WO2007077214A1

WO2007077214A1 - Laminated acquisition and distribution layer structure for absorbent hygiene products and method for producing the same

Info

Publication number: WO2007077214A1
Application number: PCT/EP2007/000020
Authority: WO
Inventors: Alvaro Garcia; Elisabeth Kirsch; Katja Lerner
Original assignee: Johnson & Johnson Gmbh
Priority date: 2006-01-04
Filing date: 2007-01-03
Publication date: 2007-07-12
Also published as: DE102006000780A1

Abstract

The invention relates to a laminated acquisition and distribution layer structure for absorbent hygiene products, comprising at least one cover layer containing at least one nonwoven that is produced by spun-lace techniques and that is, in at least some parts, endowed with hydrophilic properties, and at least one transfer layer containing at least one nonwoven that is produced by through-air bonding and that is, in at least some parts, endowed with hydrophilic properties, the nonwoven of the cover layer and the nonwoven of the transfer layer being a hydroentangled laminate. The absorbent layer structure can be produced without complications on an industrial scale, has a surface with a textile touch and can be provided with an embossed pattern in a simple, reliable and permanent manner. The invention also relates to a method for producing the layer structure according to the invention and to absorbent products containing said layer structure.

Description

Laminated acquisition and distribution layer structure for absorbent personal care articles and methods of making the same

description

The present invention relates to an acquisition and distribution layer structure for absorbent sanitary articles in the form of a laminate of at least one cover layer and at least one transfer layer, a process for their preparation and an absorbent article containing this layer structure. The invention further relates to sanitary napkins, diapers, incontinence protection products, bandages, wipes, panty liners and hygiene products for personal care, comprising the layer structure according to the invention.

Absorbent articles are nowadays used in many different applications. Examples are only hygiene products for personal care, diapers, household cleaning products or medical applications. Since these disposable products are used and demanded in large quantities, it is a constant endeavor not only to optimize the products as such, but also their large-scale production. In particular, it is desirable to be able to resort to absorbent articles, which have a lower volume and a lower weight compared to conventional articles, but nevertheless have no quality losses in terms of their absorption properties and wearing comfort.

US 6,022,818 discloses a hydroentanglement-associated absorbent structure comprising a first layer containing absorbent fibers, eg pulp fibers, and a second layer containing so-called matrix fibers, eg polyolefin staple fibers. While the pulp fibers serve to hold liquid, the absorption capacity of the matrix fibers is less pronounced in order to be able to supply liquid to the absorbent layer. According to US Pat. No. 6,022,818, the layer of matrix fibers can be produced by means of the through-air bonding technique using bicomponent fibers comprising a polyethylene sheath and a polyester core. However, the products obtained according to US Pat. No. 6,022,818, for example sanitary napkins or diapers, still leave something to be desired, in particular with regard to the absorption capacity, the surface grip, the complexity of the production process and the embossability of the surface.

EP 0 557 678 A1 discloses a hydroentangled composite nonwoven with a spunbonded base layer. This structure is said to be superior to spun-laced hydro- entangled layers, such as spun lacing. in US 4,442,161 and US 4,705,712, characterized by a tensile strength which is equally pronounced in the machine direction and in the cross-machine direction. For this, the spunbonded fabric is to be stretched in the cross-machine direction by at least 5% of its original length. The necessity of having to integrate the stretching step in the large-scale, fully automatic production process inevitably causes a greater production cost and production costs.

The patent application US 20030028985 A1 discloses a multi-layer cleaning pad comprising a cleaning layer, a wiping layer and an absorber layer. Among other things, a nonwoven material is proposed for the wiping layer which is accessible by means of hydroentanglement / spun lacing and through-air bonding technology and may be composed of, for example, pulp fibers or rayon or polyolefin fibers. The nonwoven wipe layer is preferably hydrophilic. Whether and to what extent the characteristics of the multi-layered cleaning pad according to the patent application US 20030028985 A1 can also be transferred to absorbent hygiene products is left entirely open in this document. Also, with such cleaning articles, there is often no need to reduce the weight or volume of the absorbent article. In particular, this document also does not deal with interactions or effects that can be obtained by combining separate, laminated layers, each with a characteristic property profile.

