Abstract

The present invention refers to a process for the direct cationization of cotton fiber and its dyeing with reactive dyes. The opening of the initial fiber is carried out with two cylinders with rounded tips. Subsequently, the fiber is impregnated with cationizing agents in a vat and then sent to an autoclave with soft water. The soft water vapor present in the autoclave heats the fiber and allows the fixation of the reagents in a homogeneous way. The fiber is rinsed, neutralized and centrifuged before being dried. The fiber obtained is converted into yarn. The cationized yarn forms a fabric to be dyed.

IPC Classes  ?

• D06P 5/22 - Effecting variation of dye affinity on textile material by chemical means that react with the fibre
• D01G 7/10 - Arrangements for discharging fibres
• C11D 1/38 - Cationic compounds
• D06L 1/18 - Working under pressure in closed vessels
• D06L 1/20 - Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents combined with mechanical means
• C07F 9/50 - Organo-phosphines
• D06L 4/70 - Multi-step processes
• D06P 1/62 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds with sulfate or sulfonate groups

Abstract

The present invention refers to a process for the direct cationization of cotton fiber and its dyeing with reactive dyes. The opening of the initial fiber is carried out with two cylinders with rounded tips. Subsequently, the fiber is impregnated with cationizing agents in a vat and then sent to an autoclave with soft water. The soft water vapor present in the autoclave heats the fiber and allows the fixation of the reagents in a homogeneous way. The fiber is rinsed, neutralized and centrifuged before being dried. The fiber obtained is converted into yarn. The cationized yarn forms a fabric to be dyed.

IPC Classes  ?

• D06P 1/00 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed
• D06P 1/382 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using reactive dyes with a reactive group directly attached to the heterocyclic group
• D06P 5/02 - After-treatment

Goods & Services

Bed blankets; Bed linen; Bed linen made of non-woven textile materials; Fabrics for textile use