耐高温的前提下在原料中添加滑石粉能够作为电缆料间隙填充物,从而减少电缆料内部空隙率,通过填充油提高材料之间的偶联性,同时石墨炭黑可以提高电缆料强度膨胀倍率,添加抗老剂保证电缆料具有优异的抗老化性能,经过老化后的电缆料依然能够保持较高的耐高温强度,能够为电缆提供良好的保护,保证了电缆的使用寿命。
具体实施方式
下面将结合本发明实施例,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,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,都属于本发明保护的范围。
本发明提供一种技术方案:一种耐高温PVC电缆料,电缆料的材料为:PVC树脂60-90份、偏苯三酸三辛酯10-20份、云母粉10-20份、气相白炭黑5-10份、抗氧化剂1-4份、环氧大豆油2-5份、钙锌稳定剂5-10份、环氧树脂粉末6-12份、三氧化二锑1-2份、防老剂2-3份、抗氧化剂2-6份、固化剂2-5份、增塑剂2-6份、润滑剂1-3份、滑石粉10-20份、填充油2-6份和协同剂5-10份;
防老剂由防老剂CPPD和防老剂AW组成,且防老剂CPPD和防老剂AW按照重量比3:1;
制备方法的具体步骤为:
(1)称取相应重量份数的PVC树脂、偏苯三酸三辛酯、云母粉和气相白炭黑,将其投入至高速混合机中,高速混合20min,获得混合物A;
(2)然后称取环氧大豆油和抗氧化剂,将其导入到高速混合机中搅拌混合均匀后,获得混合物B;
(3)称取钙锌稳定剂、环氧树脂粉末和三氧化二锑,合并后,加入至混合物B中,继续搅拌混合5-8min,获得混合物C;
(4)将混合物C导入到密炼机中,同时将抗氧化剂、固化剂、增塑剂和润滑剂加入进去,持续混炼反应2h即可得到电缆料初级混合物;
(5)向初混物内依次添加相应重量份数的防老剂和滑石粉,然后进行二次混炼,混炼均匀后即可得电缆料基体,然后将复合混料送入双螺杆挤出造粒机中挤出造粒,随后放料至冷却混合机中进行冷搅20min后,出料得到复合混料;
(6)然后将复合混料进行粉碎,再将复合混料置于高速混合机中混合20min,同时加入填充油和协同剂,控制转速为1000r/min,促使高速混合机持续搅拌混合1-1.5h,再经双螺杆挤出造粒机组挤出造粒,得耐高温电缆料;
填充油为高闪点的工业石蜡油,其闪点≥230度,40度运动粘度≥80cSt;
抗氧化剂为抗氧剂1010与抗氧剂1098质量比为2:1的混合物;
润滑剂为聚乙烯蜡,协同剂采用氧化锌;
双螺杆挤出机各区温度为120-180度,主机的转速为400-550rpm,喂料速度为30-60r;
选取不同的重量份进行电缆料制备,在电缆料制备完成后,对电缆料进行性能测试。
实施例1
1.选取相对应的重量份数的原料:PVC树脂60份、偏苯三酸三辛酯10份、云母粉10份、气相白炭黑5份、抗氧化剂1份、环氧大豆油2份、钙锌稳定剂5份、环氧树脂粉末6份、三氧化二锑1份、防老剂2份、抗氧化剂2份、固化剂2份、增塑剂2份、润滑剂1份、滑石粉10份、填充油2份和协同剂5份;
2.按照制备工艺的标准进行电缆料制备,然后进行性能测试,技术指标参考下表:
测试结果:符合抗拉强度高、耐热性能好和抗开裂性的标准。
实施例2
1.选取相对应的重量份数的原料:PVC树脂70份、偏苯三酸三辛酯13份、云母粉13份、气相白炭黑6份、抗氧化剂2份、环氧大豆油3份、钙锌稳定剂6份、环氧树脂粉末7份、三氧化二锑1.3份、防老剂2.3份、抗氧化剂3份、固化剂3份、增塑剂3份、润滑剂1.5份、滑石粉13份、填充油3份和协同剂6份;
2.按照制备工艺的标准进行电缆料制备,然后进行性能测试,技术指标参考下表:
测试结果:符合抗拉强度高、耐热性能好和抗开裂性的标准。
实施例3
1.选取相对应的重量份数的原料:PVC树脂80份、偏苯三酸三辛酯16份、云母粉16份、气相白炭黑8份、抗氧化剂3份、环氧大豆油4份、钙锌稳定剂8份、环氧树脂粉末10份、三氧化二锑1.6份、防老剂2.7份、抗氧化剂5份、固化剂4份、增塑剂5份、润滑剂2份、滑石粉18份、填充油5份和协同剂8份;
2.按照制备工艺的标准进行电缆料制备,然后进行性能测试,技术指标参考下表:
测试结果:符合抗拉强度高、耐热性能好和抗开裂性的标准。
实施例4
