Process for bleaching textiles in the mechanical laundry drier

US4243391A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien (Henkel KGAA) · DE

Inventors

• Rolf Puchta · Haan, DE
• Karl Schwadtke · Leverkusen, DE
• Hans E. Harder · Probsteierhagen, DE
• Rudolf Weber · Bad Aibling, DE

Key dates

• Filing date: Sep 25, 1978
• Grant date: Jan 6, 1981
• Expiry date: Sep 25, 1998

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06F58/203
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a process for bleaching washed textiles in the tumbler of a mechanical laundry drier with an aqueous solution of hydrogen peroxide in an amount such that the residual moisture adhering to the textile material before drying contains 0.05 to 1 gm/liter of hydrogen peroxide, the drying being conducted so that the moist textile material assumes a temperature of at least 50.degree. C., preferably 55.degree. C. to 80.degree. C., for a period of at least 10 to 60 minutes. An addition of quaternary ammonium salts improves the bleach result and the softness of the textile material. An addition of a powdered bleaching activator of the N-acyl type also improves the bleach results.