JP2001040594A - Multiple axes pressing cloth having angled weave - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a multiple axes pressing cloth having cloth having a thicknessholding capacity, enduring a long term water treatment, excellent in pressure distribution, easy in cleaning, causing an excellent sheet finish and having an improved cross section for crossing in right angle against a machine direction. SOLUTION: This multiple axes pressing cloth comprises a base cloth 36 and a staple fiber material attached to the base cloth 36 by sewing. The base cloth has at lest one layer assembled by winding a woven fabric belt in a spiral state. The base cloth 36 takes an endless loop form. The yarns for the woven fabric belt are oriented in directions different from the direction of the machine and the direction of crossing the machine in right angle for imparting the multiple axes characteristics to the base cloth 36. Each of fibers in the layer of the staple fiber material attached to the base cloth 36, is mainly oriented in an inclined angle against the direction of the machine for the pressing cloth and forms a cross shape-crossing woven fabric.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the art of paper machines. More particularly, the present invention relates to a press fabric in a press section of a paper machine.

[0002]

BACKGROUND OF THE INVENTION During the papermaking process, cellulosic fibrous webs are formed by precipitating a fibrous slurry, i.e., an aqueous dispersion of cellulosic fibers, on a forming fabric moving in a forming section of a paper machine. . A large amount of water leaves the cellulosic fibrous web on the surface of the forming fabric and exits the slurry through the forming fabric.

[0003] The newly formed cellulosic fibrous web proceeds from the forming section to a press section that includes a series of press nips. The cellulosic fibrous web is passed through a press nip supported by a press fabric, or often, between two such press fabrics. In the press nip, the cellulose fibrous web squeezes out water therefrom and also undergoes a compressive force that in turn folds the cellulose fibrous web into a paper sheet to adhere the cellulose fibers in the web. . The water is contained by the press cloth and ideally does not return to the paper sheet.

[0004] The paper sheet is finally advanced to a dryer section which includes at least a series of rotary dryer drums or cylinders, which are internally heated by steam. The newly formed paper sheet is guided into successively meandering paths around each of the rows of drums by a dryer fabric that holds the paper sheets in close contact with the surface of the drum. The heated drum reduces the water content of the paper sheet to the desired level by evaporation.

[0005] It should be understood that the forming, pressing and drying fabrics all perform the same function as endless loops and conveyors on paper machines. It should further be understood that paper production is a continuous process that proceeds at a significant rate. That is, while the fibrous slurry is continuously deposited on the forming fabric at the forming station, the newly produced paper sheet is continuously wound on rollers after it exits the dryer section.

The present invention particularly relates to a press fabric used in a press section. Press fabrics play a crucial role in the paper manufacturing process. As implied above, one of these functions is to support and transport the paper product being manufactured through the press nip.

[0007] Press fabrics are also involved in the surface finishing of paper sheets. That is, the press fabric is designed to have a smooth surface and a uniformly elastic structure so that a smooth, scratch-free surface is dispensed to the paper as it passes through the press nip.

[0008] Perhaps most importantly, the press fabric will receive a large amount of water extracted from the paper wet at the press nip. To fulfill this function, it is usually quoted as the void volume for water to get into the press cloth,
There must be space, and the fabric must have adequate water permeability for its entire useful life. Finally, the press fabric must prevent the water received from the wet paper from returning to the paper and re-wetting as it exits the press nip.

[0009] Modern press fabrics are produced in a variety of styles designed to meet the needs of paper machines installed according to the grade of paper being manufactured. Generally, they consist of a woven base fabric into which a cotton wool of fine nonwoven fibrous material has been sewn. The base fabric is woven from monofilament, twisted monofilament, multifilament or twisted multifilament yarns and may be monolayer, multilayer or laminated. The yarn is typically extruded from any one of the synthetic polymeric resins, such as polyamide and polyester resins, used for this purpose in the ordinary art of the paper machine textile industry.

