Method for increasing filler retention in paper
First Claim
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1. A METHOD FOR THE MANUFACTURE OF PAPER WHICH COMPRISES THE STEPS OF FORMING AN AQUEOUS SUSPENSION OF CELLULOSIC FIBER AND MINERAL FILLER, SAID FILLER COMPRISING FROM ABOUT 1 TO 20 PERCENT BY WEIGHT OF BENTONITE, AND ADDING TO SAID SUSPENSION AN AQUEOUS SOLUTION OF AN ACRYLAMIDE POLYMER CHARACTERIZED BY A VISCOSITY OF AT LEAST 1 CENTIPOISE, SAID POLYMER BEING EMPLOYED IN THE AMOUNT OF FROM 0.005 TO ABOUT 0.25 PERCENT BY WEIGHT BASED ON THE WEIGHT OF FILLER IN THE SUSPENSION.
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1 Claim
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1. A METHOD FOR THE MANUFACTURE OF PAPER WHICH COMPRISES THE STEPS OF FORMING AN AQUEOUS SUSPENSION OF CELLULOSIC FIBER AND MINERAL FILLER, SAID FILLER COMPRISING FROM ABOUT 1 TO 20 PERCENT BY WEIGHT OF BENTONITE, AND ADDING TO SAID SUSPENSION AN AQUEOUS SOLUTION OF AN ACRYLAMIDE POLYMER CHARACTERIZED BY A VISCOSITY OF AT LEAST 1 CENTIPOISE, SAID POLYMER BEING EMPLOYED IN THE AMOUNT OF FROM 0.005 TO ABOUT 0.25 PERCENT BY WEIGHT BASED ON THE WEIGHT OF FILLER IN THE SUSPENSION.
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Current AssigneeDavid J. Pye
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Original AssigneeDavid J. Pye
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InventorsPye, David J.
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Application NumberUS03/507,732Time in Patent Office2,673 DaysField of SearchUS Class Current162/164.6CPC Class CodesD21H 17/375 Poly(meth)acrylamideD21H 17/675 Oxides, hydroxides or carbo...D21H 17/68 siliceous, e.g. clays
