RU2466234C2 - Multilayer textile creping fabric - Google Patents

Abstract

FIELD: textiles and paper.

SUBSTANCE: multilayer textile creping fabric containing warp and weft threads. Multilayer textile creping fabric has a machine side or the side that is in contact with the shaft, and a side that is in contact with the paper web. Weft threads on the machine side of the fabric are provided with grooves and/or have a diameter that is smaller than the diameter of the warp threads.

EFFECT: invention enables to provide more rapid and effective drying of the paper web.

11 cl, 11 dwg

Description

FIELD OF THE INVENTION

The present invention relates to endless fabrics, in particular, to multilayer textile creping fabrics used in the manufacture of paper products. More specifically, the present invention relates to creping fabrics used in the manufacture of paper products such as toilet paper, sanitary napkins, paper towels.

BACKGROUND

Currently, the consumption of soft absorbent disposable paper products, such as cosmetic wipes and paper towels, has become widespread in industrialized countries. There are many known methods of manufacturing such products, but they all begin with the formation of the pulp web in the forming part of the paper machine. The formation of the cellulose web is carried out by applying a fibrous suspension, i.e. diluted with water pulp on a moving forming mesh in the forming part of the paper machine. Most of the water drains from the pulp through the forming mesh, while a paper web is formed on the surface of the mesh.

Further processing and dewatering of the paper web usually occurs in one of two well-known ways - by pressing a moistened web and through drying. When pressing the moistened web, the newly formed paper web is fed onto the press fabric and transported from the forming part to the press part, which contains at least one roller press, between the shafts of which the paper web is passed onto the press fabric to support the web, or, as often happens, the web is passed between two such fabrics. Between the shafts of the press, the paper web is pressed, so that it is dehydrated. Moisture is absorbed by the press fabric or fabrics and, ideally, does not fall back onto the paper web or paper.

After pressing the paper web using, for example, a press cloth, it is fed to a rotating heated American drying drum, on the surface of which the paper web is finally dried. The presence of moisture inside the paper web, while the web adheres to the surface of the dryer drum, causes the web to adhere to the surface of the drum, and therefore, in the manufacture of toilet paper and paper towels, the web is usually separated from the surface of the drum by a creping scraper. Then the creped fabric is finished in a calender and wound into a roll before further processing. It is known that the action of a creping scraper on a paper web by mechanically dragging the scraper towards the web when it is fed to the scraper leads to the destruction of part of the internal interfiber bonds of the paper. However, in the drying process of the paper web, sufficiently strong interfiber bonds between the cellulose fibers are formed. The strength of these bonds is such that even after ordinary creping, the fabric retains tangible hardness, a fairly high density, small thickness and low absorbency.

To reduce the strength of the interfiber bonds formed by pressing the moistened mass, through drying can be used. In the through-drying process, the newly formed paper web is fed to the drying cloth for through-drying with a stream of air created by vacuum or suction (TAD technology), which bends (bends) the web and forces it to at least partially accept the surface relief of the drying cloth ( TAD). The paper web transported by the drying cloth passes through air-through drying, where a stream of heated air directed to the cloth and through the drying cloth (TAD) dries the paper cloth to the desired state. Finally, after vacuum drying, the web is fed onto the surface of an American dryer drum for final drying. Then, the completely dried web is removed from the American drying drum by a creping scraper, which shortens or crepes the web, thus further increasing its density. Then the shortened fabric is wound into rolls for subsequent processing, including packaging in a condition suitable for transportation and delivery to consumers.

When using through drying technology (TAD technology) with insufficient pressing of the fabric, which can occur during the pressing of the moistened fabric, which is passed onto the fabric between the shafts and when fed to the American dryer, the possibility of forming strong interfiber bonds is reduced, which leads to that the finished toilet paper and paper towels have a higher density than in their manufacture by the traditional method of pressing the moistened mass. However, since the tensile strengths of the webs formed by through drying generally do not correspond to the consumer qualities of the final product, various chemical additives are usually added to the fabric before forming or during the formation process to obtain the desired strength while maintaining a greater bulk mass of the original product.

