Polyethylene (PE) plastic black master batch and production method thereof

Abstract

The invention relates to polyethylene (PE) plastic and specially, relates to a PE plastic black master batch and a preparation method thereof. The PE plastic black master batch comprises 40 to 48% of linear low-density polyethylene, 4 to 9% of one or more dispersing agents, 0.5 to 2% of one or more lubricants, 0.5 to 2% of a coupling agent, and 40 to 55% of carbon black. The preparation method comprises the following steps of 1, diluting the coupling agent by the one or more lubricants, 2, carrying out surface treatment on carbon black through orderly adding the carbon black, the diluted coupling agent and the one or more dispersing agents into a high-speed mixer, carrying out low-speed mixing and high-speed mixing by the high-speed mixer, carrying out material discharge and cooling, 3, orderly adding linear low-density polyethylene powder and the carbon black treated by the step 2 into the high-speed mixer, stirring for 2 to 7 minutes, and carrying out material discharge, and 4, carrying out granulation by a low-shear strength combined double-screw extrusion granulator. The PE plastic black master batch has good carbon black dispersibility. A plastic product prepared from the PE plastic black master batch has a black color, a good gloss, a smooth surface, no color difference and a low cost.

Description

technical field [0001] The invention relates to PE plastics, in particular to a black masterbatch of PE plastics and a production method thereof. Background technique [0002] At present, the production of black masterbatch in the world is basically monopolized by several large manufacturers, especially Cabot, and because the profit of producing black masterbatch is relatively low, many manufacturers have given up the production and improvement of black masterbatch . In the prior art, if ordinary pigment carbon black is used to directly add plastic raw materials to high-speed mixing and then granulate, the existing problem is that the dispersion of carbon black is not good, which directly affects the content of pigment carbon black in the masterbatch, which in turn affects post-processing Physical properties and appearance quality of plastic products. Contents of the invention [0003] In order to overcome the defects of the prior art and meet the growing requirements of...

AI Technical Summary

Problems solved by technology

In the prior art, if ordinary pigment carbon black is used to directly add plastic raw materials to high-speed mixing and then granulate, the existing problem is that the dispersion of carbon black is not good, which directly affects the content of pigment carbon black in the color masterbatch, which in turn will affect post-processing Physical properties and appearance quality of plastic products