JP2007277741A - Felt for paper making and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save production manpower by bringing conjugation work of hem portions of woven fabrics to be simple without generating difference in physical properties between a ground portion and the conjugated portion in which the hem portions of woven fabrics with the hems to be ground fabrics are mutually conjugated. <P>SOLUTION: In a felt in which a nonwoven fiber layer 2 is integrally laminated with the ground fabric 1 by needling and the hem portions 11a, 11b of the woven fabric 11 with the hems which is the ground fabric are mutually conjugated, the hem portion of the woven fabric to be the ground fabric is mutually overlapped with the hem portion of the counterpart, non-weft yarn portions 15, 17 made by drawing out weft yarns 4 and weft-having portions 16, 18 which is the same with the ground portion are installed and the non-weft yarn portion 15 and the weft-having portion 16 on the hem portion 11a in one side is brought to mutually overlap with each of the weft yarn-having portion 18 and the non-weft yarn portion 17 in the other hem portion 11b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a felt for papermaking in which a nonwoven fabric layer is laminated and integrated on a base fabric by needling, and ends of the woven fabric with ends that are the base fabric are joined to each other, and a method for manufacturing the same. .

  A so-called seam felt is known in which, in order to improve workability into a paper machine, a felt with end ends is drawn into a felt run and both ends thereof are joined to each other to be endless.

In this type of felt with seam, both ends are joined by passing the core wire through a common hole formed by meshing loops formed at both ends in the length direction by folding back the warp constituting the base fabric. In manufacturing, the weft on the paper machine is used as a warp (warp warp) on the loom, and the warp on the paper machine is woven as a driven thread on the loom to form loops at both ends of the base fabric. In addition, a method is known in which a loop is formed by folding back a warp yarn at folded portions formed at both ends by folding a woven fabric with ends (see Patent Documents 1 and 2).
JP-A-1-306696 Japanese Patent No. 2838547

  However, since the felt with a seam by the folding method can use a woven cloth with ends, it can be manufactured at a low cost by using a small or high-speed loom, and the woven cloth is cut into an appropriate size. However, it is necessary to join the ends of the woven fabric to each other, and when joining these ends, the fabrics of various lengths can be easily manufactured. In addition to ensuring sufficient strength against external force in the length direction, avoid physical properties such as thickness and water permeability (opening ratio) at joints that are significantly different from the ground, which can reduce papermaking quality. From this point of view, conventionally, joining by stitching is generally performed, but this involves a very troublesome task. The problem relating to the joining of the end portions of the woven fabric is the same when an endless base fabric is produced from an end woven fabric to form an endless felt.

  The present invention has been devised in order to solve such problems of the prior art, and the main purpose of the present invention is at the portion where the ends of the end woven fabric as the base fabric are joined together. There is provided a felt for papermaking and a method for manufacturing the same, which are configured so that no significant difference in physical properties occurs between the head and the end of the woven fabric and the number of manufacturing steps can be reduced. There is.

  In order to solve such a problem, in the present invention, as shown in claim 1, a non-woven fiber layer is laminated and integrated on a base fabric by needling. In the felt for papermaking in which the ends are joined to each other, a polymerization comprising a weft portion formed by pulling out the weft yarn at each end portion of the woven fabric serving as the base fabric, and a weft portion similar to the ground portion The weaving yarn portion and the weft yarn portion provided at one of a pair of end portions provided with regions are overlapped with the non-weft yarn portion and the weft yarn portion provided at the other, respectively. It was assumed that the ends of the fabric were superposed on each other.

  According to this, in the superposition region, the same weft yarn portion as the ground portion overlaps with the non-weft portion of the warp alone, but in this superposition region, the physical properties such as thickness and water permeability are equivalent to the warp in comparison with the ground portion. Only changes, and the difference in physical properties from the ground can be kept small. In addition, in the polymerization region, since the nonwoven fabric layer forming fibers are entangled with the warp and weft of the woven fabric, the ends of the woven fabric are firmly integrated with each other. In both cases, sufficient strength can be secured against external force in the length direction.

