JP2008518116A - Seamed press felt, press felt, and method for producing base fabric - Google Patents

Abstract

The present invention relates to the manufacture of a seamed press felt, a seamed press felt and a base fabric. The base fabric of the laminated structure includes two or more superimposed fabric layers (7a, 7b). The base fabric woven as an endless fabric has connecting ends (4, 5) in which continuous wefts (8) form seam loops (10). The connecting ends (4, 5) further comprise connecting portions (12a, 12b), at least two overlapping fabric layers being bonded together with at least one cross machine direction (CMD) connecting warp 13.
[Selection] Figure 2

Description

  The present invention relates to a method for producing a seamed press felt. This method involves weaving a laminated base fabric on a single weaving machine, the fabric having at least a first fabric layer and a second fabric layer superimposed, the fabric layers including warp yarns and weft yarns, respectively. Weaving the base fabric with continuous weft yarns running back and forth in the fabric, at least some of which form seam loops at the connecting end of the base fabric, the base fabric inserting seam loops at the connecting end and seams Can be arranged to form a closed loop by inserting at least one seam yarn through a seam channel formed by the loop; and includes fastening at least one batt fiber layer to at least one surface of the base fabric after weaving To do.

  The invention further relates to a press felt. This press felt has at least a superimposed first and second fabric layer, each having a separate yarn system including warp and weft yarns; and within the fabric at its base fabric. The running weft is continuous, at least some of which are arranged to form a seam loop, the first series of ends and the second end of the base fabric having a plurality of seam loops; A seam region comprising a seam channel, wherein the base fabric may be arranged to form a closed loop by insertion of at least one seam yarn through the seam channel formed by the seam loop; and tied to at least one surface of the base fabric And at least one batt fiber layer.

  The invention further relates to a base fabric for press felt. The base fabric includes at least a first fabric layer and a second fabric layer, each of which has an independent yarn system that includes a warp yarn and a weft yarn, respectively, and the weft running through the base fabric is continuous. And at least some of which are arranged to form seam loops, wherein the first and second connecting ends of the base fabric comprise a plurality of seam loops.

  A press felt is used in the press section of a paper machine to absorb water from the web to be dried. Depending on the structure of the press part, the press felt can be placed on one or both of the webs to be dried. Press felt refers to something that carries water removed by pressurization and prevents it from returning to the web. To achieve pressurization, the paper web is transferred over the felt between a gap or nip and two rolls. The felt structure is such that water should be easily drawn from the web into the felt at the nip. The press felt includes, for example, a base fabric that provides the necessary water space within the felt. In order to smooth the surface of the felt, bat fibers are attached at least on the side of the base fabric facing the web. The base fabric is typically woven on a loom using a flat or endless weave. Endless weaving can be done as a horseshoe weaving, also known as round weaving or U-type endless weaving. During further weaving, a press felt in the form of a closed loop is produced by providing a seam loop at the end of the press felt and bringing together the connecting ends. This type of seamed press is usually easier and quicker to install in a paper machine than a press felt manufactured as a closed loop.

  A typical problem associated with some prior art of laminated felts with seams is that the warp yarns closest to the seam area tend to flow from that position, for example, slip on or even below the seam loop, This is to complicate the joining.

DESCRIPTION OF THE INVENTION It is an object of the present invention to provide a new and improved process for producing seamed press felt and a new and improved press felt and press felt base fabric.

  The method of the present invention involves weaving a connecting portion to a connecting end of a base fabric, wherein the connecting end joins at least two superimposed fabric layers to at least one single base structure only at the connecting end. Features.

  The press felt of the present invention comprises a connecting portion arranged to join at least two overlapping fabric layers at the connecting end of the base fabric, and the connecting portions are separated in relation to the independent yarn system of the fabric layer. It is characterized in that it includes both weft yarns that form a different weave pattern from that of the cross-machined yarns that are yarns and the independent yarn system of fabric layers.

