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Non-stretch bonded elastic with elastic net

An elastic net and elastic technology, which can be used in household appliances, medical equipment, and other household appliances, and can solve problems such as difficult manufacturing

Active Publication Date: 2019-04-16
KIMBERLY-CLARK WORLDWIDE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Materials that are elastic in the CD direction and do not require turning are desirable for many applications but difficult to manufacture, especially at production speeds

Method used

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  • Non-stretch bonded elastic with elastic net
  • Non-stretch bonded elastic with elastic net
  • Non-stretch bonded elastic with elastic net

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0057] Novel CD-stretchable strand / film elastic laminates with enhanced physical properties can be prepared, including, for example, CD-stretchable elastic mesh materials having the properties listed in Table 1 from Conwed Global Netting Solutions.

[0058] Table 1. Properties of CD-stretchable elastic mesh materials

[0059] base weigh

59

(gsm)

MD strands

～11.5

strand / inch

CD strand count

2.4

strand / inch

MD intensity

8.1

kg / 3”

MD elongation

197

％

CD force @50%

392

g / 3” (7 strands)

CD force @ 100%

520

g / 3” (7 strands)

CD Force @ 200%

833

g / 3” (7 strands)

CD intensity

3.7

kg / 3”(7 strands)

CD elongation

718

％

[0060] The CD strands are polymers based on KRATON Styrenic Block Copolymer (SBC), and the MD strands are plastic polyolefins (based on PE). The CD and MD strands had approximately the same basis weight at about 30 gsm. The ulti...

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Abstract

A laminate having a cross-machine direction (CD) and a machine direction (MD) includes a core structure having a first surface and a second surface, an elastic net that is elastic in the CD, and a plastic film; and a nonwoven first facing layer affixed to the first surface. A method for producing a laminate includes providing an elastic net layer and a plastic film layer, wherein the elastic net layer is elastic in the CD; stretching the elastic net layer in the CD to less than 100 percent stretch; affixing the plastic film layer to the elastic net layer to form an elastic web having a first surface and a second surface; relaxing the elastic web; affixing a fibrous nonwoven web to the first surface of the elastic web to form a composite nonwoven elastic web; and activating the composite nonwoven elastic web.

Description

Background technique [0001] The present disclosure generally relates to methods for forming composite nonwoven elastic webs and composite nonwoven elastic webs formed by such methods. In particular, the present disclosure encompasses composite nonwoven elastic webs comprising an elastic web joined to a nonwoven web, and methods for forming such composite nonwoven elastic webs. In particular, the present disclosure relates to elastic laminates and their use in various product applications. [0002] In the global market, current elastic materials used in products are usually based on stretch bonded elastic laminate technology using nonwoven fabrics. In the stretch bonded elastic lamination process, the elastic material (film or strand) is stretched to 3-5 times its relaxed length before being bonded to the facestock material. A cost analysis of current elastic laminates shows that facestock materials such as spunbond (SB) and spunbond-meltblown-spunbond (SMS) nonwovens account...

Claims

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Application Information

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IPC IPC(8): B32B27/12B32B5/02B32B7/12B32B37/12
CPCB32B7/12B32B27/12B32B37/02B32B37/12B32B37/144B32B38/0012B32B2038/0028B32B2555/00B32B5/022B32B5/028B32B5/26B32B2250/04B32B27/32B32B2260/025B32B2260/046B32B2262/023B32B2262/0253B32B2262/0276B32B2262/067B32B2262/062B32B2262/065B32B2262/04B32B2262/0284B32B2307/724B32B2307/51B32B2307/718B32B2307/558B32B2307/732B32B2432/00B32B2535/00B32B2571/00B32B2553/00B32B2555/02B32B5/02
Inventor 周培光W·李D·D·H·南
Owner KIMBERLY-CLARK WORLDWIDE INC