Process for bleaching textiles in the mechanical laundry drier

Details Process for bleaching textiles in the mechanical laundry drier Process for bleaching textiles in the mechanical laundry drier

1978-09-25

1981-01-06

Griffin, Ronald W.

Bleaching and dyeing; fluid treatment and chemical modification

Bleaching

Chemical

8101, 8107, 8137, D06L 302, D06L 314, D06L 316

Patent

active

042433916

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.

REFERENCES:
patent: 2173474 (1939-09-01), Evoy
patent: 2194358 (1940-03-01), Hundt et al.
patent: 2489278 (1949-11-01), Fink
patent: 2777749 (1957-01-01), Young
patent: 2858183 (1958-10-01), Potter
patent: 2859087 (1958-11-01), Hawkinson et al.
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patent: 3525695 (1970-08-01), Mouret et al.
patent: 4016090 (1977-04-01), Nakagawa et al.
patent: 4017411 (1977-04-01), Diehl et al.
Shanley, E. S. et al., The Hydrogen Peroxide Dry-In Process for Bleaching Wool, Amer. Dyestuff Reporter, vol. VO, No. 1, pp. 1-4, Jan. 8, 1951.

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