3. Density gradient method: The fiber is identified acc […]
3. Density gradient method: The fiber is identified according to the characteristics of various fibers having different densities.
(1), the density gradient solution is formulated, generally using a xylene carbon tetrachloride system.
(2), calibration density gradient tube, commonly used is the precision ball method.
(3), measurement and calculation, the fiber to be tested is deoiled, dried, defoamed and pretreated, and after the ball is put into balance, the fiber density is measured according to the fiber suspension position.