Disposable absorbent articles with clothlike feel backsheet having zoned breathability and process for making such backsheets
OwnerOlaf Erik Alexander Isele, Holger Berudainventors
Life of this patent
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Abstract
A disposable absorbent article comprising a breathable polymeric film at least partially combined with a fibrous material to a laminated for being used as backsheet material with zones having different breathability.
Claims20
Absorbent article comprising
- an absorbent core defining a core region comprising a core backsheet material;
- a chassis region surrounding said core region comprising a chassis backsheet material;
- whereby at least the core backsheet material comprises a laminate;
- said laminate comprising a vapour or gas permeable film or film like material, and further comprising a fibrous layer positioned towards the outer side of the article during its intended use,
- characterized in that
- at least one polymeric film layer is a unitary layer extending both in to the core backsheet material and the chassis backsheet materials,
- and whereby the core backsheet material and the chassis backsheet material which comprises said unitary layer exhibit different degrees of breathability such that MVTR values of the core backsheet material is lower than of the chassis backsheet material, and wherein said polymeric film layer comprises a polymeric matrix and particulate filler material embedded in said matrix.
An absorbent article according to any of the preceding claims, whereby said polymeric layer in the chassis region has a basis weight of less than 50 gsm.
An absorbent article according to any of the preceding claims, whereby said laminate layer in the region has a basis weight of less than 70 gsm.
An absorbent article according to any of the preceding claims, whereby said fibrous layer in a non-woven web.
An absorbent article according to any of the preceding claims, whereby the polymeric layer and the fibrous layer are combined by heat or melt bonding.
An absorbent article according to any of the preceding claims, whereby the polymeric layer and the fibrous layer are combined by extrusion coating.
An absorbent article according to any of the preceding claims, whereby the polymeric layer and the fibrous layer are combined by adhesive.
An absorbent article according to any of the preceding claims,
- where by the article is a baby diaper or an adult incontinence article.
A process for inducing zoned vapour or gas permeability into a laminate for being used in a product according to any of the preceding claims, comprising the steps of
- providing a polymeric film comprising particulate filler embedded in the polymeric matrix;
- providing a fibrous web which has equal width or is narrower than the film in cross-machine direction;
- combining the film and the web to form a laminate;
- stretching the laminated and the non-laminated film zones by feeding the film and laminate zones between a pair of opposed pressure applicators comprising three-dimensional surfaces which are complementary to one another;
- and
- subjecting the portions of said web located between said opposed pressure applicators to incremental cross dimensional elongation by causing said opposed three-dimensional surfaces of said pressure applicators mesh with one another, whereby said laminated and non-laminated film zones are at least partially permanently deformed and different vapour gas permeability is induced in various zones thereof.
Dependencies are inferred from the claim text.