As noted above, there are many ways to make paper towels, so the previous description should be understood as a sequence of universal operations that are used in various methods. For example, it is not always necessary to use an American tumble dryer, since in some situations, shortening the paper web is undesirable or other methods may be used for this, for example, the wet creping method.

It should also take into account other changes in the technology and configuration of machines when pressing a moistened mass, or for through drying. For example, in some cases, a creping scraper is not used to remove the paper web from the surface of the dryer drum. In addition, there are processing methods, alternative to the through drying method, by which they try to obtain paper napkins with qualities similar to those obtained using TAD technology, but without special installations and high energy costs characteristic of this technology.

Consumer qualities such as paper weight, absorbency, strength, softness and aesthetics are essential for many products, especially for paper products such as cosmetic wipes, toilet paper or paper towels. For the manufacture of paper products with such characteristics, the fabric is usually made so that on the surface in contact with the paper web, changes in the surface topography are displayed. These changes are often measured as the difference in height in the plane between the yarn threads on the fabric surface. For example, the height difference is usually measured as the difference in height of the weave relief between the warp thread and the weft thread, or as the difference in height of the folds of the threads extending in the machine direction (MD) and across the movement of the fabric in the machine (CD) in the plane of the surface of the fabric. Often in the structure of the fabric there are pockets, and in this case, the depth of the pocket is taken as the difference in height. It should be noted that these creping fabrics can be infinite or closed in a ring in a paper machine and work like conveyors. In addition, it should be borne in mind that paper production is a continuous process that takes place at significant speeds. More specifically, the fibrous slurry is continuously applied to the forming mesh in the forming part, while at the same time, a new finished paper web is continuously wound into rolls after drying.

The present invention provides a fabric, the use of which reduces or completely eliminates the re-wetting of the paper product formed on it during production.

SUMMARY OF THE INVENTION

Thus, the main objective of the invention is the creation of a multilayer textile crepe fabric, with which re-wetting of the formed paper web is minimized or even eliminated.

- Another objective of the invention is to create a multilayer textile creping fabric, having on the machine side or the side in contact with the shaft, weft threads provided with recesses.

- Another objective of the invention is the creation of a creping fabric having deeper pockets compared to traditional single-layer fabrics.

- Another objective of the invention is the creation of a creping fabric, which provides the formation of a paper web having a greater thickness and lower density.

- Another objective of the invention is the creation of a multilayer textile creping fabric, which ensures not only the production of improved quality paper, but also a process in which the creping percentage and paper density can vary over a wider range, as a result of which the range of performance and / or the volume of reused fiber is increased.

- Another objective of the invention is the creation of a multilayer textile creping fabric with 8 sheds, the machine side of which or the side in contact with the shaft has weft threads provided with recesses, and the side in contact with the paper web has hollows or round weft threads.

- Another objective of the invention is the creation of a multilayer textile creping fabric, the diameter of the weft of which is less than the diameter of the warp.

Using the present invention allows to achieve these and other goals and advantages. Thus, on the one hand, the present invention aims at creating a multilayer textile creping fabric, on the surface of which, in contact with the shaft, the weft threads are provided with recesses. On the other hand, the aim of the invention is to provide a multilayer textile creping fabric, the diameter of the weft of which is less than the diameter of the warp. Along with this, a combination of the location of these threads is provided. The advantage of the fabric structure - according to the present invention - compared with known analogues is that the presence on the surface of the fabric from the side in contact with the shaft, weft threads provided with recesses, and / or the presence of weft threads, the diameter of which is less than the diameter of the warp threads, allows reduce or even eliminate the possibility of re-wetting the paper web with water remaining in the fabric.

