Patent ID: 9702061
Date: 2017-07-11
CPC Classifications: D01F,D03D,D04B,D06P

Claim:
1. A method for manufacturing a pile fabric comprising an acrylic synthetic fiber at a napped portion of a pile fabric, wherein the acrylic synthetic fiber is a fiber obtained by spinning a spinning solution comprising a polymer A and a polymer B; the polymer A is 90 to 99 parts by weight and the polymer B is 1 to 10 parts by weight when the total weight of the polymer A and the polymer B in the spinning solution is 100 parts by weight; the polymer A is a polymer obtained by polymerizing a composition A that is a composition comprising 40 to 97 wt % of acrylonitrile, 0 to 5 wt % of sulfonic acid-containing monomer and 3 to 60 wt % of another copolymerizable monomer when the total weight of the composition A is 100 wt %; the polymer B is a polymer that is obtained by polymerizing a composition B and that is dissolved in a mixed solvent comprising water and at least one organic solvent selected from the group consisting of N,N-dimethylformamide, N,N-dimethylacetamide, dimethylsulfoxide and acetone; and the composition B is a composition comprising 0 to 70 wt % of acrylonitrile, 20 to 90 wt % of acrylic ester and 10 to 40 wt % of sulfonic acid-containing monomer when the total weight of the composition B is 100 wt %, the method comprising: dyeing at least partially the acrylic synthetic fiber before forming the napped portion of the pile fabric or after forming the napped portion of the pile fabric to make a dyed acrylic synthetic fiber; discharge-printing the pile fabric comprising the dyed acrylic synthetic fiber at the napped portion to make a discharge-printed acrylic synthetic fiber at the napped portion of the pile fabric; and separately from the discharge-printing, adding water to the dyed acrylic synthetic fiber or the discharge-printed acrylic synthetic fiber at the napped portion of the pile fabric in an amount of more than 43 parts by weight with respect to 100 parts by weight of the dyed acrylic synthetic fiber or the discharge-printed acrylic synthetic fiber at the napped portion of the pile fabric, and carrying out a wet-heat treatment at a temperature higher than 80° C., wherein, after the adding water step, the dyed acrylic synthetic fiber or the discharge-printed acrylic synthetic fiber at the napped portion of the pile fabric has an apparent specific gravity in a range of 0.8 to 1.1.