Process for the production of cellulose fibre containing products in sheet or web form
First Claim
1. A process for the production of cellulose fiber containing products in a sheet or web form from a suspension of cellulose containing fibers, and optional fillers, comprising the addition of anionic, inorganic, colloidal particles and cationic carbohydrate polymer to the suspension, forming of the suspension on a wire and drying, wherein the cationic carbohydrate polymer is a cationic starch or a cationic galactomannan having a degree of substitution of at least 0.02 and containing at least 0.01 percent by weight of the aluminum which aluminum is bound in the molecules of the carbohydrate polymer.
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Abstract
Cellulose fibre containing products in sheet or web form, such as paper and pulp sheets, are produced from a suspension of cellulose containing fibres, and optional fillers, to which is added anionic inorganic particles, such as bentonite and silica based particles, and a cationic carbohydrate polymer containing aluminum. The cationic carbohydrate polymers are cationic galactomannans or cationic starch. High cationized starch with a degree of substitution of at least 0.07 are especially suitable.
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12 Claims
- 1. A process for the production of cellulose fiber containing products in a sheet or web form from a suspension of cellulose containing fibers, and optional fillers, comprising the addition of anionic, inorganic, colloidal particles and cationic carbohydrate polymer to the suspension, forming of the suspension on a wire and drying, wherein the cationic carbohydrate polymer is a cationic starch or a cationic galactomannan having a degree of substitution of at least 0.02 and containing at least 0.01 percent by weight of the aluminum which aluminum is bound in the molecules of the carbohydrate polymer.
- 7. A process according to claim 7, wherein the anionic inorganic particles are silica based particles.
Specification