  The press felt base fabric of the present invention comprises a connecting portion arranged so that the connecting end of the base fabric is joined to at least two overlapping fabric layers, and the independent yarn system of the connecting layer being a fabric layer. Including both weft yarns which form a weave pattern different from that of the yarns separated in relation to the cross-machine direction and the independent yarn system of the fabric layer.

  The present invention is based on the idea of applying an endless weaving technique on a weaving machine for weaving laminated base fabrics to the connecting end of a seam loop formed by wefts. Furthermore, during the weaving process, the connecting ends are joined with at least two superimposed layers of the base fabric. Two or more cross machine direction connecting warps can be woven into the connecting portion, the warps joining the wefts of at least two fabric layers. Accordingly, the connected warp runs differently than the warp of the individual fabric layers.

  An advantage of the present invention is that the single base portion at the connecting end of the felt stabilizes the seam area. This makes it possible to better support the seam loop and thus can better rest in the upper position, facilitating the formation of seam loop channels. A further advantage is that the cross-machine direction yarn is not flowed over the seam loop since the connecting warp ties the structure. Compared to some known laminated structures, a press felt provided with such a connecting end is easier and faster to stitch together at the press. A further advantage is that the connecting warp can improve the adhesion of the bat fibers to the seam area.

  As an advantage of the present invention, it is contemplated that the laminated structure may have a relatively large water holding capacity. Other advantages of the laminated structure are good resistance to compression and greater flexibility compared to a single substructure.

  The aspect of the present invention is based on the idea that the connecting portion joins all the laminated fabric layers to a single foundation structure at the connecting end of the base fabric.

  Aspects of the invention are based on the idea that the base fabric comprises at least 4 superimposed fabric layers and the connecting portion brings together 2 layers. The connecting part can join the two outermost layers, i.e. facing the web to be dried, or alternatively the two innermost layers together.

  Aspects of the invention are based on the idea that the base fabric has three overlapping fabric layers and the connecting portion joins the two outermost layers together.

  The aspect of the present invention is based on the idea that the connecting portion includes not only the joining warp but also the warp yarn belonging to the independent yarn system of the fabric layers to be connected.

  Aspects of the present invention are based on the idea that the connecting portion includes only the weft yarn and the connecting warp without the cross machine direction yarn.

  Aspects of the present invention are based on the idea that the base fabric is woven using a horseshoe weave.

  Aspects of the present invention are based on the idea that the base fabric is woven using an endless weave.

  An aspect of the present invention is that the base fabric has at least 4 independent overlapping fabric layers and that the fabric layers forming seam loops between them at the connecting ends are joined together, the connecting ends being a plurality of overlapping layers. It is based on the idea of having a combined connecting part.

  The aspect of the present invention is based on the idea that the length of one connecting portion in the machine direction is 0.5 to 50 mm, particularly preferably 0.5 to 20 mm. The number and size of the connecting warps determine the length of the connecting portion.

  The aspect of the present invention is based on the idea that the connecting portion has at least two connecting warps. Depending on the shaft structure used for the connected warp, the number of connected warps may be 2, 4, 6, or a number that is a multiple of these.

  The aspect of the present invention is based on the idea that the connecting portion has at least four connecting warps.

  Embodiments of the present invention are based on the idea that the connected warp has a 2, 4-, 6- or 8-shaft run.

  The embodiment of the present invention is based on the idea that the yarn used as the connecting warp is substantially similar to the warp running on the independent fabric layer. Accordingly, the warp yarns of the connecting portion are different from those of the fabric layer only in the weave pattern.

  In an embodiment of the present invention, the yarn used as the connecting warp is different from that of the fabric layer in one of the following properties: structure, cross-sectional shape, material size.

  Aspects of the present invention are based on the idea that the yarn density of the connected warp, i.e. the distance between the connected wefts, is substantially the same as the yarn density of the warp in an independent yarn system of the fabric layer.

  The aspect of the present invention is based on the idea that the yarn density of the connected weft is different from that of the warp yarn belonging to the yarn system of the independent fabric layer. In the connected portion, the yarn density of the connected warp can be greater than the warp density in the fabric layer.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic perspective view of a press felt according to the present invention.

