A kind of cross-linked polyethylene and its production process

Abstract

The invention discloses crosslinked polyethylene, relating to the technical field of macromolecular compound production. The macromolecular compound is prepared from the components of linear low density polyethylene, low density polyethylene, a catalyst, an antioxidant, a silane crosslinker, an initiator and a lubricant. A production process of the crosslinked polyethylene comprises the steps that catalyst masterbatch is pre-prepared from the low density polyethylene, a dibutyl tin dialurate compound and the antioxidant, the catalyst masterbatch, the linear low density polyethylene and the low density polyethylene are subjected to drying treatment, then are transferred with the silane crosslinker, the initiator and the lubricant together to a dynamic reaction machine for vacuumizing, heating and stirring, the mixture is fully reacted and finally enters into a static reaction machine for cooling naturally until the room temperature is reached, and bagging is performed after the inspection is qualified. The crosslinked polyethylene disclosed by the invention has the advantages of simple technology and low cost, and is environment friendly and pollution-free, the requirement of civilized production is met, and the produced crosslinked polyethylene is stable in property, low in production cost, and is suitable for large scale production.

Description

technical field [0001] The invention relates to the technical field of polymer compound production, in particular to a cross-linked polyethylene and a production process thereof. Background technique [0002] Cross-linked polyethylene is a network of three-dimensional structure formed by covalent bonds between polyethylene molecules, which can rapidly change the properties of polyethylene, make it have excellent heat resistance and insulation properties, and improve mechanical properties and chemical resistance. . my country has carried out research on silane cross-linked polyethylene since the early 1980s and made some achievements, but due to the influence of various domestic factors, the development has been very slow. With the continuous updating and development of technology, great progress has been made in silane-grafted cross-linked polyethylene technology, and it has also been applied in various aspects, especially in the field of wires and cables. The properties a...

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Problems solved by technology

However, at present, the production processes of many manufacturers have problems such as complex operation and difficult conditions to control, which in turn affect product performance.

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