Spunbond nonwoven laminates and methods of making spunbond nonwoven laminates

Abstract

The invention relates to a spunbond nonwoven laminate having at least two spunbond nonwoven layers made of continuous filaments, in which there is at least one crimped spunbond nonwoven layer having crimped continuous filaments. The crimped continuous filaments of the at least one crimped spunbonded nonwoven layer are multi-component filaments having at least one first polymer component and at least one second polymer component. There is at least one reinforcing spunbond nonwoven layer consisting of non-crimped continuous filaments and / or consisting of or consisting essentially of continuous filaments less crimped compared to the continuous filaments of the at least one crimped spunbond nonwoven layer. The continuous filaments of the reinforcing spunbonded nonwoven layer have at least one bonding component disposed on a surface thereof. The difference in melting temperature between the bonding component of the continuous filaments of the reinforcing spunbonded nonwoven layer and the first polymer component of the continuous filaments of the at least one crimped spunbonded nonwoven layer is less than 15 DEG C. The laminate has a cantilever maximum bending stiffness of at most 100 mm.

Description

Technical Field

[0001] The present invention relates to a spunbond nonwoven laminate, which has at least two spunbond nonwoven layers made of continuous filaments, wherein there is at least one crimped spunbond nonwoven layer, which has crimped continuous filaments, in particular, consists of crimped continuous filaments or is essentially composed of them, wherein the crimped continuous filaments of the at least one crimped spunbond nonwoven layer are multi-component filaments, in particular bi-component filaments. In addition, the subject of the present invention is also a method for manufacturing a spunbond nonwoven laminate, which has at least two spunbond nonwoven layers made of continuous filaments. The continuous filaments of at least two spunbond nonwoven layers of the spunbond nonwoven laminate according to the present invention are preferably continuous filaments made of thermoplastics. Continuous filaments are distinguished from staple fibers due to their almost unlimited length, and the staple fibers have a significantly smaller length, for example 1 mm to 60 mm. Background Art

[0002] Spunbond nonwoven laminates and methods for making spunbond nonwoven laminates are basically known in practice with different embodiments. For spunbond nonwovens or spunbond nonwoven laminates, for subsequent applications, such as applications in the field of hygiene, it is usually desired that they have satisfactory drape. However, most of the spunbond nonwoven laminates with good drape have poor mechanical stability, and in particular, are usually unable to sufficiently resist the larger pulling force acting on the spunbond nonwoven laminate. This is disadvantageous, so for spunbond nonwoven laminates, it is also desired that they are mechanically stable, in particular, have sufficient longitudinal rigidity, which also ensures the machine versatility of the spunbond nonwoven laminate. In this regard, for the spunbond nonwoven laminates known by practice, there is a conflict of objectives between satisfactory drape and sufficient mechanical stability, in particular sufficient longitudinal rigidity. In this connection, it is known that a multilayer spunbond nonwoven laminate is provided, each layer of which has different properties, for example in terms of softness and strength, so that different target parameters of the spunbond nonwoven laminate can be set by the properties of the individual layers. Such spunbond nonwoven laminates have been proven to be effective in principle. However, it has been shown in these measures known from practice that the wear resistance of spunbond nonwoven laminates is often not satisfactory. In particular, in known spunbond nonwoven laminates, undesirable delamination processes have been observed. In addition, it has not been possible to achieve an optimal balance between the drapability and the mechanical stability of the spunbond nonwoven laminate so far. There is a demand for improvement in this respect. This is exactly the starting point of the present invention. Summary of the invention

[0003] The invention is based on the technical problem of providing a spunbonded nonwoven laminate of the type mentioned at the outset, in which an optimum balance is achieved between satisfactory drapability and sufficient mechanical stability, in particular advantageous longitudinal stiffness, and in which undesired delamination processes can nevertheless be avoided, and in this respect the spunbonded nonwoven laminate is preferably also distinguished by advantageous abrasion resistance. The invention is also based on the technical problem of providing a method for producing such a spunbonded nonwoven laminate.

[0004] In order to solve this technical problem, the present invention teaches a spunbond nonwoven laminate, which has at least two spunbond nonwoven layers made of continuous filaments, wherein there is at least one crimped spunbond nonwoven layer, which has crimped continuous filaments, in particular consists of crimped continuous filaments or essentially consists of them, wherein the crimped continuous filaments of the at least one crimped spunbond nonwoven layer are multicomponent filaments, in particular bicomponent filaments, which have at least one first polymer component (Kunststoff) with a preferably low melting point and at least one second polymer component with a preferably higher melting point,

[0005] wherein there is at least one reinforcing spunbond nonwoven layer consisting of or consisting essentially of non-crimped continuous filaments and / or of continuous filaments that are less crimped than the continuous filaments of the at least one crimped spunbond nonwoven layer, wherein the continuous filaments of the reinforcing spunbond nonwoven layer have at least one bonding component disposed on a surface thereof,

[0006] wherein the melting temperature difference between the bonding component of the continuous filaments of the reinforcing spunbond nonwoven layer and the preferably low-melting first polymer component of the continuous filaments of the at least one crimped spunbond nonwoven layer is less than 15° C., preferably less than 12° C., preferably less than 8° C., particularly preferably less than 5° C., very preferably less than 3° C., very particularly preferably less than 2° C., for example 0° C. or about 0° C.,

[0007] And wherein the laminate has a cantilever maximum bending stiffness of at most 100 mm, preferably at most 90 mm, preferably at most 80 mm, particularly preferably at most 75 mm and very particularly preferably at most 70 mm.

[0008] According to a very preferred embodiment, the laminate according to the invention has a maximum bending stiffness of the cantilever of a maximum of 65 mm, preferably a maximum of 55 mm, particularly preferably a maximum of 50 mm, very particularly preferably a maximum of 45 mm. When the cantilever is mentioned here and below, it preferably refers to the cantilever of the spunbond nonwoven laminate in the MD direction and / or CD direction, preferably at least the cantilever of the spunbond nonwoven laminate in the MD direction. Within the scope of the present invention, the machine direction (MD) refers in particular to the conveying direction F of the spunbond nonwoven laminate on the laying device. In contrast, CD or CD direction refers to the direction transverse to the machine direction.

[0009] The bending stiffness of a spunbond nonwoven laminate is determined within the scope of the present invention in particular according to the method "WSP 90.1 (05) Standard Test Method for Stiffness of Nonwovens: Fabrics Using Cantilever Test". In addition, within the scope of the present invention, a distinction is made between the bending stiffness of the spunbond nonwoven laminate as one aspect and the longitudinal stiffness as another aspect. The bending stiffness is in particular a measure of the drapability of the spunbond nonwoven laminate, whereas the longitudinal stiffness is in particular a measure of the mechanical stability of the spunbond nonwoven laminate and preferably a measure of the machine versatility of the spunbond nonwoven laminate. The longitudinal stiffness within the scope of the present invention refers in particular to the stiffness of the spunbond nonwoven laminate in the machine direction (MD).

[0010] In the context of the present invention, the term "spunbond nonwoven laminate" refers in particular to a nonwoven which is constructed as a laminate having at least two spunbond nonwoven layers. Here and hereinafter, the term "laminate" is also simply used instead of the term "spunbond nonwoven laminate". Furthermore, a laminate or spunbond nonwoven laminate refers in particular to a finished, preferably pre-consolidated and / or finally consolidated laminate.

[0011] It is suggested to use continuous filaments with natural curl or potential curl tendency as the continuous filaments of at least one curled spunbond nonwoven layer.Preferably, at least one curled spunbond nonwoven layer has at least 90% by weight, preferably at least 95% by weight, very particularly preferably at least 98% by weight of curled continuous filaments.Very particularly preferably, at least one curled spunbond nonwoven layer is composed of curled continuous filaments or is substantially composed of curled continuous filaments.Suitably, natural curl or potential curl tendency is produced by selecting raw materials and / or process settings.For this reason, preferably at least one first polymer component with a low melting point and at least one second polymer component with a higher melting point (compared with it) are used for the continuous filaments of at least one curled spunbond nonwoven layer.Within the scope of the present invention, higher melting point and low melting point refer in particular to the melting temperature of polymer components here.But in principle, the first and second polymer components of the continuous filaments of at least one curled spunbond nonwoven layer can also have the same melting temperature, and at this time, curling or curling tendency can also be realized by other different characteristics of polymer components.

[0012] According to the present invention, at least one reinforcement spunbond nonwoven layer is made up of non-curled continuous filaments and / or is made up of or is substantially made up of continuous filaments less curled than the continuous filaments of the at least one curled spunbond nonwoven layer.Within the scope of the present invention, at least one reinforcement spunbond nonwoven layer especially determines the mechanical stability or longitudinal rigidity of the spunbond nonwoven laminate, in addition, the construction of the continuous filaments of at least one reinforcement spunbond nonwoven layer preferably contributes to favorable wear resistance and contributes to avoiding the delamination process in the spunbond nonwoven laminate of the present invention.At least one reinforcement spunbond nonwoven layer is made up of or is substantially made up of continuous filaments less curled than the continuous filaments of the at least one curled spunbond nonwoven layer, which in particular means within the scope of the present invention that the curl of the continuous filaments of at least one reinforcement spunbond nonwoven layer is less than the curl of the continuous filaments of at least one curled spunbond nonwoven layer.

