Method for preparing single polymer composite material by using two-component composite fiber

Abstract

The present invention relates to a method for preparing a single polymer composite material by using two-component composite fiber. The method comprises the following steps: (1) adopting a composite spinning technology to prepare two homogeneous polymers into two-component composite fiber, wherein the two homogeneous polymers comprise a matrix polymer and a reinforcement phase polymer, the arrangement of the two-component composite fiber is a parallel type arrangement or a core-sheath type arrangement, when the arrangement of the two-component composite fiber is the core-sheath type arrangement, the core material is the reinforcement phase polymer, and the surface material is the matrix polymer; (2) weaving the two-component composite fiber from the step (1) to form composite fiber fabric; (3) carrying out hot pressing for the composite fiber fabric from the step (2) at the temperature between the melting point of the reinforcement phase polymer and the melting point of the matrix polymer, such that the matrix polymer is molten, and compounded to form the single polymer composite material. Compared to the prior art, the method of the present invention has advantages of simple process, large-scale production, environmental protection and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of thermoplastic composite materials, and in particular relates to a preparation method for manufacturing single-polymer composite materials from bicomponent composite fibers. Background technique [0002] Due to their excellent mechanical properties such as high tensile strength, flexural strength / modulus, high and low temperature impact strength, etc., and relatively low density and many other advantages, thermoplastic composite materials have been greatly developed at home and abroad in recent years. [0003] The key to preparing thermoplastic composites lies in the interface bonding between fibers and resins. However, since the matrix of thermoplastic composites lacks reactive active functional groups, it is difficult to form a good chemical bond with fibers, so the interface problem has always restricted its development; Solving the impregnation of reinforcing fibers with thermoplastic re...

AI Technical Summary

Problems solved by technology

[0003] The key to preparing thermoplastic composites lies in the interface bonding between fibers and resins. However, since the matrix of thermoplastic composites lacks reactive active functional groups, it is difficult to form a good chemical bond with fibers, so the interface problem has always restricted its development; Solving the impregnation of reinforcing fibers with thermoplastic resins has become a key technology for preparing thermoplastic composite materials in various countries; in addition, the extensive use of composite materials has led to an increase in composite material waste, and the recycling and reuse of materials has become the current trend of material design

This method can produce continuous fiber-reinforced thermoplastic resin composite material prepreg tape with better impregnation effect, but since the raw material is a pre-manufactured mixed fiber yarn, it is necessary to melt-spin the thermoplastic resin first, and then combine it with other fibers. Therefore, to achieve the mixing at the monofilament level, the process equipment and preparation process are complicated, and the modern environmental protection requirements of material recovery and reuse are not considered.