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YAMAGUCHI MICA CO., LTD. has been manufacturing ground mica powder and
other processed items since the foundation in 1951.
The needs of mica powder has been increasing with risen attention because
the mica generates a synergistic effect being used as a material in cosmetic,
plastics and paint. We have been pursuing technology development in order
to respond the needs of customer.
Manufacturing process of mica powder is classified in two types; one is
wet-grinding using water, another is dry-grinding without water. The figure
below explains the manufacturing process of both methods..
Wet-grinding method creates flat and smooth powder with high aspect ratio as the breaking force is absorbed with water. In addition, high refinement and fine size adjustment are possible because removal of impurities such as iron, etc and sizing of particles are done in slurry.
Comparing dry-grinding, it is less efficient on grinding and needs complicated
equipment and process (dehydration, drying, heat treatment). And it results
in small production capacity and high cost.
However, we stick to this method as put our priority on high quality and
performance produced by wet-grinding method. |
One of the characteristics of mica is that grinding produces flaky powders
with high aspect ratio (long diameter/ thickness) which is the most important
factor and determines the performance of particle. Our original grinding
machine developed as the result of trial and error succeeded in production
of mica powder which is extremely thin and has high aspect ratio and smooth
surface. And our highly accurate classification techniques enables to provide
the product with the particle size most appropriate to the needs of our
customer.
The photos show SEM views of mica powder processed with Yamaguchi wet-grinding,
commercial ball-mill wet-grinding and jet-mill dry-grinding. Particles
of our product are flatter,smoother and thinner and this is the reason
why our products are appreciated and differentiates the performance which
creates excellent effect that other makers can never realize. |
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| YAMAGUCHI wet-ground mica |
Ball-mill wet-ground mica |
Jet-mill dry-ground mica |
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| Copyright 2012 by YAMAGUCHI MICA CO.,LTD. All rights reserved. |
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