Methods of Making Two-Sided Cloth Like Webs

• US 20090065160A1
• Filed: 08/08/2008
• Published: 03/12/2009
• Est. Priority Date: 12/31/2003
• Status: Active Grant

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Hermans, Michael Alan, Lindsay, Jeffrey Dean, Tirimacco, Maurizio, Goulet, Mike T., Mohr, Rebecca C., Hassman, Mark, Johnson, Jeffrey J.
• Granted Patent: US 7,662,256 B2
• Time in Patent Office: Days
• US Class Current: 162/112
• CPC Class Codes: D21H 27/005 relating to physical or mechanical properties, e.g. tensile strength, stretch, softness
• CPC Class Codes: D21H 27/008 characterised by inhomogeneous distribution or incomplete coverage of properties, e.g. obtained by using materials of chemical compounds D21H23/02, D21H23/76, D21H27/02 take precedence
• 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 428/24479 including variation in thickness
• CPC Class Codes: Y10T 428/24612 Composite web or sheet
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/249924 Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
• CPC Class Codes: Y10T 442/60 Nonwoven fabric [i.e., nonwoven strand or fiber material]

Abstract

The present invention is generally directed to paper products having great softness and strength and methods of making the paper products. The paper products are formed from one or more paper webs that can be made according to various methods. In one embodiment, the paper web is an uncreped through-air dried web. According to the present invention, at least one side of the paper web is treated with a bonding material according to a preselected pattern and creped from a creping surface. Through the process, a two-sided tissue web is formed having a smooth side and a textured side.

Claims

1. A method of making a tissue product comprising:

applying a first bonding material to a first side of an uncreped tissue web according to a first preselected pattern, wherein the uncreped tissue web comprises pulp fibers;

creping the first side of the tissue web after application of the first bonding material; and

applying a second bonding material to a second side of the tissue web according to a second preselected pattern, wherein the second bonding material is applied to a greater amount of surface area than the first bonding material covers on the first side of the tissue web, and further wherein the first bonding material applied to the first side of the tissue web has greater penetration into the web than the second bonding material applied to the second side of the tissue web.

2. A method as in claim 1, wherein the characteristics of the first side of the tissue web are different than the characteristics of the second side of the tissue web, the first side of the tissue web having a dry surface depth of less than about 0.15 mm and a wetted surface depth of greater than about 0.2 mm, the second side of the tissue web having a dry surface depth of greater than about 0.2 mm.

3. A method as in claim 1, wherein the uncreped tissue web comprises an uncreped through-air dried web.

4. A method as in claim 1, wherein the first bonding material comprises an ethylene vinyl acetate copolymer.

5. A method as in claim 1, wherein the first bonding material comprises a styrene-butadiene copolymer, a polyvinyl acetate polymer, a vinyl-acetate acrylic copolymer, an ethylene-vinyl chloride copolymer, an ethylene-vinyl chloride-vinyl acetate polymer, an acrylic polyvinyl chloride polymer, an acrylic polymer, or a nitrile polymer.

6. A method as in claim 1, wherein the first bonding material and the second bonding material are applied to the first side and the second side, respectively, prior to creping the first side of the tissue web.

7. A method as in claim 1, wherein the uncreped tissue web has a basis weight of from about 10 gsm to about 120 gsm.

8. A method as in claim 1, wherein the first bonding material is applied to the first side of the tissue web in an amount of from about 2% to about 10% by weight of the web.

9. A method as in claim 1, wherein the first bonding material is applied to the first side of the tissue web so as to cover at least 50% of the surface area of the first side of the web.

10. A method as in claim 1, wherein the preselected pattern by which the first bonding material is applied comprises a succession of discrete shapes.

11. A method as in claim 1, wherein the uncreped tissue product has a bulk greater than 10 cc/g.

12. A method as in claim 3, wherein the uncreped tissue web includes an air side and a fabric side, the first side of the tissue web being the air side of the web.

13. A method as in claim 1, wherein the second side of the tissue web remains uncreped.

14. A method as in claim 13, wherein the second preselected pattern by which the second bonding material is applied to the second side of the tissue web comprises a succession of discrete shapes that are each comprised of three elongated hexagons.

15. A method as in claim 13, wherein the second bonding material comprises a strength agent.

16. A method as in claim 13, wherein the second bonding material comprises a debonding agent.

17. A method as in claim 15 further comprising

making the uncreped tissue web from a stratified fiber furnish including a first outer layer and a second outer layer, wherein the strength agent is incorporated into the second outer layer, and wherein the second outer layer forming the second side of the tissue web.

18. A method as in claim 17, wherein the strength agent is coated, sprayed or printed onto the second outer layer.

19. A method as in claim 1, wherein the first bonding material is applied to a first side of an uncreped tissue web utilizing a transfer roll in contact with a rotogravure roll.

20. A method as in claim 19, wherein the rotogravure roll is in communication with a reservoir containing the first bonding material.