CN113321864A - 紫外光辐照交联绝缘料及制备方法 - Google Patents

紫外光辐照交联绝缘料及制备方法 Download PDF

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CN113321864A
CN113321864A CN202110600894.8A CN202110600894A CN113321864A CN 113321864 A CN113321864 A CN 113321864A CN 202110600894 A CN202110600894 A CN 202110600894A CN 113321864 A CN113321864 A CN 113321864A
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刘超
杨培杰
白帆
孔维民
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Abstract

本发明涉及一种紫外光辐照交联绝缘料及其制备方法,由下列重量份的原料制成:线性低密度聚乙烯A80%‑97%、高压茂金属聚乙烯B0%‑15%、紫外光吸收剂1.0%‑2.0%、紫外光交联剂0.5%‑1.5%、抗氧剂A0.1%‑0.5%、抗氧剂B0.1%‑0.5%,光稳定剂0.1%‑0.5%。该紫外光辐照交联绝缘料及其制备方法选择合适比例的基料及光引发剂,配合抗氧成分,同时添加一些光稳定剂,可保证绝缘料达到在使用时挤出表面光滑速度快,烟雾小,辐照时交联程度及效率高,成缆后光照不黄化的效果。

Description

紫外光辐照交联绝缘料及制备方法
技术领域:
本发明涉及电缆材料技术领域,尤其涉及一种紫外光辐照交联绝缘料及制备方法。
背景技术:
紫外光辐照交联电线绝缘料是将“紫外光辐照”技术应用于高分子材料改性最新技术领域的新型产品。基本原理为以聚烯烃为主要原料掺入适量的光交联引发体系,在一定条件下用紫外光照射,通过光引发剂吸收特定波长的紫外光引发产生活泼的大分子自由基,经过大分子自由基和其他添加剂的快速交联反应,将单独的聚乙烯长链大分子,用化学键联接成三维网状的交联聚乙烯超分子结构。经过交联的聚烯烃材料具有优良耐高温性、抗溶剂性,优异的电气性能和明显增强的力学性能等。
市场上的紫外光辐照交联料生产工艺,采用将各种原料高混机混合后,加入双螺杆造粒的方式生产。该工艺存在缺点,即在高混过程中,原材料在高混机筒壁上会结块从而影响材料配比,导致光吸收剂及交联剂的加入量和比例不均匀,材料造成产品质量波动。市场上紫外光辐照交联料所使用的基料基本为国产线型低密度聚乙烯,挤出时会出现表面不光滑和速度慢的情况,所选用的紫外光吸收剂为小分子量光吸收剂BP,挤出时烟雾大。在成缆后,在可见光照射下会出现绝缘层发黄现象。
发明内容:
本发明提供了一种紫外光辐照交联绝缘料及制备方法,保证紫外光辐照交联绝缘料的各项性能,解决了挤出表面,烟雾和黄化问题。
本发明提供一种紫外光辐照交联绝缘料,由下列重量份的原料制成:
Figure RE-GDA0003130443840000011
Figure RE-GDA0003130443840000021
作为优选,所述线性低密度聚乙烯A为7042,35B。
作为优选,所述高压茂金属聚乙烯B为CB1001。
作为优选,所述紫外光吸收剂为OEBP,DPBP。
作为优选,所述紫外光交联剂为TAC,TAIC,TMPTMA。
作为优选,所述抗氧剂A为1010,1076,1024。
作为优选,所述抗氧剂B为DSTP,DLTP,DLDTP。
作为优选,所述光稳定剂为UV-531,UV-9,UV-0。
本发明还提供一种上述紫外光辐照交联绝缘料的制备方法,包括如下步骤:
将紫外光吸收剂与紫外光交联剂溶解后混合均匀,加入液体计量秤上方的溶解桶,并在生产过程中保持搅拌状态,溶解桶与液体计量秤保温;
提前将两种抗氧剂与光稳定剂混合搅拌均匀,加入小料秤;
开机后通过液体计量秤将各种原料加入双螺杆,通过调整双螺杆螺纹元件组合和设置合适的温度,保证各原材料得到充分混炼混合塑化,经双螺杆混炼挤出后再到单螺杆造粒,得到质量稳定的紫外光辐照交联绝缘料。
本发明的有益效果是:
成分上:选择添加易加工高压茂金属聚乙烯改善挤出表面、添加大分子量的光引发剂减少挥发、添加少量光稳定剂在成缆后吸收紫外线,可使绝缘料挤出时挤出表面光滑速度快,挤出时发烟少,成缆后光照不黄化;
制备工艺上:选择使用自动计量设备精确下料各种组分,产品成分均匀稳定。避免了以往高混方式导致材料成分不均匀,产品组分有偏差的情况;
最终达到效果:产品成分均一,质量稳定。产品挤出时光滑稳定速度快,材料散发烟雾少,绝缘料辐照成缆后光照不黄化。
附图说明:
图1为本发明的紫外光辐照交联绝缘料的制备方法的工艺流程图。
具体实施方式:
下面对本发明的较佳实施例进行详细阐述,以使本发明的优点和特征能更易被本领域人员理解,从而对本发明的保护范围做出更为清楚明确的界定。
实施例1:线性低密度聚乙烯7042 96.5%、紫外光吸收剂BP 2%、紫外光交联剂TAIC 1%、抗氧剂1010 0.3%、抗氧剂DLTP 0.2%。
实施例2:线性低密度聚乙烯7042 91.5%、高压茂金属聚乙烯CB1001 5%紫外光吸收剂OEBP 1.8%、紫外光交联剂TAC 1%、抗氧剂1010 0.3%、抗氧剂 DLTP 0.2%,光稳定剂UV-0 0.2%。
实施例3:线性低密度聚乙烯7042 86%、高压茂金属聚乙烯CB1001 10%紫外光吸收剂OEBP 2%、紫外光交联剂TAIC 1%、抗氧剂1076 0.3%、抗氧剂 DSTP 0.2%,光稳定剂UV-0 0.5%。
实施例4:线性低密度聚乙烯7042 81%、高压茂金属聚乙烯CB1001 15%紫外光吸收剂OEBP 2%、紫外光交联剂TMPTMA 1%、抗氧剂1010 0.3%、抗氧剂 DLTP 0.2%,光稳定剂UV-0 0.5%。
实施例5:线性低密度聚乙烯35B 85%、高压茂金属聚乙烯CB1001 11%、紫外光吸收剂DPBP 2%、紫外光交联剂TAC 1%、抗氧剂1076 0.3%、抗氧剂DSTP 0.2%,光稳定剂UV-0 0.5%。
上述各实施例的制备工艺如图1所示:
选择好互溶性良好的光引发剂和交联剂,选择合适的基体树脂,选择抗氧剂。提前将紫外光吸收剂与交联剂溶解后混合均匀,加入液体计量秤上方的溶解桶,并在生产过程中保持搅拌状态,溶解桶与液体计量秤一直保温,证其一直处于混合均匀状态。保提前将两种抗氧剂及光稳定剂混合搅拌均匀,加入小料秤。开机后通过计量秤将各种原料加入双螺杆,通过调整双螺杆螺纹元件组合和设置合适的温度,保证各原材料得到充分混炼混合塑化,经双螺杆混炼挤出后再到单螺杆造粒,得到质量稳定的紫外光辐照交联用绝缘料。双螺杆挤出各区工艺温度:一区:120-140℃,二区110-120℃,三区140-150℃,四区 150-160℃,五区150-160℃,六区125-135℃,七区120-130℃。单螺杆造粒各区工艺温度:一区110-120℃,二区120-130℃,三区130-140℃。
对实施例制备的紫外光辐照交联绝缘料挤出辐照验证,并进行测试测试数据如表1所示。
Figure RE-GDA0003130443840000041
表1
测试结果表明:
1、使用大分子量OEBP光吸收剂的引发效率和程度比小分量BP要高;
2、添加高压茂金属聚乙烯材料力学性能变好,并且不影响交联效果;
3、添加光稳定剂对交联度略有不利影响,但仍满足标准要求;
4、添加大分子量OEBP或DPBP、高压茂金属聚乙烯、光稳定剂后材料经紫外光辐照后性能完全标准要求。
挤出试验表明:
1、随着添加高压茂金属聚乙烯CB1001增多,挤出表面明显比之前更光滑,开机速度明显提高。
2、将辐照后电缆样品放置在室外一个月验证,未添加光稳定剂材料明显变黄,添加光稳定剂后未变黄。
3、添加大分子量光吸收剂挤出时几乎无烟雾。
最后应说明的是:以上实施例仅用以说明本发明而并非限制本发明所描述的技术方案;因此,尽管本说明书参照上述的各个实施例对本发明已进行了详细的说明,但是,本领域的普通技术人员应当理解,仍然可以对本发明进行修改或等同替换;而一切不脱离本发明的精神和范围的技术方案及其改进,其均应涵盖在本发明的权利要求范围中。

