发明申请
- 专利标题: Multilayered stretched hollow material
- 专利标题(中): 多层拉伸中空材料
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申请号: US12310671申请日: 2007-09-04
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公开(公告)号: US20090269528A1公开(公告)日: 2009-10-29
- 发明人: Isao Wada , Hidekazu Mitsuhashi
- 申请人: Isao Wada , Hidekazu Mitsuhashi
- 专利权人: PRIME POLYMER CO., LTD
- 当前专利权人: PRIME POLYMER CO., LTD
- 优先权: JP2006-240382 20060905; JP2006-280710 20061013; JP2006-352984 20061227
- 国际申请: PCT/JP2007/067232 WO 20070904
- 主分类号: B32B27/08
- IPC分类号: B32B27/08
摘要:
The object of the present invention is to provide a multilayered stretched hollow material having excellent transparency and gas barrier properties. The multilayered stretched hollow material of the present invention is characterized in that it includes surface layers and an intermediate layer wherein the surface layers each contain a propylene polymer composition containing a propylene polymer (the weight thereof being A) and a modified propylene polymer grafted with an unsaturated carboxylic acid or a derivative thereof (the weight thereof being B) in a weight ratio of B/(A+B)≧0.15 and wherein the intermediate layer contains a modified ethylene/vinyl compound copolymer that has a melt flow rate (ASTM D 1238, 210° C., 2.16 kg load) of not less than 8 g/10 min and a crystallization temperature (Tc) of not less than 138° C. and further wherein the multilayered stretched hollow material satisfies C/(A+B+C)≧0.05 wherein C is the weight of the ethylene/vinyl compound copolymer.
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