Method and apparatus for production of microcapsules
First Claim
1. A continuous method for producing microcapsules which comprises extruding a liquid material to be encapsulated from an orifice of an inner pipe and simultaneously extruding a liquid encapsulating material from an orifice of an outer pipe coaxially arranged around the inner pipe, and bleeding a coaxial jet flow of the material to be encapsulated as an inner flow and the encapsulating material as an outer flow into a flow of a coagulating agent for the encapsulating material in a capsule-forming cylinder arranged just beneath the orifice of the outer pipe, the coagulating agent being contained in a closed chamber and forced to flow in the capsule-forming cylinder.
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Accused Products
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.
73 Citations
9 Claims
- 1. A continuous method for producing microcapsules which comprises extruding a liquid material to be encapsulated from an orifice of an inner pipe and simultaneously extruding a liquid encapsulating material from an orifice of an outer pipe coaxially arranged around the inner pipe, and bleeding a coaxial jet flow of the material to be encapsulated as an inner flow and the encapsulating material as an outer flow into a flow of a coagulating agent for the encapsulating material in a capsule-forming cylinder arranged just beneath the orifice of the outer pipe, the coagulating agent being contained in a closed chamber and forced to flow in the capsule-forming cylinder.
- 7. 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.
Specification