Environmentally sustainable multiple ply paper product

• US 7,927,457 B2
• Filed: 10/30/2009
• Issued: 04/19/2011
• Est. Priority Date: 12/15/2006
• Status: Expired due to Fees

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Kruchoski, Benjamin Joseph, Shannon, Thomas Gerard
• Primary Examiner(s): Halpern; Mark
• Application Number:
  US12/609,108
• Publication Number:
  US 20100043989A1
• Time in Patent Office: 536 Days
• Field of Search: 162/112, 162/129, 162/123, 162/147, 428/153
• US Class Current: 162/129
• CPC Class Codes: D21H 11/14 Secondary fibres working-up waste paper D21C5/02
• CPC Class Codes: D21H 27/002 Tissue paper; Absorbent paper D21H21/22, D21H27/02, D21H27/20 take precedence; toilet paper A47K10/00; absorbent pads for physiological fluids A61L15/16; making on paper-making machines D21F11/00
• CPC Class Codes: D21H 27/38 at least one of the sheets having a fibrous composition differing from that of other sheets
• CPC Class Codes: Y10T 428/24455 Paper

Abstract

The present disclosure is generally directed to a multiple ply paper product which includes a first ply comprising virgin fiber, pre-consumer recycled fiber, or mixtures thereof and a second ply comprising at least about 30% by weight post-consumer recycled fiber, wherein the average pore size distribution of the first ply is greater than the average pore size distribution of the second ply.

Claims

1. A multiple ply paper product comprising:

a first ply comprising virgin fiber, pre-consumer recycled fiber, or mixtures thereof; and

a second ply comprising at least about 30% by weight post-consumer recycled fiber,

wherein the average pore size distribution of said first ply is greater than the average pore size distribution of said second ply.

2. A multiple ply paper product as in claim 1, wherein said second ply comprises at least about 50% by weight post-consumer recycled fiber.

3. A multiple ply paper product as in claim 1, wherein said second ply comprises at least about 80% by weight post-consumer recycled fiber.

4. A multiple ply paper product as in claim 1, wherein said second ply comprises 100% by weight post consumer recycled fiber.

5. A multiple ply paper product as in claim 1, wherein said first ply comprises at least about 50% by weight pre-consumer recycled fiber.

6. A multiple ply paper product as in claim 1, wherein said second ply has an average absorbent capacity of from about 1 g/g to about 7 g/g.

7. A multiple ply paper product as in claim 1, wherein said second ply has an average absorbent capacity of from about 2 g/g to about 5 g/g.

8. A multiple ply paper product as in claim 1, wherein said first ply has an average absorbent capacity of from about 6 g/g to about 9 g/g.

9. A multiple ply paper product as in claim 1, wherein said second ply has an average absorbent capacity of from about 7 g/g to about 8 g/g.

10. A multiple ply paper product as in claim 1, further comprising a third ply comprising virgin fiber, pre-consumer recycled fiber, or mixtures thereof.

11. A multiple ply paper product as in claim 10, wherein said third ply is located between said first ply and said second ply.

12. A multiple ply product as in claim 1 wherein said first ply comprises a through air dried sheet of 100% virgin fiber.

13. A multiple product as in claim 12 wherein said second ply comprises a creped wet pressed sheet.

14. A multiple product as in claim 1 wherein the basis weight of said first ply is from about 90% to about 40% of the basis weight of said second ply.

15. A process for producing a multiple ply paper product comprising:

forming a first ply paper web comprising at least about 30% by weight post-consumer recycled fiber; and

joining said first ply paper web to a second ply paper web comprising virgin fiber, pie-consumer recycled fiber, or mixtures thereof, wherein the average pore size distribution of said first ply is greater than the average pore size distribution of said second ply.

16. A process as in claim 15, further comprising joining said first ply paper web to a third ply paper web comprising virgin fiber, pre-consumer recycled fiber, or mixtures thereof, wherein the average pore size distribution of said first ply is greater than the average pore size distribution of said third ply.

17. A process as in claim 15, wherein said second ply comprises at least about 50% by weight post-consumer recycled fiber.

18. A process as in claim 15, wherein said first ply is laminated to said second ply.

19. A process as in claim 15, wherein said first ply is crimped to said second ply.