Effect of refined processing on physicochemical properties of hemp fibers

Since hemp fiber has such problems as high content of pectin,excessive rigidity and poor spinnability,the refined processing was carried out step by step.The physicochemical properties of the fiber after each step of processing were tested and analyzed.The damage of hemp fiber caused by degumming was minimized and the hemp fiber became finner,cleaner and softer,and the spinnability was improved.The results indicated that the removal of non-cellulose substances such as pectin and lignin is above 93% after refined processing,the splitting degree is above 3 000 Nm,the longitudinal surface of the fibers is clean and smooth,the breaking strength is(11.02 cN/tex,) the bending rigidity is(0.61)×(10~(-7) cN·cm~2),and the crystallinity is(81.57%.) The hemp fiber subjected to refined processing may be suitable for spinning on the efficient cotton equipment.