  FIG. 2 is a schematic cross-sectional view in the machine direction for weaving the base fabric of the present invention by horseshoe weaving.

  FIG. 3 is a schematic cross-sectional view in the machine direction for weaving the second base fabric of the present invention by endless weaving.

  FIG. 4 is a schematic cross-sectional view in the machine direction of the press felt of the present invention.

  FIG. 5 is a schematic cross-sectional view in the machine direction for weaving the third basic fabric of the present invention by horseshoe weaving.

  FIG. 6 is a schematic cross-sectional view in the machine direction of a base fabric composed of two single-layer laminates (1 + 1) and their connecting ends.

  FIG. 7 is a schematic cross-sectional view in the machine direction of a basic fabric composed of three single-layer laminates (1 + 1 + 1) and their connecting ends.

  FIG. 8 is a schematic cross-sectional view in the machine direction of another basic fabric composed of three single-layer laminates (1 + 1 + 1) and their connecting ends.

  FIG. 9 is a schematic cross-sectional view in the machine direction of a basic fabric composed of four single-layered laminates (1 + 1 + 1 + 1) and their connecting ends.

  FIG. 10 is a schematic cross-sectional view in the machine direction for weaving a base fabric according to the invention having four foundation layers (1 + 1 + 1 + 1) with a horseshoe weave.

  FIG. 11 is a schematic cross-sectional view in the machine direction for weaving a 3-base (1 + 1 + 2) foundation fabric of the present invention with a horseshoe weave.

  FIG. 12 is a schematic machine direction view traversed at the connecting portion.

  FIG. 13 is a schematic machine direction view traversed at the second connecting portion.

  The invention shown in the figure for clarity has been simplified. Like parts are indicated by like reference numerals.

FIG. 1 shows a press felt in the form of a closed loop, the felt comprising a laminated or multilayer base fabric 1 and a bat fiber layer applied to at least one surface of the base fabric 1. Include. The batt fiber layer 2 can be applied to the surface of the base fabric 1 facing the web to be dried, or can be applied to both surfaces of the base fabric. Furthermore, in the cross machine direction CMD of the paper machine, the base fabric 1 shows a seam area 3 that joins the first and second cross machine direction connecting ends 4 and 5 of the base fabric 1 together. The seam region 3 has a predetermined width L in the machine direction MD of the press felt. Seam region 3 includes a seam 6 with seam loops and seam yarns. The structure of the seam 6 is shown, for example, in FIG.

  FIG. 2 shows an example of weaving the press felt base fabric of the present invention. The figure has been greatly simplified for clarity. The laminated base fabric 1 can include two or more superimposed fabric layers, each with a separate yarn system. The illustrated basic fabric 1 has two independent fabric layers 7, namely a first fabric layer 7a and a second fabric layer 7b. In horseshoe weaving, there can be four superimposed fabric layers 7 on the loom. In FIG. 2, these layers are in the order 7a, 7b, 7b, 7a from top to bottom. Thus, the base fabric 1 can include a plurality of fabric layers 7, e.g. The yarn system of the fabric layer 7 has a plurality of weft yarns 8 running in the machine direction MD and a plurality of warp yarns 9 running in the cross machine direction CMD, the yarns 8, 9 being in a known weave like a 2-axis weave. Join together. FIG. 2 illustrates what is known as a horseshoe weave, a special type of endless weave. The endless weave structure is known as double weaving and can take advantage of the loom width. The weft 8 runs continuously and forms a seam loop 10 at the end of the fabric. There is no warp yarn 9 in the seam loop 10 portion. An end yarn 11 is provided at the end to facilitate the formation of the seam loop 10. The connecting ends 4 and 5 with the seam loop 10 are thereby formed in the base fabric during weaving. Thus, the press felt can be closed in a closed loop form at the press section of the paper machine.

