Heat shrinkable polypropylene laminate film
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United States of America Patent
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Apr 15, 1997
Grant Date -
N/A
app pub date -
May 29, 1996
filing date -
Sep 29, 1994
priority date (Note) -
Expired
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Abstract
The heat shrinkable polypropylene film having an isotactic polypropylene layer as surface layers and a layer mainly composed of a syndiotactic polypropylene as an intermediate layer, having a shrinkage of not less than 25% at 100.degree. C. in the machine and transverse directions and being stretched at least two times in the machine and transverse directions, respectively. The film has a good packaging machine applicability and excellent propagation tear resistance, low temperature shrinkability and heat resistance, and is suitably used as a shrink packaging material.
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