CN107936446A - 一种提高阻燃绝缘电线防潮性的电线加工方法 - Google Patents
一种提高阻燃绝缘电线防潮性的电线加工方法 Download PDFInfo
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Abstract
本发明属于绝缘电线料技术领域,具体涉及一种提高阻燃绝缘电线防潮性的电线加工方法,包括准备原料、防潮阻燃材料的制备和电线材料制备。本发明相比现有技术具有以下优点:本发明中选择多聚磷酸铵、氢氧化镁按比例组合,使阻燃性能较好,然后与环氧聚丁二烯丙烯酸酯等原料反应,使其在与其他原料有效结合的前提下,提高材料的防水性,分解温度高,克服了现有普通阻燃剂补奶水的缺陷,所得电线材料具有较好的热稳定性和机械性能,抗老化效果好,延长制品的贮存期和使用寿命,加工方法简单,适用于工业化生产。
Description
技术领域
本发明属于绝缘电线料技术领域,具体涉及一种提高阻燃绝缘电线防潮性的电线加工方法。
背景技术
随着经济社会的高速发展,建筑设施和人口相对密集的城镇街道、厂矿企业、住宅小区的用户配电变压器(变电站)的电压等级普遍提高,远离城市中心的国家电网与用户配电变压器之间及用户配电网内部大量采用1kV 级及以下的电力电缆连接,从而使 1kV 级的电缆的需求急剧攀升,由于电力电缆需穿越建筑设施和人口相对密集的区域,而这些区域的电力电缆因受复杂自然因素的影响有可能发生电力事故,为了使电力事故不会酿成火灾,或在遭受火灾破坏的情况下不会使电力电缆酿成次生事故,要求电力电缆需具有可靠的防火功能,因此,阻燃电缆的使用日益广泛,现有低烟无卤阻燃电缆料大多采用氢氧化镁和氢氧化铝作为阻燃剂,因为该类阻燃剂燃烧时不产生有毒烟气,且价格低廉,但实际使用过程中发现,大量施用此类阻燃剂会导致电线在高温潮湿的条件下容易吸水、不防潮,在运行时可能会发生短路现象,存在中大的安全用电隐患,这就急需研制一种价格低廉、阻燃效果好,且能防潮的绝缘电线。
发明内容
本发明的目的是针对现有的问题,提供了一种提高阻燃绝缘电线防潮性的电线加工方法。
本发明是通过以下技术方案实现的:一种提高阻燃绝缘电线防潮性的电线加工方法,包括以下步骤:
(1)按重量准备原料:聚烯烃弹性体40-50份、L-乳酸低聚物18-26份、链烯烃类液体橡胶26-38份、防潮阻燃材料55-65份、抗氧化剂1-2份、交联剂0.1-0.5份、过氧化引发剂0.2-0.6份、补强剂0.1-0.3份;
所述防潮阻燃材料的制备方法为:按重量计,取环氧聚丁二烯丙烯酸酯12-18份溶解于N,N-2-甲基吡咯烷酮得到质量浓度为30-38%的溶液,然后在其中加入聚苯醚1-2份、二氨基二苯甲烷0.2-0.8份、多聚磷酸铵1-3份、氢氧化镁6-8份,在温度为140-180℃的惰性气体氛围下搅拌反应20-30分钟,然后再加入0.1-0.3份二氮杂二环、0.5-0.9份邻苯二甲腈、0.02-0.08份间苯二酚,在温度为320-360℃的惰性气体氛围下搅拌反应1-2小时,所得产物在温度为500-600℃下保温20-40分钟后,离心分离,用去离子水洗涤,干燥后即得;
(2)将各原料按配比混合后,在温度为160-180℃、600-800转/分钟的条件下混炼1-2小时,混炼均匀后冷却、切粒,然后将所得颗粒产物置于辐照剂量为116-150kGy的条件下,经电子加速辐照交联得到产品。
作为对上述方案的进一步改进,所述聚烯烃弹性体为烯烃嵌段共聚物、乙烯-丁烯共聚物、半结晶丙烯-乙烯共聚物中的一种。
作为对上述方案的进一步改进,所述抗氧化剂为抗氧化剂由链终止型抗氧剂和金属离子螯合剂以重量比16-20:1混合得到;所述交联剂为氮丙啶交联剂或硅烷交联剂中的一种;所述过氧化引发剂为过氧化二苯甲烷、过氧化苯甲酸叔丁酯、2,5-二甲基-2,5-叔丁基过氧化己烷中的一种;所述补强剂为粒径为20-200nm的二氧化硅;所述惰性气体为氩气或氮气;所述步骤(1)中烘干温度为65-75℃。
