The Study Of Structure And Mechanics Behavior Of Low Density Foamed Plastics

Low-density foamed plastic is the ideal structural material for cushioning packaging because it's the higher rate modulus of elasticity, high strength and light weight. At the same time, such material also has a good vibration, and shock absorption capacity of energy, is the most common packaging materials, especially foam polystyrene, polyethylene foam. Though with the tide of "green packaging", the use of foamed plastic was been effected, but practice proved that it is currently the most effective cushioning material. Therefore, in the process of using their excellent performance, designer should reduce material's consumption as far as possible, reduce the energy consumption during their molding process, reduce the treatment cost of the waste and develop the new foam friendly to environment.The microscopic structure of commonly used foam plastics'and the impact of factors on the microscopic structure of materials has been discussed from the issue of foam molding process, take it as the basis for study of the foam compression force - deformation, as well as related performance ratio with the foam forming density, the relationship between the micro structural parameters. Discussed the compression rate on the test results, as well as the impact of the creep properties of materials through the vibration of polypropylene foam transmission performance testing of the materials and obtained the nonlinear vibration transmission characteristic curve of EPP.The study results of the foamed plastic could be used as a guiding for the scientific and accurate design of the buffer for cushioning. At the same time the results are helpful for seeking best techniques and process of upgrading the performance of the buffer cushion, and the determination of process parameters. Thus could under the guarantee packing effect premise to retrench the use of materials as far as possible.