High softness, high durability batch tissue incorporating high lignin eucalyptus fiber
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United States of America Patent
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Oct 25, 2016
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app pub date -
Jan 11, 2016
filing date -
Jul 28, 2011
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Abstract
A cellulosic tissue includes cellulosic fibers that include at least one of (a) chemically pulped fibers and (b) mechanically pulped fibers. The cellulosic fibers include (i) from about 10% to about 50% by weight eucalyptus fibers having a lignin content of at least about 20% by weight, and (ii) a percentage by weight of regenerated cellulosic microfibers. The cellulosic fibers further include virgin chemically pulped fibers, recycle fiber in an amount of up to 50%. The eucalyptus fiber has been prepared from eucalyptus chips by alkaline peroxide mechanical pulping, exhibiting an ISO brightness of at least 0.82×(% VCP)+0.795×(% RF)0.98+0.84×(% APMP), in which % VCP is the percentage of virgin chemical pulp in the sheet, % RF, the percentage of recycle fiber, and % alkaline peroxide mechanical pulping (APMP), the percentage of APMP eucalyptus.
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