Transfer printing
AssigneesI.W.S. Nominee Company Limited, Commonwealth Scientific and Industrial Research Organization
InventorsDavid M. Lewis, Peter R. Brady, Peter G. Cookson, Keith W. Fincher
Life of this patent
Estimating the term…
Abstract
Color yield of the coloration processes for textile and like materials, more especially of sublimable dyes applied by transfer printing, is enhanced by pretreatment of the material by deposition of 1 to 10% surfactant or other amphipathic substance. Preferred substances are cationic, anionic or non-ionic surfactants, which may be applied from aqueous solution at levels of 1 to 10% on the weight of the material. The material is dried before printing. The surfactants can be accompanied by swelling agents, catalysts or cross-linking agents. Preferred dyes for the printing stage are sublimable dyes containing chelatable groups, fibre-reactive groups or cross-linkable groups.
Claims8
A method of coloring a textile material containing natural fiber with enhanced color yield consisting of the steps of:
- applying to said material a solution consisting of at least one anionic or cationic surface active agent effective to enhance the color yield in subsequent coloring and a solvent for said surface active agent and drying said material to leave deposited thereon from 1 to 10% by weight, based on the weight of the textile, of said at least one surface active agent;
- applying a sublimable dye to said textile material in the dry condition in the presence of said at least one surface active agent;
- and subjecting said textile material bearing said dye and said at least one surface active agent to heat thereby fixing said dye on said textile material;
- wherein,
- said anionic or cationic surface active agent is an organic compound consisting of a polar group and a non-polar group, said non-polar group consisting of a straight chain, branched chain, ring chain or unsaturated alkyl group containing from one to twenty carbon atoms, and said polar group consisting of (1) an anionic group selected from the group consisting of carboxylate, sulfate, thiosulfate, sulfonate, sulfinate, sulfamate, phosphate, pyrophospate and phosphonite, or (2) a cationic group selected from the group consisting of protonated primary, secondary and tertiary amine groups and quaternary ammonium, pyridium, picolinium, imidazole, benzimidazole, tertiary oxonium, tertiary sulfonium and quaternary phosphonium groups.
A method of coloring a textile material containing natural fiber with enhanced color yield consisting of the steps of:
- applying to said material a solution consisting of at least one compound selected from the class consisting of:
- dye diffusion promoters, chelating metal compounds, organic carboxylic acids, cross-linking agents, catalysts, textile finishing agents and solvents, at least one anionic or cationic surface active agent effective to enhance the color yield in subsequent coloring and a solvent for said surface active agent and drying said material to leave deposited thereon from 1 to 10% by weight, based on the weight of the textile, of said at least one surface active agent;
- applying a sublimable dye to said textile material in the dry condition in the presence of said at least one surface active agent;
- and subjecting said textile material bearing said dye and said at least one surface active agent to heat thereby fixing said dye on said textile material;
- wherein,
- said anionic or cationic surface active agent is an organic compound consisting of a polar group and a non-polar group, said non-polar group consisting of a straight chain, branched chain, ring chain or unsaturated alkyl group containing from one to twenty carbon atoms, and said polar group consisting of (1) an anionic group selected from the group consisting of carboxylate, sulfate, thiosulfate, sulfonate, sulfinate, sulfamate, phosphate, pyrophosphate and phosphonite, or (2) a cationic group selected from the group consisting of protonated primary, secondary and tertiary amine groups and quaternary ammonium, pyridium, picolinium, imidazole, benzimidazole, tertiary oxonium, tertiary sulfonium and quaternary phosphonium groups.
In the method of printing textile or like material containing natural fibers consisting of the steps of:
- printing a sublimable dye on a transfer sheet;
- applying said sheet in contact with said material and thereby transferring said dye from said sheet to said material, the improvement consisting of:
- pretreating said material by depositing therein from 1 to 10% by weight, based on the weight of the textile, of at least one anionic or cationic surface active agent effective to enhance the color yield in such printing;
- wherein,
- said anionic or cationic surface active agent is an organic compound consisting of a polar group and a non-polar group consisting of a straight chain, branched chain, ring chain or unsaturated alkyl group containing from one to twenty carbon atoms, said polar group consisting of (1) an anionic group selected from the group consisting of carboxylate, sulfate, thiosulfate, sulfonate, sulfinate, sulfamate, phosphate, pyrophosphate and phosphonite, or (2) a cationic group selected from the group consisting of protonated primary, secondary and tertiary amine groups and quaternary ammonium, pyridium, picolinium, imidazole, benzimidazole, tertiary oxonium, tertiary solfonium and quaternary phosphonium groups.
Dependencies are inferred from the claim text.