To obtain a regenerated collagen fiber having a light color, an excellent sense of touch in wetting, allowing readily forming a fixed shape, firmly setting and retaining the shape.
This regenerated collagen fiber has a structure in which ≥50% of free amino group of regenerated collagen is modified with a 2-20C alkyl group of a main chain containing a hydroxy group or an alkoxy group at the B-position or γ-position and contains an aluminum compound in the fiber. In the regenerated collagen fiber, the alkyl group is preferably a compound represented by general formula (I) -CH2-CH(OX)-R [R is a substituent group represented by R1-, R2-O-CH2- or R2-COO-CH2-; R1 is a ≥2C hydrocarbon group or CH2Cl; R2 is a ≥4C hydrocarbon group; X is hydrogen or a hydrocarbon group].
UEDA MASAHIRO
KAWAMURA KOHEI
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