Abstract: The paper introduces the properties of several kinds of bio-based fibers and their applications in nonwoven field. As marine bio-based fibers, alginate fiber and chitosan fiber have excellent physical and chemical properties, biological compatibility and anti-bacteria property, which are widely used for medical dressing, biological tissue engineering, etc.; polylactic acid fiber have good biological compatibility and biodegradability, which can be made into needle-punched and thermal-bonded materials to be used in filtration, decoration and agricultural fields.

Key words: bio-based nonwoven materials; alginate fiber; chitosan fiber; polylactic acid fiber