| 摘要 |
PURPOSE: To prevent thread breaks during a higher-order processing by reducing adhesion amount threads through inhibiting excessive adhesion of a sizing agent to fuzz set areas, etc., by blowing a compressed gas to carbon fiber filaments after applying the sizing agent to the carbon fiber filaments. CONSTITUTION: This method for applying a sizing agent to carbon fiber filaments is to immerse the running carbon fiber filaments 2 in a sizing solution having 0.5-10wt.% concentration and consisting of a urethane resin and an epoxy resin solution or dispersion in a sizing tank through a group of rollers 1 and uniformly apply 0.2-5wt.% sizing agent based on the carbon fiber by blowing compressed gas 5, in 10-48m/sec flow rate, jet from a hole of a compressed gas supplying pipe 4 located >=1cm apart from the running position of the filament 2. |
