Staple fiber for electret non-woven fabric, process for the production of the electret non-woven fabric, and article to which the electret non-woven fabric is applied
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United States of America Patent
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Issued Date -
Oct 10, 2002
app pub date -
Feb 5, 2002
filing date -
Feb 8, 2001
priority date (Note) -
Abandoned
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Abstract
A staple fiber for an electret non-woven fabric, which is a polyolefin heat-bonding fiber having 0.05 to 1.0% by weight of an oil adhering thereto, characterized in that the amount of the adhering oil decreases to 0.001 to 0.2% by weight, and that the decrease ratio of the amount of the adhering oil can be at least 60%, under heat treatment for forming the polyolefin heat-bonding fiber into a non-woven fabric and/or under heat treatment of a non-woven fabric formed of the polyolefin heat-bonding fiber.
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