The research and development of bio based fiber plastic composites that can be produced on a large scale has been successful.
recently, researchers at the camness University of technology in Germany have developed a series of bio based fiber plastic composites that can be produced on a large scale, which can be used as substitutes for glass and carbon fiber reinforced plastics
Ahmed amine ouali, a researcher at the lightweight structure Institute, said: "we use natural fibers such as flax to replace glass fibers or carbon fibers, and our plastic matrix is a renewable biopolymer. Therefore, the carbon footprint of products is significantly better in the life cycle." The researchers also said that using continuous filaments can make the composite very hard in the fiber direction, and the rigidity will also become very good
the main goal of researchers is to develop a program to make the maximum moving speed of pistons made of plastic and natural fibers: 70mm/min; The semi-finished products can be produced on a large scale. At present, thin film stacking technology is the most common practice. In this process, single-layer materials (such as plastic film or non crimped fabric plus plastic film) are stacked layer by layer in the hot press, melted under pressure, and further processed into plates in another machine. For the factors that affect the smooth function of smooth oil in continuous process, the following are important: merge researchers must design a new calender
uali said: "compared with glass fiber or carbon fiber, natural fibers have special characteristics: they are easy to absorb liquids. Therefore, they must be dried before processing. In the Institute, we have developed a dryer, which can be rolled up and closely connected with the calender, with almost no gap. In this way, the dried fibers will hardly have any contact with the wet environment."
the newly developed Omega calender is composed of several cylinders. In theory, flax fiber plastic film can be guided, heated and pressed together continuously. After the impregnation process and the cooling of the thermoplastic prepreg, the semi-finished fiber matrix is processed. It can be rolled up and further processed in various ways. By pressing the multilayer film to the required size, a rigid plate can be prepared. Ouali said, "we can also form semi-finished products again and combine them with injection molded products."
the production process is intermittent at present. After continuous production of prepreg semi-finished products, its metal replacement ability and fire, heat and chemical resistance will be stopped for a period of time. Production will continue in many different factories as needed. Researchers say that with regard to mass production, manufacturing paths can be supplemented or combined accordingly
ouali said, "we will further try various fiber structures similar to knitted or non crimped fabrics, or combine them with different substrates (such as films or spunbonded fabrics) in other forms."