Seamless capsule

A seamless capsule including a filler material and a shell which encapsulates the filler, wherein

• the mass ratio of the shell to the filler material is 5:95 to 70:30;
• the shell comprises (a) a shell material and (b) a crystallization agent which is at least one or two or more selected from a group consisting of sorbitol, mannitol, xylitol, erythritol, paratinitt, lactitol, maltitol, trehalose, and saccharose;
• the shell includes crystals which are formed by deposition of the crystallization agent when a shell liquid including the shell material and the crystallization agent is hardened;
• the shell is substantially opaque due to the presence of the crystals;
• and
• the seamless capsule is manufactured by conducting the following steps A to E in order,
• step A:
• preparing a core liquid that includes the filler material and the shell liquid in which the shell material is dissolved;
• step B:
• using a coaxial multiple nozzle having an inner nozzle and an outer nozzle that surrounds the inner nozzle, supplying the core liquid to the inner nozzle and the shell liquid to the outer nozzle so as to extrude them, and forming multilayer liquid drops by extruding a multilayer jet from the coaxial multiple nozzle;
• step C:
• hardening the shell liquid while the multilayer liquid drops flow in a hardening liquid that flows through a pass, and forming seamless capsules in which the core liquid is surrounded by the shell material;
• step D:
• separating the seamless capsules from the hardening liquid that surrounds them;
• and
• step E:
• eliminating the hardening liquid adhering to the surface of the seamless capsules that have been separated from the hardening liquid, and at the same time forming seamless capsules that do not substantially stick to each other by drying their surfaces.