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AssigneeKohjin Co., Ltd.
InventorsKeizou Yamaji, Natumi Satou, Eiji Morisaki
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This invention is concerned with a process for producing deodorizing cellulose fibers on which a considerable amount of copper hydroxide and/or zinc hydroxide is fixed highly strongly, which process is characterized in that cellulose fibers are allowed to contact with a colloidal solution of copper hydroxide and/or zinc hydroxide prepared by adding an alkaline substance to an aqueous solution of a water-soluble copper compound and/or a water-soluble zinc compound. Deodorizing fibers so obtained are capable of effectively removing malodorous gaseous substances, such as hydrogen sulfide, ammonia, methyl mercaptan, etc., and exhibit excellent deodorizing effects. In addition, the deodorizing fibers, although they can be an excellent deodorizing material as they are, are excellent in workability and hence can be used in the form of a shaped product, including, e.g., granules, sheets, etc. They can therefore be applied to various uses in the field of deordorization.
A process for producing deodorizing fibers, comprising adding an alkaline substance to an aqueous solution containing at least one water-soluble compound selected from the group consisting of copper compounds and zinc compounds so as to form a colloid comprising hydroxide of said at least one water-soluble compound by adjusting the pH of said aqueous solution such that, in cases wherein said water-soluble compound is copper, said pH is from 5.0 to 12.0, and, in cases wherein said water-soluble compound is zinc, said pH is from 6.2 to 12.0, and attaching said hydroxide of said at least one water-soluble compound to cellulose fibers.
A process for producing deodorizing fibers, comprising adding acid to an aqueous solution containing at least one water-soluble compound selected from the group consisting of copper compounds and zinc compounds to make the pH less than 3.0, and subsequently adding an alkaline substance to said aqueous solution to adjust the pH of said aqueous solution such that, in the case wherein said water-soluble compound is a copper compound, said pH is from 6.0 to 12.0, and, wherein said water-soluble compound is a zinc compound, said pH is from 8.0 to 12.0, thereby forming a colloid comprising hydroxide of said at least one water-soluble compound, and attaching said hydroxide of said water-soluble compound to cellulose fibers.
Deodorizing fibers comprising cellulose fibers on which at least one compound selected from the group consisting of copper hydroxide and zinc hydroxide if fixed through contact between a solution containing a colloid of said at least one compound and said cellulose.
Deodorizing materials comprising deodorizing fibers on which at least one compound selected from the group consisting of copper hydroxide and zinc hydroxide is fixed through contact between a colloid of said at least one compound and cellulose fibers.
Dependencies are inferred from the claim text.