Polyvinyl alcohol monofilament yarns and process for producing t

Details Polyvinyl alcohol monofilament yarns and process for producing t Polyvinyl alcohol monofilament yarns and process for producing t

1991-08-22

1993-11-23

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264178F, 26421115, 26421116, 2642107, 2642108, 264205, D01F 614

Patent

active

052641732

ABSTRACT:
A process for producing a high strength and high initial modulus polyvinyl alcohol monofilament yarn. The monofilament yarn is polyvinyl alcohol having a polymerization degree of from 1500 to 7000, a tensile strength of not less than 10 g/d and an initial modulus of not less than 200 g/d, with a fineness of 100 denier or more. The monofilament yarn is made by dry-wet spinning a spinning dope prepared by dissolving polyvinyl alcohol having a polymerization degree of from 1500 to 7000 in a solvent and stretching the resulting unstretched filament, where a plurality of filaments immediately after being spun from a spinning nozzle having a plurality of orifices are closely adhered and united into a substantially single strand in an inert atmosphere and then introduced into a coagulating bath or a cooling bath.

REFERENCES:
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patent: 4603083 (1986-07-01), Tanaka et al.
patent: 4698194 (1987-10-01), Tanaka et al.
patent: 5093063 (1992-03-01), Watanabe et al.
patent: 5133916 (1992-07-01), Sano et al.

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