Process for precipitating sheet-forming fibrids

Claim 1

IN THE PROCESS OF PRECIPITATING SHEET-FORMING FIBRID PARTICLES FROM A SOLUTION IN ORGANIC LIQUID OF A POLYMER WHOSE FRESHLY FORMED SURFACES DISPLAY PRESSURE SENSITIVE ADHESION TO EACH OTHER AT A TEMPERATURE BELOW 25*C., BY INTRODUCING THE SOLUTION OF THE POLYMER INTO A NON-SOLVENT FOR THE POLYMER UNDER CONDITIONS OF HIGH-SHEAR PRECIPITATION, SAID POLYMER BEING A MEMBER OF THE GROUP CONSISTING OF (1) A COPOLYMER PREPARED FROM 40 MOL-PERCENT OF N-N''-DIISOBUTYL HEXAMETHYLENE-DIAMMONIUMSEBACATE, 20 MOL-PERCENT OF N-ISOBUTYL HEXAMETHYLENE-DIAMMONIUM SEBACATE, AND 40 MOL-PERCENT OF HEXAMETHYLENE-DIAMMONIUM SEBACATE AND (2) A COPOLYESTER PREPARED FROM ETHYLENE GLYCOL AND A 60/40 BY WEIGHT MIXTURE OF THE DIMETHYL ESTERS OF TEREPHTHALIC ACID AND SEBACIC ACID, THE IMPROVEMENT WHICH COMPRISES CARRYNG OUT THE PROCESS IN THE PRESENCE OF AN AQUEOUS SOLUTION OF CARBOXYMETHYL CELLULOSE PRESENT IN THE AMOUNT OF ABOUT 0.1% TO ABOUT 5% OF THE WEIGHT OF SAID NON-SOLVENT.