s Dr. Andrew Szegvari prepared to
display his new liquid latex process for making
rubber goods at an exhibit in Paris, he
needed an extremely fine sulfur dispersion
to complete the vulcanizing process.
Conventional ball milling methods in 1922
would have taken as long as a week to
obtain the fineness he required.The
problem…not enough time.
Szegvari hit upon the idea of using pebbles,
a gallon can, a drill press, and a special
agitator he designed for the drill bit to achieve
a fine dispersion. In less than an hour, he invented
an apparatus that would produce exactly what he needed.
That first apparatus, employing the dynamics of grinding
media in random motion, marked the beginning of a new
media milling technology, a process now known as Attritor
grinding and dispersing.
In 1946, Dr. Szegvari founded Union Process, operating in a
small plant in downtown Akron, Ohio.The new company’s
mission was to develop grinding and dispersing technology
to help customers make fine dispersions quickly, reliably,
The original Szegvari Attritor
, a batch machine, evolved
into new machine designs—Continuous Attritors for on-
line production, Circulation Attritors for very narrow
particle size distribution and even small media mills for
grinding to submicron or nano-range particles.
After more than 20 years of constant growth, the
company moved in 1968 to its present location,
a custom-built research, design, and production center
just outside of Akron.This Midwest location provides
convenient access for customers who choose to visit
the Union Process headquarters.
From need To invenTion
Union Process Today
Scores of patents, refinements and advancements later,
Union Process milling technology now plays a vital
role for many Fortune 500 companies in a
wide array of industries including chemicals
and tungsten carbide. In addition, the
foremost chocolate and confectionary
processors, ink, paper, agricultural flowables,
metal, magnetic oxide, coal, mineral, rubber,
pharmaceutical, cosmetic and ceramic
producers all employ Union Process
Union Process maintains a global network of
licensees and agents with the expertise to assess,
analyze, sell and service customers’ needs.
Whether it is manufacturing innovative laboratory mills
for R & D or producing large mills capable of grinding
tons of material per hour, Union Process is dedicated
to remaining on the forefront of milling technology.
Today, in addition to building its line of grinding and
dispersing equipment, Union Process maintains a tolling
processing plant and research lab that helps companies
develop and produce their products.