Flame-retardant polyethylene sheath material for high-toughness refrigerator power line and production method flame-retardant polyethylene sheath material

Abstract

The invention discloses a flame-retardant polyethylene sheath material for a high-toughness refrigerator power line. The flame-retardant polyethylene sheath material has the advantages that silane modification is performed on the surface of nano magnesium hydroxide, the modified nano magnesium hydroxide is used as the flame retardant, and accordingly the hydrophobicity of the magnesium hydroxide is improved to a certain degree, the compatibility of the magnesium hydroxide in polymer is increased, and the mechanical performance and flame retardance of the material are improved; the encapsulation modification of red phosphorus improves the problem that the red phosphorus absorbs moisture and is poor in safety, the encapsulation modified red phosphorus forms phosphoric acid and metaphosphoric acid when being heated, then a strong dehydrating agent polymetaphosphate is formed, the decomposition of the magnesium hydroxide is accelerated, and a synergistic flame retardant effect is achieved; chemical modification is performed on the surface of inorganic filler oyster shell powder, the compatibility of the oyster shell powder in polymer is increased, the mechanical strength and toughness of the material are improved, and the polyethylene sheath material prepared by the raw materials coordinated with other effective auxiliaries is high in tensile strength and bending strength and promising in application prospect.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a flame-retardant polyethylene sheath material for a high-toughness refrigerator power cord 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, mechani...

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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