发明授权
- 专利标题: Sealable, transparent polyolefinic multilayer film
- 专利标题(中): 可密封,透明聚烯烃多层膜
-
申请号: US801808申请日: 1985-11-26
-
公开(公告)号: US4720420A公开(公告)日: 1988-01-19
- 发明人: Gunther Crass , Lothar Bothe , Siegfried Janocha
- 申请人: Gunther Crass , Lothar Bothe , Siegfried Janocha
- 申请人地址: DEX Frankfurt am Main
- 专利权人: Hoechst Aktiengesellschaft
- 当前专利权人: Hoechst Aktiengesellschaft
- 当前专利权人地址: DEX Frankfurt am Main
- 优先权: DEX34441581 19841204
- 主分类号: B32B27/32
- IPC分类号: B32B27/32 ; C09D123/12 ; C09J123/14 ; B32B7/02 ; B32B27/08 ; C09J7/02
摘要:
A sealable, transparent polyolefinic multilayer film composed of a polypropylene base layer, a non-sealable surface layer, and a sealable surface layer, and process therefor. The sealable surface layer has a low minimum sealing temperature and is made from a copolymer of propylene and ethylene or butene-1 units and/or a terpolymer of ethylene, propylene and butene-1 units. The non-sealable layer is a combination of a propylene homopolymer, a slip agent, and an anti-blocking agent. The process includes coextruding the three layers, biaxially stretching the coextruded film, and subjecting the non-sealable layer to a corona-discharge treatment.
公开/授权文献
信息查询