Disclosed are methods for the direct production of short fibers using microdecortication processes and the production of densified particles and short fiber products, sourced from hemp or other bast plants, hemp fiber products, methods for the production of hemp fiber-reinforced polymeric materials, and the polymeric materials resulting therefrom. An embodiment of the method for the production of densified hemp fiber products involves microdecortication with the utilization of particle size reduction equipment to cut all or a portion of hemp stalk, bast fiber, and hurd to produce short fibers and particles. Some embodiments make use of microdecortication to cut whole hemp stalk directly into short hemp fiber. Equipment with cutting action may provide for more adequate control of fiber size and aspect ratio while using the whole hemp stalk to produce short fibers, as opposed to the production of short hemp fibers by cutting long hemp fibers originating from decortication.

A plant stalk decorticator includes a pair of feed rollers arranged abutting one another along a substantially horizontal axis with a line of contact therebetween. A splitting wedge is positioned at least partially below the pair of feed rollers and aligned along a substantially vertical axis that is substantially centrally located in the line of contact between the pair of feed rollers, the splitting wedge is configured to split a plant stalk fed from the pair of feed rollers into two plant fiber bark sections. Symmetrical pairs of vertically stacked peeling rollers are positioned below the pair of feed rollers and laterally from either side of the substantially vertical axis. Each of the pairs of peeling rollers are configured to receive a respective one of the plant fiber bark sections from the splitting wedge and separate the plant fiber bark section from the respective other one of the plant fiber bark sections.

A method for preparing Lyocell fibers from sugarcane bagasse is provided, which includes: crushing sugarcane bagasse to 40-80 mesh to obtain sugarcane bagasse powder; putting the sugarcane bagasse powder into a first solution and obtaining pretreated sugarcane bagasse powder; adding the pretreated sugarcane bagasse powder into a second solution and obtaining sugarcane bagasse cellulose; the second solution includes 15-17.5 mol/L glacial acetic acid, 10-15 g/L sodium hypochlorite, and remaining water; adding the sugarcane bagasse cellulose into an NMMO aqueous solution with a mass fraction of 85-88%, stirring and dissolving in a reaction kettle under a vacuum condition at 90-110 C. for 3-5 hours to obtain a transparent spinning solution, where the sugarcane bagasse cellulose has a mass ration of 6-10%; sending the spinning solution into a spinning system for spinning. The process of the present disclosure is simpler, more environmentally friendly, and can reduce costs.

A method for preparing Lyocell fibers from sugarcane bagasse is provided, which includes: crushing sugarcane bagasse to 40-80 mesh to obtain sugarcane bagasse powder; putting the sugarcane bagasse powder into a first solution and obtaining pretreated sugarcane bagasse powder; adding the pretreated sugarcane bagasse powder into a second solution and obtaining sugarcane bagasse cellulose; the second solution includes 15-17.5 mol/L glacial acetic acid, 10-15 g/L sodium hypochlorite, and remaining water; adding the sugarcane bagasse cellulose into an NMMO aqueous solution with a mass fraction of 85-88%, stirring and dissolving in a reaction kettle under a vacuum condition at 90-110 C. for 3-5 hours to obtain a transparent spinning solution, where the sugarcane bagasse cellulose has a mass ration of 6-10%; sending the spinning solution into a spinning system for spinning. The process of the present disclosure is simpler, more environmentally friendly, and can reduce costs.