JP2017145518A - Papermaking woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve paper-surface characteristics in a papermaking woven fabric.SOLUTION: A papermaking woven fabric (10) is formed by weaving papermaking surface side weft yarns (11), running surface side weft yarns (12), and warp yarns (13). In a weave repeat, each warp yarn has a plain weave part (14) consecutively including at least three plain weave structures. The plain weave part of any warp yarn borders on the plain weave part of any one of the next warp yarn, the next warp yarn but one, and the next warp yarn but two while being shifted in a weft direction so that plain weaves continue while being shifted stepwise in the weft direction. Every papermaking surface side weft yarn constitutes the papermaking surface side weft yarn other than those at end parts in at least one plain weave part.SELECTED DRAWING: Figure 4

Description

  The present disclosure relates to a papermaking fabric, for example, a papermaking fabric suitable for a papermaking wire used in a wire part (wet part) of a papermaking machine.

  Papermaking fabrics constructed by weaving warps and wefts are used in many applications such as papermaking wires, press felts, press belts, and dryer canvases. The papermaking wire used in the wire part of the papermaking machine runs stably and without meandering in order to meet the demands for improving the quality of the paper produced and improving the production efficiency by increasing the production speed. Property, water removal from raw material liquid, dehydration and breathability, surface property to prevent surface irregularities from being transferred and remaining on paper (surface smoothness), prevention to prevent clogging and adhesion of adhesive components Durability, durability, etc. that can withstand damage due to dirtiness, wear and high-pressure cleaning are required. In order to satisfy these requirements, two types of wefts having different diameters are used in the papermaking wire, and the wefts having a small diameter are arranged on the papermaking surface side of the papermaking wire, and the wefts having a large diameter are arranged on the papermaking wire. There is a so-called warp single weft double structure in which a warp is woven into a weft arranged on the running surface side and a weft arranged on the paper making surface and a weft arranged on the running surface (for example, Patent Document 1). In many cases, in such a papermaking wire, the number of wefts arranged on the papermaking surface side is larger than the number of wefts arranged on the running surface side. Therefore, the papermaking surface is densely formed with respect to the running surface, and the surface smoothness of the manufactured paper is improved. Further, since the number of wefts on the running surface side is smaller than that on the paper making surface side, the porosity is increased and the dewaterability is improved. Moreover, since the diameter of the weft on the running surface side is larger than that on the paper making surface side, durability is improved.

  Further, in the papermaking fabric 1 according to Patent Document 1, as shown in FIGS. 1 to 3, after the warp yarn 2 weaves the papermaking surface side weft 3 into a plain weave shape three times, several papermaking surface side wefts 3 and One running surface side weft is woven in between the running surface side wefts 4. When viewed in the direction of the paper surface of FIG. 1, a warp 2 is shifted downward by three papermaking surface side wefts with respect to the warp 2 on the right side. In the papermaking fabric 1, when the plain weave portions 5 of the warp numbers 2 ′, 5 ′, 3 ′, and 1 ′ are connected in this order, the plain weave is formed on the 24 continuous wefts 3 on the paper-making surface side. It is formed. Warp No. The same applies to the plain weave portion 5 of the warp yarns 8 ', 6', 4 'and 2'.

Special table 2009-533560

  In the plain weave portion 5 itself, since the warp 2 is closely woven into the paper surface side weft 3, the mark on the manufactured paper is not easily noticeable. However, as shown in FIG. 3, in the papermaking fabric 1 in which the plain weave portions 5 are continuously arranged across the plurality of warps 2, they are woven at the boundary between the two plain weave portions 5 arranged so as to be continuous. The papermaking surface side weft 3 is weaker than the surrounding papermaking surface side weft 3 in supporting force from below by the warp 2 forming the plain weave portion 5. Such a portion is easier to dent than the surroundings, leaving a mark on the manufactured paper. This indented portion 6 is shown as a thin dot pattern in FIG. 1 (the dark dot pattern indicates a portion where the running surface side weft 4 passes over the warp 2). For example, weft No. The 6T papermaking side weft 3 is the warp No. 1 'and 5' warp 2 plain weave 5 and warp no. 3 'and 7' are arranged at the boundary of the plain weave portion 5 of the warp yarn 2, and the supporting force of the warp yarn 2 supported from below is weak (the warp yarn 2 is the weft No. 5T to 7T weft yarn side 3 on the paper surface side) Therefore, the recessed portion 6 is continuously generated in the weft direction. Since the recessed portions that are easy to be recessed with respect to the front and back plain weave portions 5 are continuous in the weft direction, the papermaking fabric 1 according to Patent Document 1 has a problem that a long weft mark is attached to the manufactured paper and the mark is conspicuous. there were.

  In view of the above problems, an object of the present invention is to prevent a large weft mark from being produced on a paper to be produced in a papermaking fabric and to improve the paper surface property.

