FIELD: chemical technology. SUBSTANCE: solution of a mixture consisting of poly-para-phenyleneterephthalamide with 3-30% polyvinylpyrrolidone with molecular mass 10000-40000 in sulfuric acid is extruded through spinneret and air space into water bath at temperature 5 C. Extrudate is extended in the air space by 6.3 fold, washed with water and/or diluted aqueous alkali solution. EFFECT: improved method of fiber preparing. 4 cl, 1 tbl, 2 dwg
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|---|---|---|---|
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| FABRIC | 1989 |
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| MIXED YARN FOR FRICTIONAL USE | 1999 |
|
RU2216612C2 |
