两步法硅烷交联聚乙烯及其制品加工

Silane Crosslinked PE by Two-step Process and Its Product Processing

介绍两步法硅烷交联聚乙烯粒料的制备和性能 ,研究了交联聚乙烯管材成型设备结构的选择 ,结果表明 ,和普通三段式、屏障混炼头或盘式混炼头螺杆相比 ,分离型螺杆是优先选用的设备 ;生产中应加强对A、B材料的防护和按规程进行处理 ;硅烷交联HDPE管的使用寿命可长达 5 0年 ;两步法在接枝率、交联度、管材成型速度和物料存放时间方面优于一步法。

s The preparation and property of silane crosslinked PE pellet are introduced in this paper.The choice of the structure of the machinery for crosslinked PE pipe was studied.The results showed compared with common three-zone,barrier mixing head and disk mixing head,separating screw should be adopted at first,giving attention to the protection of A and B compounds and operating according to regulation.The service life of silane crosslinked HDPE pipe could be as long as 50 years.The graft ratio,degree of crosslinking,processing rate of pipe and storage life of silane crosslinked PE product were better than those of the product by one-step process.