本发明相比现有技术具有以下优点:本发明中选择多聚磷酸铵、氢氧化镁按比例组合,使阻燃性能较好,然后与环氧聚丁二烯丙烯酸酯等原料反应,使其在与其他原料有效结合的前提下,提高材料的防水性,分解温度高,克服了现有普通阻燃剂补奶水的缺陷,所得电线材料具有较好的热稳定性和机械性能,抗老化效果好,延长制品的贮存期和使用寿命,加工方法简单,适用于工业化生产。
具体实施方式
实施例1
一种提高阻燃绝缘电线防潮性的电线加工方法,包括以下步骤:
(1)按重量准备原料:聚烯烃弹性体45份、L-乳酸低聚物22份、链烯烃类液体橡胶32份、防潮阻燃材料60份、抗氧化剂1.5份、交联剂0.3份、过氧化引发剂0.4份、补强剂0.2份;
所述防潮阻燃材料的制备方法为:按重量计,取环氧聚丁二烯丙烯酸酯15份溶解于N,N-2-甲基吡咯烷酮得到质量浓度为34%的溶液,然后在其中加入聚苯醚1.5份、二氨基二苯甲烷0.4份、多聚磷酸铵2份、氢氧化镁7份,在温度为160℃的惰性气体氛围下搅拌反应25分钟,然后再加入0.2份二氮杂二环、0.7份邻苯二甲腈、0.05份间苯二酚,在温度为340℃的惰性气体氛围下搅拌反应1.5小时,所得产物在温度为550℃下保温30分钟后,离心分离,用去离子水洗涤,干燥后即得;
(2)将各原料按配比混合后,在温度为170℃、700转/分钟的条件下混炼1.5小时,混炼均匀后冷却、切粒,然后将所得颗粒产物置于辐照剂量为134kGy的条件下,经电子加速辐照交联得到产品。
其中,所述聚烯烃弹性体为烯烃嵌段共聚物;所述抗氧化剂为抗氧化剂由链终止型抗氧剂和金属离子螯合剂以重量比18:1混合得到;所述交联剂为氮丙啶交联剂;所述过氧化引发剂为过氧化二苯甲烷;所述补强剂为粒径为20-200nm的二氧化硅;所述惰性气体为氩气;所述步骤(1)中烘干温度为70℃。
经检测拉伸强度为15.2MPa,断裂伸长率为380%,VW-1阻燃实验通过后,拉伸强度保持率达到112%,断裂伸长率保持度达到98%,20℃体积电阻率为3.9×1012Ω·m,浸水7天后20℃体积电阻率为3.2×1012Ω·m。
实施例2
一种提高阻燃绝缘电线防潮性的电线加工方法,包括以下步骤:
(1)按重量准备原料:聚烯烃弹性体40份、L-乳酸低聚物26份、链烯烃类液体橡胶26份、防潮阻燃材料65份、抗氧化剂1份、交联剂0.5份、过氧化引发剂0.2份、补强剂0.1份;
所述防潮阻燃材料的制备方法为:按重量计,取环氧聚丁二烯丙烯酸酯18份溶解于N,N-2-甲基吡咯烷酮得到质量浓度为30%的溶液,然后在其中加入聚苯醚2份、二氨基二苯甲烷0.2份、多聚磷酸铵1份、氢氧化镁8份,在温度为140℃的惰性气体氛围下搅拌反应30分钟,然后再加入0.1份二氮杂二环、0.5份邻苯二甲腈、0.08份间苯二酚,在温度为320℃的惰性气体氛围下搅拌反应2小时,所得产物在温度为600℃下保温40分钟后,离心分离,用去离子水洗涤,干燥后即得;
(2)将各原料按配比混合后,在温度为180℃、600转/分钟的条件下混炼1小时,混炼均匀后冷却、切粒,然后将所得颗粒产物置于辐照剂量为150kGy的条件下,经电子加速辐照交联得到产品。
其中,所述聚烯烃弹性体为乙烯-丁烯共聚物;所述抗氧化剂为抗氧化剂由链终止型抗氧剂和金属离子螯合剂以重量比20:1混合得到;所述交联剂为硅烷交联剂;所述过氧化引发剂为过氧化苯甲酸叔丁酯;所述补强剂为粒径为20-200nm的二氧化硅;所述惰性气体为氮气;所述步骤(1)中烘干温度为75℃。
经检测拉伸强度为15.4MPa,断裂伸长率为375%,VW-1阻燃实验通过后,拉伸强度保持率达到114%,断裂伸长率保持度达到97%,20℃体积电阻率为3.8×1012Ω·m,浸水7天后20℃体积电阻率为3.3×1012Ω·m。
实施例3
一种提高阻燃绝缘电线防潮性的电线加工方法,包括以下步骤:
(1)按重量准备原料:聚烯烃弹性体50份、L-乳酸低聚物18份、链烯烃类液体橡胶38份、防潮阻燃材料55份、抗氧化剂2份、交联剂0.1份、过氧化引发剂0.6份、补强剂0.3份;
