| 摘要 |
PURPOSE:To provide a treatment method to prevent frays of polyamide single fiber bared on a belt end during preparation when applied as a reinforcing yarn of a power transmission belt, to improve adhesion of an aromatic polyamide fiber to a matrix rubber and not to reduce fatigue resistance. CONSTITUTION:Aromatic polyamide yarn is treated with an agent comprising a liquid rubber having hydroxyl groups on both ends, epoxy groups in a molecule and 500-10,000 molecular weight and a liquid rubber having isocyanate groups on both ends and 500-10,000 molecular weight, heat treated at 100-260 deg.C for 30-210 seconds and twisted in a range of 1<=K<=5 (K=TXD<1/2>/2874, K; twist coefficient, D; denier), then an adhesive containing RFL (Resorcin.formalin.latex) is applied to the treated fiber. |
