Core-sheath conjugate fiber and nonwoven fabric formed therefrom

Abstract

A core-sheath conjugate fiber is disclosed that exhibits excellent white opacity without using titanium oxide. The core-sheath conjugate fiber includes a core component containing a polyester resin; and a sheath component containing a polyolefin resin having a melting point that is lower than a melting point of the polyester resin by 20° C. or more, wherein either or both of the core component and the sheath component contain calcium carbonate in an amount of more than 1.0% by mass and 30.0% by mass or less based on 100% by mass of each component, the core component has a maximum peak temperature of crystal melting of lower than 255° C., as measured with a differential scanning calorimeter, and the fiber has an L* value of 91 or more and a b* value of 5.0 or less, which indicate a hue of the fiber.

Dependencies are inferred from the claim text.