JP5192021B2 - Woven fabric for paper machine - Google Patents

Description

  The present invention relates to a paper machine woven fabric, and more particularly to a forming fabric.

The meaning of the word in this specification is as follows in principle.
(1) About 1st thread | yarn 1st thread | yarn is a thread | yarn which mainly comprises a 1st woven fabric layer, and includes both warp and weft. For example, the yarn constituting the first woven fabric layer and corresponding to the warp is referred to as “first warp”. Further, the yarn constituting the first woven fabric layer and corresponding to the weft is referred to as “first weft”. In short, the word “first” is attached to the beginning of the yarn constituting the first woven fabric layer.
The yarn constituting the first woven fabric layer and corresponding to the weft is referred to as “first xx weft”, and the function is added to the “xx” portion. For example, the yarn constituting the regular plain weave portion of the first woven fabric layer is referred to as “first basic weft”. The yarn having the function of connecting to the second woven fabric layer is referred to as “first combined weft”.
(2) About the second yarn The second yarn is a yarn mainly constituting the second woven fabric layer and includes both warp and weft. For example, the yarn constituting the second woven fabric layer and corresponding to the warp is referred to as “second warp”. The yarn constituting the second woven fabric layer and corresponding to the weft is referred to as “second weft”. In short, the word “second” is attached to the beginning of the yarn constituting the second woven fabric layer.
(3) About the basic yarn The yarn constituting the plain weave is called the basic yarn.
(4) Bonding yarn A yarn that bonds two woven fabric layers across adjacent woven fabric layers is called a binding yarn.
(5) Engagement The two yarns are in a positional relationship where they intersect when viewed in plan, and one yarn is the other of the other yarns as in the relationship between the weft yarns A1 to A7 and the warp yarn B in FIG. A case in which a part of the circumference is surrounded is called “engagement”. Conversely, when only a part of the yarn is in contact like the wefts A4 and A5 in FIG. 8, it is not “engagement”. In FIG. 8, the relationship between the weft yarns A1 to A3 and the warp yarn B is “engagement”. The relationship between the weft A6 and the warp B is also “engagement”.
(6) Bond point The meaning of a bond point is narrowly defined and broadly defined. In the narrow sense, the bonding point means a contact point where a yarn constituting one layer contacts a yarn constituting the other layer. In the broad sense, the bonding point means a planar region where the yarn constituting one layer contacts the yarn constituting the other layer. Therefore, there is a thread of the first woven fabric layer in contact with the second woven fabric layer. In the case where there are the first woven fabric layer 100 and the second woven fabric layer 200 as shown in FIG. 9 and the warp C of the first woven fabric layer 100 is in contact with the weft B6 of the second woven fabric layer 200, a narrow sense of bonding The point is the contact point between the warp yarn C of the first woven fabric layer 100 and the weft yarn B6 of the second woven fabric layer 200, and the connecting point in a broad sense is an area surrounded by a broken line, and the first woven fabric in the upper part The weft A6 of the fabric layer 100 is included.

  The present invention relates to a woven fabric for a paper machine, particularly a forming fabric, and has a first woven fabric layer and a second woven fabric layer, and the first woven fabric layer is provided on the paper side and includes a first yarn. The first yarns are interwoven to form a repeating unit of the first woven fabric that repeats, the second woven fabric layer is provided on the machine side and consists of the second yarn, and the second yarns are interwoven and repeated Forming a repeating unit of the second woven fabric, the two woven fabric layers are coupled to each other by a first binding yarn of the first yarns, the first yarn extending in one direction, The first basic yarn is divided into a basic yarn and a first binding yarn, the first basic yarn forms a plain weave together with the first yarn orthogonal to the first basic yarn, and the first binding yarn is orthogonal to the first binding yarn. A plain weave is partially formed with one yarn, and the first binding yarn is at least one of the second yarns orthogonal to the first binding yarn and the outer side It is a first thread that engages at a certain joining point, moves from the first woven fabric layer to the second woven fabric layer, and vice versa, and is orthogonal to the first joining yarn, ), The number of first yarns not engaged by the first connecting yarn is at least two more than the number of second yarns engaged at the connecting point (actual connecting point in a narrow sense). Regarding cloth.

That is, the present invention is a woven fabric for a paper machine having a first woven fabric layer and a second woven fabric layer, and the first woven fabric layer is used facing the paper side.
The first woven fabric layer is a plain woven fabric having a basic configuration, and is composed of warp and weft as the first yarn. The weft yarn or warp yarn constituting the first woven fabric layer is functionally divided into a first binding yarn and a first basic yarn. For example, the weft yarn constituting the first woven fabric layer is functionally divided into a first binding yarn and a first basic yarn.
The second woven fabric layer is not particularly limited in the woven structure.
Further, the first woven fabric layer and the second woven fabric layer are bonded by the first binding yarn. That is, the first binding yarn is a weft yarn (or warp yarn) that constitutes a plain weave fabric that is the first woven fabric layer, and a part of the first binding yarn extends to the second woven fabric layer side to form the second woven fabric layer yarn. It is tangled.
Therefore, in the region where the first binding yarn extends toward the second woven fabric layer and is entangled with the yarn of the second woven fabric layer, the first binding yarn can contribute to the plain weave structure of the first woven fabric layer. It cannot be done, and it becomes a skipping state.
Further, the present invention is for a paper machine having a configuration in which the number of yarns (for example, warp yarns) in the first woven fabric layer that are skipped is at least two more than the number of yarns entangled with the second woven fabric layer. Intended for woven fabrics.

