JP2020050994A - Woven fabric for papermaking - Google Patents

Abstract

To improve dehydrating property and surface property in a woven fabric for papermaking having a papermaking surface side fabric layer and a running surface side fabric layer connected to the running surface side fabric layer by a warp self-bound yarn.SOLUTION: The subunit of a woven fabric for papermaking is formed of three mutually adjacent warp self-bound yarns 4, one upper warp yarn 6, a plurality of upper wefts 5, and a plurality of lower wefts 7. By alternately weaving the upper weft 5, the three warp self-binding yarns 4 in each subunit weave the upper weft 5 like one upper warp 6. In each subunit, in a range where one warp self-bound yarn 4 weaves the upper weft 5, the other two warp self-bound yarns 4 weave the common lower weft yarn 7, and the three warp self-bound yarns move to the traveling surface side fabric layer 3 after weaving the upper weft yarn 5 four times in a non-continuous manner. Since the rate of movement between the paper making surface side fabric layer 2 and the traveling surface side fabric layer 3 of the warp self-bound yarn 4 is small, the dehydration property is improved, and the surface property is improved because the upper warps 6 are arranged adjacent to the three warp self-bound yarns 4.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a papermaking fabric having a papermaking side fabric layer and a running surface side fabric layer connected to the running surface side fabric layer by a warp binding yarn.

  BACKGROUND ART Papermaking woven fabrics formed 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 paper machine runs stably without wrinkles and meandering in order to meet the demands for improving the quality of the paper to be produced and increasing production efficiency by increasing the production speed. Properties, dehydration (air permeability) to remove more water from the raw material liquid, surface properties (paper surface properties) to prevent transfer of surface irregularities to paper, and prevention of clogging and adhesion of adhesive components Dirtyness, wear resistance to withstand abrasion and the like are required.

  When a two-layer woven fabric is used as the wire, the woven layer on the papermaking side has a structure that emphasizes surface properties, and the woven layer on the running side has a structure that emphasizes abrasion resistance, so that the wire has both characteristics. In order to connect the papermaking surface side fabric layer and the running surface side fabric layer, a self-bonding yarn which connects both layers and forms one or both structures of both layers may be used.

  For example, in Patent Document 1, a subunit is formed by four warp binding yarns (warps) and a plurality of wefts adjacent to each other (see FIG. 4A), and two subunits are formed in each subunit. The warp binding yarn weaves a common lower weft to form a knuckle portion, and each warp binding yarn weaves a different upper weft to form a knuckle portion, thereby improving running stability and dimensional stability. An improved papermaking fabric is described.

  Further, Patent Document 2 discloses a papermaking side fabric layer having a structure composed of an upper weft, an upper warp, and a warp binding yarn (warp binding yarn), a lower weft, a lower warp, and a warp binding. A papermaking fabric having a running surface side fabric layer in which a texture is constituted by yarns is described. In the papermaking fabric described in Patent Document 2, one upper warp, three warp binding yarns adjacent to each other, a portion in which a subunit is formed by a plurality of upper wefts and a plurality of lower wefts, It is formed of a warp, a plurality of lower warps, a plurality of upper wefts, and a portion formed of a plurality of lower wefts (see FIG. 4B). In the subunit including the warp binding yarn, three warp binding yarns are formed in order to form a diagonal drainage space that extends obliquely downward from above in a random direction and to have excellent drainage. Alternately, the upper weft is woven like an upper warp, and the other two warp tying yarns, or the warp tying yarn and the lower warp are used as long as one warp binding yarn wovens the upper weft. The lower weft is woven.

Japanese Patent No. 5814330 Japanese Patent No. 4739903

  The papermaking fabric described in Patent Document 1 has a structure in which there is no upper warp having no binding portion and two warp binding yarns are interchanged, so that the intervals between the warps located on the papermaking surface side are not uniform. Dehydration is likely to be uneven. Since the papermaking fabric described in Patent Document 2 has a lower warp, the thickness is hardly reduced, and the three warp binding yarns are brought together only on the papermaking side to make one upper warp. In addition, the dewatering property inside the base cloth and on the running surface side was insufficient. In view of such a problem, the present invention provides a papermaking fabric having a papermaking surface side fabric layer and a traveling surface side fabric layer connected to the traveling surface side fabric layer by a warp binding yarn, and has a dewatering property ( The purpose is to improve air permeability and surface properties.

