| 摘要 |
Carpeting, upholstery, drapery and other textile fibers are cleaned by applying to the fibers, at elevated or ambient pressures, an aqueous effervescing internally carbonated non-detergent cleaning composition prepared by admixing, in percent by weight, about 20 to 60 % of a carbonate salt, about 20 to 60 % of a solid acid, and 5 to 40 % urea in an aqueous medium such that the solid acid reacts with the carbonate salt to produce carbon dioxide. When applied as an aqueous solution, the solids' concentration in the solution resulting from the carbonate salt, solid acid and urea is between about 0.5 and 10 % by weight. Citric acid and sodium carbonate are the preferred solid acid and carbonate salt. The composition is prepared from naturally occurring ingredients and may be applied from a pressurized container which is pressurized by carbon dioxide, air or other environmentally safe gaseous materials. The composition may also be applied as a powder to which water is added to cause carbonation to occur in situ. |
