Abstract: Method for producing shaped polymeric microparticles of non-spherical shape, comprising the steps of: placing one or more microparticles of substantially spherical shape in a respective micro-cavity of a mold having the desired non-spherical shape; subjecting said microparticles to softening by exposure to a solvent or mixture of solvent/non-solvent, in the liquid or vapor state, adapted to plasticize the polymeric material constituting said microparticles, and possibly assisting the solvent plasticization process by heat treatment, not excluding the possibility, in less critical cases in terms of conservation of the microstructure, of carrying out heat treatment exclusively, at a temperature not exceeding 40% of the glass transition temperature of the polymer material; and removing said microparticles from the mold cavities.

Abstract: Method for producing shaped polymeric microparticles of non-spherical shape, comprising the steps of: placing one or more microparticles of substantially spherical shape in a respective micro-cavity of a mould having the desired non-spherical shape; subjecting said microparticles to softening by exposure to a solvent or mixture of solvent/non-solvent, in the liquid or vapour state, adapted to plasticize the polymeric material constituting said microparticles, and possibly assisting the solvent plasticization process by heat treatment, not excluding the possibility, in less critical cases in terms of conservation of the microstructure, of carrying out heat treatment exclusively, at a temperature not exceeding 40% of the glass transition temperature of the polymer material; and removing said microparticles from the mould cavities.