The paper machine woven fabric is used in a paper machine and supports a paper web.
These are endless woven fabrics, or woven fabrics that are endlessly shaped by stitching, and circulate in the paper machine.
In the first part of the paper machine, the forming fabric is used in the top layer where the papermaking pulp is first placed, and the papermaking pulp is drained through the forming fabric to form a paper web.

A paper machine woven fabric having two woven fabric layers arranged one above the other is known as a forming fabric, and the first woven fabric layer, i.e., the woven fabric layer disposed on the paper side, has the first warp and The second woven fabric layer, that is, the woven fabric layer arranged on the machine side, is composed of the second warp yarn and the second weft yarn.
In both woven fabric layers, the first yarn (first warp and first weft) and the second yarn (second warp and second weft) form a repeating unit of the first and second woven fabrics that repeat. doing.
Examples of such types of paper machine fabrics that are particularly suitable for use in a web forming section of a paper machine are WO 2005/014926, WO 2005/017254, WO 2006 /. Citation from US Patent No. 083604, European Patent Application Publication No. 0794283, European Patent No. 1693506, European Patent No. 1586696, European Patent No. 0998607, and European Patent No. 1506339 it can.

The connection between the two woven fabric layers is effected by a bonded weft. The combined weft forms part of the repeating unit of each first yarn. That is, unlike an independent binding thread, it constitutes a thread in or within the structure.
Engagement with the joining weft according to the repeating unit of the first warp is interrupted only at the joining point.
Here, the combined weft is engaged between one second warp and the outside (machine side) between the two first warps that are engaged on the outside (paper side). Between these first warps, the combined weft does not engage any further first warps.
For this purpose, the binding weft transitions from the first woven fabric layer to the second woven fabric layer, engages with the second warp yarn and returns to the first woven fabric layer again.

  In the paper machine woven fabric of the type described above, the binding wefts are woven together in pairs. That is, two combined weft yarns are always arranged between the two first basic yarns, and the first basic yarns are not bonded yarns and are engaged with the first warp yarns and the plain weave at a constant interval. Yes.

In the embodiment disclosed in EP 1506339, the first binding yarn is engaged with the first warp in a plain weave, but interrupted at the connection point.
In order to complete two yarn paths formed by two adjacent bonded weft yarns, a replacement weft yarn is further provided between adjacent pairs of bonded yarns.

International Publication No. 2005/014926 International Publication No. 2005/017254 International Publication No. 2006/083604 European Patent Application No. 0794283 European Patent No. 1693506 European Patent No. 1586696 European Patent No. 0998607 European Patent No. 1506339

Known paper machine woven fabrics have regular rectangular or square drain holes.
Nevertheless, the weaving structure produces a plain weave surface with interruptions.
This impairs the quality of the paper and adds marks to the paper web.

  The object underlying the present invention is to devise a woven fabric for a paper machine, particularly a woven fabric for use in a web forming section of a paper machine that has improved drainage characteristics and is less likely to form marks.

According to the present invention, the above object can be achieved by arranging only one first binding yarn between two adjacent first basic yarns.
In particular, if the first binding yarn is arranged directly adjacent to two adjacent one basic yarns, there is no other yarn other than the first binding yarn between the two adjacent basic yarns. .

The basic concept of the present invention is to reduce the number of bonded yarns between two adjacent basic yarns to only one.
Thereby, the structure which has the drain hole of the irregular shape distributed evenly on the paper side can be created.
The drain hole formed between two adjacent first yarns, that is, the first basic yarn and the first binding yarn, has a lens shape having a flat surface and a concave surface.
The orientation of the drain holes in the longitudinal direction sufficiently supports the fiber structure, particularly when the first binding yarn and the first base yarn extend in the direction intersecting the machine direction, that is, in the lateral direction.
Such a unique drainage surface pattern provides the paper sheet with a drainage structure that is essentially different from that produced with a regular square drainage surface pattern.

In an embodiment of the present invention, the first connecting yarn extends as a first connecting weft in a direction perpendicular to the running direction of the paper machine woven fabric, and is engaged with at least one second warp at the connecting point.
This embodiment fully supports the fiber structure, which is particularly important when the paper machine woven fabric is designed as a forming fabric.
Nevertheless, as another aspect, it is also possible that the first binding yarn extends as a first binding warp in the running direction of the paper machine woven fabric and engages with at least one second weft at the connecting point. .

