Toyo Boseki Kabushiki Kaisha

Toyobo Co., Ltd.

Nippei Toyoma Corp.

Other

Tetsuo Kodama

Akihiro Nakayama

Noboru Katsumata

Takaharu Nishida

Katsumasa Takahashi

Shouichi Uemura

Kensho Miyata

Kazutomo Kinutani

Kensho Kuroda

Toyotaka Wada

Yusuke Shimizu

Naoki Mizuno

Shoichi Gyobu

Yoshimitsu Sakaguchi

Hidekazu Yoshida

Syunji Kurahara

Koichi Matsuda

Ken Takasugi

Hisashi Ubara

The present invention provides a polybenzazole article superior in light resistance, which contains a light-resisting agent that allows for a regular reflectance of the article of not more than 30% in not less than 30% of the wavelength region of from 450 nm to 700 nm and a production method thereof. The present invention provides a polybenzazole article having noticeably superior light resistance, which is preferable as industrial materials and fireman's garments, and a production method thereof.

Polybenzazole article and production method thereof

An oxygen-absorbing material including a transition metal compound and one or more thermoplastic resins, when used for a molded product such as container, exhibits excellent gas-barrier and oxygen-absorbing properties. The material absorbs oxygen from contents and blocks oxygen from entering so that the contents can be maintained in an oxygen-free state for a long period of time. An excellent oxygen-absorbing property is achieved by an amino group content of 20 mmol/kg or lower in at least one thermoplastic resin and by lowering the crystallinity of the thermoplastic resin.

Oxygen-absorbing material

A managing system for managing slurry, which is supplied to a wire saw. Slurry is prepared in a preparing tank and sent to the wire saw and used to cut workpieces. After usage for cutting workpieces, the slurry is sent to a separating apparatus from the wire saw. The separating apparatus separates impurities from the used slurry to recover a mixture of recyclable dispersing liquid and abrasive grains from the used slurry. The recovered mixture is returned to the preparing tank. The recovered mixture is mixed with fresh abrasive grains and dispersing liquid in the preparing tank to prepare slurry. The property (specific gravity and viscosity) of the slurry in the preparing tank is detected. The amount of fresh abrasive grains and dispersing liquid supplied to the preparing tank is adjusted in accordance with the detection results. Accordingly, slurry having properties that are optimal for the cutting of workpieces is prepared.

Slurry managing system and slurry managing method

A slurry managing system for a wire saw is disclosed. The wire saw includes a wire that has a plurality of wire lines extending in parallel to one another. The wire is supplied with slurry containing abrasive grains in dispersing liquid to cut a workpiece so as to simultaneously produce a multiplicity of wafers. A mixer device mixes the slurry prior to supplying of the slurry to the wire saw. A first supplying device supplies the grains to the mixer device. A second supplying device supplies the dispersing liquid to the mixer device. A first adjusting device adjusts the amount of the grains supplied to the mixer device from the first supplying device. A second adjusting device adjusts the amount of the liquid supplied to the mixer device from the second supplying device.

Slurry managing system and slurry managing method for wire saws

Growing community of inventors

Ohtsu, Japan

Tetsuo Kodama