Study On Caragana Intermedia Fiber, Linear Low Density Polyethylene Enhance The Technology Of Paper-plastic Composite Boards

Paper-plastic composite materials with excellent properties, was widely used in food packaging, which promoted economic development and people's living standards. At the same time, the number of composite packaging waste is also increasing, causing serious pollution to the environment. In this paper, waste paper and plastic packaging used for the purpose of study as follows:1. In this thesis, recycled paper-plastic packaging and caragana intermedia fiber were used as the main material to make the composite boards, by hot-cold pressing process. The paper researched on process parameters such as the amount of caragana intermedia fiber, the amount of coupling agent, the hot-pressing temperature and hot-pressing time, which impact on the physical and mechanical properties of composite boards by using the orthogonal test method. The ideal conditions of the processing technology is that the densities of 1.0 g/cm~3 by weight, the mass fraction of caragana intermedia fiber by 20%, the amount of coupling agent of 3.5 percent, pressing time of 420s, and the pressing temperature of 170℃.2. In this thesis, recycled paper-plastic packaging and Linear low density polyethylene (LLDPE) were used as the main materials to make the composite boards, by hot-cold pressing process. As the process parameters impact on the physical and mechanical properties of composite boards, the mass fraction of LLDPE, boards densities, the hot-pressing temperature and time were studied employed the orthogonal test method. According to results, the ideal conditions of the processing technology is the mass fraction of LLDPE by 30%, the densities of 0.9 g/cm~3 by weight, the pressing time by 500s, and the pressing temperature by 180℃.3. Study on LLDPE content and the pressing temperature on the LLDPE / paper and plastic mechanical properties of composite plate. The results show that the LLDPE mass fraction, hot temperature and their interaction on LLDPE / paper-plastic composite plate of elastic modulus, bending strength, internal bond strength and thickness swelling 24h significantly affected.4. Using the ideal parameters to suppress the LLDPE / paper and plastic compound board compared with the performance of particle board, composite board In addition to mechanical properties of elastic modulus, the meet in the dry state using the furniture and interior decorative panel using the standard; 24-hour absorption thickness expansion rate than in the wet state board requirements with the use of the structure; internal bond strength is also higher than in the wet state of the structure using the request with the board. By the LLDPE / paper and plastic composite plate wet cycle test, the results show that the board has some certain durability.