Preparation method of low-melting-point composite polyester fiber with porous structure

Abstract

The invention discloses a preparation method of a low-melting-point composite polyester fiber with a porous structure, a composite fiber is prepared from low-melting-point polyester and fiber-grade polyester through a skin-core composite spinning method, a skin layer in the composite fiber comprises the low-melting-point polyester and a pre-activator, and a core layer is the fiber-grade polyester; and activating the composite fibers to prepare the porous-structure low-melting-point composite polyester fibers, and forming the porous-structure low-melting-point composite polyester fibers through hot air. The composite fiber is activated by a certain water solution, and micropores with the diameter of 0.1-1.0 micron are formed on the surface of the activated composite fiber. The porous composite low-melting-point polyester fiber is excellent in mechanical property, the surface porous structure endows a high specific surface area, the fiber water absorption rate is remarkably improved, meanwhile, when the porous composite low-melting-point polyester fiber is used as a hot melting bonding material, the bonding strength between fibers is high, high resilience under the action of strong external force can be achieved, and the application requirement of high-grade three-dimensional structure non-woven fabric is met.

Description

technical field [0001] The invention belongs to the technical field of polyester, relates to the forming and application of polyester fibers, and in particular relates to a preparation method of a porous structure low-melting composite polyester fiber. Background technique [0002] With the improvement of living standards and the rapid expansion of the non-woven industry, the filling and cushioning materials have entered the stage of upgrading. The traditional polyurethane foam materials have disadvantages such as poor ventilation and heat dissipation, easy aging, and the production of highly toxic hydrogen cyanide gas when burned. The application in areas with high safety and comfort requirements is obviously limited. In recent years, the emergence of polyester three-dimensional non-woven materials (also known as standing cotton) has provided people with a better choice. Generally, polyester fibers and low-melting fibers are used as raw materials. The multi-void three-dime...

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at problems such as detachment of fiber-fiber bonds caused by extruding, stretching, bending and other forces of the three-dimensional non-woven fabric material prepared in the hot air forming process of the existing skin-core composite low-melting point fiber, and improves the function of the fiber. In order to realize the application of non-woven high-resilience textiles, a method for preparing composite polyester fibers with a porous structure and low melting point was designed to significantly improve the bonding strength between fibers.