[0013] Here, the curl of the continuous filaments of a spunbond nonwoven layer is less than the curl of the continuous filaments of another spunbond nonwoven layer, and in particular refers to that the continuous filaments have less curl or arc (number of arcs) per centimeter of filament length and / or have a larger curl diameter or arc diameter than the continuous filaments of another spunbond nonwoven layer. Here, the number of curling turns or curling arcs per centimeter of filament length is measured in particular according to Japanese standard JIS L-1015-1981, wherein the curling under the pretension of 2mg / den in (1 / 10mm) is counted based on the length of the curled filaments under pretension. The number of turns or curling arcs is determined with a sensitivity of 0.05mm. This measurement is suitably performed using the "Favimat" instrument of German TexTechno company. See, in this regard, the publication “Automatic Crimp Measurement on Staple Fibers”, Denkendorf Kollquium, Textile Mess- und Prüftechnik, November 9, 1999, Dr. Ulrich Mörschel (see in particular page 4, Figure 4 ). For this reason, the filaments (or filament samples) are removed from the web laying device or web laying belt as a filament mass before further consolidation, and the filaments are separated and measured. The arc diameter is suitably measured in the following manner: the nonwoven to be measured is placed under a microscope and a still image is generated using a suitable magnification, and the arc diameter can be measured therein. In the case of a nonwoven aggregate or nonwoven laminate with multiple plies or layers, the optical system must be focused on the surface of each visible ply or layer, respectively, so that other surfaces or plies or layers are located outside the depth of field as much as possible. Due to the random distribution of the filaments or the random distribution of the arc diameter, at least 25 measured values ​​are required respectively. The arithmetic mean is given.

[0014] According to the present invention, the continuous filaments of at least one reinforcement spunbond nonwoven layer have at least one, particularly one or only one bonding component arranged on its surface. According to the present invention, the continuous filaments of at least one crimped spunbond nonwoven layer have at least one first polymer component preferably with a low melting point. Within the scope of the present invention, it is suitable to realize the connection between at least one reinforcement spunbond nonwoven layer and at least one crimped spunbond nonwoven layer, and in particular realize the connection between the bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer and at least one first polymer component preferably with a low melting point of the crimped spunbond nonwoven layer. This can be realized in particular by consolidation measures or by the effect of pressure and / or temperature.

[0015] According to the invention, the difference in melting temperature between the bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer and the first preferably low-melting component of the continuous filaments of the at least one crimped spunbond nonwoven layer is less than 15° C. The melting temperatures of the components of the continuous filaments, in particular the melting temperatures of the materials or polymers used, are measured within the scope of the invention by means of dynamic differential scanning calorimetry (DSC) according to ISO 11357-3:2011. If the difference in melting temperature between the bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer and the first preferably low-melting component of the continuous filaments of the crimped spunbond nonwoven layer is 0° C. or approximately 0° C. according to a preferred embodiment, this means in particular that the two components have the same melting temperature or essentially the same melting temperature. This can be achieved by two different components or materials having the same melting temperature or by having the material of the first preferably low-melting polymer component of the continuous filaments of the at least one crimped spunbond nonwoven layer correspond to the material of the bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer. Therefore, according to a preferred embodiment, in terms of the materials or polymers used, the bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer corresponds to the preferably low-melting first polymer component of the continuous filaments of at least one crimped spunbond nonwoven layer. Within the scope of the present invention, the melting temperature of the bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer is higher or lower than the melting temperature of the preferably low-melting first polymer component of the continuous filaments of at least one crimped spunbond nonwoven layer.

[0016] The spunbond nonwoven laminate according to the invention is distinguished by satisfactory drape, in particular due to the advantageous low bending stiffness, and still has sufficient mechanical stability, in particular sufficient longitudinal stiffness. In addition, the delamination processes often observed in practice can be avoided in the spunbond nonwoven laminate according to the invention, so that the laminate also has a very advantageous wear resistance. By the special selection of the components or polymer components of the at least one curled spunbond nonwoven layer and the at least one reinforcing spunbond nonwoven layer, the bonding properties between the individual spunbond nonwoven layers of the spunbond nonwoven laminate are improved, so that delamination processes can be significantly reduced.

[0017] A preferred embodiment of the spunbond nonwoven laminate according to the invention is characterized in that the continuous filaments of at least one reinforcement spunbond nonwoven layer are monocomponent filaments, which consist of or essentially consist of a bonding component. Continuous filaments or monocomponent filaments consist of or essentially consist of a bonding component, which means in the scope of the present invention in particular that the continuous filaments of at least one reinforcement spunbond nonwoven layer have only a bonding component, and very particularly preferably have only one (first) polymer as a bonding component, or consist of or essentially consist of only one (first) polymer. This will be explained further below.

[0018] According to an alternative preferred embodiment of the spunbond nonwoven laminate of the present invention, the continuous filaments of at least one reinforcement spunbond nonwoven layer are multi-component filaments, in particular bi-component filaments, preferably multi-component filaments or bi-component filaments with a core-sheath configuration, particularly preferably multi-component filaments or bi-component filaments with a central or symmetrical core-sheath configuration and / or with an eccentric core-sheath configuration, and very particularly preferably, at least one bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer forms the sheath component of the continuous filaments with a core-sheath configuration. In addition, within the scope of the present invention, the continuous filaments of the at least one reinforcement spunbond nonwoven layer constructed as multi-component filaments or bi-component filaments have another symmetrical cross-sectional configuration, such as a trilobal configuration or a mono-type configuration, etc. Furthermore, “at least one bonding component is arranged on the surface of the continuous filaments of the reinforcing spunbond nonwoven layer according to the present invention” means in particular that the bonding component is arranged at least on the surface of the continuous filaments, for example in the case of the above-mentioned single-component filaments or in the case of the above-mentioned filaments having a sheath-core configuration, wherein the bonding component preferably forms a sheath component.

[0019] If the continuous filaments of at least one reinforcing spunbond nonwoven layer are configured as multicomponent filaments or bicomponent filaments with a core-sheath configuration, within the scope of the present invention, the continuous filaments of the reinforcing spunbond nonwoven layer with a core-sheath configuration have a core-to-sheath mass ratio of 50: 50 to 95: 5, preferably 55: 45 to 85: 15, preferably 60: 40 to 80: 20. This embodiment is based in particular on the recognition that with such a mass ratio a particularly good balance between longitudinal stiffness and abrasion resistance of the resulting spunbond nonwoven laminate can be achieved or delamination processes can be avoided.

[0020] A particularly recommended embodiment of the spunbond nonwoven laminate according to the present invention is characterized in that the melting temperature of the bonding component of the continuous filaments of the reinforcing spunbond nonwoven layer is lower than the melting temperature of the preferably higher melting point second polymer component of the continuous filaments of the at least one curled spunbond nonwoven layer, and wherein the melting temperature difference between the preferably higher melting point second polymer component of the continuous filaments of the at least one curled spunbond nonwoven layer and the bonding component of the continuous filaments of the at least one reinforcing spunbond nonwoven laminate is preferably at least 2°C, preferably at least 5°C, and particularly preferably at least 7°C.

[0021] For the case where the first and second polymer components of the continuous filaments of at least one curled spunbond nonwoven layer have the same melting temperature, it is appropriate to use this melting temperature as a basis to determine the melting temperature difference between the second polymer component of the continuous filaments of at least one curled spunbond nonwoven layer and the bonding component of the continuous filaments of at least one reinforcement spunbond nonwoven layer. The preferred embodiment in which the melting temperature of the bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer is lower than the melting temperature of the preferably higher melting point second polymer component of the continuous filaments of at least one curled spunbond nonwoven layer is based on such recognition that the continuous filaments of the reinforcement spunbond nonwoven layer then have very good bonding properties relative to the continuous filaments of at least one curled spunbond nonwoven layer. In this way, the delamination between the reinforcement spunbond nonwoven layer and the at least one curled spunbond nonwoven layer can be further reduced, and in this regard, the resulting spunbond nonwoven laminate also has very satisfactory wear resistance.

[0022] A particularly preferred embodiment of the spunbond nonwoven laminate according to the invention is characterized in that the continuous filaments of at least one reinforcement spunbond nonwoven layer are oriented in the machine direction (MD) to a higher degree than the continuous filaments of at least one curled spunbond nonwoven layer. This embodiment is based in particular on the recognition that at least one reinforcement spunbond nonwoven layer has a particularly advantageous longitudinal stiffness. Preferably, at least one reinforcement spunbond nonwoven layer has a higher longitudinal stiffness than at least one curled spunbond nonwoven layer. Within the scope of the present invention, the orientation of the continuous filaments of the reinforcement spunbond nonwoven layer and / or the continuous filaments of at least one curled spunbond nonwoven layer in the machine direction (MD) can be determined in particular by means of micro-computed tomography (μCT), preferably as described in WO 2020 / 103964 A1, in particular on pages 50 to 53, "Method for determining geometric fiber statistics of nonwovens".

[0023] It is very preferred that the titer of the continuous filaments of at least one reinforcement spunbond nonwoven layer is less than 2.5 denier, in particular less than 1.7 denier, preferably less than 1.5 denier, preferably 1.0 denier to 1.4 denier, particularly preferably 1.2 denier to 1.4 denier, and / or the titer of the continuous filaments of at least one crimped spunbond nonwoven layer is less than 3.0 denier, preferably less than 2.0 denier, preferably less than 1.7 denier, particularly preferably 1.0 denier to 1.6 denier, very particularly preferably 1.2 denier to 1.4 denier. Within the scope of the present invention, the titer of the continuous filaments of at least one reinforcement spunbond nonwoven layer is less than the titer of the continuous filaments of at least one crimped spunbond nonwoven layer.