When the first connecting yarn engages with only one second yarn at the connecting point, generally only three of the first yarns extending perpendicular to the connecting yarn are engaged by the first connecting yarn at the connecting point. Not matched.
However, it is also effective that the first connecting yarn engages with two or more, for example, two or three second yarns at the connecting point.
However, it must be recognized here that the first binding yarn is less in the first woven fabric layer, i.e. there is a large spacing at any bonding point.

In another embodiment, the second yarn engaged by the first connecting yarn and the first yarn parallel to the second yarn form a pair of yarns that overlap each other at the connecting point, and the first yarn of the pair The yarn is engaged by the first base yarn adjacent to the first binding yarn, just as the second yarn is engaged by the first binding yarn.
Furthermore, it is effective when the first binding yarn is separated from the adjacent first binding yarn by only one first basic yarn extending parallel to the yarn. That is because in that case two adjacent foundation yarns are brought close to each other at the joining point of the first joining yarn extending between the two foundation yarns, thereby forming a drainage hole having a lens shape. .
However, the number of first basic yarns between two adjacent first binding yarns can be two or more, for example two, three, or up to four.

  In still another embodiment of the present invention, at least one pair of first and second yarns arranged one above the other is adjacent to the second yarn engaged by the first coupling yarn at the coupling point. It extends and passes between the two first yarns and the second yarn when the first binding yarn moves through the woven fabric layer.

  To reduce the number of bond points, the first bond thread passes under the first thread orthogonal to the first bond thread between two adjacent bond points in its extension, and the first thread It is possible to extend symmetrically. The number of the first yarns extends in parallel at the joining point and coincides with the number of the first yarns that are not engaged by the first joining yarns.

The basic concept supporting the present invention is suitable for a woven fabric for a paper machine in which the number of first yarns orthogonal to the first binding yarn is at least equal to the number of second yarns parallel to the first yarn. . That is, the ratio of the number of the first yarn and the second yarn is 1: 1.
However, ratios of 2: 1, 3: 2, 1: 2, or 2: 3 are also conceivable without any limitation in this regard.
Furthermore, the ratio of the sum of the number of first basic yarns parallel to the first basic yarn and the first basic yarn to the number of second yarns parallel to the first basic yarn is 1: 1, 2: 1, or 3 : 2 is good.

The present invention does not exclude having a second binding yarn formed by the second yarn in addition to the first binding yarn.
The second binding yarn is preferably orthogonal to the first binding yarn, and engages with at least one first yarn orthogonal to the second binding yarn at the connection point.

  In this type of paper machine woven fabric, that is, a fabric in which a woven fabric layer is bonded by a binding thread in the structure or in the interior, the second woven fabric layer has at least 4 shafts (harness), and a maximum of 24 It is particularly suitable for woven fabrics woven on shafts, especially 6 or 8 shafts.

As the yarn material, any synthetic fiber commonly used in paper machine woven fabrics, particularly forming fabrics, is suitable.
It is convenient if the yarn extending in the running direction of the paper machine woven fabric is polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or a mixture or copolymer thereof.
The yarn orthogonal to the running direction may be PET, polyamide (PA), a mixture or copolymer thereof, or a blend of these and polyurethane (PU).

Regarding the cross-sectional shape of the yarn, any known cross-sectional shape is possible, and in particular, there is a circular shape, an elliptical shape, a rectangular shape, or a shape having another external shape.
Furthermore, the yarn may be made by using or knitting at least two monofilaments or multifilaments.
Furthermore, the yarn may be coated, in particular with a urethane or acrylic material, or with nanoparticles.

The invention according to claim 1 is a paper machine woven fabric, particularly a forming fabric, mounted on a paper machine, and has a first woven fabric layer and a second woven fabric layer,
The first woven fabric layer is a layer that becomes a paper side when mounted on a paper machine, and a plurality of first woven fabric layer constituting yarns are interwoven to form a repeating unit of the first woven fabric that repeats. And
The second woven fabric layer is a layer on the paper machine side when being attached to the paper machine, and a plurality of second woven fabric layer constituting yarns are interwoven with each other and repeat the second woven fabric repeating unit. Forming,
The first woven fabric layer and the second woven fabric layer are bonded to each other by a first binding yarn, and the first binding yarn is included in the first woven fabric layer constituting yarn,
The first woven fabric layer constituting yarn includes a first base yarn extending in the same direction as the first binding yarn, and a first cross yarn extending in a direction intersecting the first base yarn,
The first base yarn forms a plain weave with the first cross yarn, the first binding yarn forms a plain weave partially with the first cross yarn;
The first binding yarn is a second woven fabric layer-constituting yarn and is engaged with at least one of the second cross yarns intersecting the first binding yarn at a binding point outside the second woven fabric layer. Transition from the first woven fabric layer to the second woven fabric layer and vice versa,
The first cross yarn is not engaged with the first joint yarn in a region near the joint point, and the number of the first cross yarns not engaged is the number of the second cross yarns engaged at the joint point. A woven fabric for a paper machine that is at least two more than the number,
A woven fabric for a paper machine, wherein only one first binding yarn is disposed between two adjacent first basic yarns.

