Method of manufacturing paper or cardboard products
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United States of America Patent
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-
Jul 1, 1980
Issued Date -
N/A
app pub date -
Dec 19, 1978
filing date -
Jul 14, 1976
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Paper or cardboard products are manufactured by mixing an aqueous solution or dispersion of a cationic starch with an aqueous suspension of a kaolinitic clay filler, and adding the resulting mixture to a stock of cellulosic fibres to form a furnish containing the kaolinitic clay filler, the cationic starch and the cellulosic fibres, which furnish is then formed into the desired paper or cardboard products, the amount of shear to which the mixture containing the clay filler and cationic starch is subjected being controlled to ensure that the furnish contains flocs of clay filler and cationic starch of a desired size.
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