Toho Beslon Co., Ltd.

Toho Belson Co., Ltd.

The Japan Tobacco Salt Public Corporation

Kazuo Izumi

Minoru Hirai

Kenji Shimazaki

Shigeru Ikegami

Hiroyasu Ogawa

Kenzi Shimazaki

Kazuo Maeda

Yuriko Anzai

Kenji Niijima

Kenji Seki

Katsuichi Noguchi

Yoshihumi Kawakatsu

A filter composed of a mesh structure substrate having deposited thereon and therein activated carbon fiber treated with an alkali and having a length within the range of from 5 to 1,000.mu., wherein the mesh structure substrate has an average cell diameter 3 to 100 times the length of the activated carbon fiber, wherein the activated carbon fiber is adhered to the substrate by a binder, and wherein the activated carbon fiber is deposited on and in the substrate by impregnating the substrate with a dispersion obtained by dispersing activated carbon fiber in a dispersion or solution of a binder, and drying methods for forming and using the same are also disclosed.

Filter

An activated carbon fiber spun yarn having excellent workability and adsorptive property is disclosed. The activated carbon fiber spun yarn comprising activated carbon fibers having a specific surface area of 500 to 1,500 m.sup.2 /g, a ductility of at least 0.5%, and a tensile strength of at least 10 kg/mm.sup.2 and derived from acrylonitrile-based fibers. The spun yarn has a twist coefficient of 30 to 60.

Activated carbon fiber spun yarn

Fibrous activated carbon having a pH not more than 5 which is suitable for recovering halogenated hydrocarbon solvents is disclosed. The fibrous activated carbon is obtained by acid treating raw fibrous activated carbon.

Fibrous activated carbon and process of producing it

Acrylonitrile fibers suitable for production of preoxidized fibers, fibrous active carbon and carbon fibers, which have thereon a water-soluble basic aluminum salt of the formula:

Acrylonitrile fibers, a process for producing acrylonitrile fibers, as

A method for manufacturing activated carbon fibers is disclosed. The method is comprised of the steps of:

Method for manufacture of activated carbon fiber

A fibrous activated carbon with a metal chelate compound supported thereon which is suitable for removal of toxic substances in gas. This activated carbon is obtained by attaching a solution or dispersion of the metal chelate compound onto the fibrous activated carbon followed by drying. Contacting the activated carbon with a toxic substance-containing gas provides very efficient removal of the toxic substance from the gas.

Fibrous activated carbon with metal chelate compound supported thereon,

A fibrous activated carbon having high adsorptivity and excellent mechanical properties is produced by preoxidizing an acrylonitrile-based fiber containing a specific amount of an iron compound at a specific initial heat-treatment temperature and then activating.

Process for the production of fibrous activated carbon

A tobacco smoke filter capable of selectively removing irritating materials and unpleasant bitter components from tobacco smoke and containing as a filter element nitrogen-containing activated carbon fibers produced by oxidizing acrylonitrile polymer fibers and then activating the oxidized fibers.

Growing community of inventors

Shizuoka, Japan

Kazuo Izumi