Further, the multilayer textile creping fabrics according to the present invention have deeper pockets than traditional single-layer materials. The presence of deeper pockets is ensured by the multilayer structure of the fabric and the difference in height in the plane between the warp thread and the weft thread. Deeper pockets make it possible to obtain a greater thickness and lower density of the paper web using vacuum drying compared to a paper web made using known fabric. Fabrics - according to the present invention - can be used in paper machines for embossing, creping and other operations that may be known to a person skilled in the art. For a better understanding of the invention, its functional advantages and the goals achievable due to its application, preferred embodiments of the invention are described below with reference to the accompanying drawings, in which the same elements are denoted by the same numbers.

BRIEF DESCRIPTION OF THE DRAWINGS

The following is a detailed description in the form of an example, which does not limit the scope of the invention and in which, for better understanding, reference is made to the drawings, in which the same elements have the same numerical designations:

- figure 1 shows a cross section of a weft thread provided with recesses, in accordance with one embodiment of the present invention;

- figure 2 shows a structural diagram of a paper machine used for paper production;

- figa shows a photograph of the surface of the fabric in contact with a paper web made in accordance with one embodiment of the present invention;

- figv shows a photograph of the surface of the fabric in contact with the shaft, made in accordance with one variant of the present invention;

- figure 4 shows the weaving pattern of a multilayer textile creping fabric with 8 throat in accordance with one embodiment of the present invention;

- figure 5 schematically shows a sample of weaving fabric according to the image in figure 4;

- figure 6 shows the contours of the warp for the weaving pattern according to the image in figure 4;

- figure 7 shows the contours of the weft thread for the weaving pattern according to the image in figure 4;

- Fig.8 schematically shows a weaving pattern in accordance with one embodiment of the present invention;

- figure 9 shows a three-dimensional image of the surface of the fabric according to the image in figure 4;

- figure 10 shows a three-dimensional image of the surface of a traditional embossed fabric.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following is a more complete description of the present invention with reference to the drawings, in which preferred embodiments of the invention are shown. However, the present invention can be implemented in various forms, and the following explanatory embodiments of the invention should not be construed as limiting its scope. On the contrary, these embodiments of the invention contribute to a more complete and detailed disclosure of the invention. In addition, from these examples, the scope of the invention is obvious to a person skilled in the art.

The present invention relates to multilayer textile creping fabrics used in the manufacture of soft, absorbent, disposable paper products, for example, cosmetic wipes, toilet paper and paper towels. These fabrics minimize or even eliminate re-wetting of the paper product or paper web.

The present invention contributes to the creation of a multilayer textile creping fabric intended for use in the machine depicted in figure 2, the use of which can reduce production costs and time for the production of paper products. Shortened production times and lower costs are achieved through the use of fabrics according to the present invention, which reduce or even prevent re-wetting of the paper web with water removed from the paper web. Thus, provide faster and more efficient drying of the paper web.

However, fabrics made according to the present invention have better performance on a paper machine due to the reduction or even complete absence of holes in the paper web, which in turn contributes to the machine at higher levels of broaching, or with a lower density of paper without holes in paper cloth. However, recycled material with a higher fiber content can be used while maintaining the desired properties of the paper web.

In addition, fabrics made according to the present invention have deeper pockets, which makes it possible to obtain a paper web with improved absorption.

As used herein, the terms “weft yarns provided with recesses” are used to describe weft yarns used in embodiments of the present invention. Figure 1 shows a non-limiting example of a weft thread 2 having recesses 4.

Furthermore, weft yarns provided with recesses — according to the present invention — may be called furrowed, shaped, or non-circular. Also, the present invention is described using smooth tissues as an example. Therefore, here weft threads are threads located across the movement of fabric in the machine (CD), and warp threads are threads located in the machine direction (MD). It should also be noted that the terms “weft thread” and “weft thread” are used interchangeably and refer to threads located across the movement of fabric in a machine (CD). In addition, smooth textile fabrics can be joined into a ring by creating seams or weaving. The advantage of multilayer textile fabrics is that they can be joined with a machine seam seam, which is almost uniform, unlike single-layer fabrics.

Preferred embodiments of the invention are described below in terms of full-width, full-size fabrics used as creping fabric in a conveyor or dryer section of a paper machine.

