CN110343319A - 一种低烟无卤线缆加工方法 - Google Patents
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Abstract
本发明涉及线缆加工方法,具体涉及一种低烟无卤线缆加工方法,按照重量份称取各原材料,将硅橡胶生胶、三元乙丙橡胶生胶加入密炼机中密炼,再将聚乙烯、乙烯‑乙酸乙烯酯共聚物加入混炼,混合均匀后得到混合胶料,对硅氧烷接枝改性丙烯酸树脂、改性咪唑环氧树脂、烯丙基醚改性不饱和聚酯树脂、线性酚醛树脂加热密炼,再加入混合胶料进行混炼,混合搅匀后得到初线缆料,向初线缆料依次加入润湿剂、陶土、活性炭、三聚氰胺、羟基锡酸锌、氢氧化铝,混炼均匀后再加入硫磺、光稳定剂,继续混炼得到线缆料;本发明提供的技术方案能够有效克服现有技术所存在的阻燃性较差、耐老化性较差、力学性能较差的缺陷。
Description
技术领域
本发明涉及线缆加工方法,具体涉及一种低烟无卤线缆加工方法。
背景技术
电线电缆由于具有信息传递和能源输送等功能,在国民经济中占有举足轻重的地位。随着人们对自身健康的关注和环保意识的增强,低烟无卤电线电缆料制备的产品越来越受到青睐,需求量也越来越大,尤其是无毒性的聚烯烃类低烟无卤电线电缆料最被广泛关注。随着技术的发展,不管是各种极端条件下的需求还是日常生活中的需要,低烟无卤电线电缆料的开发变得越来越重要。
低烟无卤的小线径电线电缆料对阻燃要求的挑战非常高,主要是由于小线径条件下,样品的厚度非常薄,厚度越薄意味着对阻燃的要求越高。同时,还必须在满足阻燃前提下的力学、硬度、环保、加工等方面的要求。所以开发低烟无卤小线径电线电缆料是目前工业界和学术界面临的巨大挑战。
发明内容
(一)解决的技术问题
针对现有技术所存在的上述缺点,本发明提供了一种低烟无卤线缆加工方法,能够有效克服现有技术所存在的阻燃性较差、耐老化性较差、力学性能较差的缺陷。
(二)技术方案
为实现以上目的,本发明通过以下技术方案予以实现:
一种低烟无卤线缆加工方法,包括以下步骤:
S1、按照以下重量份称取各原材料:硅氧烷接枝改性丙烯酸树脂22-28份、改性咪唑环氧树脂12-18份、烯丙基醚改性不饱和聚酯树脂18-22份、线性酚醛树脂12-18份;
聚乙烯100份,乙烯-乙酸乙烯酯共聚物30-40份,硅橡胶生胶6-10份、三元乙丙橡胶生胶14-20份、硫磺0.5-1.5份、光稳定剂0.3-0.7份,润湿剂5-15份;
陶土3-7份,活性炭6-12份,三聚氰胺1-5份,羟基锡酸锌0.5-1.5份,氢氧化铝0.5-1.5份;
S2、将S1中准备的硅橡胶生胶、三元乙丙橡胶生胶加入密炼机中密炼,再将S1中准备的聚乙烯、乙烯-乙酸乙烯酯共聚物加入混炼,混合均匀后得到混合胶料;
S3、对S1中准备的硅氧烷接枝改性丙烯酸树脂、改性咪唑环氧树脂、烯丙基醚改性不饱和聚酯树脂、线性酚醛树脂加热密炼,再加入S2中的混合胶料进行混炼,混合搅匀后得到初线缆料;
S4、向S3中的初线缆料依次加入S1中准备的润湿剂、陶土、活性炭、三聚氰胺、羟基锡酸锌、氢氧化铝,混炼均匀后再加入S1中准备的硫磺、光稳定剂,继续混炼得到线缆料;
S5、对S4中的线缆料进行电子束照射,利用螺杆挤出机将照射后的线缆料包裹在绞制好的电缆导体外,再转移至硫化床进行硫化,在外部覆盖保护层后即得到低烟无卤线缆。
优选地,S3中加入所述混合胶料前在密炼机中190-200℃、20-30转/分钟的条件下混炼1-2h,加入所述混合胶料后在密炼机中210-220℃、150-250转/分钟的条件下混炼0.5-1h。
优选地,所述润湿剂为聚乙烯蜡、硬脂酸的混合物,且聚乙烯蜡和硬脂酸的质量比为2-3:1。
优选地,所述三聚氰胺、羟基锡酸锌和氢氧化铝的质量比为1-3:1:0.5-1.5。
