High-thermal-conductivity flame-retardant polyethylene sheath material for refrigerator power line and preparing method thereof

Abstract

The invention discloses a high-thermal-conductivity flame-retardant polyethylene sheath material for a refrigerator power line. According to the polyethylene sheath material, nano-magnesium hydroxide is subjected to silane surface modification and then serves as a flame retardant, so that the hydrophobicity of magnesium hydroxide is relieved to some extent, the compatibility of magnesium hydroxide in a polymer is improved, and the effects of improving the mechanical performance and flame retardance of the material are achieved; red phosphorus is subjected to encapsulation modification, so that the problem that red phosphorus is likely to absorb moisture and poor in safety is relieved; encapsulation-modified red phosphorus forms phosphoric acid or metaphosphoric acid when heated and then forms strong dehydrant polymetaphosphate, so that decomposition of magnesium hydroxide is accelerated, and synergistic flame retardation is achieved. Besides, inorganic filler hemp stalk ash is subjected to chemical surface modification, so that the compatibility of inorganic filler hemp stalk ash in a polymer is improved, and the mechanical strength and abrasion resistance of the product are improved; through compatibility of the material and other effective auxiliaries, the obtained polyethylene sheath material has high thermal conductivity and broad application prospects.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a flame-retardant polyethylene sheath material for high thermal conductivity refrigerator power cords and a manufacturing method thereof. Background technique [0002] As we all know, the power cord is a wire that transmits current, and the sheath is an indispensable structural part of the power cord, which plays the role of protecting the insulation of the wire, ensuring the safety of the power cord, insulating the conductor from water, air and other media, and avoiding leakage Phenomenon. The sheath of the refrigerator power cord can be divided into an outer sheath and an inner sheath. The outer sheath is also called the protective sheath. It is the outermost sheath of the refrigerator power cord. This outer sheath protects the power cord. role. High-density polyethylene (HDPE) is the most widely used general-purpose plastic. Because of its good electrical insulatio...

AI Technical Summary

Problems solved by technology

From the perspective of environmental protection, it is commonly used to add inorganic fillers to high-density polyethylene, such as calcium carbonate, talcum powder, glass beads, mica, etc., although it can improve the strength, rigidity, and dimensional stability of the material. However, The relative density of these inorganic fillers is relatively high, adding to the polymer makes the relative density of the prepared composite material high, resulting in an increase in product quality, and the compatibility between inorganic fillers and organic polyethylene is not good, so it is necessary to modify the surface of the inorganic materials. Better compound with the matrix, the preparation process is more complicated, and the cost is higher