1.选取相对应的重量份数的原料:PVC树脂90份、偏苯三酸三辛酯20份、云母粉20份、气相白炭黑10份、抗氧化剂4份、环氧大豆油5份、钙锌稳定剂10份、环氧树脂粉末12份、三氧化二锑2份、防老剂3份、抗氧化剂6份、固化剂5份、增塑剂6份、润滑剂3份、滑石粉20份、填充油6份和协同剂10份;
2.按照制备工艺的标准进行电缆料制备,然后进行性能测试,技术指标参考下表:
测试结果:符合抗拉强度高、耐热性能好和抗开裂性的标准。
对比例1
1.选取相对应的重量份数的原料(不含防老剂):PVC树脂80份、偏苯三酸三辛酯16份、云母粉16份、气相白炭黑8份、抗氧化剂3份、环氧大豆油4份、钙锌稳定剂8份、环氧树脂粉末10份、三氧化二锑1.6份、抗氧化剂5份、固化剂4份、增塑剂5份、润滑剂2份、滑石粉18份、填充油5份和协同剂8份;
2.按照制备工艺的标准进行电缆料制备,然后进行性能测试,技术指标参考下表:
测试结果:符合抗拉强度高的标准但是耐热性差。
对比例2
1.选取相对应的重量份数的原料(无固化剂和三氧化二锑):PVC树脂80份、偏苯三酸三辛酯16份、云母粉16份、气相白炭黑8份、抗氧化剂3份、环氧大豆油4份、钙锌稳定剂8份、环氧树脂粉末10份、抗氧化剂5份、增塑剂5份、润滑剂2份、滑石粉18份、填充油5份和协同剂8份;
2.按照制备工艺的标准进行电缆料制备,然后进行性能测试,技术指标参考下表:
测试结果:符合耐热性能好和抗开裂性的标准但是抗拉伸强度低。
综合以上的测试技术指标,以环氧树脂粉末、固化剂、抗氧化剂、三氧化二锑来进一步提高电缆的耐热性,尤其是在协同剂和固化剂的作用下,促使环氧树脂粉末、固化剂和三氧化二锑从不同的阻燃机理产生协同效果,从而来进一步提高电缆耐热性能,进一步提高耐高温阻燃效果,且添加抗老剂保证电缆料具有优异的抗老化性能,经过老化后的电缆料依然能够保持较高的耐高温强度,能够为电缆提供良好的保护,保证了电缆的使用寿命。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (6)
1.一种耐高温PVC电缆料,其特征在于:电缆料的材料为:PVC树脂60-90份、偏苯三酸三辛酯10-20份、云母粉10-20份、气相白炭黑5-10份、抗氧化剂1-4份、环氧大豆油2-5份、钙锌稳定剂5-10份、环氧树脂粉末6-12份、三氧化二锑1-2份、防老剂2-3份、抗氧化剂2-6份、固化剂2-5份、增塑剂2-6份、润滑剂1-3份、滑石粉10-20份、填充油2-6份和协同剂5-10份;
防老剂由防老剂CPPD和防老剂AW组成,且防老剂CPPD和防老剂AW按照重量比3:1。
2.根据权利要求1所述的一种耐高温PVC电缆料的制备方法,其特征在于:制备方法的具体步骤为:
(1)称取相应重量份数的PVC树脂、偏苯三酸三辛酯、云母粉和气相白炭黑,将其投入至高速混合机中,高速混合20min,获得混合物A;
(2)然后称取环氧大豆油和抗氧化剂,将其导入到高速混合机中搅拌混合均匀后,获得混合物B;
(3)称取钙锌稳定剂、环氧树脂粉末和三氧化二锑,合并后,加入至混合物B中,继续搅拌混合5-8min,获得混合物C;
(4)将混合物C导入到密炼机中,同时将抗氧化剂、固化剂、增塑剂和润滑剂加入进去,持续混炼反应2h即可得到电缆料初级混合物;
(5)向初混物内依次添加相应重量份数的防老剂和滑石粉,然后进行二次混炼,混炼均匀后即可得电缆料基体,然后将复合混料送入双螺杆挤出造粒机中挤出造粒,随后放料至冷却混合机中进行冷搅20min后,出料得到复合混料;
(6)然后将复合混料进行粉碎,再将复合混料置于高速混合机中混合20min,同时加入填充油和协同剂,控制转速为1000r/min,促使高速混合机持续搅拌混合1-1.5h,再经双螺杆挤出造粒机组挤出造粒,得耐高温电缆料。
3.根据权利要求2所述的一种耐高温PVC电缆料的制备方法,其特征在于:填充油为高闪点的工业石蜡油,其闪点≥230度,40度运动粘度≥80cSt。
4.根据权利要求2所述的一种耐高温PVC电缆料的制备方法,其特征在于:抗氧化剂为抗氧剂1010与抗氧剂1098质量比为2:1的混合物。
5.根据权利要求2所述的一种耐高温PVC电缆料的制备方法,其特征在于:润滑剂为聚乙烯蜡,协同剂采用氧化锌。
6.根据权利要求2所述的一种耐高温PVC电缆料的制备方法,其特征在于:双螺杆挤出机各区温度为120-180度,主机的转速为400-550rpm,喂料速度为30-60r。
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