The application of EPP Car Seat.

First, the new material EPP has changed the material choice of many industries

With the impact of the global carbon emission program, the concept of energy conservation and environmental protection has entered various industrial sectors. Foamed polypropylene (EPP) with its advantages of light weight, heat insulation buffer, has been in shoe soles, distribution boxes, model aircraft, and other light requirements of the industry has great development.

Second, the application of EPP in automobile I industry

As we all know, one of the biggest bottlenecks of new energy vehicles is endurance, and body weight is inseparable from endurance. Simple data can be referred to, 10% body weight reduction can bring 6-8% endurance increase. In the case of battery weight determination, reasonable body weight reduction is conducive to improving vehicle endurance, and car seat weight reduction has also begun development and application.

Third, EPP is used as a material for lightweight seats

By using polymer materials instead of the traditional metal frame, the seat can greatly reduce the weight of corrosion resistance and insulation.The EPP Car Seat is formed by placing the steel wire frame in the mold cavity, so that the EPP is closely bonded with it. The difference of thermal expansion coefficient of different materials will cause uneven distribution of residual stress and affect the final precision and performance of the parts. The deformation of the embedded steel wire skeleton after EPP molding was studied by changing several parameters such as the forming state and preloading time. The results show that the best size control effect of steel wire frame is achieved by using the setting tool for positioning, setting time 1h and negative tolerance of 10mm on the supporting surface under the setting tool.
In 1996, Audi incorporated PMH technology into front end modules, which reduced weight by 30% and cost by 25%. Twenty components were reduced and NVH performance improved.

The steel wire skeleton is embedded in the rear cushion EPP structure, that is, the cushion steel wire skeleton is placed in the cavity of the EPP mold, and the EPP- forming process. During the forming process of the EPP body, the shrinkage rate of the EPP can be adjusted according to the size of the product, so as to obtain the product whose size is controlled within the tolerance range, and realize the normal loading.