Abstract: A modified fiber and a method for producing the same. The modified fiber is obtained by modifying a fiber material containing at least one of a cellulosic fiber and an animal fiber. In the modified fiber, a film of a silicone elastomer is attached to at least a portion of a surface of the fiber material, the silicone elastomer contains a polyoxyethylene alkyl ether having 12 to 15 carbon atoms as a main component and has a siloxane skeleton, and the surface has a surface tension of 30 to 70 mN/m.

Abstract: A functional fiber which, over long periods of time, can maintain excellent heat retention and deodorant antibacterial properties without reducing moisture absorption and desorption, and which moreover can be obtained efficiently, and a manufacturing method of said fiber are provided. This functional fiber has a fiber material imparted with an infrared radiation function and a deodorant antibacterial function. A silicone elastomer film that contains aluminum oxide particles with an average particle diameter of 1-10 ?m is fixed to at least part of the surface of the fiber material. The silicone elastomer film has polyoxyethylene alkyl ethers of 12-15 carbons as the main component, and has a siloxane backbone.

Abstract: A hydrophobic fiber is provided which, obtained by modifying a natural fiber-containing fiber material without the use of fluorine compounds, has improved quick-dry properties, durability, wash-and-wear properties and antifouling properties while sufficiently maintaining the moisture absorption and desorption of the natural fibers; a manufacturing method of said fiber is also provided. By fixing a silicone elastomer film to at least part of the surface of a fiber material that contains cellulose fibers and/or animal fibers, the fiber is made into a hydrophobic fiber with a surface tension of less than 72 mN/m. The silicone elastomer film comprises methylhydrogen polysiloxane cross-linked with zinc stearate as the crosslinking agent.

Abstract: A modified fiber and a method for producing the same. The modified fiber is obtained by modifying a fiber material containing at least one of a cellulosic fiber and an animal fiber. In the modified fiber, a film of a silicone elastomer is attached to at least a portion of a surface of the fiber material, the silicone elastomer contains a polyoxyethylene alkyl ether having 12 to 15 carbon atoms as a main component and has a siloxane skeleton, and the surface has a surface tension of 30 to 70 mN/m.