US 6,107,539 describes an absorbent article comprising a front and a backsheet and a liquid collection and distribution region and another region for storing this liquid. In this case, the cover layer may include the area for receiving and distributing liquid and, for example, consist of a cellulosic fiber material. Furthermore, the liquid transport between adjacent Distribution and storage areas can be improved by incorporating a thin intermediate layer. The intermediate layer can be obtained, for example, by depositing fibrous material on a porous material by means of air-laying. With the structure presented in US Pat. No. 6,107,539, it should be possible to store liquid more strongly in the absorbent core and, moreover, to ensure an always dry-feeling surface. The absorbent article according to US 6,107,539, however, is very complicated in construction and expensive to manufacture, especially in mass production. The machinability of the surface also leaves something to be desired.

The present invention is therefore an object of the invention to provide an absorbent article that can be produced inexpensively and easily in automated mass production, the surface of which feels like a Textiloberflä- and can be easily and permanently shaped with any pattern. A further object of the present invention is to provide an absorbent article which has a further reduced density or a reduced basis weight compared with conventional products, without at the same time having to accept losses in its absorption and retention properties.

Accordingly, there has been found a laminated acquisition and distribution layer structure for absorbent personal care articles comprising at least one cover layer containing at least one nonwoven fabric prepared by spunlace technique and provided at least partially with hydrophilic properties and at least one transfer layer comprising at least one nonwoven fabric contains, which is produced by means of through-air bonding technique and which is at least partially equipped with hydrophilic properties, wherein the fleece of the cover layer and the fleece of the transfer layer constitute a hydroentanglement formed laminate.

Nonwovens in the sense of the present invention are to be understood as so-called nonwovens. The spunlace technique, also called spunlacing, is generally used to make very soft and flexible nonwoven fabrics and involves looping the fibers together to form a coherent layer. Spunlacing in the context of the present invention is also intended to encompass the processes of water-jet needling or hydroentanglement. This manufacturing method, for example, is based on a cadal fiber web, wherein the interlocking of the fibers is achieved in that the fibers with a large number of adjacent, very fine water jets under high Pressure are applied. For example, multiple rows of jets of water may be directed at the fibrous web carried by a mobile web. This method is also described as a so-called hydroentangling method: Instead of using water jets, the interweaving or intermeshing of the fibers of a nonwoven web can also be effected by fine high-pressure air jets. however, the fibers are typically not chemically or physically bonded to one another For further details on the spunlace technique, see Canadian Patent CA 841,938 and the Encyclopedia of Polymer Science and Engineering, Vol. 10, pp. 204-253 (1987). , referenced.

In the through-air-bonding technique, the fibers of a fiber fabric or a fibrous web, the z. B. has been obtained by airlaid technique, controlled with a stream of heated air, so that at least partially melt the surfaces of at least some fibers and connect with cooling with adjacent fibers. For the through-air-bonding technique, especially so-called bicomponent fibers with a core and a low-melting outer shell are suitable. With such fibers, it is sufficient to melt the sheath without affecting the integrity of the fiber core. Accordingly, the melting and re-solidification of at least some fiber materials already causes bond formation in the nonwoven fabric.

The cover layer, which has an upper and an opposite lower side, may be arranged in the absorbent article according to the invention such that the upper side is open and readily accessible to the outside, while the lower side rests against the upper side of the transfer layer. Alternatively, the top side of the cover layer itself may in turn at least partially with another layer or layer, for. B. a protective layer to be covered. Preferably, the top of the layer also represents the outside of the absorbent article.

