Process for forming transparentized paper containing cotton linter fibers and paper thereof

Claim 1

A TRANSPARENTIZED PAPER COMPRISING A WEB OF COTTON LINTER FIBERS, WHICH FIBERS HAVE BEEN BEATEN TO A CANADIAN STANDARD FREENESS OF ABOUT 100 TO 300, IMPREGNATED WITH A CLEAR POLYMERIC FILM-FORMING ACRYLIC RESIN OF THE AQUEOUS EMULSION TYPE; SAID RESIN BEING PRESENT IN THE AMOUNT OF 15 TO 30 PARTS RESIN SOLIDS PER 100 PARTS OF FIBER; SAID RESIN BEING SELECTED FROM THE GROUP CONSISTING OF SOFT THERMOPLASTIC ACRYLIC RESINS AND HARD THERMOSETTING ACRYLIC RESINS; SAID SOFT THERMOPLASTIC RESISN BEING SELECTED FROM THE GROUP CONSISTING OF ALKYL ACRYLATE POLYMERS AND COPOLYMERS OF ALKYL ACRYLATES AND STYRENE, AND SAID HARD THERMOSETTING ACRYLIC RESINS COMPRISING A MIXTURE OF (1) A COPOLYMER OF (A) AT LEAST ONE MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, VINYLTOLUENE, ACRYLONITRILE, AND ACRYLIC AND METHACRYLIC ACID ALKYL ESTERS IN WHICH THE ALKYL GROUP CONTAINS FROM 1 TO 8 CARBON ATOMS AND (B) A MONOMER SELECTED FROMTHE GROUP CONSISTING OF ACRYLAMIDE OR METHYACRYLAMIDE, AND THE FORMALDEHYDE REACTION PRODUCTION OF SAID AMIDES INCLUDING METHYLOL AND METHOXYMETHYL DERIVATIVES, WITH (2) A WATER-SOLUBLE, THERMOSETTING AMINOPLAST AND (3) A VOLATILE TERTIARY AMINE; SAID RESIN BINDING SAID FIBER TOGETHER IN A SUBSTANTIALLY FIBERRESIN-FIBER RELATIONSHIP WHILE SUBSTANTIALLY FILLING THE VOIDS BETWEEN SAID FIBERS TO PROVIDE AN OPTICALLY CONTINUOUS SHEET.