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The wood plastic material (WPC) process and equipment production
时间:2016/5/20 16:54:59

With the social development and people's living standards improve, the quality of wood products increasingly Pro gaze, also accompanied by the increasing depletion of forest resources. Plastic has many excellent and unique properties, so it has been widely used in various fields of national economy, but a lot of plastic waste has caused serious
"White pollution", so that the serious deterioration of the ecological environment. It combine the advantages of plastic and wood and the waste of the natural plant fiber (rice straw, peanut shell, coconut shell, sugar cane, flax, hemp, jute, hemp, etc.), wood fiber (wood powder, sawdust, wood shavings, etc.) and recycled plastics (good) model of wood plastic composite materials, research and development, to protect the global forest resources and human ecological environment has important application value and significant economic and social benefits. To this end, the wood powder filling and modification of plastics has already begun research at home and abroad. Domestic and international wood composites developed very rapidly in recent years, especially high share of wood powder filling is in recent years a great development, and have got a wide application in many fields. There is consumption of wood and plastics in our country and a serious shortage of wood resources, the research and development of wood plastic composites has important significance.
The project adopts PVC resin, sawdust or wood powder and as the main raw material, through mixing, processing and molding process, the successful development of the PVC / sawdust composite. Excellent mechanical properties of the wood plastic composite and absorbent very filial piety good decorative effect, easy processing, biological degradation, new opportunities for a new environmental friendly materials and can be widely used in packaging materials, building decoration materials, and so on many aspects.
The quality of wood products and wood powder and plastic formulations have great relationship, formulation of quality directly affects the product processing technology and product quality. Formula of wood products generally covers wood powder, plastics, filling material and additive etc., each manufacturer to produce their own wood products, the proportion of the added is different. Secondly, the formula of raw materials is based on different kinds of the production of products, then add different types of plastics, processing formula of different proportion, each manufacturer their mastery of the formula, as long as it is to mainly is to make several additives and raw materials mixing, extrusion production and to do the preparatory work. Plastic wood technology used in wood powder without the strict requirements, all kinds of wood wood powder and all kinds of plant fiber and other general can be used (produced during the processing of wood sawdust, waste after crushing), did not affect the machining, the main requirement of various wood powder particle size in general 20 ~ 100 mesh, on this basis to ensure the wood powder and plastic in front of the mixed drying. General wood powder water content should be controlled within 3%. Drying equipment can be used electric heating, microwave heating can also be used for drying or natural drying. After drying the wood powder should be stored in the dry place (indoor), can not be two times of moisture absorption, otherwise it will have a greater impact on the processing. Need mentioning is that in extruding machine with exhaust function, especially in twin screw extruder processing wood materials, not wood powder were special drying treatment, only sunlight natural drying can direct extrusion processing.

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