Preparation of poly(ethylene terephthalate)nonwoven fabric from endless microfibers obtained by CO2 laser-thinning method

摘要

Poly(ethylene terephthalate)(PET)nonwoven fabric was prepared from microfibers obtained by using a carbon dioxide laser-thinning method.The PET nonwoven fabric obtained was made of the endless mircofibers with a uniform diameter without droplets.The fiber diameter can be varied by controlling airflow rate into the air jet and supplying speed of an original fiber into a laser-irradiating point.The fiber diameter decreased,and its birefringence increased as the airflow rate increased and the supplying speed decreased.When the microfiber prepared by irradiating the laser operated at a power density of 4.8 Wcm~(-2)to the original fiber supplied at S_s=0.15 m min~(-1)was dragged at an airflow rate of 30 L min~(-1),the thinnest microfiber with a diameter of 3.6 urn was obtained.