PROBLEM TO BE SOLVED: To provide a multi-core type microcapsule hardly adhering to teeth even when being chewed.SOLUTION: In the multi-core type microcapsule, a film forming material is a gelatin hydrolysate whose weight average molecular weight is 10,000-40,000. The multi-core type microcapsule is produced by executing following steps 1-4. A gelatin hydrolysate whose weight average molecular weight is 10,000-40,000 and an emulsifier are added into water, and the mixture is heated to about 40-90°C to be dissolved to acquire a water phase (step 1). A core material is added into the water phase as an oil phase and stirred to be emulsified and dispersed uniformly to acquire an O/W type emulsified composition (step 2). The emulsified composition is sprayed into a tower filled with liquid nitrogen. The sprayed dispersion liquid is cooled and dropped, and changed into fine particles in the frozen state at the dropping part (step 3). The fine particles are collected and dried (step 4).COPYRIGHT: (C)2012,JPO&INPIT【課題】咀嚼しても歯に付着し難い多芯型マイクロカプセルを提供する。【解決手段】膜形成物質が重量平均分子量10000~40000のゼラチン加水分解物であることを特徴とする多芯型マイクロカプセル。該多芯型マイクロカプセルは、次の工程1~4を実施することにより製造される。重量平均分子量10000~40000のゼラチン加水分解物及び乳化剤を水に加え、これを約40~90℃に加温して溶解し水相とする(工程1)。該水相に油相として芯物質を加えて撹拌し、均一に乳化・分散させてO/W型乳化組成物とする(工程2)。該乳化組成物を液体窒素の充填された塔内に噴霧する。噴霧された分散液は冷却されて落下し、塔下部で凍結状態の微細粒子となる(工程3)。該微細粒子を捕集し、乾燥する(工程4)。【選択図】 図1
