Method for preparing self-crimping fibers by taking recycled polyester as raw material

Abstract

The invention discloses a method for preparing self-crimping fibers taking recycled polyester as a raw material. The self-crimping fiber is of a spiral parallel structure, wherein the cross section of the self-crimping fiber is 8-shaped or calabash-shaped; and a high-elasticity hydrophobic component A and a low-elasticity hydrophilic component B in a composite mass ratio of (40:60)-(60:40) are subjected to vacuum drying, respectively melted, plasticized and conveyed, and then subjected to composite spinning, drafting and heat setting to obtain the self-crimping fibers taking the regenerated polyester as the raw material. Specifically, when the body surface humidity is increased, the thread pitch of the fibers is increased, and fabric pores are expanded for heat dissipation; and when the body surface humidity is reduced, the thread pitch of the fibers is decreased, and the fabric pores are shrunk for heat preservation; The fibers have good wearing comfort and intelligent regulation and control on heat dissipation and warm keeping, and has the advantages of environmental protection, high-valued utilization of waste polyester, reduction of energy consumption and sustainability.

Description

technical field

[0001] The invention relates to the field of textile materials, in particular to a method for preparing self-crimping fibers using regenerated polyester as a raw material. Background technique

[0002] Polyethylene terephthalate (PET) is mainly obtained by condensation polymerization of terephthalic acid and ethylene glycol (EG), both of which come from petroleum. PET is widely used in fiber, food packaging and other fields due to its excellent thermal properties, mechanical properties and stability. In recent years, with the improvement of living standards, people's demand for polyester materials is increasing. Due to its strong biological and chemical inertness, PET products bring great convenience to human beings, but the huge amount of waste is also It creates a heavy burden on resources and the environment. Therefore, in line with the sustainable development principle of "green, low-carbon, circular", the recycling and reuse of waste polyester should b...