[0024] Preferably, at least one bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer has a first polymer, in particular, is composed of or substantially composed of a first polymer, wherein the first polymer is preferably a homopolymerized polyolefin, in particular a homopolymerized polypropylene and / or a homopolymerized polyethylene, and / or a polyolefin copolymer, in particular a polypropylene copolymer and / or a polyethylene copolymer. If the first polymer is a homopolymerized polypropylene, within the scope of the present invention, it is a polypropylene polymerized by a metallocene catalyst. If the first polymer is a polypropylene copolymer, preferably, it is a propylene-α-olefin copolymer. Particularly preferably, the first polymer is a polypropylene copolymer and / or a homopolymerized polypropylene, in particular a homopolymerized polypropylene polymerized by a metallocene catalyst. When it is mentioned within the scope of the present invention that a component is composed of a polymer or is substantially composed of a polymer, "substantially composed of..." particularly means that at least 90% by weight, preferably at least 95% by weight, preferably at least 98% by weight of the component is composed of the polymer shown, and in particular, considering the following situation, that in addition to the polymer, a small amount of additives, such as plasticizers, fillers, colorants, lubricants, etc., may also be present.

[0025] Another preferred embodiment of the present invention is characterized in that the at least one bonding component of the reinforcement spunbonded nonwoven layer is composed of or essentially consists of a mixture or blend of at least one first polymer and at least one second polymer, and wherein preferably the first polymer and / or the second polymer are homopolymerized polyolefins, in particular homopolymerized polypropylene and / or homopolymerized polyethylene, and / or polyolefin copolymers, in particular polypropylene copolymers and / or polyethylene copolymers. If the first polymer and / or the second polymer are homopolymerized polypropylene, within the scope of the present invention, they are polypropylene polymerized by metallocene catalysis. If the first polymer and / or the second polymer are polypropylene copolymers, preferably, they are propylene-α-olefin copolymers.

[0026] According to a preferred embodiment of the spunbond nonwoven laminate according to the present invention, the continuous filaments of at least one reinforcement spunbond nonwoven layer are configured as bicomponent filaments with a sheath-core configuration, wherein suitably, the at least one, in particular the one, bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer forms the sheath component of the continuous filaments with a sheath-core configuration. Suitably, the bonding component forming the sheath component is composed of or essentially consists of at least one first polymer or a mixture or blend of at least one first polymer and at least one second polymer according to the above description.

[0027] A preferred embodiment of the present invention is characterized in that the core component of the continuous filaments with a core-sheath configuration of at least one reinforcement spunbond nonwoven layer is at least one homopolymerized polyolefin, particularly at least one homopolymerized polypropylene and / or at least one homopolymerized polyethylene, and / or at least one polyolefin copolymer, particularly at least one polypropylene copolymer and / or at least one polyethylene copolymer. If the core component of the continuous filaments with a core-sheath configuration of at least one reinforcement spunbond nonwoven layer is at least one homopolymerized polypropylene, then within the scope of the present invention, it is a polypropylene polymerized by metallocene catalysis or by Ziegler-Natta catalysis. When the core component of the continuous filaments with a core-sheath configuration of the reinforcement spunbond nonwoven layer is a polypropylene copolymer, it is preferably a propylene-α-olefin copolymer. It is also preferred that the core component of the continuous filaments with a core-sheath configuration of the reinforcement spunbond nonwoven layer is composed of only one polymer or is substantially composed of one polymer, and the polymer is suitably the polymer described above. But also can be in principle, the core component of the continuous filament with sheath-core configuration of the reinforcement spunbond nonwoven layer exists as a mixture or blend composed of at least two polymers. Very particularly preferably, the core component of the continuous filament with sheath-core configuration of the reinforcement spunbond nonwoven layer is at least one homopolypropylene, especially composed of at least one homopolypropylene or basically composed of it. Homopolypropylene is preferably a polypropylene polymerized by metallocene catalysis or by Ziegler-Natta catalysis. Within the scope of the present invention, at least one reinforcement spunbond nonwoven layer has a core and a skin of the continuous filament with sheath-core configuration is all composed of polyolefin copolymers, especially composed of polypropylene copolymers or basically composed of it. So, the copolymer used in the skin preferably has a higher comonomer content than the copolymer used in the core.

[0028] A particularly preferred embodiment of the spunbond nonwoven laminate according to the present invention is characterized in that the first polymer component with a preferably low melting point and / or the second polymer component with a preferably higher melting point of the continuous filaments of at least one curled spunbond nonwoven layer are at least one homopolymerized polyolefin, particularly at least one homopolymerized polypropylene and / or at least one homopolymerized polyethylene, and / or at least one polyolefin copolymer, particularly at least one polypropylene copolymer and / or at least one polyethylene copolymer. Preferably, the first polymer component with a preferably low melting point of the continuous filaments of at least one curled spunbond nonwoven layer and / or the second polymer component with a preferably higher melting point of the continuous filaments of at least one curled spunbond nonwoven layer are respectively composed of at least one polymer, especially only composed of one polymer or are substantially composed of it, and the plastic polymer is one of the above-mentioned polymers. But in principle, it is also within the scope of the present invention that the first polymer component with a preferably low melting point of the continuous filaments of at least one curled spunbond nonwoven layer and / or the second polymer component with a preferably higher melting point of the continuous filaments of at least one curled spunbond nonwoven layer exist as a mixture or blend of at least two polymers. If the first and / or second polymer component of the continuous filaments of the at least one crimped spunbond nonwoven layer is at least one polypropylene copolymer, it is preferred that it is at least one propylene-α-olefin copolymer. If the first and / or second polymer component of the continuous filaments of the at least one crimped spunbond nonwoven layer is at least one homopolypropylene, it is within the scope of the present invention that it is at least one polypropylene polymerized by Ziegler-Natta catalysis.

[0029] A particularly preferred embodiment of the present invention is characterized in that the bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer and / or the first polymer component of the continuous filaments of the at least one curled spunbond nonwoven layer, preferably with a low melting point, and / or the second polymer component of the continuous filaments of the at least one curled spunbond nonwoven layer, preferably with a higher melting point, are respectively based on polyolefins selected from the same polyolefin material group, in particular based on polypropylene. If the continuous filaments of at least one reinforcement spunbond nonwoven layer are configured as multi-component filaments or bi-component filaments with a core-sheath configuration according to a particularly preferred embodiment of the present invention, wherein the bonding component forms the sheath component, it is particularly preferred that the core component of the continuous filaments with a core-sheath configuration of the reinforcement spunbond nonwoven layer is also based on a polyolefin selected from the same polyolefin material group as the bonding component, the first and second polymer components. Within the scope of the present invention, the same polyolefin material group refers in particular to a polyolefin constructed based on the same olefin monomer, so that for example homopolypropylene and polypropylene copolymers all belong to the same polyolefin material group, i.e. based on propylene.

[0030] In the scope of the present invention, the continuous filaments of at least one crimped spunbond nonwoven layer are multicomponent filaments, particularly bicomponent filaments, with side-by-side configuration and / or with a core-sheath configuration, preferably with an eccentric core-sheath configuration, and wherein preferably in the case of a core-sheath configuration or an eccentric core-sheath configuration, the first polymer component with a preferred low melting point of the continuous filaments of the at least one crimped spunbond nonwoven layer forms a sheath component. Then, the second polymer component with a preferred higher melting point of the continuous filaments of the at least one crimped spunbond nonwoven layer preferably forms a core component. In the case of continuous filaments with a side-by-side configuration, preferably, the first and second polymer components form a side of the filaments respectively. In addition, the term "configuration of continuous filaments" refers in particular to the cross-sectional configuration of the filaments within the scope of the present invention.

[0031] It is very particularly preferred that the first polymer component with a preferred low melting point of the continuous filaments of at least one curled spunbond nonwoven layer is a polypropylene copolymer and is particularly composed of or is substantially composed of a polypropylene copolymer. Within the scope of the present invention, it is the same polypropylene copolymer, which preferably forms the first polymer of the bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer. It is further preferred that the second polymer component with a preferred higher melting point of the continuous filaments of at least one curled spunbond nonwoven layer is at least one homopolypropylene and is particularly composed of or is substantially composed of a homopolypropylene. Homopolypropylene is preferably a polypropylene polymerized by Ziegler-Natta catalysis. According to one embodiment, the homopolypropylene of the second polymer component with a preferred higher melting point of the at least one curled spunbond nonwoven layer and the homopolypropylene of the core component of the continuous filaments with a skin-core configuration preferably used for reinforcement of the spunbond nonwoven layer are identical or different homopolypropylenes.

[0032] If the continuous filaments of at least one curled spunbond nonwoven layer are multi-component filaments, particularly bi-component filaments, with an eccentric sheath-core configuration, then within the scope of the present invention, the sheath of the filaments and the core of the filaments (observed in the cross section of the filaments) are both circularly constructed. According to another preferred embodiment of the present invention, the multi-component filaments or bi-component filaments are configured as multi-component filaments or bi-component filaments with an eccentric sheath-core configuration, and the cores of these filaments (observed in the cross section of the filaments) are configured as fans, and with respect to their peripheries, they have arc-shaped peripheral sections and linear peripheral sections, so that a D-shaped core is observed on the cross section of the filaments. In addition, the above-mentioned embodiment of the cross-sectional design of the continuous filaments with an eccentric sheath-core configuration is also applicable to the embodiment of the spunbond nonwoven laminate according to the present invention, wherein the continuous filaments of at least one reinforcement spunbond nonwoven layer are configured as multi-component filaments, particularly bi-component filaments, with an eccentric sheath-core configuration.

[0033] It has been demonstrated that the mass ratio of the preferably low-melting first polymer component of the continuous filaments of the at least one curled spunbond nonwoven layer to the preferably higher-melting second polymer component of the at least one curled spunbond nonwoven layer is 10:90 to 60:40, preferably 25:75 to 50:50, preferably 30:70 to 40:60.

