Färbeverfahren für ein Cellulosisches Faserprodukt
Anmelder: ASAHI KASEI KABUSHIKI KAISHA 🇯🇵
Details
- Veröffentlichungs-Nr.
- EP4722444
- Anmeldetag
- 28. Mai 2024
- Veröffentlichung
- 5. Dezember 2024
- Rechtsraum
- EP
- IPC
- D06P3/66
Abstract
Provided is a novel dyeing method with which it is possible to obtain cellulose fiber products dyed with a reactive dye that have high color fastness and do not undergo hydrolysis due to an alkali treatment while reducing CO<sub>2</sub> emissions by using an alkaline washing under specific temperature and pH conditions. The present invention relates to a dyeing method for cellulose fibers or a fiber product containing cellulose fibers, the dyeing method being batch type or continuous type and including: a dyeing reaction step in which cellulose fibers or a fiber product containing cellulose fibers are reacted with a reactive dye in a dyeing liquid; an alkaline washing step in which all or part of the dyeing liquid is discharged, and then the dyed fibers or fiber product are washed with an alkaline washing liquid having a pH of 10 to 14 and a temperature of 15 to 70°C; and a post-alkaline washing step of discharging the alkaline washing liquid and then washing with water.
Anmelder
- Firma
- ASAHI KASEI KABUSHIKI KAISHA
- Land
- 🇯🇵 Japan
Asahi Kasei ist ein japanischer Mischkonzern mit Sitz in Tokio, der in den Bereichen Chemie und Kunststoffe, Wohnungsbau sowie Medizintechnik tätig ist. Das 1922 gegründete Unternehmen zählt zu den größten Chemiekonzernen Japans.
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