High-barrier-property flame-retardant polyethylene sheath material for refrigerator power line and manufacturing method of high-barrier-property flame-retardant polyethylene sheath material

Abstract

The invention discloses a high-barrier-property flame-retardant polyethylene sheath material for a refrigerator power line. Nano-magnesium hydroxide serves as a flame retardant after being subjected to surface modification, the hydrophobicity of magnesium hydrate is improved to a certain degree, the compatibility of magnesium hydrate in a polymer is improved, the effect of improving the mechanics and flame retardance of the material is achieved, red phosphorus is modified in a capsulated mode, the problems that red phosphorus is subjected to moisture absorption easily, and safety is poor are relieved, red phosphorus subjected to capsulated modification is heated to form phosphoric acid and metaphosphoric acid, then a strong dehydrating agent polymetaphosphate is formed, decomposition of magnesium hydrate is accelerated, and the synergistic flame-retardant effect is achieved. The surface of inorganic filler montmorillonoid is subjected to chemical modification, the compatibility of the inorganic filler montmorillonoid in the polymer is improved, the mechanical strength and abrasion resistance of the product are improved, and the polyethylene sheath material prepared through compatibility with other effective auxiliaries has an excellent high barrier property for an organic solvent.

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-barrier 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 insulation, mechanical...

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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