A liquid encapsulant component which contains an active, sensitive
encapsulant, such as a live microorganism or an enzyme dissolved or
dispersed in a liquid plasticizer is admixed with a plasticizable matrix
material. The matrix material is plasticizable by the liquid plasticizer
and the encapsulation of the active encapsulant is accomplished at a low
temperature and under low shear conditions. The active component is
encapsulated and/or embedded in the plasticizable matrix component or
material in a continuous process to produce discrete, solid particles.
The liquid content of the liquid encapsulant component provides
substantially all or completely all of the liquid plasticizer needed to
plasticize the matrix component to obtain a formable, extrudable,
cuttable, mixture or dough. Removal of liquid plasticizer prior to
extrusion is not needed to adjust the viscosity of the mixture for
formability. Release of an active component from the matrix may be
delayed or controlled over time so that the active component is delivered
when and where it is needed to perform its intended function. Controlled
release, discrete, solid particles which contain an encapsulated and/or
embedded component such as a heat sensitive or readily oxidizable
pharmaceutically, biologically, or nutritionally active component are
continuously produced without substantial destruction of the matrix
material or encapsulant.