Core-shell structure, preparation, medicine for external application, tape agent and cosmetic product

A tape preparation comprising a base material layer and a pressure-sensitive adhesive layer,

• wherein
• the pressure-sensitive adhesive layer comprising a core-shell structure and an acrylic pressure-sensitive adhesive,
• the core-shell structure comprising:
• a core portion containing an active ingredient, and
• a shell portion containing a surfactant having an HLB value of 4 to 14,
• the core portion being solid,
• the surfactant containing a saturated hydrocarbon group having 7 to 15 carbon atoms or an unsaturated hydrocarbon group having 7 to 17 carbon atoms, and
• the surfactant comprising at least one selected from the group consisting of sorbitan fatty acid esters, glycerin fatty acid esters, and propylene glycol fatty acid esters.