Flash polypropylene fiber and preparation method thereof

Abstract

The invention provides a three-leaf flash polypropylene fiber. The flash polypropylene fiber is characterized in that: the section of the fiber is in a three-leaf shape; and a fiber forming process comprises the following steps of: adding sorbitol nucleating agent and flow aid dispersant into an isotactic polypropylene slice with melt index of 18 to 35 grams per 10 minutes in a ratio, performing high mixing and extraction melting, performing extrusion from three-leaf spinneret orifices at a low temperature, cooling and molding, stretching and sizing to obtain the polypropylene fiber with flash effect. The polypropylene fiber has obvious flash effect, large specific surface area, strong dirt absorption and soft handfeel, and the mechanical property of the polypropylene fiber is obviously improved; and industrialized production can be performed by using the conventional equipment and processes, and the polypropylene fiber has considerable economic and social benefits.

Description

Technical field:

[0001] The invention belongs to the field of differentiated fibers, and in particular relates to a preparation technology of flashing polypropylene fibers. Background technique:

[0002] Polypropylene fiber has excellent physical and mechanical properties, rich sources of raw materials, simple manufacturing process and low cost, so it has broad application prospects in clothing, decoration and industrial supplies. Ordinary polypropylene fibers have a circular cross-section, which feels stiff and waxy, so many researchers have devoted themselves to the research of special-shaped polypropylene fibers. The developed special-shaped fibers include star-shaped, triangular, polygonal, etc. These fibers are improving the waxy feeling. At the same time, you will get an improvement in the gloss effect. However, due to the crystallization ability of polypropylene, its kinetic crystallization ability is 6 times that of polyester (polyethylene terephthalate), so it is e...