[0034] A very particularly preferred embodiment of the spunbond nonwoven laminate according to the present invention is characterized in that there is at least one second curled spunbond nonwoven layer, and wherein the at least one reinforcement spunbond nonwoven layer is preferably arranged between the at least two curled spunbond nonwoven layers, in particular between the two curled spunbond nonwoven layers. Therefore, it is very particularly preferred that the spunbond nonwoven laminate according to the present invention is at least three-layer, in particular three-layer, and has a first curled spunbond nonwoven layer, a reinforcement spunbond nonwoven layer preferably arranged above it, and a second curled spunbond nonwoven layer preferably arranged above the reinforcement spunbond nonwoven layer. It has been shown that by this at least three-layer, in particular three-layer laminate with a reinforcement spunbond nonwoven layer arranged between two curled spunbond nonwoven layers, the technical problem of the present invention is particularly functionally and reliably solved, and in particular a particularly favorable balance between longitudinal stiffness, drape and wear resistance can be achieved. In addition, it is preferred that the above-mentioned embodiments of the structure of the curled spunbond nonwoven layer or the first curled spunbond nonwoven layer are also applicable to the structure of the second curled spunbond nonwoven layer.Preferably, the first curled spunbond nonwoven layer and the second curled spunbond nonwoven layer are identical or substantially identical in their structure.But the first and second curled spunbond nonwoven layers can also be different in their structure and their characteristics in principle.If there are at least two curled spunbond nonwoven layers according to a preferred embodiment of the spunbond nonwoven laminate of the present invention, it is possible that the two curled spunbond nonwoven layers have the same curl or substantially the same curl.But it is also possible that at least two curled spunbond nonwoven layers have different curls, but the curl is higher than the curl of the continuous filaments of the reinforcement spunbond nonwoven layer respectively.

[0035] In the context of the present invention, the ratio of the tensile strength of the laminate in the machine direction (MD) to the tensile strength of the laminate in the direction transverse to the machine direction (CD) is 1.0 to 2.5, preferably 1.1 to 2.3, preferably 1.2 to 2.0, particularly preferably 1.3 to 1.9. Suitably, the tensile strength of the laminate in the machine direction (MD direction) is at least 8 N / 5 cm, in particular at least 10 N / 5 cm, preferably at least 15 N / 5 cm, preferably at least 17.5 N / 5 cm, particularly preferably at least 20 N / 5 cm, very particularly preferably at least 22.5 N / 5 cm, for example at least 28 N / 5 cm. Further preferably, the tensile strength of the nonwoven in the direction transverse to the machine direction (CD direction) is at least 6 N / 5 cm, in particular at least 8 N / 5 cm, preferably at least 10 N / 5 cm, preferably at least 12 N / 5 cm, particularly preferably at least 15 N / 5 cm. In the context of the invention, the tensile strength of the nonwoven is determined in particular according to the following method: “Determination of tensile strength (based on Edana 20.2-89)”: unit N / 5 cm; sample width 50 mm; clamping length 100 mm; test speed 200 mm / min.

[0036] A preferred embodiment of the spunbonded nonwoven laminate of the present invention is characterized in that, for the laminate, a tensile force of greater than 3.0 N / 5 cm, preferably greater than 4.0 N / 5 cm, preferably greater than 4.5 N / 5 cm is generated in the machine direction (MD) at an elongation of 5%, and / or a tensile force of greater than 5.0 N / 5 cm, preferably greater than 6.0 N / 5 cm, particularly preferably greater than 7.0 N / 5 cm is generated at an elongation of 10%. The tensile force is measured in the machine direction (MD) at a given elongation or stress-elongation curve, in particular according to the test standard DIN EN 29073-3. Within the scope of the present invention, a nonwoven sample or laminate sample with a width of 50 mm is clamped between two clamping devices at a spacing of 100 mm, so that the length of the sample under investigation / measured is 100 mm. Subsequently, the nonwoven sample or laminate sample is tensioned with the aid of a stretching machine at a feed rate of 100 mm / min until the preload is 0.5 N. The measurement is then reset to zero in this state and the actual measurement is started. Here, the stretching machine operates at a feed rate or stretching rate of 200 mm / min. As mentioned above, the tensile force in the machine direction (MD) is the force of the sample at an elongation of 5% and / or the force of the sample at an elongation of 10%, determined by the stress-elongation curve. Here, the tensile force in the machine direction (MD) is in particular a measure of the longitudinal stiffness of the spunbonded nonwoven laminate.

[0037] According to a particularly recommended embodiment of the present invention, the spunbonded nonwoven laminate has an embossed pattern, wherein the embossed pattern consists of a plurality of (preferably not interconnected) embossed portions, wherein the embossed portions each have a diameter of 0.05 to 0.3 mm. 2 , preferably 0.06 to 0.2 mm 2 , preferably 0.07 to 0.18 mm 2 , particularly preferably 0.08 to 0.15 mm 2 and very particularly preferably from 0.09 to 0.12 mm 2 In the context of the present invention, the term "embossed portion" refers in particular to a compacted location of the laminate or nonwoven at which the laminate has a smaller thickness than its non-embossed regions and at which the fibers of the laminate are at least partially connected or fused to one another, preferably by the action of pressure and / or temperature. The embossed portion of the embossed pattern is preferably produced by at least one calender roller having a complementary embossed pattern consisting of embossing elements.

[0038] In the scope of the present invention, the term "embossing pattern" refers in particular to a pattern formed by a plurality of embossing portions of a laminate or nonwoven. The embossing pattern can be a regular and / or irregular embossing pattern. Then, each embossing portion is preferably distributed on the laminate at regular intervals, preferably at the same intervals. Further preferably, according to a preferred embodiment of the present invention, the embossing surface of each embossing portion of the embossing pattern is the same size or substantially the same size. It has been confirmed that the geometry of the embossing surface of each embossing portion is the same or substantially the same. Very particularly preferably, the embossing pattern has the same or same size embossing portion or substantially the same or substantially the same size embossing portion, wherein the embossing portions with the same geometry or substantially the same geometry are uniformly distributed. But in principle it is also possible that each embossing portion of the embossing pattern has different sizes and / or different geometries from each other, and / or the embossing portion is arranged on the nonwoven with an irregular embossing pattern. In addition, the geometry of the embossing portion refers in particular to the geometry of the embossing surface of the embossing portion in the top view within the scope of the present invention.

[0039] The embossing surface of the embossing portion refers in particular to the embossed surface of the embossing portion within the scope of the present invention, wherein when determining the size of the embossing surface, the material protrusions or material flanges that may be formed during the pressing or embossing process and at least partially surround the embossing portion are in particular not part of the embossing surface of the embossing portion. In the case where the embossing portion or the embossing surface has a point-shaped or circular geometric shape in a top view, the embossing area of ​​the embossing portion corresponds, for example, to the area of ​​the point-shaped or circular embossing portion, wherein the material protrusions or material flanges that may surround the embossing portion are not included in the embossing area of ​​the embossing portion. The embossing portion of the nonwoven or laminate according to the present invention respectively has an embossing area within the above-mentioned range, which means in particular within the scope of the present invention that at least 95%, preferably at least 97%, of all embossing portions of the nonwoven have an embossing area within the above-mentioned range. Particularly preferably, all embossing portions of the nonwoven have an embossing area within the said range. In the context of the invention, the embossing surface of the embossing can be determined in particular by incident light or transmitted light 2D microscopy and / or by scanning electron microscopy (EM) and / or by micro-computed tomography (μCT). In the corresponding image evaluation, the embossing surface geometry or a geometry corresponding or substantially corresponding to the embossing surface geometry is preferably used as the basis and is provided above the respective optically imaged embossing surface of the embossing for the evaluation.

[0040] In a preferred embodiment of the spunbond nonwoven laminate with an embossed pattern according to the present invention, the embossing portion has an embossing surface of the above-mentioned size. This preferred embodiment is based on the following recognition, that the spunbond nonwoven laminate is characterized by particularly favorable mechanical properties, while based on the specific size of the embossing surface it can still provide a laminate, in which the visual damage caused by the embossed pattern of the embossed portion can be almost completely avoided due to the relatively significant reduction in the perceptibility of the embossed pattern to the human eye.

[0041] In the scope of the present invention, the total embossing area of ​​the embossed pattern accounts for the total surface area of ​​the laminate in a ratio of 2 to 12%, preferably 2.5 to 8%, preferably 3 to 6%, particularly preferably 3.5 to 5.5% and very particularly 4 to 5%. In addition, in the scope of the present invention, the total embossing area of ​​the embossed pattern accounts for the total surface area of ​​the laminate in a ratio of less than 10%, preferably less than 8%, preferably less than 7.5%, very preferably less than 6.5%, particularly preferably less than 5.5%, very particularly preferably less than 5%. The visual perceptibility of the embossed pattern from the embossed portion can be further reduced by the total embossing area of ​​the embossed pattern that accounts for the total surface area of ​​the laminate or nonwoven. Nevertheless, a laminate with satisfactory mechanical properties is still obtained. The total embossing area of ​​the embossed pattern refers in the context especially to the sum of all embossing areas of the embossed pattern. The total surface area of ​​a laminate or nonwoven refers in the scope of the present invention especially to the whole laminate surface area including embossed and non-embossed regions.

