| abstract |
[PROBLEMS] To provide a biodegradable face cover made of a non-woven fabric that can be obtained by a spunbond method because of its good spinning and opening properties, and has excellent flexibility and heat-sealability, and has little shrinkage even after processing. provide. The biodegradable face cover can be composted after use. The face cover of the present invention comprises a composite fiber comprising a polylactic acid polymer having a melting point of 160 ° C. or higher and an aliphatic polyester polymer having a melting point of 50 ° C. or lower than the polylactic acid polymer. It consists of the nonwoven fabric used as a fiber, It is characterized by the above-mentioned. The aliphatic polyester polymer forms at least a part of the surface of the composite fiber, and comprises 1,4-butanediol and succinic acid as constituent components, a higher fatty acid, a higher fatty acid metal salt, and phenylphosphone. It contains 0.1 to 1% by mass of at least one selected from acid metal salts and amide waxes. [Selection figure] None |