The Application Study Of The Artificial Stone Polished Waste Powder In High Density Polyethylene

The filler of the artificial stone polishing waste powders include aluminum hydroxide,calcium carbonate and quart, which are the common filling materials of the polymer. Inaluminum hydroxide artificial stone polishing waste powder, the mass fraction of aluminumhydroxide is80%. Meanwhile, aluminum hydroxide is widely used for polyolefinhalogen-free flame retardant, which is one of the most promising flame retardants in theworld at present and has much good value of application and matket. As one kind ofgeneral-purpose plastic, the polyethylene has tremendous production and consumption. Andpolyethylene is also widely used in each domain of industrial production, such as cable,building materials, coal mine, subway tunnel, ship and so on. But the oxygen index ofpolyethylene is only18, which belongs to inflammable material. Much molten drop produceswhen polyethylene burns, which causes fire easily and threatens people’s life and propertysafety seriously. Therefore the flame retardant modification of polyethylene causeswidespread concern. Halogen flame retardants have many disadvantage factors, whilehalogen free flame retardants have a better development prospect. So the aluminumhydroxide artificial stone polishing waste powder is studied as a retardant in the high densitypolyethylene (HDPE).The surface modifiers e.g. stearic acid, silane coupling agent and titanate coupling agentwere studied separately on the modification of Al(OH)3, SiO2and CaCO3artificial stonepolishing waste powders. The oil absorption value test shows that the oil absorption value ofmodified powders falls. And scanning electron microscopy (SEM) test indicates that thedispersion of powders has been improved. After the high density polyethylene were filledwith modified artificial stone polishing waste powders, the mechanical property andprocessing flow property of the composite materials were observed and measured by thermalgravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electronmicroscopy (SEM), torque test, melt index test, tension test, bending test, impact test. Theresult shows that the surface of modified Al(OH)3and CaCO3artificial stone polishing wastepowders adsorb a large number of modifying agent by unsaturated polyester, which is out ofthe modified expectation,. Instead, the tensile strength and bending strength of modifiedcomposite system is lower than that of the unmodified composite system. However, the SiO2artificial stone polishing waste powders modified by silane coupling agent improve themechanical property of composite materials. The dispersity and compatibility betweenartificial stone polishing waste powder and HDPE were observed by scanning electron microscopy (SEM). And the combustion performance of composite materials was measueredby oxygen index, vertically and horizontal burning test. In addition, microcapsule redphosphorus was added to make the flame retardant grade of composite materials to reach thehighest V-0level (UL-94). Finally an optimal formula of composite materials comprehensiveperformance was done.The problem is solved that the artificial stone polishing waste powders’ hard using andlandfill environment pollution. Turn “waste” into wealth. And realize the waste resourceutilization. In the same time, it reduces the cost of related enterprises’ raw materia. It is easyto popularize and apply after the project is finished and it improves the development of solidsurface materials industry, which is meaningful to build a resource-conserving andenvironment-friendly society.