优选地,所述螺旋杆挤出机为三段控温结构,第一段的温度为120-140℃,第二段的温度为145-165℃,第三段的温度为170-200℃。
优选地,所述硫化包括第一次硫化和第二次硫化,第一次硫化的温度为170-180℃、硫化时间为1-1.5h,第二次硫化的温度为190-200℃、硫化时间为2-3h。
(三)有益效果
与现有技术相比,本发明所提供的一种低烟无卤线缆加工方法具有以下有益效果:
(1)、采用电子束照射后的聚乙烯具有击穿场强高、截止损耗小、绝缘电阻大的优点,再配合乙烯-乙酸乙烯酯共聚物、硅橡胶生胶和三元乙丙橡胶生胶的辅助作用可以显著改善聚乙烯的耐高温性能,不易发生老化开裂的现象;
(2)、硅氧烷接枝改性丙烯酸树脂、改性咪唑环氧树脂、烯丙基醚改性不饱和聚酯树脂、线性酚醛树脂的合理配比,使线缆在低温条件下不脆化,在高温条件下保证一定的拉伸强度,具有较好的力学性能和优越的耐老化性;
(3)、陶土、活性炭以及三聚氰胺、羟基锡酸锌、氢氧化铝配合使用,可以提高线缆料的阻燃特性,同时陶土可以降低线缆料中可燃物质与火源的接触面积,少量燃烧产生的烟雾可以被活性炭吸收,进而从三个方面控制烟雾量,减少对环境的污染。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面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作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。
一种低烟无卤线缆加工方法,包括以下步骤:
S1、按照以下重量份称取各原材料:硅氧烷接枝改性丙烯酸树脂22-28份、改性咪唑环氧树脂12-18份、烯丙基醚改性不饱和聚酯树脂18-22份、线性酚醛树脂12-18份;
聚乙烯100份,乙烯-乙酸乙烯酯共聚物30-40份,硅橡胶生胶6-10份、三元乙丙橡胶生胶14-20份、硫磺0.5-1.5份、光稳定剂0.3-0.7份,润湿剂5-15份;
陶土3-7份,活性炭6-12份,三聚氰胺1-5份,羟基锡酸锌0.5-1.5份,氢氧化铝0.5-1.5份;
S2、将S1中准备的硅橡胶生胶、三元乙丙橡胶生胶加入密炼机中密炼,再将S1中准备的聚乙烯、乙烯-乙酸乙烯酯共聚物加入混炼,混合均匀后得到混合胶料;
S3、对S1中准备的硅氧烷接枝改性丙烯酸树脂、改性咪唑环氧树脂、烯丙基醚改性不饱和聚酯树脂、线性酚醛树脂加热密炼,再加入S2中的混合胶料进行混炼,混合搅匀后得到初线缆料;
S4、向S3中的初线缆料依次加入S1中准备的润湿剂、陶土、活性炭、三聚氰胺、羟基锡酸锌、氢氧化铝,混炼均匀后再加入S1中准备的硫磺、光稳定剂,继续混炼得到线缆料;
S5、对S4中的线缆料进行电子束照射,利用螺杆挤出机将照射后的线缆料包裹在绞制好的电缆导体外,再转移至硫化床进行硫化,在外部覆盖保护层后即得到低烟无卤线缆。
S3中加入混合胶料前在密炼机中190-200℃、20-30转/分钟的条件下混炼1-2h,加入混合胶料后在密炼机中210-220℃、150-250转/分钟的条件下混炼0.5-1h。
润湿剂为聚乙烯蜡、硬脂酸的混合物,且聚乙烯蜡和硬脂酸的质量比为2-3:1。
三聚氰胺、羟基锡酸锌和氢氧化铝的质量比为1-3:1:0.5-1.5。
螺旋杆挤出机为三段控温结构,第一段的温度为120-140℃,第二段的温度为145-165℃,第三段的温度为170-200℃。
硫化包括第一次硫化和第二次硫化,第一次硫化的温度为170-180℃、硫化时间为1-1.5h,第二次硫化的温度为190-200℃、硫化时间为2-3h。
实施例1
一种低烟无卤线缆加工方法,包括以下步骤:
