Flameproofing of textiles
AssigneeAlbright & Wilson Limited
InventorRobert Cole
Life of this patent
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Abstract
A process for flameproofing cellulosic fabrics which comprises impregnating the fabric with an aqueous solution of a THP salt with or without condensation with a nitrogen-containing compound, and treating the impregnated fabric with ammonia to produce a cured resin, wherein the treatment with ammonia is carried out by passing the impregnated fabric through seals into and out of a closed chamber and in contact with at least one duct located in the chamber and having one or more orifices through which gaseous ammonia is caused to issue and pass through the fabric over its width, the chamber being provided with means to prevent condensed water formed by evaporation and/or chemical action from dripping on to the fabric.
Claims15
A process for flameproofing cellulosic fabrics in a closed chamber, wherein the fabric is impregnated with an aqueous solution of a tetrakis hydroxymethyl phosphonium salt, comprising in combination
- passing said impreganted fabric through said closed chamber;
- introducing gaseous ammonia into said chamber through at least one duct having one or more orifices and passing said impregnated fabric in contact with said duct and over said orifices;
- said orifices being so positioned that the gaseous ammonia passing through said orifices contacts said impregnated fabric and passes through said impregnated fabric;
- and
- passing condensed water formed in said chamber to a water-receiving means without said water contacting said impregnated fabric.
Dependencies are inferred from the claim text.