Research And Development Of Composite Sheet Prepared By Using Vegetable Fiber And Waste PP

With the development of the plastic industry rapidly, more and more waste plastics are produced inevitably. Traditional processing methods not only take more wastes, but also pollute environment. Therefore, how to process these waste plastics has become the task which must be urgently studied in the world. The natural vegetable fiber materials are the richest natural polymer materials. Besides their physical performances are close to the inorganic textile fiber, they have the most prominent biodegradable and renewable merits than reinforced fibers. So they have a broad development prospect.Under the background, through referring to more references and investigating, the work's research aims and contents were decided. Firstly, the vegetable fibers were pretreated by NaOH solution, and through the micro morphology observation and mechanical properties testing, the best pretreatment method was determined. Secondly, using the vegetable fibers of pretreatment, the ideal vegetable fiber-reinforced composites forming technology, which includes the fiber concentration , the isothermal temperature, the heating time and molding pressure, had been explored. Finally, based on the composites sheet forming technology developed early, the composition of the vegetable fiber reinforced waste plastic composites sheet was studied. Through above researches, the formulation and molding technique of a new kind of the vegetable fiber reinforced waste plastic composites sheet were developed. The former results are that the quantity proportion between pure and waste PP is 1:4, the content of vegetable fiber is 25%, MAH-g-PP's content is 4%, and KH-550 is added by 1%. The later is that 180℃isothermal temperature, 3 hours heating time and 2MPa molding pressure.