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纤维状物品,尤其象碳纤维类的多丝的纱束,其真实体积的直接测量较难,因此确定其比重时,不能采用象对规则形体的称重、量尺寸求体积、计算其比重的方法。纤维的比重测定,一般采用悬浮法,即配制各种比重的溶液,然后将纤维分别浸入,观察纤维的悬浮情况,使纤维正好开始上浮的溶液的比重即确定为纤维的比重。目前,测定碳纤维的比重常用此法。
Fibrous goods, especially multifilament yarns such as carbon fiber, are difficult to measure directly in real volume. Therefore, when determining their specific gravity, we can not adopt the method of weighing the regular body, measuring the volume and calculating the specific gravity . Determination of the proportion of fibers, the general suspension method, that is, the preparation of a variety of specific gravity of the solution, then the fibers were immersed in the observation of fiber suspension, so that the fiber just started floating the proportion of the solution that is determined as the proportion of fiber. At present, the determination of the proportion of carbon fiber commonly used this method.