When developing options for creping fabrics used in the paper industry for the manufacture of absorbent paper products, such as those discussed above, unique and unexpected results were obtained. A similar method is disclosed in PCT Patent Publication No. WO 2004/033793 and US Patent Application No. 2005/0241786, the reference to which means that their contents are fully incorporated into the present description. Figure 2 illustrates an example of a paper-making process and presents the paper machine 10 used. The paper machine 10 includes a traditional double-mesh forming part 12, a conveyor belt 14, a press part 16 with a shoe press, a creping fabric 18, and an American tumble dryer 20. The forming part 12 contains two forming nets 22, 24 supported by rollers 26, 28, 30, 32, 34, 36 and forming cylinder 38. From headbox 40, paper pulp is fed to a roller press 42 formed between the forming cylinder core 38, roller 26 and nets. From the pulp, a paper web 44 is formed, which is dehydrated on the nets using a vacuum created, for example, by a suction box 46.

The paper web 44 is fed to the press fabric 48 of the paper machine, supported by the shafts 50, 52, 54, 55, and in contact with the shoe press shaft 56. When fed to the press fabric 48, the web 44 has a low density. The feed can be performed using vacuum, for example, as a shaft 50, if necessary, a suction cylinder, a gripping device or a vacuum guide, which are known in the art, can be used. When the paper web enters the shaft 56, its density can reach 10-25%, preferably 20-25%, or about this value, when it enters the pressing zone 58 between the shaft 56 and the transfer shaft 60. If necessary, the shaft 60 can be hot cylinder selected. Instead of a shoe press shaft, a conventional suction cylinder may be used as the shaft 56. When using a shoe press shaft, it is preferable and desirable that a suction cylinder is selected as the shaft 54, which provides more efficient removal of water from the press fabric before feeding the fabric to the press zone, since water from the paper web will be squeezed onto the press fabric in the press zone. In any case, the use of the suction cylinder 54 is usually preferable to ensure that the paper web is retained on the press fabric when the direction changes, which should be clear to the person skilled in the drawings.

In zone 58, moisture from the web 44 is squeezed onto the press fabric 48 by the lower support press 62. Thus, at this stage of the process, the paper web is dehydrated in zone 58, usually by increasing the web density by 15 percent or more dry matter. The shoe press is generally referred to as the structure shown in zone 58. In the present invention, cylinder 60 operates as a transfer cylinder, which at high speed (typically 1000 to 8000 ft / min) feeds web 44 onto fabric 18.

The cylinder 60 has a smooth surface 64, which, if necessary, is coated with an adhesive or release agent. The blade 44 adheres to the transfer surface 64 of the cylinder 60, which rotates at a high angular velocity, while the blade 44 continues to move in the machine direction indicated by arrows 66. The blade 44 on the cylinder 60 usually has a seemingly random fiber distribution.

Direction 66 is called the machine direction (MD) of the movement of the paper web, as well as the paper machine 10, while the transverse (CD) is the direction perpendicular to the movement of the paper web (MD).

As shown in the drawings, the web 44 enters zone 58, typically with a density of from 10 to 25 percent or about this value, and is dehydrated and dried to a density of 25 to 70 percent before being applied to the fabric 18.

