The invention relates to a method for producing high-performance regenerated
polyester colored special-shaped filaments on the basis of waste
polyester textile products. By the aid of the method, theproblems of
high energy consumption and secondary
pollution due to
impurity removing, cleaning,
drying and the like in existing waste
textile product recycling procedures can be solved. The method includes steps of 1), pretreating the waste regenerated
polyester textile products; 2), carrying out
vacuum drying; 3), carrying out screw melting
extrusion, micro-
depolymerization, conditioning
viscosity increasing, full-color-spectrum
color matching and toning,
spinning manifold treatment, circular air blowing cooling, bundling oiling and winding doffing on dried polyester textile products to obtain the high-performance regenerated polyester
colored special-shaped filaments. The method has the advantages that the problems of
high energy consumption and secondary
pollution due to
impurity removing, cleaning,
drying and the like in the waste textile
product recycling procedures can be solved by the aid of the method; the monofilament denier of fibers obtained by the aid of the method ranges from 1.0 dtex to 3.0 dtex; the
yarn evenness of the fibers is lower than or equal to 2.2%; the
breaking strength of the fibers is higher than or equal to 4.0 cN / dtex; the elongation at break ranges from 15% to 25%.