Fibrous Structures and Methods for Making Same

Patent metadata

Field	Value
Publication number	US-2016355984-A1
Application number	US-201615243140-A
Country	US
Kind code	A1
Filing date	Aug 22, 2016
Priority date	Nov 2, 2009
Publication date	Dec 8, 2016
Grant date	—

Abstract

Fibrous structures that exhibit a pore volume distribution such that at least 25% and/or at least 43% of the total pore volume present in the fibrous structures exists in pores of radii of from 91 μm to 140 μm, and to methods for making such fibrous structures are provided.

First claim

What is claimed is:

1 . A method for making a fibrous wherein the method comprises the step of combining a plurality of filaments to form a fibrous structure that exhibits a pore volume distribution such that at least 43% of the total pore volume present in the fibrous structure exists in pores of radii of from 91 μm to 140 μm.

2 . The method according to claim 1 wherein the fibrous structure exhibits a pore volume distribution such that at least 45% of the total pore volume present in the fibrous structure exists in pores of radii of from 91 μm to 140 μm.

3 . The method according to claim 1 wherein the step of combining a plurality of filaments further comprises combining a plurality of solid additives with the filaments.

4 . The method according to claim 3 wherein at least one of the solid additives comprises a fiber.

5 . The method according to claim 4 wherein the fiber comprises a wood pulp fiber.

6 . The method according to claim 5 wherein the wood pulp fiber is selected from the group consisting of: Southern Softwood Kraft pulp fibers, Northern Softwood Kraft pulp fibers, Eucalyptus pulp fibers, Acacia pulp fibers.

7 . The method according to claim 1 wherein at least one of the plurality of filaments comprises a thermoplastic polymer.

8 . The method according to claim 7 wherein the thermoplastic polymer comprises a polyolefin.

9 . The method according to claim 8 wherein the polyolefin is selected from the group consisting of: polypropylene, polyethylene, and mixtures thereof.

10 . The method according to claim 9 wherein the polyolefin comprises polypropylene.

11 . The fibrous structure according to claim 7 wherein the thermoplastic polymer is selected from the group consisting of: polypropylene, polyethylene, polyester, polylactic acid, polyhydroxyalkanoate, polyvinyl alcohol, polycaprolactone and mixtures thereof.

12 . The method according to claim 1 wherein at least one of the plurality of filaments comprises a natural polymer.

13 . The method according to claim 12 wherein the natural polymer is selected from the group consisting of: starch, starch derivatives, cellulose, cellulose derivatives, hemicellulose, hemicellulose derivatives and mixtures thereof.

14 . The method according to claim 1 wherein the method further comprises the step of calendering the fibrous structure.

15 . The method according to claim 1 wherein the method further comprises the step of depositing the filaments onto a patterned belt that creates a non-random, repeating pattern of microregions.

16 . The method according to claim 1 wherein the method further comprises the step of depositing a second layer of filaments onto a surface of the fibrous structure.

17 . The method according to claim 1 wherein the fibrous structure comprises at least a bi-modal pore volume distribution.

18 . The method according to claim 17 wherein at least 2% of the total pore volume present in the fibrous structure exists in pores of radii of less than about 100 μm.

19 . The method according to claim 1 wherein the fibrous structure exhibits a VFS of at least 5 g/g.

20 . The method according to claim 1 wherein the method further comprises the step of convolutedly winding the fibrous structure upon itself to form of a roll.

Assignees

• Procter & Gamble

Inventors

• Barnholtz Steven Lee
• Trokhan Paul Dennis
• Barkey Donald Jay
• Young Christopher Michael
• Suer Michael Donald

Classifications

• D04H1/56

  in association with fibre formation, e.g. immediately following extrusion of staple fibres · CPC title

• Y10T428/24479

  including variation in thickness · CPC title

• D21H17/34

  obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• D21H27/002

  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 title

• D21H11/00

  Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only · CPC title