The fibers used for the fleece of the transfer layer are preferably at least partially meltable in a stream of hot or warm air and in particular comprise so-called bicomponent fibers. Alternatively or in addition to fibers which can not be fused under the conditions of through-air bonding, in addition to the fibers conventionally used for the through-air bonding technique, such as described above, too synthetic fibers of a thermoplastic material, such as polypropylene, polyethylene, polyester or polyamide fibers are used.

According to a further embodiment, in the production of the nonwoven material for the transfer layer, it is also possible to resort to thermoplastic powders or granules which distribute within the fibers of this layer and, under the conditions of through-air bonding, cause bond formation among the fibers due to their thermoplastic nature. The transfer layer or the fleece of the transfer layer can thus be composed of a wide variety of mixtures of natural and / or synthetic fibers, as long as it is ensured that the bond formation between the fibers takes place by means of the through-air-bonding technique.

For the purposes of the present invention, a laminated acquisition and distribution layer structure for absorbent hygiene articles or a laminated absorbent article should basically be understood to mean structures or articles which are formed from at least one separate cover layer and at least one separate transfer layer, irrespective of whether in the layer structure according to the invention or the absorbent article after completion, macroscopically reveal a layer structure.

Fibers with hydrophilic properties which are suitable for the formation of the cover layer are, for example, synthetic and natural fibers with at least one at least partially polar outer surface. For example, fibers of polyamides, polyesters or rayon may be used among the natural polar fibers on cotton fibers and among the synthetic polar fibers. Preference is also given to synthetic nonpolar fibers, such as, for example, polyolefin fibers, in particular polyethylene and polypropylene fibers, with a polar shell material of, for example, polyamide or polyesters, so-called bicomponent fibers. Particular preference is given to using hydrophilically equipped polyester fibers by surface modification. Such fibers are available, for example, under the trade name Hydrofix from DuPont, for example in unit lengths of 1, 7 or 38 mm. Such a hydrophilic fiber does not lose its hydrophilic character even with a water jet treatment. The bicomponent fibers with spiral crimp and eccentric core to be used in particular for the transfer layer are commercially available, for example, from FiberVision under the trade name ESC-UB.

In an advantageous embodiment, it is accordingly provided that the fleece of the cover layer and / or the fleece of the transfer layer comprises at least one multiply, in particular bicomponent fiber and / or at least one synthetic fiber, each with at least partially hydrophilic surface. Particularly preferred synthetic fibers include polyolefins such as polypropylene fibers and polyethylene fibers, and polyesters, preferably polyethylene terephthalate fibers, having at least partially hydrophilic surface.

Furthermore, it is provided in an embodiment according to the invention that the fleece of the transfer layer comprises bicomponent fibers with spiral crimping and eccentric core.

It can be provided that the fleece of the transfer layer comprises a polyethylene / polypropylene bicomponent fiber.

Suitable fibers of the web of the transfer layer may, for. B. be at least partially equipped with at least one permanent hydrophilic coating, in particular a permanent hydrophilic fiber finish.

Of course, the nonwoven of the transfer layer can also be based on fibers with non-permanent hydrophilic coating or non-permanent hydrophilic fiber finish and on mixtures of the aforementioned fibers with fibers with permanent hydrophilic coating or permanent hydrophilic fiber finish. Nonwoven webs for the transfer layer, which are based essentially exclusively on fibers with permanent hydrophilic coating or permanent hydrophilic fiber finish, are particularly preferred.

A further embodiment is characterized in that the cover layer comprises a mixture of at least one bicomponent fiber and a polypropylene fiber with at least partially hydrophilic surface and the transfer layer comprises a polyethylene / polypropylene bicomponent fiber. A further embodiment further provides that the nonwoven form of cover layer and transfer layer comprise the same fiber material. In this case, it is also possible to resort to absorbent articles in which the nonwovens of cover layer and transfer layer consist of the same fiber material. Particular preference is given to those layer structures in which only the transfer layer, but not also the thick layer, is provided with a multicomponent or bi-component fiber.

