| 摘要 |
PURPOSE: A biodegradable long-fiber nonwoven and a manufacturing method of the same are provided to have an environmental affinity, be degraded by a microorganism and be excellent in mechanical strength and flexibility for practical usage. CONSTITUTION: The biodegradable long-fiber nonwoven consists of long-fibers of poly-lactic group polymer. The poly-lactic group polymer is selected from a group consisting of poly D-lactic acid having at least melting point of 100deg.C, copolymer of poly L-lactic acid and D-lactic acid, copolymer of D-lactic acid and hydroxycarboxylic acid, L-lactic acid and hydroxycarboxylic acid, copolymer of D-lactic acid, L-lactic acid and hydroxycarboxylic acid, and blend thereof. The long-fiber of poly lactic group polymer has a double reflection factor of 10x1C3-25x10-3, a crystallinity of 12-30wt% and axial crystal size of at most 80 angstrom. |
