Method and machine for producing a fibrous material web - Patents.com

Abstract

The present invention relates to a method for producing a fibrous web (1), in particular a tissue web or nonwoven web, formed by a dry processing method, in which the fibrous web (1) is pressed horizontally and consolidated in a press nip (9) between a first support element (2) and a second support element (3), each having a contact surface (2.1, 3.1) facing the fibrous web (1). The contact surface (2.1) of at least the first support element (2) is configured in such a way that at least one low-pressure zone (4) and at least one high-pressure zone (5) are formed in the fibrous web (1), and in the at least one high-pressure zone (5), a pressing pressure of more than 10 MPa, in particular more than 15 MPa, preferably more than 25 MPa is applied to the fibrous web (1).

Description

[Technical field]

[0001] The present invention relates to a method for producing a fibrous material web, in particular a tissue web or a nonwoven web, formed by a dry processing method.

[0002] The invention also relates to a machine for carrying out the method as well as to a fibrous material web having improved strength.

[0003] Strength additives are often used in the manufacture of fibrous webs, particularly tissue or nonwoven webs, by wet processing processes.

[0004] The wet processing method is the most frequently used method for producing fibrous webs, especially tissue and nonwoven webs. The solids of such fibrous webs are suspended in water at the beginning of the production process and fed through the headbox of the forming section of the papermaking machine, where they are mechanically dewatered in the downstream press section and then thermally dried in the dryer. The presence of water leads to the formation of so-called hydrogen bonds, which give rise to the basic strength of the fibrous web. To further increase this basic strength, strength enhancers are added to the fibrous web.

[0005] In an effort to optimize the manufacturing process for fibrous webs with respect to energy consumption and CO2 emission reduction, dry processing methods are increasingly used. By eliminating the need for water in preparing the fibers for the production of the fibrous web, a significant amount of energy and CO2 emission can be saved by omitting the thermal drying step compared to wet-processed paper. However, in this method, the strength of the fibrous web can no longer be fully achieved by the formation of hydrogen bonds, since no water or only a small amount of water is used and therefore the fibers are almost dry-processed to form the web. Here, in the production of tissue webs and nonwovens, latex polymers are sprayed on the paper surface or synthetic molten fibers are mixed into the fibers before dry processing. The fibrous web containing the molten fibers is then heated. The molten fibers melt and are bonded to the cellulose fibers of the fibrous web. This increases or creates strength in the fibrous web. These strength-enhancing agents are also expensive and account for a large part of the production cost of such papers. Additionally, the latex polymer and molten fibers have poor or even non-biodegradable properties.

[0006] The object of the present invention is therefore to provide a method and a machine for obtaining inexpensive and environmentally friendly strength buildup in the production of fibrous webs, such as tissue webs and nonwoven webs, while reducing or even completely avoiding the disadvantages of known methods.

[0007] This problem is solved by the features of claim 1. A method is proposed for producing a fibrous material web, in particular a tissue web or a nonwoven web, formed by a dry processing method, in which during a pressing step the fibrous material web is pressed and consolidated horizontally in a press nip between a first support element and a second support element each having a contact surface facing the fibrous material web, the contact surface of at least the first support element being configured in such a way that at least one low pressure zone and at least one high pressure zone are formed in the fibrous material web, and in the at least one high pressure zone a pressing pressure of more than 10 MPa, in particular more than 15 MPa, in particular more than 25 MPa is applied to the fibrous material web.

[0008] In the press nip, a three-dimensional structure is imprinted into the fibrous web by the contact surface of the first support element. The present invention increases the strength, e.g., tensile strength, of the fibrous web without compromising the desired properties, e.g., thickness, water absorption capacity, flexibility, specific volume.

[0009] The fibrous web is locally pressed strongly in at least one high pressure zone, whereby the fibrous web is densified and is thus differentiated from at least one low pressure zone. The sum of the areas of all low pressure zones and at least one high pressure zone in the test area of ​​the fibrous web corresponds to the total area and thus to the test area. The area proportion of the at least one high pressure zone can therefore be easily determined.