As shown in the drawings, fabric 18 is supported by rollers 68, 70, 72 and press drum 74, and together with cylinder 60 forms a creping zone 76. The creping zone 76 of the fabric 18 is determined by the distance over which the fabric 18 is in contact with the cylinder 60, that is, the fabric 44 is strongly pressed against the cylinder 60. For this purpose, a support or creping roller 70 with a soft and deformable surface can be used, with which increase the length of the creping zone and the creping angle between the fabric and the paper web and the contact zone. As the roller 70, a shoe press shaft can also be used, which allows to increase the effective contact of the paper web with a tight-fitting fabric in the zone 76, in which the web 44 is fed to the fabric 18 and moved in the machine direction. Using various equipment in zone 76, the creping angle of the fabric or the angle of exit from the creping zone can be adjusted. Thus, by adjusting these clamping parameters in the contact zone, it is possible to influence the nature and magnitude of the redistribution of the fiber, as well as the delamination / loosening that can occur in zone 76. After creping the fabric, the web 44 continues to move in the machine direction 66, and in the transfer zone 82 it is pressed against an American dryer drum 80. The density of the paper web in zone 82 is 25 to 70 percent. This density does not provide strong adhesion of the web 44 to the surface 84 of the drying drum 80, in which it can be completely removed from the fabric. This is an important point in the process, especially if it is necessary to use a high-speed drying chamber, as well as in the case of the need for strong pressing during creping. In this regard, it is important to note that in the traditional through drying (TAD) high-speed drying chambers are not used, since in this case they do not achieve sufficient adhesion to the dryer drum 80. In this process, it is advisable to use adhesives that contribute to such adhesion of a moderately moistened paper web with a density from 25 to 70 percent to the drum 80, which is sufficient to ensure the operation of the system at high speed and high-speed jet air drying.

The web 44 is dried on a dryer drum 80, which is a heated cylinder, and by high-speed jet drying in the dryer drum chamber 88. As the drum 80 rotates, the web 44 is creped from the drum by a creping scraper 89 and wound onto a take-up roller 90.

In one embodiment, in the above process, as the fabric 18 shown in FIGS. 3-5, a multilayer textile creping fabric with 8 yarns and weft threads provided with recesses is used on the side in contact with the machine or not in contact with the paper web.

Generally speaking, a creping fabric has two sides: a side in contact with the paper web, and a machine side or a side in contact with the shaft. The name of the first side of the material is due to the fact that it faces the newly formed paper web. The name of the second side of the material is due to the fact that it passes through the shafts of the paper machine and in contact with them. In the paper manufacturing process, the creping fabric is mounted on a paper machine as shown in FIG. 3A. The side in contact with the paper web contains depressed or round weft threads 100, and the side in contact with machine elements, as shown in FIG. 3B, contains weft threads 110 provided with recesses. As previously discussed, in the paper manufacturing process after the transmission shaft 60, the web 44 is fed to the fabric 18, moving at a much lower speed. After feeding the paper web, a suction box (not shown) pulls the paper web deeper onto the fabric 18 and further removes residual water from the paper web by squeezing it onto and through the inside of the fabric 18. It could be assumed that the water remaining in the fabric 18 after extraction re-moistens the fabric 44. However, this does not happen in this case, since the fabric 18 is installed in a paper machine so that weft threads are provided on the side in contact with the shaft recesses. Moisture tests indicate that rewetting is minimal or completely eliminated. It was found that the tissue itself during movement is moistened from the inside, which should also not indicate the absence of re-hydration. Along with this, drops falling inside the fabric do not create holes in the paper web, which usually occurs in single-layer fabrics. Therefore, the lack of rewetting of the web 44 is an unexpected result. Thus, this unexpected result may be due to the installation in a paper machine of a textile multilayer creping fabric 18, on the side of which, in contact with the shaft, the weft threads are provided with recesses.

Apparently, a multilayer fabric having weft threads on the machine side and provided with recesses is the reason that re-wetting the paper web with water that remains in the fabric is minimally or completely absent. The reasons may be the following:

- One of the reasons may be the presence of weft threads equipped with recesses whose surface area is greater than the surface area of round weft threads. Due to the larger area of such a surface, greater surface tension may occur between the fabric and the residual water, which reduces the likelihood that the residual water will come out of the fabric and re-wet the paper web;

- another reason may be due to the fact that due to the use of weft threads equipped with recesses, the relationship of the threads at the intersection points may change. For example, if both strands are round, the distance between the strands at the intersection points becomes smaller and smaller (of the order of several microns), and this small distance can create capillary forces that hold water inside the fabric. Thus, the use of weft threads equipped with recesses on the machine side changes the configuration of the threads at the points of their intersection, which can reduce capillary forces;

- another possibility may consist in the fact that the configuration of the threads at the points of their intersection due to the presence of weft threads provided with recesses, makes it possible to retain water or contributes to the formation of pockets that prevent the holding and / or accumulation of water by threads.