  The papermaking fabric (1, 11, 21, 31, 41) according to at least some embodiments of the present invention includes a papermaking surface side fabric layer (2, 12) and a warp binding yarn (4, 14, 34). , 44) and a running surface side fabric layer (3, 13) connected to the papermaking side fabric layer by the upper weft (5). And the upper warp (6) woven into the upper weft, and the warp binding yarn woven into the upper weft, and the running surface side fabric layer has a lower weft (7); The warp binding yarn woven into the lower weft, three warp binding yarns adjacent to each other, and one upper warp adjacent to the three warp binding yarns; A subunit is formed by the plurality of upper wefts and the plurality of lower wefts, and the upper warp passes over one upper weft; Thereafter, the upper weft is woven into the upper weft in a repeating unit that passes under two or more of the upper wefts, and the three warp binding yarns in each of the subunits are alternately arranged along the warp direction on the papermaking surface. By forming the texture of the side fabric layer, the upper weft is woven as one upper warp, and in each of the subunits, one warp binding yarn interweaves the upper weft. In the range, the other two warp binding yarns weave the common lower weft, and the three warp binding yarns each discontinue the upper weft two times or more in the same manner. After weaving by the number of times, the fabric moves to the running surface side fabric layer. Here, the warp binding yarn weaves the upper weft in a “non-continuous” manner, when the warp binding yarn passes over one upper weft, the warp binding yarn is located on both sides of the upper weft. Means below the upper weft.

  According to this configuration, the three warp binding yarns non-continuously weave the upper weft with the same number of times twice or more, so that the ratio of the switched portion in which the warp binding yarn moves between the two layers And the replacement part is evenly arranged, so that the dewatering property is improved. Further, since the upper warp having no binding portion is arranged in the subunit, the surface property is improved.

  The papermaking fabric according to at least some embodiments of the present invention, in the above-described configuration, the texture of the papermaking surface side fabric layer includes only the upper weft, the upper warp, and the warp binding yarn, and the running The structure of the surface-side woven fabric layer is characterized by comprising only the lower weft and the warp self-bonding yarn.

  According to this configuration, since there is no lower warp, the structure can be simplified and the papermaking fabric can be thinned.

  In the papermaking fabric (1, 11, 21, 41) according to at least some embodiments of the present invention, in any of the above-described configurations, the warp binding yarn discontinuously cuts the upper weft three times or more. After weaving five times, the fabric moves to the running surface side fabric layer.

  According to this configuration, the self-bonding yarn further reduces the ratio of the exchanged portion moving between the two layers, improves the dewatering property, and improves the adhesion between the papermaking surface side fabric layer and the running surface side fabric layer. Can be secured.

  In the papermaking fabric (1, 21, 31, 41) according to at least some embodiments of the present invention, in any of the above-described configurations, the warp binding yarn (4, 34, 44) in the subunit is , A first warp binding yarn (for example, No. 1 '), a second warp binding yarn (for example, No. 2'), and a third warp binding yarn (for example, No. 3 '). The first warp binding yarn, the second warp binding yarn and the third warp binding yarn are repeatedly woven into the upper weft in this order. Further, in the papermaking fabric (11) according to at least some other embodiments of the present invention, in any of the above configurations, the warp binding yarn (14) in the subunit may be a first warp yarn. The first warp (for example, No. 1 '), the second warp binding yarn (for example, No. 2'), and the third warp self-bonding yarn (for example, No. 3 '). The binding yarn, the second warp binding yarn, the third warp binding yarn and the second warp binding yarn are repeatedly woven into the upper weft in this order, and the second warp binding yarn is It is characterized by being woven into the upper weft more than the first and third warp binding yarns.

  According to these configurations, the fabric structure can be relatively simplified.

  In the papermaking fabric (1, 11, 31, 41) according to at least some embodiments of the present invention, in any of the above configurations, the upper warp yarn and the warp self-bonding yarn are directed to one of the weft directions. The one upper warp and the three warp binding yarns are repeatedly arranged in this order.

  According to this configuration, the three warp binding yarns in the subunit are arranged in a substantially equilateral triangle, with two of them being densely arranged on the running surface side and one being on the papermaking surface side above them. In addition, the thickness of the papermaking fabric can be reduced.

  In the papermaking fabric (21) according to at least some embodiments of the present invention, instead of the above-described configuration, the upper warp yarn and the warp self-bonding yarn are arranged such that the upper warp yarn is directed toward one side in a weft direction. A warp, six warp binding yarns and one upper warp are repeatedly arranged in this order.