By being able to use the same fiber materials according to the invention for both the cover layer and the transfer layer, the production process can be substantially simplified. In addition, the logistics of the components to be made available for the manufacturing process are very simple and uncomplicated compared to conventional production methods. Although the same fiber materials can be used for the cover and the transfer layer, both layers nevertheless differ in their functionality, so that the combined property profiles of conventional, multi-layer absorbent material absorbent articles can already be covered by the structure according to the invention.

The transfer layer of the layer structure according to the invention ensures a very good distribution behavior with respect to the absorbed liquid, has a sufficient thickness despite minimal use of material and at the same time also to some extent has fluid absorption properties. In addition to an excellent acquisition or acquisition characteristic, the cover layer also contributes to a very good and lasting embossability of the layer structure.

It has proven to be particularly advantageous, in particular for medical and hygienic applications, that no binders and / or adhesives are required to maintain and maintain the integrity of the cover and transfer layer and of the laminate formed from these layers. The use of so-called construction adhesive materials, which are often used in nonwoven webs, can be completely dispensed with, without having to accept losses in terms of the strength of the nonwoven fabric. Another advantage is that the fluid absorption properties of the layer structure according to the invention are not impaired by such adhesive materials. The connection of cover and transfer layer or the nonwovens of cover and transfer layer is achieved in the present case by means of so-called hydro-turbulence. Furthermore, it can be provided according to the invention that the basis weight of the cover layer in the range of 10 to 70 g / m ² , in particular in the range of 15 to 50 g / m ² , and particularly preferably in the range of 20 to 35 g / m ² and / or the basis weight of the transfer layer is in the range from 10 to 100 g / m ² , in particular in the range from 20 to 50 g / m ² , and particularly preferably in the range from 35 to 45 g / m ² . Due in part to the fact that the present absorbent article does not necessarily rely on the use of adhesives and / or binders, the basis weight of the components used can be kept very low. Despite these very low basis weights of the nonwovens used and the consequent minimized use of material, the absorbent article according to the invention nevertheless ensures excellent absorption properties and an optimized distribution of the absorbed liquid. In this regard, it has also been found that, despite the low basis weight, the volume of the absorbent articles does not become too low or shallow when using bicomponent fibers with spiral crimp and eccentric core.

Further embodiments of the present invention is characterized in that the cover layer and / or the transfer layer has or have at least one embossed pattern. Not only are embossing patterns of interest to absorbent articles because of their aesthetic appeal, but they also help to create a so-called textile grip that contributes to a very advantageous wearing comfort. Moreover, by suitable embossing patterns, the integrity and stability of the laminate of cover and transfer layer can be significantly increased again. Surprisingly, it has been found that with the absorbent articles according to the present invention embossed patterns can be incorporated particularly easily into the cover and / or transfer layer and, moreover, remain permanently in these layers. In particular, the latter aspect has been found to be extremely problematic in conventional absorbent articles.

Suitable embossing patterns are e.g. by means of water-jet embossing, mechanical embossing, with and without heat, and / or ultrasound treatment.

In a further embodiment it can be provided that the cover layer and / or the transfer layer in each case has or have at least one embossed pattern which in particular does not overlap or does not completely overlap. It is also proposed that the cover layer and the transfer layer each have at least one embossed pattern that does not match in shape and / or size.

It can be provided that at least one embossing pattern is produced in particular by means of Wasserstrahlprägens.

In a particularly preferred embodiment, the process of laminate formation by means of hydroentanglement is used specifically to simultaneously provide the layer structure according to the invention with an embossing pattern. In this way, an additional embossing station can be saved. In order to achieve this, it is already sufficient in many cases to equip the underlay on which the transfer and cover layers rest, with a three-dimensional negative mold of the desired embossing pattern. Advantageously, this negative mold has passages or openings through which the applied amounts of water can flow away.

