The present disclosure relates to a natural fiber plastic composite precursor material comprising 80-95% (w/w) cellulosic fibers having an average fiber length less than 1 mm, 3-7% (w/w) coupling agent, 0-7% (w/w) thermoplastic polymer, and 0-1% (w/w) lubricant and/or wax, wherein the material is in form of pellets having a bulk density in the range of 300-700 g/l, and to a method for preparing thereof. The present disclosure also relates to a method for preparing a natural fiber plastic composite product.

Wood-based composites, compositions for use in wood-based composites, and associated systems and methods are provided herein. Certain compositions include a mixture of alpha olefins and esters and demonstrate unique water repellant properties. The compositions may be incorporated in wood-based composites in place of traditional petroleum-based slack waxes.

A method of manufacturing crop straw fiber board includes the following steps: (1) mashing and choosing the straws with the length of 10-40 mm and the moisture content of 20%-30% as raw materials; (2) sending the raw materials into a digester (5) to digest and soften the straws; (3) sending the raw materials into a defiberator (7) and grinding to obtain straw fibers; (4) sending the straw fibers into a liquid applying system to mix with the adhesive, then drying with hot wind; (5) paving the straw fibers, then pre-pressing to obtain a plate blank with the thickness of 30-180 mm; (6) sending the plate blank into No. 1 hot press (8) to dehydrate; (7) sending the plate blank to No. 2 hot press (9) to adhere the plate blank; (8) sending the plate blank to No. 3 cold press (10) to shape the plate blank; (9) trimming and sanding the plate blank to obtain the fiberboard. Any crop straws could be used for the method.