[0010] Further advantageous results may be obtained if several press nips or several pressing steps, preferably two press nips, in particular three press nips, are arranged one after the other. This advantageously allows a further improvement of the parameters to be achieved with slightly higher investment costs. In this case, further components can be arranged between the individual press nips or upstream or downstream of each press nip, for example a supply device for a wet strength agent or other strength agent which is added to further increase the strength. Furthermore, the alternative embodiments of the press nips described in the description of the figures can be combined with one another in various ways, for example the configuration shown in FIG. 2 or FIG. 3 is possible for the first press nip and the configuration shown in FIG. 5 is possible for the second or third press nip.

[0011] New developments in the production process for fibrous webs are moving towards dry processing methods in terms of reducing energy consumption and CO2 emissions. In this method, the fibers are individualized in an almost dry state, usually air-dried, and fed to a dry processing device to form the fibrous web. The required strength of the fibrous webs produced in this way can no longer be achieved sufficiently by the formation of hydrogen bonds, because no water or only little water is used, and therefore the fibers for forming the web are processed in an almost dry state. Here, the present invention has particularly positive results, and also in the production of tissue webs and nonwoven webs. For this type of paper, on the one hand, sufficient strength must be achieved in the dry processing method, and on the other hand, the requirements for use, such as specific volume, water absorption, water retention, softness, also called hand, must be met. Therefore, in accordance with the present invention, a pressing pressure of more than 10 MPa, in particular more than 15 MPa, is applied to the fibrous web in a high-pressure zone in order to achieve the requirements for use of the fibrous web in addition to the strength.

[0012] For these reasons, the invention can also be applied with particular advantage in the case of sanitary papers, which may include tissue webs and nonwoven webs, which may include products based on the following non-exhaustive exemplary group enumeration: wiping cloths, hand cloths, napkins, table cloths, etc.

[0013] The invention can also prove advantageous precisely during the production of nonwoven fabrics, since these may at least partially comprise plastic fibers which do not form hydrogen bonds.

[0014] Therefore, the tissue paper web or nonwoven web to be produced is 10 g / m 2 ~50g / m 2 , preferably 12 g / m 2 ~45g / m 2 Advantageously, the sheet may be formed having a basis weight of 0.1 to 100 g / g.

[0015] Therefore, at least one high pressure zone must be 9 mm 2 Smaller than 4mm 2 Smaller than 0.5mm, preferably 2 It is also advantageous to form the fibrous structure with a larger area than 100 mm, which, on the one hand, provides sufficient strength and, on the other hand, satisfies the requirements for use, such as specific volume, water absorption, water retention capacity, softness, also called "hand feel".

[0016] In an advantageous configuration, at least one high pressure zone is less than 0.5 mm 2 ~2mm 2 The surface area of ​​the insulating layer 14 can be within the range of 10 mm to 15 mm.

[0017] Advantageously, at least one high pressure zone has an area proportion of the pressed surface of 5% to 60%, in particular 5% to 20%, in particular 5% to 30%, preferably 30% to 60%, preferably suitably 35% to 50%.

[0018] In one possible configuration, a number of high pressure zones may be formed, in which case the sum of their areas has an area percentage of the pressed surface of 5% to 60%, in particular 5% to 30%, preferably 30% to 60%, preferably 35% to 50%.

[0019] In practical cases, multiple high pressure zones may be formed, and the spacing between adjacent high pressure zones may be smaller than the average fiber length of the fibers in the fibrous material web.

[0020] Furthermore, it is also possible to connect at least one high pressure zone to each adjacent high pressure zone by a further high pressure zone. These further high pressure zones can extend linearly. Starting from one high pressure zone, the further high pressure zones extend radially. This results in a high strength of the fibrous material web and at the same time a good specific volume.

[0021] In the possible case where several high pressure zones are formed, in each high pressure zone the fibrous material web is subjected to a pressing pressure of more than 10 MPa, in particular more than 15 MPa, preferably more than 25 MPa.