  According to this configuration, since the self-bonding yarns are dense, the adhesiveness between the papermaking surface side fabric layer and the running surface side fabric layer can be increased, and the drainage property can be improved.

  In the papermaking fabric (1, 11, 21, 31, 41) according to at least some embodiments of the present invention, in any of the above-described configurations, the upper warp passes under the three upper wefts. Later, it is woven into the upper weft so as to pass over one upper weft.

  According to this configuration, the balance between the surface properties and the durability becomes suitable.

  ADVANTAGE OF THE INVENTION According to this invention, in the papermaking fabric which has a papermaking surface side fabric layer and the running surface side fabric layer connected with the running surface side fabric layer by the self-bonding yarn, the dewatering property (air permeability) and the surface Performance can be improved.

The figure which shows the complete structure | tissue of the papermaking fabric which concerns on 1st Embodiment. Sectional drawing in the surface orthogonal to the weft direction of the papermaking fabric according to the first embodiment. Photograph of the papermaking fabric according to the first embodiment (upper: papermaking surface side, middle: cross section orthogonal to the weft direction, lower: running surface side) Example of cross-sectional views of warp and warp binding yarn (A: comparative example 1, B: comparative example 2C: first embodiment, D: third embodiment) The figure which shows the complete structure | tissue of the papermaking fabric which concerns on 2nd Embodiment. Sectional drawing in the surface orthogonal to the weft direction of the papermaking fabric which concerns on 2nd Embodiment The figure which shows the complete structure | tissue of the papermaking fabric which concerns on 3rd Embodiment. The figure which shows the complete structure | tissue of the papermaking fabric which concerns on 4th Embodiment. The figure which shows the complete structure | tissue of the papermaking fabric which concerns on 5th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 3 and FIG. 4C show a papermaking fabric 1 according to the first embodiment. The papermaking fabric 1 is used as a wire for forming a wet paper from a stock (liquid) in a wire part (wet part) of a paper machine. The papermaking fabric 1 is wound around a roll of a paper machine, and travels according to the rotation of the roll. The surface of the papermaking fabric 1 that comes into contact with the stock and the wet paper is called the papermaking surface, and the surface opposite to the papermaking surface is called the running surface. A stock is placed on the papermaking surface of the papermaking fabric 1, and a wet paper web is formed by dewatering. The papermaking fabric 1 attached to the paper machine has an endless belt-like shape. In the following description, for convenience, the papermaking surface side is referred to as the upper side, and the running surface side is referred to as the lower side. In addition, the directions of “warp” and “weft” mean the machine direction of the paper machine (the length direction of the papermaking fabric 1) and the cross-machine direction (the width direction of the papermaking fabric 1), respectively.

  The papermaking fabric 1 has a structure of a single weft double weave, and has a papermaking surface side fabric layer 2 and a running surface side fabric layer 3. The papermaking surface side fabric layer 2 and the running surface side fabric layer 3 are connected to each other by the self-bonding yarn 4. The texture of the papermaking surface side fabric layer 2 is composed of an upper weft 5, an upper warp 6 woven into the upper weft 5, and a warp binding yarn 4 woven into the upper weft 5. The texture of the running surface side fabric layer 3 is composed of the lower weft 7 and the warp binding yarn 4 woven into the lower weft 7. In addition, the structure of the running surface side fabric layer 3 is not provided with a lower warp that weaves only the lower weft 7 without weaving the upper weft 5. Hereinafter, when both the warp binding yarn 4 and the upper warp 6 are indicated, it is simply referred to as “warp”, and when both the upper weft 5 and the lower weft 7 are indicated, simply referred to as “weft”.

  The structure of the papermaking fabric 1 is constituted by repeating the structure based on a complete structure, and the complete structure includes 48 upper wefts 5, 24 lower wefts 7, four upper warps 6, It is composed of twelve warp binding yarns 4. In FIG. The lower weft 7 is arranged below the odd upper weft 5, and the warp No. The warp yarns 4 ′, 8 ′, 12 ′ and 16 ′ (the warp yarns indicated by numbers with circles) are the upper warp yarns 6, and the other warp yarns are the warp binding yarns 4. In the organization chart, the places marked with “x” are the places where the warp binding yarn 4 or the upper warp yarn 6 weaves the upper weft 5, that is, the warp binding yarn 4 or the upper warp yarn 6 is above the upper weft 5. The places marked with “□” indicate the places where the warp binding yarn 4 weaves the lower weft 7, that is, the places where the warp binding yarn 4 passes below the lower weft 7. The portion indicated by the dot pattern indicates the portion where the warp binding yarn 4 moves between the papermaking surface side fabric layer 2 and the running surface side fabric layer 3.

