Process of wet creaseproofing cellulose fabrics with specific aldehyde solutions containing specific metal salts and products produced thereby

Claim 1

A PROCESS FOR THE TREATMENT OF FABRICS FORMED OF CELLULOSE FIBERS TO IMPART TO THE FABRIC THE ABILITY TO RECOVER FROM CREASES IMPOSED ON THE FABRIC IN THE WET STATE SUFFICIENT TO SUBSTANTIALLY REDUCE THE NEED FOR IONING AFTER LAUNDERING WHICH COMPRISES IMPREGNATING SAID FABRIC WITH AT LEAST ABOUT 40 PARTS BY WEIGHT PER 100 PARTS OF THE DRY WEIGHT OF THE FABRIC OF AN AQUEOUS SOLUTION OF A WATER-SOLUBLE ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF RORMALDEHYDE, GLYOXAL, HYDROXY ADIPALDEHYDE, AND PYRUVIC ALDEHYDE, AN ACID HAVING AN IONIZATION CONSTANT OF AT LEAST 0.01 SELECTED FROM THE GROUP CONSISTING OF SULFURIC, PHODPHORIC, TRICHLORACETIC AND HYDROCHLORIC ACIDS AND A WATER-SOLUBLE METAL SALT SELECTED FROM THE GROUP CONSISTING OF CALCIUM CHLORIDE, MAGNESIUM CHLORIDE, SODIUM CHLORIDE, SODIUM BISULFATE, SODIUM NITRATE, SODIUM TRICHLORACETATE, MONOSODIUM PHOSPHATE, POTASSIUM CHLORIDE AND LITHIUM CHLORIDE, SAID SOLUTION CONTAINING BETWEEN ABOUT 50 TO 300 G./L. OF SAID ALDEHYDE, BETWEEN ABOUT 10 TO 300 G./L. OF ACID AND AN AMOUNT BETWEEN 50 AND 400 G./L. OF SAID SALT, THE CONCENTRATION OF SAID ACID IN CONJUCTION WITH SAID SALT BEING SUCH AS TO IMPART OF THE SOLUTION A PH BETWEEN ABOUT -0.2 AND -0.8, AND A SWELLING OF THE CELLULOSE FIBERS OF THE FABRIC AT LEAST ABOUT AS GREAT AS THE SWELLING IN PURE WATER, SAID CONCENTRATIONS BEING IN G./1. OF SOLUTION, AND CAUSING A REACTION TO OCCUR BETWEEN THE ALDEHYDE AND THE CELLULOSE FIBERS IF SAID FABRIC WHILE HOLDING THE FABRIC IN AN EXTENDED CONDITION COMPLETELY FREE OF ANY CREASE IN THE WER STATE SWOLLEN WITH SAID SOLUTION BY SO MAINTAINING THE SWOLLEN FABRIC AT A TEMPERATURE BETWEEN ABOUT 0* AND 100*C. FOR A TIME CORRESPONDING AT THE TEMPERATURE USED TO BETWEEN ABOUT 24 TO 48 HOURS AT 20*C., SAID TIME BEING AN INVERSE FUNCTION OF THE TEMPERATURE UNTIL A WET CREASE-PROOFING EFFECT IS OBTAINED, THEN COMPLETELY FREEING THE FABRIC OF ALL SAID SOLUTION AND DRYING THE SOLUTIONFREE FABRIC.