Multilayered stretched hollow material
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United States of America Patent
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Issued Date -
Oct 29, 2009
app pub date -
Sep 4, 2007
filing date -
Sep 5, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
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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