  In accordance with the inventive idea, the connecting part 12 is then woven at both connecting ends 4 and 5 of the base fabric 1. The connecting portion 12 weaves simultaneously with the rest of the base fabric 1 structure. For clarity, the connecting portion 12 shown in FIGS. 2-5 is greatly simplified. The connecting portion 12 overlaps and adheres the first fabric layer 7 a and the second fabric layer 7 b to each other in the region of the connecting ends 4 and 5. In the connecting portions 12a and 12b, the base fabric 1 has a single base structure, but in other areas the structure is multi-base. The connecting portion 12 includes two or more connecting warps 13 in the cross machine direction CMD, and the warps can be combined with the weft yarns 8 forming the seam loop 10 in both fabric layers 7a, 7b. A two-layer weave that can attach together some of the prior art fabric layers 7a and 7b sufficiently firmly can be used between the connecting warp 13 and the weft yarn 8. The fabric between the connecting warp 13 and the weft yarn 8 can be composed of, for example, four or more shafts. Accordingly, the connecting weft yarns 13 in the connecting portions 12a and 12b connect both the weft yarn of the first fabric layer 7a and the weft yarn 8 of the second fabric layer 7b, but the warp yarn 9 only travels in the fabric layer 7. . The fabric on the connecting warp 13 is always different from that on the warp 9 of the individual fabric layer 7.

  The yarn used for the connecting warp 13 can be similar to or different from the warp yarns 9 of the individual fabric layers. The choice of the connecting warp 13 can also affect the permeability at the connecting portion 12 and thereby the seam area 3, bat fiber deposits and seam area thickness. Furthermore, it is possible to select other warp yarns 9 in the seam area 3 and give the seam area 3 the desired properties.

  The number of connected warps 13 can be selected as necessary. It is preferable to use 2 to 8 connected warp yarns, with 4 or more being particularly preferred.

  In the press felt according to the invention, the seam region 3 comprises two connecting ends with a connecting part and a seam loop. In the seam region 3, single layer structures facing each other are connected together by a seam loop 10.

  FIG. 3 shows an alternative for weaving the basic fabric 1 according to the invention. Instead of a horseshoe weave, the base fabric 1 can be woven using a normal endless weave. In the case shown, there are two superposed single layer fabric layers 7a and 7b, both of which have independent yarn systems. The weft yarn 8 travels in a continuous manner while forming a seam loop 10 on the opposite side of the opposed connecting ends 4 and 5. At the same time, the connecting portions 12a and 12b are woven into the connecting ends 4 and 5 to attach the fabric layers 7a and 7b together. Similar to the horseshoe weave of FIG. 2, the connecting portion 12 can be provided with two or more cross-machine direction CMD binding warps 13 running between the weft yarns 8 of the fabric layer 7 to be attached together. When the weaving of the base fabric 1 is complete, the fabric is finished and the required batt fiber layer is applied to it, for example by sewing. The press felt can be formed into an endless structure by returning the connecting ends 4, 5 to each other in the direction A shown in the figure, whereby the seam loop 10 engages and forms a seam channel through which the seam yarn 14 etc. Can be inserted as shown in FIG. For the sake of clarity, FIG. 4 does not show the warp yarn 9. Further, in FIG. 4, the bat fiber layer 2 is attached to both the press felt surface and the felt back surface facing the web. The dots and dashes indicate the bat fiber layer 2 in the figure.

  FIG. 5 shows another solution that is very simplified. A horseshoe weave is used to produce four overlapping fabric layers 7a-7d, with two overlapping sets of seam loops 10a and 10b at both the first and second connecting ends 4 and 5 of the fabric. Yes. Alternatively, the loop set can be offset somewhat in the machine direction MD. Furthermore, the four overlapping fabric layers 7a-7d can be joined together into a single substructure at the connecting end during weaving to form the connecting portion 12a. In other parts of the base fabric 1, the structure includes four superimposed bases. For clarity, the warp yarn is not shown in FIG.

