Method for removal of spinning solvent from spun fiber
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United States of America Patent
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Jul 27, 1993
Grant Date -
N/A
app pub date -
Dec 9, 1991
filing date -
Dec 9, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to a process of extracting a first spinning solvent such as mineral oil from a solution spun polymer fiber such as polyethylene through use of an extraction solvent such as dimethyl diethylene glycol and diethyl diethylene glycol in which the spinning solvent is soluble, which extracting solvent is soluble in a third extraction solvent such as water to a greater extent than the extraction solvent is soluble in the spinning solvent, such that the second extracting solvent can be extracted from a solution of said spinning solvent and said second extraction solvent by said third extracting solvent.
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