发明名称 |
Preparation of polyethylene films |
摘要 |
A process for preparing polyethylene thin films is disclosed. The process comprises extruding a blend that comprises a linear low density polyethylene (LLDPE) and a high molecular weight, high density polyethylene (HMW-HDPE) or high molecular weight, medium density polyethylene (HMW-MDPE). The blend has an LLDPE/HMW-HDPE or HMW-MDPE weight ratio at least 50/50. The blend is extruded through an annular die to form a molten material tube. The molten material tube is then pulled around a fixed internal orientation device (FIOD) to form the film. The FIOD makes it possible to prepare polyethylene thin films from LLDPE-rich LLDPE/HMW-HDPE or HMW-MDPE blends on a high stalk film line. The films have increased machine-direction (MD) tears.
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申请公布号 |
US2005003175(A1) |
申请公布日期 |
2005.01.06 |
申请号 |
US20030611828 |
申请日期 |
2003.07.01 |
申请人 |
NYGARD PAULA L.;JORDY DONNIE W.;KNIGHT TRAVIS W.;VEDDER DALE A. |
发明人 |
NYGARD PAULA L.;JORDY DONNIE W.;KNIGHT TRAVIS W.;VEDDER DALE A. |
分类号 |
B29C47/90;B29C55/28;B29C67/24;C08L23/06;C08L23/08;(IPC1-7):B29D7/01;B29C47/20;C08L23/04 |
主分类号 |
B29C47/90 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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