PROBLEM TO BE SOLVED: To further shorten a drying time without causing deformation in the coating when drying the encapsulated granules containing moisture and encapsulated by a coating material for forming the coating when the moisture is dried up using a fluidized bed dryer.SOLUTION: A method for production of encapsulated granules includes: a first drying step of suspending and making encapsulated materials 8 to flow by suppressing theoretical potential evaporation moisture ΔW so as not to cause recesses or deformation on the coating of the encapsulated materials 8, while measuring moisture contained in a venting gas or temperature, after the encapsulated materials 8 are suspended and made to flow using a fluidized bed dryer 20 and a second drying step performed after the measured moisture is decreased more than a predetermined volume or the measured temperature is increased, and setting the theoretical potential evaporation moisture ΔW when the fluidized bed dryer 20 suspends the encapsulated materials in an initial dry state for flowing to be increased in comparison with the first drying step and blowing gas therein.COPYRIGHT: (C)2014,JPO&INPIT【課題】水分を含み、水分が乾燥すると皮膜を形成する皮膜材料により被包された被包囲粒状物を、流動層乾燥機により乾燥させる際に皮膜に変形が生じることなく、乾燥時間をより短くする。【解決手段】流動層乾燥機20による被包囲体8を浮遊流動させた後に排気される気体に含まれる水分量又は温度を測定しながら、被包囲体8の皮膜に窪み、変形が生じないように理論可能蒸発水分量ΔWを抑えて被包囲体8を浮遊流動させる第1の乾燥ステップと、測定した水分量が所定の量よりも低下した、又は測定した温度が上昇した後に行われ、流動層乾燥機20を、乾燥初期状態の被包囲体を浮遊流動させた場合の理論可能蒸発水分量ΔWが、第1の乾燥ステップに比べて増加するように設定して気体を吹き込む第2の乾燥ステップと、を備える。【選択図】図3