S1、按照以下重量份称取各原材料:硅氧烷接枝改性丙烯酸树脂25份、改性咪唑环氧树脂15份、烯丙基醚改性不饱和聚酯树脂20份、线性酚醛树脂15份;
聚乙烯100份,乙烯-乙酸乙烯酯共聚物35份,硅橡胶生胶8份、三元乙丙橡胶生胶17份、硫磺1份、光稳定剂0.5份,润湿剂10份;
陶土5份,活性炭9份,三聚氰胺3份,羟基锡酸锌1份,氢氧化铝1份;
S2、将S1中准备的硅橡胶生胶、三元乙丙橡胶生胶加入密炼机中密炼,再将S1中准备的聚乙烯、乙烯-乙酸乙烯酯共聚物加入混炼,混合均匀后得到混合胶料;
S3、对S1中准备的硅氧烷接枝改性丙烯酸树脂、改性咪唑环氧树脂、烯丙基醚改性不饱和聚酯树脂、线性酚醛树脂加入密炼机中在195℃、25转/分钟的条件下混炼1.5h,再加入S2中的混合胶料在215℃、200转/分钟的条件下混炼0.75h,混合搅匀后得到初线缆料;
S4、向S3中的初线缆料依次加入S1中准备的润湿剂、陶土、活性炭、三聚氰胺、羟基锡酸锌、氢氧化铝,混炼均匀后再加入S1中准备的硫磺、光稳定剂,继续混炼得到线缆料;
S5、对S4中的线缆料进行电子束照射,利用螺杆挤出机将照射后的线缆料包裹在绞制好的电缆导体外,螺旋杆挤出机为三段控温结构,第一段的温度为130℃,第二段的温度为155℃,第三段的温度为185℃,再转移至硫化床进行硫化,硫化包括第一次硫化和第二次硫化,第一次硫化的温度为175℃、硫化时间为1.25h,第二次硫化的温度为195℃、硫化时间为2.5h,在外部覆盖保护层后即得到低烟无卤线缆。
实施例2
一种低烟无卤线缆加工方法,包括以下步骤:
S1、按照以下重量份称取各原材料:硅氧烷接枝改性丙烯酸树脂22份、改性咪唑环氧树脂12份、烯丙基醚改性不饱和聚酯树脂18份、线性酚醛树脂12份;
聚乙烯100份,乙烯-乙酸乙烯酯共聚物30份,硅橡胶生胶6份、三元乙丙橡胶生胶14份、硫磺0.5份、光稳定剂0.3份,润湿剂5份;
陶土3份,活性炭6份,三聚氰胺1份,羟基锡酸锌0.5份,氢氧化铝0.5份;
S2、将S1中准备的硅橡胶生胶、三元乙丙橡胶生胶加入密炼机中密炼,再将S1中准备的聚乙烯、乙烯-乙酸乙烯酯共聚物加入混炼,混合均匀后得到混合胶料;
S3、对S1中准备的硅氧烷接枝改性丙烯酸树脂、改性咪唑环氧树脂、烯丙基醚改性不饱和聚酯树脂、线性酚醛树脂加入密炼机中在190℃、20转/分钟的条件下混炼1h,再加入S2中的混合胶料在210℃、150转/分钟的条件下混炼0.5h,混合搅匀后得到初线缆料;
S4、向S3中的初线缆料依次加入S1中准备的润湿剂、陶土、活性炭、三聚氰胺、羟基锡酸锌、氢氧化铝,混炼均匀后再加入S1中准备的硫磺、光稳定剂,继续混炼得到线缆料;
S5、对S4中的线缆料进行电子束照射,利用螺杆挤出机将照射后的线缆料包裹在绞制好的电缆导体外,螺旋杆挤出机为三段控温结构,第一段的温度为120℃,第二段的温度为145℃,第三段的温度为170℃,再转移至硫化床进行硫化,硫化包括第一次硫化和第二次硫化,第一次硫化的温度为170℃、硫化时间为1h,第二次硫化的温度为190℃、硫化时间为2h,在外部覆盖保护层后即得到低烟无卤线缆。
其中,三聚氰胺、羟基锡酸锌和氢氧化铝的质量比为2:1:1。
实施例3
一种低烟无卤线缆加工方法,包括以下步骤:
S1、按照以下重量份称取各原材料:硅氧烷接枝改性丙烯酸树脂28份、改性咪唑环氧树脂18份、烯丙基醚改性不饱和聚酯树脂22份、线性酚醛树脂18份;
聚乙烯100份,乙烯-乙酸乙烯酯共聚物40份,硅橡胶生胶10份、三元乙丙橡胶生胶20份、硫磺1.5份、光稳定剂0.7份,润湿剂15份;
陶土7份,活性炭12份,三聚氰胺5份,羟基锡酸锌1.5份,氢氧化铝1.5份;
S2、将S1中准备的硅橡胶生胶、三元乙丙橡胶生胶加入密炼机中密炼,再将S1中准备的聚乙烯、乙烯-乙酸乙烯酯共聚物加入混炼,混合均匀后得到混合胶料;
