METHOD OF PRODUCING LONG-FIBRE NONWOVEN MATERIAL Russian patent published in 2015 - IPC D04H3/00 

FIELD: chemistry.

SUBSTANCE: disclosed method of producing long-fibre nonwoven material in which polyphenylene sulphide, which exhibits excellent spinnability, is used as a basic component, and which includes a simplified step, where heat treatment in order to ensure stability of dimensions with respect to heating, is not carried out after forming the nonwoven material. The method of obtaining long-fibre nonwoven material includes: a step (a) of obtaining a long fibre by melting a resin containing polyphenylene sulphide as a basic component and by drawing and stretching a thread, which is cooled and cured after being forced through a die hole, with a spinning rate of 3000 m/min or higher using an ejector, while heating said thread up to the outlet opening of the ejector; a step (b) of forming a long fibre into a nonwoven fibre linen by collecting the long fibre on a moving grid and a step (c) for thermal binding of the obtained nonwoven fibre linen.

EFFECT: high efficiency of the method.

4 cl, 1 tbl, 1 dwg