Standard-sized aluminum hydroxide is the leading aluminum hydroxide produced with Bayer process and is used as a highly pure aluminum source for base materials of chemical products, glass, catalysts, etc. The PCH-W grade, a highly-reactive aluminum hydroxide with moisture content of about 8%, and is suitable for base material to produce aluminum salts and aluminates by reaction with acids and alkalis. The H-10 grade, a dry aluminum hydroxide, isused for flame-retardant building material, glass, and catalysts

Aluminum hydroxide is violently decomposed by dehydration at 200-350°C, accompanied by substantial heat absorption. Therefore, aluminum hydroxide filled in rubber, plastic, or paper minimizes its temperature increase even if heated, promotes self-extinguishing performance, and reduces the release of fumes. In addition, Aluminum hydroxide generates no poisonous gas and consequently functions as an excellent flame-retardant filler. It also improves the arc resistance and tracking resistance of plastic. For these purposes, fine or extra fine particles (PCH-42M and PCH-43M) are mainly suitable.

HP series is mono particle shape, and specific surface area is relatively smaller even though the particle size is smaller. These products (HP-350) has superior heat resistance since impurity (Na2O) is low.

In order to expand usage of aluminum hydroxide, which has superior characteristics such as high flame retardant and low smoke evolution, we have various kinds of specialty processed products including those with improved compatibility with rubber and plastic.
(1) Product processed with coupling agent.
(2) Low-viscosity product.
(3) Low electrical-conductivity product.
(4) Product processed with stearic acid.

High whiteness aluminum hydroxide is precipitated from organics-free, highpurity sodium aluminate solution. Taking advantage of its optical characteristics (with refractive index of 1.57), aluminum hydroxide is used as an artificial marble filler made from unsaturated polyester resin or acrylic resin. We also provide specially processed products in addition to various brands ranging from standard-sized to fine particles, depending on the purpose of use. HS series is the grade with a quality design exclusive for artificial marble, and has round-shaped particles with less fine powder. Because of that, the specific surface area is smaller and the ambient-temperature curing rate is higher than conventional series.

Standard-sized alumina is the most general alumina with mean particle diameter of about 60μm and ultimate crystal diameter is controlled. A-12 is alumina calcined at high temperature and consists of relatively large ultimate crystal particles. A-13 series consists of fine and uniform ultimate crystals and is highly thermal-reactive, with 3 grades depending on ultimate crystal size.
Coarse alumina is coarser than standard-sized one and characterized by low soda contents, with low dusting and high fluidity.

A-42 series is the most general fine-particle alumina used for refractory and porcelain. A-420 has high compressed bulk density and high thermal reactivity, so dense sintered compact can be obtained. A-43 series of minute alumina is excellent in sintering activity and has 2 grades depending on ultimate crystal particle diameter.

Low soda alumina is widely used for electronic parts including IC boards and IC packages as well as base material of spark plug and other electrical insulating ceramics. We can provide standard-sized and fine-sized low soda alumina with soda content, ultimate crystal size, and shape and size distribution adjusted in production using our proprietary technology

Thermally reactive alumina products are used in making ceramics and refractories, as well as for polishing use, because of their being not only convertible into high density ceramic products at low temperatures but also of their offering advantageous properties such as extra fine particle sizes (AL- 160SG series), and low viscosity (AL-170, A-170 series).