  The texture of the papermaking surface side fabric layer 2 is 1/3 slant, and the texture of the running surface side fabric layer 3 is 2/2 flat. The upper warp 6 passes over one upper weft 5 and is woven into the upper weft 5 in a repeating unit passing under three upper wefts 5. The warp binding yarn 4 passes through one upper weft 5 and then passes under three upper wefts 5 in the complete design four times, and then the lower lower weft 7 After passing under, passing over one lower weft 7 is repeated eight times.

  Three warp binding yarns 4 (No. (4n + 1) ', (4n + 2)' and (4n + 3) 'warp yarns adjacent to each other, where n is an integer of 0 to 3) and one upper warp yarn 6 (No. . (4n + 4) '), 48 upper wefts 5, and 24 lower wefts 7 form a subunit.

  The three warp binding yarns 4 in each subunit alternately weave the upper weft 5 so as to weave the upper weft 5 like one upper warp 6. For example, no. Looking at the subunits including the warps of Nos. 1 'to 4', 1 ′, No. 2 ′ and No. No. 3 'self-bonding yarns 4 are no. The upper weft 5, No. 1, 5, 9 and 13 No. 17, 21, 25 and 29, upper weft yarn 5; The upper weft yarns 33, 37, 41 and 45 are woven, and the upper weft yarn 5 is woven like one upper warp yarn 6 as a whole. As described above, the three warp binding yarns are each transferred to the running surface side fabric layer 3 after the upper weft 5 is non-continuously woven four times, and the three warp binding yarns in the subunit are provided. No. 4 is No. No. 1 'self-joining yarn 4, No. 1 No. 2 'self binding yarn 4, No. 2 The 3 ′ warp binding yarns 4 are repeatedly woven into the upper weft yarn 5 in this order.

  In each subunit, as long as one warp binding yarn 4 weaves the upper weft 5, the other two warp binding yarns 4 weave the common lower weft 7. For example, no. Looking at the subunits including the warps of Nos. 1 'to 4', In the range where the warp binding yarn 4 of No. 1 'weaves the upper weft 5, the No. 1' No. 2 ′ and 3 ′ warp binding yarns 4 are No. The common lower weft 7 below the upper weft 5 (Nos. 1, 5, 9 and 13) woven into the warp binding yarn 4 of No. 1 'is woven. Similarly, no. In the range where the warp binding yarn 4 of 2 ′ weaves the upper weft 5, the No. No. 1 'and 3' self-bonding yarns 4 are No. 2 ′, the common lower weft 7 below the upper weft 5 (No. 17, 21, 25 and 29) woven into the warp binding yarn 4; In the range in which the warp binding yarn 4 of No. 3 'weaves the upper weft 5, the No. 3' No. 1 'and 2' warp binding yarns 4 are No. The common lower weft 7 below the upper weft 5 (No. 33, 37, 41 and 45) woven into the warp binding yarn 4 of 3 'is woven.

  No. 5'-No. No. 8 'subunit containing warp, no. No. 9 ′ to 12 ′ including warp yarns, The subunits including the warp yarns 13 'to 16' are No. 1'-No. The upper weft 5 is arranged at a position shifted by 14, 24, and 38 with respect to the subunit including the 4 'warp.

  The form of the warp binding yarn 4, the upper weft 5, the upper warp 6, and the lower weft 7 is not particularly limited, but a monofilament single yarn and a twist yarn can be used, and a single yarn is particularly preferable. Further, each of the yarns may be a processed yarn subjected to crimping or bulking, or may be a non-processed yarn. Among these, non-processed yarn is preferred.

  The material forming the warp binding yarn 4, the upper weft 5, the upper warp 6, and the lower weft 7 is not particularly limited, but a polyamide resin and a polyester resin are preferable. As the polyamide resin, an aliphatic polyamide resin is preferable, and further, nylon is preferable. Examples of nylon include 66 nylon, 6 nylon, 12 nylon, 11 nylon, 610 nylon, 612 nylon and the like. These may be used alone or in combination of two or more. The polyester resin is not particularly limited as long as it is a polyester comprising a dicarboxylic acid and a glycol, and may be polyethylene terephthalate (PET), polypropylene terephthalate, polybutylene terephthalate (PBT), polyethylene naphthalate, or the like. These may be used alone or in combination of two or more. The warp binding yarn 4, the upper weft 5, the upper warp 6, and the lower weft 7 may be made of the same material or different materials. Further, each yarn may be composed of a single material, or may be composed of two or more materials having different materials. Further, each yarn may contain an inorganic filler and / or an organic filler. It is preferable that the lower weft 7 that affects wear resistance is thicker than the upper weft 5 that affects surface properties.