  The invention described in claim 2 is characterized in that the first binding yarn is directly adjacent to two adjacent first basic yarns, and there is one first basic yarn on both sides of the first binding yarn. A woven fabric for a paper machine according to claim 1.

  According to a third aspect of the present invention, the first binding yarn extends as a first binding weft perpendicular to the running direction of the paper machine woven fabric, and engages with at least one second warp at the connecting point, or The first binding yarn extends as a first binding warp in the running direction of the paper machine woven fabric and engages with at least one second weft at the connecting point. A woven fabric for paper machines.

  The paper machine according to any one of claims 1 to 3, wherein the first binding yarn is engaged with one second woven fabric layer constituting yarn at the connecting point. It is a woven fabric.

  According to a fifth aspect of the present invention, the second woven fabric layer constituting yarn engaged by the first binding yarn and the first woven fabric layer constituting yarn parallel to the second woven fabric layer constituting yarn overlap each other vertically. A pair of yarns is formed at a joining point, and one of the first woven fabric layer constituting yarns constituting the pair is engaged by a first base yarn adjacent to the first joining yarn. Item 4. A paper machine woven fabric according to any one of Items 1 to 3.

  According to a sixth aspect of the present invention, the first binding yarn is separated from the adjacent first binding yarns by one first basic yarn or a plurality of first basic yarns extending in parallel to the yarn. The woven fabric for a paper machine according to any one of claims 1 to 5, wherein the number of first basic yarns extending in parallel between adjacent first binding yarns is four at the maximum.

  According to the seventh aspect of the present invention, at least one pair of the first woven fabric layer constituting yarn and the second woven fabric layer constituting yarn arranged one above the other is engaged by the first binding yarn at the joining point. The two first woven fabric layer-constituting yarns extend adjacent to the second woven fabric layer-constituting yarn, and the first binding yarn transitions between the first woven fabric layer and the second woven fabric layer. The paper machine woven fabric according to any one of claims 1 to 6, wherein the woven fabric passes through between the second woven fabric layer constituting yarns.

  In the invention according to claim 8, the first bonding yarn passes under the first woven fabric layer constituting yarn orthogonal to the first bonding yarn between two adjacent bonding points in the extending portion, The number of first woven fabric layer constituting yarns extends symmetrically with respect to one woven fabric layer constituting yarn, and the number of first woven fabric layer constituting yarns extends in parallel at the joining point and is not engaged by the first joining yarn. The woven fabric for a paper machine according to any one of claims 1 to 7, wherein the woven fabrics are identical.

  In the invention according to claim 9, the ratio of the number of first cross yarns to the number of second woven fabric layer constituting yarns parallel to the yarns is 1: 1, 2: 1, 3: 2, 1: 2. Or it is 2: 3, The woven fabric for paper machines in any one of Claims 1-8 characterized by the above-mentioned.

  The invention according to claim 10 is a ratio of the sum of the number of the first binding yarn and the number of the first basic yarns parallel to the first binding yarn to the number of the second woven fabric layer constituting yarns parallel to the first basic yarn. Is a woven fabric for a paper machine according to any one of claims 1 to 9, wherein the ratio is 1: 1, 2: 1, or 3: 2.

  The invention according to claim 11 has a second binding yarn included in the second woven fabric layer constituting yarn in addition to the first binding yarn, the second binding yarn being orthogonal to the first binding yarn, and The papermaking according to any one of claims 1 to 10, wherein the second binding yarn engages with at least one first woven fabric layer constituting yarn orthogonal to the second binding yarn at a connecting point. It is a machine woven fabric.

  The invention according to claim 12 is characterized in that the second woven fabric layer is woven into at least 4 shafts and at most 24 shafts, and the weaving for paper machines according to any one of claims 1 to 11 It is cloth.

  In the invention according to claim 13, the yarn extending in the running direction of the paper machine woven fabric is polyethylene terephthalate, polyethylene naphthalate, or a mixture or copolymer thereof, and / or the yarn orthogonal to the running direction. The woven fabric for a paper machine according to any one of claims 1 to 12, which is a blend of polyethylene terephthalate, polyamide, or a mixture or copolymer thereof, or a polyurethane thereof.

  The invention according to claim 14 is characterized in that the yarn has a circular shape, an elliptical shape, a rectangular shape, or a cross-sectional shape having a different external shape. It is.

  In the invention described in claim 15, the yarn is produced by using or knitting at least two monofilaments or multifilaments, and / or using urethane or acrylic material, or using nanoparticles. The woven fabric for a paper machine according to any one of claims 1 to 14, wherein the fabric is coated.

