Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1984-01-20
1985-11-05
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
264184, 264203, 264204, 264205, 2642101, 2642108, D01F 600
Patent
active
045512965
ABSTRACT:
Solutions of ultrahigh molecular weight polymers such as polyethylene in a relatively non-volatile solvent are extruded through an aperture at constant concentration through the aperture and cooled to form a first gel of indefinite length. The first gels are extracted with a volatile solvent to form a second gel and the second gel is dried to form a low porosity xerogel. The first gel, second gel or xerogel, or a combination, are stretched. Among the products obtainable are polyethylene fibers of greater than 30 or even 40 g/denier tenacity and of modulus greater than 1000 or even 1600 or 2000 g/denier.
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Kavesh Sheldon
Prevorsek Dusan C.
Allied Corporation
Doernberg Alan M.
Fuchs Gerhard H,.
Hampilos Gus T.
Thurlow Jeffery
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