A method is for manufacturing cellulose microfibers in which a problem of yellowing of cellulose microfibers to be obtained was solved, and cellulose microfibers. As to a method for manufacturing cellulose microfibers, cellulose fibers are added with an additive (A) consisting of at least one of a phosphorous acid and a metal phosphite and an additive (B) consisting of at least one of urea and a urea derivative, heated and washed, then fibrillated. Also, as to cellulose microfibers, the fiber width is 1 to 1000 nm, and a part of hydroxy groups of cellulose fibers is substituted with a functional group represented by a predetermined structural formula to introduce an ester of phosphorous acid.

A method is for manufacturing cellulose microfibers in which a problem of yellowing of cellulose microfibers to be obtained was solved, and cellulose microfibers. As to a method for manufacturing cellulose microfibers, cellulose fibers are added with an additive (A) consisting of at least one of a phosphorous acid and a metal phosphite and an additive (B) consisting of at least one of urea and a urea derivative, heated and washed, then fibrillated. Also, as to cellulose microfibers, the fiber width is 1 to 1000 nm, and a part of hydroxy groups of cellulose fibers is substituted with a functional group represented by a predetermined structural formula to introduce an ester of phosphorous acid.

A type of flame-retardant cellulosic fiber and a preparation method thereof are disclosed. The preparation method includes extruding the cellulosic solution through a spinneret, coagulating, stretching, and water-washing to obtain a water-washed filament, which is then treated with a flame-retardant solution, and then rinsed and dried to prepare the flame-retardant cellulosic fiber. The water-washing temperature is 90° C., the temperature of the flame-retardant solution during treatment is 60-90° C., and the rinsing temperature is 20-40° C. The flame retardant contains more than one of a group that forms a covalent bond with a hydroxy group of the cellulosic macromolecule, a group having the ability of self-crosslinking reaction, and a group that forms a hydrogen bond with a hydroxy group of the cellulosic macromolecule. The prepared flame-retardant cellulosic fiber is mainly composed of the cellulosic fiber matrix and the flame retardant dispersed in the matrix.

A type of flame-retardant cellulosic fiber and a preparation method thereof are disclosed. The preparation method includes extruding the cellulosic solution through a spinneret, coagulating, stretching, and water-washing to obtain a water-washed filament, which is then treated with a flame-retardant solution, and then rinsed and dried to prepare the flame-retardant cellulosic fiber. The water-washing temperature is ≤90° C., the temperature of the flame-retardant solution during treatment is 60-90° C., and the rinsing temperature is 20-40° C. The flame retardant contains more than one of a group that forms a covalent bond with a hydroxy group of the cellulosic macromolecule, a group having the ability of self-crosslinking reaction, and a group that forms a hydrogen bond with a hydroxy group of the cellulosic macromolecule. The prepared flame-retardant cellulosic fiber is mainly composed of the cellulosic fiber matrix and the flame retardant dispersed in the matrix.

A product having ultraviolet radiation protection and antimicrobial protection has a quantity of synthetic material, a quantity of zinc oxide particles with each particle having a surface, the quantity of zinc oxide particles in the range of 0.05 percent to 0.10 percent, and a quantity of a reactive group for modifying each surface of each zinc oxide particle, the quantity of the reactive group for incorporating the quantity of zinc oxide particles into the quantity of synthetic material prior to the quantity of synthetic material being formed into a fiber.

A product for incorporating ultraviolet radiation protection and antimicrobial protection into a synthetic polymer is disclosed which has a quantity of zinc oxide particles modified with a layer of a reactive group that forms a bond with a quantity of synthetic polymer chips having C—H bonds. A product for incorporating ultraviolet radiation protection and antimicrobial protection into a synthetic polymer prior to forming a synthetic material is also disclosed which has a quantity of synthetic polymer chips and a quantity of zinc oxide particles modified with a layer of a reactive group that forms a bond with the quantity of the synthetic polymer chips.

A method is for manufacturing cellulose microfibers in which a problem of yellowing of cellulose microfibers to be obtained was solved, and cellulose microfibers. As to a method for manufacturing cellulose microfibers, cellulose fibers are added with an additive (A) consisting of at least one of a phosphorous acid and a metal phosphite and an additive (B) consisting of at least one of urea and a urea derivative, heated and washed, then fibrillated. Also, as to cellulose microfibers, the fiber width is 1 to 1000 nm, and a part of hydroxy groups of cellulose fibers is substituted with a functional group represented by a predetermined structural formula to introduce an ester of phosphorous acid.

A method is for manufacturing cellulose microfibers in which a problem of yellowing of cellulose microfibers to be obtained was solved, and cellulose microfibers. As to a method for manufacturing cellulose microfibers, cellulose fibers are added with an additive (A) consisting of at least one of a phosphorous acid and a metal phosphite and an additive (B) consisting of at least one of urea and a urea derivative, heated and washed, then fibrillated. Also, as to cellulose microfibers, the fiber width is 1 to 1000 nm, and a part of hydroxy groups of cellulose fibers is substituted with a functional group represented by a predetermined structural formula to introduce an ester of phosphorous acid.

Disclosed are textile fibers, yarns, and fabrics having improved comfort and water and odor adsorption properties, and methods of manufacturing same. The improved textiles have an increased distribution of adsorbing particles distributed at the surface of the fibers and yarns to enable greater overall surface area for adsorbance.

The present invention provides agents having efficacy against viruses, allergens, bacteria and odorants, materials including such agents, and methods for producing the agents. An agent according to an embodiment of the present invention includes titanium dioxide particles having low photocatalytic activity, and metal ions of at least one metal selected from gold, silver, platinum and copper that are adsorbed to the surface of the titanium dioxide particles. The agent may further include hydroxyapatite particles, and the metal ions may be adsorbed also to the surface of the hydroxyapatite. The metal ions may be at least partially present in the form of at least one of an oxide of the metal, a hydroxide of the metal, and the elemental metal.