Compressible and strong fibrous structures

Patent metadata

Field	Value
Publication number	US-11292228-B2
Application number	US-201715786010-A
Country	US
Kind code	B2
Filing date	Oct 17, 2017
Priority date	Oct 17, 2016
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

Articles, such as sanitary tissue products, comprising fibrous structures, and more particularly articles comprising fibrous structures comprising a plurality of fibrous elements wherein the articles exhibit improved consumer relevant properties, for example improved bulk and absorbent properties, compared to known articles and methods for making same are provided.

First claim

What is claimed is:

1. A multi-ply fibrous structure comprising:
a. a first ply comprising: a plurality of wood pulp fibers and a plurality of thermoplastic meltblown filaments selected from the group consisting of polyester thermoplastic meltblown filaments, nylon thermoplastic meltblown filaments, polyolefin thermoplastic meltblown filaments, biodegradable thermoplastic meltblown filaments, compostable thermoplastic meltblown filaments, and mixtures thereof, wherein the plurality of thermoplastic meltblown filaments exhibit a length of greater than or equal to 5.08 cm, wherein a first portion of the plurality of wood pulp fibers are in the form of a first wet laid fibrous structure and a second portion of the plurality of wood pulp fibers are commingled together with a portion of the thermoplastic meltblown filaments in the form of a coform fibrous structure; and
b. a second ply comprising a second wet laid fibrous structure comprising a plurality of wood pulp fibers, wherein the portion of the thermoplastic meltblown filaments in the form of the coform fibrous structure of the first ply are spun from a die and directly laid on top of the second wet laid fibrous structure such that the multi-ply fibrous structure exhibits a Dry Burst Energy Absorption of greater than 20.0 (g-in/in 2 ) as measured according to the Dry Burst Test Method and a Dry Thick Compression of greater than 700 mils*mils/log (gr force/in 2 ) as measured according to the Dry Compressive Modulus Test Method.

2. The multi-ply fibrous structure according to claim 1 wherein at least one of the plurality of thermoplastic meltblown filaments is selected from the group consisting of polyolefin thermoplastic meltblown filaments, polylactic acid thermoplastic meltblown filaments, polyhydroxyalkanoate thermoplastic meltblown filaments, polyesteramide thermoplastic meltblown filaments, polycaprolactone thermoplastic meltblown filaments, and mixtures thereof.

3. The multi-ply fibrous structure according to claim 2 wherein the thermoplastic polymer is a polyolefin selected from the group consisting of: polypropylene, polyethylene, and mixtures thereof.

4. The multi-ply fibrous structure according to claim 1 wherein the multi-ply fibrous structure further exhibits a Bending Modulus of less than 10.00 [(mg*cm·g)/mils 3 ] as measured according to the Flexural Rigidity and Bending Modulus Test Method.

5. The multi-ply fibrous structure according to claim 1 wherein the multi-ply fibrous structure further exhibits a TS7 of less than 17.0 dB V 2 rms as measured according to the Emtec Test Method.

6. The multi-ply fibrous structure according to claim 1 wherein at least one of the plurality of thermoplastic meltblown filaments is selected from the group consisting of biodegradable thermoplastic meltblown filaments, compostable thermoplastic meltblown filaments and mixtures thereof.

7. The multi-ply fibrous structure according to claim 1 wherein at least one of the plurality of thermoplastic meltblown filaments is selected from the group consisting of polylactic acid thermoplastic meltblown filaments, polyhydroxyalkanoate thermoplastic meltblown filaments, polyesteramide thermoplastic meltblown filaments, polycaprolactone thermoplastic meltblown filaments, and mixtures thereof.

8. The multi-ply fibrous structure according to claim 1 wherein at least one of the plurality of thermoplastic meltblown filaments is a polylactic acid thermoplastic meltblown filament.

9. The multi-ply fibrous structure according to claim 1 wherein at least one of the plurality of thermoplastic meltblown filaments is a polyhydroxyalkanoate thermoplastic meltblown filament.

Assignees

• Procter & Gamble

Inventors

• Young Christopher Michael
• Stelljes Michael Gomer
• Suer Michael Donald
• Klawitter Timothy James
• Denbow James Roy
• Barnholtz Steven Lee
• Sheehan Jeffrey Glen
• Trokhan Paul Dennis

Classifications

• D21H27/002 Primary

  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

• D21H27/02

  Patterned paper (patterned coatings D21H19/66; embossing B31F1/07; prepared on the paper-making machines D21F11/00) · CPC title

• B32B5/26

  another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)} · CPC title

• D01D5/18

  by means of rotating spinnerets · CPC title

• B32B27/12

  next to a fibrous or filamentary layer · CPC title