  At least some embodiments of the present invention include a papermaking surface side weft (11) and a running surface side weft (12), and a warp yarn (13) woven into the papermaking surface side weft and the running surface side weft. Papermaking fabric (10, 20, 30, 40, 50, 60, 70), which is a minimum unit of a repetitive pattern by a plurality of papermaking surface side wefts, a plurality of running surface side wefts, and a plurality of warps A complete structure is formed, and in the complete structure, each of the warp yarns passes through the papermaking surface side of the papermaking surface side weft, the traveling surface side of the papermaking surface side weft next to it, and the traveling surface side weft It has at least one plain weave portion (14, 31, 61) having at least three plain weave structures passing through the paper-making surface side and passes through at least one running surface side of the running surface side weft [ As shown in FIG. In one embodiment, for example, weft No. 4T to 9T are warp Nos. The part woven into 1 '. Hereinafter, the brackets indicate examples in the first embodiment], any warp [warp No. 1 ′] of the plain weave portion and one end of the warp in the extending direction of the warp surface side weft [paper surface side weft No. 1]. 9T] on the side opposite to the plain weave portion, the next papermaking surface side weft [not the papermaking surface weft No. 8T constituting a part of the plain weave portion, but the paper making surface side weft No. adjacent to the opposite side. 10T] is one of the warp yarns [Warn No. 3 ′ (adjacent to warp No. 1 ′)] of the plain weave portion in the extending direction of the warp, and all of the paper surface side wefts of the complete structure [paper surface side wefts] No. 5T, 7T] at least in one place, the warp [Warn No. 1 ′] between the two portions of the papermaking surface side weft passing the papermaking surface side [papermaking surface side weft No. 1]. Between 4T and 8T], it passes through the papermaking surface side of the warp.

  According to this configuration, all the paper surface side wefts have a portion that is strongly supported by the warp, and the papermaking fabric supports the paper being manufactured in a well-balanced manner, and the support force is more relative to the front and rear portions in the warp direction. Therefore, since the low recessed portions (15, 32, 62) are not continuous in the weft direction, it is possible to prevent the weft marks from being noticeable on the manufactured paper.

  In at least some embodiments of the present invention, in the above-described configuration, the number of the warp yarns constituting the plain weave portion by being woven into one of the paper surface side wefts in the complete structure constitutes the complete structure. It is less than 1/2 of the total number of the warps.

  According to this configuration, it is possible to provide a papermaking fabric that balances paper surface properties, air permeability, and dewaterability.

  In the above embodiment, the configuration will be described more specifically. In the papermaking fabric (10, 20) in at least some embodiments, the complete structure has 16 warp yarns and 16 papermaking surface sides. Each of the plain weave portions (14) of the warp yarns includes six papermaking surface side weft yarns, and the one of the plain weave portions of any of the warp yarns The papermaking surface side weft constituting the end portion of the paper is adjacent to the papermaking surface side weft constituting the other end portion of the plain weave portion of the warp yarn adjacent to the two arbitrary warps. To do. Further, in the papermaking fabric (30, 40) in at least some embodiments, the complete structure has 16 warps, 24 papermaking side wefts, and 8 or 16 running surfaces. Each of the plain weave portions (31a) of one of the warp yarns that are odd numbers and the warp yarns that are even numbers when arranged in order, includes eight weft yarns on the paper-making surface side, Each of the plain weave portions (31b) of the other warp yarns and the even number warp yarns includes ten papermaking side wefts, and the one end of the plain weave portion of any warp yarn The papermaking surface side weft constituting the portion is adjacent to the papermaking surface side weft constituting the other end portion of the plain weave portion of the warp next to one or three of the arbitrary warps. Features. In addition, in the papermaking fabric (50) in at least some embodiments, the complete structure includes 16 warp yarns, 24 papermaking surface side wefts, and 4 running surface side wefts. The plain weave portion (31) of each of the warp yarns is a first plain weave portion (31a) including eight papermaking side wefts, or a second plain weave portion (31b) including ten papermaking side wefts. And the warp yarn adjacent to the two warp yarns having the first plain weave portion has the second plain weave portion and constitutes the one end of the plain weave portion of the arbitrary warp yarn. The side weft is adjacent to the paper-making-surface-side weft constituting the other end of the plain weave portion of the warp adjacent to the arbitrary two warps. In addition, the papermaking fabric (60, 70) in at least some embodiments has the complete structure including 16 warp yarns, 48 papermaking surface side wefts, and 16 running surface side wefts. Each of the plain weave portions (61) of the warp yarns includes a first plain weave portion (61a) including eight papermaking surface side wefts and ten papermaking surface side wefts, and A second plain weave portion (61b) disposed apart from the woven portion, and the one end of the first plain weave portion of any warp is adjacent to one of the optional warps, next to two And the one side of the second plain weave portion of any warp that is adjacent to the paper surface side weft constituting the other end of the second plain weave portion of the warp yarn of any one of the three adjacent warps The end portion of the warp is one of the adjacent one of the arbitrary warps, the next of the two, and the adjacent of the third of the warps. Characterized in that adjacent to the steel sheet surface side wefts constituting the end portion of the other side of the TairaOribe.

  According to the above configuration, in the papermaking fabric, it is possible to prevent a large weft mark from being produced on the produced paper and to improve the paper surface property.

Explanatory drawing of a papermaking fabric according to the prior art viewed from the papermaking side Schematic cross-sectional view of a papermaking fabric according to the prior art viewed from the warp direction Schematic sectional view of a portion having a plain weave portion of a papermaking fabric according to the prior art viewed from the weft direction Explanatory drawing which looked at the papermaking fabric which concerns on 1st Embodiment from the papermaking surface side Schematic sectional view of the papermaking fabric according to the first embodiment as seen from the warp direction Explanatory drawing which looked at the papermaking fabric which concerns on the modification of 1st Embodiment from the papermaking surface side Explanatory drawing which looked at the papermaking fabric which concerns on 2nd Embodiment from the papermaking surface side Explanatory drawing which looked at the papermaking fabric which concerns on the 1st modification of 2nd Embodiment from the papermaking surface side. Explanatory drawing which looked at the papermaking fabric based on the 2nd modification of 2nd Embodiment from the papermaking surface side Explanatory drawing which looked at the papermaking fabric which concerns on 3rd Embodiment from the papermaking surface side Explanatory drawing which looked at the papermaking fabric which concerns on the modification of 3rd Embodiment from the papermaking surface side

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Papermaking fabrics according to the following embodiments are used as wires for forming wet paper from paper stock (liquid) in a wire part (wet part) of a paper machine. Although the papermaking fabric attached to the papermaking machine has an endless belt shape, in the following description, for the sake of convenience, the papermaking surface side is the upper side and the running surface side is the lower side. The side where the small weft is present (the upper side of the explanatory view as seen from the paper-making surface side) is the front, the weft No. The side where the large weft is present (the lower side in the figure) is the rear, and warp No. On the side where the small warp is present (the right side of the figure), the warp No. The side where the larger warp is present (left side in the figure) is the left side.

