公开(公告)号：US20050012235A1

公开(公告)日：2005-01-20

申请号：US10495473

申请日：2002-10-09

申请人： Sandra Schregenberger ,  James Lottes ,  Pradeep Shirodkar ,  Porter Shannon

发明人： Sandra Schregenberger ,  James Lottes ,  Pradeep Shirodkar ,  Porter Shannon

IPC分类号： B29B7/42 ,  B29C47/00 ,  B29C67/24 ,  C08F8/06 ,  C08L23/04 ,  C08L23/06 ,  C08L23/08 ,  B29C47/36

CPC分类号： C08L23/06 ,  B29B7/421 ,  B29C48/022 ,  B29C48/10 ,  B29C48/52 ,  B29C48/53 ,  B29C67/246 ,  B29C2791/005 ,  B29K2023/06 ,  B29K2023/0641 ,  C08F8/06 ,  C08F8/50 ,  C08F110/02 ,  C08F2810/10 ,  C08L23/04 ,  C08L23/0815 ,  C08L2205/02 ,  C08L2205/025 ,  C08L2666/06

摘要： A process is provided for extruding a bimodal polyethylene resin. The process includes providing a polyethylene homopolymer or copolymer resin having a bimodal molecular weight distribution; conveying the resin through an extruder having a feed zone in which the resin is not melted, a melt-mixing zone in which at least a portion of the resin is melted, and a melt zone in which the resin is in a molten state, each zone being partially filled with the resin; and contacting the molten resin in the melt zone with a gas mixture of 8 to 40% by volume O2. The resin can be further pelletized. The oxygen-tailored resin can be used to make polyethylene films having improved bubble stability.

摘要翻译： 提供了挤出双峰聚乙烯树脂的方法。 该方法包括提供具有双峰分子量分布的聚乙烯均聚物或共聚物树脂; 将树脂输送通过具有未熔融树脂的进料区域的挤出机，至少部分树脂熔融的熔融混合区域和树脂处于熔融状态的熔融区域 部分地填充有树脂; 并使熔融区中的熔融树脂与8至40体积％O 2的气体混合物接触。 树脂可进一步造粒。 氧气调整树脂可用于制备具有改善气泡稳定性的聚乙烯膜。