Topic of this invention designates the ideal fiber and that the nonwoven fabrics are developed as purpose in the nonwoven fabrics which consist of the olefin polymer, this invention the anionic type surface active agent of Acid configuration 0.1 - 30 weight sections being the fiber which consists of the olefin polymer constituent which is included vis-a-vis the olefin polymer 100 weight section, the anionic type surface active agent of aforementioned Acid configuration, the melting kneading being done in the fiber, is something which offers the fiber which becomes.本発明の課題は、オレフィン系重合体からなる不織布に好適な繊維及び不織布を開発することを目的とし、本発明は、オレフィン系重合体100重量部に対して、酸形態のアニオン系界面活性剤を0.1~30重量部含むオレフィン系重合体組成物からなる繊維であって、前記酸形態のアニオン系界面活性剤が、繊維に溶融混錬されてなる繊維を提供するものである。
