Process for preparing laminated bodies of cellulosic materials and product

Claim 1

THE METHOD OF PREPARING A LAMINATED BODY COMPRISING AT LEAST A PAIR OF ADHERED CELLULOSIC PLIES AND CHARACTERIZED BY ITS ABILITY TO RETAIN ITS INTEGRITY AND TO EXHIBIT WATER-RESISTANCE AT THE GLUE LINE OF SAID PLIES WHEN THE BODY IS IMMERSED IN WATER, SAID METHOD COMPRISING THE STEPS OF: APPLYING TO AT LEAST ONE SURFACE OF AN ALUMTREATED PAPER PLY AN AQUEOUS FILM OF QUICK-SETTING PROTEINACEOUS ADHESIVE HAVING A TOTAL DISPERSED SOLIDS CONTENT BETWEEN 10% AND 61% AND AN AIKALINE PH, AND COMPOSED ESSENTIALLY OF (A) FINELYDIVIDED SOLIDS, (B) DISPERSED PROTEIN FROM THE CLASS CONSISTING OF CASEIN, VEGETABLE-SEED PROTEIN AND MIXTURES THEREOF, AND (C) WATER, SAID FINELYDIVIDED SOLIDS INCLUDING MINERAL SOLIDS WITH THE LATTER IN A RATIO TO DISPERSED PROTEIN BETWEEN ABOUT 1 TO 10 AND 10 TO 1, AND SAID ADHESIVE HAVING A RATIO OF WATER TO PROTEIN OF BETWEEN ABOUT 3 TO 1 AND 19 TO 1; AND FIRMLY CONTACTING SAID FILM BEFORE IT SETS WITH ANOTHER PLY OF CELLULOSIC MATERIAL, SAID ALKALINE FILM OF ADHESIVE BEING APPLIED WHILE YET BEING SUFFICIENTLY THIN TO BE ACIDIFIED TO AN ACID PH SUBSTANTIALLY THROUGHOUT ITS THICKNESS SOLELY BY THE ACIDITY OF THE ALUM-TREATED PAPER OF SAID LAMINATED BODY.

Claim 2

THE METHOD OF PREPARING A LAMINATED BODY COMPRISING AT LEAST A PAIR OF ADHERED CELLULOSIC PLIES AND CHARACTERIZED BY ITS ABILITY TO RETAIN ITS INTEGRITY AND TO EXHIBIT WATER-RESISTANCE AT THE GLUE LINE OF SAID PLIES WHEN THE BODY IS IMMERSED IN WATER, SAID METHOD COMPRISING THE STEPS OF: APPLYING TO AT LEAST ONE SURFACE OF AN ALUMTREATED PAPER PLY AN AQUEOUS FILM OF QUICK-SETTING PROTEINACEOUS ADHESIVE HAVING A TOTAL DISPERSED SOLIDS CONTENT BETWEEN 10% AND 61% AND AN AIKALINE PH, AND COMPOSED ESSENTIALLY OF (A) FINELYDIVIDED SOLIDS, (B) DISPERSED PROTEIN FROM THE CLASS CONSISTING OF CASEIN, VEGETABLE-SEED PROTEIN AND MIXTURES THEREOF, AND (C) WATER, SAID FINELYDIVIDED SOLIDS INCLUDING MINERAL SOLIDS WITH THE LATTER IN A RATIO TO DISPERSED PROTEIN BETWEEN ABOUT 1 TO 10 AND 10 TO 1, AND SAID ADHESIVE HAVING A RATIO OF WATER TO PROTEIN OF BETWEEN ABOUT 3 TO 1 AND 19 TO 1; AND FIRMLY CONTACTING SAID FILM BEFORE IT SETS WITH ANOTHER PLY OF CELLULOSIC MATERIAL, SAID ALKALINE FILM OF ADHESIVE BEING APPLIED WHILE YET BEING SUFFICIENTLY THIN TO BE ACIDIFIED TO AN ACID PH SUBSTANTIALLY THROUGHOUT ITS THICKNESS SOLELY BY THE ACIDITY OF THE ALUM-TREATED PAPER OF SAID LAMINATED BODY.