  In the papermaking felt, as shown in claim 2, a configuration in which a core wire is inserted into a common hole formed by alternately meshing the warp yarns of the non-weft yarn portions respectively provided at each end portion of the woven fabric, and can do. According to this, since the woven fabric portions overlapped with each other in the superposed region are joined to each other via the core wire, high dimensional stability can be obtained without shifting with respect to the external force in the length direction.

  In particular, in this configuration, since a high strength can be secured against external force in the length direction without entanglement of the fibers forming the nonwoven fiber layer, a needling process for laminating and integrating the nonwoven fiber layer on the base fabric In this case, the end of the woven fabric can be prevented from shifting when tension is applied to the base fabric so that the base fabric is moderately tensioned. It is also possible to perform stitching and welding for temporary fixing of the end of the woven fabric, but in this case, because the bonding dimensions are restricted due to the structural reasons of the bonding device such as a sewing machine and ultrasonic welder, Although it is difficult to bond uniformly over the entire width with a base fabric with a large width dimension, the configuration in which the core wire is inserted by engaging the warp as described above does not require a bonding device and facilitates bonding over the entire width. It can be carried out.

  In the papermaking felt, as shown in claim 3, the weft yarn portion may be provided on the end side of the woven fabric. According to this, with respect to the tensile force in the length direction, since the weft yarn portions in the overlapping region overlapping each other are hooked, the shift of the end portions is suppressed, so that high bonding strength can be obtained.

  In addition, it is good to perform welding, application | coating of an adhesive agent, etc. in order to prevent a tear from occurring at the end of the woven fabric.

  In the papermaking felt, as shown in a fourth aspect, the resin material may be impregnated or coated from the papermaking surface side. According to this, the generation | occurrence | production of the mark to the paper resulting from the structural difference of the junction part and base | substrate part of the base fabric of the form which piled up the superposition | polymerization area | region can be reduced. In the joint portion of the base fabric, a considerable mark reduction effect can be obtained by the non-woven fiber layer, but the mark can be further reduced by resin processing by impregnation / application of a resin material. Furthermore, by carrying out resin processing, it is possible to improve thickness retention, water squeezing, surface smoothness, durability and the like.

  In the papermaking felt, as shown in claim 5, each base fabric is formed by superposing a plurality of the woven fabrics, and each joint of the plurality of woven fabrics joined at the end portion by the superposition region. It can be set as the structure which the part shifted and arranged in the length direction. According to this, since the joint part of the woven fabric overlaps with the ground part of another woven fabric and is reinforced, high strength can be obtained.

  Further, in the present invention, as shown in claim 6, the non-woven fiber layer is laminated and integrated on the base fabric by needling, and the end portions of the end woven fabric to be the base fabric are joined to each other. In the manufacturing method of the felt for the present invention, at each end portion of the woven fabric that becomes the base fabric, a superposition region is formed which includes a weft portion formed by pulling out the weft and a weft portion similar to the ground portion, and is joined to each other. The ends of the woven fabric are overlapped with each other so that the weft yarn portion and the weft yarn portion provided on one of the pair of end portions overlap the non-weft yarn portion and the weft yarn portion provided on the other, respectively. Combined.

  According to this, in the superposition region, the same weft yarn part as the base part overlaps the non-weft part of the warp only, but in this superposition region, the physical properties such as thickness and water permeability are equivalent to the warp in comparison with the base part. Only changes, and the difference in physical properties from the ground can be kept small. In addition, in the polymerization region, the fibers of the nonwoven fabric layer are entangled with the warp and weft of the woven fabric so that the ends of the woven fabric are firmly integrated with each other. In both cases, it is possible to ensure sufficient strength against external force in the length direction.

  As described above, according to the present invention, the difference in physical properties between the portion where the ends of the woven fabric are joined to each other and the ground portion can be suppressed, and the joining operation of the ends of the woven fabric can be simplified. Man-hours can be reduced, and a great effect can be obtained in reducing manufacturing costs.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing an example of a felt according to the present invention. This felt is obtained by laminating and integrating a non-woven fiber layer 2 to a base fabric 1 by needling. The base fabric 1 is a two-layer fabric in which two woven fabrics in which wefts 4 are entangled with warps 3 are overlapped. Has a heavy structure.

