Method for making natural cellulosic fiber bundles from cellulosic sources
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United States of America Patent
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Feb 15, 2011
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app pub date -
Feb 16, 2007
filing date -
Jan 28, 2005
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Abstract
A method for extracting such natural cellulosic fiber bundles from natural cellulose sources selected from the group consisting of cornhusk, cornstalk, switchgrass leaves, switchgrass stems, rice straw, sorghum leaves, sorghum stems, soybean straw, wheat straw, cotton stems, barley straw, and combinations thereof, the method comprising performing an alkali treatment to partially delignify the cellulose source material and an enzyme treatment to depolymerize hemicellulose, break covalent links between lignin and carbohydrates, and decompose cellulose chains in the natural cellulosic source material, or a combination thereof thereby yielding extracted natural cellulosic fiber bundles having 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.
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