<< First Embodiment >>
4 and 5 are a schematic plan view of the papermaking fabric 10 according to the first embodiment viewed from the papermaking surface side and a schematic cross-sectional view viewed from the warp direction. The papermaking fabric 10 is stretched over a roll of a papermaking machine and travels according to the rotation of the roll. The surface of the papermaking fabric 10 that is in contact with the stock and the wet paper is referred to as a papermaking surface, and the surface opposite to the papermaking surface is referred to as a running surface. On the papermaking surface of the papermaking fabric 10, paper stock is placed, and wet paper is formed by dehydration.

  The papermaking fabric 10 includes a papermaking surface side weft 11, a running surface side weft 12, and a warp 13 woven into both. The complete structure, which is the minimum unit of the repeated pattern of yarns to be woven, includes 16 paper surface side wefts 11, 8 running surface side wefts 12, and 16 warp yarns 13.

  In the complete structure, each of the warp yarns 13 passes through the plain weave structure that passes above the papermaking surface side weft 11 (the papermaking surface side) and passes below the papermaking surface side weft 11 next to it (the running surface side). It has one plain weave portion 14 provided with three, and passes one lower side (traveling surface side) of the traveling surface side weft 12 at one location. In the plain weave portion 14, the warp yarn 13 does not weave the running surface side weft 12 and passes above the running surface side weft 12. For example, the warp No. 1 shown in FIG. 1 ′ warp 13 (hereinafter referred to as “warp No. n ′” is referred to as “warp No. n ′”). The plain weave portion 14 is woven by weaving six papermaking side wefts 11 (hereinafter referred to as “papermaking side weft 11 of papermaking side weft No. nT” as “papermaking side weft No. nT”) of 4T to 9T. Formed, the running surface side weft No. 8B running surface side weft 12 (hereinafter referred to as “traveling surface side weft No. nB traveling surface side weft 12” is referred to as “traveling surface side weft No. nB”) is woven from below, and in the other parts, the papermaking surface It passes between the side weft 11 and the running surface side weft 12. Here, the above-mentioned “plain weave structure” corresponds to the plain weave portion 14 as passing above the paper surface side weft 11 arranged in front and passing below the paper surface side weft 11 adjacent to the rear side. No. of paper surface side weft 11 (Note that the above-mentioned “plain weave structure” is regarded as a method of weaving the warp yarn 13 from the rear to the front, and the paper surface side weft 11 forming the plain weave portion 14 of the warp No. 1 ′ is the paper surface side weft No. 8T to 3T, but in the following description, the weft number on the paper-making surface side when the above “plain weave structure” is regarded as a method of weaving the warp yarn 13 from the front to the back is described).

  In the papermaking fabric 10, for example, warp No. Paper weft surface side weft No. 1 forming the rear end of the plain weave 14 of 1 ′. 9T is the warp No. 3 ′ (two warps 13 adjacent to the left side of warp No. 1 ′), the weft No. on the paper-making side forming the front end of the plain weave 14. Adjacent to 10T. Warp No. 3 'plain weave 14 and warp no. The same applies to the relationship with the 5 ′ plain weave portion 14, and this relationship applies to the plain weave portion 14 of an arbitrary warp 13 and the plain weave portion 14 of the warp 13 located adjacent to the left two of the warp 13. Therefore, as indicated by the mark “◯” in FIG. In 1 ′, 3 ′, 5 ′, 7 ′, 9 ′, 11 ′, 13 ′, and 15 ′, the plain weave portion 14 is shifted from the front toward the rear and the warp 13 adjacent to the two on the left, It is formed continuously. In this way, a continuous plain weave is formed as a whole. Warp No. The same applies to 2 ′, 4 ′, 6 ′, 8 ′, 10 ′, 12 ′, 14 ′ and 16 ′, and another plain weave series is formed.

  The plain weave portion 14 will be described by paying attention to each papermaking side weft 11. As shown in FIG. 4 and FIG. 3T is warp no. Four warps 13 of 4 ′, 5 ′, 8 ′, 11 ′, 14 ′ and 15 ′ and a plain weave portion 14 are formed (warp No. 1 ′ is defined in the plain weave portion 14 in this specification). The weft No. 3T and the plain weave 14 are not formed). The other wefts 11 on the paper-making surface also form six warps 13 and plain weave portions 14. As described above, in the complete structure, the number of warp yarns 13 woven so that any one of the paper surface side wefts 11 forms the plain weave portion 14 is the total number of 16 warps 13 constituting the complete structure. Less than 8 of / 2. By adopting such a configuration, it is possible to prevent the ratio of the plain weave portion 14 from becoming excessive on the surface on the papermaking surface side. The plain weave portion 14 has high paper surface properties because the warp yarns 13 pass alternately above and below the paper surface side weft yarns 11, but is inferior in air permeability and dewaterability. Therefore, the desired breathability and dewaterability are ensured by adopting the above configuration.

