The pore surface of PMI foam is composed of real solid parts

PMI foam'>PMI foam is made by heating methacrylic acid and methacrylonitrile copolymer board and foaming. Foaming in the cavity makes it difficult to guarantee the quality, uniformity and mechanical properties of the foam. The foaming temperature is above 170oC , Varies according to density and model. In the process of foaming the copolymer board, the copolymer is converted into polymethacrylimide.

However, the pore surface of PMI foam is composed of real solid parts. By calculation, if PMI foam is used as the structural unit of the sandwich structure, the panel can reduce 1-2 layers of carbon fiber layup. The PMI foam sandwich structure can be used as a structural sandwich structure. The compression deformation mechanism of closed-cell foam consists of three parts: cell wall bending, edge contraction and film extension, and the pressure of the enclosed gas. Although the foam has initially closed pores, its stiffness is entirely derived from the pore edges, and its modulus is equivalent to that of open-cell foam. PMI foam is the current specific strength and The polymer rigid foam material with the highest specific stiffness.

The structural advantage of the PMI foam sandwich structure is in the sandwich structure , PMI foam material can be used as a structural unit. The main reason is that the foam materials used in the past, such as Wholesale Radom foam Manufacturers PUR foam, are generally empty after the structure is completed. PMI foam adopts a unique solid foaming technology, and the quality, uniformity and mechanical properties of the foam can be guaranteed. PMI foam, core material foam, high temperature resistant foam The use of rigid polyurethane core foam plastic is gone.

The application field breaks through the traditional view of unstructured sandwich structure such as honeycomb in the past. In the past, foam was only used as a filling material, without considering the contribution of its strength and stiffness to the structure. These pore surfaces will increase the stiffness of the porous body