Useing Waste Fiber To Produce Insulation Wallboard

At present, the outputs of waste fiber are growing up. PP fiber is one of most quantity in the abandoned fiber, such as:discarded carpet, abandoned fishing nets etc. How to efficient and environmentally friendly recycling waste pp fiber has become the focus of the experts and scholars of the world.It is a new method to use waste fiber to produce composite material. The traditional processing waste fiber methods include burning method, buried method and biological degradation. Burning and buried methods could induce the environment using secondary pollution and waste of resources. It is too high to use biological degradation to treat the waste fiber. The biggest advantage of using waste pp fiber to produce composite material is efficient and environmentally friendly. We usually use solid waste to produce concrete walls, but rarely use waste fiber to produce insulation panels. This paper discusses the use of pp fiber production of insulation wallboard. It is mainly used in construction wall materials heat preservation of the field. It has the characteristics of light and green environmental.In this article, using the abandoned pp fiber as the raw material, have the loose, combing, acupuncture molding as insulation wall thermal insulation layer. Through the hot pressing molding of molding process, with polypropylene plastics to be strengthen material preparation into light insulation wall panels. Study the relationship between the insulation wall molding process and the wall performance. This paper analyzes the abandoned the pp fiber wall insulation preparation process. This paper mainly analyses the technology of using waste pp fiber to produce heat preservation wallboard and evaluates the insulation performance of the wall. First of all, we select tensile strength, bending strength and impact strength for test index. Second, we select hot-pressing temperature, hot pressing time, pressure and hot pressing as testing indexes to make orthogonal test analysis. From the test we can learn that the order of the factors which effect the mechanics properties of thermal insulation panels, Hot-pressing temperature> hot pressing pressure> hot-pressing time. The most significant influence factor is hot-pressing temperature. We use linear regression to analyze the relationship between mechanical properties and hot-pressing temperature. The optimum temperature is of insulation panels is182℃Finally we get the optimum technological conditions for, hot-pressing temperature is182℃hot pressing pressure is10MPa, hot pressing time is11min. The tensile properties of the plate is39.49MPa, bending strength is34.56MPa, impact is6.73KJ/m2. Moisture content0.3%, determination of thickness swelling rate of water absorption is0.2%, the rate of change after heating is±0.2%, variation of size, high low temperature variation of size is±2.5%.We test the performance of the insulation wall. The test indexes are the coefficient of thermal conductivity and thickness. The formula, R=8δ/λ; K=1/R; R0=R1+R2+R3+......+Rn. Through the test different specifications of polypropylene fiber felt that the coefficient of thermal conductivity specifications for300g m-2, when the minimum thermal conductivity. The thickness is100mm and the conductivity is0.066W/(m2·K). Its thermal resistance is2.32m2·k/w. The total thickness is300mm.In this article, using abaqus software to simulate heat transfer process of insulation panels which is made by waste fiber. The conclusion is:thermal insulation wallboard maximum temperature drop occurred in clearance. The heat transfer in the rib is greater than the thermal insulation layer, The line of temperature distribution is gradually diminishing,1℃,4℃,7℃,10℃,13℃. The temperature difference is much greater in rib than thermal insulation layer. Thermal insulation layer coefficient of thermal conductivity is small. Heat conduction is very few, the heat preservation material has good performance.The paper has a certain reference value for recycling waste fiber and uses waste fiber to produce waste heat preservation wallboard.