Flax fiber exists in the phloem tissue of hemp stem. After retting and degumming, part of the gum is removed, so that the adhesive fiber bundle is partially loose, and then it is processed into "beating flax", which is a process fiber composed of 10~20 single fibers.

Compared with glass fiber and carbon fiber, flax fiber is soft. Through proper degumming treatment, reasonable carding process, and needle-punching processing method, it can produce non-woven fabric reinforced fiber felt with quantitative and bulkiness meeting the requirements. At the same time, the fiber damage is small, and the thickening effect is good. As a reinforcing material, it has the advantages of short production process, no weaving, and low processing cost, which is conducive to energy conservation, And environmental protection.