[0022] The pressing pressure in the high pressure zone may be up to 70 MPa, preferably up to 50 MPa, especially for high strength or if the tissue or nonwoven web contains certain fiber types.

[0023] In the at least one low pressure zone, the fibrous web may be subjected to a pressing pressure of less than 10 MPa, in particular less than 8 MPa, preferably more than 0 MPa or in the range of more than 0 MPa to 3 MPa. Preferably, the at least one low pressure zone is pressed only slightly, so that the pressing pressure is somewhat above 0 MPa, in particular more than 0.1 MPa, preferably more than 1 MPa. Advantageously, the surface fibrous web is pre-compressed or pre-pressed in the low pressure zone as well, to a value of less than 50%, preferably less than 80%, of the initial specific volume of the fibrous web, in particular based on a dry processing method. Or, in other words, the compression or pre-pressing is carried out so that the thickness of the treated fibrous web immediately after at least one pressing step is at most 50%, preferably at most 80%, of the thickness of the fibrous web treated with a dry processing method before this pressing step. This improves the stability of the treated fibrous web. This is particularly useful during the continuous production of fibrous webs. This makes the fibrous web insensitive to the generated air currents.

[0024] The fibrous web to be dry processed is usually 12 cm 3 / g, especially 20cm 3 / g, preferably 25 cm 3 The advantage of the fibrous web is that it is processed with a specific volume of more than 1 / g. This has a favorable effect on the uniform distribution of individual fibers and / or fiber bundles in the volume of the fibrous web, and on the other hand, on the action and uniformity of the distribution of the water supplied. This allows a fibrous web with uniform strength distribution to be obtained using a minimum amount of water. Or, in other words, the thickness of the fibrous web is more than 2 mm, in particular more than 5 mm, preferably more than 10 mm before the pressing step.

[0025] In an advantageous configuration, the dry treatment method is carried out prior to at least one pressing step such that the fibrous material web has a bone dryness of more than 50%, in particular more than 70%, preferably more than 80%, particularly preferably more than 90% before the at least one pressing step. Usually, the dry treatment fibrous material web has a very high bone dryness, since no or only little water is added for stock preparation. In an alternative embodiment, if a wet strength agent or another strength agent, for example water, is added before the pressing step, the bone dryness can be influenced, for example, by heating the fibrous material web during the pressing step.

[0026] The first and / or second support element may be formed as a roll with a contact surface with or without projections for forming at least one high pressure zone. The roll may alternatively be formed as a roll with a preferably metallic or coated surface, as a shoe roll or as a roll with a plastic roll cover. In the case of a roll with a preferably metallic or coated surface, the roll surface directly forms the contact surface. The roll with a preferably metallic or coated surface is harder compared to a roll with a plastic roll cover. In a shoe roll, the press sleeve forms the contact surface. In the case of a roll with a plastic roll cover, the roll cover forms the contact surface.

[0027] The contact surface may be formed with protrusions.

[0028] For example, it is possible to combine a first support element configured as a roll with a surface that forms an immediate contact surface with a second support element configured as a roll with a roll cover made of plastic with a soft surface, in which case a so-called "soft nip" press nip is formed.

[0029] For example, the contact surface of the first support element, preferably the metallic or coated surface of a roll, may be formed with protrusions.

[0030] As another alternative, the roll cover may be made of plastic and provided with protrusions, in which case the roll cover with the protrusions forms the contact surface of the support element.

[0031] In rolls whose roll surface directly forms the contact surface, the surface may be formed with projections by machining methods, for example electro-discharge machining or milling.

[0032] In another alternative embodiment, the second support element is formed as a roll, preferably with a metallic or coated surface and a smooth surface, i.e. without protrusions.

[0033] In another possible combination, the first support element is formed as a roll, preferably with a metallic or coated surface and with protrusions, and the second support element is formed as a roll, preferably with a metallic or coated surface and with a smooth surface. Such a combination of a press roll, the contact surface of which is directly formed by the surface of the roll as the first support element, and a counter roll, the contact surface of which is directly formed by the surface of the roll as the second support element, is a "hard nip" press nip.

