Thermoplastic resin fiber with dispersant attached

Abstract

To provide a thermoplastic resin fiber to which a dispersant is attached, which can effectively disperse carbon fibers. A thermoplastic resin fiber to which a dispersant containing a random copolymer (A) of glycidyl ether and an alkylene oxide is attached in an amount of 0.1 to 20% by mass based on a total mass of thermoplastic resin fibers to which a dispersant is not attached.

1 . A thermoplastic resin fiber to which a dispersant comprising a random copolymer (A) of glycidyl ether and an alkylene oxide is attached in an amount of 0.1 to 20% by mass based on a total mass of thermoplastic resin fibers to which a dispersant is not attached. 
     
     
         2 . The thermoplastic resin fiber according to  claim 1 , wherein the random copolymer (A) of glycidyl ether and an alkylene oxide is a random copolymer of phenyl glycidyl ether and an alkylene oxide. 
     
     
         3 . The thermoplastic resin fiber according to  claim 2 , wherein the random copolymer (A) of phenyl glycidyl ether and an alkylene oxide is a random copolymer of phenyl glycidyl ether and ethylene oxide, or a random copolymer of phenyl glycidyl ether, ethylene oxide and propylene oxide. 
     
     
         4 . The thermoplastic resin fiber according to  claim 1 , wherein the dispersant further comprises a polyether-based polyurethane resin (B). 
     
     
         5 . The thermoplastic resin fiber according to  claim 1 , wherein the thermoplastic resin fiber is one or more fibers selected from the group consisting of polyetherimide fibers, polyamide fibers, polyester fibers, polyolefin fibers, polyetheretherketone fibers and polycarbonate fibers. 
     
     
         6 . The thermoplastic resin fiber according to  claim 1 , wherein the thermoplastic resin fiber has one or more structures selected from the group consisting of a circular structure, an elliptical structure, a triangular structure, a cross structure, a core-sheath structure, a sea-island structure, a multi-pleat structure, a hollow structure and a side-by-side structure. 
     
     
         7 . The thermoplastic resin fiber according to  claim 1 , wherein the dispersant is attached in an amount of 0.5 to 10% by mass based on the total mass of the thermoplastic resin fibers to which a dispersant is not attached. 
     
     
         8 . (canceled) 
     
     
         9 . A slurry comprising thermoplastic resin fibers according to  claim 1 , carbon fibers and water. 
     
     
         10 . The slurry according to  claim 9 , comprising 40 to 900 parts by mass of the thermoplastic resin fibers based on 100 parts by mass of the carbon fibers. 
     
     
         11 . A nonwoven fabric obtained by papermaking and drying the slurry according to  claim 9 . 
     
     
         12 . A nonwoven fabric based on thermoplastic resin fibers according to  claim 1  and carbon fibers, wherein an amount of the dispersant in the nonwoven fabric is 0.01 to 1.0% by mass based on a total mass of thermoplastic resin fibers in the nonwoven fabric. 
     
     
         13 . The nonwoven fabric according to  claim 11 , wherein a number of carbon fiber bundles having a fiber bundle width of 0.1 mm or more on a surface is 2000 pieces/m 2  or less. 
     
     
         14 . A carbon fiber-reinforced composite molded body based on the nonwoven fabric according to  claim 11 . 
     
     
         15 . The carbon fiber-reinforced composite molded body according to  claim 14 , wherein a number of carbon fiber bundles having a fiber bundle width of 0.1 mm or more on a surface is 2000 pieces/m 2  or less. 
     
     
         16 . The carbon fiber-reinforced composite molded body according to  claim 14 , wherein the thermoplastic resin fiber acts as a matrix resin. 
     
     
         17 . A method for manufacturing a carbon fiber-reinforced composite molded body, the method comprising:
 papermaking and drying the slurry according to  claim 9 , and   heat press molding the obtained nonwoven fabric.