| abstract |
[PROBLEMS] To provide a transmission belt having both heat resistance, water resistance, and oil resistance, in which the coating layer maintains the initial adhesive strength even when it is bent for a long time, and a glass fiber for rubber reinforcement that provides the same, especially transmission excellent in oil resistance. Providing a belt and rubber reinforcing glass fiber to give it. A glass fiber coating first liquid containing a phenols-formaldehyde condensate and a rubber latex is coated on a strand formed by bundling a plurality of glass fiber filaments, and a primary coating layer is provided. A glass fiber for reinforcing rubber, in which a second liquid for glass fiber coating having a different composition is applied and coated on the primary coating layer to provide a further secondary coating layer, the secondary coating layer being a hydrogenated nitrile rubber (A) A glass fiber for reinforcing rubber, comprising: a carboxylated acrylonitrile-butadiene copolymer (B); and a chlorosulfonated polyethylene (C). [Selection] Figure 3 |