Light-weight high-temperature-resistant flame-retardant polyethylene material for geogrids and manufacturing method thereof

Abstract

The invention discloses a light-weight high-temperature-resistant flame-retardant polyethylene material for geogrids. The nano magnesium hydroxide is subjected to surface modification by siloxane to obtain a flame retardant, thereby improving the hydrophobicity of magnesium hydroxide to some extent, enhancing the compatibility of the magnesium hydroxide in the polymer, and achieving the effects of enhancing the mechanical properties and flame retardancy of the material. The red phosphorus is subjected to encapsulation modification to improve the problems of high moisture absorption tendency and poor safety in the red phosphorus; and the encapsulation-modified red phosphorus is heated to form phosphoric acid and metaphosphoric acid so as to form the strong dehydrating agent polymetaphosphoric acid, thereby accelerating the decomposition of the magnesium hydroxide and performing the synergic flame-retardant function. The inorganic filler citrus residue surface is subjected to chemical modification to enhance the compatibility in the polymer and improve the mechanical strength and wear resistance of the product; by compounding other effective aids, the prepared polyethylene material has favorable flame retardancy; and when the polyethylene material is used in the geogrid material, the prepared finished product has the advantages of light weight, high temperature resistance and wide application prospects.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a light-weight, high-temperature-resistant flame-retardant polyethylene material for geogrids and a manufacturing method thereof. Background technique [0002] Plastic geogrid is made of polypropylene (PP) or high-density polyethylene (HDPE) with additives added to the extruder, heated and melted, and then extruded by a special rotating head under the pushing action of the screw. Mesh new plastic engineering material. Among them, high-density polyethylene geogrid has the characteristics of light weight, high strength, corrosion resistance and impact resistance, and long service life. It is often used in various aspects such as highways, railways, docks, coal mine false roofs, and building safety. However, high-density polyethylene is a flammable material, and it is not easy to extinguish after being caught on fire, which affects the application of high-density polyethy...

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 the decline of some mechanical property parameters of HDPE, and the compatibility between the inorganic filler and the organic polyethylene is not good, and the surface of the inorganic material needs to be carried out. Modification can be better compounded with the matrix, the preparation process is more complicated, and the cost is higher