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US4405373A Method of altering the effective bulk density of solid material and the resulting product 失效
改变固体材料和所得产品的有效堆积密度的方法

Method of altering the effective bulk density of solid material and the
resulting product
Abstract:
A method of adjustably tailoring the effective bulk density of a solid material in which a mixture comprising the solid material, a film-forming polymer and a volatile solvent are sprayed into a drying chamber such that the solvent evaporates and the polymer dries into hollow shells having the solid material captured within the shell walls. Shell density may be varied as a function of solid/polymer concentration, droplet size and drying temperature.
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