  FIG. 5 further shows an alternative to bringing the individual fabric layers 7 together. The connecting portions 12b and 12b can be brought together with a fabric layer that forms a seam loop 10 between them at the connecting end. The connecting portion 12b can be with the fabric layers 7d and 7c, and the connecting portion 12c can be with the fabric layers 7b and 7a. In this case, the connecting end portion 5 can be provided with two or more overlapping connecting portions 12b and 12c. As yet another alternative, the connecting portion 12 brings the fabric layers 7b and 7c together at the connecting ends 4 and 5. The connecting end structure of the type shown in FIG. 5 can also be manufactured as a flat fabric.

  FIG. 6 shows the connecting end 4 of the basic fabric 1 of the present invention. The base fabric 1 can be a single layer structure and includes two overlapping fabric layers 7a and 7b having a 2-shaft weave structure. Furthermore, the connecting end 4 is provided with a seam loop 10 formed by warp yarns 8. This type of structure can be woven as described, for example, with reference to FIGS. The connecting end 4 is woven simultaneously with the base fabric 1 and has a machine direction length K which can be, for example, 0.5 to 20 mm. The length of the connecting portion 12 can be influenced by the selection of the desired number of connecting warps 13. In practice, the shaft structure of the fabric used for the connecting warp 13 and the number of multiples of connecting yarns 13 selected for each particular connecting part 12 influence the length of the connecting part 12. Further, the connecting portion 12 in the illustrated base fabric 1 includes only the weft yarn 8 and the connecting warp 13 that are joined together and attaches the fabric layers 7a and 7b to each other. The connecting part 12 of the base fabric 1 has a single base structure, but a 2-base structure is used in the other parts.

  FIG. 7 shows a portion of the base fabric of the present invention having three superimposed single layer fabric layers 7a-7c. The weft yarns 8 of the outermost layers 7 a and 7 c form the seam loop 10 at the connecting end 4, but the weft yarn 8 a of the central fabric layer 7 b does not participate in the formation of the seam loop 10. The connecting part 12 does not have the warp yarns 9 belonging to the independent yarn system of the fabric layers 7a-7c, but only the connecting warp yarns 13 which are joined together with the weft yarns 8 forming the seam loop 10.

  FIG. 8 shows a base fabric 1 with a connecting end 4 in the connecting portion 12 where the warp 13 is combined with three superposed fabric layers 7a-7c into a single base structure. In this case, the connecting part 12 has not only the connecting warp 13 but also the warp yarn 9 belonging to the independent yarn system of the central fabric layer 7b. The yarns 8 a and 9 of the central fabric layer 7 b can be bonded together with the connecting warp 13. Alternatively, the yarns 8 a and 9 of the central fabric layer 7 b are not bonded to the connecting warp 13 at all.

  FIG. 9 shows a portion of the base fabric 1 that includes four superimposed single layer fabric layers 7a-7d in an independent yarn system. The weft yarns 8 in the outermost fabric layers 7a-7d form a seam loop 10 at the connecting end 4, but the independent yarn system of the inner fabric layers 7b and 7c does not reach the connecting end 12 at all. Therefore, in the connecting part of the solution shown in the figure, the connecting part consists only of connecting warps 13 that intersect with the wefts 8 forming the seam loop 10.

  FIG. 10 shows an alternative to weaving the connecting part 12 on a base fabric comprising four superposed single layer fabric layers 7a-7d, ie having a laminated structure 1 + 1 + 1 + 1. The weft yarns 8a of the inner fabric layers 7b and 7c extend all the way to the connecting portion 12, and the connecting warp yarns 13 of the connecting portion 12 are arranged across the weft yarns 8a of the independent fabric layers 7b and 7c. In this embodiment, the weft yarn 8 forming the seam loop 10 is not tied to the connecting warp 13.

