Method of treating cotton for fire retardation

Abstract

Abstract THE METHOD DISCLOSED COMPRISES THE STEPS OF FIRST EXPOSING THE INDIVIDUAL PORES OR FIBERS OF A MATERIAL AS MUCH AS POSSIBLE, THEN DISPERSING A DESIRED HYGROSCOPIC POWDER, E.G., UREA-DIAMMONIUM PHOSPHATE WITH A FREE-FLOWING, ANTI-CAKING AGENT SUCH AS PRECIPITATED SILICA, INTO THOROUGH CONTACT WITH THE EXPOSED FIBERS, HUMIDFYING THE EXPOSED FIBERS TO DISSOLVE THE POWDER AND PENETRATE THE FIBERS, E.G., BY A FOG OBTAINED BY MIXING STEAM WITH SATURATED AMBIENT AIR, AND FINALLY DRYING AND/OR CURING THE PENETRATED FIBERS TO GIVE RISE TO THE DESIRED CHARACTERISTIC IMPARTED BY THE PENETRATING SOLUTION SUCH AS FIRE RETARDATION. THE HYGROSCOPIC POWDER IS PREPARED BY DRYING THE CONSTITUENTS PRIOR TO PULVERIZING TO REDUCE THE MOSITURE CONTENT THEREOF TO LESS THAN TEN PERCENT, CIRCULATING HOT AIR DURING THE PULVERIZING PROCESS, AND ADDING A FREE-FLOWING, ANTI-CAKING AGENT BEFORE OR AFTER THE PULVERIZING PROCESS.

Inventors

• 👤 William L Kuechler

Bibliographic Details