Therefore, it can be considered that the present invention is not limited to the specific embodiment of a multilayer textile creping fabric with 8 throats disclosed above. Any multilayer textile creping fabric having on the side in contact with machine elements, weft threads provided with recesses can also minimize or completely prevent re-wetting of the paper product formed on the fabric.

The fabric, in one aspect of the present invention, can be made using 8-yaw multilayer textile fabric, the weaving pattern of which is shown in FIGS. 4-7.

Figure 4 schematically shows a weaving pattern 200 of textile fabric from the side in contact with the paper web shown in figa and 3B (top view). 4, the machine direction is indicated by arrow 150, and the transverse direction is shown by arrow 160. Each column corresponds to the main thread 210, and each row corresponds to the weft thread 220, 230. Each cell indicates the intersection (the place at which the main threads and weft threads intersect together). The number in the cage indicates the place of weaving in which this numbered main thread 210 is located on the surface of the fabric in contact with the paper web. Accordingly, empty cells indicate places where the main thread 210 passes under the weft thread 220 and therefore will not come into contact with the formed paper web.

Figure 4 shows a weaving pattern that contains two types of weft threads, namely weft threads 220 from the side in contact with the paper web, and weft threads 230 from the side in contact with the shaft, as well as one kind of warp threads 210. Weft threads, provided with recesses used in forming the fabric according to the present invention, are located on the side of the fabric that is in contact with the shaft, which can reduce or even prevent the re-penetration of water remaining in the fabric into the paper web formed on the fabric no.

In figure 4, the number located under each main thread 210, characterizes the contour pattern, and this number is followed by the number of warp threads. Each warp yarn corresponds to a column in FIG. 4. For example, the main thread 1 corresponds to the weaving pattern shown in the first column in figure 4. As the outline drawing of thread 1 shows, the main thread passes over the weft threads 1, 2, 4, 6, 8, 12, 14, 15, 16 and under the weft threads 3, 5, 7, 9, 10, 11, 13. Thus , in the first column, the cells corresponding to the weft threads 1, 2 and 14-16 indicate that the main thread 1 forms the intersection points where it passes over the weft threads according to the weaving pattern. Conversely, the empty cells in Fig. 4 show the places where the warp thread passes under the weft thread.

Figure 5 shows a schematic representation of the fabric corresponding to the weaving pattern 200 shown in figure 4. As in FIG. 4, the numbers to the right of the contour pattern of each weft thread indicate the number of the weft thread, followed by the number of the contour pattern of the weft thread. Each weft thread corresponds to a line in FIG. 4. For example, the main thread 1 corresponds to the pattern, which is characterized by the first column in figure 4. As can be seen from the outline drawing of the weft thread 1, the weft thread passes under the main threads 1 and 4 above the main threads 2-3, 5-8. Thus, the cells in row 2 of FIG. 4, corresponding to the warp yarns 1, 4 and 6-8, indicate that these warp yarns form kinks where they pass over the weft yarn 1 in the weaving pattern. As indicated above, the empty cells of FIG. 4 show where the warp thread passes under the weft thread.

On Fig presents another embodiment of a multilayer textile creping fabric, used, for example, as fabric 18 in the above process, which is a multilayer textile creping fabric with 8 throat, in which the diameter of the weft threads 240 is less than the diameter of the main threads 250. 8, the weft direction is indicated by arrow 260, and the warp direction is indicated by arrow 270. According to this embodiment of the present invention, the diameter of the warp threads 250 is 0.5 mm and the diameter of the weft threads 240 is 0.4 mm. In addition, the creping fabric 18 may have warp threads 250 with a diameter of 0.64 mm and weft threads 240 with a diameter of 0.5 mm or threads 250 with a diameter of 0.35 mm and weft threads 240 with a diameter of 0.25 mm. Apparently, the presence of weft yarns 240, the diameter of which is smaller than the diameter of the yarns 250, makes it possible to obtain fabrics that provide improved performance on the paper machine due to the fact that the holes in the paper web are reduced or absent. It should be noted that weft yarns of smaller diameter may contain the aforementioned yarns provided with recesses, or may be used with them.

