This standard specifies the method for determining the root number ratio of hollow fibers and non-hollow fibers of various cross-sectional shapes using the microprojector method. This standard applies to hollow fibers of various cross-sectional shapes and mixed samples of hollow fibers and non-hollow fibers.
SN/T 2640-2010 history
2010SN/T 2640-2010 Quantitative analysis of textiles containing hollow fibers.Percentage of number