Process and apparatus for applying a chemical to a textile substrate
AssigneeCiba-Geigy Corporation
InventorJoseph S. Chappell
Life of this patent
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Abstract
A chemical, such as a dye, is applied to a textile substrate, such as carpet, by continuously moving the substrate past an application position. At the application position a liquid formulation containing the chemical, heated to a temperature below the boiling point thereof, is sprayed toward the substrate, thereby driving the chemical into the substrate. The temperature of the spray is controlled such that the dye contacts the substrate at a temperature sufficient to achieve substantially instantaneous fixation.
Claims11
A continuous process for applying and simultaneously fixing an acid dye to a polyamide carpet, said process comprising:
- heating a liquid formulation containing said acid dye to a temperature just below the boiling point thereof;
- continuously moving said polyamide carpet past an application position;
- and
- at said application position directly spraying said heated liquid dye formulation in the absence of a gaseous carrier toward said polyamide carpet, thus driving said heated liquid dye formulation into said polyamide carpet at a temperature sufficient to achieve substantially instantaneous fixation of said dye.
A continuous process for applying and simultaneously fixing a trichromatic acid dye mixture to a natural or synthetic polyamide carpet, said process comprising:
- heating a liquid formulation containing said trichromatic dye mixture to a temperature just below the boiling point thereof;
- continuously moving said polyamide carpet past an application position;
- and
- at said application position directly spraying said heated liquid dye formulation in the absence of a gaseous carrier toward said polyamide carpet, thus driving said heated liquid dye formulation into said polyamide carpet at a temperature sufficient to achieve substantially intantaneous fixation of said dye.
Dependencies are inferred from the claim text.