Cellulose fiber having improved biostability and the...

Details Cellulose fiber having improved biostability and the... Cellulose fiber having improved biostability and the...

2007-11-27

2007-11-27

Hug, Eric (Department: 1731)

Paper making and fiber liberation

Processes and products

Non-fiber additive

C162S010000, C162S072000, C162S079000, C162S164600, C162S181200, C162S182000, C428S379000, C428S389000, C424S413000

Reexamination Certificate

active

11192742

ABSTRACT:
A cellulose fiber having extended biostability and the method of its manufacture are described. While prior treatments of cellulose with biotoxic metal compounds have given improved resistance to decay, these treatments have not been entirely satisfactory where the fiber had to be refined before use. Refining energy was very high and fiber length loss was substantial. Treatment of cellulose fiber with dideyldimethylammonium chloride (DDAC) or bromide (DDAB), these materials in combination with low levels of copper, or low levels of copper alone, has given a product with very good biostability without a major increase in refining energy or loss of fiber length. The treated fiber is particularly advantageous as a reinforcing component for cement board products.

REFERENCES:
patent: 5049383 (1991-09-01), Huth et al.
patent: 5462589 (1995-10-01), Nicholas et al.
patent: 5730907 (1998-03-01), Schultz et al.
patent: 5856248 (1999-01-01), Weinberg
patent: 6086998 (2000-07-01), Wihsmann et al.
patent: 1 134 564 (1982-02-01), None
patent: 1604910 (1981-12-01), None

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