Long and short fiber composite strengthening thermoplastic plastic particle material and production method thereof

Abstract

The invention discloses a long and short fiber composite strengthening thermoplastic plastic particle material and a production method thereof. The particle materials are composed of thermoplastic plastic substrate, strengthening long fibers and strengthening short fibers, wherein the strengthening long fibers have the same lengths as those of the particle materials, are parallelly distributed in the direction of particle material axis, and the short strengthening fibers are randomly and astatically distributed in the particle materials. Two strengthening fibers exist in the particle materials at the same time, namely the strengthening long fibers with the same lengths as those of the particle materials and the strengthening short fibers, which are randomly distributed in the particle materials, with different lengths. Therefore the particle materials integrate the strong mechanical property of the long fiber particle material LFT and the good processing technology property of the short fiber particle material SFT together. Furthermore, the ratio of the long fiber to short fiber in the particle materials can be adjusted through the technology to produce products with different mechanical properties and processing technology properties.

Description

technical field [0001] The present invention mainly relates to the field of glass fiber composite materials. Background technique [0002] There are currently two types of FRTP material pellets, one is short fiber reinforced thermoplastic pellets (SFT) and the other is long fiber reinforced thermoplastic pellets (LFT). In SFT, the reinforcing fibers are of different lengths, generally less than 1mm, and are randomly distributed in the pellets. However, due to the relatively good processing technology of this kind of pellets, the quality of product processing is good, the mechanical properties of the product are uniform, and the relative strength of the weld line is relatively high, it is widely used in injection molding. However, due to the short length of the reinforcing fibers in the pellets, the length is further shortened after injection molding, and the length of some reinforcing fibers in the pellets is already less than the critical length, which cannot play a reinfo...

AI Technical Summary

Problems solved by technology

However, because the reinforcing fibers are distributed parallel to the axis of the pellets in bundles, the reinforcing fibers are not completely infiltrated by Rongrong plastic, the solid injection molding process is poor, and the strength of the welded line of the product has a large drop

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