Flame-retardant polyethylene material with high environmental stress resistance for geogrids and manufacturing method of flame-retardant polyethylene material

Abstract

The invention discloses a flame-retardant polyethylene material with high environmental stress resistance for geogrids. After the surface of nano magnesium hydrate is modified by silane, the nano magnesium hydrate is used as a flame retardant, the hydrophobicity of the magnesium hydrate is improved to a certain degree, the consistency of the magnesium hydrate in a polymer can be improved, the effect of improving mechanical property and flame retardance of the material is achieved, red phosphorus is modified by capsulation, the problem that the red phosphorus absorbs moisture easily and is poor in safety is solved, the red phosphorus which is modified by capsulation is heated to form phosphoric acid and metaphosphoric acid, polymetaphosphoric acid used as a strong dehydrating agent is formed, decomposition of the magnesium hydrate is accelerated, and synergistic flame retardant effect is achieved. The surface of expanded perlite as an inorganic packing is chemically modified, the consistency of the expanded perlite in the polymer is improved, mechanical strength and wear resistance of the product are improved, the polyethylene material which is prepared by combining other effective auxiliaries is good in flame retardance, a finished product which is used for the geogrid material has the advantages of high strength, good toughness, high heat resistance, high environmental stress resistance and the like, and is wide in use range.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a flame-retardant polyethylene material for geogrids with strong environmental stress resistance 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 polye...

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