  This felt is a felt with a seam. Joining loops 6 and 7 are formed on the base fabric 1 by folding back warps 3 at end portions 1a and 1b in the length direction. The felt is joined endlessly by inserting the core wire 8 into a common hole formed by alternately meshing so that the center holes of the two are aligned.

  FIG. 2 is a schematic cross-sectional view showing the manufacturing process of the felt shown in FIG. 1 step by step. FIG. 3 is a perspective view showing a main part of the woven fabric shown in FIG.

  As shown in FIG. 2, the base fabric 1 is manufactured by folding a single woven fabric 11 having a ring shape by overlapping the end portions 11 a and 11 b with each other, at both ends in the length direction. Joined loops 6 and 7 are formed by the respective bent portions 11c and 11d, and are divided into first to third portions 11e to 11g with the two bent portions 11c and 11d as a boundary.

  As shown in FIG. 3, the end portions 11a and 11b of the woven fabric 11 are joined so as to be overlapped with each other, and the wefts 4 are pulled out in the overlapping regions 13 and 14 of the end portions 11a and 11b. The non-weft yarn portions 15 and 17 and the weft yarn portions 16 and 18 similar to the ground portion are provided, and the non-weft yarn portion 15 and the weft yarn portion 16 on one end portion 11a side are provided on the other end portion 11b side. The weft yarn portion 18 and the non-weft yarn portion 17 overlap each other.

  The weft yarn portions 16 and 18 are provided from the end of the woven fabric 11 over a predetermined length in the length direction, and non-weft yarn portions 15 and 17 are provided on the inside thereof, and the length direction of the non-weft yarn portions 15 and 17 is provided. The length is set to a length corresponding to the overlapping weft portions 16 and 18. Further, as shown in FIG. 1, a welded portion 23 by an ultrasonic welder is formed at the end of the woven fabric 11 in order to prevent unraveling. In addition to welding, it is also possible to stop the release by applying an adhesive or the like.

  In producing the base fabric 1 from the woven fabric 11, first, as shown in FIG. 2 (A), the wefts 4 of the portions to be the bent portions 11c and 11d are required depending on the size of the joining loops 6 and 7. Pull out the number. Similarly, a required number of the wefts 4 corresponding to the non-weft yarn portions 15 and 17 are extracted according to the lengthwise dimension of the non-weft yarn portions 15 and 16.

  Next, as shown in FIG. 2 (B), the woven fabric 11 is folded, and as shown in FIG. 2 (C), the first to third portions 11e to 11g are overlapped with each other, and the end of the woven fabric 11 is also overlapped. The non-weft yarn portions 15 and 17 and the weft yarn portions 16 and 18 of the portions 11a and 11b are overlapped with each other. Then, as shown in FIG. 2 (D), by joining the joining loops 6 and 7 at both ends and passing the core wire 21, the folded woven fabric 11 is joined endlessly to stabilize the shape. Perform heat setting.

  In this way, the base fabric 1 is manufactured, and in the state where the joining loops 6 and 7 are engaged and joined endlessly through the core wire 21, the bat for forming the non-woven fiber layer 2 is overlapped to perform needling. The seam felt shown in FIG. 1 is obtained.

  The non-weft yarn portions 15 and 17 and the weft yarn portions 16 and 18 of the end portions 11a and 11b of the woven fabric 11 may be temporarily fixed by welding, stitching, or the like in order to prevent displacement during manufacture. .

  In the base fabric 1 configured in this way, as shown in FIG. 1, in the overlapping regions 13 and 14, the weft yarn portions 16 and 18 similar to the ground portion have the non-weft yarn portions 15 and 17 having only the warp 3. Although overlapped, the superposition regions 13 and 14 only have a thickness corresponding to the warp 3 as compared with the ground portion, and the difference in thickness from the ground portion can be suppressed to a small value. Furthermore, in the superposition | polymerization area | regions 13 and 14, water permeability falls only by the part corresponding to the warp 3 compared with a ground part, and the difference in water permeability with a ground part can be suppressed small.

