Anti-aging and anti-tension flame-retardant polyethylene sheath material for refrigerator power line and making method of polyethylene sheath material

Abstract

The invention discloses an anti-aging and anti-tension flame-retardant polyethylene sheath material for a refrigerator power line. Nano-magnesium hydroxide is subjected to surface silane modification and then serves as a flame retardant, so that the hydrophobicity of magnesium hydroxide is improved to some extent, the compatibility of magnesium hydroxide in a polymer is improved, and the effects of improving the material strength and flame retardance are achieved; red phosphorus is subjected to encapsulation modification, so that the problems that red phosphorus is likely to absorb moisture and poor in safety are relieved; when heated, red phosphorus subjected to encapsulation modification forms phosphoric acid or metaphosphoric acid and then forms the strong dehydrant polymetaphosphate, so that decomposition of magnesium hydroxide is accelerated, and a synergistic flame-retardant effect is achieved. Besides, the inorganic filler attapulgite is subjected to surface chemical modification, so that the compatibility of the inorganic filler attapulgite in the polymer is improved, and the mechanical strength and wear resistance of the product are improved; in compatibility with other effective auxiliaries such as boron fibers and asphalt emulsion, the obtained polyethylene sheath material has excellent aging resistance and tensile strength.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an aging-resistant and stretch-resistant flame-retardant polyethylene sheath material for 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 electri...

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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