Takemoto Yushi Kabushiki Kaisha

Takemoto Oil & Fat Co., Ltd.

Yohei Suzuki

Jun Ito

Keiichiro Oshima

Takuya Matsunaga

Disclosed is an inorganic fiber sizing agent that contains a resin, which includes a vinyl ester resin and an ionic polyester resin, and has a mass ratio of the vinyl ester resin to the ionic polyester resin of greater than 1.

Sizing agent for inorganic fibers and inorganic fibers

Disclosed is a carbon fiber precursor treatment agent that contains a specific (poly)oxyalkylene derivative and a smoothing agent. The smoothing agent contains at least one selected from the group consisting of an amino-modified silicone, a polyether-modified silicone, a dimethyl silicone, and an ester compound. Assuming that the sum of the content ratios of the (poly)oxyalkylene derivative and the smoothing agent in the carbon fiber precursor treatment agent is 100% by mass, the carbon fiber precursor treatment agent contains the (poly)oxyalkylene derivative at a ratio of 5% by mass or more and 80% by mass or less and the smoothing agent at a ratio of 20% by mass or more and 95% by mass or less.

Growing community of inventors

Gamagori, Japan

Yohei Suzuki