[0034] In an alternative embodiment, the first support element and / or the second support element are formed as a roll, preferably the first support element and / or the second support element are formed with protrusions in order to structure the fibrous material web.

[0035] The first support element and / or the second support element may be formed as a circulating belt with protrusions to form a plurality of high pressure zones.

[0036] The circulating belt may be configured as a diaphragm or a woven belt, for example a screen, with projections applied to the contact surface, which may comprise a plastic or may be printed.

[0037] The circulating belt can also be designed as a woven belt, in which case the projections can be formed from weaving threads.

[0038] The first support element and / or the second support element may be made to be permeable or non-permeable.

[0039] In the loop formed by the first support element formed as a belt and / or the second support element formed as a belt, respectively, a roll for forming a press nip may be arranged. The press nip may be formed by a press roll and a counter roll. The press roll may be formed as a shoe press roll with an extended press nip. The press nip may be formed by a calender roll.

[0040] In one possible configuration, the at least one high pressure zone may be formed by a protrusion on the contact surface of at least the first support element, the cross-sectional shape of which may be circular, triangular, rectangular or elongated, whereby the shape of the high pressure zone may be correspondingly circular, triangular, rectangular or elongated, the shapes of the high pressure zones may be different.

[0041] Preferably, the protrusions may be formed with a height of 0.05 mm to 1 mm, in particular 0.05 mm to 0.5 mm, which allows the pressing in the at least one high pressure zone and the pressing in the at least one low pressure zone to be adjusted relative to one another.

[0042] In one possible refinement, the at least first support element may be formed as a diaphragm with perforations, the at least one high pressure zone may be formed by the contact surface of the diaphragm, and the low pressure zone may be formed by the area of ​​the perforations of the at least first support element, i.e. this embodiment differs in that each opening forms a respective low pressure zone and only one high pressure zone is formed between these low pressure zones.

[0043] To improve the strength build-up, at least one high pressure zone may be heated via the support elements to a temperature of 50° C. to 250° C., particularly preferably 110° C. to 160° C., preferably the surface temperature of the roll.

[0044] In one possible refinement, the contact surface of at least the first support element may be configured in such a way that a plurality of high pressure zones are formed, the arrangement of the high pressure zones in a pattern contributing to an aesthetic effect.

[0045] In another possible configuration, the contact surface of at least the first support element may be configured such that a plurality of high pressure zones are formed, the arrangement of the high pressure zones being selected such that the tensile strength in the plane of the fibrous material web is direction-dependent. For example, the tensile strength can be increased in a certain direction by providing more high pressure zones per unit length in this direction than in another direction, i.e., there is a higher density of high pressure zones in a certain direction.

[0046] By tailoring the high pressure zone density and / or high pressure zone shape, it is also possible to directional shape the paper properties, such as strength properties.

[0047] In one possible configuration, at least a second support element located opposite the first support element may be formed flexibly in order to structure the side of the fibrous material web that contacts the second support element, whereby the back side of the fibrous material web is likewise structured, thereby assisting and enhancing the fulfillment of the requirements for use, such as the specific volume, water absorption, water retention, softness, also called hand.

[0048] In many cases, it may be advantageous to add a wet strength agent or other strength agent to the fibrous web before and / or after the pressing step to provide additional strength.

[0049] Furthermore, it is possible for the fibrous material web to be crinkled after the pressing step.

[0050] In the case of a dry-treated fibrous web, it may also be advantageous to pre-press the fibrous web slightly into a flat shape before it enters the press nip, in order to make the treated, still loose, fiber mat resistant to air flows.

[0051] The problem is also solved by a machine for implementing a method for producing a fibrous material web, in particular a tissue web or a nonwoven web, according to claim 1. The machine comprises a dry processing section and a press nip, in which the fibrous material web is pressed and consolidated horizontally between a first support element and a second support element each having a contact surface facing the fibrous material web, the contact surface of at least the first support element being configured in such a way that at least one low pressure zone and at least one high pressure zone are formed in the fibrous material web, in which at least one high pressure zone is applied to the fibrous material web with a pressing pressure of more than 10 MPa, in particular more than 15 MPa, preferably more than 25 MPa.

