Substrate containing a deodorizing ink

• US 7,531,471 B2
• Filed: 01/30/2007
• Issued: 05/12/2009
• Est. Priority Date: 01/30/2007
• Status: Active Grant

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Quincy, Roger B. III
• Primary Examiner(s): Salvatore; Lynda
• Application Number:
  US11/700,239
• Publication Number:
  US 20080179562A1
• Time in Patent Office: 833 Days
• Field of Search: 442/375, 428/143, 428/220, 428/317.9, 428/318.4, 523/102
• US Class Current: 442/375
• CPC Class Codes: A61F 13/8405 Additives, e.g. for odour, disinfectant or pH control
• CPC Class Codes: A61F 2013/842 with active charcoal
• CPC Class Codes: A61L 15/18 containing inorganic materials
• CPC Class Codes: A61L 15/46 Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
• CPC Class Codes: A61L 2300/108 Elemental carbon, e.g. charcoal
• CPC Class Codes: A61L 2300/622 Microcapsules
• CPC Class Codes: A61L 9/014 containing sorbent material, e.g. activated carbon
• CPC Class Codes: C09D 11/30 Inkjet printing inks
• CPC Class Codes: C09D 11/38 characterised by non-macromolecular additives other than solvents, pigments or dyes
• CPC Class Codes: D06M 23/08 Processes in which the treating agent is applied in powder or granular form adhesives for multi-layer textile fabrics D06M17/00
• CPC Class Codes: D06M 23/12 Processes in which the treating agent is incorporated in microcapsules making microcapsules B01J13/02
• CPC Class Codes: Y10T 442/653 Including particulate material other than fiber

Abstract

A substrate that contains a deodorizing ink is provided. The composition contains carbonaceous particles (e.g., activated carbon) for adsorbing one or more malodorous compounds to reduce odor. Because carbonaceous particles typically have a dark black color that is sometimes aesthetically displeasing to the user, the deodorizing ink of the present invention also contains voided synthetic particles that mask, at least to some extent, the darker carbonaceous particles. More specifically, the voids of the particles contain air, which can scatter or diffract light to create an opaque effect that may hide the black color of the carbonaceous particles. In this manner, the color presented to the user may be more aesthetically pleasing.

Claims

1. A substrate that contains a deodorizing ink, the deodorizing ink comprising from about 10 wt. % to about 50 wt. % carbonaceous particles and from about 5 wt. % to about 40 wt. % voided synthetic particles, wherein the voided synthetic particles have an average size less than the average size of the carbonaceous particles.

2. The substrate of claim 1, wherein the average size of the carbonaceous particles is from about 1 to about 100 micrometers.

3. The substrate of claim 1, wherein the average size of the carbonaceous particles is from about 5 to about 75 micrometers.

4. The substrate of claim 1, wherein the carbonaceous particles constitute from about 15 wt. % to about 45 wt. % of the ink.

5. The substrate of claim 1, wherein the average size of the voided synthetic particles is about 10 micrometers or less.

6. The substrate of claim 1, wherein the average size of the voided synthetic particles is about 1 micrometer or less.

7. The substrate of claim 1, wherein the voided synthetic particles constitute from about 10 wt. % to about 35 wt. % of the ink.

8. The substrate of claim 1, wherein the voided synthetic particles have a void fraction of from about 10% to about 75%.

9. The substrate of claim 1, wherein the voided synthetic particles are formed from a latex polymer.

10. The substrate of claim 9, wherein the latex polymer includes a styrene-acrylic copolymer.

11. The substrate of claim 1, wherein the voided synthetic particles are formed from a core polymer and a shell polymer.

12. The substrate of claim 11, wherein the shell polymer is formed from a nonionic monoethylenically unsaturated monomer, a monoethylenically unsaturated monomer containing acid functionality, or a combination thereof.

13. The substrate of claim 11, wherein the shell polymer includes a styrene-acrylic acid copolymer.

14. The substrate of claim 1, wherein the deodorizing ink further comprises a nonionic cellulosic ether.

15. The substrate of claim 14, wherein the nonionic cellulosic ether includes an alkyl hydroxyalkyl cellulose ether.

16. The substrate of claim 14, wherein the nonionic cellulosic ether comprises from about 1 wt. % to about 35 wt. % of the deodorizing ink.

17. The substrate of claim 1, wherein the solids add-on level of the ink is from about 10% to about 500%.

18. The substrate of claim 1, wherein the deodorizing ink further comprises a colorant.

19. The substrate of claim 1, wherein the substrate contains a nonwoven web, film, or a combination thereof.

20. A personal care absorbent article that comprises the substrate of claim 1.

21. A nonwoven web that contains a deodorizing ink, the deodorizing ink comprising from about 10 wt. % to about 50 wt. % activated carbon particles and from about 5 wt. % to about 40 wt. % voided latex particles, wherein the carbonaceous particles have an average size of from about 5 to about 75 micrometers and the voided latex particles have an average size of about 5 micrometers or less.

22. The nonwoven web of claim 21, wherein the carbonaceous particles constitute from about 15 wt. % to about 45 wt. % of the ink.

23. The nonwoven web of claim 21, wherein the average size of the voided latex particles is about 1 micrometer or less.

24. The nonwoven web of claim 21, wherein the voided latex particles constitute from about 10 wt. % to about 35 wt. % of the ink.

25. The nonwoven web of claim 21, wherein the voided latex particles have a void fraction of from about 10% to about 75%.

26. The nonwoven web of claim 21, wherein the voided latex particles are formed from a styrene-acrylic copolymer.

27. The nonwoven web of claim 21, wherein the voided latex particles are formed from a core polymer and a shell polymer.

28. The nonwoven web of claim 27, wherein the shell polymer is formed from a nonionic monoethylenically unsaturated monomer, a monoethylenically unsaturated monomer containing acid functionality, or a combination thereof.

29. The nonwoven web of claim 27, wherein the shell polymer includes a styrene-acrylic acid copolymer.

30. The nonwoven web of claim 21, wherein the deodorizing ink further comprises a nonionic cellulosic ether.

31. The nonwoven web of claim 21, wherein the solids add-on level of the ink is from about 10% to about 500%.

32. The nonwoven web of claim 21, wherein the deodorizing ink further comprises a colorant.