Ultraviolet cross-linked low-smoke, halogen-free and flame-retardant polyolefin material and preparation method thereof

Abstract

The invention relates to the technical field of photoelectric cables, and specifically discloses an ultraviolet cross-linked low-smoke, halogen-free and flame-retardant polyolefin material and a preparation method thereof. The ultraviolet cross-linked low-smoke halogen-free flame-retardant polyolefin material comprises the following raw materials: a matrix resin material, a photo-initiation cross-linking agent, a flame retardant, a processing auxiliary agent and an antioxidant, wherein a photo-crosslinking auxiliary agent in the photo-initiation cross-linking agent comprises active amine withpolymerization activity and methylene bisacrylamide. The preparation method comprises the following steps: mixing the raw materials according to a specific sequence, carrying out extrusion granulating, and carrying out ultraviolet irradiation crosslinking so as to be able to obtain the ultraviolet cross-linked low-smoke, halogen-free and flame-retardant polyolefin material. Through optimization design of a formula and a process for the ultraviolet cross-linked low-smoke, halogen-free and flame-retardant polyolefin material, ultraviolet irradiation rapid crosslinking and rapid extrusion production are realized; and the ultraviolet cross-linked low-smoke, halogen-free and flame-retardant polyolefin material has the characteristics of environmental protection, high flame retardance, aging resistance and the like.

Description

technical field [0001] The invention relates to the field of polymer material preparation, in particular to a low-smoke, halogen-free, flame-retardant polyolefin material for photoelectric cables and a preparation method thereof. Background technique [0002] Low-smoke, halogen-free, flame-retardant polyolefin materials are being widely promoted and applied in the field of cable preparation due to their environmental protection, low-smoke, and non-toxic characteristics. The change of molecular structure, transforming to body shape and network molecular structure, thus greatly improving the use temperature limit, physical and mechanical properties, environmental resistance of polyolefin materials, etc. Linked technologies and processes are being actively researched. [0003] Ultraviolet light cross-linking technology was first applied to products and materials such as emulsion transparent materials, film materials, fibers, etc., due to the relatively small volume of its equi...

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Problems solved by technology

[0004] In view of the low extrusion speed of UV-crosslinked low-smoke halogen-free flame-retardant polyolefin materials in current cable materials, insufficient crosslinking degree after UV irradiation, environmental protection problems in the production process, and the volatilization and decomposition of materials such as photosensitizers etc., the present invention provides an ultraviolet light cross-linked low-smoke halogen-free flame-retardant polyolefin material and a preparation method thereof

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