[0052] The present invention also relates to a fibrous web formed in a dry processing method by the method according to claim 1, comprising at least one low pressure zone and at least one high pressure zone, in which the fibrous web is subjected to a pressing pressure of more than 10 MPa, in particular more than 15 MPa, preferably more than 25 MPa.

[0053] The present invention explicitly extends to embodiments not provided by the combination of features explicitly recited in the claims. Thus, the disclosed features of the invention may be combined with one another in any combination that is technically meaningful.

[0054] Further features and advantages of the present invention will become apparent from the following description of the preferred embodiments taken in conjunction with the drawings. [Brief description of the drawings]

[0055] [Figure 1] 1 shows a simplified schematic diagram of a possible embodiment of a fibrous material web according to the present invention. [Diagram 2] 1 is a simplified, not to scale, view of a possible embodiment of a press nip of the press section of a machine according to the invention, in which both support elements are formed as belts or as rolls with roll covers. [Diagram 3] FIG. 2 is a simplified, not to scale, view of a possible embodiment of a press nip of the press section of a machine according to the invention, in which one support element is smoothly formed as a roll having a surface which forms the direct contact surface. [Figure 4] FIG. 2 is a simplified, not to scale, diagram of a possible embodiment of a press nip of the press section of a machine according to the invention, in which one support element is formed with protrusions as a roll having a surface that forms the direct contact surface. [Diagram 5] FIG. 2 is a simplified, not to scale, view of a possible embodiment of a press nip of the press section of a machine according to the invention, in which both support elements are formed as rolls with surfaces which form the immediate contact surface.

[0056] In FIG. 1, a possible embodiment of the fibrous material web according to the invention is shown in a schematic plan view, simplified as a cutout. In this example, the fibrous material web 1 has a number of high-pressure zones 5. These high-pressure zones 5 are pressed strongly during the manufacturing process in order to produce a higher strength. The local pressing pressure in the high-pressure zones 5 is more than 10 MPa. The areas between the high-pressure zones 5 are pressed only slightly, forming a single low-pressure zone 4. The pressing in this low-pressure zone 4 is in the range from more than 0 MPa to 1 MPa. The high-pressure zones 5 are formed trapezoidally. However, the high-pressure zones 5 may have any shape, for example circular, triangular, rectangular, etc. The high-pressure zones 5 in the pressed surface 7 are arranged uniformly distributed. However, the high-pressure zones 5 may also be arranged in a pattern in order to improve the appearance of the fibrous material web 1. This is advantageous in the case of tissue webs and nonwoven webs. The distance 6 between adjacent high-pressure zones 5 is preferably smaller than the average fiber length of the fibrous material web 1. The dimensions of each individual high pressure zone 5 are 9 mm 2 and has an area ratio of 5% to 50% on the pressed surface. The dimensions of the individual high pressure zones 5 may be the same or different from each other.

[0057] In FIG. 2, a possible embodiment of a press nip 9 of the press section of the machine according to the invention is shown in a simplified, not to scale view. The fibrous material web 1 is guided horizontally through the press nip 9 in the running direction 12 between a first support element 2 and a second support element 3. The first support element 2 and the second support element 3 are formed by a rotating belt. The press nip 9 comprises a press roll 10 arranged in the loop of the first support element and a counter roll 11 arranged in the loop of the second support element. On its contact surface facing the fibrous material web 1, the first support element 2 has protrusions 8 for forming a high-pressure zone 5. When the fibrous material web 1 runs through the press nip 9, the protrusions 8 locally press the fibrous material web 1 strongly and thus compact it. Downstream of the press nip 9, the protrusions are again detached from the fibrous material web 1. This results in a structured three-dimensional surface structure with a high-pressure zone 5 and, in this example, a single low-pressure zone 4.

