Far infrared-emitting composition and far infrared-emitting fiber including the same

A far infrared (FIR)-emitting fiber, comprising a FIR-emitting composition, which includes:

• a first polymer component;
• and
• a silicon dioxide composite particle which is prepared by subjecting a tetraalkoxysilane and a compound represented by Formula (A) to hydrolysis and condensation polymerization,
• Y—Si(ORa)3 (A),
• wherein
• each Ra independently represents a C1-4 alkyl group or a C1-4 alkanoyl group;
• Y represents X-R1, wherein
• R1 represents a C1-5 alkylene group;
• and
• X represents
• wherein each R3 independently represents a non-substituted C2-8 linear alkyl or alkoxyl group, or a non-substituted C3-8 branched alkyl or alkoxyl group;
• Z represents a non-substituted phenyl group or a phenyl group substituted by at least one R3;
• and
• each of A and B independently represents —NR4R5, —OR6 or —SR7, in which R4 is a hydrogen atom, a non-substituted C1-22 linear alkyl group or a non-substituted C3-22 branched alkyl group;
• and each of R5 to R7 independently represents a non-substituted C1-22 linear alkyl group or a non-substituted C3-22 branched alkyl group;
• the FIR-emitting fiber further comprising a second polymer component,
• wherein based on a total weight of said second polymer component and said FIR-emitting composition, said silicon dioxide composite particle is present in an amount ranging from 0.5 wt % to 50.0 wt %.