A 125°C irradiation cross-linked PE cable material for UL high-temperature electronic wires and its preparation method

Abstract

The invention belongs to the preparation of cable materials and particularly relates to a PE cable material subjected to irradiation cross-linking at 125 DEG C for UL high-temperature electronic wire and preparation method of the PE cable material. The PE cable material is prepared from an effective amount of matrix resin, a compatilizer, a bromine flame retardant, an organic flame retardant, a silane coupling agent, a lubricants, an antioxidant, an anti-UV agent, and an irradiation crosslinking aid by virtue of carrying out surface activation treatment on the flame retardant, mixing in a mixer, granulating and the like, wherein the matrix resin comprises linear low-density polyethylene A, linear low-density polyethylene B and an ethylene-octene copolymer. By the preparation method, the defect that such mechanical properties as tensile strength and elongation at break of the cable material due to large filling amount of the flame retardant in the prior art can be inevitably reduced, the PE cable material has the advantages that the technical indicators such as tensile strength and elongation at break of the prepared electronic line are higher than the existing standard and the product has good flame retardant property and surface degree of finish, low cost and the like, and the situation that UL high-temperature electronic wire manufacturers can only use expensive imported cable materials to meet needs is broken.

Description

technical field [0001] The invention belongs to the preparation of cable materials, in particular to a 125°C irradiation cross-linked PE cable material for UL high-temperature electronic wires and a preparation method thereof. Background technique [0002] UL electronic wire is a general term for electronic wires that have passed UL certification. It is an electronic wire that meets the EU ROHS environmental protection requirements. It is generally used for weak current projects, such as internal connecting wires for electronics and electrical equipment. UL electronic wire has high requirements on the tensile strength, elongation at break, and fire resistance of cable materials. For example, the UL3173 high-temperature electronic wire standard stipulates that the tensile strength of cross-linked PE electronic wire irradiated at 125°C is ≥1.41 kgf / mm 2 , Elongation at break ≥ 300%, flame retardant passed the VW-1 test. At present, domestic polyolefin cable materials mainly ...

AI Technical Summary

Problems solved by technology

At present, domestic polyolefin cable materials mainly use inorganic hydroxides such as aluminum hydroxide, magnesium hydroxide, red phosphorus, and zinc borate as flame retardants. A certain flame retardant effect; as we all know, a large filling amount will inevitably reduce the mechanical properties such as tensile strength and elongation at break of the cable material

This problem has become a technical bottleneck for many domestic cable material manufacturers. UL high-temperature electronic wire manufacturers can only choose expensive imported cable materials to meet their own needs. How to solve the above problems has become an important research topic in the field of cable material production.

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