Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1991-12-09
1993-07-27
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
26421116, D01F 1304
Patent
active
052308545
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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Bose Anjana
Hacker Scott M.
Izod Thomas P.
Allied-Signal Inc.
Tentoni Leo B.
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