  The paper machine woven fabric of the present invention has excellent drainage characteristics and is difficult to form marks.

It is sectional drawing of the woven fabric for 1st paper machines. It is the top view which looked at the woven fabric for paper machines shown in FIG. 1 from the paper side. It is sectional drawing of the woven fabric for 2nd paper machines. It is sectional drawing of the woven fabric for 3rd paper machines. It is sectional drawing of the woven fabric for 4th paper machines. It is sectional drawing of the woven fabric for 5th paper machines. 6A is a cross-sectional view similar to FIG. 1, and FIG. 6B is a cross-sectional view taken along the line AA in FIG. 6A. It is explanatory drawing explaining the name of each part of the woven fabric for paper machines. It is explanatory drawing explaining the name of each part of the woven fabric for paper machines. It is explanatory drawing explaining the name of each part of the woven fabric for paper machines.

The drawings illustrate the invention by means of examples. It is shown below.
A paper machine woven fabric 1 shown in FIG. 1 has a first woven fabric layer 2 on the paper side and a second woven fabric layer 3 on the machine side. The woven fabric layers 2 and 3 are above and below each other.

The first woven fabric layer 2 is composed of a first warp (for example, represented by 4) extending in the running direction of the paper machine woven fabric 1 and a first weft extending in the transverse direction to the first warp. The cross-sectional shape is a circle.
The first weft includes a first basic weft 5 and a first combined weft 6.
The two types of yarns 5 and 6 are alternately arranged in the direction of the first warp yarn 4.
The first basic weft 5 is interwoven with the first warp 4 in a plain weave, and the first combined weft 6 is partly in a plain weave between adjacent joint points 7 and 8, that is, one first weft. Engage with the first warp thread 4, such as on one warp thread 4, below the adjacent first warp thread 4, above the adjacent first warp thread 4.

The second woven fabric layer 3 is composed of a second warp (for example, represented by 9) and a second weft 10 (only one of them is shown here) extending in the running direction of the woven fabric 1. .
Each of the second weft yarns 10 passes under the five second warp yarns 9 and passes outside (machine side), and then engages with one second warp yarn 9 by a knuckle 11.
It can be said that the long floating portion (float) of the second weft 10 is a weft runner.
Similarly to the second weft 10, the second warp 9 has a circular cross-sectional shape.

  The ratio of the number of the first warps 4 and the second warps 9 is 1: 1. That is, two first and second warps 4 and 9 are paired so that one first warp 4 extends on one second warp 9 and overlaps vertically.

The first combined weft yarn 6 is engaged with the second warp yarn 9 at the connection points 7 and 8 at a fixed interval, and the knuckles 12 and 13 are formed on the outer side (machine side) while forming the two woven fabric layers 2 and 2. 3 is connected.
At each joining point 7, 8, each first joining weft thread 6 passes between a pair 14 of first and second warp threads 4, 9 that overlap each other, and on the outer side (machine side), with an adjacent second warp thread 9. Engage.
Further, the first combined weft thread 6 again passes between the pair 15 of the first and second warp threads 4 and 9 that overlap each other, engages with the adjacent first warp thread 4 on the outer side (paper side), and has a plain weave shape. Proceed to
At the next joining point 8, the first joining weft thread 6 extends in the same manner.
That is, at each coupling point 7, 8, three adjacent first warp threads 4 are not engaged by the first combined weft thread 6, but only engaged by two adjacent first basic weft threads 5. Yes.
Due to this pattern, the first warp 4 that is on the second warp 9 and engaged by the first combined weft 6 extends below the thread 4 and extends next to the first combined weft 6. Engaged by the first basic weft thread 5.

FIG. 2 shows a region containing the first warp 4 (black), the first basic weft 5 (dark grey), and the first combined weft 6 (light grey).
As can be seen, the first combined weft thread 6 extends substantially linearly, and the first basic weft thread 5 extends in a wave shape.
At the joining points 7 and 8, for example, at the joining point 7, the first joining weft thread 6 moves to the second woven fabric layer 3 (not shown in FIG. 2), and the two first basic weft threads 5 adjacent thereto are The first warp yarns 4 extending above the yarn 5 are brought close to each other and thus partially overlap the first binding yarn 6.
Due to the displacement of the first basic weft 5, a drain hole having a lens shape (for example, represented by 16 and 17) is formed. The plane forming the lens is constituted by the first combined weft yarn 6 adjacent to the first basic weft yarn 5, and the concave surface forming the lens is constituted by the first basic weft yarn 5.
The drain holes 16 and 17 are regularly distributed on the paper side of the first woven fabric layer 2 and have a long direction perpendicular to the running direction, so that they are excellent for supporting fibers.

