The invention discloses a dust-free pure black
processing method for
polyester-cotton blend / cotton knitted shell fabrics, and aims to improve
yarn structures, a
dyeing process and
dyeing technology and provides an overall solution to solve the problems that the fibers are damaged to a certain extent, and the down dust falls off and cannot be completely removed by general
dyeing devices, and the black fabric is especially serious, after down
erosion (bio-
enzyme treatment) of the
polyester-cotton blend / cotton knitted shell fabrics. The
processing method comprises the following steps: singeing ofgrey cloth, presetting, scouring, dyeing, washing and
drying, and finalizing of the finished product. Raw materials of vortex
spinning cotton yarns and the like are selected for yarns, and a mechanical singeing process is replaced by a bio-enzymatic
etching process; the formula of a black monoazo
disperse dye SFN, a stabilizer EL-SF and other assistant are used in dyeing
polyester fibers, and dyeing cotton uses a
super black M
reactive dye G 300%. After the dyeing and finishing process, the color fastness indexes are excellent, the dust is very clean, the white color is not stained, and the cloth surface is smooth and clear in lines.