Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1986-03-12
1987-10-06
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
264 85, 264205, 2642108, 26421114, 2642893, 2642905, D01F 614
Patent
active
046981942
ABSTRACT:
An ultra-high-tenacity multifilament fiber of polyvinyl alcohol having a degree of polymerization of at least 1500, said filament having a tensile strength of at least 12 g/d and an initial modulus greater than 280 g/d, which is produced by a process for producing an ultra-high-tenacity polyvinyl alcohol fiber which comprises the steps of dissolving polyvinyl alcohol having a degree of polymerization of at least 1500 in a solvent, dry-spinning the resulting polymer solution through a spinneret into an environment of air or inert gas, introducing the dry-spun filaments into a coagulating bath, and drawing the coagulated filaments at a total effective draw ratio of at least 20 times.
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patent: 3852402 (1974-12-01), Tanaka et al.
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patent: 4599267 (1986-07-01), Kwon et al.
Suzuki Mitsuo
Tanaka Hiroyoshi
Ueda Fujio
Lorin Hubert C.
Silbaugh Jan H.
Toray Industries Inc.
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