The paper machine woven fabric 21 shown in FIG. 3 is slightly different from the paper machine woven fabric 1 shown in FIG. 1, and therefore, the same parts in FIG.
The only difference from the paper machine woven fabric 1 is that there is no connection point 8, and therefore the space between the connection points 7 is doubled. Instead of the joining point 8, the first joining weft thread 6 passes under three consecutive first warp threads 4.
If the embodiment shown in FIG. 3 is changed, the change in which the plain weave is continued instead of the above-described floating portion so that the connection by the plain weave extends between the two connection points 7 without interruption. Is possible.

The paper machine woven fabric 31 shown in FIG. 4 is also slightly different from the paper machine woven fabric 1 shown in FIG. 1, and the same parts are denoted by the same reference numerals in FIG. Refer to the description of the woven fabric 1 in FIG. 1 for these portions.
The only difference is the ratio of the number of first and second warp threads 4,9.
The ratio here is 1: 2, and the first and second warp yarns 4 and 9 are formed such that pairs 14 and 15 in which both warp yarns 4 and 9 are up and down are formed every other second warp yarn 9. Has been placed.
With this arrangement, the gap on the paper side of the first woven fabric layer 2 becomes wider, and the drainage holes become longer than the drainage holes 16 and 17 shown in FIG.
Similar to the embodiment shown in FIGS. 1 to 3, the joining points 7 and 8 can be replaced by the knuckles 12 and 13 of the second weft yarn 10.

The paper machine fabric 41 shown in FIG. 5 is different from the paper machine fabric 1 of FIG. 1 only in the ratio of the number of first and second warps 4.9.
Accordingly, in FIG. 5 as well, the same number is assigned to the same part.
Here, the ratio is 3: 2. That is, every second warp yarn 9 is omitted, and the floating portion of the second weft yarn 10 extends under the five second warp yarns 9, and the distance is long, so Two connecting points 7 and 8 are formed in the middle of the yarn section, that is, between the two knuckles 11.

The paper machine woven fabric 51 shown in FIGS. 6 (a) and 6 (b) is only slightly different from the paper machine woven fabric 1 shown in FIG. 1, and therefore, the same parts in FIG. The code is attached.
What is different from the paper machine woven fabric 1 is that, in addition to the first binding yarn 6, the second binding yarn 52 included in the second yarn is included, and the second binding yarn 52 is orthogonal to the first binding yarn 6, In addition, the second coupling yarn 52 is engaged with at least one first yarn 4 orthogonal to the second coupling yarn 52 at the coupling point.

The paper machine woven fabric described above is a paper machine woven fabric (1, 21, 31, 41), in particular a forming fabric, comprising a first woven fabric layer (2) and a second woven fabric layer (3). The first woven fabric layer (2) is provided on the paper side and is composed of the first yarns (4, 5, 6). The first yarns (4, 5, 6) are interwoven and repeated first. Forming a repeating unit of the woven fabric, the second woven fabric layer (3) is provided on the machine side and is composed of the second yarn, and the second yarn is interwoven with each other to repeat the repeating unit of the second woven fabric. Forming,
The first woven fabric layer and the second woven fabric layer (2, 3) are bonded to each other by the first binding yarn (6) of the first yarn (5, 6),
The first yarn (5, 6) extends in one direction and is divided into a first basic yarn (5) and a first combined yarn (6). The first basic yarn (5) is the first basic yarn (5). A plain weave is formed with the first yarn (4) orthogonal to the yarn (5), and the first binding yarn (6) is partially plain weave with the first yarn (4) orthogonal to the first binding yarn (6). Form the
The first connecting yarn (6) is engaged with at least one of the second yarns (9) orthogonal to the first connecting yarn (6) at the outer connecting points (7, 8), Transition from the first woven fabric layer (2) to the second woven fabric layer (3) and vice versa,
The number of first yarns (4) that are orthogonal to the first coupling yarn (6) and are not engaged at the coupling points (7, 8) is the number of coupling yarns (7, 8). A woven fabric for a paper machine that is at least two more than the number of second yarns engaged;
A woven fabric for a paper machine, wherein only one first binding yarn (6) is disposed between two adjacent first basic yarns (5).

  The first binding yarn (6) is directly adjacent to two adjacent first basic yarns (5), that is, there is one first basic yarn (5) on both sides of the first binding yarn (6). A paper machine woven fabric as described above, characterized in that

  Further, the first connecting yarn extends as a first connecting weft yarn (6) perpendicular to the running direction of the paper machine fabric (1, 21, 31, 41), and at least one piece is provided at the connecting point (7, 8). Engage with the second warp yarn (9) or the first binding yarn extends as a first binding warp yarn in the running direction of the paper machine woven fabric and engages with at least one second weft yarn at the joining point. A woven fabric for a paper machine as described above.

  The woven fabric for a paper machine as described above, wherein the first connecting yarn (6) is engaged with one second yarn (9) at the connecting point (7, 8).