  The papermaking fabric 10 holds paper stock and wet paper on the surface on the papermaking surface side. The papermaking surface side wefts 11 and warps 13 come into contact with the paper stock or wet paper. Since the warp 13 directly supports the paper surface side weft 11, the plain weave portion 14 in which the warp 13 is woven is the largest support for the stock and wet paper in the paper surface side weft 11. In particular, the supporting force of the papermaking surface side wefts 11 in which the warp yarns 13 are arranged above the papermaking surface side wefts 11 on both sides of the front and back and the warp yarns 13 are arranged below itself is increased. For example, warp No. When the paper surface side weft 11 woven with 1 'is seen, the paper surface side weft No. 1 is shown. The support force of 5T and 7T is large. The plain weave 14 is a warp No. No. 1 on the 6 papermaking side wefts weaving 1 ' Although composed of 4T to 9T, weft No. The 5T and 7T papermaking surface side wefts 11 correspond to the end of the papermaking surface side wefts 11 included in the plain weaving part 14 from the papermaking surface side wefts 11 through which the warp 13 passes under itself ( Papermaking surface side weft No. 9T) is excluded. In other words, the warp No. At the position along 1 ', the paper surface side weft no. 5T and 7T are two papermaking surface side wefts No. 2 in which the warp 13 passes above the papermaking surface side wefts 11 in the plain weave 14. It passes over the warp 13 between 4T and 8T. As shown in FIG. 4, the same relationship is established between the other warp yarns 13 and the papermaking surface side weft yarns 11. When this relationship is viewed from the direction along the papermaking surface side weft 11, the supporting force of any papermaking surface side weft 11 increases at a position along two corresponding warps 13. For example, weft No. 5T is warp no. In addition to the position along 1 ', the warp No. 11 ′, the supporting force increases, and the weft No. 7T is warp no. In addition to the position along 1 ′, the warp No. The supporting force increases at a position along 7 '. Accordingly, in all the papermaking surface side wefts 11, the portion that exhibits a relatively large supporting force is a part of each plain weave portion 14, and such a portion is included in all the papermaking surface side wefts 11. The paper fabric 10 is arranged in a well-balanced manner. Accordingly, a large latitude mark is not attached to the paper to be manufactured, and the paper surface property is improved.

  Such a relationship will be described from the viewpoint of the recessed portion 15. The recessed portion 15 is a portion indicated by a thin dot pattern in FIG. 4, and is a portion having a relatively weak supporting force for supporting the paper and wet paper as compared with the front and rear portions thereof. Each recessed portion 15 in the present embodiment is caused by the same cause as the recessed portion 6 shown in FIG. 3 with respect to the prior art, and the continuous weaving from the front to the rear is the plain weaving portion 14 of the optional warp 13. To the left side of the warp 13 adjacent to the plain weave portion 14. For example, weft No. Focusing on 9T, warp No. 1 'and warp no. The recessed part 15 has arisen between 3 ', and the recessed part 15 has not arisen in the other part. Furthermore, weft No. 9T is the warp No. It corresponds to a portion where the supporting force of the plain weave portion 14 is relatively strong at positions along 7 ′ and 13 ′. In this way, the papermaking side weft No. The concave portion 15 is formed in 9T, not over the entire weft direction, but the warp No. 1 'and warp no. Since it is only the part between 3 ', it is suppressed that a large latitude mark sticks to the paper manufactured. As shown in FIG. 4, the same applies to the other weft 11 on the paper-making surface side. Further, since the recessed portions 15 are arranged in a distributed manner in the warp direction, it is possible to prevent relatively short weft marks from being concentrated in a short section in the warp direction in the manufactured paper, and the marks are not conspicuous.

  The diameter of the running surface side weft 12 is preferably larger than the diameter of the paper surface side weft 11. Odd number No. 1 that forms a series of plain weaves as a whole. The warp yarns 13 weave the running surface side wefts 12 that are closest to the papermaking surface side wefts 11 that are six to seven behind the papermaking surface side wefts 11 at the rear end of the plain weave 14 from below. Even No. 4 forming another plain weave series. In the warp yarn 13, the running surface side weft 12 closest to the papermaking surface side weft 11 behind the papermaking surface side weft 11 at the rear end of the plain weave portion 14 is woven from below. Therefore, the odd number No. No. 13 and even number No. adjacent to the left side thereof. The warp yarns 13 of the same weave one of the same running surface side weft yarns 12. Further, each running surface side weft 12 is woven only once by one warp 13 in the complete structure.

  Although the form of the paper surface side weft 11, the running surface side weft 12, and the warp 13 is not particularly limited, monofilament single yarn and twisted yarn can be used, and it is particularly preferable to use a single yarn. Further, each yarn may be a processed yarn subjected to crimping processing, bulky processing, or the like, or may be a non-processed yarn. Among these, non-processed yarn is preferable.

  Although the material which comprises the paper-making surface side weft 11, the running surface side weft 12, and the warp 13 is not specifically limited, A polyamide resin and a polyester resin are preferable. The polyamide-based resin is preferably an aliphatic polyamide resin, and more preferably nylon. Examples of nylon include nylon 66, nylon 6, nylon 12, nylon 11, nylon 610, nylon 612, and the like. These may use only 1 type and may use 2 or more types together. The polyester resin is not particularly limited as long as it is a polyester composed of dicarboxylic acid and glycol, and may be polyethylene terephthalate (PET), polypropylene terephthalate, polybutylene terephthalate (PBT), polyethylene naphthalate, or the like. These may use only 1 type and may use 2 or more types together. Further, the papermaking surface side weft 11, the traveling surface side weft 12 and the warp 13 may be made of the same material or different materials. Moreover, each thread | yarn may be comprised with the single material, respectively, and may be comprised with 2 or more types of materials from which a material differs. Furthermore, each yarn may contain an inorganic filler and / or an organic filler.