[0058] In FIG. 3, an alternative possible embodiment of a press nip 9 of the press section of the machine according to the invention is shown in a simplified, not to scale view. The fibrous material web 1 is guided horizontally through the press nip 9 between a first support element 2 and a second support element 3 in the running direction 12. The press nip 9 contains a press roll 10 and a counter roll 11. The press roll 10 may be arranged in a loop of the first support element. The first support element 2 is formed by a circulating belt or a roll cover of the press roll 10. The counter roll 11 forms a second contact surface 3.1 with the second support element 3, preferably by a metallic or coated smooth surface. On its contact surface facing the fibrous material web 1, the first support element 2 has protrusions 8 for forming a high-pressure zone 5. When the fibrous material web 1 runs through the press nip 9, it is locally pressed strongly by the protrusions 8 and thus consolidated. Downstream of the press nip 9, the projections 8 are again separated from the fibrous material web 1. This results in the formation of a structured three-dimensional surface structure with high pressure zones 5 and, in this example, a single low pressure zone 4.

[0059] In FIG. 4, an alternative possible embodiment of a press nip 9 of the press section of the machine according to the invention is shown in a simplified, not to scale view. The fibrous material web 1 is guided horizontally through the press nip 9 between a first support element 2 and a second support element 3 in a running direction 12. The press nip 9 contains a press roll 10 and a counter roll 11, which may be arranged in a loop of the second support element. The second support element 3 is formed by a circulating belt or a roll cover of the counter roll 11. The press roll 10 preferably forms a first contact surface 2.1 with the first support element 2 by a metallic or coated surface with protrusions. On the contact surface 2.1 facing the fibrous material web 1, the first support element 2 or the press roll 10 has protrusions 8 for forming a high-pressure zone 5. When the fibrous material web 1 runs through the press nip 9, it is locally pressed strongly by the protrusions 8 and thus consolidated. Downstream of the press nip 9, the projections 8 are again separated from the fibrous material web 1. This results in the formation of a structured three-dimensional surface structure with high pressure zones 5 and, in this example, a single low pressure zone 4.

[0060] In FIG. 5 an alternative possible embodiment of a press nip 9 of the press section of the machine according to the invention is shown in a simplified, not to scale view. The fibrous material web 1 is guided horizontally through the press nip 9 between a first support element 2 and a second support element 3 in a running direction 12. The press nip 9 comprises a press roll 10 and a counter roll 11. The counter roll 11 forms a first contact surface 3.1 with the second support element 3, preferably by means of a metallic or coated smooth surface. The press roll 10 forms a first contact surface 2.1 with the first support element 2, preferably by means of a metallic or coated surface with projections. The first support element 2 or the press roll 10 has projections 8 on the contact surface 2.1 facing the fibrous material web 1 for forming a high-pressure zone 5. When the fibrous material web 1 runs through the press nip 9, it is locally pressed strongly by the projections 8 and thus consolidated. Downstream of the press nip 9, the projections 8 are again separated from the fibrous material web 1. This results in a structured three-dimensional surface structure with high pressure zones 5 and, in this example, a single low pressure zone 4.

[0061] Corresponding elements in the embodiments in the figures are labeled with the same reference numerals. The functions of such elements in the individual figures correspond to each other and do not cause any contradiction, unless otherwise stated, and therefore repeated description will be omitted. [Explanation of symbols]

[0062] 1 Fibrous material web, tissue paper web, nonwoven web 2 First Support Element 2.1 Contact surfaces 3 Second Support Element 3.1 Contact surfaces 4. Low Pressure Zone 5. High Pressure Zone 6 Spacing between high pressure zones 7 Pressed Surface 8 protrusions 9 Press nip 10 Press Roll 11 Supported Roles 12 Travel direction

Claims

1. A method for manufacturing a fibrous web (1) formed by a dry process, in particular a tissue web or a non-woven web, wherein the fibrous web (1) is horizontally pressed and consolidated between a first support element (2) and a second support element (3) each having one contact surface (2.1, 3.1) facing the fibrous web (1) in a press nip (9) during a pressing process, and at least the contact surface (2.1) of the first support element (2) is configured such that at least one low-pressure zone (4) and at least one high-pressure zone (5) are formed in the fibrous web (1), and in the at least one high-pressure zone (5), a pressing pressure of more than 10 MPa, in particular more than 15 MPa, preferably more than 25 MPa is applied to the fibrous web (1).

