The foam ceramic filter manufacturing uses a polyurethane sponge carrier, which has a three-dimensional network structure. The density, melting point, strength, and elasticity of the polyurethane sponge have a direct impact on the product quality of the foam ceramic filter. The soft polyurethane porous mesh sponge used in foam ceramic filter manufacturing has open pores to make a porous sponge with a three-dimensional through mesh structure.
Open-cell and closed-cell polyurethane sponge
Polyurethane sponge can be divided into open cell type and closed cell type according to the cell type. Polyurethane open-cell sponge has a three-dimensional network structure, its skeleton and pores are interpenetrated with each other, and it has a high porosity (70 ~ 90%), which can effectively perform heat preservation, heat insulation, filtration and other effects. Therefore, it is widely used in metallurgy, petroleum, water conservancy, and other fields. The closed-cell polyurethane sponge has high strength and hardness, and is widely used in the fields of building boards and insulation materials.
Hard and soft polyurethane sponge
Polyurethane sponge can be divided into hard type and soft type according to the hardness of the material. Rigid polyurethane sponge plastic is mainly used for household electrical appliances, thermal insulation and waterproof spray foam, pipe insulation materials, building boards, refrigerated trucks and cold storage insulation materials, etc.; soft polyurethane sponge is mainly used for furniture and transportation Tools, various mat materials, sound insulation materials, etc.
Alumina ceramic foam filter is a low-temperature ceramic foam filter, which is mainly used for filtering non-ferrous metal melts such as aluminum and aluminum alloy. It is the largest type of ceramic foam in China. At the same time, since aluminum liquid casting is mostly a rod casting process, the size of the foam ceramic filter is larger than that of zirconia and silicon carbide ceramic foam filter. Because the filtered aluminum liquid has a lighter specific gravity, its performance requirements such as the strength of the alumina foam ceramic filter are relatively low.