METHOD FOR MODIFYING POLYETHYLENE TEREPHTHALATE FILAMENT SURFACE Russian patent published in 2015 - IPC D01F11/14 C08J7/12 C08G63/91 

FIELD: chemistry.

SUBSTANCE: invention refers to modifying polyethylene terephthalate (PETP) filament with functional additives for increasing thermal, photo-, wear- and hydrolytic stability. A method for modifying the polyethylene terephthalate filament suture involves processing polyethylene terephthalate with a modifier when heated in the solvent medium. The polyethylene terephthalate filament is processed at 40°C in the n-hexane medium for 1 h, and the modifier is 1,1,5-trihydroperfluoropentanol-1.

EFFECT: invention enables prolonging the temperature range of maintenance of the PETP products by increasing a degree of cristallinity and preparing the material having the high mechanical strength, thermal and hydrolytic stability.

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