发明申请
- 专利标题: HIGH PERFORMANCE SEALABLE COEXTRUDED BIAXIALLY ORIENTED POLYPROPYLENE FILM
- 专利标题(中): 高性能密封双面双面聚丙烯薄膜
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申请号: US12757091申请日: 2010-04-09
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公开(公告)号: US20100260996A1公开(公告)日: 2010-10-14
- 发明人: Yong Chen , Hongyu Chen , Xiao B. Yun , Jing Li , Morgan M. Hughes , Rajen M. Patel
- 申请人: Yong Chen , Hongyu Chen , Xiao B. Yun , Jing Li , Morgan M. Hughes , Rajen M. Patel
- 申请人地址: US MI Midland
- 专利权人: Dow Global Technologies Inc.
- 当前专利权人: Dow Global Technologies Inc.
- 当前专利权人地址: US MI Midland
- 优先权: CNPCT/CN2009/071236 20090410
- 主分类号: B32B5/00
- IPC分类号: B32B5/00 ; B32B27/32 ; B32B27/08
摘要:
A multilayer biaxially oriented polypropylene film is disclosed which comprises at least three layers. The first layer is an outer layer comprising a first polymer which is a homopolymer polypropylene resin having a melting point of at least 155° C. The second layer is a core layer, having a melting point greater than 150° C. The core layer includes a blend comprising a second polymer which is a polypropylene homopolymer having a melting point of at least 155° C. and a third polymer having a melting point no greater than 145° C. The second polymer comprises from 20% to 80% by weight of the core layer while the third polymer comprises from 80% to 20% by weight of the core layer. The last required layer in the film is a sealant layer. The sealant layer comprises a fourth polymer having a melting point no greater than 145° C.