  The operation and effect of the papermaking fabric 1 will be described. Generally, in the replacement part where the warp binding yarn 4 moves between the papermaking surface side fabric layer 2 and the running surface side fabric layer 3, the warp binding yarn 4 increases inside the papermaking fabric 1. The dehydration direction flowing from the papermaking surface side to the running surface side is multi-directional (random dehydration), as compared with a portion where no replacement is made. In the papermaking woven fabric 1, the warp binding yarn 4 reduces the ratio of the replacement portion of the warp binding yarn by weaving the upper weft 5 discontinuously four times, and the uniform and stable dewatering portion The percentage is increasing. Therefore, the dewatering property (air permeability) of the papermaking fabric 1 is improved.

  FIG. 4A shows an example of the warp binding yarn 4 ′ in the subunit according to the invention described in Patent Document 1, and FIG. 4B shows the upper warp yarn 6 ″ according to the invention described in Patent Document 2. FIG. 4C shows an example of the warp binding yarn 4 "and the lower warp yarn 8" (see FIG. 14 of the same document), and FIG. 4C shows the warp self-joining in the sub-unit in the papermaking fabric 1 according to the present embodiment. An example of the binding yarn 4 and the upper warp 6. In a subunit including four warps, three adjacent ones among them are the warp binding yarns 4, and one is the upper warp 6, that is, By arranging the warp having no binding portion on the papermaking surface side fabric layer 2, the uniformity of the papermaking fabric 1 is increased as compared with the structure of Comparative Example 1 shown in FIG. Further, in the configuration of Comparative Example 2 shown in Fig. 4B, the warp binding yarn 4 "comes close to the papermaking side and the upper weft yarn (shown in FIG. 4B). ) Is incorporated, but the running surface side is not determined. Dehydration is slowed by the presence of the lower warp 8 ". In addition, random dehydration can be achieved in the replacement part of the warp binding yarn 4", but it is uniform. And it is difficult to obtain uniform dehydration. In this embodiment, since one warp binding yarn 4 in the subunit is sequentially replaced while weaving the upper weft 5 a plurality of times, the other two yarns on the running surface side as shown in FIG. Since it is easy to position on the self-joining binding yarn 4, it tends to be uniform. Since the distance between the warp binding yarn 4 and the upper warp yarn 6 located on the papermaking surface side also approaches a constant value, a uniform surface can be easily formed, and stable dehydration with a small difference can be obtained.

  Further, the configuration in which the warp binding yarn 4 weaves the lower weft 7 is a configuration in which the three warp binding yarns 4 in the sub-unit are interleaved to weave the common lower weft 7 as a pair of two. As shown in FIG. 3, the two warp binding yarns 4 in the subunits in the running surface side fabric layer 3 are in close contact with each other, and a space is generated between the adjacent subunits, thereby providing stable dehydration. Can be obtained.

  In each section extending in the warp direction separated by the replacement portion, three warp binding yarns 4 in the subunit form a set, one functions as an upper warp yarn 6, and the other two lower warp yarns 6. Functions as a warp. For this reason, not only the papermaking surface side fabric layer 2 but also the running surface side fabric layer 3 becomes denser, and it approaches a state where one warp is always arranged on the papermaking side and two warps are arranged on the running surface side. As a result, uniformity and stability are improved, and dehydration, surface properties and dimensional stability are improved. Further, in the configuration of Comparative Example 2 shown in FIG. 4B, there is a set of an upper warp 6 "and a lower warp 8" having no binding portion, and in this set, the adhesion between the papermaking surface side and the running surface side can be improved. Absent. On the other hand, in the present embodiment, there is no lower warp yarn, and the warp binding yarns 4 are present in all the subunits, so that the papermaking surface side and the running surface side can be brought into close contact. As a result, the internal wear can be suppressed and the net thickness can be reduced uniformly, so that the water content of the sheet can be uniformly and quickly discharged through the wire.

