CONJUGATE FIBER, PHENOL RESIN-BASED ULTRAFINE FIBER, PHENOL RESIN-BASED ULTRAFINE CARBON FIBER, PHENOL RESIN-BASED ULTRAFINE ACTIVE CARBON FIBER AND METHOD FOR PRODUCING THEM

摘要

PROBLEM TO BE SOLVED: To provide a phenol resin-based ultrafine fiber having the same characteristics such as heat resistance, flame retardancy, chemical resistance and the like as a conventional phenol resin-based fiber, and further having extremely ultrafine fiber diameter compared to that of the conventional one; to provide a phenol resin-based ultrafine carbon fiber and a phenol resin-based ultrafine active carbon fiber obtained by carbonizing the fiber or further activating the fiber after the carbonization; and to provide a method for producing them.;SOLUTION: The conjugate fiber comprising polystyrene resins as the sea component and a phenol resin as the island component is obtained by thermally melting and mixing the phenol resin with the polystyrene resins, forming the obtained compounded resin into a fiber by a melt-spinning method. The phenol resin-based ultrafine fiber is obtained by selectively dissolving and removing only the polystyrene resins of the second component in the conjugate fiber by using a solvent. The phenol resin-based ultrafine carbon fiber and the phenol resin-based ultrafine activated carbon fiber are obtained by carbonizing and thereafter activating the conjugate fiber. The method for producing them is also provided.;COPYRIGHT: (C)2005,JPO&NCIPI