Cellulose film containing modified melamine-formaldehyde resin as anchor medium

Claim 1

IN A PROCESS OF MANUFACTURING TOPCOATED NON-FIBROUS REGENERATED CELLULOSE FILM, WHEREIN A FILM OF VISCOSE SOLUTION IS DELIVERED INTO AN AQUEOUS SULFURIC ACID COAGULATING-REGENERATING BATH, THEREBY FORMING NON-FIBROUS REGENERATED CELLULOSE FILM IN WET SWOLLEN GEL FORM CONTAINING A SMALL AMOUNT OF SODIUM SULFATE, SAID FILM IS WASHED AT LEAST UNTIL A SAMPLE IS CLEAR WHEN APPARENTLY DRY, SAID FILM IS HEATED AT 160*-260*F. UNTIL APPARENTLY DRY, AND A HYDROPHOBIC ORGANIC TOPCOAT APPLIED THERETO, THE IMPROVEMENT WHICH CONSISTS IN IMPREGNATING SAID WET SWOLLEN FILM WITH A DILUTE AQUEOUS SOLUTION OF A CATHONIC THERMOSETTING HYDROPHILIC MELAMINE-FORMALDEHYDE-POLYALKYLENE-POLYAMINE-ALKANEPOLYOL CONDENSATION PRODUCT AS ANCHOR AGENT, SAID ALKANEPOLYOL BEING NORMALLY WATERSOLUBLE AND NON-IONIC AND BEING COMBINED IN SAID RESIN IN MINOR BUT EFFECTIVE AMOUNT AS COMPONENT INHIBITING PRECIPITATION OF SAID RESIN BY THE SODIUM SULFATE WHICH ACCUMULATES IN SAID BATH.