High-strength high-toughness polyethylene compound and preparation method thereof

Abstract

The invention provides a high-strength high-toughness polyethylene compound. The compound is prepared from, by weight, 50-100 parts of polyethylene resin, 5-20 parts of polypropylene resin, 0.5-10 parts of compatilizer, 0.5-2 parts of coupling agent, 0.2-2 parts of flexibilizer, 5-50 parts of inorganic powder, 0.05-1.5 parts of antioxidant and 2-6 parts of color masterbatch. Polyethylene resin and inorganic powder are subjected to coupling, primary plasticizing and dispersing in an internal mixer through various auxiliaries, then extruding and granulating are conducted to directly prepare the compound for producing polyethylene double-wall corrugates and polyethylene hollow-wall tubular products, the production processes and procedures are simplified, and comprehensive production cost is reduced; the ring rigidity and impact strength of the tubular product are greatly improved, the comprehensive elastic modulus of the tubular product can reach 1500 MPa or above, and the impact strength of a simply supported beam at 23 DEG C can reach 40 KJ / m<2> and is improved by about 30-50% compared with the prior art.

Description

technical field [0001] The invention relates to the field of plastic building material production, in particular to a high-strength and high-toughness polyethylene compounding material and a preparation method thereof. Background technique [0002] The existing polyethylene double-wall corrugated pipe and polyethylene hollow-wall winding pipe generally use polyethylene resin, filler masterbatch, color masterbatch, other additives and other components to be mixed into the storage hopper through simple mechanical stirring, and then extruded by a single screw. The machine melts and plasticizes under the action of external heating and screw shearing, and completes the shaping through molds and molding machines. During the production process, polyethylene resin and filler masterbatch are unevenly dispersed and mixed due to different particle sizes and weights, and are mixed with the storage hopper. There are many factors such as electrostatic adsorption and screw wear on the wall...

AI Technical Summary

Problems solved by technology

[0002] The existing polyethylene double-wall corrugated pipe and polyethylene hollow-wall winding pipe generally use polyethylene resin, filler masterbatch, color masterbatch, other additives and other components to be mixed into the storage hopper through simple mechanical stirring, and then extruded by a single screw. The machine melts and plasticizes under the action of external heating and screw shearing, and completes the shaping through molds and molding machines. During the production process, polyethylene resin and filler masterbatch are unevenly dispersed and mixed due to different particle sizes and weights, and are mixed with the storage hopper. There are many factors such as electrostatic adsorption and screw wear on the wall of the barrel, which lead to uneven distribution of the filler masterbatch in the polyethylene resin, low bonding strength of the interface between the two, and even interface delamination and detachment, resulting in fluctuations in product quality, especially It has a great influence on the ability of the pipe to withstand external loads (that is, the ring stiffness) and the impact resistance of external forces