Fiber cement composite materials using bleached cellulose fibers
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United States of America Patent
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May 17, 2011
Grant Date -
Sep 2, 2004
app pub date -
Jan 7, 2004
filing date -
Jan 9, 2003
priority date (Note) -
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Abstract
A fiber cement composite material that incorporates a blend of bleached and unbleached cellulose fibers as a partial or complete substitute for premium grade cellulose pulp is provided. Bleached standard grade cellulose fibers are used in conjunction with unbleached, standard grade cellulose fibers to provide a fiber cement composite product having substantially equal or even superior flexibility and strength as an equivalent fiber cement composite material reinforced by premium grade, unbleached cellulose fibers. A synergistic combination of bleached and unbleached standard grade cellulose fibers to produce a composite material with the desired properties previously achievable only through the use of premium grade cellulose pulp.
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