  Next, a papermaking fabric 11 according to a second embodiment of the present invention will be described with reference to FIGS. In the description, the configurations common to the first embodiment are omitted from description, and are denoted by the same reference numerals. The fabric 11 for papermaking according to the second embodiment is different from the first embodiment in the configuration of the warp binding yarn 14.

  The papermaking fabric 11 has a papermaking surface side fabric layer 12 and a running surface side fabric layer 13 connected to the papermaking surface side fabric layer 12 by a warp binding yarn 14. The texture of the papermaking side fabric layer 12 is composed of an upper weft 5, an upper warp 6 woven into the upper weft 5, and a warp binding yarn 14 woven into the upper weft 5. The structure of the running surface side fabric layer 13 is composed of the lower weft 7 and the warp binding yarn 14 woven into the lower weft 7.

  The three warp binding yarns 14 in each sub-unit are the same as in the first embodiment in that the upper weft 5 is woven as a single upper warp yarn 6, but each warp binding yarn 14 The mode in which the binding yarn 14 weaves the upper weft yarn 5 and the lower weft yarn 7 is different from the first embodiment. Hereinafter, No. A subunit including 1 'to 4' warps will be described as an example. No. 1 ′, No. 2 ′ and No. No. 3 'self-bonding yarns 4 are no. The upper weft 5, No. 1, 5 and 9 No. 13, 17, 21, 37, 41, and 45, and the upper weft 5; The upper weft yarns 5, 25, and 33 are woven, and the upper weft yarn 5 is woven like one upper warp yarn 6 as a whole. In this way, the three warp binding yarns move to the running surface side fabric layer 13 after weaving the upper weft 5 three times in a discontinuous manner. Therefore, the three self-bonding yarns 14 in the subunit are no. No. 1 ', self-bonding yarn 14, no. No. 2 ', self-joining yarn 14, no. No. 3 ', self-joining yarn 14; The 2 'warp binding yarns 14 are repeatedly woven into the upper weft yarn 5 in this order. As described above, No. 1 'and No. 1 No. 3 ′ warp binding yarn 14 alternates between the papermaking side fabric layer 12 and the running surface side fabric layer 13 once. The 2 ′ warp binding yarn 14 alternates between the papermaking surface side fabric layer 12 and the running surface side fabric layer 13 twice.

  No. 5'-No. No. 8 'subunit containing warp, no. No. 9 ′ to 12 ′ including warp yarns, The subunits including the warp yarns 13 'to 16' are No. 1'-No. The upper weft 5 is arranged at a position shifted by 18, 24, and 42 with respect to the subunit including the 4 'warp.

  Even with such a configuration, the same operation and effect as those of the first embodiment are exhibited.

  Next, the papermaking fabric 21 according to the third embodiment will be described with reference to FIGS. In the description, the configurations common to the first embodiment are omitted from description, and are denoted by the same reference numerals. In the third embodiment, the order of the upper warp yarns 6 and the warp binding yarns 4 arranged in the weft direction is different from the first embodiment.

  As shown in FIG. 1, in the papermaking fabric 1 according to the first embodiment, the upper warp yarn 6 and the warp binding yarn 4 have one upper warp yarn 6 and three warp yarns toward one side in the weft direction. The self-bonding yarns 4 are repeatedly arranged in this order. That is, in two adjacent subunits, the upper warp yarn 6 of one subunit is adjacent to the warp binding yarn 4 of the other subunit. However, in the papermaking fabric 21 according to the third embodiment, the upper warp yarn 6 and the warp binding yarn 4 have one upper warp yarn 6 and six warp binding yarns 4 toward one side in the weft direction. And one upper warp in order. That is, in two adjacent subunits, the upper warp yarn 6 of one subunit is adjacent to the upper warp yarn 6 of the other subunit, or the warp binding yarn 4 of one subunit is Is adjacent to the self-bonding yarn 4 of the subunit. Therefore, in FIG. The warp yarns 4 ', 5', 12 'and 13' are the upper warp yarns 6 and the other warp yarns are the warp binding yarns 4.

  In the first embodiment, as shown in FIG. 4 (C), when a triangle that inscribes three warp binding yarns 4 in each subunit in a cross section orthogonal to the warp direction is drawn, One side becomes an equilateral triangle having a lower side. Since the upper one warp binding yarn 4 is arranged between the lower two warp binding yarns 4, the papermaking fabric 1 is relatively thin. Further, since one upper warp yarn 6 is arranged between three warp binding yarns 4 and three warp binding yarns 4 adjacent thereto, a constant spacing is provided on the running surface side. There is a gap.

