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AssigneesCorovin GmbH, The Proctor & Gamble Company
InventorsHeinz-Horst Boich, Myrtha Wehrle, Attila A. Tamer, Peter Coles, See-Aun Soon
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A multilayered elastic sheetlike structure and a process for producing it are described. The sheetlike structure consists of at least one elastomeric layer of a homogeneous film/sheet and at least one inelastic fibre or filament layer which is connected to the elastomeric layer at mutually spaced-apart connection sites. Between the connection sites the fibre or filament layer is in folds when the elastomeric layer is in an untensioned or partially tensioned state and smooth when the elastomeric layer is in the completely tensioned state. The inelastic fibre or filament layer consists of an originally smooth, undrawn or partially drawn material which has been melted or adhered to the untensioned elastomeric layer at the connection sites and, after conjoint extension therewith, exhibits a persistent extension.
A multilayered elastic sheet structure suitable for use in diapers composed of at least one homogeneous elastomeric layer and at least one inelastic fibrous layer which is connected to said elastomeric layer at mutually spaced-apart connection points and is laid in folds between said connection points when said elastomeric layer is in an untensioned state and is nonfolded when said elastomeric layer is in a tensioned state, wherein said inelastic fibrous layer was originally provided as a nonfolded material of continuous fibers or finite microfibres, was fused or adhered to said elastomeric layer at said connection points when said elastomeric layer was untensioned, and subsequently was extended up to the vicinity of the breaking extension limit of said fibers or microfibers.
Process for producing a multilayered elastic sheet structure composed of at least one elastomeric layer of a homogeneous film/sheet and at least one inelastic fibre or filament layer which is connected to the elastomeric layer at mutually spaced-apart connection sites, the elastomeric layer in the untensioned state and the inelastic fibre or filament layer, which consists of an undrawn or partially drawn material, being first placed flat one on top of the other, characterized in that the elastomeric layer and the inelastic fibre or filament layer are then melted or adhered together at the mutually spaced-apart connection sites, then conjointly extended up to in the vicinity of the breaking extension limit of the fibres or filaments of the inelastic fibre or filament layer and finally untensioned again.
Dependencies are inferred from the claim text.