[0042] It is very preferred that the minimum spacing d of the two embossing portions of the embossed pattern is respectively 0.6 to 2.5 mm, preferably 0.8 to 2.0 mm, preferably 0.9 to 1.8 mm, particularly preferably 0.95 to 1.6 mm and very particularly preferably 1.0 to 1.5 mm. Suitably, the minimum spacing d of the two embossing portions of the embossed pattern is respectively at least 0.6 mm, particularly at least 0.8 mm, preferably at least 1.0 mm, particularly preferably at least 1.4 mm and very particularly preferably at least 2.0 mm. The minimum spacing d of the two embossing portions of the embossed pattern refers in particular to the minimum spacing d of the two directly adjacent embossing portions of the embossed pattern, that is, the minimum distance of an embossing portion of the preferred embossed pattern to the embossing portion closest to it. In addition, the minimum spacing d of the two embossing portions of the embossed pattern refers in particular to the minimum spacing between the embossing boundaries of the two embossing portions, i.e. the minimum spacing of the two embossing portions along the non-embossed surface of the nonwoven fabric located between them. This embodiment is based on the recognition that the visual perceptibility of the embossed pattern from the embossed portion can be further reduced while still ensuring favorable mechanical properties of the laminate. The above-mentioned minimum spacing of two embossed portions of the embossed pattern is preferably at least 95%, preferably at least 97% of all embossed portions of the laminate. Particularly preferably, the above-mentioned minimum spacing of two embossed portions relates to all embossed portions of the laminate.

[0043] It is recommended that the embossing surface of the embossing part has at least one geometric shape selected from the following group in a top view: "point or circle, ellipse, square, rectangle, rhombus, polygon, line, wave". As already described above, the embossing surface of the embossing part refers in particular to the embossed surface of the embossing part, without material protrusions or material flanges that may be surrounded by the embossing surface. Preferably, the individual embossing surfaces or individual embossing parts of the embossing pattern have the same or essentially the same geometric shape. However, in principle, it also belongs to the scope of the present invention that the embossing pattern has embossing surfaces or embossing parts with different geometric shapes. A particularly preferred embodiment of the present invention is characterized in that the embossing part or the embossing surfaces of all embossing parts are dot-shaped or circular in a top view.

[0044] A preferred embodiment of the present invention is characterized in that the laminate or nonwoven has a weight of less than 200 g / m 2 , especially less than 150 g / m 2 , preferably less than 100 g / m 2 , preferably less than 75 g / m 2 , particularly preferably less than 50 g / m 2 and very particularly preferably less than 30 g / m 2 It is particularly preferred that the laminate has a unit area weight of 10 g / m 2Up to 80 g / m 2 , preferably 15 g / m 2 Up to 60 g / m 2 , preferably 15 g / m 2 Up to 30 g / m 2 According to another preferred embodiment of the present invention, the unit area weight of the laminate is 11 g / m 2 Up to 60 g / m 2 , preferably 12 g / m 2 Up to 30 g / m 2 .

[0045] It is further preferred that the nonwoven fabric or laminate has a thickness h of 0.1 to 0.85 mm, preferably 0.15 to 0.75 mm, preferably 0.2 to 0.65 mm, particularly preferably 0.25 to 0.55 mm. Within the scope of the present invention, the nonwoven fabric has a thickness h of less than 0.85 mm, preferably less than 0.75 mm, particularly preferably less than 0.65 mm, particularly preferably less than 0.5 mm, very preferably less than 0.45 mm, very particularly preferably less than 0.4 mm, for example less than 0.35 mm. The thickness h here refers to the maximum thickness or total thickness of the laminate transversely, in particular perpendicularly or substantially perpendicularly to the planar extension direction of the laminate in the non-embossed area of ​​the laminate. The thickness or total thickness h of the nonwoven is measured in particular according to method WRT 120.6 (05) option A. Within the scope of the present invention, the thickness h refers in particular to the finished, optionally pre-consolidated and / or finally consolidated laminate.

[0046] One embodiment of the invention that has proven to be very suitable is characterized in that the laminate has an abrasion resistance of at least 2 according to the Martindale scale, preferably an abrasion resistance of 1 according to the Martindale scale. This embodiment is based on the recognition that the laminate or nonwoven is characterized by a very satisfactory abrasion resistance and in particular also avoids delamination processes of the laminate during the Martindale test. Within the scope of the present invention, the abrasion resistance of the laminate or nonwoven is determined in particular using a Martindale abrasion test device according to the following test method:

[0047] In particular, the device "SDL Atlas M235 Martindale Tester" is used as the test device. The procedure for determining the wear resistance is preferably based on WSP 20.5 (05), wherein in particular the following deviations from WSP 20.5 (05) are made: the surfaces (top / bottom) are tested individually; at least 10, preferably at least 20 tests are carried out for each sample and surface, wherein the test pieces are taken uniformly from the sample surface, and the final result is the arithmetic mean. The test specimen should be taken from a representative position, i.e. not just from the edge, for example, because the test or result deviations should not be affected by macroscopic deviations (e.g. poor process control), but only by typical (local) fluctuations; the test specimen is tensioned on a standard felt and mounted in the lower fixture; the same nonwoven is used as the moving upper friction surface, the test surfaces are pressed against each other, and this nonwoven is fixed together with a PU foam block (e.g. a foam block from SDL Atlas); the contact pressure is 9 kPa; 32 cycles, i.e. two complete cycles of the Lissajous figure; the counterparts (test specimen and upper friction surface) are replaced after each test;

[0048] The samples are rated on a scale of 1 to 5, with 1 being the highest score. For example, if the average value for the top surface is 1 and the average value for the bottom surface is 3, the sample is rated 1 overall. Only changes in the nonwoven are evaluated, and if the nonwoven has previously had similar defects, these are disregarded. In this context, for example, fiber strands refer to groups or bundles of fibers on the surface. If a test specimen clearly has such a defect from the outset, the test specimen in question must be excluded.

[0049] 1 point: Almost no changes can be observed from above. Slight looseness of the surface is allowed, in which case only the filaments are allowed to loosen, but no larger or longer agglomerations are allowed. When observed from the side, the height of the loose filaments should not exceed 5 mm. Single filaments or multiple filaments are allowed to gather into small balls with a diameter of less than 2 mm.

[0050] 2 points: In addition to the above damage pattern (1 point): The filaments are loose and entangled with adjacent filaments to form elongated agglomerates. These groups of filaments are called "strands" or "threads or bundles". These strands are 5 to 40 mm long and are connected to the substrate at least every 10 mm of their length. The maximum height of a strand is 5 mm (5 mm above the surface) and the maximum width is 2 mm.

[0051] 3 points: The "strands" are no longer connected to the substrate along their length, the possible connections are >10 mm above and below each other, or the strands are only connected to the sample at the start and end points. It is possible to lift and move these strands, for example with a needle.

[0052] 4 points: The strands connect to adjacent strands to form a web. A "spider web."

[0053] 5 points: The sample is further damaged and holes are formed for the first time.

[0054] A proven suitable embodiment of the invention is characterized in that the laminate or nonwoven is consolidated with at least one calender roller, in particular for the production of the above-mentioned preferably provided embossed pattern, and preferably with at least one hot fluid main consolidation device, in particular with at least one hot air main consolidation device. The at least one calender roller is preferably part of a calender, which preferably comprises at least two calender rollers or at least one calender roller pair. When the laminate is consolidated according to a preferred embodiment with at least one calender roller, in particular for the production of an embossed pattern, and with at least one hot fluid main consolidation device, in particular a spunbond nonwoven laminate is obtained, which is distinguished by further improved mechanical stability, advantageously lower bending stiffness, and further preferably satisfactory wear resistance, and further preferably advantageous optical properties.

[0055] In order to solve this technical problem, the present invention also teaches a method for producing a spunbond nonwoven laminate (especially the aforementioned spunbond nonwoven laminate), wherein the spunbond nonwoven laminate has at least two spunbond nonwoven layers made of continuous filaments, wherein crimped continuous filaments are produced and laid into at least one crimped spunbond nonwoven layer, wherein the crimped continuous filaments of the crimped spunbond nonwoven layer are multi-component filaments, especially bi-component filaments, which have at least one first polymer component with a preferably low melting point and at least one second polymer component with a preferably higher melting point,

[0056] wherein non-crimped continuous filaments and / or continuous filaments which are less crimped than the continuous filaments of the at least one crimped spunbond nonwoven layer are produced and laid to form at least one reinforcing spunbond nonwoven layer, in particular laid over the at least one crimped spunbond nonwoven layer, wherein the continuous filaments of the reinforcing spunbond nonwoven layer have at least one bonding component arranged on their surface,

[0057] wherein the melting temperature difference between the bonding component of the continuous filaments of the reinforcing spunbond nonwoven layer and the preferably low-melting first polymer component of the continuous filaments of the crimped spunbond nonwoven layer is less than 15° C., preferably less than 12° C., preferably less than 8° C., particularly preferably less than 5° C., very preferably less than 3° C., very particularly preferably less than 2° C., for example 0° C. or about 0° C.,

[0058] And wherein the laminate has a cantilever maximum bending stiffness of at most 100 mm, preferably at most 90 mm, preferably at most 80 mm, particularly preferably at most 75 mm and very particularly preferably at most 70 mm.

[0059] Within the scope of the method according to the invention, it is preferred that curled continuous filaments are produced and laid into at least one second curled spunbond non-woven layer, in particular laid over at least one reinforcing spunbond non-woven layer, so that very particularly preferably at least three-layer laminate, in particular a three-layer laminate, is obtained, wherein the at least one reinforcing spunbond non-woven layer forms the intermediate layer.

[0060] It is particularly preferred that the laminate is consolidated or final consolidated by means of at least one calender roller, and that an embossing pattern, preferably consisting of a plurality of embossings, is introduced into the laminate by means of the at least one calender roller, wherein the embossings preferably each have a diameter of 0.05 to 0.3 mm. 2 , preferably 0.06 to 0.2 mm 2 , preferably 0.07 to 0.18 mm 2 , particularly preferably 0.08 to 0.15 mm 2 and very particularly preferably from 0.09 to 0.12 mm 2 The stamping surface.

