MULTI-LAYER HOLLOW FIBER MEMBRANE HAVING HIGH STRENGTH AND EXCELLENT PERMEABILITY AND PREPARING METHOD THEREOF

摘要

PURPOSE: A multi-layer hollow fiber membrane and a method thereof are provided to not generating a delamination phenomenon by an inner support layer and an external coating layer having a strong binding force and to have a high strength and an excellent permeability at a same time. CONSTITUTION: A multi-layer hollow fiber membrane has a 2-layered structure of a polymer support layer and a coating layer; or a 3-layered structure of the polymer support layer, a binder layer, and an outer-most coating layer. The coating layer comprises a binder when the hollow fiber membrane is the 2-layered structure. A method of manufacturing the multi-layer hollow fiber membrane comprises the following steps: a polymer support is molded and an outside coating layer is coated at a same time, by spraying a coating solution including a polymer solution and a binder through a respectably separated molding nozzle at a same time; and a manufactured hollow fiber membrane is obtained. [Reference numerals] (AA) Coating layer; (BB) Boundary between the coating layer and the support(Reason of adding a binder which minimizes delamination due to strong binding); (CC) Support