Mitsubishi Chemical Corporation

Nippon Kasei Chemical Company Limited

Kimmon Manufacturing Co., Ltd. and Mitsubishi Chemical Corporation

Masaru Shimoyama

Yoshio Katsuro

Akira Utsunomiya

Hiroshi Ota

Yutaka Mori

Hiroshi Maeda

Hajime Onoda

Hozumi Endo

Kazumi Kimura

Shoji Oishi

Takahiro Endo

Yuko Tsuruta

A humidity-conditioning sheetexcellent in reversibility and responsiveness of a moisture adsorbing/desorbing ability of rapidly adsorbing moisture at high ambient humidity and conversely rapidly desorbing adsorbed moisture at low ambient humidity includes a sheet-shaped humidity-conditioning layerformed by bonding together, with a thermoplastic resin powder, humidity-conditioning particleswhich reversibly adsorb and desorb water vapor. The void ratio of the humidity-conditioning layeris 5% or more. Since a ratio of voidsformed between the humidity-conditioning particlesis high, the voidsbetween the humidity-conditioning particlescan be used as water retention spaces for moisture adsorption and desorption, thereby achieving the high reversible moisture adsorbing/desorbing ability and excellent moisture adsorption/desorption responsiveness with the aid of not only the moisture adsorbing/desorbing ability inherent in the humidity-conditioning particles but also the moisture adsorbing/desorbing ability of the voids between the humidity-conditioning particles.

Humidity-conditioning sheet

Processes for producing synthetic quartz powder and producing shaped

Silica gel, synthetic quartz glass powder, quartz glass shaped product

Synthetic quartz glass powder is produced by (a) hydrolyzing an alkoxysilane to form a gel, (b) finely dividing the gel and then drying, or drying the gel and then finely dividing, and (c) calcining the obtained powder, the powder being maintained under an atmosphere with an oxygen concentration of not less than 30 vol % during at least a part of the calcining period at a temperature of not lower than 1,000.degree. C.

Process for producing synthetic quartz glass powder

Growing community of inventors

Kitakyushu, Japan

Masaru Shimoyama