The paper analyses the reason forming water treeing in PE and mechanism suppressing water treeing.The condition forming water treeing is water drop existing in the structure defect in PE.

• 分析了PE样品中形成水树的原因及抑制水树的机理,认为水树形成的条件是在结构缺陷处有水滴形成,而抑制的方法就是设法消除水滴的形成。