MULTI-DIVISIONAL HOLLOW FIBER, SPINNING NOZZLE HAVING SLIT THEREFOR AND MANUFACTURING METHOD THEREOF

摘要

The present invention relates to a multi-divisional hollow fiber, a spinning nozzle including a slit for forming a multi-divisional hollow fiber, and a method for preparing a multi-divisional hollow fiber using same. According to the multi-divisional hollow fiber of the present invention, a hollow inside a hollow fiber made of a thermoplastic polymeric resin is divided into two or more, and thus, a hollow section is not easily distorted or deformed by external force in spite of a high hollowness of 3-50%, thereby maintaining the lightness and voluminosity and realizing high rightness, high insulation (thermal insulation), high elasticity, and high durability, when compared with existing hollow fibers. Further, according to the present invention, a slit which is optimized in order to provide a multi-divisional hollow fiber is designed, and then used to produce the multi-divisional hollow fiber into long fibers, short fiber, or non-woven fabrics, through a high-rate or low-rate stretching process. Thus, the prepared multi-divisional hollow fiber is useful as fiber materials for industrial construction, such as an insulating material; fiber materials for living, such as bedding for warmth and cushion, sofa, and interior materials; and fiber materials for light and warm clothing, such as leisure and sports clothing; and fiber materials for industry for the purposes of lightness, warmth, insulation, and cushion, of interior and exterior.