The woven base fabric itself can take many different forms. For example, they are woven endlessly,
Or it may be provided in an endless form with a subsequently woven seam in a plain weave. Alternatively, they may be made by a process commonly known as a modified endless weave, where the lateral edges of the base fabric are oriented in its machine direction (MD)
Seaming loops using the same yarn. In this step, the MD yarns are continuously woven back and forth between the lateral edges of the fabric, folding back at each edge to form a seaming loop. The base fabric thus produced is placed in an endless form during installation on the paper machine and for this reason is referred to as a machine-seamable fabric. To put this cloth in endless form, the two side edges are brought together,
The seaming loops on the two edges are entangled with each other,
The seaming pin or shaft is then guided through the passageway formed by the entangled seaming loop.

[0011] Further, the woven base cloth is sewn with staple fiber batting through both base cloths by placing one base cloth inside the endless loop formed by the other and connecting them to each other. It may be laminated by inserting. One or both woven base fabrics may be of a type that can be seamed together on a machine.

In any event, the woven base fabric is in the form of an endless loop, or is seamable to such a shape, and can be measured lengthwise around it and to a particular length and across it It has a specific width measured sideways. Due to the wide variety of paper machine geometries, paper machine fabric manufacturers are required to make press fabrics and other paper machine fabrics that are sized to fit the specific location of their customer's paper machine. . Needless to say, this requirement makes it difficult to streamline the manufacturing process since each press fabric typically has to be made to order.

In response to this need for faster and more efficient production of press fabrics of various lengths and widths, press fabrics have been used in recent years by Rexfeld et al.
Manufactured using the helical technique disclosed in US Pat. No. 5,360,656, the teachings of which are incorporated herein by reference.

US Pat. 5,360,656 shows a press fabric consisting of a base fabric having one or more layers of staple fiber material sewn therein. The base fabric consists of at least one layer composed of a spirally wound band of woven fabric having a width smaller than the width of the base fabric. The base fabric is endless longitudinally, i.e. in the machine direction. The warp threads of the spirally wound strip are at an angle to the longitudinal direction of the press fabric. Woven fabric bands are plain woven on a narrower loom than typically used in the manufacture of paper machine fabrics.

The base fabric consists of a number of spirally wound and connected turns of a relatively narrow web band. Fabric bands are woven from warp and weft. Adjacent turns of the spirally wound fabric strip are adjacent to one another, and the spiral continuous seam thus created is closed by sewing, embroidering, melting or welding. Instead, the adjacent vertical edge portions of adjacent spiral turns have reduced thickness at the edges, and are arranged overlapping unless the overlapping portions cause increased thickness. May be. Furthermore, the spacing between the warp yarns is increased at the edge of the band, so that when adjacent spiral turns are arranged in an overlapping manner, the spacing between the warp yarns in the overlapping portion remains unchanged.

In any case, the result is a woven base fabric in the form of an endless loop and having an inner surface, a longitudinal (machine) direction and a transverse (orthogonal to machine) direction. The horizontal edge of the woven foundation cloth is then vertical (machine) to it
Truncated to give parallelism in direction. The angle between the machine direction of the woven base fabric and the helically continuous seam is relatively small, ie typically less than 10 °. Similarly, the warp yarns of the woven band make a relatively small angle, as well as the warp (mechanical) direction of the woven base fabric. Similarly, the weft yarns of the woven band at right angles to the warp make a relatively small angle, as well as the transverse (machine-right) direction of the woven base fabric. In short, the warp and weft of the woven band are not aligned with the warp (machine) or weft (perpendicular to the machine) direction of the woven base fabric.

US Pat. In the method shown at 5,360,656, the web band is wrapped around two parallel rollers for assembling the woven base fabric. A variety of endless foundation cloths of width and length are provided by helically winding relatively narrow strips of a woven band around two parallel rollers, the length of a particular endless foundation cloth being determined by the length of the woven band. It will be appreciated that the length of each spiral turn is determined and the width is determined by the number of spiral turns of the web. The significant necessity of weaving a complete base cloth of a specific length and width to order is thereby avoided. Instead, a loom as narrow as 20 inches (0.5 meters) could be used to produce the fabric, but for practical reasons, 40 to 60 inches (1.0 to 1.5 meters). Regular textile looms having a width of are preferred.

