摘要:
A synthetic quartz glass powder obtained by sol-gel method, wherein the number of black spot particles is at most 5 particles per 50 g, provides a high quality quartz glass shaped product with low bubble content when fused.
摘要:
A humidity-conditioning sheet 10 excellent 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 layer 7 formed by bonding together, with a thermoplastic resin powder 4, humidity-conditioning particles 3 which reversibly adsorb and desorb water vapor. The void ratio of the humidity-conditioning layer 7 is 5% or more. Since a ratio of voids 8 formed between the humidity-conditioning particles 3 is high, the voids 8 between the humidity-conditioning particles 3 can 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.
摘要:
A coating composition excellent in coating characteristics and/or appearance of the coated surface is provided. The composition can provide a resin forming product excellent in dew condensation resistance, moisture conditioning effect, anti-fouling effect, cooling effect (moisture-releasing cooling effect, moisture-releasing endothermic properties), and/or endurance.The coating composition includes at least an inorganic porous material, a binder resin, and a solvent, wherein (1) the inorganic porous material contains at least one silicon compound; (2) the binder resin has (a) a solid hydroxyl value in the range of 5 mgKOH/g to 80 mgKOH/g and (b) a glass transition temperature (Tg) in the range of −5° C. to 40° C.; and (3) the solvent contains at least one organic solvent.
摘要:
A humidity-conditioning sheet 10 excellent 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 layer 7 formed by bonding together, with a thermoplastic resin powder 4, humidity-conditioning particles 3 which reversibly adsorb and desorb water vapor. The void ratio of the humidity-conditioning layer 7 is 5% or more. Since a ratio of voids 8 formed between the humidity-conditioning particles 3 is high, the voids 8 between the humidity-conditioning particles 3 can 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.
摘要:
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.
摘要:
A process for producing a synthetic quartz powder, which comprises a step of heat-treating a silica gel powder while permitting it to flow in a rotary kiln.