Abstract: In order to improve the felting, easy pilling characteristics of cashmere fabric, we researched on the cashmere fibers to graft on the surface with methyl acrylate as monomer, potassium persulfate (KPS) as initiator, analyzed the influence factors of the graft rate, and tested the morphological structure and main performance of the grafted cashmere fiber. It shows that: with bath ratio 1:20, initiator KPS amount of 1%, monomer concentration 40%, reaction temperature 80 ℃, reaction pH value 2, we can succeed to get the different increasing weight rate of graft cashmere feasible by controlling the reaction time; the cashmere fiber that the grafted weight increasing rate is 10%, got certain modifications on the surface based on maintaining a full scale structure, and its mechanical properties increased slightly, friction properties improved a lot, felting performance can be improved to a certain extent.

Key words: cashmere, methacrylamide, graft, surface modification