US Pat. 5,360,656 also shows a press fabric consisting of a base fabric having two layers, each composed of a spirally wound band of woven fabric. Both layers take the form of an endless loop, one that fits inside the endless loop formed by the other. Preferably, the spirally wound band of one layer of fabric is spiraled in the opposite direction to that of the other fabric band. In other words, more specifically, if the spirally wound band of one layer is defined as right-handed, that of the other layer is determined as left-handed. In such a two-layer, laminated base fabric, the warp yarns of each of the two layers of woven fabric bands make a relatively small angle with the warp (mechanical) direction of the woven base fabric, and The warp of the woven band makes an angle with the warp of the woven band of the other layer. Similarly,
The weft yarns of each of the two layers of fabric bands make a relatively small angle with the transverse (perpendicular to the machine) direction of the woven base fabric, and the weft yarns of one layer of fabric bands are formed of the other layer. At an angle with the weft of the woven band. In short, neither the warp nor the weft of the woven band of either layer is aligned with the warp (machine) or weft (perpendicular to the machine) direction of the base fabric. Furthermore, neither the warp nor the weft of either layer of the woven band is co-aligned with the others.

In conclusion, US Pat. 5,360,
The base fabric shown at 656 did not define a machine or yarn in a direction perpendicular to the machine. Instead, the yarn system is at an oblique angle with respect to the machine and a direction perpendicular to the machine.
Press fabrics having such a base fabric are referred to as multi-axial press fabrics. The prior art standard press cloth has three axes: one in the machine direction (MD) and one in the direction perpendicular to the machine (C
D), and the other, while having a Z-direction through the thickness of the fabric, a multi-axis press fabric not only has these three axes,
It also has at least two or more axes defined by the direction of the yarn system for each of the helically wound layers. Furthermore,
There are multiple channels in the Z direction of the multi-axis press cloth. In conclusion, the multi-axial press fabric has at least five axes. Due to its multi-axial construction, multi-axial press fabrics having one or more layers have a lower press nip during the papermaking process when their yarn systems are compared to those having parallel base fabric layers. It exhibits excellent resistance to nesting or crushing in response to compression.

[0020]

SUMMARY OF THE INVENTION The present invention has improved thickness retention, excellent long-term water treatment and pressure distribution, ease of cleaning, excellent sheet finish and improved machine orthogonal cross-section. Provide a multi-axis press cloth.

[0021]

SUMMARY OF THE INVENTION The present invention is an improved multiaxial press fabric having a base fabric of the type described above and a plurality of layers of staple fiber material sewn therein. The fibers making up the layer of staple fiber material lie in other directions than the longitudinal (machine) and transverse (perpendicular to the machine) directions of the multiaxial press fabric, and more specifically at oblique angles with respect to the longitudinal direction, It provides a press fabric whose components can all be considered multiaxial.

In its most general form, the present multi-axial press fabric for the press section of a paper machine comprises a base fabric having at least one layer formed by spirally winding a band of fabric. Consists of The fabric band may be woven from warp and weft. Alternatively, the fabric band may be a non-woven mesh fabric of the type disclosed in Johnson U.S. Pat. No. 4,427,734, the teachings of which are incorporated herein by reference. In each case, the fabric band has a first side edge and a second side edge, and the first side edge of one turn of the fabric band is adjacent to the second side edge of the adjacent turn. It is spirally wound in a number of adjacent turns. This forms a spiral continuous seam that distinguishes adjacent turns of the fabric strip. The helical continuous seam is closed by adjoining adjacent first and second side edges of the fabric strip. In this way, the base fabric is provided in the form of an endless loop having a machine direction, a direction perpendicular to the machine, an inner surface and an outer surface.

The base fabric may comprise one or more additional layers formed by spirally winding a band of fabric, which may be woven from warp and weft yarns, or alternatively may be of the type described above. Non-woven mesh cloth. The additional fabric strip also has a first side edge and a second side edge, and the first side edge of each additional fabric strip turn is adjacent to the second side edge of the adjacent turns in a number of adjacent manners. It is spirally wound in turns.
A spiral continuous seam distinguishing adjacent turns of the additional fabric band is thereby formed. The spiral continuous seam is closed by adhering adjacent first and second side edges of each additional fabric strip to each other. In this way, one or more additional layers are provided in the form of an endless loop having a machine direction, a direction perpendicular to the machine, an inner surface and an outer surface. Preferably, at least some of the additional fabric bands are spirally wound in a direction opposite to that of the original fabric band. The endless loop formed by the additional layer is disposed inside or outside the endless loop formed by the first layer.