  The embodiment shown in FIG. 11 relates to the weaving of the base fabric 1 having a laminated structure 1 + 1 + 2, ie comprising two single-layer fabric layers 7a and 7b and one two-layer fabric layer 7c. In this embodiment, the weft yarn of the uppermost fabric layer 7 a and the weft yarn of the lower layer of the two-layer fabric layer 7 c form a seam loop 10. In the connecting portion 12, the connecting warp yarns 13 are connected to the single layer structure together with the single layer fabric layers 7 a and 7 b. The connecting warp 13 is tied to the weft yarns 8 and 8a belonging to the fabric layers 7a and 7b.

  FIG. 12 illustrates the basic fabric in a cross section showing the connecting portion 12 from the machine direction MD. The base fabric includes two superposed single layer fabric layers 7 a and 7 b, and the yarn system includes a weft yarn 8 and a warp yarn 9. The fabric can be biaxial, for example. In the embodiment of FIG. 12, the warp yarn 9 belonging to the independent yarn system of the fabric layers 7 a and 7 b extends to the connecting portion 12. Furthermore, the connecting part 12 is provided with connecting warps 13 traversing between the wefts 8 of the fabric layers 7a, 7b according to a known weaving pattern. As shown in FIG. 12, the base fabric 12 of the connecting portion 12 is a single base structure.

  FIG. 13 shows the crossing of another connecting part 12 in the machine direction MD. The basic fabric 1 does not include the warp yarns 9 of the independent yarn system in which the connecting portions 12 are the fabric layers 7a and 7b, but only the connecting warp yarns 13 and the weft yarns 8 that are joined together.

  The press felt of the present invention can be woven using different weaves and yarns. The yarn can be, for example, a monofilament, a twisted monofilament, or a multifilament yarn. Furthermore, the yarn may have a circular, elliptical or substantially rectangular cross section. The yarn can be made of synthetic material. The material typically used is plastic, and polyamide (PA) is one example that can be pointed out.

  The drawings and the related descriptions are only for illustrating the idea of the present invention. The details of the invention may vary within the scope of the claims.

The figure which shows the schematic perspective view of the press felt of this invention. The figure which shows the general | schematic machine direction sectional drawing which weaves the basic fabric of this invention by a horseshoe weave. The figure which shows the general | schematic machine direction sectional drawing which weaves the 2nd basic fabric of this invention by an endless weave. The figure which shows schematic machine direction sectional drawing of the press felt of this invention. The figure which shows schematic machine direction sectional drawing of the 3rd basic fabric of this invention by a horseshoe weave. The figure which shows the schematic machine direction sectional drawing of the basic fabric which consists of two single layer lamination | stacking (1 + 1) and its connection end part. The figure which shows schematic machine direction sectional drawing of the basic fabric which consists of three single layer lamination | stacking (1 + 1 + 1) and its connection edge part. The figure which shows schematic machine direction sectional drawing of the other basic fabric which consists of three single layer lamination | stacking (1 + 1 + 1) and its connection edge part. The figure which shows the general | schematic machine direction sectional drawing of the basic fabric which consists of 4 single layer lamination | stacking (1 + 1 + 1 + 1) and its connection edge part. The figure which shows the schematic machine direction sectional drawing which weaves the base fabric of this invention which has four base layers (1 + 1 + 1 + 1) by a horseshoe weave. FIG. 2 shows a schematic cross-sectional view in the machine direction for weaving a 3-base (1 + 1 + 2) base fabric of the invention by horseshoe weaving. The figure which shows the general | schematic machine direction figure traversed in the connection part. The figure which shows the general | schematic machine direction figure traversed in the 2nd connection part.

