Tear resistant porous extensible web

Abstract

The present invention pertains to a porous, macroscopically-expanded, three-dimensional, elastomeric web suitable for use in elasticized portions of disposable absorbent articles such as bandages, diapers and pull-up diaper training pants. In a preferred embodiment the web has a continuous first surface and a discontinuous second surface remote from first surface. An elastomeric web of the present invention preferably comprises a formed film having at least two polymeric layers, with at least one of the layers being an elastomer and at least one of the other layers being a substantially less elastomeric skin layer. In a preferred embodiment the elastomeric web exhibits a multiplicity of primary apertures in the first surface of the web, the primary apertures being defined in the plane of the first surface by a continuous network of interconnecting members. Each interconnecting member exhibits an upwardly concave-shaped cross-section along its length. The interconnecting members terminate substantially concurrently with one another to form a secondary aperture in the plane of the second surface of the web. Also disclosed is a method of producing the elastomeric web of the present invention comprising providing a multilayer elastomeric film, supporting the film on a forming structure, and applying a fluid pressure differential across the thickness of the multilayer film. The fluid pressure differential is sufficiently great to cause the multilayer film to conform to the supporting structure and rupture in at least portions of the formed film.

1 . An elastomeric laminate comprising:
 a nonwoven;   an apertured elastomeric film comprising a polyolefinic material;   wherein the nonwoven is joined to the film;   wherein the elastomeric film comprises a plurality of apertures such that the elastomeric film has an open apertured area of at least 12%;   wherein the plurality of apertures comprises a first aperture and a second aperture; and   wherein the first aperture and the second aperture have different shapes such that the first aperture is generally circular and the second aperture is non-circular.