[0024] Multiple layers of staple fiber material are attached to one or both of the inside and outside of the base fabric. At the same time, if the base fabric includes one or more layers, each layer is attached to one another by individual fibers of staple fiber material sewn therethrough. The fibers making up the layer of staple fiber material are primarily oriented at an oblique angle with respect to the machine direction of the base fabric and are considered to constitute an angled weave. In other words, the fibers of each of the plurality of layers of staple fiber material are oriented substantially parallel to one another primarily in a direction at an oblique angle to the machine direction. Further, the oblique angle is the same for each of the plurality of layers. Finally, the direction in each of the multiple layers crossed (crisscrossed angula
r) has the opposite orientation to that of any immediately below or directly above layers, so as to make a weave

[0025]

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described in more complete detail, often with reference to the drawings identified below.

Referring now to some of the drawings, FIG. 1 is a schematic top view illustrating a method of manufacturing one of the base fabric layers of the multiaxial press fabric of the present invention. The method is carried out using a device 10 consisting of a first roller 12 and a second roller 14 which are parallel to each other and can rotate in the direction indicated by the arrows. Woven strip 16 is storage roller 1
8 is wound in a continuous spiral around the first roller 12 and the second roller 14. The cloth band 16 is the roller 12, 1
It will be appreciated that it is necessary to move the storage roller 18 along the second roller 14 (to the right in FIG. 1) at an appropriate speed as it is wrapped around 4.

The first roller 12 and the second roller 14 are separated by a distance D which is determined with respect to the total length C (not shown) required for the base fabric layer being manufactured, the total length C being the endless length of the layer. Measured vertically (in the machine direction) around the shape of the loop. Woven band 16 having width w
Can move along the second roller 14 during winding,
It is spirally wound over the first and second rollers 12, 14 from the storage roller 18 in a number of turns. Successive turns of the fabric strip 16 are abutted together and glued together along a helical continuous seam 20 by sewing, embroidering, fusing or welding to create a base fabric layer 22 as shown in FIG. A sufficient number of turns of the fabric strip 16 have its width
The spiral winding is terminated when measured across the shape of the endless loop (in a direction perpendicular to the machine) to the desired width W for making layer 22. The resulting base fabric layer 22 has an inner surface, an outer surface, a machine direction and a direction orthogonal to the machine. Initially, the side edges of the base fabric layer 22 will not be parallel to its machine direction, and comprise a layer 22 having a desired width and two side edges parallel to the machine direction in the form of its endless loop. It must be clear that in order to do so, it must be cut off along line 24.

The fabric band 16 is woven from single fibers, twisted single fibers or multifilament yarns of a synthetic polymer resin such as polyester or polyamide, in the same manner as other fabrics used in the papermaking industry are woven. You may be. After weaving, it may be heat set in a conventional manner before intermediate storage on storage rollers 18. The fabric band 16 includes warp and weft yarns, where, for example, the warp yarns are twisted monofilament yarns while the weft yarns are monofilament yarns. Further, the fabric band 16 may be a single layer or a multi-layer woven.

Alternatively, the fabric strip 16 may be woven and heat set in a conventional manner, and fed directly from the heat set machine to the apparatus 10 without intermediate storage on storage rollers 18.
Depending on the choice of suitable materials and the structure of the product (weave, thread size and count), it may also be possible to omit the heat setting.
In such a situation, the fabric strip 16 will be supplied to the device 10 from the loom without intermediate storage on the storage rollers 18.

The fabric band 16 may also be a nonwoven mesh fabric of the type disclosed in Johnson, US Pat. No. 4,427,734, the teachings of which are incorporated herein by reference. A mesh cloth is a mesh-like structure of ridges or threads partitioned by a mesh. The monofilament-like elements making up the mesh are oriented in its longitudinal and transverse directions.

