English 日本語
Techno-Gateway Co. Ltd. in English
Gateway to the Future with Technology

Toko Perlite

No.1 share of Diatomite Filter aids in Japan!

Toko Perlite

Toko Perlite Industry Co., Ltd. was established in 1965 to manufacture perlite for Showa Chemical Industry, and is home today to the Topco brand of perlite filter aids.

When heated, moisture trapped inside natural perlite vaporizes and escapes, causing the perlite to expand into a popcorn-like structure, which is then sorted and ground into a powder -like form that is used for the manufacture of filter aids. Toko Perlite Industry products come in a wide range of densities, from 0.04 to 0.3 g/cm3^ depending upon the application, and demonstrate absorption and insulation properties combined with other stable physiochemical characteristics that make it suitable for use not only in filter aids but also filler for construction materials, soil conditioners, hand cleansers, filler, and heat insulation.

Toko Perlite Industry was certified ISO9001:2000 in 2000 as part of our efforts to ensure consistent quality for our customers.

Topco Perlite products

Perlite is a colcanic glass mineral formed from the lava of an active volcano. Topco products are made by crushing perlite to an appropriate size, then quickly heating it to a temperature range of 800 – 1200 degree C, which causes with a volume as much as 2otimes its initial size.

Expanded perlite has a multicellular structure , low density, yet demonstrates excellent moisture – absorbency and thermal insulation properties combined with both physical and chemical stability.

For these reasons, it is well used in a number of industries and is suitable for use as a bulking agent in certain building material, insulation material, absorbing agent, and in horticultural application as a soil conditioner.

Perlite, once expanded, can also be milled and sized to produce perlite filter aids, which we sell under the Topco brand.

We mine perlite ore in Akita and Yamagata, and process the ore at our Tochigi.


Techno gateway Co. Ltd. is Distributor of Showa chemical industry co., ltd.