Method and system for controlling microcapsule particle diameter

Details Method and system for controlling microcapsule particle diameter Method and system for controlling microcapsule particle diameter

1996-04-01

1998-08-18

Lovering, Richard D.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

738655, 252314, 425 5, B01J 1300, B01J 1302, B01J 1306, G01N 1502

Patent

active

057955069

ABSTRACT:
In a production line for microcapsules, which is provided with an emulsifying machine, an emulsion or microcapsules are automatically sampled on a on-line basis from a portion of a process pipeline, which portion is located downstream of the emulsifying machine. The obtained sample is fed into a particle diameter measuring device, and the particle diameters of the microcapsules in the sample are automatically measured by the particle diameter measuring device. A calculation is made by a process computer in order to find the difference between the measured values of the particle diameters and a desired particle diameter. The value of a rotation speed of the emulsifying machine, which value yields the desired particle diameter, is calculated in accordance with the relationship between the rotation speed of the emulsifying machine and the mean particle diameter, the relationship having been inputted previously. The rotation speed of the emulsifying machine is adjusted in accordance with the calculated value of the rotation speed, and the particle diameters of the microcapsules are thereby controlled.

REFERENCES:
patent: 4539139 (1985-09-01), Ichikawa et al.
patent: 4675140 (1987-06-01), Sparks et al.
patent: 4817446 (1989-04-01), Kanamori
patent: 4839093 (1989-06-01), Wenmaekers
patent: 5007297 (1991-04-01), Sommer
patent: 5121629 (1992-06-01), Alba
patent: 5370824 (1994-12-01), Nagano et al.
patent: 5405558 (1995-04-01), Hodosawa et al.

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