FIG. 3 is a cross-sectional view of the fabric band 16 indicated by line 3-3 in FIG. It consists of a warp 26 and a weft 28, both of which are represented as single fibers woven in a single layer weave. More specifically, although a plain weave is shown, it should be understood that the fabric band 16 may be woven according to any weave pattern commonly used to weave paper machine fabrics. The cloth band 16 is a base cloth layer 22.
The warp yarns 26 and the weft yarns 28 do not line up in the machine direction of the layer 22 and in the direction perpendicular to the machine, respectively. Rather, the warp 26 has a slight angle θ.
The magnitude of which is a measure of the pitch of the helical turns of the fabric strip 16 with respect to the machine direction of the layer 22, as suggested by its top view shown in FIG. As noted above, this angle is typically less than 10 °. Cloth obi 1
6 generally intersects the warp 26 at an angle of 90 °, so that the weft 28 makes the same slight angle θ with respect to the machine direction of the layer 22.

The woven band 16 has a first side edge 30 and a second side edge 32 which together define the width of the body of the woven band 16. When the fabric strip 16 is spirally wound over the first and second rollers 12, 14, the first side edge 30 of each turn is adjacent to the second side edge 32 of the immediately preceding turn. And attached there.

If desired, a second base fabric layer may be provided on the base fabric layer 22 prior to removing the base fabric layer 22 from the apparatus 10 for the multiaxial press fabric of the present invention. The second base fabric layer 34 may be made in the same manner as described above. Preferably, the second base fabric layer 34 starts from the right side of the second roller 14 of FIG. 1 and, rather than from the left side, as was the case in the manufacture of the base fabric layer 22, and the fabric band 16 By moving the storage roller 18 to the left along the second roller 14 at an appropriate speed as it is wrapped around 12, 14, a spiral may be produced in the opposite direction to that of the base fabric layer 22. Cloth Obi 16
Would have to be wound in a sufficient number of turns to completely cover the base fabric layer 22, and the side edges of the second base fabric layer 34 would be given parallelism in the machine direction and the base fabric It will be appreciated that it will have to be cut off to be identical to that of layer 22. The result is shown in FIG. 4, where the spiral continuous seam 20 of the base fabric layer 22
Is indicated by a dashed line. An additional layer spiraling in either direction is provided in the same manner.

FIG. 5 is an enlarged schematic view of a part of the outer surface of the base fabric 36 in which two layers are laminated. The second layer 34 in which the warp yarns 42 and the weft yarns 44 are represented by solid lines lies on the first layer 22 in which the warp yarns 38 and the weft yarns 40 are represented by chain lines. Warp 3
8 and warp 42 are both in the machine direction (MD) of the base cloth 36.
At a relatively small angle to the first layer 22
And the second layer 34 are spirals in opposite directions so that they intersect each other at a relatively small angle, each equal to the sum of the angles that make up the machine direction. Similarly, weft yarns 40 and weft yarns 44 both make a small angle to the machine orthogonal direction (CD) of base fabric 36 and are the sum of the angles each makes to the machine orthogonal direction. Intersect each other at a relatively small angle equal to In conclusion, the two-ply laminated base fabric 36 did not define a thread in the machine or machine orthogonal direction. Instead, the warp 38 and weft 40 of the first layer 22 and the second layer 34
Warp yarns 42 and weft yarns 44 lie in four different directions at an oblique angle to the machine and a direction perpendicular to the machine. For this reason, the base fabric 36 is considered to be multiaxial.

FIG. 6 is a perspective view of the multiaxial press cloth of the present invention. The press fabric 46 is in the form of an endless loop having an inner surface 48 and an outer surface 50 and comprises the base fabric 36.

The outer surface 50 of the multiaxial press fabric 46 has a plurality of layers of staple fiber material attached thereto by sewing. The stitching of the layer of staple fiber material into the outer surface 50 of the press fabric 46 also involves the individual stapling of the staple fiber material into and through the overlying first and second layers 22, 34 on which the stitches are overlaid. Because the fibers are inserted, the first and second layers 22, 34 of the base cloth 36 are also attached to each other. The staple fiber material may be polyamide, polyester or any other type of staple fiber used in the ordinary art of making paper machine fabrics. Generally, one or both of the inner and outer surfaces of the press fabric have multiple layers of staple fiber material attached thereto by sewing.

Within each of the plurality of layers of staple fiber material, the fibers are primarily oriented at an oblique angle to the machine direction of the multiaxial press fabric 46, of course, they are essentially perpendicular to it by stitching. Except for the case where it is inserted into and through the first and second layers 22, 34 of the base cloth 36 in the direction.