  Further, in the base fabric 1, the forming fibers of the non-woven fiber layer 2 are entangled with the warp 3 and the weft 4 of the woven fabric 11 in the superposed regions 13 and 14, and the woven fabric portions 11e and 11g respectively provided with end portions 11a and 11b. They are firmly integrated with each other, and further integrated with the woven fabric portion 11f extending over the entire length in the length direction, and relative displacement between the woven fabric portions 11e and 11g is suppressed. Furthermore, since the weft yarn portions 16 and 18 are provided on the end side of the woven fabric 11, when the tensile force in the length direction acts, the weft yarn portions 16 and 18 of the overlapping regions 13 and 14 that overlap each other are caught and displaced. It is suppressed. For this reason, high intensity | strength can be acquired with respect to the external force of a length direction.

  FIG. 4 is a cross-sectional view showing a modified example of the felt shown in FIG. FIG. 5 is a perspective view showing a main part of the woven fabric shown in FIG.

  In this base fabric 41, two weft yarn portions 15 and two weft yarn portions 16 are alternately provided in the overlap region 13 on the end portion 11a side of the woven fabric 11, and similarly in the overlap region 14 on the end portion 11b side. The non-weft yarn portion 17 and the weft yarn portion 18 are alternately provided in two, and the non-weft yarn portion 15 and the weft yarn portion 16 on one end portion 11a side are connected to the weft yarn portion on the other end portion 11b side. 18 and the non-weft yarn portion 17 are superimposed on each other.

  In addition, it is also possible to provide three or more non-weft yarn portions 15 and 17 and three weft yarn portions 16 and 18 in each overlapping region 13 and 14 of the end portions 11a and 11b of the woven fabric 11, respectively.

  FIG. 6 is a cross-sectional view showing another example of the felt according to the present invention. In the base fabric 61, as in the example of FIG. 1, the weft yarn portions 15 and 17 and the weft yarn portions 16 and 18 are provided in the respective overlapping regions 13 and 14 of the end portions 11a and 11b of the woven fabric 11, The weft yarn portion 15 and the weft yarn portion 16 on the one end portion 11a side are overlapped with the weft yarn portion 18 and the no weft yarn portion 17 on the other end portion 11b side, respectively. Differently, the core wire 62 is inserted into a common hole formed by meshing the warp yarns 3 of the non-weft yarn portions 15 and 17 of the end portions 11a and 11b, and the woven fabric portions 11e and 11g respectively provided with the end portions 11a and 11b. Are joined together.

  In this configuration, the warp 3 of the non-weft portion 15 on the one end 11a side is entangled with the core wire 62, and this entangled portion 63 is restrained by the weft 4 of the weft portion 18 on the other end 11b side, Since the warp 3 of the non-weft yarn portion 17 on the other end portion 11b side is entangled with the core wire 62 and this entangled portion 64 is restrained by the weft yarn 4 of the weft yarn portion 16 on the one end portion 11a side, the end portion 11a The relative displacement of the woven fabric portions 11e and 11g each having 11b is prevented, and high dimensional stability can be obtained without displacement with respect to the external force in the length direction.

  In particular, in this configuration, since the high strength can be secured against the external force in the length direction without depending on the entanglement of the fibers forming the nonwoven fiber layer 2, the nonwoven fiber layer 2 is laminated and integrated on the base fabric 61. In the needling process, similarly to the example shown in FIG. 2D, the base fabric 61 is joined endlessly by the joining loops 6 and 7, and tension is applied to the base fabric 61 by a roll to moderate the base fabric 61. It is possible to prevent the end portions 11a and 11b of the woven fabric 11 from being displaced when being in a tensioned state.