[0061] Within the scope of the method according to the invention, the laminate or nonwoven is consolidated, in particular main consolidated, by means of at least one hot fluid main consolidation device, in particular by means of at least one hot air main consolidation device (preferably after consolidation by means of at least one calender roller, in particular by means of at least one calender having a calender roller or a pair of calender rollers). According to another preferred embodiment of the method according to the invention, after the laminate is laid on a web laying device, in particular on a web laying screen belt, it is first pre-consolidated by means of at least one pre-consolidation device, in particular by means of at least one hot fluid pre-consolidation device, preferably by means of at least one hot air pre-consolidation device, preferably subsequently consolidated by means of at least one calender roller, and subsequently consolidated, in particular main consolidated, preferably by means of a hot fluid main consolidation device or a hot air main consolidation device. Within the scope of the invention, pre-consolidation refers in particular to consolidating a laminate or a layer of a laminate, which ensures transportability but preferably results in a lower degree of consolidation of the laminate than would be achieved by means of consolidation or main consolidation.

[0062] In the scope of the present invention, the at least one crimped spunbond nonwoven layer, preferably the at least two crimped spunbond nonwoven layers and the at least one reinforcement spunbond nonwoven layer are manufactured according to the spunbond process or are manufactured as a spunbond layer. For this reason, continuous filaments are first ejected from a spinning head or a spinning plate. Subsequently, the ejected continuous filaments are suitably cooled in a cooling chamber and stretched in a stretching device. Here, cooling and stretching are particularly carried out in a combined cooling and stretching unit. It is recommended that the stretching of the continuous filaments is carried out as an aerodynamic stretching. In the scope of the present invention, the unit consisting of a cooling chamber and a stretching device or a combined cooling and stretching unit (except the air supply in the cooling chamber or the cooling unit) is configured as a closed system. This means that, except for the air supply in the cooling chamber or the cooling unit, there is no other air supply in the unit. This embodiment of a closed system has been proven to be particularly effective for manufacturing a laminate according to the present invention. According to a preferred embodiment of the present invention, the cooled and stretched continuous filaments of the spunbond nonwoven layer for the spunbond nonwoven laminate are guided through at least one diffuser and then laid on a laying device, in particular on a laying screen belt. Suitably, the continuous filaments for the (first) curled spunbond nonwoven layer are first laid on the laying device or on the laying screen belt, then the continuous filaments for the reinforcement spunbond nonwoven layer are laid on the laying device or on the laying screen belt, and according to a preferred embodiment, the continuous filaments for the second curled spunbond nonwoven layer are then laid on the laying device or on the laying screen belt. In principle, other orders of the manufacture and laying of each spunbond nonwoven layer and other layer structures of the laminate obtained therefrom are also possible.

[0063] The present invention is based on such recognition, that the outstanding feature of the spunbond nonwoven laminate according to the present invention is that it has optimally balanced mechanical stability, particularly sufficient longitudinal rigidity and satisfactory drapability, particularly favorable low bending stiffness, and it still has sufficient abrasion resistance. In the spunbond nonwoven laminate according to the present invention, the delamination process can be avoided to the greatest extent. In the spunbond nonwoven laminate according to the present invention, at least one curled spunbond nonwoven layer particularly determines favorable drapability or low bending stiffness. At least one reinforcement spunbond nonwoven layer particularly helps the spunbond nonwoven laminate to exert its favorable mechanical stability, particularly satisfactory longitudinal stiffness. In addition, the coordination of the filament components of the reinforcement spunbond nonwoven layer or the reinforcement spunbond nonwoven layer and the filament components of at least one curled spunbond nonwoven layer helps to avoid the delamination process in the spunbond nonwoven laminate in an advantageous manner, and helps the spunbond nonwoven laminate to obtain further improved abrasion resistance. If, according to a preferred embodiment of the spunbond nonwoven laminate or the method according to the invention, an embossing pattern consisting of a plurality of embossing portions with a particular embossing area size is provided, this further contributes to the advantageous mechanical stability of the spunbond nonwoven laminate, wherein visual impairment of the spunbond nonwoven laminate is almost completely avoided by the embossing pattern. It should also be emphasized that the advantages according to the invention are achieved with relatively uncomplicated measures, so that the spunbond nonwoven laminate according to the invention and the method according to the invention for producing such a spunbond nonwoven laminate are also distinguished by advantageous economy.

[0064] The present invention is described in detail below by means of an embodiment that only shows a preferred embodiment of the present invention.Within the scope of the present invention and in the present embodiment, the spunbond nonwoven laminate of the present invention consisting of three spunbond nonwoven layers is manufactured by means of a three-box device.These three spunbond nonwoven layers are especially manufactured according to the spunbond process at this.Suitably, these three spunbond nonwoven layers are manufactured according to the Reicofil method, wherein the long filaments ejected by the spunbond nonwoven layer are first guided through a cooling chamber and cooled with cooling air there, and then introduced into the stretching unit for aerodynamic stretching.Suitably and in this embodiment, when manufacturing each spunbond nonwoven layer, the cooling and stretching unit of association is utilized to work, and this cooling and stretching unit is configured as a closed system.This means that, in this cooling and stretching unit, except the air supply in the cooling chamber, any other air supply is not carried out from the outside.After passing through the stretching unit, the long filaments of each spunbond nonwoven layer are all guided through a diffuser and then laid on the laying screen belt for the spunbond nonwoven layer.

[0065] In the scope of the present invention and in this embodiment, the (first) crimped spunbond nonwoven layer at the bottom is composed of crimped continuous filaments with an eccentric sheath-core configuration. The first polymer component of the continuous filaments, preferably and in this embodiment with a low melting point, is suitably and in this embodiment formed as a sheath component, and is preferably substantially composed of a polypropylene copolymer (Basell RP248R). The second polymer component of the continuous filaments of the (first) crimped spunbond nonwoven layer at the bottom, preferably and in this embodiment with a higher melting point, is preferably and in this embodiment formed as a core component, and is suitably substantially composed of homopolypropylene (Exxon PP3155E5), which is preferably and in this embodiment polymerized by Ziegler-Natta catalysis.

[0066] The continuous filaments of the reinforcement spunbond nonwoven layer are preferably and in this embodiment monocomponent filaments, which suitably and in this embodiment form the middle layer of the three-layer spunbond nonwoven laminate. These monocomponent filaments are preferably and in this embodiment substantially composed of a bonding component or a first polymer, and the first polymer is suitably and in this embodiment a homopolymerized polypropylene (Atofina MR2001) polymerized by metallocene catalysis. The monocomponent filaments are non-crimped.

[0067] Preferably and in this embodiment, the upper second crimped spunbond nonwoven layer applies the same data as the lower first crimped spunbond nonwoven layer described above. In the resulting three-layer laminate, the melting temperature difference between the bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer and the first polymer component of the continuous filaments of the crimped spunbond nonwoven layer, preferably and in this embodiment, the low-melting point, is less than 3° C., wherein preferably, the bonding component of the continuous filaments of the reinforcement spunbond nonwoven layer has a higher melting temperature than the first polymer component of the continuous filaments of the crimped spunbond nonwoven layer. In addition, the resulting spunbond nonwoven laminate preferably and in this embodiment has a cantilever of 41 mm in the MD direction. Preferably and in this embodiment, for the spunbond nonwoven laminate, a tensile force of 6.4 N / 5 cm is generated in the machine direction (MD) at an elongation of 5%, and a tensile force of 10.0 N / 5 cm is generated at an elongation of 10%. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] The invention is explained in detail below with the aid of the accompanying drawings which show only one embodiment.

[0069] Figure 1 A side view of a spunbonded nonwoven laminate according to the invention and of a device for producing a spunbonded nonwoven laminate according to the invention is shown,

[0070] Figure 2 Shown through the Figure 1 A vertical cross-section of a portion of a device,

[0071] Figure 3 shows a top view of a spunbond nonwoven laminate according to the present invention,

[0072] Figure 4 Shown along Figure 3 Cross-sectional view of AA. DETAILED DESCRIPTION

[0073] Use in Figure 1 , or by means of the method according to the invention, preferably and in this embodiment, a spunbond nonwoven laminate 1 having at least three spunbond nonwoven layers 2, 3, 4 can be produced from continuous filaments. Preferably and in this embodiment, the spunbond nonwoven laminate 1 consists of only three spunbond nonwoven layers 2, 3, 4, and the spunbond nonwoven laminate here preferably and in this embodiment refers to the lower first crimped spunbond nonwoven layer 2, the reinforcing spunbond nonwoven layer 3 configured as an intermediate layer, and the upper second crimped spunbond nonwoven layer 4. The continuous filaments are suitably and in this embodiment made of thermoplastic.

[0074] Preferably and according to Figure 1 In the embodiment of the present invention, the spunbond nonwoven laminate 1 has a first crimped spunbond nonwoven layer 2 at the bottom and a second crimped spunbond nonwoven layer 4 at the top, which are respectively composed of crimped continuous filaments or are essentially composed of them. The crimped continuous filaments of the crimped spunbond nonwoven layers 2, 4 can preferably and in this embodiment have an eccentric sheath-core configuration. Preferably, the core is composed of homopolypropylene or is essentially composed of it, and the sheath is essentially suitably and in this embodiment composed of a polypropylene copolymer or is essentially composed of it.

