Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-09-27
1999-02-02
Lieberman, Paul
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510280, 510352, 510370, 510426, 510427, C11D 1002, C11D 343, C11D 122
Patent
active
058665242
DESCRIPTION:
BRIEF SUMMARY
The process of cleaning and conditioning textile fabrics has been carried out by various means for many centuries. Recently many improvements and refinements have been made to give more efficient processes for cleaning and conditioning textile fabrics. Modern-day processes basically involve a system to deliver active cleaning or conditioning materials to the fibre surface.
Many processes achieve this goal by immersing the textile fabrics in a solution, usually an aqueous solution of active materials. The solution soaks the fabrics thereby delivering the active materials to the fibre surface. Suitable solutions, or washing liquors, are often prepared by dissolving granular detergent products in water, or alternatively by dissolving liquid detergent in water.
Washing machines in common use in Western Europe provide a dispensing drawer which is specifically intended to mix detergent active products, either granular or liquid, with water. The mixture or solution is then delivered into a drum which contains the washing load (i.e. the textile fabrics). This method of delivery has been still further improved by the use of dispensing devices which can be filled with detergent active products and then loaded directly into the drum with the washing load. When the drum is filled with water, the high local concentrations of active materials gives the so-called "heart-of-the-wash" effect.
Other methods of delivering active materials to the fibre surface are known. For example impregnated sheets may be used to clean or condition fabrics if the impregnating materials include cleaning or conditioning agents.
Another refinement of the cleaning process has been the use of pretreatment on particularly difficult stains. Using this approach a concentrated detergent product is applied directly to the textile fabric in the region of the stain. This delivers a high concentration of detergent active materials at the fibre surface where it has maximum effect. Most recently the consumer has been encouraged to pretreat local areas of textile fabrics with concentrated liquid detergents, and then to wash the whole of the item in a dilute aqueous solution of the liquid detergent. This offers benefits of delivering a high concentration of the detergent active materials directly to the fibre surface, at least in areas where there are stains, and subsequently cleaning the whole of the fabric by immersing it in a washing solution. However, pretreatment is generally limited to local regions of the textile fabric.
The present invention offers a significant discontinuity in the method of delivering detergent active materials at the fibre surface. Furthermore, the present invention offers a means of delivering high concentrations of detergent active materials to all parts of the textile fabric, and not simply to local areas of the fabric, as in the case of pretreatment. This, in turn, leads to a highly efficient process of cleaning and conditioning textile fabrics resulting in a reduced requirement for detergent active ingredients giving lower costs, lower energy requirements and environmental benefits.
U.S. Pat. No. 4,118,189, issued on Oct. 3rd 1978, describes a method of washing textiles with a foamed detergent solution. The aqueous solution contains from 10 to 50 grams per liter of cleaning composition (from about 1% to about 5% by weight of "active" cleaning components in aqueous solution). The foam is formed by providing a source of compressed air which is blown into the aqueous solution, the foam is then contacted with the textiles. After collapse of the foam it is recycled by further applications of compressed air at least five times.
U.S. Pat. No. 4,499,620, issued on Feb. 19th 1985, describes a foam washing method. The foam is formed by blowing a gas through a "concentrated" aqueous solution of a detergent. Typical concentrations of aqueous solution as defined in this patent are from 0.3 to 1% by weight.
U.S. Pat. No. 3,796,599, issued on Mar. 12th 1974, describes a method for treating clothes in a clothes dryer with a foam. Anionic s
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Bolam Brian M.
Echler, Sr. Richard S.
Lieberman Paul
Ogden Nicholas
Procter & Gamble Company
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