METHOD FOR PREPARING POLYVINYLIDENEFLUORIDE THREAD WITH CARBINE COVER Russian patent published in 2006 - IPC D01F11/04 C08J7/12 A61F2/02 B01D39/08 

FIELD: polymers.

SUBSTANCE: invention relates to technology for preparing and modification of chemical fibers and threads, in particular, to polyvinylidene fluoride (PVDF) fibers and threads. Method for preparing thread with carbine cover involves preliminary impregnation of PVDF thread of diameter 0.07-0.90 mm with dimethylformamide or dimethylsulfoxide for 1-4 h and the following treatment with 15-17% potassium hydroxide solution in n-butanol or n-propanol medium at temperature 60-80°C. Optimal treatment time is 0.5-4 h. Invention provides simplifying technology in preparing PVDF thread with carbine cover of different diameter and possessing higher physical-mechanical indices, among them, unit strength based on simultaneous elimination of highly toxic and highly inflammable substances, using a single-component highly boiling solvent, decreasing the potassium hydroxide concentration and elimination the ultrasonic field using. Invention can be used chemical industry, in particular, in manufacturing filtering and fettling materials and in medicine as suture biocompatible surgery threads showing the enhanced resistance to thrombosis.

EFFECT: improved preparing method, enhanced and valuable properties of cover.

2 cl, 1 tbl, 41 ex