Multi-ply fibrous structures and methods for making same

• US 8,753,737 B2
• Filed: 05/19/2009
• Issued: 06/17/2014
• Est. Priority Date: 05/19/2009
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: McNeil, Kevin Benson, Buschur, Patrick John, Mellin, Andre, Byrne, Thomas Timothy, Conroy, Mark Stephen
• Primary Examiner(s): Loney, Donald J
• Application Number:
  US12/468,394
• Publication Number:
  US 20100297377A1
• Time in Patent Office: 1,855 Days
• Field of Search: 428/154, 428/166, 428/172, 428/198, 428/211.1, 162/109, 162/113
• US Class Current: 428/166
• CPC Class Codes: B32B 2250/20 All layers being fibrous or filamentary
• CPC Class Codes: B32B 2250/26 All layers being made of paper or paperboard
• CPC Class Codes: B32B 2262/0223 Vinyl resin fibres
• CPC Class Codes: B32B 2262/0253 Polyolefin fibres vinyl or acrylic copolymers B32B2262/0223 or B32B2262/0246
• CPC Class Codes: B32B 2262/0261 Polyamide fibres
• CPC Class Codes: B32B 2262/0276 Polyester fibres
• CPC Class Codes: B32B 2262/04 Cellulosic plastic fibres, e.g. rayon
• CPC Class Codes: B32B 2262/06 Vegetal fibres
• CPC Class Codes: B32B 2262/12 Conjugate fibres, e.g. core/sheath or side-by-side
• CPC Class Codes: B32B 2307/54 Yield strength; Tensile strength
• CPC Class Codes: B32B 2307/718 Weight, e.g. weight per square meter
• CPC Class Codes: B32B 2307/72 Density
• CPC Class Codes: B32B 2555/00 Personal care
• CPC Class Codes: B32B 29/005 next to another layer of paper or cardboard layer
• CPC Class Codes: B32B 29/06 specially treated, e.g. surfaced, parchmentised
• CPC Class Codes: B32B 37/30 Partial laminating
• CPC Class Codes: B32B 5/02 characterised by structural features of a fibrous or filamentary layer layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02
• CPC Class Codes: B32B 5/08 the fibres or filaments of a layer being of different substances , e.g. conjugate fibres, mixture of different fibres
• CPC Class Codes: B32B 5/22 characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed layer formed of natural mineral fibres or particles next to a foam layer B32B19/047, next to a layer made of particles B32B19/048, or next to a fibrous or filamentary layer B32B19/06; paper layer or cardboard layer next to a paper layer or cardboard layer B32B29/005, next to a foam layer B32B29/007, next to a fibrous or filamentary layer B32B29/02, or next to a particulate layer B32B29/04
• CPC Class Codes: B32B 5/26 another layer next to it also being fibrous or filamentary relative arrangement of fibres or filaments of different layers B32B5/12
• CPC Class Codes: B32B 7/14 : applied in spaced arrangements, e.g. in stripes
• CPC Class Codes: D21H 27/004 : characterised by specific parameters D21H27/008 takes precedence
• CPC Class Codes: D21H 27/02 : Patterned paper patterned coatings D21H19/66; embossing B31F1/07; prepared on the paper-making machines D21F11/00
• CPC Class Codes: D21H 27/30 : Multi-ply for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00
• CPC Class Codes: D21H 27/40 : at least one of the sheets being non-planar, e.g. crêped crêping or corrugating paper B31F
• CPC Class Codes: Y10T 428/15 : Sheet, web, or layer weakened to permit separation through thickness
• CPC Class Codes: Y10T 428/24463 : Plural paper components
• CPC Class Codes: Y10T 428/24562 : Interlaminar spaces
• CPC Class Codes: Y10T 428/24612 : Composite web or sheet
• CPC Class Codes: Y10T 428/24826 : Spot bonds connect components

Abstract

Embossed multi-ply fibrous structures and methods for making such embossed multi-ply fibrous structures are provided.

