| 摘要 |
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 mate- rial constituting said microparticles, and possibly assisting the solvent plasticization proc- ess by heat treatment, not excluding the possibility, in less critical cases in terms of con- servation 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. |