  FIG. 7 is a schematic cross-sectional view showing a joining operation state of the woven fabric shown in FIG. The base fabric 61 shown in FIG. 6 is manufactured in substantially the same manner as the example shown in FIG. 2, but in order to join the woven fabric portions 11e and 11g with the core wire 62, first, as shown in FIG. Then, the warp yarns 3 of the non-weft yarn portions 15 and 17 are bent, and then, as shown in (B), the bent portions of the warp yarns 3 of the end portions 11a and 11b are alternately engaged, and the core wire 62 is inserted into the common hole formed thereby. Insert. Then, as shown in (C), the weft yarn portions 16 and 18 are superposed on the non-weft yarn portions 17 and 15, respectively.

  In order to prevent the end portions 11a and 11b from warping during the manufacturing, the overlapping portions of the non-weft yarn portions 15 and 17 and the weft yarn portions 16 and 18 may be temporarily fixed by welding or sewing.

  FIG. 8 is a cross-sectional view showing a modification of the felt shown in FIG. In this base fabric 81, similarly to the example of FIG. 4, two weft yarn portions 15 and two weft yarn portions 16 are alternately provided in the overlapping region 13 on the end portion 11 a side of the woven fabric 11. In the overlapping region 14 on the end portion 11b side, two non-weft yarn portions 17 and two weft yarn portions 18 are provided alternately, and the non-weft yarn portion 15 and the weft yarn portion 16 on the one end portion 11a side are provided on the other side. It overlaps with the weft yarn portion 18 and the non-weft yarn portion 17 on the end portion 11b side.

  Further, here, similarly to the example of FIG. 6, the core wire 62 is inserted into the common hole formed by meshing the warp yarns 3 of the non-weft yarn portions 15 and 17, and the woven fabric provided with the end portions 11a and 11b, respectively. The portions 11e and 11g are joined to each other, and two joint portions by the core wire 62 are provided.

  FIG. 9 is a cross-sectional view showing another example of the felt according to the present invention. This felt is an endless felt, and the base fabric 91 is endless by joining the end portions 11a and 11b of one end woven fabric 11 to each other, and a joining loop as in the above example is formed. I do not have. The end portions 11a and 11b of the woven fabric 11 are joined by overlapping the non-weft yarn portions 15 and 17 and the weft yarn portions 16 and 18 formed in the overlapping regions 13 and 14 as in the example of FIG.

  The end joining structure according to the present invention is such that when the folding-type base fabric is manufactured as described above, the end of one end woven fabric is joined, or one end woven fabric is joined. In addition to producing an endless base fabric by joining the end portions, it can also be applied to finishing the base fabric by joining the end portions from a plurality of end woven fabrics.

  FIG. 10 is a cross-sectional view showing another example of the felt according to the present invention. The felt is an endless felt as in the above example, but the base fabric 101 has a two-layer structure in which two end-woven fabrics 102 and 103 are overlapped. The woven fabric 102 is endless by joining the end portions 102a and 102b to each other in the manner described above. Similarly, the woven fabric 103 is endless by joining the end portions 103a and 103b to each other in the manner described above. None, the joint portions of the end portions 102a and 102b and the end portions 103a and 103b are arranged shifted in the length direction.

  In this structure, since one joining part of the woven fabrics 102 and 103 overlaps with the other ground part and is reinforced, the strength can be increased.

  FIG. 11 is a cross-sectional view showing a resin impregnated portion of the felt shown in FIG. This felt has a resin-impregnated portion 27 formed by impregnating a resin material from the papermaking surface 25 side. Here, the resin impregnated portion 27 is formed in the region of the non-woven fiber layer portion 2a on the papermaking surface 25 side and the base fabric 1 excluding the non-woven fiber layer portion 2b on the running surface 26 side. The resin impregnated portion 27 is formed to have a slight water permeability by an appropriate impregnation treatment such as immersion of an uncured resin material.

  The resin material forming the resin impregnated portion 27 is preferably an elastomer material having an appropriate elasticity that does not impair the flexibility of the nonwoven fiber layer 2, such as polyurethane. Further, the amount of impregnation of the resin material may be appropriately set based on characteristics such as water permeability required depending on the application. For example, in the application as a papermaking belt, the resin material is formed so as not to have water permeability. Is also possible.