[0075] The spunbond nonwoven laminate 1 further preferably and in this embodiment has a reinforcement spunbond nonwoven layer 3 arranged between two curled spunbond nonwoven layers 2, 4. The reinforcement spunbond nonwoven layer 3 is preferably composed of non-curled continuous filaments, and the non-curled continuous filaments of the reinforcement spunbond nonwoven layer 3 are suitably and in this embodiment have a central or symmetrical skin-core configuration, wherein the skin of the continuous filaments of the reinforcement spunbond nonwoven layer 3 is formed by a bonding component, which is composed of or substantially composed of a first polymer, and the polymer is suitably and in this embodiment a polypropylene copolymer and very particularly preferably the same polypropylene copolymer as the skin component of the continuous filaments forming the curled spunbond nonwoven layers 2, 4. The core component of the continuous filaments of the reinforcement spunbond nonwoven layer 3 is preferably and in this embodiment composed of or substantially composed of homopolymerized polypropylene polymerized by metallocene catalysis.

[0076] To produce the spunbond nonwoven laminate 1, preferably and in this embodiment, firstly the continuous filaments of the lower first crimped spunbond nonwoven layer 2 are produced and laid on the Figure 1 , optionally compacted or pre-consolidated. Next, the non-curled continuous filaments of the reinforcement spunbond nonwoven layer 3 are preferably produced and preferably and in this embodiment are laid on the first curly spunbond nonwoven layer 2 at the bottom, optionally compacted or pre-consolidated. Subsequently, the curly continuous filaments of the upper second curly spunbond nonwoven layer 4 are preferably produced and preferably and in this embodiment are laid above the reinforcement spunbond nonwoven layer 3, optionally compacted or pre-consolidated. The various devices for compaction or pre-consolidation are in Figure 1 Not shown in detail.

[0077] The aggregate consisting of the two crimped spunbond nonwoven layers 2, 4 and the reinforcing spunbond nonwoven layer 3 is then finally consolidated by means of a calender having at least one calender roller 8, preferably and in this embodiment by means of a calender roller pair. Within the scope of the invention, an embossed pattern 5 consisting of a plurality of embossing portions 6, which is preferably provided, is introduced into the laminate 1 by means of the calender roller 8. This will be explained in further detail below. The second calender roller is preferably designed to be smooth or to have a smooth surface.

[0078] In addition, Figure 1 Schematically shown in FIG. 1 are three devices 9 for producing spunbonded nonwoven layers, which are therefore approximately a three-beam system with three spinning beams. Figure 2 The basic structure of a device 9 is shown, which is used to produce a spunbond nonwoven layer, for example a curled spunbond nonwoven layer 2 according to a spunbond method, and comprises a spinneret or spinning beam 10 for ejecting continuous filaments of a spunbond nonwoven layer. The continuous filaments ejected by the spinneret or spinning beam 10 are introduced into a cooling device 11 having a cooling chamber 12. Preferably and in this embodiment, air supply cabins 13, 14 are arranged one above the other on two opposite sides of the cooling chamber 12. Air of different temperatures is preferably introduced into the cooling chamber 12 from the air supply cabins 13, 14 stacked one above the other.

[0079] Recommendedly and in this embodiment, a stretching device 15 for stretching continuous filaments is connected downstream of the cooling device 11 along the filament flow direction. Suitably and in this embodiment, the stretching device 15 has an intermediate channel 16, which connects the cooling device 11 with a stretching shaft 17 of the stretching device 15. Preferably and in this embodiment, the unit consisting of the cooling device 11, the intermediate channel 16 and the stretching shaft 17 is constructed as a closed unit, and except for supplying cooling air to the cooling device 11, no other air supply from the outside is performed to the unit.

[0080] Suitably and in this embodiment, a diffuser 18 is connected after the stretching device 15 in the direction of the filament flow, through which the continuous filament is guided. After passing through the diffuser 18, the continuous filament is preferably and in this embodiment laid on a laying device which is constructed as a laying screen belt 19. The laying screen belt 19 is preferably and in this embodiment implemented as a continuously surrounding laying screen belt 19. Within the scope of the present invention, the laying screen belt 19 is air-permeable, so that process air can be sucked in from below through the laying screen belt. Figure 2 Also shown in FIG. 2 is the conveying direction F of the spunbond nonwoven layer 2 or the laminate and the laying wire belt 19 and thus the machine direction (MD).

[0081] Figure 3 and Figure 4 A laminate 1 according to the invention having spunbond nonwoven layers 2, 3 and 4 is shown. The laminate 1 preferably and in this embodiment has an embossed pattern 5 formed by a plurality of embossed portions 6 that are not connected to one another. The embossed portions 6 here refer in particular to compacted locations of the laminate 1 at which the laminate 1 has a smaller thickness than in non-embossed areas and at which the continuous filaments of the laminate 1 are preferably at least partially connected or fused to one another by the action of pressure and / or temperature. Preferably and in this embodiment, the embossed pattern 5 is a regular embossed pattern 5, the individual embossed portions 6 of which are preferably and in this embodiment distributed at regular intervals on the laminate 1 or on the nonwoven.

[0082] Expediently and in this exemplary embodiment, the embossings 6 each have a width of 0.05 mm. 2 Up to 0.3 mm 2 The embossing surface 7 of the embossing part 6 is within the scope of the present invention and in this embodiment refers in particular to the embossed surface of the embossing part 6, wherein when determining the size of the embossing surface 7, material protrusions or material flanges that may be formed during the pressing or embossing process and at least partially surround the embossing part 6 are not part of the embossing surface 7 of the embossing part 6. This is particularly the case when Figure 4 In the embodiment, the embossing surfaces 7 of the embossing portions 6 of the embossing pattern 5 are of the same size or substantially the same size. Preferably, the embossing surfaces 7 of the embossing portions 6 have a dot-shaped or circular geometry in a top view.

[0083] Within the scope of the present invention, the minimum spacing d between two embossed portions 6 of the embossed pattern 5 is respectively 0.6 to 2.5 mm. The minimum spacing d between two embossed portions 6 refers in particular to the minimum spacing d between two directly adjacent embossed portions 6 of the embossed pattern 5, that is, preferably the minimum distance d from one embossed portion 6 of the embossed pattern 5 to the embossed portion 6 closest to it. Furthermore, the minimum spacing d between two embossed portions 6 refers in particular to the minimum spacing d between the embossed boundaries of the two embossed portions 6, that is, the minimum spacing ( Figure 3 ).

[0084] Suitably, the thickness h of the spunbonded nonwoven laminate 1 is 0.15 to 0.75 mm. In the embodiment according to the figures, the thickness h of the laminate 1 can be about 0.3 mm. The thickness h here refers to the maximum thickness or total thickness of the spunbonded nonwoven laminate 1 transversely, in particular perpendicularly or substantially perpendicularly to the planar extension direction of the laminate in the non-embossed area of ​​the laminate 1. This can be particularly Figure 4 In the context of the present invention, the thickness h refers in particular to the finished, optionally pre-consolidated and / or finally consolidated laminate 1 .

Claims

1. A spunbond nonwoven laminate (1) comprising at least two spunbond nonwoven layers (2, 3) made of continuous filaments, wherein at least one crimped spunbond nonwoven layer (2) is present, which comprises, in particular consists of or essentially consists of crimped continuous filaments, wherein the crimped continuous filaments of the at least one crimped spunbond nonwoven layer (2) are multicomponent filaments, in particular bicomponent filaments, which have at least one first polymer component, preferably with a lower melting point, and at least one second polymer component, preferably with a higher melting point, There is at least one reinforcing spunbond nonwoven layer (3) which consists of or essentially consists of non-crimped continuous filaments and / or of continuous filaments which are less crimped than the continuous filaments of the at least one crimped spunbond nonwoven layer (2), wherein The continuous filaments of the reinforcing spunbond nonwoven layer (3) have at least one bonding component arranged on the surface thereof, The difference in melting temperature between the bonding component of the continuous filaments of the reinforcing spunbond nonwoven layer (3) and the preferably low-melting first polymer component of the continuous filaments of the at least one crimped spunbond nonwoven layer (2) is less than 15°C, preferably less than 12°C, preferably less than 8°C, particularly preferably less than 5°C, very preferably less than 3°C, very particularly preferably less than 2°C, for example 0°C or about 0°C, And wherein the laminate (1) has a cantilever maximum bending stiffness of a maximum of 100 mm, preferably a maximum of 90 mm, preferably a maximum of 80 mm, particularly preferably a maximum of 75 mm and very particularly preferably a maximum of 70 mm. 2 . The spunbond nonwoven laminate according to claim 1 , wherein the laminate ( 1 ) has a cantilever maximum bending stiffness of a maximum of 65 mm, preferably a maximum of 55 mm, particularly preferably a maximum of 50 mm, very particularly preferably a maximum of 45 mm.

3. The spunbond nonwoven laminate according to claim 1 or 2, wherein the continuous filaments of the at least one reinforcing spunbond nonwoven layer (3) are monocomponent filaments consisting of or essentially consisting of a bonding component.

4. A spunbond nonwoven laminate according to claim 1 or 2, wherein the continuous filaments of the at least one reinforcing spunbond nonwoven layer (3) are multicomponent filaments, in particular bicomponent filaments, preferably multicomponent filaments or bicomponent filaments having a sheath-core configuration, particularly preferably multicomponent filaments or bicomponent filaments having a central or symmetrical sheath-core configuration and / or having an eccentric sheath-core configuration, and wherein very particularly preferably, at least one bonding component of the continuous filaments of the reinforcing spunbond nonwoven layer (3) forms the sheath component of the continuous filaments having a sheath-core configuration.

5. The spunbond nonwoven laminate according to claim 4, wherein the core to sheath mass ratio of the continuous filaments of the reinforcing spunbond nonwoven layer (3) having a sheath-core configuration is 50:50 to 95:5, preferably 55:45 to 85:15, preferably 60:40 to 80:

20.