FIG. 7 is an enlarged schematic view of a part of the outer surface 50 of the press cloth 46. The individual fibers in the plurality of layers of staple fiber material are oriented primarily in the direction indicated by the crossed lines in the figure. These directions are at an oblique angle with respect to the machine direction, so that, except for the portion of the individual fibers that have been stitched into the base fabric 36, the fibers are predominantly with respect to the machine direction of the multiaxial press fabric 46. They are oriented at oblique angles and in those directions are substantially parallel to each other. The fibers in the layer lying directly above or below any given layer are oriented in two different directions, mainly as suggested by the cross-cross pattern in FIG.

Multiple layers of staple fiber material are disclosed in US Pat. 3,879,820 and 3,920,511, the teachings of which are incorporated herein by reference. These patents, which are related to those derived from applications that are separate from the ordinary parent application, indicate a nonwoven paper machine fabric that lacks a base fabric. Paper machine fabrics are made by crossing staple fiber batts, the fibers being the first floor apron to make a sheet with several layers of staple fiber batts.
(floor apron), parallel to each other in the longitudinal direction of the batter. In each of the several layers of the sheet, the fibers are oriented mainly at an angle of 45 ° to 85 ° with respect to their longitudinal direction.

The sheet is then consolidated to give it some sort of structural integrity, at which point the fibers in each layer are oriented at approximately a 66 ° angle with respect to the longitudinal direction of the sheet. Become.

At this time, the sheets are again cross-overlaid to a width equal to that desired for the nonwoven paper machine fabric. The fabric, consisting of several superimposed layers of the sheet, is then stitched together. The fibers of each layer of the fabric, which had been subjected to two successive crossover operations, lie in a direction at an angle of 10 ° to 40 ° with respect to the machine direction.

It is to be understood that the angular ranges cited in the preceding sections are determined by the parameters of the cross-over machine used in the actual production of the fabric.
In any case, the fibers in each layer of the fabric are oriented primarily in a direction that forms an oblique angle with respect to its longitudinal direction.

A plurality of layers of staple fiber material sewn into base fabric 36 to make multiaxial press fabric 46 of the present invention are assembled in accordance with the teachings of these patents with a width equal to that of base fabric 36 and To make the multiaxial press fabric 46 of the present invention, it is laid vertically and sewn around the outer surface of the base fabric 36.

[0044]

The present invention exhibits improved thickness retention, excellent long-term water treatment and pressure distribution, ease of cleaning, excellent sheet finish and improved machine orthogonal cross-section.

Modifications to the multiaxial press fabric of the present invention will be apparent to those skilled in the art, but will not result in a modified invention beyond the scope of the appended claims. For example, the base fabric may constitute one or more layers of a standard base fabric on one or more spiral wound layers. In other words, one or more additional layers may be formed by a fabric having a machine and a thread in a direction orthogonal to the machine and manufactured by techniques well known to those skilled in the art. Such a fabric may be endlessly woven in the dimensions required for the paper machine for which it is intended, or may be given an endless shape by a plain weave followed by a woven seam.
It may also be made by a modified endless weaving technique that can be seamed on a machine. Laminate fabrics having one or more standard base fabric layers can also be used.

Further, the multiaxial press fabric of the present invention may include one or more layers of a standard staple fiber material; a randomized staple fiber material; or a vertically oriented staple fiber material;
The fibers of the standard staple fiber material have a more arbitrary orientation than the angled woven fibers.

[Brief description of the drawings]

1 is a schematic top view illustrating a method of manufacturing one of the layers of the base fabric of the multiaxial press fabric of the present invention.

FIG. 2 is a top view of the finished layer of the base fabric.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a top view of a base fabric in which two layers are laminated in the multiaxial press fabric of the present invention.

FIG. 5 is an enlarged schematic view of a part of an outer surface of a base fabric in which two layers are laminated.

FIG. 6 is a perspective view of the multiaxial press cloth of the present invention.

FIG. 7 is an enlarged schematic view of a part of the outer surface of the multiaxial press cloth.

