Abstract: The process of high temperature and steam explosion united degumming of hemp fibers was
researched , and the process conditions on the fiber properties and composition separating effect of the fibers
were analyzed. SEM and FTIR were used to characterize the morphology and chemical composition of the
degummed fibers. The results showed that the percentage of cellulose increased significantly while that of
hemicellulose and lignin had a mass loss of 81152 % and 86168 % , respectively. Furthermore , it was found
that different conditions such as temperature , dosage of alkali , pretreatment , pressure and temperature of
steam , pressure holding time , steaming times and so on were main factors influencing the separation of the
fibers. And high temperature steaming and pre2submerging helped the swell of hemp fibers so that the required
conditions of explosion treatment could be lowered accordingly