According to a further aspect of the present invention, an absorbent article is provided which, in this order, has at least one layer structure according to the invention, at least one absorbent core, in particular immediately adjacent to the transfer layer of the layer structure, and optionally at least one fluid-impermeable barrier layer. Such absorbent articles include, for example, sanitary napkins, diapers, incontinence guards, bandages, panty liners and wipes. Furthermore, it is also possible to provide tampons with the absorbent article.

The object underlying the invention is further achieved by a method for producing a laminated absorbent acquisition and distribution layer structure for absorbent hygiene articles, comprising the steps of: a) producing at least one nonwoven fabric for at least one cover layer comprising a top and an opposite bottom side b) producing at least one nonwoven fabric for at least one transfer layer, comprising an upper and an opposite underside, made of hydrophilic fibers and / or fibers with a hydrophilic coating by means of through-air bonding technique, and c) forming a laminate of cover layer and transfer layer by means of hydroentanglement of the cover and transfer layer webs, the underside of the cover layer and the top side of the transfer layer being adjacent to one another.

In a further development of the method according to the invention, the top and / or the underside of the cover layer and / or the transfer layer before the laminate formation with at least one embossed pattern and / or the formed laminate of cover layer and transfer layer from the top of the cover layer and / or provided with at least one embossed pattern from the underside of the transfer layer.

A development of the method according to the invention provides that in step c) the cover layer and / or the transfer layer is or are provided with at least one embossed pattern by means of water jet embossing prior to the laminate formation. Of course, it is also possible that in step c) the cover layer and the transfer layer in the laminated state after the hydroentanglement are provided with at least one embossed pattern.

With the absorbent articles of the present invention, the surprising finding is accompanied by being able to obtain a product which has a very low basis weight but is sufficiently thick and has a very good liquid absorption capacity and a very good liquid distribution characteristic. By combining two nonwoven layers, each of which has been produced by a special process, one of the spunlace technique for the cover layer and the other, the through-air bonding technique for the transfer layer, even with the use of identical materials, absorbent laminate systems can be obtained Individual layers perceive different functions, which also complement each other in a very effective way. It has proven to be particularly advantageous that the absorbent articles according to the invention can be provided without any problems and also permanently with an embossed pattern. The products obtained in this way are, in particular after the embossing process, provided with a surface which feels as if it were a textile surface. The wearing comfort of the products made with these absorbent articles, for example of diapers or sanitary napkins, can thus be sustainably increased. In the present case, unlike conventional absorbent articles, it is not necessary to stretch the absorbent article for quality or property improvement. As a result, the production process according to the invention can be kept very simple. With the aid of the layer structure according to the invention, in particular, panty liners can also be produced particularly efficiently, for example, in particular by the combination of a cover layer obtained by spunlace technique and a transfer layer obtained by means of through-air bonding technique. By interweaving fibers of the cover layer with fibers of the transfer layer by means of the hydro-entangling process, without the need for a chemical process or an adhesive material, improved fluid absorption and likewise improved distribution of fluids over the entire extent of the layer structure succeed. It is also noteworthy that the embossing patterns obtained by means of water jet embossing in the layer structure according to the invention show very clear and permanent edge or edge courses. In addition, depressions with different levels of depth can be introduced into the layer material by means of water jet embossing. Furthermore, it is of considerable advantage that the layered structures according to the invention treated by means of water jet embossing no longer tend to fraze or only greatly reduced, which considerably increases the wearing comfort. Moreover, with the laminate according to the invention, it is possible to use a very low basis weight for the cover layer nonwoven produced by spunlace technique. As a result, a very thin layer structure is made possible, although we perceived the layer material according to the invention as a structure with a pronounced three-dimensional extent.

Compared with conventional, commercially available layer or absorption structures, the layer structure according to the invention is at least equal in terms of rewettability behavior and absorbency. Re-wettability or re-wettability should be understood here to mean the retention or retention capacity of the layer structure with regard to the fluid taken up.

