Method for preparing perforated film
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United States of America Patent
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-
Dec 18, 1990
Grant Date -
N/A
app pub date -
Aug 19, 1988
filing date -
Aug 20, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for preparing a perforated film, for use in the field of sanitary, food packaging and industrial materials, by thermally embossing an oriented polyolefin film with an embossing roll having a large number of protruding knobs and a pinch roll which presses the film against the knobs, and simultaneously taking up the resultant film at a rate not less than the processing speed of the embossing roll.
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