  In addition, the second yarn (9) engaged by the first binding yarn (6) and the first yarn (4) parallel to the second yarn (9) connect the pair of yarns that overlap each other to the joining point (7 8) and the pair of first yarns is adjacent to the first binding yarn (6) in the same way that the second yarn (9) is engaged by the first binding yarn (6). The woven fabric for a paper machine as described above, wherein the woven fabric is engaged by a base yarn (5).

  The first binding yarn (6) is separated from the adjacent first binding yarn (6) by one first basic yarn (5) or a plurality of first basic yarns extending in parallel to the yarn, and 2 The woven fabric for a paper machine as described above, wherein the number of the first basic yarns (5) extending in parallel between the adjacent first binding yarns (6) of the book is four at the maximum.

  Further, at least one pair (14, 15) composed of the first yarn and the second yarn (4, 9) arranged vertically is engaged by the first coupling yarn (6) at the coupling point (7, 8). The two first yarns and the second yarns (4, 9), which extend adjacent to the second yarn (9), and the first binding yarns move through the woven fabric layer (2, 3). It is a woven fabric for paper machines as described above, characterized by passing between the two.

  Further, the first binding yarn (6) passes under the first yarn (4) orthogonal to the first binding yarn between two adjacent binding points (7) in the extending portion, and passes through the first yarn ( 4) extending symmetrically with respect to the number of the first yarns (4), the number of the first yarns (4) extending in parallel at the joining point and matching the number of the first yarns not engaged by the first joining yarn (6). The woven fabric for a paper machine described above.

  The ratio of the number of first yarns (4) orthogonal to the first binding yarn (6) and the number of second yarns (9) parallel to the yarns is 1: 1, 2: 1, 3: 2, The woven fabric for a paper machine as described above, wherein the woven fabric is 1: 2 or 2: 3.

  The ratio between the sum of the number of first basic yarns (5) parallel to the first basic yarn (5) and the number of second yarns parallel to the first basic yarn (5) Is a woven fabric for a paper machine as described above, wherein the ratio is 1: 1, 2: 1, or 3: 2.

  In addition to the first binding thread (6), the second binding thread is included in the second thread, the second binding thread is orthogonal to the first binding thread (6), and the second binding thread is The woven fabric for a paper machine as described above, wherein the woven fabric for paper machine is engaged with at least one first yarn orthogonal to the second binding yarn at a joining point.

  The second woven fabric layer (3) is a woven fabric for a paper machine as described above, characterized in that the second woven fabric layer (3) is woven on at least 4 shafts, at most 24 shafts, especially 6 or 8 shafts.

  The yarn (4, 9) extending in the running direction of the paper machine woven fabric is polyethylene terephthalate, polyethylene naphthalate, or a mixture or copolymer thereof, and / or a yarn (5, 6) perpendicular to the running direction. 10) is a material suitable for use in polyethylene terephthalate, polyamide, a mixture or copolymer thereof, a blend of these with polyurethane, or a paper machine, It is a machine woven fabric.

Further , in the woven fabric for a paper machine described above , the yarn (4 , 5 , 6 , 9 , 10) has a circular shape, an elliptical shape, a rectangular shape, or a cross-sectional shape having a different external shape.

The yarns (4 , 5 , 6 , 9 , 10) are produced by using or knitting at least two monofilaments or multifilaments and / or in particular urethane or acrylic materials or nano The woven fabric for paper machine as described above, wherein the woven fabric for paper machine is coated with particles.

1, 21, 31, 41 Paper machine woven fabric 2 First woven fabric layer 3 Second woven fabric layer 4 First yarn (first woven fabric layer constituting yarn, first cross yarn)
5 1st yarn (1st woven fabric layer constituting yarn, 1st basic yarn)
6 First yarn (first woven fabric layer constituting yarn, first binding yarn)
7, 8 Joining point 9 Second yarn (second woven fabric layer constituting yarn, second warp yarn)
10 Second yarn (second woven fabric layer constituting yarn, second weft)

Claims (15)

