Cold water wash method

• US 5,645,608 A
• Filed: 04/17/1996
• Issued: 07/08/1997
• Est. Priority Date: 01/03/1996
• Status: Expired due to Fees

• Current Assignee: Cyclo3pss Corp.
• Original Assignee: Allyson T. Toney, John B. Mcparlane, Theodore R. Cooper
• Inventors: Toney, Allyson T., McParlane, John B., Cooper, Theodore R.
• Primary Examiner(s): Diamond, Alan D.
• Application Number:
  US08/633,573
• Time in Patent Office: 447 Days
• Field of Search: 8/137, 8/111, 8/149.1, 8/149.2, 8/158, 510/302, 510/303
• US Class Current: 8/137
• CPC Class Codes: C02F 1/78 with ozone C02F1/4672 takes precedence
• CPC Class Codes: C11D 2111/12 Soft surfaces, e.g. textile
• CPC Class Codes: C11D 2111/44 Multi-step processes
• CPC Class Codes: D06L 1/22 Processes involving successive treatments with aqueous and organic agents
• CPC Class Codes: D06L 4/50 by irradiation or ozonisation

Abstract

A cold water washing method for reducing the soil load on a textile by introducing the textile and cold water into an internal assembly within a washing machine. The method includes a first break wash wherein the textile, water, and a solvent are introduced into the washing machine to initiate soil removal. In a second break wash, a surfactant and an alkali are added to the first break wash to continue the washing cycle. The combined first and second break washes are drained from the internal assembly and the textile is rinsed with water. After draining the first rinse from the internal assembly, a second rinse including ozonated water and an acid is introduced into the internal assembly. The second rinse is drained from the internal assembly and a third rinse, which includes ozonated water, is introduced into the internal assembly to rinse the textile.

Claims

1. A method of reducing the soil load on a soiled textile using cold water in a washing machine containing the textile, the washing machine having an outer shell for containing fluids and an internal assembly for containing the textile and fluids, said method comprising:

introducing a first break wash into the outer shell and internal assembly, thus contacting the textile with the first break wash and wetting the textile, said first break wash comprising cold water and an organic solvent;

combining a second break wash with the first break wash in the outer shell and internal assembly, said second break wash comprising water, a surfactant, and an alkali;

removing the combined first and second break washes and any associated soil from the internal assembly and the outer shell;

introducing a first rinse solution into the outer shell and internal assembly, thus contacting the textile with said first rinse solution, said first rinse solution comprising cold water;

removing the first rinse solution and any soil associated therewith from the internal assembly and the outer shell;

introducing a second rinse solution into the outer shell and internal assembly to contact said second rinse solution with the textile, said second rinse solution comprising ozonated cold water and an acid;

removing the second rinse solution and any associated soil from the internal assembly and the outer shell; and

introducing a third rinse solution into the outer shell and internal assembly to contact the textile with said third rinse solution, said third rinse solution comprising ozonated cold water, thereby reducing the soil load on the textile.

2. The method of claim 1, wherein the textile is contacted with said first break wash for a period of time of about 1 minute to about 30 minutes.

3. The method of claim 1, wherein the textile is in contact with said combined first break wash and second break wash for a period of timed of about 1 minute to about 30 minutes.

4. The method of claim 1, wherein the textile is contacted with said first rinse solution for a period of time of about 1 minute to about 10 minutes.

5. The method of claim 1, wherein the textile is contacted with said second rinse solution for a period of time of about 1 minute to about 10 minutes.

6. The method of claim 1, wherein the textile is contacted with said third rinse solution for a period of time of about 1 minute to about 10 minutes.

7. The method of claim 1, wherein said solvent is selected from the group consisting of mineral spirits, petroleum based solvents, terpene hydrocarbons, citrus based solvents, and mixtures thereof.

8. The method of claim 1, wherein said surfactant is a non-ionic surfactant.

9. The method of claim 8, wherein said surfactant comprises an alkyl ethoxylate.

10. The method of claim 8, wherein said surfactant comprises a nonylphenol suffactant.

11. The method of claim 1, wherein said acid is selected from the group consisting of organic acids, mineral acids, and mixtures thereof.

12. The method of claim 11, wherein said acid is acetic acid.

13. The method of claim 1, wherein said alkali is selected from the group consisting of sodium metasilicate, potassium orthosilicate, sodium orthosilicate, potassium metasilicate, sodium hydroxide, and potassium hydroxide.

14. The method of claim 1, wherein the internal assembly'"'"'s temperature is maintained at a temperature from about 4°

C. to about 49°

C.

15. The method of claim 1, wherein said ozonated cold water comprises bubbles of ozone gas having a size from about 5 microns to about 5000 microns in diameter.

16. The method of claim 1, wherein the concentration of ozone in the ozonated cold water in the second or third rinse solutions ranges from about 0.01 ppm to about 50 ppm.

17. The method of claim 1, wherein the pH of the ozonated cold water of said second rinse solution is maintained at a range from about 3 to about 6.

18. The method of claim 1, wherein the pH of said first break wash, said second break wash, said first rinse solution, said second rinse solution, and said third rinse solution are maintained in a range of from about 3 to about 13.

19. A method of reducing the soil load on a soiled textile using cold water in a washing machine containing the textile, said washing machine having an outer shell for containing fluids and an internal assembly for containing the textile and fluids, said method comprising:

introducing a first break wash into the outer shell and internal assembly, thus contacting the textile with the first break wash and wetting the textile, said first break wash comprising an organic solvent and cold water;

combining a second break wash with the first break wash in the outer shell and internal assembly, said second break wash comprising cold water, a surfactant, and an alkali;

removing the combined first break wash and second break washes and any associated soil from the internal assembly and the outer shell;

introducing a first rinse solution into the outer shell and internal assembly, thus contacting the textile with said first rinse solution, said first rinse solution comprising cold water;

removing the first rinse solution and any associated soil from the internal assembly and the outer shell;

introducing a suds wash into the outer shell and internal assembly, said suds wash comprising a surfactant, a solvent, an acid, and a suspending agent;

removing the suds wash and any associated soil from the internal assembly and the outer shell;

introducing a second rinse solution into the outer shell and internal assembly, said second rinse solution comprising ozonated cold water and an acid;

removing the second rinse solution and any associated soil from the internal assembly and the outer shell;

introducing a third rinse solution into the outer shell and internal assembly, said third rinse solution comprising ozonated cold water;

removing the third rinse solution and any associated soil from the internal assembly and the outer shell; and

introducing a fourth rinse solution into the outer shell and internal assembly, said fourth rinse solution comprising cold water, thereby reducing the soil load on the textile.

20. The method of claim 19, wherein the suspending agent of the suds wash is selected from the group consisting of carboxymethyl cellulose, sodium metasilicate, and mixtures thereof.