Modified polypropylene fiber and preparation method thereof

Abstract

The invention relates to a modified polypropylene fiber and a preparation method thereof. The invention is characterized in that the fiber has a skin-core structure, wherein the core layer is composed of pure polypropylene; and the skin layer is composed of 0.5-60 parts of functional material, 0-5 parts of compatilizer and the balance of polypropylene, totaling 100 parts. The viscosity-average molecular weight of the polypropylene is 0.18-0.3 million, and the degree of isotacticity is greater than 95%. The functional material is a functional polypropylene fiber master batch prepared by blending and granulating inorganic or organic functional micropowder, a compatilizer and polypropylene, wherein the functional micropowder is composed of one or more of nano silicon dioxide, nano titanium dioxide, nano silicon dioxide, an anti-mite agent and an N-substituted alkoxy hindered amine flame retardant. The polypropylene fiber can be subjected to skin-core conjugate spinning according to the skin-core formula, and can be further processed into a polypropylene fiber spunbonded nonwoven fabric or melt-blown nonwoven fabric by spunbonding or melt-blowing. The method has the advantages of simple production technique and small modification for equipment, and is easy for practical popularization and application.

Description

technical field

[0001] The invention relates to the technical field of functional fibers, in particular to a modified polypropylene fiber and a preparation method thereof. Background technique

[0002] Polypropylene fiber is a fiber made from propylene as raw material through polymerization and melt spinning. The traditional polypropylene fiber has poor hygroscopicity, so it is less used in the civilian field. In the industrial field, carpet is its main application method, and its function is relatively single. However, with the advancement of science and technology and the improvement of people's living standards, the traditional polypropylene carpet with a single function can no longer meet people's requirements for comfort and versatility. Therefore, how to modify the polypropylene fiber, and then process it into a multi-functional carpet with antibacterial, anti-mite, negative ion release, flame retardant, anti-ultraviolet, etc. is particularly necessary.

[0003] At p...