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Rifeng PMI structural foam cores applied to the Automotive Engine Hood



With the increasingly strict requirements on energy saving and emission reductions at domestic and abroad, the demand for automotive lightweight becomes more and more urgent. On the Mid-October, 2016, the Society of Automotive Engineers of China (SAEC) released . The roadmap pointed out that compared with 2015, vehicle weight will be reduced by 10% by 2020, 15% by 2025 and 35% by 2030. Accordingly, automobile lightweight design is significantly practical for automotive manufacturers and the prospect of automotive plastics is much clearer. 


Take the automobile engine hood as an example, considering its structure, safety (strength, stiffness, modality), surface (Class A surface and painting requirements), cycle time etc., material and part suppliers propose their own solutions with composites. Today PP&LGF, which applies to engine hood with small projection area, and carbon fiber composites are into the mass production on automotive OEM factories. 


After a comprehensive comparison of material properties and processing technologies among PP, LFT and SMC etc., Hunan SanHe Auto New Material Co., Ltd.(www.sanhm.com) designed and developed lightweight engine hoods using RTM technology and into mass production. It uses GFRP skins and Rifeng® PMI rigid foam cores. The sandwich hood mechanical properties improve 10% more than metal part while the weight decreased over 30%. The RTM parts can also satisfy the requirement of Class A surface, complex surface, and reliable joint.


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