Process and apparatus for continuous dyeing of cellulosic circular knits

US5951717A · kind A · utility

Assignee

• Dy Star Textilfarben GmbH & Co. · DE

Inventors

• Uwe Mrotzeck · Kelkheim, DE
• Andreas Schrell · Hofheim, DE
• Thomas Nauroschat · Frankfurt, DE
• Erol Ozcan · Yalova, TR
• Alfred Tressel · Neunburg vorm Wald, DE

Key dates

• Filing date: Mar 10, 1998
• Grant date: Sep 14, 1999
• Expiry date: Mar 10, 2018

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06P3/60
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A dyeing process comprises continuous dyeing of cellulosic circular knit, which comprises impregnating a rope of said circular knit with an aqueous liquor comprising one or more dissolved and/or dispersed dyes, any necessary fixing alkali and optionally further assistants at a temperature between 20 and 95.degree. C., squeezing off said impregnated rope and subsequently feeding said squeezed-off rope without intermediary drying into an apparatus in which said rope is opened out into a crease-free state and said dye is fixed in an unsaturated steam/air mixture which is at 100 to 160.degree. C. at an autogenous wet temperature of the moist rope of between 50 and 95.degree. C. and a fixing time of at least 20 seconds.