FIELD: chemical engineering. SUBSTANCE: materials contain functional filter component and matrix component, softening temperature of the latter being lower than that of the former and the former being closely bound to the latter. Products manufactured from these materials contain functional filter component such as biogenic silicon dioxide (in particular diatomite) product or naturally occurring glass (in particular expanded perlite) product. Functional filter component contains filtration-appropriate structure consisting of entangled pores and which, when heated, sinters with matrix component such as glass, crystalline mineral, thermoplastics, and metals. EFFECT: increased permeability, reduced density of centrifuged wet material, and decreased content of cristobalite. 32 cl, 8 ex
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Authors
Dates
2001-12-20—Published
1996-06-17—Filed