Method for packaging sponge or porous polymeric products

• US 6,176,067 B1
• Filed: 03/24/1999
• Issued: 01/23/2001
• Est. Priority Date: 03/27/1998
• Status: Expired due to Fees

• Current Assignee: Illinois Tool Works Inc.
• Original Assignee: Rippey Corp. (Illinois Tool Works Inc.)
• Inventors: Bahten, Kristan G.
• Primary Examiner(s): Vo, Peter
• Assistant Examiner(s): Huynh, Louis K.
• Application Number:
  US09/275,735
• Time in Patent Office: 671 Days
• Field of Search: 534/28, 534/31, 534/77, 534/69, 206/361, 206/209, 206/207, 206/224.1, 206/224.6, 815/8, 151/049.3
• US Class Current: 53/428
• CPC Class Codes: B08B 3/08 the liquid having chemical or dissolving effect substances used, see the relevant classes

Abstract

The present invention provides a novel method (400) for packaging sponge or porous polymeric devices, e.g., scrubbing brush. The method includes a step of providing a porous polymeric member (401), which has an outer surface and may also include inner surfaces. The member is substantially free from impurities (e.g., ions, particles) that may be distributed on the surface and through the member. Preferably, the method treats the devices using a preservative to prevent bacteria growth during storage or shipping of the devices. The brushes are removed from the wash treatment and placed within containment packages.

Claims

1. A method for packaging a porous polymeric member in a containment package, the method comprising:

providing a porous polymeric members the member comprising an outer surface and a plurality of impurities distributed through the member;

subjecting the porous polymeric member to a wash cycle, the wash cycle comprising at least two sequential and different treatments selected from the group of an acid treatment, a base treatment, or a solvent treatment;

providing a containment package; and

positioning the porous polymeric member within the containment package;

wherein the porous polymeric member comprises a shape selected from the group consisting of a brush, a puck, a pad, or a plug.

2. The method of claim 1 wherein the acid treatment comprises removing a portion of a trace metal from the porous polymeric member;

the base treatment comprises removing a charged particle from the porous polymeric member; and

the solvent treatment comprises removing a loose portion of the porous polymeric member from the porous polymeric member.

3. The packaging method of claim 1, wherein the wash cycle is performed by rotating the porous polymeric member.

4. The packaging method of claim 1, wherein the acid treatment comprises an HCl bearing compound.

5. The packaging method of claim 1, wherein the base treatment comprises an NH₃OH bearing compound.

6. The packaging method of claim 1, wherein the solvent treatment comprises an alcohol bearing compound.

7. The packaging method of claim 1, wherein the method further comprises removing the porous polymeric member from the wash within a cleanroom.

8. The method of claim 1, wherein the method further comprises heat-sealing the containment package such that the porous polymeric member is sealed within the containment package.

9. The packaging method of claim 8, wherein the method further comprises heat-sealing the containment package within a cleanroom.

10. The method of claim 1, wherein the method further comprises providing an amount of preservative within the containment package.

11. The method of claim 10, wherein the method further comprises heat-sealing the containment package such that the porous polymeric member and the preservative are sealed together inside the containment package.

12. The method of claim 11, wherein the method further comprises heat-sealing the containment package within a cleanroom.

13. The method of claim 1, wherein the containment package is a class 10 clear polymer bag.

14. The method of claim 1 wherein the porous polymeric member is selected from a material including polyvinyl acetal porous elastic material.

15. The method of claim 1 further comprising a step of subjecting the porous polymeric member to a chelating compound.

16. The method of claim 1 wherein member has a sodium concentration level of less than 0.10 parts per million after the subjecting the step of subjecting the porous polymeric member to a wash results in a sodium concentration of less than 0.10 parts per million in the porous polymeric member.

17. A method for packaging a porous polymeric member in a containment package, the method comprising:

providing a porous polymeric member, the member comprising an outer surface and a plurality of impurities distributed through the member, said impurities less than about 0.20 parts per million;

subjecting said porous polymeric member to a preservative, said preservative preventing microorganisms from growing on surfaces of said porous polymeric member;

positioning the porous polymeric member within a containment package while in a cleanroom environment; and

sealing said containment package in the cleanroom environment.

18. The method of claim 17 wherein said preservative comprises an ammonium bearing compound.

19. The method of claim 17 wherein said preservative comprises an ammonium hydroxide compound.

20. The method of claim 17 wherein the method further comprises heat-sealing the containment package such that the porous polymeric member is sealed within the containment package.

21. The method of claim 17, wherein the method further comprises providing an amount of the preservative within the containment package.

22. The method of claim 17, wherein the containment package is a class 10 clear polymer bag.

23. The method of claim 17 wherein the porous polymeric member is selected from a material including polyvinyl acetal porous elastic material.

24. The method of claim 17 wherein the porous polymeric member has a sodium concentration level of less than 0.10 parts per million prior to the packaging step.

25. The method of claim 17 wherein a shape of the porous polymeric member is selected from the group consisting of a brush, a puck, a pad, or a plug.