Figure 9 presents a three-dimensional top view of the surface and in depth of the proposed fabric made in the above manner. Image was obtained using a high-precision optical three-dimensional measuring device MarSurf TS 50, manufactured by Mahr GmbH Gottingen, Gottingen, Germany. As can be seen from FIG. 9, the dark patches 300 are pockets deeper than traditional embossing textile fabrics. Also in FIG. 9, it can be seen that the weft threads 310 are located directly below the plane of the upper surface of the fabric, and the main threads 320 are located near the plane of the upper surface of the fabric. Thus, due to the fact that the weft threads 310 and the main threads 320 are not located in the plane of the upper surface of the fabric, and also due to the multilayer structure of the fabric, the pockets in it are deeper than in traditional single-layer fabric.

Figure 10 presents a three-dimensional top view of the surface and in depth of a conventional embossing fabric. Image was obtained using a high-precision optical three-dimensional measuring device MarSurf TS 50, manufactured by Mahr GmbH Gottingen, Gottingen, Germany. As you can see, the fabric in figure 10 does not have dark areas, which are on the fabric depicted in figure 9, and, therefore, it does not have deeper pockets that are in the fabric depicted in figure 9. In addition, as can be seen from figure 10, the weft threads 330 and the main threads 340 are located in the plane of the upper surface of the fabric, resulting in pockets of this fabric are smaller compared to the pockets of the fabric according to the present invention.

Using the described fabric allows you to get a paper web of much greater thickness, but much lower density, which is an unexpected result. Larger thickness and lower density allow you to get a softer paper with increased absorbency, which is the desired quality of the product. And finally, the fabric according to the present invention provides such a process in which the percentage of creping fabric, paper density and / or volume of fiber suitable for reuse can vary over a wider range, as a result of which the range of process performance can be significantly expanded. Despite the detailed description of the preferred embodiment of the present invention and its modifications, the present invention is not limited to this embodiment and the changes thereto, so that other changes are possible made by specialists who do not go beyond the scope and scope of the invention limited by the attached claims.

Claims (12)

1. A multilayer textile creping fabric containing warp threads, weft threads, the machine side or the side in contact with the shaft, and the side in contact with the paper web, and as the weft threads on the machine side of the fabric or the side that is in contact with the shaft, the threads are used equipped with recesses. 2. The fabric according to claim 1, which is made in the form of multi-layer weaving with 8 pharynx. 3. The fabric according to claim 2, in which the multilayer weaving contains weft threads of at least two kinds. 4. The fabric according to claim 3, in which the weft of the first type is located on the machine side of the fabric or the side that is in contact with the shaft, and the weft of the second type is located on the side of the fabric in contact with the paper web. 5. The fabric according to claim 4, in which the diameter of the weft threads of the first type and / or second type is less than the diameter of the warp threads. 6. The fabric according to claim 1, in which the warp threads are located on the plane of the upper surface of the fabric, and the weft threads are located under the plane of the upper surface of the fabric. 7. The fabric according to claim 6, which has deeper pockets than a single layer fabric. 8. A multilayer textile creping fabric comprising warp yarns having a diameter and weft yarns having a diameter, the weft yarn having a diameter less than the warp yarns. 9. The fabric of claim 8, which is made in the form of a multilayer weave with 8 pharynx. 10. The fabric according to claim 9, in which the multilayer weaving contains weft threads of two types. 11. The fabric of claim 8, in which the warp threads are located on the plane of the upper surface of the fabric, and the weft threads are located under the plane of the upper surface of the fabric. 12. The fabric according to claim 11, in which the depth of the pockets is greater than the depth of the pockets of a single-layer fabric.

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