Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1402905 | European Polymer Journal | 2009 | 6 Pages |
Abstract
Poly(l-lactic acid) (PLLA) nonwoven fabric was obtained by using a carbon dioxide laser-thinning method. The obtained PLLA nonwoven fabric was made of endless microfibers with a uniform diameter without droplets. The fiber diameter can be varied by controlling an airflow rate supplied to the air jet, a supplying speed of an original fiber into a laser-irradiating point, and laser intensity. When the microfiber prepared by irradiating the laser operated at a laser intensity of 66 W cmâ2 to the original fiber supplied at Ss = 0.1 m minâ1 was dragged at an airflow rate of 30 L minâ1, the thinnest microfiber with an average diameter of 3.4 μm was obtained. The obtained microfiber had a degree of crystallinity of 45%, and the degree of crystal orientation of 84%. The existence of highly oriented crystallites suggests that a flow-induced crystallization occurred during the laser-thinning.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Akihiro Suzuki, Yu Akaoka,