Multiple step dyeing textile with concentrated dye systems
View Patent ↗The present invention relates to a process for dyeing sheetlike textile materials with a dye, which comprises a concentrated dye system being applied in a total amount of 1% to 25% by weight, based on the textile material, to the textile material in two or more sub-steps and the dye being fixed on the textile material after each and every sub-step.
1. A process for dyeing sheetlike textile materials with a dye, which comprises applying a concentrated dye system in a total amount of 1% to 25% by weight, based on the textile material, to the textile material in two or more sub-steps and the dye being fixed on the textile material after each and every sub-step.
2. The process as claimed in claim 1 , wherein the sheetlike textile material is a cellulose fiber material present as a sheet of threads or as a rope of threads.
3. The process as claimed in claim 1 , wherein indigo or sulfur dye is used.
4. The process as claimed in claim 2 , wherein indigo or sulfur dye is used.
5. The process as claimed in claim 1 , wherein the concentrated dye system is present as a dye solution, a dye dispersion, a dye foam or a dye aerosol.
6. The process as claimed in claim 4 , wherein the concentrated dye system is present as a dye solution, a dye dispersion, a dye foam or a dye aerosol.
7. The process as claimed in claim 1 , wherein the concentrated dye system contains dye in amounts of 2% to 40% by weight, based on the entire dye system.
8. The process as claimed in claim 6 , wherein the concentrated dye system contains dye in amounts of 2% to 40% by weight, based on the entire dye system.
9. The process as claimed in claim 1 , wherein the concentrated dye system is present as an aqueous solution, a foam or an aerosol of leucoindigo.
10. The process as claimed in claim 8 , wherein the concentrated dye system is present as an aqueous solution, a foam or an aerosol of leucoindigo.
11. The process as claimed in claim 1 , comprising 2 to 10 sub-steps.
12. The process as claimed in claim 10 , comprising 2 to 10 sub-steps.
13. The process as claimed in claim 1 , wherein different dyes are applied in the sub-steps.
14. The process as claimed in claim 12 , wherein different dyes are applied in the sub-steps.
15. The process as claimed in claim 13 , wherein leucoindigo and sulfur dye are applied in the sub-steps.
16. The process as claimed in claim 14 , wherein leucoindigo and sulfur dye are applied in the sub-steps.
17. The process as claimed in claim 1 , wherein no further processing steps are carried out between the sub-steps.
18. The process as claimed in claim 16 , wherein no further processing steps are carried out between the sub-steps.