Stain-discharging and removing system
View Patent ↗A cleaning composition that can discharge the color of blood, menstrual fluids, or other organic stains is provided. In particular, the present invention achieves a balance between control of unwanted liquid spreading by lateral wicking on a stained textile fabric to lessen the size of wet spots and maintaining the cleaning efficacy of the composition by means of specific kinds of thickening agents. The composition includes an oxidizing agent such as peroxides, a cell-lysing agent, a chelating agent, an antioxidant, a thickener, and other optional ingredients that are selectively employed to achieve an aqueous based composition that exhibits good shelf stability and stain removal properties. The thickening agent may include a cellulosic or clay material, starch, gum, fatty acid, fatty alcohol, hydrophilic colloidal particles, polyoxyethylene glycol or polyoxyethylene glycol derivatives including fatty acid esters and ethers, or a combination thereof.
1. A method for discharging a stain from a textile substrate, the method comprising: providing a textile substrate that has an organic colorant or stain on a first facing; applying an absorbent substrate against a side of said textile substrate either directly in contact to said first facing with the stain or on a second facing behind or opposite from said stain; and treating with a stain-discharging composition the side of said textile substrate opposite of said absorbent substrate, such that said stain-discharging composition is drawn through said textile substrate with the stain into said absorbent substrate, wherein the stain-discharging composition comprises from about 0.1 wt. % to 0.68 wt. % of at least one peroxide, from about 0.1 wt. % to 0.9 wt. % at least one cell lysing agent, a polar solvent, an antioxidant, a chelating agent, and a non-acrylate thickening agent.
2. The method according to claim 1 , further comprising mechanically abrading or physically agitating the textile substrate or stain either during or after the treating step.
3. The method according to claim 2 , further comprises using a device to physically agitate the stain.
4. The method according to claim 1 , wherein said stain-discharging composition further comprises: from about 0.05 wt. % to about 10 wt. % of at least one chelating agent, from about 0.0005 wt. % to about 5 wt. % of at least one antioxidant, from about 0.001 wt. % to about 10 wt. % of the non-acrylate thickening agent, and from about 50 wt. % to about 99.9 wt. % of least one polar solvent.
5. The method according to claim 1 , wherein the non-acrylate thickening agent includes a clay, starch, cellulose, gum, or a combination thereof.
6. The method according to claim 1 , wherein the textile substrate is permeable to a liquid.
7. The method according to claim 1 , wherein said stain is situated between said absorbent substrate and a source direction from which treatment is applied.
8. The method according to claim 1 , wherein said method produces an observable color change in which the color of a stain is reduced by a ΔE value ≧5.
9. The method according to claim 8 , wherein the color of the stain is reduced by at least a ΔE value of 15.
10. The method according to claim 1 , wherein said colorant or stain is discharged within a period of about 30 minutes after treatment.
11. The method according to claim 1 , wherein said colorant or stain is discharged within 15 minutes after treatment.