Polyamide composite material as well as preparation method and application thereof

Abstract

The invention provides a polyamide composite material which comprises the following components in parts by weight: 80-100 parts of short-carbon-chain polyamide; and 0.1-6 parts of an amide oligomer. In the repeating units of the short-carbon-chain polyamide, the number of carbon atoms on a main chain is smaller than or equal to 6. According to the polyamide composite material as well as the preparation method and application thereof, a small amount of amide oligomer is added, so that the injection molding property of the polyamide composite material can be obviously improved, the problems of mucous membrane, top bulge and the like in the production link are improved, the production efficiency is improved, and other properties such as mechanical properties of the polyamide composite material will not be obviously reduced.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyamide composite material and its preparation method and application. Background technique [0002] Since the invention of nylon products in the last century, they have been widely used in electronics, automobiles and spinning industries. However, when it is used as an engineering plastic in injection molding products, it faces problems such as slow crystallization rate, long molding cycle, product ejection deformation, and mucous membrane molding, which seriously affects the production efficiency of nylon in the injection molding process. [0003] The existing technology mainly solves the defect of poor injection molding performance through the following three methods: 1) At present, ultrafine talc powder is usually used as the crystallization nucleating agent of nylon materials, but the efficiency of this inorganic filler as a nucleating agent is low, and more ne...

AI Technical Summary

Problems solved by technology

However, when it is used as an engineering plastic in injection molding products, it faces problems such as slow crystallization rate, long molding cycle, product ejection deformation, and mucous membrane molding, which seriously affects the production efficiency of nylon in the injection molding process.

[0003] The existing technology mainly solves the defect of poor injection molding performance through the following three methods: 1) At present, ultrafine talc powder is usually used as the crystallization nucleating agent of nylon materials, but the efficiency of this inorganic filler as a nucleating agent is low, and more needs to be added In order to achieve a relatively ideal rapid crystallization rate, and the addition of a large amount will cause greater damage to the mechanical properties, especially the notched impact properties, which often have a 50% attenuation

2) There are also some commercial products that use some stearate substances as nucleating agents for materials, but the nucleation efficiency is very low, which cannot meet the requirements of more demanding products

3) At present, there are some new nano-filler technologies that can speed up the crystallization rate of nylon, but the technology is still immature and the price is very expensive, which cannot meet the requirements of commercialization