| 摘要 |
PURPOSE:To prevent tensile power of a belt from declining at high temperature and humidity by collecting a plurality of strands made of primarily twisted carbon fiber strands for final twisting with final twist coefficient of 2.0-4.0 so as to form an anti-tension body. CONSTITUTION:Carbon fiber strands with total denier number of 900-2,000D are primary twisted in either S twist or Z twist to be a strand, and an anti- tension body 4 is formed by the cord obtained by final twisting of 3-6 collected strands with final twist coefficient of 2.0-4.0 in the opposite direction to primary twisting. The final twist coefficient is calculated generally by T.F=D<1/2>XT/28.7. (provided, D=total denier number of cord T=twisting frequency per centimeter) |