<Modification of First Embodiment>
Next, with reference to FIG. 6, a papermaking fabric 20 according to a modification of the first embodiment will be described. In the description, only portions different from the above embodiment will be described.

  The papermaking fabric 20 has the same weaving method of the papermaking surface side weft 11 and the warp 13 as in the above embodiment, but the weaving method of the running surface side weft 12 and the warp 13 is different from that of the above embodiment. Odd number No. 1 that forms a series of plain weaves as a whole. In the warp yarn 13, the running surface side weft 12 closest to the papermaking surface side weft 11 behind the papermaking surface side weft 11 at the rear end of the plain weave portion 14 is woven from below. Even No. 4 forming another plain weave series. In the warp yarn 13, the running surface side weft 12 that is closest to the papermaking surface side weft 11 6 to 7 behind the papermaking surface side weft 11 at the rear end of the plain weave portion 14 is woven from below. Therefore, the odd number No. No. 3 and the even number No. 3 arranged next to the three on the right. The warp yarns 13 of the same weave one of the same running surface side weft yarns 12. It is to be noted that each running surface side weft 12 is woven only once by one warp 13 in the complete structure as in the above embodiment.

<< Second Embodiment >>
Next, a paper fabric 30 according to the second embodiment will be described with reference to FIG. The complete structure of the papermaking fabric 30 includes 24 paper surface side wefts 11, 8 running surface side wefts 12, and 16 warp yarns 13.

  In the complete organization, odd numbers Each of the warp yarns 13 has one first plain weave portion 31a having four plain weave structures in succession. Each of the warp yarns 13 has one second plain weave portion 31b having five continuous plain weave textures (hereinafter collectively referred to as "first plain weave portion 31a" and "second plain weave portion 31b" Simply referred to as “plain weave 31”). Each warp 13 passes under one (traveling surface side) of the traveling surface side weft 12 at one location. In the plain weave portion 31, the warp 13 passes above the running surface side weft 12 without weaving the running surface side weft 12. In other parts, the warp 13 passes between the papermaking surface side weft 11 and the traveling surface side weft 12. For example, warp No. 1 ′ is the eight papermaking surface side weft Nos. 1T to 8T are weaved to form the first plain weave portion 31a, and one running surface side weft No. 5B is woven from below, and the other part passes between the weft 11 on the paper-making surface side and the weft 12 on the traveling surface side. In addition, warp No. 4 ′ is the ten papermaking surface side weft Nos. 9T to 18T are weaved to form a plain weave portion 31b. 8B is woven from below, and the other part passes between the paper surface side weft 11 and the running surface side weft 12.

  As indicated by a mark “◯” in FIG. In 1 ′, 4 ′, 5 ′, 8 ′, 9 ′, 12 ′, 13 ′, and 16 ′, the plain weave portion 31 is continuous while shifting to the left as it goes from the front to the rear. As for the shift to the left, the shift to the three adjacent warps 13 and the shift to the one adjacent warp 13 appear alternately. In this way, a continuous plain weave is formed as a whole. Specifically, warp no. The paper surface side weft No. 1 forming the rear end of the plain weave 31 of 1 ′. 8T is warp no. 4 ′ (three warps 13 adjacent to the left of the warp No. 1 ′), the weft No. 1 on the paper-making surface side that forms the front end of the plain weave 31. Adjacent to 9T. And warp No. Paper weft-side weft No. 4 forming the rear end of the 4 'plain weave 31. 18T is warp no. 5 ′ (the warp yarn No. 4 ′, one warp yarn 13 adjacent to the left side) of the plain weave portion 31 forming the front end portion of the weft No. Adjacent to 19T. Such a relationship is also established between the other warps 13 described above. Similarly, the warp No. 2 ', 3', 6 ', 7', 10 ', 11', 14 'and 15' also form another plain weave series.

  Also in the papermaking fabric 30 according to the second embodiment, in the complete structure, the number of warp yarns 13 woven so that an arbitrary one of the papermaking surface side wefts 11 forms the plain weave portion 31 is the number of warp yarns 13 constituting the complete structure. The number is less than 16 which is 1/2 of 16 which is the total number. For example, weft No. 3T has 6 warp Nos. The plain weave portion 31 is formed with six of 1 ′, 3 ′, 8 ′, 10 ′, 12 ′ and 14 ′.

  The weft 11 on the paper-making surface side that constitutes the plain weave portion 31 and the warp 13 passes below itself has a supporting force for supporting the stock and wet paper except for the one constituting the rear end of the plain weave portion 31. There are two or three such places on each papermaking surface side weft 11, and these places are arranged in a well-balanced manner on the entire papermaking fabric 30. Accordingly, a large latitude mark is not attached to the paper to be manufactured, and the paper surface property is improved. For example, weft No. In 4T, the warp No. 1 ', 8' and 12 'are weaved at the place where weaving is large. In 5T, the warp No. The supporting force is large at the places where 10 'and 15' are woven.

