Functional-agent-containing fiber and method for manufacturing same

A method for producing functional agent-containing fibers comprising a functional agent,

• the method comprising:
• irradiating fibers impregnated with a fiber treatment agent (A) comprising silicone with an electron beam so as to fix the silicone to the fibers;
• and
• impregnating the fibers to which the silicone has been fixed with a fiber treatment agent (B) comprising a functional agent,
• wherein the silicone comprises an acrylic-modified organopolysiloxane having two or more acrylic groups per molecule,
• the functional agent is supported by the silicone fixed to the fibers by structural entanglement or hydrophobic interaction,
• the acrylic-modified organopolysiloxane having two or more acrylic groups per molecule contains a unit represented by the following general formula (1) in the molecule:
• wherein R1 represents a same or different unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms, R2 represents a hydrogen atom, m is an integer of 1 to 8, and a and b are positive numbers that satisfy a+b≤3, and
• the acrylic-modified organopolysiloxane has a viscosity of 50 to 5000 mPa·s at 25° C.

A method for producing functional agent-containing fibers comprising a functional agent,

• the method comprising:
• impregnating fibers with a fiber treatment agent (C) comprising silicone and a functional agent;
• and
• irradiating the fibers impregnated with the fiber treatment agent (C) with an electron beam so as to fix the silicone to the fibers,
• wherein the silicone comprises an acrylic-modified organopolysiloxane having two or more acrylic groups per molecule,
• the functional agent is supported by the silicone fixed to the fibers by structural entanglement or hydrophobic interaction,
• the acrylic-modified organopolysiloxane having two or more acrylic groups per molecule contains a unit represented by the following general formula (1) in the molecule:
• wherein R1 represents a same or different unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms, R2 represents a hydrogen atom, m is an integer of 1 to 8, and a and b are positive numbers that satisfy a+b≤3, and
• the acrylic-modified organopolysiloxane has a viscosity of 50 to 5000 mPa·s at 25° C.