Claims (12)

The laminated base fabric (1) is woven with one loom, and the fabric has at least a first fabric layer (7a) and a second fabric layer (7b) superimposed, the fabric layers comprising weft yarn (8) and Having an independent yarn system including a warp yarn (9);
Weaving the base fabric (1) with continuous weft yarns (8) running back and forth in the fabric (1), at least some of which form seam loops (10) at the connecting ends (4, 5) of the base fabric, The base fabric (1) is inserted by inserting a seam loop (10) at the connecting end (4, 5) and by inserting at least one seam yarn through a seam channel formed by the seam loop (10). Can be arranged to form a closed loop; and a method comprising fastening at least one batt fiber layer (2) to at least one surface of the base fabric (1) after weaving;
The connecting portions (12a, 12b, 12c) are woven into the connecting ends (4, 5) of the base fabric (1), and the connecting portions are at least two overlapping fabric layers (7a, 7b, 7c only at the connecting ends) ) Together in at least one single substructure. A method for producing a seamed press felt. Oriented into warp yarns in the connecting portion (12a, 12b, 12c) that separate from the independent yarn system of the fabric layer and together with the weft yarn form a weave pattern different from that of the independent yarn system of the fabric layer 2. Method according to claim 1, characterized in that the connecting yarns (13) are woven. 3. A method according to claim 2, characterized in that 2 to 8 connected warps are woven into the connected part. The method of claim 1, wherein the connecting portion is woven to a machine direction (MD) length of 0.5 to 20 mm. Method according to any of the preceding claims, characterized in that all the woven fabric layers (7a-7d) are joined together at the connecting part (12) to provide the connecting part (12) in a single substructure. . The base woven fabric (1) has at least a first woven fabric layer (7a) and a second woven fabric layer (7b) which are independent yarns comprising a weft yarn (8) and a warp yarn (9), respectively. And a weft yarn (8) running in the fabric in the base fabric (1) is continuous, at least some of which is arranged to form a seam loop (10) to form the base fabric (1) The first connecting end (4) and the second connecting end (5) of the plurality of seam loops;
A seam region (3) comprising a seam channel formed by the seam loop (10), the base fabric (1) forming a closed loop by insertion of at least one seam yarn through the seam channel formed by the seam loop (10) A press felt comprising at least one batt fiber layer (2) bonded to at least one surface of the base fabric (1);
The connecting ends (4, 5) of the base fabric (1) have connecting portions (12a, 12b, 12c) arranged to be joined together with at least two overlapping fabric layers (7a, 7b, 7c, 7d). And the connecting portion (12a, 12b, 12c) is a yarn that is separate from the independent yarn system of the fabric layer and, together with the weft, forms a fabric pattern that is different from that of the independent yarn system of the fabric layer. A press felt comprising a cross machine direction (CMD) connecting yarn (13). 7. Press felt according to claim 6, characterized in that the connecting part (12) has 2 to 8 connecting warps (13). The press felt according to claim 6, wherein the length of the connecting portion (12) in the machine direction (MD) is 0.5 to 20 mm. 7. All the textile layers (7a to 7d) of the base fabric (1) at the connecting part (12) are joined together in a single base structure by at least two connecting warps (13). The press felt in any one of -8. 10. Press felt according to any of claims 6 to 9, characterized in that the connecting part (12) is a connected warp yarn (13) and a warp yarn (9) both belonging to the independent yarn system of the fabric layer (7). . The connecting part (12) is manufactured without the warp yarn (9) belonging to the independent yarn system of the fabric layer (7), so that the connecting part (12) has only the connecting warp (13) and the weft yarn (8). The press felt according to any one of claims 6 to 9. Including at least a first fabric layer (7a) and a second fabric layer (7b), the fabric layer having an independent yarn system comprising a weft yarn (8) and a warp yarn (9), respectively, and a base fabric (1) The weft yarns (8) running on the base fabric are continuous and at least some of which are arranged to form a seam loop (10) so that the first connecting end (4) and the second connecting end (5 ) With multiple seam loops,
The connecting end (4, 5) of the base fabric (1) comprises a connecting part (12a, 12b, 12c) arranged to bond with at least two overlapping fabric layers (7a, 7b, 7c, 7d). And the connecting portions (12a, 12b, 12c) are yarns that are separate from the independent yarns of the fabric layer and form a fabric pattern with the weft yarns that differs from that of the independent yarn system of the fabric layer ( CMD) Base fabric for press felt, characterized in that it comprises connecting yarns (13).

Images