Flat sheet process for production of polyolefin shrink film
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United States of America Patent
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-
Jun 15, 1982
Grant Date -
N/A
app pub date -
Jun 25, 1981
filing date -
Jun 25, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A balanced, biaxially oriented polyolefin shrink film is produced using a tenter process by heating the film, stretching the film 7 to 10 times in the transverse direction, cooling the film and then heating and stretching the film 1.5 to 4 times in the longitudinal direction such that the ratio of the transverse stretch to the longitudinal stretch is greater than 2.0.
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