| 摘要 |
<p>A sizing agent for a carbon fiber comprising a water-soluble thermoplastic resin and an amphoteric surface active agent in the range of mass ratio of 6/1 to 1/3; a method for sizing a carbon fiber which comprises treating the carbon fiber with a sizing fluid containing the sizing agent; a sized carbon fiber having the sizing agent adhered to the surface thereof; and a knitted or woven fabric using said carbon fiber as at least a part thereof. The above sizing agent has good solubility in water over a wide region of pH, and can impart, to a carbon fiber, sufficient bundling property for taking a chopped carbon fiber form, excellent processability and good tow dispersibility in water over a wide region of pH. Further, the above knitted or woven fabric has good affinity to water over a wide region of pH, and therefore, can be suitably used in an application wherein the fabric is immersed in an aqueous matrix and impregnated with the matrix.</p> |
