METHOD FOR INCREASING THE ADVANTAGES OF STRENGTH AIDS IN THE PRODUCTION OF PAPER AND PAPERBOARD
First Claim
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1. A method for manufacturing paper, paperboard or cardboard comprising the steps of(a) pulping an aqueous cellulosic material containing a starch;
- (b) preventing at least a portion of the starch from being microbially degraded by treating the aqueous cellulosic material containing the starch with one or more biocides, which are at least partially added to the cellulosic material in the thick stock area, where the cellulosic material has a stock consistency of at least 2.0%; and
(h) adding a dry and/or wet strength polymer to the cellulosic material.
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Abstract
The invention relates to a method for manufacturing paper, paperboard or cardboard comprising the steps of
- (a) pulping an aqueous cellulosic material containing a starch;
- (b) preventing at least a portion of the starch from being microbially degraded by treating the aqueous cellulosic material containing the starch with one or more biocides; and
- (h) adding a dry and/or wet strength polymer to the cellulosic material.
37 Citations
25 Claims
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1. A method for manufacturing paper, paperboard or cardboard comprising the steps of
(a) pulping an aqueous cellulosic material containing a starch; -
(b) preventing at least a portion of the starch from being microbially degraded by treating the aqueous cellulosic material containing the starch with one or more biocides, which are at least partially added to the cellulosic material in the thick stock area, where the cellulosic material has a stock consistency of at least 2.0%; and (h) adding a dry and/or wet strength polymer to the cellulosic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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10-15. -15. (canceled)
Specification