| US 7,501,361 B2 | ||
| Laminate material for an elastic diaper closure and method for its production | ||
| Georg Baldauf, Laer (Germany) | ||
| Assigned to Nordenia Deutschland Gronau GmbH, Gronau (Germany) | ||
| Filed on Dec. 09, 2004, as Appl. No. 11/8,704. | ||
| Claims priority of application No. 103 58 409 (DE), filed on Dec. 13, 2003. | ||
| Prior Publication US 2005/0130543 A1, Jun. 16, 2005 | ||
| Int. Cl. B32B 27/12 (2006.01); B32B 3/06 (2006.01); D04H 1/00 (2006.01); D04H 3/00 (2006.01) | ||
| U.S. Cl. 442—329 [442/328; 442/364; 442/394; 442/398; 428/99] | 3 Claims |
| 1. A tape for diaper closures, comprising
an elastic carrier film that has a preferred elongation direction and comprises a multi-layer co-extrusion film with a core
of a thermoplastic elastomer and an adhesion-imparting layer,
at least one cover layer that is laminated on the elastic carrier film, the cover layer comprising a spun-bonded fabric having
filaments, said filaments having a filament core of a thermoplastic elastomer, and a filament mantle of a non-elastic thermoplastic
polymer that has been deformed as a result of pre-stretching, and
a hook tape having male closure elements, said hook tape being attached to the cover layer by gluing or bonding and forming
a hook and loop closure with female closure elements that are attached on a front waistband of a diaper,
wherein the non-elastic thermoplastic elastomer within the filaments is 20-60 wt-% of the total weight of the fabric, and
wherein the fabric has a defined elongation limit resulting from pre-stretching in the preferred elongation direction by means
of an elongation of the fabric;
and wherein the carrier film and the cover layer are connected by an elastic hot melt adhesive that is applied in points,
in a grid or in strips that run in lines crosswise to the elongation direction.
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