PROBLEM TO BE SOLVED: To provide a technique of unglazed particles having an open-porous outer shell part in which a functional material can be efficiently sealed and which can float on a water surface or in water or can be spread in a state of sedimentation on the bottom of a water tank.SOLUTION: The particles 1 for leaching out drug effect are the unglazed particles each having an appropriate three-dimensional shape having a hollow part 3 provided in the shape and an open-porous outer shell part containing countless fine pores of nano size in part or all of the outer shell part. The hollow part 3 is filled with a functional drug 4 from an injection hole 30 located in an appropriate place of the outer shell part. The functional drug 4 can release a desired active component into a liquid 8 in which the particles are immersed and/or into a predetermined gas through the countless fine pores in the outer shell part. The injection hole 30 is filled with an insoluble raw material 5.COPYRIGHT: (C)2010,JPO&INPIT【課題】 連通状多孔質とした外殻部からなる素焼き粒体の内部に機能性物質を効率的に封入可能とし、水面や水中に浮遊可能としたり、または、水槽などの床上に沈降状に散布したりすることが可能な素焼き粒体技術を提供する。【解決手段】 内部に中空部3を確保した適宜立体形状で、その一部または全部を、ナノサイズの無数の微孔からなる連通状多孔質とした外殻部からなる素焼き粒体であって、該外殻部適所の注入孔30から該中空部3に、該外殻部の無数の微孔を通じて浸漬した液8中か、または、所定気体中かの少なくとも何れか一方の流体中に所望する有効成分を放出可能な機能性薬剤4を装填した上、同注入孔30は、不溶性素材5で充填されてなるものとした薬効浸出粒1である。【選択図】 図5
