Antistatic functional masterbatch, production process thereof, and production process of polyethylene pipes

Abstract

The invention relates to an antistatic functional masterbatch, comprising, by weight, 15-30% of superconducting carbon black, 0.1-10% of a lubricant, 0.5-5% of a coupling agent, 3-11% of a dispersant, and 30-80% of linear low-density polyethylene (LLDPE). The antistatic functional masterbatch has the advantages that the addition of the antistatic functional masterbatch produced through the process to coal mine polyethylene pipes may be decreased to 18-25% so that impact strength of the mine pipes is greatly improved which is 24% higher, and product cost is greatly lowered; by using the process, a processing scheme is provided particularly for the production of antistatic functional masterbatch with pigment carbon black; the antistatic functional masterbatch produced through the process is mixed well with 75% high-density polyethylene DGDB2480 to produce coal mine polyethylene pipes, the surface resistance of the pipes may reach 2.5*10<5> Omega, with breaking elongation reaching 520%, both the surface resistance and the breaking elongation meet the standard requirements, and the pipes have smooth surface and high brightness.

Description

technical field [0001] The invention relates to the technical field of polyolefin modification and polyethylene pipes, in particular to an antistatic functional masterbatch and a production process thereof, and a polyethylene pipe production process. Background technique [0002] At present, in the production process of general plastic products, functional masterbatches need to be added to make the products have various functions. For the processing of PE pipes for mining, the market mostly uses HDPE to add antistatic masterbatch, flame retardant masterbatch or add antistatic flame retardant masterbatch to produce. At present, manufacturers mostly use high-speed mixers and twin-screw extruders to produce antistatic masterbatches. Or antistatic flame retardant masterbatch. When this process is produced, the twin-screw extruder needs to arrange and combine the screw elements. When the shear force of the screw combination is low, the carbon black is not easy to disperse, which...

AI Technical Summary

Problems solved by technology

When this process is produced, the twin-screw extruder needs to arrange and combine the screw elements. When the shear force of the screw combination is low, the carbon black is not easy to disperse, which is easy to cause product defects. When the shear force of the screw combination is high, the carbon black structure It is easy to be damaged, resulting in a decrease in electrical conductivity; when adjusting the design formula, adding a dispersant or increasing the carbon black content will not only increase the product cost, but also greatly affect the impact performance of mining pipes

Especially the use of this process is not conducive to the development and use of cheap pigment carbon black for the production of antistatic masterbatch and antistatic flame retardant masterbatch