[Explanation of symbols]

 Reference Signs List 16 Woven fabric band (cloth band) 20 Spiral continuous seam 22 Basic fabric layer (first layer) 24 wires 34 Second basic fabric layer (second layer) 36 Basic fabric 38, 42 Warp 40, 44 Weft 46 Multiaxial Press cloth 48 Inside surface 50 Outside surface

Claims (40)

[Claims] 1. A multi-axial press cloth for a press section of a paper machine, comprising: (1) a base cloth: the base cloth has a first layer;
The first layer comprises a band of a first cloth, the band of the first cloth has a first side edge and a second side edge, and the first layer of the band of the first cloth has a first side edge. In a number of adjacent turns, one side edge of which is adjacent to the second side edge of the turn adjacent thereto, the first fabric band is spirally wound, so that the first fabric band is adjacent to the first fabric band. A spiral continuous seam distinguishing the turns is formed, said spiral continuous seam being closed by adhering adjacent first and second side edges of the first fabric strip to one another, thereby providing a mechanical The first layer and the base fabric in the form of an endless loop having a direction, a direction orthogonal to the machine, an inner surface and an outer surface.
And (2) a plurality of layers of staple fiber material attached to one of the inner and outer surfaces of the base fabric: the fibers in each of the plurality of layers of staple fiber material are primarily with respect to the machine direction. Are oriented substantially parallel to each other in a direction forming an oblique angle, the oblique angle in each of the plurality of layers is substantially the same, and the direction in each of the plurality of layers is Said multi-axial press fabric, consisting of cross-woven weaves, facing in the direction of each layer immediately below or directly above. 2. The multiaxial press fabric according to claim 1, wherein the band of the first fabric is woven from warp and weft. 3. The multiaxial press fabric according to claim 1, wherein the first fabric band is a non-woven mesh fabric having vertical and horizontal elements. 4. The base fabric further comprises a second layer, the second layer comprising a second fabric band, wherein the second fabric band has a first side edge and a second side edge. Having the first side edge of one turn of the second cloth band having a number of adjacent turns adjacent to the second side edge of the adjacent turn, wherein the second cloth band is spiral Wound, thereby forming a spiral continuous seam that distinguishes adjacent turns of the second fabric band, the spiral continuous seam being adjacent to the first fabric band of the second fabric band. The second layer in the form of an endless loop having a machine direction, a direction orthogonal to the machine, an inner surface and an outer surface, the second layer being closed by adhering the first and second side edges to each other. The endless loop formed by two layers is the endless loop formed by the first layer. The multi-axial press fabric of claim 1, wherein the fabric is nested within a resloop. 5. The multiaxial press cloth according to claim 4, wherein the band of the second cloth is spirally wound in a direction opposite to a direction in which the band of the first cloth is spirally wound. 6. The multiaxial press fabric according to claim 4, wherein the band of the second fabric is woven from warp and weft. 7. The multiaxial press fabric according to claim 4, wherein the band of the second fabric is a non-woven mesh fabric having vertical and horizontal elements. 8. The base fabric further comprises at least one additional layer, the additional layer comprising an additional fabric band, the additional fabric band having a first side edge and a second side edge. Wherein the first side edge of one turn of the additional cloth strip is spirally wound with a number of adjacent turns adjacent to the second side edge of the adjacent turn. Forming a spiral continuous seam that distinguishes adjacent turns of the additional fabric band, wherein the spiral continuous seam is adjacent first and second side edges of the additional fabric band. The additional layer in the form of an endless loop having a machine direction, a direction perpendicular to the machine, an inner surface and an outer surface,
5. The multi-axial press cloth according to claim 4, wherein the endless loop formed by the additional layer is nested within the endless loop formed by the first and second layers. 9. The multi-axial press cloth according to claim 8, wherein the band of the additional cloth is woven from warp yarns and weft yarns. 10. The multi-axial press fabric according to claim 8, wherein the band of the additional fabric is a non-woven mesh fabric having vertical and horizontal elements. 11. The base fabric further comprising a standard base fabric having yarns in a machine direction and a direction perpendicular to the machine, wherein the standard fabric is in a machine direction, a direction perpendicular to the machine,
