Polyolefin communication cable material used in rail transportation, and preparation method thereof

Abstract

The invention discloses a polyolefin communication cable material used in rail transportation, and a preparation method thereof. The polyolefin communication cable material is composed of, by weight, 40 to 60 parts of ethylene-vinyl acetate copolymer, 40 to 60 parts of propylene-ethylene block copolymer, 10 to 20 parts of an interface compatilizer, 140 to 180 parts of a fire retardant, 1 to 2 parts of a composite antioxidant, 5 to 10 parts of an antiwear additive, 1 to 2 parts of an ultraviolet light absorber, 2 to 4 parts of a lubricating agent, 2 to 3 parts of a water resistance agent, and 1 to 2 parts of a metal deactivator. The polyolefin communication cable material is high in strength, and excellent in wear resistance; possesses petroleum butter resistance, environmental stress crack resistance, hydrophobicity performance, watertightness, weatherability, excellent physical and mechanical properties, electrical performance, and excellent extrusion processability; and is capable of resisting a temperature as high as 105 DEG C; the preparation method and formula are simple; no toxic substance or waste gas is generated in production process; the compatibility of the above ingredients is excellent, and processing fluidity is excellent; the flame resistance is capable of satisfying requirements in UL-94 V-0 vertical flame test; and oxygen index value is equal to or larger than 38%.

Description

technical field [0001] The invention belongs to the field of material chemistry and relates to a composite material, in particular to a polyolefin communication cable material for rail transit and a preparation method thereof. Background technique [0002] Electric wires for rail transit are used in a non-sealed environment with high vibration, high temperature and serious oil pollution, and are often pulled and slid, so the insulating sheath material needs to have good flame retardancy, heat resistance, weather resistance, oil resistance, water resistance, and scratch resistance and other performance. [0003] Polyolefins are inherently flammable substances, however, flame retardancy is required in many applications such as cables and wires used in the electronics or electrical industries. In order to obtain polyolefin compounds with good flame retardancy, some additives are often added to them, such as: halogen-based chemicals, phosphate-based chemicals or inorganic hydro...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, heat-resistant rail transit wires generally use expensive engineering plastics polyphenylene ether or polyphenylene sulfide or thermosetting materials with complex preparation processes and cannot be recycled, such as nitrile rubber, cross-linked polyethylene, etc.

Although there have been many reports on the preparation technology of thermoplastic halogen-free flame-retardant polyolefin cable materials in recent years, such materials are not resistant to high temperature, water barrier, scratch resistance and flexural resistance.

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