A woven fabric for a paper machine to be mounted on a paper machine, in particular a forming fabric, having a first woven fabric layer and a second woven fabric layer,
The first woven fabric layer is a layer that becomes a paper side when mounted on a paper machine, and a plurality of first woven fabric layer constituting yarns are interwoven to form a repeating unit of the first woven fabric that repeats. And
The second woven fabric layer is a layer on the paper machine side when being attached to the paper machine, and a plurality of second woven fabric layer constituting yarns are interwoven with each other and repeat the second woven fabric repeating unit. Forming,
The first woven fabric layer and the second woven fabric layer are bonded to each other by a first binding yarn, and the first binding yarn is included in the first woven fabric layer constituting yarn,
The first woven fabric layer constituting yarn includes a first base yarn extending in the same direction as the first binding yarn, and a first cross yarn extending in a direction intersecting the first base yarn,
The first base yarn forms a plain weave with the first cross yarn, the first binding yarn forms a plain weave partially with the first cross yarn;
The first binding yarn is a second woven fabric layer-constituting yarn and is engaged with at least one of the second cross yarns intersecting the first binding yarn at a binding point outside the second woven fabric layer. Transition from the first woven fabric layer to the second woven fabric layer and vice versa,
The first cross yarn is not engaged with the first joint yarn in a region near the joint point, and the number of the first cross yarns not engaged is the number of the second cross yarns engaged at the joint point. A woven fabric for a paper machine that is at least two more than the number,
A woven fabric for paper machine, wherein only one first binding yarn is arranged between two adjacent first basic yarns.   2. The paper machine weaving according to claim 1, wherein the first binding yarn is directly adjacent to two adjacent first base yarns, and there is one first base yarn on both sides of the first binding yarn. cloth.   The first binding yarn extends as a first binding weft in a direction perpendicular to the running direction of the paper machine woven fabric, and engages with at least one second warp at the connection point, or the first binding yarn is a paper machine. The woven fabric for a paper machine according to claim 1 or 2, wherein the woven fabric for a paper machine extends in the running direction of the woven fabric as a first joining warp and engages with at least one second weft at the joining point.   The woven fabric for a paper machine according to any one of claims 1 to 3, wherein the first binding yarn engages with one second woven fabric layer-constituting yarn at the connecting point.   The second woven fabric layer constituting yarn engaged by the first binding yarn and the first woven fabric layer constituting yarn parallel to the second woven fabric layer constituting yarn form a pair of yarns that overlap each other at the joining point. The one first woven fabric layer constituting yarn constituting the pair is engaged by a first base yarn adjacent to the first binding yarn. Woven fabric for paper machines.   The first binding yarn is separated from the adjacent first binding yarns by one first basic yarn or a plurality of first basic yarns extending parallel to the yarn, and between the two adjacent first binding yarns. The woven fabric for a paper machine according to any one of claims 1 to 5, wherein the number of first basic yarns extending in parallel with each other is 4 at the maximum.   At least one pair of the first woven fabric layer constituting yarn and the second woven fabric layer constituting yarn arranged vertically is adjacent to the second woven fabric layer constituting yarn engaged by the first binding yarn at the joining point. Of the two first woven fabric layer constituting yarns and the second woven fabric layer constituting yarns when the first binding yarn moves between the first woven fabric layer and the second woven fabric layer. The woven fabric for a paper machine according to any one of claims 1 to 6, wherein the woven fabric for a paper machine is passed between.   The first binding yarn passes under the first woven fabric layer constituting yarn orthogonal to the first linking yarn between two adjacent joining points in the extending portion, and is symmetrical with respect to the first woven fabric layer constituting yarn. The number of the first woven fabric layer constituting yarns extends, and the number of the first woven fabric layer constituting yarns extends in parallel at the joining point and coincides with the number of the first woven fabric layer constituting yarns not engaged by the first joining yarn. Item 8. A paper machine woven fabric according to any one of Items 1 to 7.   The ratio between the number of first cross yarns and the number of second woven fabric layer constituting yarns parallel to the yarns is 1: 1, 2: 1, 3: 2, 1: 2, or 2: 3. A woven fabric for a paper machine according to any one of claims 1 to 8, which is characterized by the following.   The ratio of the sum of the number of first base yarns parallel to the first base yarns and the first base yarns to the number of second woven fabric layer constituent yarns parallel to the first base yarns is 1: 1, 2: 1 Or a 3: 2 paper machine woven fabric according to any one of claims 1 to 9, wherein   In addition to the first binding yarn, the second binding yarn included in the second woven fabric layer-constituting yarn has the second binding yarn orthogonal to the first binding yarn, and the second binding yarn has a bonding point. The woven fabric for a paper machine according to any one of claims 1 to 10, wherein the woven fabric for a paper machine is engaged with at least one first woven fabric layer constituting yarn orthogonal to the second binding yarn.   The woven fabric for a paper machine according to any one of claims 1 to 11, wherein the second woven fabric layer is woven into at least 4 shafts and at most 24 shafts.   The yarn extending in the running direction of the paper machine woven fabric is polyethylene terephthalate, polyethylene naphthalate, or a mixture or copolymer thereof, and / or the yarn perpendicular to the running direction is polyethylene terephthalate, polyamide, or these The woven fabric for a paper machine according to any one of claims 1 to 12, which is a mixture or a copolymer, or a blend of these and a polyurethane.   The woven fabric for a paper machine according to any one of claims 1 to 13, wherein the yarn has a circular shape, an elliptical shape, a rectangular shape, or a cross-sectional shape having different external shapes.   The yarn is made by knitting or knitting at least two monofilaments or multifilaments and / or coated with urethane or acrylic material or with nanoparticles The woven fabric for a paper machine according to any one of claims 1 to 14, wherein the woven fabric is for a paper machine.

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