Method of making laminate structures for mechanical activation

Inactive Publication Date: 2007-08-30
THE PROCTER & GAMBNE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0009] An intermediate stretch laminate of the present invention can incur reduced defects from a mechanical activation process. In some embodiments, the intermediate stretch laminate may comprise a first nonwoven, an elastic film, and a second nonwoven. The elastic film can be attached to the first nonwoven via an adhesive such that the elastic film and the first nonw

Problems solved by technology

Because the activation region of the stretch laminate is intermeshed between the teeth of the activation rolls, the nonwoven materials are permanently elongated at least to a certain degree, so that upon release of the applied tensile forces, the stretch laminate generally will not fully return to its original undistorted configuration.
Consequently, the stretch laminate experiencing the mechanical activation process can be exposed to very high strain rates.
Unfortunately, many stretch la

Method used

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  • Method of making laminate structures for mechanical activation
  • Method of making laminate structures for mechanical activation
  • Method of making laminate structures for mechanical activation

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Definitions:

[0017] The following terminology is used herein consistent with the plain meaning of the terms with further details provided in the present specification.

[0018] As used herein, the term “absorbent article” refers to devices that absorb and contain body exudates and, more specifically, refers to devices that are placed against or in proximity to the body of a wearer to absorb and contain the various exudates discharged from the body.

[0019] The terms “activating”, “activation”, or “mechanical activation” refer to the process of making a substrate, or an elastomeric laminate more extensible than it was prior to the process.

[0020]“Basis weight” refers to the weight of a planar material for a given surface area. Basis weight is typically measured in grams per square meter (gsm). The basis weight of a stretch laminate is typically measured while the stretch laminate is in an unstrained configuration.

[0021] The terms “corrugations” or “rugosities” are used to describe hil...

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Abstract

A method for producing a stretch laminate includes forming an intermediate stretch laminate. Forming the intermediate stretch laminate includes providing a first substrate and attaching an elastic film to a surface of the first substrate via an adhesive. The first substrate and the elastic film are in a face to face orientation. The intermediate stretch laminate has a residual energy of greater than or equal to 50% at a predetermined applied strain. The method of forming the stretch laminate further includes mechanically activating the intermediate stretch laminate at a strain rate of at least 100 s−1.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a stretch laminate and a method of producing the stretch laminate such that the stretch laminate exhibits reduced defects from mechanical activation. The stretch laminate may be used in a variety of articles and is particularly useful in disposable absorbent articles such as baby diapers, adult incontinence articles, feminine hygiene articles, baby swim diapers, bibs, wound dressings, and any other articles where an elastically extensible stretch laminate may be desirable. BACKGROUND OF THE INVENTION [0002] Stretch laminates can be used in a wide variety of disposable absorbent articles. For example, in order to provide a disposable absorbent diaper which can fit a range of wearers and minimize leaks, disposable absorbent diapers often include stretch laminates. Because the wearers of disposable absorbent diapers vary in size, stretch laminates are often used in the waist region and leg regions of the disposable absorben...

Claims

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Application Information

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IPC IPC(8): B32B27/04D04H13/00
CPCB29C55/18B32B37/12B32B2307/51B32B2038/0028B32B2305/20B32B37/144Y10T442/60Y10T442/2738Y10T442/601
Inventor ANDERSON, BARRY JAYVENKITARAMAN, ANAND RUDRAREISING, GEORGE STEPHENAUTRAN, JEAN-PHILIPPE MARIEGROLMES, JOSEPH LESLIE
Owner THE PROCTER & GAMBNE CO
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