Continuous modification method for grammite for plastic

Abstract

The invention discloses a method for continuous modification of wollastonite used for plastics and belongs to the technical field of wollastonite modification methods. The problem to be solved is to provide a method for continuous modification of wollastonite used for plastics, which can achieve continuous surface inorganic high-efficient coating for wollastonite powders provided with great rigidity, smooth cleavage plane after crushing, and sharp edges, so as to reduce the deterioration of wollastonite to the performances of plastic materials and reduce the abrasion of wollastonite to the plastic processing machinery and moulds. The adopted proposal is that the mixing method of slurry a and slurry b is as follows: firstly, the slurry a and the slurry b respectively pass through two material inlets on the upper part of a Y-shaped reactor; the slurry a and the slurry b slide downward under the effect of gravity and are reacted at a crossing in the center of the Y-shaped reactor, so as to complete the mixing of the slurry a and the slurry b. The method of the invention can be widely applied to a variety of preparation methods for continuous modification of wollastonite used for plastics.

Description

Continuous modification method of wollastonite for plastics technical field The invention discloses a continuous wollastonite modification method for plastics, belonging to the technical field of wollastonite modification methods. Background technique Natural wollastonite mineral powder has a needle-like fiber structure, which can improve some properties of plastic matrix materials. However, due to the strong tendency of cleavage and fracture along the cleavage plane during the pulverization process of wollastonite mineral crystals, the powder The surface has flat cleavage plane and sharp edges and corners. The flat cleavage surface makes the binding force between the mineral powder and the plastic matrix poor; the sharp edges and corners can easily form stress concentration points, which will cause the degradation of the performance of the plastic material and affect the better function of the mineral powder. In addition, the hardness of wollastonite is quite high, and w...

AI Technical Summary

Problems solved by technology

Natural wollastonite mineral powder has a needle-like fiber structure, which can improve some properties of plastic matrix materials, but due to the strong tendency of cleavage and fracture along the cleavage plane during the pulverization process of wollastonite mineral crystals, the powder The surface has a flat cleavage plane and sharp edges and corners

The flat cleavage surface makes the binding force between the mineral powder and the plastic matrix poor; the sharp edges and corners are easy to form stress concentration points, which will cause the degradation of the performance of the plastic material and affect the better function of the mineral powder.

In addition, the hardness of wollastonite is quite high, and when it is used as a reinforcing filler in the plastics industry, it will cause serious wear problems to processing machinery and molds

Conventional methods mostly use batch-type tank-type stirring reaction for inorganic surface coating to solve this problem. The modification efficiency is low, the operation is cumbersome, and the quality of the product is unstable, which is not conducive to large-scale industrial production.