Crosslinked polyethylene special material for rotational moulding

Abstract

The present invention relates to a rotational moulding cross-linked polyethylene special-purpose material. It contains the following components: (by total weight of linear low-density polyethylene and low-density polyethylene) A. linear low-density polyethylene 70-90%; B. low-density polyethylene 10-30%; C. cross-linking agent 0.5-5%; and D. antioxidant 0.1-1%. Said invention also relates to a preparation method for using said special-purpose material. The special-purpose material composition can be molten and mixed in a mixer or twin screw extruder machine, blending temp. is 130-170 deg.C, the invented polyethylene special-purpose material can be obtained. The rotational moulding product prepared by said special-purpose material has good working property, high resistance to implact shock, good resistance to thermal creep and low-temp. toughness, etc.

Description

technical field

[0001] The invention relates to a special cross-linked polyethylene material for rotational molding. 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 the late 1970s, linear low-density ...

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