  As shown by the thin dot pattern in FIG. 7, the recessed portion 32 having a relatively small supporting force for supporting the paper and the wet paper as compared with the front and rear portions thereof is a flat weave of any warp 13 in a continuous plain weave as a whole. It occurs at a portion where the weaving portion 31 is switched to the plain weaving portion 31 of the one or three adjacent warps 13 on the left side. In the portion that is switched to the next one, a recessed portion 32 (for example, a portion where the papermaking surface side weft No. 6T intersects with the warp yarns No. 12 ′ and 13 ′) is formed, and the two are switched to the next. In the portion, a recessed portion 32 (for example, a portion where the weft No. 2T and the warp Nos. 5 ′ to 8 ′ intersect) is formed for four warps. In the complete structure, the concave portion 32 of each weft 11 on the paper-making surface side is one place, so that a large weft mark is restrained from being produced. Further, since the recessed portions 32 are also arranged in the warp direction, the relatively short weft marks are prevented from concentrating on a short section in the warp direction in the manufactured paper, and the marks are not conspicuous.

  When weaving the warp 13 and the weft 12 on the running surface side, paying attention to the warp 13, (a) warp no. 1 ′, 5 ′, 9 ′, and 13 ′ (the warp yarn 13 having the first plain weave portion 31a and forming one continuous plain weave) 6 to 7 from the weft 11 on the paper-making surface side at the rear end of the plain weave portion 31a. The running surface side wefts 12 that are closest to the papermaking surface side wefts 11 in the back are woven from below, and (b) Warp No. 4 ′, 8 ′, 12 ′, and 16 ′ (the warp yarn 13 having the second plain weave portion 31b and forming one continuous plain weave) are 5-6 from the weft 11 on the paper-making surface side at the rear end of the plain weave portion 31a. The running surface side wefts 12 that are closest to the papermaking surface side wefts 11 at the back of the book are woven from below, and (c) Warp No. 3 ′, 7 ′, 11 ′ and 15 ′ (the warp yarn 13 having the first plain weave portion 31a and forming the continuation of the other plain weave portion) are 9 to 10 on the paper-making side wefts 11 at the rear end of the plain weave portion 31a. The running surface side weft 12 that is closest to the back side papermaking side weft 11 is woven from below, and (d) Warp No. 2 ′, 6 ′, 10 ′ and 14 ′ (the warp yarn 13 having the second plain weave portion 31b and forming the continuation of the other plain weave portion) 8 to 9 from the weft 11 on the paper-making surface side at the rear end of the plain weave portion 31a. The running surface side wefts 12 that are closest to the papermaking surface side wefts 11 are woven from below. Further, when focusing on the traveling surface side wefts 12, each traveling surface side weft 12 weaves two warps 13 positioned adjacent to each other.

<First Modification of Second Embodiment>
Next, with reference to FIG. 8, the papermaking fabric 40 according to a first modification of the second embodiment will be described. In the description, only parts different from the papermaking fabric 30 according to the second embodiment will be described. The papermaking fabric 40 is different from the second embodiment in the number of running surface side wefts 12 and how to weave them. The complete structure of the papermaking fabric 40 includes 16 running surface side wefts 12.

  Each warp 13 is woven from below one running surface side weft 12 at two locations. Each of the running surface side wefts 12 weaves two warp yarns 13 located adjacent to each other three by one.

<Second Modification of Second Embodiment>
Next, with reference to FIG. 9, the papermaking fabric 50 according to a first modification of the second embodiment will be described. In the description, only parts different from the papermaking fabric 30 according to the second embodiment will be described. The papermaking fabric 50 has a different way of weaving some of the warp yarns 13 and the paper-making surface side weft yarns 12, the combination of the warp yarns 13 forming a plain weave continuation is different from the second embodiment, and the number of running surface side weft yarns 12 The weaving method is different from that of the second embodiment.

As indicated by the mark “◯” in FIG. A continuous plain weave is formed as a whole by the warp 13. Even No. Another plain weave continuation is also formed by the warp 13.
As shown by a thin dot pattern in FIG. 9, the recessed portion 32 is a portion that switches from a plain weave portion 31 of any warp 13 to a plain weave portion 31 of two adjacent warps 13 on the left side in a continuous plain weave as a whole. Has occurred. As a result, as in the second embodiment, the first plain weave portions 31a and the second plain weave portions 31b appear alternately in the continuous plain weave. Moreover, all the recessed parts 32 become the length for three warps. The point that the recessed portions 32 to be formed are dispersed throughout is the same as in the second embodiment.

  The complete structure includes four running surface side wefts 12. Each of the running surface side wefts 12 continuously weaves two warps 13 at one place, and weaves one warp 13 at two places.

«Third embodiment»
Next, with reference to FIG. 10, the papermaking fabric 60 according to the third embodiment will be described. The complete structure of the papermaking fabric 60 includes 48 paper surface side wefts 11, 16 running surface side wefts 12, and 16 warp yarns 13.

