Elastic diaper element
AssigneeRkw SE
InventorsChristoph Willing, Paul Waller, Michael Scherer, Reinhard Epping
Life of this patent
Estimating the term…
Abstract
An elastic diaper element that includes an elastic layer (1) and at least one layer (2) made of a nonwoven fabric. The element has connection portions (5) between the elastic layer (1) and the non-woven layer (2). The non-woven layer (2) is corrugated in the non-stretched state and has portions (6) that act as a reserve allowing stretching. The connection portions (5) include zones (8) in which there is a form-fitting bond of material of the layer (2) made of the nonwoven and solidified material of the elastic layer (1).
Claims14
A stretchable diaper element, comprising
- an extruded elastic layer (1);
- a layer (2) made of nonwoven material;
- the elastic layer has spaced-apart connecting regions (5) between the elastic layer (1) and the layer (2) made of the nonwoven material;
- the layer (2) made of the nonwoven material is corrugated in a non-stretched state of the diaper element to form regions (6) acting as reserve that are configured to enable stretching;
- the connecting regions (5) comprise zones (8) in which there is a form-fitting bond of material of the layer (2) made of the nonwoven material, including fibers of the nonwoven material that are not melted that are pressed into and pierce through a surface of the extruded elastic layer (1) when the extruded elastic layer (1) is in a molten state, and the fibers of the nonwoven material are held in place by a form-fitting bond with the extruded elastic layer (2) after solidification;
- and
- the fibers of the layer (2) made of the nonwoven material are in at least one of oriented or stretched form in the connecting regions (5).
A method for producing a laminate for a stretchable diaper element, comprising the following steps:
- forming a corrugated layer (2) made of nonwoven material with elevations and indentations,
- extruding an elastic layer (1),
- impressing the elevations or indentations of the corrugated nonwoven material layer (2) into the elastic layer (1) while the elastic layer is molten,
- forming spaced-apart connecting regions (5) between the layer (2) made of the nonwoven material and the elastic layer (1) by fibers of the nonwoven material that are not melted being pressed into and piercing through a surface of the elastic layer (1) when the elastic layer (1) is molten, and the fibers of the nonwoven material being held in place by a form-fitting bond with the extruded elastic layer (2) after solidification, and
- at least one of orienting or stretching the fibers of the layer (2) made of the nonwoven in the connecting regions (5).
Dependencies are inferred from the claim text.