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Highly flexible absorbent laminate and method for the production thereof

a technology of absorbent laminate and absorbent layer, which is applied in the direction of chemistry apparatus and processes, transportation and packaging, bandages, etc., can solve the problem of limited integrity of the lamina

Inactive Publication Date: 2013-01-10
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a way to make a textile sheeting material that can quickly absorb large amounts of liquid and adjust to the user's body shape. This material can be made in a cost-effective way. In a further improvement, the waviness of the material can be controlled to optimize the absorption capacity and comfort of the product.

Problems solved by technology

It has to be assumed that only limited integrity can be achieved for the laminate in the swollen state.

Method used

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  • Highly flexible absorbent laminate and method for the production thereof
  • Highly flexible absorbent laminate and method for the production thereof
  • Highly flexible absorbent laminate and method for the production thereof

Examples

Experimental program
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Embodiment Construction

[0012]Superabsorbents undergo a weight increase of 2500-5000% as they imbibe liquid. The associated increase in volume has to be accommodated through suitable flexibility on the part of the surrounding carrier material. This is in principle not a problem in the case of conventional pulp / superabsorbent pads, since the pulp allows expansion in all three dimensions. In the case of so-called superabsorbent laminates, in which superabsorbent granules or superabsorbent / fiber mixtures are fixed using pressure-sensitive adhesive or thermally between two or more plies of nonwovens, film, tissue or the like, this function has to be made possible by the outer plies of the laminate, whether through stretching or through geometric flexibility. But at all times the containment of the superabsorbent has to be ensured without one of the outer plies breaking or the lamination tearing open. It is further desirable that this laminate be elastically extendable not just perpendicularly to its production...

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PUM

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Abstract

The invention relates to a method for the continuous production of a flexible liquid-absorbing web material having two outer layers, at least one of which is formed by a textile material, between which are inserted at least two stretchable-elastic intermediate layers that are pre-stressed with respect to said layers and comprise filaments or bands arranged running in opposite directions to each other and obliquely with respect to the production direction. The intermediate layers shorten and gather the web material substantially transversely to the production direction thereof when the intermediate layers are relieved of stress. Powder-form or fibre-form inserts, which have absorbent properties for liquids, such as urine, blood, water or sweat, or resorbing properties, such as release of medicinal substances, cosmetic ingredients or for generating heat / cold, are introduced into the free spaces of the elastic intermediate layer.

Description

BACKGROUND OF THE INVENTION[0001]Textile absorbent materials capable of expanding in one coordinate direction at least to create room for the increased volume due to imbibition of liquid to be absorbed are more particularly needed in connection with disposable articles such as baby diapers, incontinence products and femcare hygiene, and also in the sector of absorbent articles for packaging and food technology.[0002]This function is traditionally performed by suitable combination products comprising pulp, superabsorbent granules or fibers and liquid-distributing layers comprising synthetic nonwovens, pulp or cotton.[0003]In recognition of the responsibility toward sustainability of the Earth's natural resources and the conscious approach to the consequences of their use, it is industry's responsibility to minimize the consumption of raw materials and packaging materials and also the transportation energy for manufacture and sales as far as possible. As far as the production of hygie...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61F13/539A61F13/538B29C63/10
CPCA61F13/15593Y10T428/24025A61F13/4902A61F13/5323A61F13/539A61F2013/49022A61F2013/49025A61F2013/49055A61F2013/53051A61F2013/530562A61F2013/53445B32B5/04B32B5/26A61F13/15617B32B3/28A61F2013/53089B32B5/028A61F13/15601B32B7/045B32B38/0032B32B3/266A61F2013/530868A61F2013/530875B32B7/14B32B38/04B32B37/0076B32B37/12A61F2013/530897B32B2307/73B32B2307/728B32B37/1292A61F13/15658B32B5/022B32B7/12B32B2262/02B32B2262/062B32B2262/08B32B2307/54B32B2307/546A61F13/15A61F13/532A61F13/49B32B7/05
Inventor FENSKE, WILFRIED
Owner EVONIK DEGUSSA GMBH
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