公开(公告)号：US20180148862A1

公开(公告)日：2018-05-31

申请号：US15577462

申请日：2015-06-18

Applicant: RHODIA POLIAMIDA E ESPECIALIDADES S.A.

Inventor： Renata REDONDO BONALDI ,  Gabriel GORESCU ,  Everton FERREIRA DOS SANTOS ,  Paulo CANDIDO OLIVEIRA

IPC: D01F6/90 ,  D06P3/24

CPC classification number: D01F6/90 ,  D06P3/241

Abstract: The present invention relates to a polyamide fiber with enhanced dyeing properties. The polyamide fiber is suitable for low-temperature dyeing and shorter dyeing cycle. The present invention also discloses a method for obtaining such a fiber. The polyamide fiber is obtained by blending at least a polyamide 5.X, X being an integer from 4 to 16 with an aliphatic polyamide during the melt-spinning extrusion of the polyamide fiber. The blended polyamide fiber and articles made therefrom can be dyed at a lower temperature than the usual boiling temperature, and the dyeing time is half of the time of a normal dyeing cycle. The dyed polyamide fiber and article also show enhanced fastness to washing and perspiration.