Method and apparatus for production of microcapsules

Details Method and apparatus for production of microcapsules Method and apparatus for production of microcapsules

1982-04-27

1984-11-06

Lovering, Richard D.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

264 4, 264 44, 425 5, 425804, 4284022, B01J 1302, B28B 154, B29F 308

Patent

active

044811578

ABSTRACT:
Apparatus for continuously producing microcapsules which comprises at least one inner pipe for extruding a material to be encapsulated, at least one outer pipe for extruding an encapsulating material, the outer pipe being coaxially arranged around the inner pipe, means for delivering the material to be encapsuled to the inner pipe, means for delivering the encapsulating material to the outer pipe, at least one capsule-forming cylinder through which a coaxial jet flow of the material to be encapsulated and encapsulating material flows downwardly and through which a coagulating agent is forced to flow downwardly, a closed chamber which contains the coagulating agent and in which the capsule-forming cylinder is arranged vertically and means for delivering the coagulating agent to the chamber, which produces up to about 50,000 microcapsules per second per a set of the inner and outer pipes and the capsule forming cylinder.

REFERENCES:
patent: 2604662 (1952-07-01), Bodkin
patent: 2911672 (1959-11-01), Van Erven Dorens et al.
patent: 3092553 (1963-06-01), Fisher, Jr. et al.
patent: 4028024 (1977-06-01), Moreland
patent: 4251195 (1981-02-01), Suzuki et al.

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