The invention belongs to the technical field of melt spinning, and specifically discloses a continuous fine-denier phenolic fiber and a preparation method thereof. PCTG is added to improve the spinnability of phenolic resin. The mixed material of phenolic resin and PCTG is melted by a twin-screw extruder, stabilized and pressurized by tandem metering pumps, and then delivered to the spinning assembly. The extruded nascent fiber is slowly cooled and wound to ensure fiber stability and continuous production. The whole roll of phenolic fiber is placed in curing liquid for crosslinking reaction, and the heating procedure of curing reaction is precisely controlled. On the premise of guaranteeing fiber performance, the crosslinking time is greatly shortened and production efficiency is significantly improved. The process supports continuous industrial production. The prepared phenolic fiber has high strength with a fineness of 6μm～10μm and high carbon residue rate after high-temperature treatment, which expands its application scope.
Area Code: CN
Application Number: CN202411636967.9