  On the other hand, in the third embodiment, as shown in FIG. 4 (D), a triangle which inscribes three warp binding yarns 4 in each subunit in a cross section orthogonal to the warp direction is drawn. In general, it is a right-angled isosceles triangle with the hypotenuse facing the upper warp yarn 6 in the subunit. In each subunit, when one upper warp 6 is combined with three warp binding yarns 4, the arrangement is relatively close to the conventional design shown in FIG. Although the papermaking fabric 21 according to the third embodiment is thicker than the first embodiment, the dewatering property (air permeability) is improved. In addition, since the six warp binding yarns 4 are densely packed, the adhesion between the papermaking side fabric layer 2 and the running surface side fabric layer 3 is increased.

  With reference to Drawing 8 and Drawing 9, papermaking textiles 31 and 41 concerning a 4th embodiment and a 5th embodiment are explained. In the description, the configurations common to the first embodiment are omitted from description, and are denoted by the same reference numerals. The fourth embodiment and the fifth embodiment are different from the first embodiment in the number of times that the three warp binding yarns 34 and 44 in the subunit weave the upper weft 5 discontinuously, respectively.

  In the papermaking fabric 31 according to the fourth embodiment shown in FIG. 8, the three warp binding yarns 34 in the subunit each have the upper weft 5 woven twice discontinuously. For this reason, the number of the wefts constituting the complete design is smaller than in the first embodiment, and the complete design of the papermaking fabric 31 is 24 upper wefts 5, 12 lower wefts 7, and 4 upper warps. 6 and 12 self-bonding yarns 34.

  For example, no. Looking at the subunits including the warps of Nos. 1 'to 4', 1 ′, No. 2 ′ and No. Nos. 3 'and 34' respectively. No. 1 and No. 5 upper weft 5, No. 9 and 13 upper weft 5, and no. The upper weft yarns 17 and 21 are woven, and the upper weft yarn 5 is woven like one upper warp yarn 6 as a whole. In this way, the three warp binding yarns 34 are each moved to the running surface side after weaving the upper weft 5 discontinuously twice, and the three warp binding yarns 34 in the subunit are , No. No. 1 ', self-bonding yarn 34, No. 1; No. 2 'warp binding yarn 34, no. The 3 'warp binding yarns 34 are repeatedly woven into the upper weft yarn 5 in this order.

  No. 5'-No. No. 8 'subunit containing warp, no. No. 9 ′ to 12 ′ including warp yarns, The subunits including the warp yarns 13 'to 16' are No. 1'-No. The upper weft 5 is arranged at a position shifted by 14, 4, and 18 with respect to the subunit including the 4 'warp.

  In the papermaking fabric 41 according to the fifth embodiment shown in FIG. 9, the three warp binding yarns 44 in the subunit weave the upper weft 5 non-continuously five times. For this reason, the number of wefts constituting the complete design is larger than that of the first embodiment, and the complete design of the papermaking fabric 41 is 60 upper wefts 5, 30 lower wefts 7, and 4 upper warps. 6 and twelve warp binding yarns 44.

  For example, no. Looking at the subunits including the warps of Nos. 1 'to 4', 1 ′, No. 2 ′ and No. Nos. 3 'and 44' respectively. The upper weft 5, No. 1, 5, 9, 13 and 17 No. 21, 25, 29, 33 and 37 upper weft 5, and no. The upper weft yarns 41, 45, 49, 53, and 57 are woven, and the upper weft yarn 5 is woven as one upper warp yarn 6 as a whole. In this way, the three warp binding yarns 44 are each moved to the running surface side after weaving the upper weft 5 discontinuously five times, and the three warp binding yarns 44 in the subunit are , No. No. 1 'self-bonding yarn 44, No. 1 No. 2 'self binding yarn 44, no. The 3 ′ warp binding yarns 44 are repeatedly woven into the upper weft yarn 5 in this order.

  No. 5'-No. No. 8 'subunit containing warp, no. No. 9 ′ to 12 ′ including warp yarns, The subunits including the warp yarns 13 'to 16' are No. 1'-No. The upper weft 5 is disposed at positions shifted by 6, 20, and 46 with respect to the subunit including the 4 'warp.