Thus, the layer structure according to the invention is characterized by an improved embossability, an improved absorption capacity and also by improved acquisition and distribution characteristics. With the layer structure according to the invention, it is now even possible to take up liquid casings and distribute them appropriately.

Surprisingly, it has also been found that the laminated layer structure according to the invention or a fabric web of this layer structure is characterized by improved uniformity. Also, no delamination phenomena are observed between the cover and transfer layers, and although no binder or adhesive is present between see these layers are used. In this way, moreover, the production process of the layer structure according to the invention can be represented very simply.

Further features and advantages of the invention will become apparent from the following description in which an embodiment is explained in detail with reference to a schematic drawing. This figure shows a schematic side view of an apparatus for the production of the layer structure according to the invention.

The layer structure 1 is composed of a cover layer 2 and a transfer layer 4. The nonwoven web of the cover layer 2 is fed after passing through the carding unit 6 to a hydro-entangling device 8. The transfer layer 4 produced by means of through-air-bonding technology is also supplied to the hydro-entangling device 8 after passing through a through-air bonding device 10. This hydroentanglement device 8 comprises an at least partially perforated cylinder 16 on which the cover layer 2 and the transfer layer 4 rest, the cover layer 2 being in direct contact with the cylinder surface, while the transfer layer 4 is at least in the areas on the underside of the cover layer 2 rests, in which the hydro-turbulence with the help of Hydroverwirungungseinheit 12 as part of the device 8 takes place. The hydrovirving unit 12 has a multiplicity of water jet nozzles, through which a very fine high-pressure water jet can be applied to the transfer layer in each case. Already during the formation of the laminate of cover and transfer layer by means of hydroentanglement, one or more patterns can be incorporated into the layer structure, in particular from the side of the cover layer, by suitable configuration of the surface of the cylinder. In a water jet embossing device 14 connected downstream of the hydro-entangling unit 12, further or, for the first time, an embossing pattern can then be incorporated into the layer structure. The material obtained in this way is particularly suitable as a cover layer system for panty liners and sanitary napkins. It is characterized by a particularly soft surface, which feels on the skin like conventional textile fabric and thus guarantees a very high wearing comfort.

The rewettability or the retention capacity and the absorption capacity of a laminated structure according to the invention are reproduced by way of example below. This laminate structure comprises a cover layer made of 65% by weight of viscose fibers and 35% by weight of PET fibers produced by means of spunlace technology and a transfer layer made of 70% by weight of bicomponent fibers "ES" produced by through-air-bonding technology. Delta "from FiberVisions and 30% by weight PET fibers" Fillwell "from Wellmann. Cover and transfer layer were connected by means of hydroentanglement. The basis weight of the cover layer was 55 g / m ² , that of the transfer layer 40 g / m ² .

The absorbency of the laminate structure in the form of a sanitary napkin was tested by dropping 7 ml of aqueous test liquid to a location on the topcoat such that each drop penetrated and was absorbed into the laminate structure. The time between the onset of the first liquid drop and the complete absorption of the last liquid drop was about 14 seconds.

The retention capacity of this laminate structure was determined by covering the above-described liquid-soaked product with ten layers of filter paper MN 615 (Macherey and Nagel) and weighing for three minutes with a weight of 5 kg. The difference between the weight of the filter paper in the dry state and after three minutes of contact with the laminate structure containing the test fluid provides a measure of their retention capacity and in the present case was 1.4 g.

The features of the invention disclosed in the foregoing description, in the drawing and in the claims may be essential both individually and in any combination for the realization of the invention in its various embodiments.

Claims

claims

A laminated absorbent acquisition and distribution layer structure for sanitary articles, comprising at least one cover layer containing at least one nonwoven fabric produced by spunlace technique and provided at least partially with hydrophilic properties, and at least one transfer layer containing at least one nonwoven fabric, which is produced by means of through-air bonding technology and which is provided at least in some areas with hydrophilic properties, wherein the fleece of the cover layer and the fleece of the transfer layer constitute a laminate formed by hydroentanglement.