Claims

1. An embossed multi-ply fibrous structure comprising 10% or less total embossed area, wherein two or more plies of the embossed multi-ply fibrous structure are adhesively bonded together in a face-to-face relationship such that the embossed multi-ply fibrous structure comprises a maximum unbonded area of less than 51 mm×

22 mm as determined by the Maximum Unbonded Area Test Method wherein the embossed multi-ply fibrous structure comprises at least one embossment that is void of adhesive and wherein the embossed multi-ply fibrous structure comprises at least one line embossment comprising at least one discrete region of adhesive that covers less than the entire surface area of the line embossment.

2. The embossed multi-ply fibrous structure according to claim 1 wherein the maximum unbonded area is oriented in the machine direction.

3. The embossed multi-ply fibrous structure according to claim 1 wherein the maximum unbonded area is oriented in the cross machine direction.

4. The embossed multi-ply fibrous structure according to claim 1 wherein the maximum unbonded area is located immediately adjacent to an edge of the embossed multi-ply fibrous structure.

5. The embossed multi-ply fibrous structure according to claim 1 wherein the embossed multi-ply fibrous structure comprises one or more transverse lines of weakness.

6. The embossed multi-ply fibrous structure according to claim 5 wherein the maximum unbonded area is located immediately adjacent to at least one of the transverse lines of weakness.

7. The embossed multi-ply fibrous structure according to claim 1 wherein the discrete region of adhesive is positioned between the line element embossment'"'"'s termini.

8. The embossed multi-ply fibrous structure according to claim 1 wherein the line element embossment comprises two discrete regions of adhesive that are positioned at the line element embossment'"'"'s termini.

9. The embossed multi-ply fibrous structure according to claim 8 wherein the line element embossment comprises at least one discrete region of adhesive positioned between the two discrete regions of adhesive.

10. The embossed multi-ply fibrous structure according to claim 1 wherein the line element embossment comprises at least two discrete regions of adhesive.

11. The embossed multi-ply fibrous structure according to claim 10 wherein the two discrete regions of adhesive are spaced 10 mm or less apart from each other.

12. The embossed multi-ply fibrous structure according to claim 1 wherein the line element embossment exhibits a length of greater than 5 mm.

13. The embossed multi-ply fibrous structure according to claim 1 wherein the embossed multi-ply fibrous structure comprises a plurality of line element embossments wherein at least 50% of the line element embossments exhibit a length of greater than 5 mm.

14. The embossed multi-ply fibrous structure according to claim 1 wherein the embossed multi-ply fibrous structure comprises at least one dot embossment.

15. The embossed multi-ply fibrous structure according to claim 14 wherein the dot embossment comprises at least one discrete region of adhesive that covers less that the entire surface area of the dot embossment.

16. The embossed multi-ply fibrous structure according to claim 1 wherein at least 0.2% of the total embossed area comprises line element embossments and at least 0.2% of the total embossed area comprises dot embossments.

17. The embossed multi-ply fibrous structure according to claim 16 wherein the ratio of line element embossment area to dot embossment area is greater than 1.

18. The embossed multi-ply fibrous structure according to claim 1 wherein the fibrous structure is in the form of a convolutely wound roll comprising transverse lines of weakness that segment the fibrous structure into separable units.

19. The embossed multi-ply fibrous structure according to claim 1 wherein the embossed multi-ply fibrous structure exhibits a ratio of plybond strength to plybond area of the embossed multi-ply fibrous structure of greater than 100 g/in/% plybond area.

20. An embossed multi-ply fibrous structure comprising 10% or less total embossed area, wherein two or more plies of the embossed multi-ply fibrous structure are bonded together in a face-to-face relationship such that the embossed multi-ply fibrous structure comprises a maximum unbonded area of less than 34 mm×

34 mm as determined by the Maximum Unbonded Area Test Method wherein the embossed multi-ply fibrous structure comprises at least one embossment that is void of adhesive and wherein the embossed multi-ply fibrous structure comprises at least one line embossment comprising at least one discrete region of adhesive that covers less than the entire surface area of the line embossment.