Polyolefin barium sulfate transparent masterbatch and preparation method thereof

Abstract

The invention relates to a polyolefin barium sulfate transparent masterbatch and a preparation method thereof. The polyolefin barium sulfate transparent masterbatch is composed of the following components including, by weight percentage, 75-85% of precipitated barium sulfate powder, 2-15% of linear low-density polyethylene, 2-5% of ethylene-vinyl acetate copolymer, 1-2.5% of polyethylene wax, 2-3% of semi-refined paraffin wax, 0.5-1.5% of zinc stearate, 0.5-1% of stearic acid and 1-2% of coupling agent. The preparation method of the polyolefin barium sulfate transparent masterbatch comprises the following steps of a, adding the precipitated barium sulfate powder into a high-speed rotary feeder for high-speed mixing; b, adding the coupling agent for three times for coating; c, continuing to heat the mixture; d, feeding the mixture into a crusher for cooling and cracking, and performing plastifying, granulation, hot cutting and air cooling on the crushed mixture inside a twin-screw extruder to obtain masterbatch particles. The polyolefin barium sulfate transparent masterbatch can maintain mechanical properties, color and transparency of polyolefin products and meanwhile substantially reduce the raw material cost.

Description

technical field [0001] The invention relates to a polyolefin transparent masterbatch and a preparation method thereof, and belongs to the technical field of masterbatch manufacturing in which inorganic powders and polymer materials are combined. Background technique [0002] The plastic products industry usually reduces the cost of raw materials by adding fillers. Generally, fillers will affect the mechanical properties, color and light transmittance of the product. The patent with the publication number CN102020786A discloses a new material specially used for transparent plastics, and its components include modified ultrafine precipitated barium sulfate, transparent powder, dispersing lubricant, coupling agent and carrier resin. Although adding transparent powder can enhance the transparency of the masterbatch to a certain extent, in the process of mixing transparent powder and modified ultrafine precipitated barium sulfate powder, the requirements for adding transparent po...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a polyolefin fully transparent masterbatch and its preparation method. The polyolefin transparent masterbatch produced by this method solves the problems of the decline in mechanical properties and color change of plastic products after using the filled masterbatch, especially It is a problem that the light transmittance of the film product decreases, the haze increases, and the whitening phenomenon is serious.