Patent ID: 7887672

Claim:
A method for extracting natural cellulosic fiber bundles from wheat straw, which comprises wax on its surface, the method comprising performing a detergent treatment on the wheat straw to remove at least a portion of the wax from the surface of the wheat straw, performing an alkali treatment on the detergent-treated wheat straw to partially delignify the wheat straw and performing an enzyme treatment on the detergent-treated wheat straw to depolymerize hemicellulose, break covalent links between lignin and carbohydrates, and decompose cellulose chains in the wheat straw, or a combination thereof thereby yielding the extracted natural cellulosic fiber bundles, wherein said extracted natural cellulosic fiber bundles have a length that is greater than that of individual cells and a fineness of at least about 1 denier and no greater than about 300 denier.