  In the first to fifth embodiments, the number of times that the self-joining binding yarns 4, 14, 34, and 44 discontinuously weave the upper weft yarn 5 is four, three, four, two, and five times, respectively. is there. By setting the number of times that the warp binding yarns 4, 14, 34, and 44 discontinuously weave the upper weft 5 two times or more, and preferably three times or more, the ratio of the replacement portion is reduced and the dewatering property is reduced. improves. By setting the number of times to five or less, the adhesion between the papermaking surface side fabric layers 2 and 12 and the running surface side fabric layers 3 and 13 is ensured.

  Although the description of the specific embodiments has been completed above, the present invention can be widely modified without being limited to the above embodiments. The upper warp may be woven into the upper weft in a repeating unit passing under one or two or more upper wefts after passing over the one upper weft. The structure of the running surface side fabric layer may be a structure other than 2/2 flat as long as the two warp binding yarns in the subunit weave the common lower weft. The arrangement in the weft direction of the warp binding yarn and the upper warp yarn of the third embodiment (the configuration in which the warp Nos. 4, 5, 12, and 13 become the upper warp yarns, and the other warp yarns become the warp self-bonding yarns) It may be applied to the second, fourth or fifth embodiment. Further, the configuration of the replacement of the warp binding yarns in the second embodiment (the configuration in which the warp binding yarn of warp No. 2 is woven into the upper weft more than the warp binding yarns of warp Nos. 1 and 3) ) May be applied to the first and third to fifth embodiments.

1, 11, 21, 31, 41: Papermaking fabric 2, 12: Papermaking side fabric layer 3, 13: Running surface side fabric layer 4, 14, 34, 44: Self-bonding yarn 5: Upper weft 6: Upper warp 7: Lower weft

Claims (8)

A papermaking fabric having a papermaking surface side fabric layer and a running surface side fabric layer connected to the papermaking side fabric layer by a warp binding yarn,
The texture of the papermaking surface side fabric layer has an upper weft, an upper warp woven into the upper weft, and the warp binding yarn woven into the upper weft,
The texture of the running surface side fabric layer has a lower weft, and the warp binding yarn woven into the lower weft,
A sub warp is formed by three warp binding yarns adjacent to each other, one upper warp adjacent to the three warp binding yarns, a plurality of upper wefts, and a plurality of lower wefts. A unit is formed,
The upper warp, after passing over one upper weft, is woven into the upper weft in a repeating unit passing under two or more of the upper wefts,
The three warp binding yarns in each of the subunits alternately form the texture of the papermaking surface side fabric layer along the warp direction, thereby forming the upper weft like one upper warp. Weaving
In each of the subunits, in the range of the warp direction in which one warp binding yarn weaves the upper weft, the other two warp binding yarns weave the common lower weft and three The warp binding yarn according to any one of claims 1 to 3, wherein the upper weft is discontinuously woven into the running surface side fabric layer two or more times at the same time, and then moves to the running surface side fabric layer.   The structure of the papermaking surface side fabric layer is composed of only the upper weft, the upper warp and the warp binding yarn, and the structure of the running surface side fabric layer is configured only of the lower weft and the warp binding yarn. The papermaking fabric according to claim 1, wherein   3. The papermaking machine according to claim 1, wherein the warp binding yarn moves to the running surface side fabric layer after weaving the upper weft in a discontinuous manner three to five times. 4. For textiles.   The warp binding yarn in the subunit includes a first warp binding yarn, a second warp binding yarn, and a third warp binding yarn, and the first warp binding yarn, the second warp binding yarn, The papermaking fabric according to any one of claims 1 to 3, wherein the warp binding yarn and the third warp binding yarn are repeatedly woven into the upper weft.   The warp binding yarn in the subunit includes a first warp binding yarn, a second warp binding yarn, and a third warp binding yarn, and the first warp binding yarn, the second warp binding yarn, The warp binding yarn, the third warp binding yarn, and the second warp binding yarn are repeatedly woven into the upper weft in this order, and the second warp binding yarn is joined to the first and third warp yarns. The papermaking woven fabric according to any one of claims 1 to 3, wherein the woven fabric is woven into the upper weft more than the binding yarn.   2. The upper warp and the warp binding yarn are arranged repeatedly in the order of one upper warp and three warp binding yarns toward one side in a weft direction. The papermaking fabric according to any one of claims 1 to 5.   The upper warp and the warp binding yarn are repeatedly arranged in the order of one upper warp, six warp binding yarns and one upper warp toward one side in the weft direction. The papermaking fabric according to any one of claims 1 to 5, characterized in that:   The upper warp is woven into the upper weft so as to pass under one of the upper wefts after passing under the three upper wefts. The papermaking fabric according to any one of the preceding claims.