  In the complete structure, each warp 13 has one first plain weave part 61a having four continuous plain weave structures and one second plain weave part 61b having five consecutive plain weave structures ( Hereinafter, the “first plain weave portion 61a” and the “second plain weave portion 61b” are simply referred to as “plain weave portion 61”). Warp No. Reference numerals 1 'to 4' and 9 'to 12' indicate that the fourth papermaking surface side weft 12 constitutes the front end of the second plain weaving portion 61b rearward from the papermaking surface side weft 11 constituting the rear end of the first plain weaving portion 61a. doing. Warp No. 5'-8 'and 13'-16' are the 4th papermaking surface side weft 12 in the front from the papermaking surface side weft 11 which comprises the front end of the 1st plain weave part 61a, and comprise the rear end of the 2nd plainweaving part 61b. doing. Any warp 13 passes under one of the running surface side wefts 12 at four locations. In the plain weave portion 61, the warp yarn 13 does not weave the running surface side weft 12 and passes above the running surface side weft 12. In other parts, the warp 13 passes between the papermaking surface side weft 11 and the traveling surface side weft 12. For example, warp No. 1 'warp 13 has eight papermaking surface side weft Nos. 1T to 8T are weaved to form the first plain weave portion 61a, and the ten papermaking surface side weft Nos. 12T to 21T are formed to form the second plain weave portion 61b, and the four running surface side wefts No. 8B, 10B, 12B, and 14B are woven from below, and other portions pass between the papermaking surface side weft 11 and the traveling surface side weft 12. In addition, warp No. The 5 'warp 13 has eight paper surface side weft Nos. 19T to 26T are weaved to form the first plain weave portion 61a. 6T to 15T are woven to form the second plain weave portion 61b, and the four running surface side wefts No. 1B, 11B, 13B, and 15B are woven from below, and the other portions pass between the papermaking surface side weft 11 and the traveling surface side weft 12.

  In the papermaking fabric 60, a series of two plain weaves is formed by 16 warp yarns 13. One of them is a warp No. as indicated by “◯” and “◎” in FIG. 1 'first plain weave 61a, and two warp No. 3 ′ second plain weave portion 61b, and on the left side, two adjacent warps No. 5 '1st plain weave part 61a, 3 thread warps No. 8 '2nd plain weave 61b, and one warp No. 9 'first plain weave portion 61a, and two adjacent warps No. 11 '2nd plain weave part 61b, and 3 adjacent warp No. 14 'first plain weave portion 61a, and one warp No. 15 '2nd plain weave part 61b, 3 to the left of it, next to the warp No. 2 ′ first plain weave portion 61a, and two adjacent warps No. 4 ′ second plain weave portion 61b, and on the left side, two adjacent warp No. 6 '1st plain weave 61a, and one warp No. 7 'second plain weave portion 61b, three warps No. 10 'first plain weave portion 61a, and on the left side, two adjacent warps No. 12 ′ second plain weave portion 61b, and a warp No. 13 'first plain weave portion 61a, three warps No. 16 'second plain weave portion 61b, and then, on the left side, one adjacent warp No. 1 'first plain weave portion 61a (completely textured, shifted to the left by two and backward by three from the first described). Another one is warp no. 3 '1st plain weave part 61a, the warp no. 5 '2nd plain weave part 61b and two warp No. 7 'first plain weave portion 61a, three warps No. 10 '2nd plain weave part 61b and the warp no. 11 'first plain weave portion 61a, and on the left side, three adjacent warps No. 14 'second plain weave portion 61b, and on the left side, two adjacent warps No. 16 'first plain weave portion 61a, and one warp No. 1 'second plain weave 61b, three on the left side of the second weave No. 4 ′ first plain weave portion 61a, and two adjacent warps No. 6 '2nd plain weave part 61b and two warp No. 8 'first plain weave portion 61a, and on the left side, one warp No. No. 9 'second plain weave 61b, three warps No. 12 ′ first plain weave portion 61a, and a warp No. 13 '2nd plain weave part 61b, the warp No. 15 ′ first plain weave portion 61a, and on the left side, three adjacent warps No. 2 '2nd plain weave part 61b.

  Also in the papermaking fabric 60 according to the third embodiment, in the complete structure, the number of warp yarns 13 woven so that an arbitrary one of the papermaking surface side wefts 11 forms the plain weave portion 31 is equal to the number of warp threads 13 constituting the complete structure. The number is less than 16 which is 1/2 of 16 which is the total number. For example, weft No. 3T has 6 warp Nos. Plain weave portions 31 are formed with 1 ', 3', 7 ', 9', 11 'and 14'.

  The weft 11 on the paper-making surface side, which constitutes the plain weave 61 and the warp 13 passes underneath, has a supporting force for supporting the paper stock and wet paper except for the one constituting the rear end of the plain weave 61. There are two or three such places on each papermaking surface side weft 11, and these places are arranged in a well-balanced manner on the entire papermaking fabric 30. Accordingly, a large latitude mark is not attached to the paper to be manufactured, and the paper surface property is improved. For example, weft No. In 4T, the warp No. 1 ', 7' and 11 'have a large supporting force at the place where weaving, and the paper surface side weft No. In 5T, the warp No. The supporting force is large at the places where 9 'and 16' are woven.

  As shown by the thin dot pattern in FIG. 10, the recessed portion 62 having a relatively small supporting force for supporting the paper and the wet paper as compared with the front and rear portions thereof is a flat weave of any warp 13 in a continuous plain weave as a whole. It occurs at a portion where the first to third adjacent warp yarns 13 are switched from the woven portion 61 to the left to the plain weave portion 61. A recessed portion 62 corresponding to two warps is formed in a portion that is switched to the next to one, a recessed portion 62 corresponding to three warps is formed in a portion that is switched to the next to two, and a warp 4 is formed in a portion that is switched to the next to the third. A recess portion 62 corresponding to the length is formed. In the complete structure, since the recessed portion 62 of each papermaking surface side weft 11 is one place, it is possible to suppress a large weft mark from being attached to the paper to be manufactured. Further, since the recessed portions 62 are also arranged in the warp direction, the relatively short weft marks are prevented from concentrating on a short section in the warp direction in the manufactured paper, and the marks are not conspicuous.

