发明授权
US5433983A Biaxially oriented sealable polypropylene film having improved barrier
properties
失效
具有改善的阻隔性能的双轴取向密封聚丙烯薄膜
- 专利标题: Biaxially oriented sealable polypropylene film having improved barrier properties
- 专利标题(中): 具有改善的阻隔性能的双轴取向密封聚丙烯薄膜
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申请号: US154029申请日: 1993-11-18
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公开(公告)号: US5433983A公开(公告)日: 1995-07-18
- 发明人: Detlef E. Schuhmann , Herbert Peiffer , Ursula Murschall , Gunter Schloegl
- 申请人: Detlef E. Schuhmann , Herbert Peiffer , Ursula Murschall , Gunter Schloegl
- 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: DEX4032272.7 19900721
- 主分类号: B32B27/32
- IPC分类号: B32B27/32 ; B29D22/00
摘要:
A sealable film is disclosed comprising (i) a base layer comprising polypropylene and a hydrocarbon resin and (ii) at least one top layer comprising (a) an ethylene/propylene copolymer having an ethylene content of not more than about 10% by weight, (b) a propylene/1-butene copolymer, (c) a propylene/ethylene/alpha-olefin terpolymer, or (d) a blend of two or more of (a), (b) and (c), wherein at least one of said base layer and said at least one top layer contains an anti-blocking agent or lubricant and wherein the top layer contains a hydrocarbon resin. The film possesses improved barrier properties with respect to permeability to water vapor and oxygen, and which at the same time exhibits favorable slip properties and low shrink values.
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