The multiaxial press fabric of claim 1 in the form of an endless loop having an inner surface and an outer surface. 12. The multi-axial press fabric according to claim 11, wherein said endless loop formed by said standard base fabric is nested within said endless loop formed by said first layer. 13. The multi-axial press fabric according to claim 11, wherein the standard base fabric is endless. 14. The multiaxial press fabric according to claim 11, wherein the standard base fabric is seamable on a machine. 15. The multiaxial press fabric according to claim 2, wherein the band of the first fabric is a single-layer weave. 16. The multiaxial press fabric according to claim 2, wherein the first fabric band is a multilayer fabric. 17. The multi-axial press fabric according to claim 2, wherein the warp yarn and the weft yarn of the band of the first fabric are made of a synthetic polymer resin. 18. The multi-axial press fabric according to claim 1, wherein the first layer of the base fabric has side edges trimmed in a direction parallel to the machine direction. 19. The multiaxial press fabric according to claim 1, wherein the band of the first fabric forms an angle of 10 degrees or less with the machine direction of the first layer. 20. The multiaxial press fabric according to claim 6, wherein the band of the second fabric is a single-layer weave. 21. The multi-axial press fabric according to claim 6, wherein the band of the second fabric is a multi-layer fabric. 22. The multiaxial press fabric according to claim 6, wherein the warp yarn and the weft yarn of the second fabric band are made of a synthetic polymer resin. 23. The multiaxial press fabric according to claim 4, wherein the second layer of the base fabric has side edges trimmed in a direction parallel to the machine direction. 24. The multi-axial press fabric according to claim 1, wherein the band of the second fabric forms an angle of 10 degrees or less with the machine direction of the second layer. 25. The multi-axial press cloth according to claim 9, wherein the band of the additional cloth is a single-layer weave. 26. The multiaxial press fabric according to claim 9, wherein the additional fabric band is a multilayer fabric. 27. The multiaxial press cloth according to claim 9, wherein the warp and the weft of the belt of the additional cloth are made of a synthetic polymer resin. 28. The multiaxial press fabric of claim 8, wherein said additional layer of said base fabric has trimmed side edges in a direction parallel to said machine direction. 29. The multi-axial press fabric of claim 8, wherein the band of additional fabric forms an angle of 10 degrees or less with the machine direction of the layer. 30. The multiaxial press fabric according to claim 11, wherein the standard base fabric is a single-layer weave. 31. The multiaxial press fabric according to claim 11, wherein the standard base fabric is a multi-layer fabric. 32. The multiaxial press cloth according to claim 11, wherein the standard base cloth is laminated. 33. The multiaxial press cloth according to claim 11, wherein the warp yarn and the weft yarn of the standard base cloth are made of a synthetic resin. 34. The staple fiber material further comprising a plurality of layers of staple fiber material attached to the other of the inner and outer surfaces of the base fabric, wherein the fibers in each of the plurality of layers of staple fiber material are primarily Oriented substantially parallel to each other in a direction forming an oblique angle to the machine direction, wherein the oblique angles in each of the plurality of layers are substantially the same, and the plurality of layers 2. The multi-axial press fabric of claim 1, wherein the directions in each of the layers are opposite to the direction of each layer immediately below or directly above to create a cross-cross weave. 35. The staple fiber material further comprising a plurality of layers of staple fiber material stitched to one of the inner and outer surfaces of the base fabric, wherein the staple fiber material is a standard staple fiber material, a randomized staple. The multiaxial press fabric of claim 1, wherein the multiaxial press fabric is selected from the group consisting of a fiber material and a vertically oriented staple fiber material. 36. The staple fiber material further comprises a plurality of layers of staple fiber material stitched to the other of the inner and outer surfaces of the base fabric, wherein the staple fiber material is a standard staple fiber material, a randomized staple fiber. 36. The multiaxial press fabric of claim 35, wherein the fabric is selected from the group consisting of materials and longitudinally oriented staple fiber materials. 37. The multiaxial press cloth according to claim 1, wherein the staple fiber material is made of a polymer resin material. 38. The multiaxial press fabric according to claim 37, wherein said polymeric resin material is selected from the group consisting of polyamide and polyester resins. 39. The multiaxial press cloth according to claim 35, wherein the staple fiber material is made of a polymer resin material. 40. The multi-axial press fabric of claim 39, wherein said polymeric resin material is selected from the group consisting of polyamide and polyester resins.