A kind of preparation method of thermoplastic inorganic powder

Abstract

The invention discloses a preparation method of thermoplastic inorganic powder. The preparation method comprises the following steps: pre-treating inorganic powder through electron beam irradiation so as to form electric breakdown in inorganic powder granules to cause microcosmic defects and cracks; activating hydroxyl points of the inorganic powder granules; firmly embedding, connecting and covering a hydroxyl group in an ethylene-vinyl alcohol copolymer and a hydroxyl group in the inorganic powder through extrusion, shearing, rubbing and dispersion of a screw-rod extruder, so as to form inorganic powder which is completely covered by the ethylene-vinyl alcohol copolymer, wherein the hydroxyl groups are firmly connected so that a covering layer does not drop off. When the thermoplastic inorganic powder is added into plastic to be heated and subjected to screw-rod shearing processing, the thermoplastic inorganic powder is completely and firmly covered by the ethylene-vinyl alcohol copolymer covering layer, and the dispersion of the inorganic powder granules and a resin phase depends on the connection of the ethylene-vinyl alcohol copolymer, so that the blocking property and incompatibility of a resin continuous phase do not exist; an application amount of the inorganic powder in the plastic can be greatly improved and a mechanical property is not reduced. The application of replacing the plastic with the inorganic powder is extremely promoted and the thermoplastic inorganic powder has active environmental protection meanings and great economic meanings.

Description

technical field [0001] The invention relates to thermal plasticization treatment of inorganic powder, in particular to a preparation method of thermoplastic inorganic powder. Background technique [0002] my country's current import volume of petroleum products has exceeded 100 million tons, and the price of synthetic resins with petroleum as the main raw material has also risen accordingly. It is undoubtedly a major contribution to the country to replace petroleum products with relatively abundant inorganic powder materials. Energy saving is more obvious. Compared with the energy consumption of synthetic resin products in the whole process of petroleum exploration and exploitation, transportation, cracking and synthesis, the production of various powders is much simpler. The investment and energy consumption of 1 ton of inorganic powder products Consumption is only about ten percent of synthetic resin. Therefore, the rational use of various inorganic powders to replace res...

AI Technical Summary

Problems solved by technology

[0007] In view of the above, the dispersion and compatibility of inorganic powder and polymer are improved by anchoring and double-layer coating on the surface of the powder. However, when it is used for high temperature and shear processing of plastics, due to the pretreatment Existence will still cause the surface treatment agent to fall off, and cannot fundamentally solve the problem of incompatibility between the resin and the filler phase interface

With the demand for the development of a large number of applications of inorganic powders in plastics, the addition of a large amount of fillers will lead to a decline in material performance. The existing technology can no longer meet this demand. It is very important to re-research and understand plastic fillers.