The invention relates to the technical field of insulating materials, in particular to a preparation method of moisture-resistant cross-linked polyethylene insulating material, as follows: preparation of catalyst masterbatch; preparation of silane auxiliary agent; preparation of finished product; (3.1) By mass parts, suck carbamate polyethylene and catalyst masterbatch into a mixer in proportion for mixing, and after uniform mixing, suck into a drying tower for drying to obtain raw material A; (3.2) Add raw material A and the silane auxiliary agent into a twin-screw extruder, and add an initiator for grafting of the above materials in the twin-screw extruder; (3.3) The grafted material from the twin-screw extruder is extruded by a single-screw extruder, pelletized, dehydrated and dried, then fed into a finished product silo; (3.4) Metering and packaging yield the finished product. Experiments show that the material prepared by the invention not only retains the characteristics of original silane cross-linked polyethylene, but also has the advantages of easy storage, moisture resistance and high surface smoothness of extruded plastics, suitable for replacing traditional cross-linked polyethylene insulating materials.
Area Code: CN
Application Number: CN202411253228.1
