Preparation method of carrier-free talcum powder master batch

Abstract

The invention relates to a talcum powder, in particular to a preparation method of carrier-free talcum powder master batch. The preparation method of the carrier-free talcum powder master batch comprises the following steps of: preparation of additive: mixing diluent and binding agent according to a certain proportion, wherein the diluent accounts for 90-99 percent, and the binding agent accounts for 1-10 percent; treatment of the talcum powder: stirring and mixing the mixed additive and talcum powder, wherein the additive accounts for 15-35 percent, and the talcum powder accounts for 65-85%; molding of the talcum powder: putting the mixed talcum powder into an extruder for extruding at the normal temperature, controlling the pelleting pressure to be 1-2 MPa, the diameter of the extruded granule to be 1-5mm and the length-diameter ratio to be 1-4; and drying the extruded granules at 120-180 DEG C for 0.5-1h, and obtaining the product, wherein the percent is weight percent. The preparation method has the advantages of solving the environment problem caused by rising powder in the using process of the traditional talcum powder.

Description

Technical field [0001] The invention relates to a talc powder, in particular to a preparation method of a carrier-free talc powder master batch. Background technique [0002] Talc is a water-containing silicate mineral with a layered structure. It is commonly used as a flaky, scaly or dense block-like aggregate. Its structural unit layers are maintained by molecular bonds, and there are ionic bonds on the interlayer. Covalent bond. The two structural unit layers are interlayer domains, which do not contain water or cations. The unit layers are only connected by weak van derwaals, so it is easy to dissociate into thin wafers. The flaky structure of talc powder allows certain properties of the material to be greatly improved when talc powder is filled with plastics. First of all, talc powder can improve the stiffness of the filling material and its creep resistance at high temperatures. When talc particles are arranged in the direction of material flow during processing, accordi...

AI Technical Summary

Problems solved by technology

However, the processing technology is relatively complex

[0005] In terms of granulation, technologies such as extruded strand water cooling, hot-cut water-cooled or hot-cut air-cooled extrusion granulation and vacuum compression granulation are currently used. These granulation technologies require raw materials to be processed under vacuum compression or heating. , the production process is relatively complex