S3、对S1中准备的硅氧烷接枝改性丙烯酸树脂、改性咪唑环氧树脂、烯丙基醚改性不饱和聚酯树脂、线性酚醛树脂加入密炼机中在200℃、30转/分钟的条件下混炼2h,再加入S2中的混合胶料在220℃、250转/分钟的条件下混炼1h,混合搅匀后得到初线缆料;
S4、向S3中的初线缆料依次加入S1中准备的润湿剂、陶土、活性炭、三聚氰胺、羟基锡酸锌、氢氧化铝,混炼均匀后再加入S1中准备的硫磺、光稳定剂,继续混炼得到线缆料;
S5、对S4中的线缆料进行电子束照射,利用螺杆挤出机将照射后的线缆料包裹在绞制好的电缆导体外,螺旋杆挤出机为三段控温结构,第一段的温度为140℃,第二段的温度为165℃,第三段的温度为200℃,再转移至硫化床进行硫化,硫化包括第一次硫化和第二次硫化,第一次硫化的温度为180℃、硫化时间为1.5h,第二次硫化的温度为200℃、硫化时间为3h,在外部覆盖保护层后即得到低烟无卤线缆。
以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不会使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。
Claims (6)
1.一种低烟无卤线缆加工方法,其特征在于:包括以下步骤:
S1、按照以下重量份称取各原材料:硅氧烷接枝改性丙烯酸树脂22-28份、改性咪唑环氧树脂12-18份、烯丙基醚改性不饱和聚酯树脂18-22份、线性酚醛树脂12-18份;
聚乙烯100份,乙烯-乙酸乙烯酯共聚物30-40份,硅橡胶生胶6-10份、三元乙丙橡胶生胶14-20份、硫磺0.5-1.5份、光稳定剂0.3-0.7份,润湿剂5-15份;
陶土3-7份,活性炭6-12份,三聚氰胺1-5份,羟基锡酸锌0.5-1.5份,氢氧化铝0.5-1.5份;
S2、将S1中准备的硅橡胶生胶、三元乙丙橡胶生胶加入密炼机中密炼,再将S1中准备的聚乙烯、乙烯-乙酸乙烯酯共聚物加入混炼,混合均匀后得到混合胶料;
S3、对S1中准备的硅氧烷接枝改性丙烯酸树脂、改性咪唑环氧树脂、烯丙基醚改性不饱和聚酯树脂、线性酚醛树脂加热密炼,再加入S2中的混合胶料进行混炼,混合搅匀后得到初线缆料;
S4、向S3中的初线缆料依次加入S1中准备的润湿剂、陶土、活性炭、三聚氰胺、羟基锡酸锌、氢氧化铝,混炼均匀后再加入S1中准备的硫磺、光稳定剂,继续混炼得到线缆料;
S5、对S4中的线缆料进行电子束照射,利用螺杆挤出机将照射后的线缆料包裹在绞制好的电缆导体外,再转移至硫化床进行硫化,在外部覆盖保护层后即得到低烟无卤线缆。
2.根据权利要求1所述的低烟无卤线缆加工方法,其特征在于:S3中加入所述混合胶料前在密炼机中190-200℃、20-30转/分钟的条件下混炼1-2h,加入所述混合胶料后在密炼机中210-220℃、150-250转/分钟的条件下混炼0.5-1h。
3.根据权利要求1所述的低烟无卤线缆加工方法,其特征在于:所述润湿剂为聚乙烯蜡、硬脂酸的混合物,且聚乙烯蜡和硬脂酸的质量比为2-3:1。
4.根据权利要求1所述的低烟无卤线缆加工方法,其特征在于:所述三聚氰胺、羟基锡酸锌和氢氧化铝的质量比为1-3:1:0.5-1.5。
5.根据权利要求1所述的低烟无卤线缆加工方法,其特征在于:所述螺旋杆挤出机为三段控温结构,第一段的温度为120-140℃,第二段的温度为145-165℃,第三段的温度为170-200℃。
6.根据权利要求1所述的低烟无卤线缆加工方法,其特征在于:所述硫化包括第一次硫化和第二次硫化,第一次硫化的温度为170-180℃、硫化时间为1-1.5h,第二次硫化的温度为190-200℃、硫化时间为2-3h。
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