母排热缩套管、铜排保护管生产中辐照剂量怎么控制?

2025-04-06 22:15:55
推荐回答(1个)
回答(1):

母排热缩管、铜排热缩管,沃尔兴在交联辐射中为获得良好的热收缩和机械性能,对热缩材料比较适宜的剂量应该是100~150kGy之间。交联度是影响材料机械、扩张及收缩性能的关键因素。聚乙烯的拉伸强度在一定范围内随辐射剂量的增加而增加,断裂伸长率则逐渐减小。因此合适的剂量才能保证材料具有较高的机械和扩张性能。辐照剂量太高,材料内部产生的三维网状结构结点过于密集,分子活动严重受限,受热扩张时网络弹性形变小,扩张困难,极易断裂;辐照剂量太低,交联度小,材料高温强度差,残余形变过大,加热时材料难以回缩到扩张前的尺寸。此外,辐照剂量还影响热缩圆套的收缩效率(收缩效率=收缩率矿张率),后者在一定范围内随辐照剂量的增大而增大,此后随剂量升高而趋于一恒定值。

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