CD extensible nonwoven composite

Patent metadata

Field	Value
Publication number	US-12371828-B2
Application number	US-202318394340-A
Country	US
Kind code	B2
Filing date	Dec 22, 2023
Priority date	Dec 19, 2014
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

A nonwoven composite that has a dimension in a machine direction and a cross-machine direction is provided. The composite comprises a nonwoven facing positioned adjacent to an elastic film. The nonwoven facing contains a spunbond web that is formed by necking a base spunbond web. The base spunbond web includes a plurality of fibers generally oriented in the machine direction and exhibiting a machine direction tensile strength and cross-machine direction tensile strength. The ratio of the machine direction tensile strength to the cross-machine direction tensile strength is about 4:1 or more.

First claim

What is claimed is:

1. A nonwoven facing having a dimension in a machine direction and a cross-machine direction the nonwoven facing comprising a base necked spunbond web, wherein the base necked spunbond web comprises a reduced cross-machine direction, wherein the base spunbond web has a machine direction tensile strength and cross-machine direction tensile strength, the ratio of the machine direction tensile strength to the cross-machine direction tensile strength being 4:1 or more.

2. The nonwoven facing of claim 1 , wherein the facing exhibits a load loss of 60% or less in the cross-machine direction.

3. The nonwoven facing of claim 1 , wherein the base necked spunbond web is formed from a plurality of fibers, wherein the fibers contain a polymer composition that includes a ductile polymer having a modulus of elasticity of 800 MPa or less as determined in accordance with ASTM D638-10, and optionally a fatty acid derivative.

4. The nonwoven facing of claim 3 , wherein the fibers are bicomponent fibers containing a low modulus component that includes the ductile polymer.

5. The nonwoven facing of claim 3 , wherein the fibers are monocomponent fibers.

6. The nonwoven facing of claim 3 , wherein the ductile polymer is an ethylene polymer.

7. The nonwoven facing of claim 3 , wherein the ductile polymer is a propylene homopolymer.

8. The nonwoven facing of claim 3 , wherein the ductile polymer is a copolymer of propylene and an α-olefin.

9. The nonwoven facing of claim 3 , wherein the polymer composition further contains a propylene homopolymer having a modulus of elasticity of from 800 MPa to 4,000 MPa as determined in accordance with ASTM D638-10.

10. The nonwoven facing of claim 1 , wherein the base necked spunbond web is formed from a plurality of fibers, wherein the fibers are bonded together at multiple bond regions, wherein at least a portion of the bond regions are generally oriented in the machine direction.

11. The nonwoven facing of claim 10 , wherein at least a portion of the bond regions have an aspect ratio of from 2 to 100.

12. The nonwoven facing of claim 1 , wherein an elastic film is positioned adjacent the nonwoven facing, wherein the elastic film contains a semi-crystalline polyolefin, a substantially amorphous block copolymer, or a combination thereof.

13. The nonwoven facing of claim 1 , wherein an elastic film is laminated to the spunbond web at multiple bond regions, wherein at least a portion of the bond regions are generally oriented in the machine direction.

14. The nonwoven facing of claim 13 , wherein at least a portion of the bond regions have an aspect ratio of from 2 to 100.

15. An absorbent article comprising the nonwoven facing of claim 1 .

Assignees

• Kimberly Clark Co

Inventors

• Conrad John H
• Fitts Jr James R

Classifications

• D04H1/593

  to layered webs · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• A61L15/24

  Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof {(A61L15/225 takes precedence)} · CPC title

• A61F2013/49022

  being elastomeric sheet · CPC title

• A61F13/49019

  the elastic means being placed longitudinally, transversely or diagonally over the article · CPC title