| 摘要 |
PROBLEM TO BE SOLVED: To obtain a microbicidal activated carbon fiber excellent in sustainability and microbicidal properties, and effective for the use of a water cleaning device, etc., by stably dispersing very fine particles of metallic silver having <=1μm diameter into the inside of the fiber. SOLUTION: This microbicidal activated carbon fiber dispersed with very fine particles of metallic silver having <=1μm diameter in its inside is obtained by using a pitch containing silver as a raw material for spinning (B) obtained by adding a silver compound to a coal-based or a petroleum-based heavy oil (A), oxidizing, and then polymerizing. The method for producing the fiber is to add the silver compound to the heavy oil (A) having <=500 poise viscosity at 100 deg.C, oxidize (nitrate) and then polymerize the oil at 250-350 deg.C to form a pitch for spinning (B) containing <=1wt.% of silver and having 220-350 deg.C softening point, then form a pitch fiber, make an infusible fiber, and further activate the infusible fiber. A water cleaning device is obtained by using the microbicidal activated carbon fiber.
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