Paper and method of making same

Claim 1

A PAPER PRODUCT RESISTANT TO BLEEDING THROUGH OF OILSOLUBLE THERMOPLASTIC COATINGS WHICH INCLUDES A SHEET OF CELLULOSIC PAPER IMPREGNATED WITH AN OLEPHOBIC AND HYDROPHOBIC CONDITIONING AGENT, AND A COATING OF OIL SOLUBLE, WATER INSOLUBLE THERMOPLASTIC MATERIAL ON THE CONDITIONED SHEET, SAID PAPER HAVING A BASIS WEIGHT BETWEEN 15 AND 90 POUNDS PER REAM OF 3000 SQUARE FEET, SAID CONDITIONING AGENT BEING A CHROMIUM COORDINATION COMPLEX OF THE SATURATED PERFLUOROMONOCARBOXYLIC ACIDS HAVING FROM 4 TO 10 CARBON ATOMS IN THE MOLECULE, SAID CONDITIONING AGENT BEING PRESENT IN AN AMOUNT SUCH THAT THE INITIAL CONTACT ANGLE OF OIL SOLUBLE, WATER INSOLUBLE THERMOPLASTIC MATERIAL EXCEEDS 60 DEGREES AND DOES NOT CHANGE SUBSTANTIALLY IN THE TIME BETWEEN 2 MINUTES AND 5 MINUTES IN AN OVEN AT 220*F., THE AMOUNT OF SAID CONDITIONING AGENT ALSO BEING SUCH THAT THE POROSITY OF THE SHEET IS NOT SUBSTANTIALLY IMPAIRED.

Claim 3

THE METHOD OF MAKING A FLEXIBLE, POROUS, MOISTURERESISTANT LAMINATED CELLULOSIC PRODUCT WHICH IS RESISTANT TO BLEEDING THROUGH OF OIL-SOLUBLE, WATER-INSOLUBLE ADHESIVE THERMOPLASTIC APPLIED THERETO, SAID METHOD INCLUDING THE STEPS OF IMPREGNATING AT LEAST ONE FACE OF A PLURALITY OF SHEETS OF A SUBSTANTIALLY DRY, POROUS, FLEXIBLE CELLULOSIC MATERIAL WITH A SUFFICIENT VOLUME OF LIQUID TO PENETRATE INTO THE BODY OF EACH SHEET, SAID LIQUID HAVING DISPERSED THEREIN SUFFICIENT MATERIAL WHICH IS CAPABLE OF BEING SET BY HEAT TO FORM AN OLEOPHOBIC, HYDROPHOBIC CHROMIUM COORDINATION COMPLEX OF PERFLUOROMONOCARBOXYLIC ACIDS HAVING 4 TO 10 CARBON ATOMS TO PROVIDE EACH SHEET WITH AN AMOUNT OF SAID CHROMIUM COORDINATION COMPLEX SUCH THAT SAID SHEET WILL MAINTAIN A SUBSTANTIALLY CONSTANT CONTACT ANGLE OF MORE THAN 60 DEGREES WITH AN OIL-SOLUBLE, WATERINSOLUBLE, ADHESIVE THERMOPLASTIC PLACED IN CONTACT WITH EACH SHEET, WHEN EACH SHEET IS TESTED AT A TEMPERATURE OF 220* F. OVER A PERIOD OF FROM 2 TO 10 MINUTES, DRYING SAID IMPREGNATED SHEETS BY HEAT TO PROVIDE SAID CHROMIUM COORDINATION COMPLEX, AND LAMINATING SAID IMPREGNATED SHEETS TOGETHER WITH AN OIL-SOLUBLE, WATER-INSOLUBLE ADHESIVE THERMOPLASTIC WHICH IS SOLID ABOVE ABOUT 65* F., WHEREBY A MOISTURE-RESISTANT, LAMINATED CELLULOSIC SHEET PRODUCT RESISTANT TO BLEEDING THROUGH OF SAID THERMOPLASTIC AND WITH SUBSTANTIALLY UNIMPAIRED POROSITY AND FLEXIBILITY IS OBTAINED.

Claim 4

THE METHOD OF MAKING A FLEXIBLE, POROUS, MOISTURERESISTANT LAMINATED CELLULOSIC PRODUCT WHICH IS RESISTANT TO BLEEDING THROUGH OF OIL-SOLUBLE, WATER-INSOLUBLE ADHESIVE THERMOPLASTIC APPLIED THERETO, SAID METHOD INCLUDING THE STEPS OF IMPREGNATING AT LEAST ONE FACE OF A PLURALITY OF SHEETS OF A SUBSTANTIALLY DRY, POROUS, FLEXIBLE CELLULOSIC MATERIAL WITH A SUFFICIENT VOLUME OF LIQUID TO PENETRATE INTO THE BODY OF EACH SHEET, SAID LIQUID HAVING DISPERSED THEREIN SUFFICIENT MATERIAL WHICH IS CAPABLE OF BEING SET BY HEAT TO FORM AN OLEOPHOBIC, HYDROPHOBIC CHROMIUM COORDINATION COMPLEX OF PERFLUOROMONOCARBOXYLIC ACIDS HAVING 4 TO 10 CARBON ATOMS TO PROVIDE EACH SHEET WITH AN AMOUNT OF SAID CHROMIUM COORDINATION COMPLEX SUCH THAT SAID SHEET WILL MAINTAIN A SUBSTANTIALLY CONSTANT CONTACT ANGLE OF MORE THAN 60 DEGREES WITH AN OIL-SOLUBLE, WATERINSOLUBLE, ADHESIVE THERMOPLASTIC PLACED IN CONTACT WITH EACH SHEET, WHEN EACH SHEET IS TESTED AT A TEMPERATURE OF 220* F. OVER A PERIOD OF FROM 2 TO 10 MINUTES, DRYING SAID IMPREGNATED SHEETS BY HEAT TO PROVIDE SAID CHROMIUM COORDINATION COMPLEX, AND LAMINATING SAID IMPREGNATED SHEETS TOGETHER WITH AN OIL-SOLUBLE, WATER-INSOLUBLE ADHESIVE THERMOPLASTIC WHICH IS SOLID ABOVE ABOUT 65* F., WHEREBY A MOISTURE-RESISTANT, LAMINATED CELLULOSIC SHEET PRODUCT RESISTANT TO BLEEDING THROUGH OF SAID THERMOPLASTIC AND WITH SUBSTANTIALLY UNIMPAIRED POROSITY AND FLEXIBILITY IS OBTAINED.