Low-smoke halogen-free flame-retardant B1-grade polyolefin cable sheath material and preparation method thereof

Abstract

The invention discloses a low-smoke halogen-free flame-retardant B1-grade polyolefin cable sheath material and a preparation method thereof. The cable sheath material comprises the following raw materials in parts by weight: 60-80 parts of EVA resin, 10-20 parts of linear low-density polyethylene, 1-3 parts of maleic anhydride grafted linear low-density polyethylene, 3-5 parts of modified halloysite nanotubes, 40-60 parts of modified magnesium hydroxide, 3-5 parts of a polyphosphate flame retardant, 0.1-0.2 part of an antioxidant and 0.5-1 part of a lubricant. The cable sheath material prepared by the invention has the characteristics of low smoke and good flame retardant and fireproof properties, not only satisfies the requirements of B1-grade flame retardant properties, but also has excellent mechanical properties and a wide application range.

Description

technical field

[0001] The invention relates to the technical field of polymer materials, in particular to a low-smoke, halogen-free, flame-retardant B1 grade polyolefin cable sheathing material and a preparation method thereof. Background technique

[0002] As an indispensable part of the power system, wires and cables play an irreplaceable role in daily life, commerce, and industry. In recent years, as people pay more attention to the level of fire safety, it has become an important research direction to strengthen the prevention and control management of wire and cable fire hazards, especially to improve the fire protection ability of wire and cable. Halogen-containing flame-retardant cable materials emit a lot of smoke and corrosive gases when burned, which hinders the escape routes of personnel in closed places, and has been gradually eliminated. However, the amount of inorganic flame retardants such as aluminum hydroxide and magnesium hydroxide is large, and the compa...