2. Layer structure according to claim 1, characterized in that the nonwoven of the cover layer and / or the nonwoven of the transfer layer at least one multi, especially bicomponent fiber, and / or at least one synthetic fiber, each having at least partially hydrophilic surface comprises.

3. Layer structure according to claim 1 or 2, characterized in that the fleece of the transfer layer comprises bicomponent fibers with spiral crimping and eccentric core.

4. Layer structure according to one of the preceding claims, characterized in that the fleece of the transfer layer comprises a polyethylene / polypropylene bicomponent fiber.

5. Layer structure according to one of the preceding claims, characterized in that the fibers of the nonwoven fabric of the transfer layer at least partially have at least one permanent hydrophilic coating, in particular a permanent hydrophilic fiber finish.

6. Layer structure according to one of the preceding claims, characterized in that the cover layer and the transfer layer comprise the same fiber material or consist of the same fiber material.

7. Layer structure according to one of the preceding claims, characterized in that the basis weight of the cover layer in the range of 10 to 70 g / m ² , in particular in the range of 15 to 50 g / m ² , and / or the basis weight of the transfer layer in the range of 10 to 100 g / m ² , in particular in the range of 20 to 50 g / m ² , is or lie.

8. Layer structure according to one of the preceding claims, characterized in that the cover layer and / or the transfer layer has or have at least one embossing pattern.

Absorbent article comprising at least one layered structure according to any one of the preceding claims, at least one absorbent core, in particular immediately adjacent to the transfer layer of the layered structure, and optionally at least one liquid-impermeable barrier layer facing that side of the absorbent core facing the laminate Cover layer and transfer layer opposite.

A method of making a laminated absorbent acquisition and distribution layer structure for absorbent personal care articles according to any one of claims 1 to 8 comprising the steps of: d) preparing at least one mat for at least one cover layer comprising a top and an opposite bottom surface of hydrophilic fibers and / or fibers having a hydrophilic coating by means of the spunlace technique, e) producing at least one nonwoven fabric for at least one transfer layer, comprising an upper and an opposite underside, made of hydrophilic fibers and / or fibers having a hydrophilic coating by means of through-air bonding Technique, and f) forming a laminate of cover layer and transfer layer by means of hydroentanglement of the cover and transfer layer webs, the underside of the cover layer and the top side of the transfer layer being adjacent to one another.

1 1. A method according to claim 10, characterized in that the nonwoven for the transfer layer comprises bicomponent fibers.

12. The method according to claim 11, characterized in that the bicomponent fibers have a helical crimp and an eccentric core.

13. The method according to any one of claims 10 to 12, characterized in that the nonwoven for the cover layer bicomponent fibers and / or at least one polypropylene fiber, each having at least partially hydrophilic surface comprises.

14. The method according to any one of claims 10 to 13, characterized in that in step c) the cover layer and / or the transfer layer is provided by means of Wasserstrahlprägens with at least one embossed pattern before the laminate formation.

15. The method according to any one of claims 10 to 14, characterized in that in step c) the laminate of cover layer and transfer layer is provided by Wasserstrahlprägens with at least one embossed pattern.

16. sanitary napkin, comprising at least one layer structure according to one of claims 1 to 8.

17. A diaper comprising at least one layered structure according to one of claims 1 to 8.

18. incontinence protection, comprising at least one layer structure according to one of claims 1 to 8.

19. A dressing comprising at least one layered structure according to one of claims 1 to 8.

20. Wipe, comprising at least one layer structure according to one of claims 1 to 8.

21. Tampon comprising at least one layer structure according to one of claims 1 to 8.

22. panty liner, comprising at least one layer structure according to one of claims 1 to 8.