METHOD OF PRODUCTION OF CHEMICAL THREADS Russian patent published in 2005 - IPC

FIELD: chemical industry; production of melange polyester threads.

SUBSTANCE: the invention is dealt with chemical industry, production of chemical threads in particular, with production of the melange polyester threads used in production of upholstery fabrics, cloths for a furniture industry, production of fire hoses. The method of production of the chemical thread provides for molding from a granulate melt of micromatted polyethylene terephthalate of uncolored and colored pre-oriented multifilament threads, a drawing up and joining of components of a filament of different colors by action on them with directed streams of compressed air, by the threads feeding as two streams in the form of the core -type and run-up type filaments into a processing chamber with a feed rate of a core thread less than feed rate of the run-up type thread in respect to the wind-up speed of a filament. The method provides, that before feeding into the processing chamber a stream with core threads is subjected to treatment with demineralized water under pressure of 2.5-3.5 atmospheres. After the joining of the streams of the filaments in the processing chamber the thread is finally drawn up by 1.5-2.5 %, then it is heated up at the temperature of 140°-200° С. The technical result is an increase of compactness and strength of a thread.

EFFECT: the invention ensures production of threads of increased compactness and strength.

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