Kuraray Co., Ltd.

Toru Asada

Hiroyuki Kawai

Daisuke Koda

Shuhei Yorimitsu

Shinichi Takemoto

Eiichi Ishida

Reinforcing fibers containing hydrophilic fibers and an adhesive component, wherein at least a part of the surfaces of the hydrophilic fibers have the adhesive component, the adhesive component contains a modified conjugated diene rubber having a hydrogen-bonding functional group in a part of the conjugated diene rubber, and the number of the hydrogen-bonding functional groups in the modified conjugated diene rubber is 2 to 150 per molecule on average; a method for producing the reinforcing fibers; and a molded article using the reinforcing fibers.

Reinforcing fibers and production method therefor, and molded article using same

To provide surface-modified fibers and reinforcing fibers that are capable of enhancing the adhesiveness to rubber, without the use of resorcinol and formaldehyde, and a molded article using the same. Surface-modified fibers include fibers, and a surface-modifying layer covering at least a part of a surface of the fibers, and have a solid surface zeta potential on a surface of the surface-modifying layer of −20.0 to 30.0 mV.

Surface-modified fibers, reinforcing fibers, and molded article using same

Provided are reinforcing fibers using an adhesive component not containing resorcinol and formaldehyde, which are excellent in adhesiveness to rubber and which can be efficiently produced while preventing contamination of production facilities, and a method for producing them, as well as a molded article using them. The reinforcing fibers have an adhesive component that contains a conjugated diene rubber and an oil, in at least a part of the surfaces thereof, wherein the vapor pressure at 20° C. of the oil is 10 Pa or less.

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Okayama, Japan

Toru Asada