2. The at least one high-pressure zone (5) is smaller than 9 mm ２ and in particular smaller than 4 mm ２ and preferably larger than 0.5 mm ２ Method according to claim 1, characterized in that it is formed with an area larger than that.

3. The method according to claim 1 or 2, characterized in that a plurality of high-pressure zones (5) are formed, and an interval smaller than the average fiber length of the fibers of the fibrous web (1) is formed between adjacent high-pressure zones (5).

4. The method according to claim 1 or 2, characterized in that the at least one high-pressure zone (5) is connected by one another high-pressure zone (5) to one of the adjacent high-pressure zones (5).

5. The method according to claim 1 or 2, characterized in that the at least one high-pressure zone (5) has an area ratio of 5% to 60%, in particular 5% to 30%, preferably 30% to 60% on the pressed surface (7).

6. The method according to claim 1 or 2, characterized in that in the at least one low-pressure zone (4), a pressing pressure of less than 10 MPa, in particular less than 8 MPa, preferably more than 0 MPa or a pressing pressure in the range of more than 0 MPa to 3 MPa is applied to the fibrous web (1).

7. The method according to claim 1 or 2, characterized in that the plurality of high-pressure zones (5) are formed by protrusions (8) provided on at least the contact surface (2.1) of the first support element (2).

8. The method according to claim 7, characterized in that the protrusion (8) is formed to have a height of 0.05 mm to 1 mm, in particular 0.05 mm to 0.5 mm.

9. At least said first support element (2) is formed as a diaphragm having perforation holes, said at least one high-pressure zone (5) is formed by said contact surface (2.1) of said diaphragm, and said low-pressure zone (4) is formed by the area of the perforation holes of at least said first support element (2). The method according to claim 1 or 2, characterized in that.

10. At least said contact surface (2.1) of said first support element (2) is configured such that a plurality of high-pressure zones (5) are formed, and arranging said high-pressure zones (5) in a pattern contributes to obtaining an aesthetic effect. The method according to claim 1 or 2, characterized in that.

11. The second support element (3) located opposite at least said first support element (2) is formed to be flexible in order to structure the surface of the fibrous material web (1) that contacts the second support element (3). The method according to claim 1 or 2, characterized in that.

12. Said first support element (2) and / or said second support element (3) are formed as rolls (10, 11), and preferably, said first support element (2) and / or said second support element (3) are formed with protrusions (8) for structuring the fibrous material web (1). The method according to claim 1 or 2, characterized in that.

13. A wet strength enhancer or another strength enhancer is added to the fibrous material web (1) before said pressing step. The method according to claim 1 or 2, characterized in that.

14. A machine for implementing a method for manufacturing a fibrous material web (1), in particular a tissue web or a non-woven web, as claimed in claim 1, comprising a dry processing section and a press nip (9), in which press nip (9) the fibrous material web (1) is pressed horizontally and consolidated between a first support element (2) and a second support element (3), each having one contact surface (2.1, 3.1) facing the fibrous material web (1), and at least the contact surface (2.1) of the first support element (2) is configured such that at least one low-pressure zone (4) and at least one high-pressure zone (5) are formed in the fibrous material web (1), and in the at least one high-pressure zone (5), a press pressure of more than 10 MPa, in particular more than 15 MPa, preferably more than 25 MPa is applied to the fibrous material web (1).

15. A fibrous material web, such as a tissue web or a non-woven web, formed by a dry processing method according to the method claimed in claim 1, comprising at least one low-pressure zone (4) and at least one high-pressure zone (5), and in the at least one high-pressure zone (5), a press pressure of more than 10 MPa, in particular more than 15 MPa, preferably more than 25 MPa is applied to the fibrous material web (1).

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