  When the weaving of the warp 13 and the weft 12 on the running surface side is focused on the warp 13, between the two located below the plain weave 61a, the three located below the plain weave 61b, and the plain weave 61a and the plain weave 61b. One running surface side weft 12 behind one and one front of the plain weave portion 61a and one behind the plain weave portion 61b does not weave the warp yarn 13, but in the other portions, the warp yarn 13 is formed into a plain weave shape in the running surface side weft yarn 12. Is woven into. Each running surface side weft 12 is woven with one warp 13 at four locations except for a part, and some running surface side wefts 12 (running surface side weft Nos. 9B and 13B) are at one location. The two warps 13 are continuously woven, and one warp 13 is woven in two places.

<Modification of Third Embodiment>
Next, with reference to FIG. 11, a papermaking fabric 70 according to a modification of the third embodiment will be described. In the description, only parts different from the papermaking fabric 60 according to the third embodiment will be described. The papermaking fabric 70 is different from the papermaking fabric 60 according to the second embodiment in the way of weaving the running surface side wefts 12. Each warp yarn 13 weaves one running surface side weft yarn 12 from below. Each of the running surface side wefts 12 weaves two warp yarns 13 that are adjacent to each other, one by one from below.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. You may weave warp and weft so that the right and left of each embodiment may be reversed. Further, the number of running surface side wefts, the position and number of weaving, and the weaving method may be changed. Further, the arrangement of the plain weave portions may be changed to change the configuration of the continuous plain weave. The number of plain weave portions in the complete structure may be three or more, and the plain weave portions may be composed of six or more plain weave structures.

10, 20, 30, 40, 50, 60, 70: Papermaking fabric 11: Papermaking surface side weft 12: Traveling surface side weft 13: Warp yarns 14, 31, 61: Plain weave portions 15, 32, 62: Recessed portion

Claims (6)

A papermaking fabric having a papermaking surface side weft and a running surface side weft, and a warp woven into the papermaking surface side weft and the running surface side weft,
A plurality of the papermaking surface side wefts, the plurality of running surface side wefts, and the plurality of warps form a complete structure that is a minimum unit of a repeating pattern,
In the complete structure, each of the warp yarns passes through the papermaking surface side of the papermaking surface side weft, and passes through the papermaking surface side of the papermaking surface side weft adjacent thereto and the papermaking surface side of the traveling surface side weft. Having at least one plain weave portion having at least three continuous textures, and passing at least one running surface side of the running surface side weft,
The papermaking surface side weft next to one side on the side opposite to the plain weaving portion of the papermaking surface side weft constituting one end of the warp extending direction of the plain weaving portion of the arbitrary warp is the arbitrary Constituting the other end in the warp yarn extending direction of the plain weave portion of any one of the warp yarns next to the warp yarn, next to the next, and next to the warp yarn,
All of the papermaking surface side wefts of the complete structure are at least at one location between the two portions where the warp thread passes through the papermaking surface side of the papermaking surface side wefts in one of the plain weave portions. A papermaking fabric characterized by passing through the papermaking surface.   In the complete structure, the number of the warps constituting the plain weave portion by being woven into one papermaking side weft is less than ½ of the total number of the warps constituting the complete structure. The papermaking fabric according to claim 1. The complete structure includes 16 warps, 16 papermaking surface side wefts, and 8 running surface side wefts,
Each plain weave portion of the warp includes six papermaking side wefts,
The papermaking surface side weft constituting the one end portion of the plain weave portion of any warp yarn constitutes the other end portion of the plain weave portion of the warp yarn adjacent to the two arbitrary warp yarns. The papermaking fabric according to claim 2, which is adjacent to the papermaking surface side weft. The complete structure includes 16 warps, 24 papermaking surface side wefts, and 8 or 16 running surface side wefts,
Each of the plain weave portions of the warp yarns that are odd numbers and the warp yarns that are even numbers when arranged in sequence, includes the eight paper-making-side wefts,
The plain weave portions of the other of the warp yarns that are the odd numbers and the warp yarns that are the even numbers include ten papermaking side wefts,
The papermaking surface side weft constituting the one end portion of the plain weave portion of any warp is the other end portion of the plain weave portion of the warp yarn adjacent to one or three adjacent warps. The papermaking fabric according to claim 2, wherein the papermaking surface side weft is adjacent to the weft. The complete structure includes 16 warps, 24 papermaking surface side wefts, and 4 running surface side wefts,
Each of the plain weave portions of the warp consists of a first plain weave portion including eight papermaking side wefts, or a second plain weave portion including ten papermaking side wefts,
The two warps adjacent to the warp having the first plain weave have the second plain weave,
The papermaking surface side weft constituting the one end portion of the plain weave portion of any warp yarn constitutes the other end portion of the plain weave portion of the warp yarn adjacent to the two arbitrary warp yarns. The papermaking fabric according to claim 2, which is adjacent to the papermaking surface side weft. The complete structure includes 16 warp yarns, 48 papermaking surface side wefts, and 16 running surface side wefts,
Each of the plain weave portions of the warp includes a first plain weave portion including eight papermaking surface side wefts and ten papermaking surface side wefts, and is disposed apart from the first plain weave portion. Including plain weave,
The one end portion of the first plain weave portion of any warp is the one of the second plain weave portion of the warp that is adjacent to one, two or three adjacent to the arbitrary warp. Next to the paper surface side weft constituting the other end,
The one end portion of the second plain weave portion of the arbitrary warp is the one of the first plain weave portion of the warp which is adjacent to the first, second or third of the arbitrary warp. The papermaking fabric according to claim 2, wherein the papermaking fabric is adjacent to the papermaking surface side weft constituting the other end.

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