Superfine talcum powder-polypropylene filled master batch, preparation method and equipment thereof

Abstract

The invention discloses a talcum powder-polypropylene filled master batch. The talcum powder-polypropylene filled master batch comprises the following components in percentage by weight: 75-85% of talcum powders, 10-15% of polypropylene materials, 0.5-0.7% of antioxidants and 1-5% of processing agents. Production equipment of the talcum powder-polypropylene filled master batch comprises a high-speed mixer, a feeding machine, a double-screw extrusion machine, a caterpillar track conveying and cooling device and a hob granulator, wherein the high-speed mixer is arranged above the feeding machine, a material outlet of the feeding machine is connected with a material inlet of the double-screw extrusion machine, a material outlet of the double-screw extrusion machine is connected with a material inlet of the caterpillar track conveying and cooling device, and a material outlet of the caterpillar track conveying and cooling device is connected with a material inlet of the hob granulator. Compared with the technology that an internal mixer is used for producing the superfine talcum powder master batch, the production equipment provided by the invention has the following advantages: the proper raw material formula, the forcing of the feeding machine, the double-screw extrusion with a deep spiral groove and a caterpillar track conveying and cooling granulation mode are adopted, so that the low-stacking-density powder can be fed into the double-screw extrusion machine with high efficiency; as the talcum powder-polypropylene filled master batch contains high inorganic powder content and the adopted spiral groove is deep, the talcum powder-polypropylene filled master batch can be conveyed conveniently; the plasticized dispersing efficiency of the talcum powder-polypropylene filled master batch is high; and the talcum powder-polypropylene filled master batch is not easy to break when adopting a water-cooling brace to granulate; and the normal granulation can be ensured.

Description

technical field [0001] The invention relates to the technical field of preparation of superfine talcum powder polypropylene filler masterbatch, in particular to a superfine talc powder polypropylene filler masterbatch and a production method and equipment thereof. Background technique [0002] Talc powder is a cheap inorganic filler commonly used in the plastics industry. It can effectively improve the rigidity, modulus and dimensional stability of the material and greatly reduce the cost; therefore, talc powder is widely used in the plastic modification industry. use. However, due to the small bulk density of talc powder, especially ultra-fine talc powder, dust is easily generated during the production process of plastic modification, which pollutes the production workshop and seriously affects the health of production employees. In addition, due to the small bulk density of talcum powder, when the modified plastic is processed with a screw extruder to add talcum powder, i...

AI Technical Summary

Problems solved by technology

There are two defects in this kind of processing technology: 1) It takes a long time for mixing (or heating) to reach the mixing temperature above 100°C; 2) Because the temperature of the high-speed mixer is difficult to control, and there are The melting point of some materials is around 100°C; therefore, there is a danger of agglomeration of the materials, which has a serious impact on the normal discharge of the high-speed mixer

This method has the following defects: 1) The diluent is difficult to recycle, which is easy to cause environmental pollution and material waste, and because the proportion of the added diluent is as high as 15%~35%, the subsequent drying process is more difficult and increases the manufacturing cost; 2) The hardness of the particles obtained by this processing method is very low, and it is easy to cause secondary dust pollution in the subsequent transportation and use; 3) Use the extruder equipment to cut pellets, so that the cut products are of different lengths, and the entire particle The appearance is very ugly, which is difficult for customers to accept

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