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Ultra High Molecular Weight Polyethylene Corrugated Beam Guardrail, Guardrail Tube, Column

Jul 01, 2019

The purpose is to provide an ultra-high molecular weight polyethylene highway guardrail material and an economical manufacturing method thereof, which is higher in cost performance than the steel corrugated beam guardrail board, guardrail tube, column and the like which are widely designed and applied at present, and the basic composition of the guardrail material is Ultra-high molecular weight polyethylene with a molecular weight of more than 6 million, the longitudinal tensile strength of the ultra-high molecular weight polyethylene highway guardrail material using the method is 180-480 Mpa, the elongation at break is 45-450%, and the transverse tensile strength is 120-350 Mpa. The elongation at break is 60-800%, and the impact strength of the simply supported beam of the notched specimen is greater than 150KJ/m2; the preferred longitudinal tensile strength of the UHMWPE guardrail material and its products is 4/5 of the Q235 carbon steel, and the longitudinal elongation at break It is 2.5 times more than Q235 carbon steel. The ultra-high molecular weight polyethylene highway guardrail material is manufactured by the following raw materials and methods, and the ultrahigh molecular weight polyethylene highway guardrail material which can easily make the above mechanical properties according to the method by appropriately adjusting the process parameters and the raw material formula. As the main element of the ultra-high molecular weight polyethylene road guardrail material, the UHMWPE raw material has a molecular weight of 5-10 million, preferably 6 million, which is more preferably 5.5 million┬▒ considering the balance of mechanical properties, processability and economy. 500000. For long-term dimensional stability, the UHMWPE article can be heat set at 100-120 ┬░ C for 10 to 360 seconds after tensioning in the longitudinal direction and then cooled. The method of manufacturing ultra-high molecular weight polyethylene as a base material for highway guardrail material, the cost performance is much higher than the conventional UHMWPE conventional sintered and extruded products manufactured by the prior method, and the continuous extrusion and tensile strengthening ultra-high molecular weight polyethylene guardrail products can be made. Round tube, square tube, wire, instead of steel corrugated beam guardrail column, guardrail tube, galvanized steel cable; biaxially stretched ultra-high molecular weight polyethylene can be made into corrugated beam guardrail instead of hot-dip galvanized carbon Steel fence board. Based on the same impact load, the ultra-high molecular weight polyethylene highway guardrail material using this method can have a longer deformation under the same impact energy, compared with the existing carbon steel guardrail. The time and the larger elastoplastic deformation area and deformation amount reduce the damage to the vehicle and the occupant, and the safety is better. For different allowable vehicles to exceed the displacement size and use occasions, it is possible to design ultra-high molecular weight polyethylene highway guardrail materials with different mechanical properties and different cross-sectional areas (width and thickness are appropriately increased). According to the manufacturing method of the present invention, a street lamp pole made of ultra high molecular weight polyethylene can be manufactured instead of a hot-dip galvanized carbon steel pole.