| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a carbon fiber base material that has small variation in oxidation status by surface treatment inside and outside the base material, and a method for producing a carbon fiber base material. <P>SOLUTION: The carbon fiber base material comprises bent carbon fibers oriented in a planar direction and a thickness direction, and has a thickness of 2.00 mm to 25.00 mm. When assuming that the sum of the ratio of COO group and C-O group in a C1s peak of a surface of the base material determined by ESCA is (A), and that the sum of the ratio of COO group and C-O group in the C1s peak of any surface of the inside of the base material determined by ESCA is (B), uniformity of inside and outside surfaces determined by the following equation falls within the range of 0.80 to 1.00: the uniformity of inside and outside surfaces of the base material=(B)/(A). <P>COPYRIGHT: (C)2012,JPO&INPIT |