所述防潮阻燃材料的制备方法为:按重量计,取环氧聚丁二烯丙烯酸酯12份溶解于N,N-2-甲基吡咯烷酮得到质量浓度为38%的溶液,然后在其中加入聚苯醚1份、二氨基二苯甲烷0.8份、多聚磷酸铵3份、氢氧化镁6份,在温度为180℃的惰性气体氛围下搅拌反应20分钟,然后再加入0.3份二氮杂二环、0.9份邻苯二甲腈、0.02份间苯二酚,在温度为360℃的惰性气体氛围下搅拌反应1小时,所得产物在温度为500℃下保温20分钟后,离心分离,用去离子水洗涤,干燥后即得;
(2)将各原料按配比混合后,在温度为160℃、800转/分钟的条件下混炼2小时,混炼均匀后冷却、切粒,然后将所得颗粒产物置于辐照剂量为116kGy的条件下,经电子加速辐照交联得到产品。
其中,所述聚烯烃弹性体为半结晶丙烯-乙烯共聚物;所述抗氧化剂为抗氧化剂由链终止型抗氧剂和金属离子螯合剂以重量比16:1混合得到;所述交联剂为氮丙啶交联剂;所述过氧化引发剂为2,5-二甲基-2,5-叔丁基过氧化己烷;所述补强剂为粒径为20-200nm的二氧化硅;所述惰性气体为氩气或氮气;所述步骤(1)中烘干温度为65℃。
经检测拉伸强度为15.5MPa,断裂伸长率为370%,VW-1阻燃实验通过后,拉伸强度保持率达到113%,断裂伸长率保持度达到97%,20℃体积电阻率为3.9×1012Ω·m,浸水7天后20℃体积电阻率为3.3×1012Ω·m。
设置对照组1,将实施例1中防潮阻燃材料的制备去掉,其余内容不变;经检测拉伸强度为14.9MPa,断裂伸长率为320%,VW-1阻燃实验通过后,拉伸强度保持率达到103%,断裂伸长率保持度达到92%,20℃体积电阻率为3.6×1012Ω·m,浸水7天后20℃体积电阻率为1.3×1012Ω·m。
Claims (5)
1.一种提高阻燃绝缘电线防潮性的电线加工方法,其特征在于,包括以下步骤:
(1)按重量准备原料:聚烯烃弹性体40-50份、L-乳酸低聚物18-26份、链烯烃类液体橡胶26-38份、防潮阻燃材料55-65份、抗氧化剂1-2份、交联剂0.1-0.5份、过氧化引发剂0.2-0.6份、补强剂0.1-0.3份;
所述防潮阻燃材料的制备方法为:按重量计,取环氧聚丁二烯丙烯酸酯12-18份溶解于N,N-2-甲基吡咯烷酮得到质量浓度为30-38%的溶液,然后在其中加入聚苯醚1-2份、二氨基二苯甲烷0.2-0.8份、多聚磷酸铵1-3份、氢氧化镁6-8份,在温度为140-180℃的惰性气体氛围下搅拌反应20-30分钟,然后再加入0.1-0.3份二氮杂二环、0.5-0.9份邻苯二甲腈、0.02-0.08份间苯二酚,在温度为320-360℃的惰性气体氛围下搅拌反应1-2小时,所得产物在温度为500-600℃下保温20-40分钟后,离心分离,用去离子水洗涤,干燥后即得;
(2)将各原料按配比混合后,在温度为160-180℃、600-800转/分钟的条件下混炼1-2小时,混炼均匀后冷却、切粒,然后将所得颗粒产物置于辐照剂量为116-150kGy的条件下,经电子加速辐照交联得到产品。
2.如权利要求1所述一种提高阻燃绝缘电线防潮性的电线加工方法,其特征在于,所述聚烯烃弹性体为烯烃嵌段共聚物、乙烯-丁烯共聚物、半结晶丙烯-乙烯共聚物中的一种。
3.如权利要求1所述一种提高阻燃绝缘电线防潮性的电线加工方法,其特征在于,所述抗氧化剂为抗氧化剂由链终止型抗氧剂和金属离子螯合剂以重量比16-20:1混合得到;所述交联剂为氮丙啶交联剂或硅烷交联剂中的一种;所述过氧化引发剂为过氧化二苯甲烷、过氧化苯甲酸叔丁酯、2,5-二甲基-2,5-叔丁基过氧化己烷中的一种;所述补强剂为粒径为20-200nm的二氧化硅。
4.如权利要求1所述一种提高阻燃绝缘电线防潮性的电线加工方法,其特征在于,所述惰性气体为氩气或氮气。
5.如权利要求1所述一种提高阻燃绝缘电线防潮性的电线加工方法,其特征在于,所述步骤(1)中烘干温度为65-75℃。
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