Method for making multi-ply fibrous structures

Patent metadata

Field	Value
Publication number	US-9937694-B2
Application number	US-201414268182-A
Country	US
Kind code	B2
Filing date	May 2, 2014
Priority date	May 19, 2009
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

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

First claim

What is claimed is:

1. A method for making an embossed multi-ply fibrous structure, the method comprises the steps of:
a. providing a first ply of an embossed fibrous structure comprising at least one embossment;
b. providing a second ply of a fibrous structure;
c. applying an adhesive to at least one of the plies; and
d. adhesively bonding the two plies together in a face-to-face relationship such that 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, is produced,
wherein the embossed multi-ply fibrous structure comprises multiple line element embossments, at least one line element embossment having at least one discrete region that is void of adhesive and at least one line element embossment comprising at least one discrete region of adhesive that covers less than the entire surface area of the line element embossments, and wherein at least 50% of the multiple line element embossments have a length greater than 5 mm.

2. The method according to claim 1 wherein the maximum unbonded area is oriented in the machine direction.

3. The method according to claim 1 wherein the maximum unbonded area is oriented in the cross machine direction.

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

6. The method 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 method according to claim 1 wherein the discrete region of adhesive is positioned between the line element embossment's termini.

8. The method 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 method 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 method according to claim 1 wherein the line element embossment comprises at least two discrete regions of adhesive.

11. The method according to claim 10 wherein the two discrete regions of adhesive are spaced 10 mm or less apart from each other.

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

13. The method according to claim 12 wherein the dot embossment comprises at least one discrete region of adhesive that covers less that the entire surface area of the dot embossment.

14. The method 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.

15. The method according to claim 14 wherein the ratio of line element embossment area to dot embossment area is greater than 1.

16. The method 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.

17. The method 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.

Assignees

• Procter & Gamble

Inventors

• Mcneil Kevin Benson
• Buschur Patrick John
• Mellin Andre
• Byrne Thomas Timothy
• Conroy Mark Stephen

Classifications

• B32B2250/26

  All layers being made of paper or paperboard · CPC title

• B32B7/14

  applied in spaced arrangements, e.g. in stripes · CPC title

• B32B2262/04

  Cellulosic plastic fibres, e.g. rayon · CPC title

• Y10T428/24826

  Spot bonds connect components · CPC title

• Y10T428/24463

  Plural paper components · CPC title