  When resin processing is performed by impregnating the resin material in this way, it is possible to reduce the occurrence of marks on the paper due to the structural difference between the joint portion and the ground portion of the base fabric in which the overlapping regions are overlapped. In addition, it is possible to improve thickness retention, water squeezing, surface smoothness, durability and the like.

  The present invention is not limited to the form of the resin impregnated portion 27 described above. A resin material is applied from the papermaking surface 25 side to form a resin coating layer, and the nonwoven fiber layer on the papermaking surface 25 side is formed. A form in which the resin material exists only in the surface portion of the portion 2a is also possible. Moreover, the form which forms a resin impregnation part so that all layers of felt including the nonwoven fabric layer part 2b by the side of the running surface 26 may be covered is possible, and what is necessary is just to employ | adopt an appropriate form according to a use.

  The felt for papermaking and the method for producing the same according to the present invention are such that there is no significant difference in physical properties from the ground portion at the end where the ends of the endless woven fabric that is the base fabric are joined together. It is useful as a papermaking felt (including papermaking belts) used in various parts of a paper machine, and has the effect of simplifying the joining work at the end of the paper and reducing the number of manufacturing steps. It is more effective when used as a press felt used in the pressing part).

Sectional view showing an example of felt according to the present invention Schematic cross-sectional view showing the manufacturing process of the felt shown in FIG. The perspective view which shows the principal part of the woven fabric shown in FIG. Sectional drawing which shows the modification of the felt shown in FIG. The perspective view which shows the principal part of the woven fabric shown in FIG. Sectional view showing another example of felt according to the present invention Typical sectional drawing which shows the joining operation condition of the woven fabric shown in FIG. Sectional drawing which shows the modification of the felt shown in FIG. Sectional view showing another example of felt according to the present invention Sectional view showing another example of felt according to the present invention Sectional drawing which shows the resin impregnation part of the felt shown in FIG.

Explanation of symbols

1 · 91 · 101 Base fabric 2 Non-woven fiber layer 3 Warp 4 Weft 6 · 7 Joined loop 11 · 102 · 103 Woven fabric 11a · 11b · 102a · 102b · 103a · 103b End portion 11e to 11g Woven fabric portion 13 · 14 Superposition region 15/17 Non-weft part 16, 18 Weft part 28 Resin-impregnated part 62 Core wire

Claims (6)

A non-woven fiber layer is laminated and integrated on a base fabric by needling, and a papermaking felt in which ends of the end woven fabric to be the base fabric are joined to each other,
A pair of end portions joined to each other are provided at each end portion of the woven fabric serving as the base fabric with a superposed region composed of a non-weft portion formed by pulling out the weft and a weft portion similar to the ground portion. The end portions of the woven fabric are overlapped with each other so that the weft yarn portion and the non-weft yarn portion provided on one side overlap the non-weft yarn portion and the weft yarn portion provided on the other side, respectively. Papermaking felt.   2. The papermaking felt according to claim 1, wherein a core wire is inserted into a common hole formed by alternately meshing the warp yarns of the non-weft yarn portion provided at each end portion of the woven fabric.   The felt for papermaking according to claim 1, wherein the weft yarn portion is provided on a terminal side of the woven fabric.   2. The papermaking felt according to claim 1, wherein a resin material is impregnated or coated from the papermaking surface side.   The base fabric is configured by stacking a plurality of the woven fabrics, and each joint portion in which an end portion is joined by the overlapping region for each of the plurality of woven fabrics is arranged shifted in the length direction. The papermaking felt according to claim 1. A non-woven fiber layer is laminated and integrated on a base fabric by needling, and a method for producing a papermaking felt in which ends of the end woven fabric to be the base fabric are joined to each other,
At each end of the woven fabric serving as the base fabric, there is provided a superposition region composed of a non-weft yarn portion formed by pulling out the weft yarn and a weft yarn portion similar to the ground portion, and a pair of end portions joined to each other. The ends of the woven fabric are overlapped with each other so that the weft yarn portion and the weft yarn portion provided on one side overlap the non-weft yarn portion and the weft yarn portion provided on the other side, respectively. A method for producing felt for papermaking.

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