Process of combining synthetic resins and other materials with cellulose

Claim 1

THE STEPWISE PROCESS OF INCORPORATING SUBSTANTIAL AMOUNTS OF THERMOPLASTIC AND THERMOSETTING RESINS WITH CELLULOSIC PULP FIBERS TO THE FORMATION OF RESIN-CONTAINING PAPER WEBS, WHICH CONSISTS IN PRETREATING THE CELLULOSIC FIBERS IN AN AQUEOUS SUSPENSION WITH A CATIONICALLY ACTIVE WETTING AGENT WHICH IS NORMALLY ACTIVE TO COAGULATE SUBSEQUENTLY ADDED RESIN DISPERSIONS, SAID CATIONICALLY ACTIVE WETTING AGENT BEING AN IONIZABLE POLAR SUBSTANCE HAVING A POSITIVELY CHARGED WATER-SOLUBLE PORTION AND A LARGER WATER-INSOLUBLE SURFACE ACTIVE PORTION WHICH INCLUDES A RELATIVELY LONG ALKYL CHAIN, THE AMOUNT OF SUCH CATIONIC ACITVE WETTING AGENT, FROM ABOUT 5 TO ABOUT 9.6% BY WEIGHT BASED ON THE DRY WEIGHT OF THE CELLULOSIC FIBERS, BEING SUFFICIENT TO RENDER THE FIBERS CATIONIC ACTIVE BUT NOT SUBSTANTIALLY IN EXCESS OF SUCH AMOUNT, TREATING THE CATIONIC ACTIVE FIBERS IN AQUEOUS SUSPENSION WITH A WATERSOLUBLE SALT OF A TRIVALENT METAL OF THE GROUP CONSISTING OF THE WATER-SOLUBLE CHLORIDES, SULPHATES, ACETATES, FORMATES, PHOSPHATES AND NITRATES OF CHROMIUM, ALUMINUM, NICKEL, FERRIC ION AND GOLD, THE AMOUNT OF SAID SALT, FROM ABOUT 5 TO ABOUT 6% BY WEIGHT BASED ON THE DRY WEIGHT OF THE CELLULOSIC FIBERS, BEING NOT GREATER THAN AN AMOUNT WHICH WILL BE COMPLETELY EXHAUSTED ON THE CATIONIC ACTIVE FIBERS, THEREAFTER ADMIXING AN AQUEOUS SUSPENSION OF THE SO-TREATED FIBERS, FREE FROM TRIVALENT METAL SALT IN THE LIQUID PHASE, WITH A NEGATIVELY CHARGED AQUEOUS DISPERSION OF THE RESIN, THE AMOUNT OF RESIN BEING FROM 5% TO 300% BY WEIGHT BASED ON THE DRY WEIGHT OF THE FIBERS, AND FORMING A PAPER WEB FROM THE RESULTING PAPER STOCK.