| 摘要 |
PURPOSE:To improve the coefficient of utilization of strength in a conveyor belt having a specific fabric core body, according to a method wherein a woof and a warp made of the yarn of an aromatic polyamide constructed by the specified upper, center and lower twisting three steps are arranged at straight- like position, being entwined by means of an entwining yarn to construct the core body. CONSTITUTION:A warp 1 consists of the yarn of an aromatic polyamide constructed by upper, center and lower twisting three steps. In this case, the angle across a center yarn 5 and the yarn axis of a lower yarn 4, or a center twisting angle alpha, is 10 to 30 degrees, and the angle across the axises of an upper yarn and the center yarn 5 is 10 to 20 degrees. The intertwisting number of the upper yarn is specified to two or three. The warp 1 and a woof 2 are arranged at substantially straight-like position, being entwined by means of an entwining yarn 3 to construct a core body. According to the above constitution, the core body having high coefficient of utilization of strength and high strength can be obtained. |