6. A spunbond nonwoven laminate according to any one of claims 1 to 5, wherein the melting temperature of the bonding component of the continuous filaments of the reinforcing spunbond nonwoven layer (3) is lower than the melting temperature of the preferably higher melting point second polymer component of the continuous filaments of the at least one curled spunbond nonwoven layer (2), and wherein the melting temperature difference between the preferably higher melting point second polymer component of the continuous filaments of the at least one curled spunbond nonwoven layer (2) and the bonding component of the continuous filaments of the at least one reinforcing spunbond nonwoven layer (3) is preferably at least 2°C, preferably at least 5°C, and particularly preferably at least 7°C.

7. The spunbond nonwoven laminate according to any one of claims 1 to 6, wherein the continuous filaments of the at least one reinforcing spunbond nonwoven layer (3) are more highly oriented in the machine direction (MD) than the continuous filaments of the at least one crimped spunbond nonwoven layer (2).

8. A spunbond nonwoven laminate according to any one of claims 1 to 7, wherein the continuous filaments of the at least one reinforcing spunbond nonwoven layer (3) have a fineness of less than 2.5 deniers, in particular less than 1.7 deniers, preferably less than 1.5 deniers, preferably 1.0 denier to 1.4 deniers, particularly preferably 1.2 denier to 1.4 deniers, and / or wherein the continuous filaments of the at least one curled spunbond nonwoven layer (2) have a fineness of less than 3.0 deniers, preferably less than 2.0 deniers, preferably less than 1.7 deniers, particularly preferably 1.0 denier to 1.6 deniers, very particularly preferably 1.2 denier to 1.4 deniers.

9. A spunbond nonwoven laminate according to any one of claims 1 to 8, wherein at least one bonding component of the continuous filaments of the reinforcing spunbond nonwoven layer (3) comprises, in particular consists of or essentially consists of a first polymer, wherein the first polymer is preferably a homopolymer polyolefin, in particular a homopolymer polypropylene and / or a homopolymer polyethylene, and / or a polyolefin copolymer, in particular a polypropylene copolymer and / or a polyethylene copolymer.

10. A spunbond nonwoven laminate according to any one of claims 1 to 9, wherein the at least one bonding component of the reinforcing spunbond nonwoven layer (3) consists of or essentially consists of a mixture or blend of at least one first polymer and at least one second polymer, and wherein preferably the first polymer and / or the second polymer is a homopolymer polyolefin, in particular a homopolymer polypropylene and / or a homopolymer polyethylene, and / or a polyolefin copolymer, in particular a polypropylene copolymer and / or a polyethylene copolymer.

11. A spunbond nonwoven laminate according to any one of claims 1 to 10, wherein the first polymer component with a preferably low melting point and / or the second polymer component with a preferably higher melting point of the continuous filaments of the at least one curled spunbond nonwoven layer (2) are at least one homopolyolefin, in particular at least one homopolypropylene and / or at least one homopolyethylene, and / or at least one polyolefin copolymer, in particular at least one polypropylene copolymer and / or at least one polyethylene copolymer.

12. A spunbond nonwoven laminate according to any one of claims 1 to 11, wherein the bonding component of the continuous filaments of the reinforcing spunbond nonwoven layer (3) and / or the preferably low-melting first polymer component of the continuous filaments of the at least one curled spunbond nonwoven layer (2) and / or the preferably higher-melting second polymer component of the continuous filaments of the at least one curled spunbond nonwoven layer (2) are respectively constructed based on a polyolefin selected from the same polyolefin material group, in particular based on polypropylene.

13. A spunbond nonwoven laminate according to any one of claims 1 to 12, wherein the continuous filaments of the at least one curled spunbond nonwoven layer (2) are multicomponent filaments, in particular bicomponent filaments, having a side-by-side configuration and / or having a sheath-core configuration, preferably having an eccentric sheath-core configuration, and wherein, preferably in the case of a sheath-core configuration or an eccentric sheath-core configuration, the preferably low-melting point first polymer component of the continuous filaments of the at least one curled spunbond nonwoven layer (2) forms the sheath component.

14. The spunbond nonwoven laminate according to any one of claims 1 to 13, wherein the mass ratio of the preferably low-melting first polymer component of the continuous filaments of the at least one curled spunbond nonwoven layer (2) to the preferably higher-melting second polymer component of the at least one curled spunbond nonwoven layer (2) is 10:90 to 60:40, preferably 25:75 to 50:50, preferably 30:70 to 40:

60.

15. A spunbond nonwoven laminate according to any one of claims 1 to 14, wherein there is at least one second curled spunbond nonwoven layer (4), and wherein the at least one reinforcing spunbond nonwoven layer (3) is preferably arranged between the at least two curled spunbond nonwoven layers (2, 4), in particular between the two curled spunbond nonwoven layers (2, 4).

16. The spunbond nonwoven laminate according to any one of claims 1 to 15, wherein: The ratio of the tensile strength of the laminate (1) in the machine direction (MD) to the tensile strength of the laminate (1) in the direction transverse to the machine direction (CD) is 1.0 to 2.5, preferably 1.1 to 2.3, preferably 1.2 to 2.0, particularly preferably 1.3 to 1.

9.

17. The spunbonded nonwoven laminate according to any one of claims 1 to 16, wherein for the laminate (1), a tensile force of greater than 3.0 N / 5 cm, preferably greater than 4.0 N / 5 cm, preferably greater than 4.5 N / 5 cm is generated in the machine direction (MD) at an elongation of 5%, and / or a tensile force of greater than 5.0 N / 5 cm, preferably greater than 6.0 N / 5 cm, particularly preferably greater than 7.0 N / 5 cm is generated at an elongation of 10%.

18. The spunbonded nonwoven laminate according to any one of claims 1 to 17, wherein the laminate (1) has an embossed pattern (5), wherein the embossed pattern (5) consists of a plurality of embossed portions (6) which are preferably not connected to one another, wherein the embossed portions (6) each have a diameter of 0.05 to 0.3 mm. 2 , preferably 0.06 to 0.2 mm 2 , preferably 0.07 to 0.18 mm 2 , particularly preferably 0.08 to 0.15 mm 2 and very particularly preferably from 0.09 to 0.12 mm 2 The stamping surface (7) of the embodiment of the present invention is as follows.

19. The spunbonded nonwoven laminate according to any one of claims 1 to 18, wherein the total embossed area of ​​the embossed pattern (5) accounts for 2 to 12%, preferably 2.5 to 8%, preferably 3 to 6%, particularly preferably 3.5 to 5.5% and very particularly preferably 4 to 5% of the total surface area of ​​the laminate (1).

20. The spunbond nonwoven laminate according to any one of claims 1 to 19, wherein the minimum distance d between two embossing parts (6) of the embossing pattern (5) is 0.6 to 2.5 mm, preferably 0.8 to 2.0 mm, preferably 0.9 to 1.8 mm, particularly preferably 0.95 to 1.6 mm and very particularly preferably 1.0 to 1.5 mm.

21. The spunbond nonwoven laminate according to any one of claims 1 to 20, wherein the laminate (1) has an abrasion resistance of at least 2 according to the Martindale scale, preferably 1 according to the Martindale scale.

22. A method for producing a spunbond nonwoven laminate, in particular a method for producing a spunbond nonwoven laminate according to any one of claims 1 to 21, wherein the spunbond nonwoven laminate has at least two spunbond nonwoven layers (2, 3) made of continuous filaments, wherein crimped continuous filaments are produced and laid to form at least one crimped spunbond nonwoven layer (2), wherein the crimped continuous filaments of the crimped spunbond nonwoven layer (2) are multicomponent filaments, in particular bicomponent filaments, which have at least one first polymer component, preferably with a low melting point, and at least one second polymer component, preferably with a higher melting point, wherein non-crimped continuous filaments and / or continuous filaments which are less crimped than the continuous filaments of the at least one crimped spunbond nonwoven layer (2) are produced and laid to form at least one reinforcing spunbond nonwoven layer (3), in particular laid above the at least one crimped spunbond nonwoven layer (2), wherein the continuous filaments of the reinforcing spunbond nonwoven layer (3) have at least one bonding component arranged on their surface, The difference in melting temperature between the continuous filaments of the reinforcing spunbond nonwoven layer (3) and the first polymer component of the continuous filaments of the crimped spunbond nonwoven layer (2), which preferably has a low melting point, is less than 15°C, preferably less than 12°C, preferably less than 8°C, particularly preferably less than 5°C, very preferably less than 3°C, very particularly preferably less than 2°C, for example 0°C or about 0°C, And wherein the laminate (1) has a cantilever maximum bending stiffness of a maximum of 100 mm, preferably a maximum of 90 mm, preferably a maximum of 80 mm, particularly preferably a maximum of 75 mm and very particularly preferably a maximum of 70 mm.

23. A method according to claim 22, wherein curled continuous filaments are produced and laid to form at least one second curled spunbond nonwoven layer (4), in particular laid on top of at least one reinforcing spunbond nonwoven layer (3), so that it is very particularly preferred to obtain an at least three-layer, in particular three-layer laminate (1), wherein the at least one reinforcing spunbond nonwoven layer (3) forms an intermediate layer.

24. The method according to claim 22, wherein the laminate (1) is consolidated or final consolidated by means of at least one calender roller (8), and wherein an embossing pattern consisting of a plurality of embossings (6) is introduced into the laminate (1) by means of the at least one calender roller (8), wherein the embossings (6) each have a diameter of 0.05 to 0.3 mm. 2 , preferably 0.06 to 0.2 mm 2 , preferably 0.07 to 0.18 mm 2 , particularly preferably 0.08 to 0.15 mm 2 and very particularly preferably from 0.09 to 0.12 mm 2 The stamping surface (7) of the embodiment of the present invention is as follows.

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