Polyolefin filter tow and method of making it
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United States of America Patent
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Jun 25, 1991
Grant Date -
N/A
app pub date -
Aug 10, 1988
filing date -
Aug 10, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A polyolefin material having improved fibrillation properties, allowing one to achieve higher yield in cigarette filters made from the fibrillated material is provided. The material includes between about 70% and about 99% of at least one polypropylene homopolymer with a melt index of between about 1.2 to about 3.0 (measured according to ISO standard 1133 at 230.degree. C., 2.16 kgf) and a density of about 0.905 g/cc, and between about 1% and about 30% of at least one low density polyethylene homopolymer with a melt index of between about 0.9 and 3.0 (measured according to ISO standard 1133 at 190.degree. C., 2.16 kgf) and a density of about 0.921 g/cc.
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