Special cross-linked polyethylene material for rotational molding and preparing process thereof

Abstract

The invention relates to a crosslinked polyethylene single-purpose material for rotational moulding which comprises (by weight percent) linear low density polyethylene 70-90%, low density polyethylene 10-30%, cross linking agent 0.5-5%, anti-oxidant 0.1-1%. The invention also relates to the process for preparing the special-purpose material. The rotational moulding product prepared by the single-purpose material has good processing characteristics, fine impact strength, thermal creep resistance and low-temperature flexibility, good penetrability resistance and chemical environmental resistance.

Description

technical field [0001] The invention relates to a special cross-linked polyethylene material for rotational molding and a preparation method thereof. Background technique [0002] Rotational molding is one of the methods of forming large and medium-sized products. This process originated in the United States in the 1940s. Due to various reasons, it has developed slowly and is limited to the processing of a few plastic products. In recent years, due to the development of plastics and their powdering, the gradual expansion of the application field of plastics, and the superiority of this process, it is developing rapidly. At present, the proportion of various types of rotationally molded polyethylene materials in foreign countries is roughly: 65% for linear low-density polyethylene (LLDPE), 20% for cross-linked polyethylene (XHDPE), 10% for high-density polyethylene (HDPE), and 10% for low-density polyethylene (LDPE). Polyethylene (LDPE) is 5%. In th...

AI Technical Summary

Problems solved by technology

However, LLDPE still has defects such as poor processability, thermal creep resistance, low temperature impact resistance, and swelling resistance, which undoubtedly limit the application range of LLDPE.

Images