Claims (9)

1.一种紫外光辐照交联绝缘料,其特征在于,由下列重量份的原料制成:
Figure FDA0003092656910000011
2.根据权利要求1所述的紫外光辐照交联绝缘料,其特征在于,所述线性低密度聚乙烯A为7042,35B,1520。
3.根据权利要求1所述的紫外光辐照交联绝缘料,其特征在于,所述高压茂金属聚乙烯B为CB1001。
4.根据权利要求1所述的紫外光辐照交联绝缘料,其特征在于,所述紫外光吸收剂为OEBP,DPBP。
5.根据权利要求1所述的紫外光辐照交联绝缘料,其特征在于,所述紫外光交联剂为TAC,TAIC,TMPTMA。
6.根据权利要求1所述的紫外光辐照交联绝缘料,其特征在于,所述抗氧剂A为1010,1076,1024。
7.根据权利要求1所述的紫外光辐照交联绝缘料,其特征在于,所述抗氧剂B为DSTP,DLTP,DLDTP。
8.根据权利要求1所述的紫外光辐照交联绝缘料,其特征在于,所述光稳定剂为UV-531,UV-9,UV-0。
9.一种如权利要求1-8任一项所述的紫外光辐照交联绝缘料的制备方法,其特征在于,包括如下步骤:
将紫外光吸收剂与紫外光交联剂溶解后混合均匀,加入液体计量秤上方的溶解桶,并在生产过程中保持搅拌状态,溶解桶与液体计量秤保温;
提前将两种抗氧剂和光稳定剂混合搅拌均匀,加入小料秤;
开机后通过液体计量秤将各种原料加入双螺杆,通过调整双螺杆螺纹元件组合和设置合适的温度,保证各原材料得到充分混炼混合塑化,经双螺杆混炼挤出后再到单螺杆造粒,得到质量稳定的紫外光辐照交联绝缘料。
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