Post-bonded grooved elastic materials

Patent metadata

Field	Value
Publication number	US-9913764-B2
Application number	US-201314132091-A
Country	US
Kind code	B2
Filing date	Dec 18, 2013
Priority date	Dec 18, 2013
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

An elastic nonwoven laminate that contains an elastic film laminated to one or more nonwoven facings is provided. The nonwoven facing contains a conventional polyolefin and can also contain a polyolefin-based plastomer. The laminate is activated by grooving to decouple the nonwoven facing from the elastic film. To reduce fiber-pull out that can result due to activation by grooving, the laminate can be post-bonded at room or elevated temperatures and a specific range of pressures to compact the fibers of the facing and minimize fiber pull-out/fuzziness while not sacrificing the softness, elasticity, and feel of the laminate.

First claim

What is claimed is:

1. An elastic nonwoven laminate having a machine direction and a cross-machine direction, the elastic nonwoven laminate comprising an unstretched elastic film disposed between a first nonwoven facing and a second nonwoven facing, wherein the first nonwoven facing comprises a first polyolefin, wherein the first nonwoven facing is meltblown or spunbond, wherein the first nonwoven facing and the second nonwoven facing are simultaneously grooved in the machine direction or cross-machine direction to decouple the first nonwoven facing and the second nonwoven facing from the elastic film, wherein grooves in the first nonwoven facing correspond with grooves in the second nonwoven facing, and wherein an outer surface of each of the first nonwoven facing and the second nonwoven facing is post-bonded after the first nonwoven facing and the second nonwoven facing are simultaneously grooved such that from about 1 groove per inch to about 12 grooves per inch are present on the outer surface of each of the first nonwoven facing and the second nonwoven facing after post-bonding, wherein the outer surface of each of the first nonwoven facing and the second nonwoven facing are bonded in a pattern comprising bonded areas, wherein bonded areas of the first nonwoven facing and the second nonwoven facing are non-fibrous, wherein the elastic nonwoven laminate has a percent elongation of at least about 200% in the cross-machine direction, wherein the first nonwoven facing and the second nonwoven facing each exhibit reduced fiber pull-out compared to a nonwoven facing that is not post-bonded.

2. The elastic nonwoven laminate of claim 1 , wherein the first polyolefin comprises polyethylene, polypropylene, or a combination thereof.

3. The elastic nonwoven laminate of claim 1 , wherein the first nonwoven facing further comprises a second polyolefin, wherein the second polyolefin comprises an elastomeric semi-crystalline polyolefin.

4. The elastic nonwoven laminate of claim 3 wherein the elastomeric semi-crystalline polyolefin is an ethylene/α-olefin copolymer, propylene/α-olefin copolymer, or a combination thereof.

5. The elastic nonwoven laminate of claim 3 , wherein the first polyolefin is present in an amount ranging from about 50 wt. % to about 99 wt. % and the second polyolefin is present in an amount ranging from about 0.5 wt. % to about 60 wt %, based on the total weight of the first nonwoven facing.

6. The elastic nonwoven laminate of claim 1 , wherein the elastic film comprises a core layer disposed between two skin layers, wherein the core layer is an elastic layer comprising a styrenic block copolymer, an ethylene/α-olefin copolymer, a propylene/α-olefin copolymer, or a combination thereof.

7. The elastic nonwoven laminate of claim 1 , wherein the elastic film comprises a core layer disposed between two skin layers, wherein the core layer is a strength layer, and wherein the two skin layers are elastic layers.

8. The elastic nonwoven laminate of claim 1 , further comprising a frangible layer.

9. The elastic nonwoven laminate of claim 1 , wherein the elastic nonwoven laminate has a percent elongation ranging from 610% to about 1000% in the cross-machine direction.

10. The elastic nonwoven laminate of claim 1 , wherein post-bonding occurs at a temperature ranging from about 175° F. to about 250° F.

Assignees

• Kimberly Clark Co

Inventors

• Thomas Oomman P
• Haynes Bryan D
• Schwalen Jerome J

Classifications

• A61F13/15593

  having elastic ribbons fixed thereto; Devices for applying the ribbons · CPC title

• D04H1/4291

  Olefin series · CPC title

• A61F13/4902 Primary

  characterised by the elastic material · CPC title

• Y10T156/1044

  of parallel stacked sheets only · CPC title

• B29C53/24

  of plates or sheets · CPC title