JP2010150678A - Paper making felt and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper making felt that suppresses yarn draw to make intervals of wefts nonuniform in a base fabric of a multilayer structure, is integrally woven in the multilayer structure, increases an man-hour like a laminate structure and is easily produced and a method for producing the same. <P>SOLUTION: The base fabric 2 includes the multilayer structure in which a plurality of ground warps 4 and 5 composed of monofilament yarns are piled in a thickness direction, wefts 6 and 7 individually and separately entangled with each of the ground warps are piled in the thickness direction, single-woven fabric layers 8 and 9 are laminated, and a plurality of weft-regulating warps 12 and 13 that are entangled with wefts in a manner more largely bending than the ground warps, regulate the displacements of the wefts are woven at fixed intervals. In particular, the base fabric forms a texture structure in which a single-woven piled part and a multilayer woven part by wefts are present together. The weft-regulating warps are woven in a single-woven piled state. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a papermaking felt in which a batt fiber layer is integrated with a base fabric and a method for producing the same.

  In the felt for papermaking used in the wet paper pressing process, a base fabric having a structure in which warp yarns are arranged in multiple layers may be employed so as to increase the amount of voids in order to ensure high water squeezability. As such a multi-structure base fabric, a laminate structure in which a plurality of base fabrics separately woven by a loom are superposed or a multi-woven structure having a multi-weave structure woven by a loom is known.

In a multi-woven structure base fabric, a structure in which each weft is entangled with all of the warp yarns arranged in multiple, especially a double weave structure in which each weft is entangled with both warp yarns arranged in double, is common. (See Patent Documents 1 and 2). In addition, a laminated base fabric generally has a structure in which two single woven fabrics are superposed or a structure in which a single woven fabric and a double woven fabric are superposed (see Patent Documents 3 and 4). In addition, a structure in which a narrow belt-shaped woven fabric is spirally wound is also known (see Patent Document 5).
Japanese Patent Publication No. 5-47675 Japanese Patent Laid-Open No. 9-31881 JP 2000-256984 A Japanese Patent Laid-Open No. 2005-200819 JP 2000-80584 A

  However, in the base fabric of the multiple woven structure in which each weft is entangled with all of the above-mentioned multiple warps, there is a disadvantage that the void amount does not increase for the multiple warps arranged, and the compression acting during use. It has the inconvenience of compression resistance that is hard to be crushed against force, and low compression recovery that restores the original state when the compression force is lost, and has a large void volume and excellent compression resistance and compression recovery From the viewpoint of ensuring the above, a laminated structure is more advantageous than a multi-woven structure, and a laminated structure in which a single woven fabric of plain weaves is particularly desirable.

  However, in the case of plain weaving, especially when the warp is made of a monofilament yarn and the weft is made of a monofilament yarn or a twisted yarn of a filament, the crimp due to the intersection with the weft yarn is difficult to come into contact with the warp yarn during weaving, and the weft yarn is easily displaced. Is likely to be non-uniform, that is, so-called yarn slippage. This close to the thread causes unevenness in the opening of the base fabric and decreases the uniformity of the physical properties of the felt, such as water permeability. It is desirable to avoid it as much as possible because it causes inconvenience.

  In addition, in the base fabric of the laminate structure, it is necessary to weave a plurality of base fabrics with a loom at the time of manufacture, and it is necessary to separately heat set the base fabric. They are joined by the needling process that integrates them by needling, but special adjustments are necessary so that problems such as slippage do not occur in multiple woven fabrics, which increases man-hours and manufacturing costs. There is a problem of rising, and a structure that can be woven in one piece while having the characteristics of a laminate structure is desired.

  The present invention has been devised in order to solve such problems of the prior art, and its main purpose is to suppress yarn slippage in which the weft spacing is not uniform in a multi-layer base fabric. Is to provide a felt for papermaking and a method for producing the same. It is another object of the present invention to provide a felt for papermaking which is woven integrally with a multilayer structure, does not increase the number of steps as in a laminated structure, and is easy to manufacture, and a method for manufacturing the same.

  In order to solve such a problem, a papermaking felt according to the present invention is a papermaking felt in which a bat fiber layer is integrated with a base fabric as shown in claim 1, wherein the base fabric is a monofilament yarn. A plurality of ground warp yarns are overlapped in the thickness direction, and weft yarns individually entangled with each of the ground warp yarns have a multilayer structure in which a single weaving fabric layer is laminated, A plurality of weft-regulating warp yarns that are entangled with the weft yarns and regulate the displacement of the weft yarns in a largely bent manner are woven at predetermined intervals.

  According to this, since the displacement of the weft is regulated by the weft regulating warp, the weft spacing can be kept uniform to prevent the weft deviation.

  In the papermaking felt, as shown in claim 2, the base fabric includes both a single woven superposition portion in which the single woven fabric layers are superposed and the ground warp yarns constituting the woven fabric layers, respectively. It can be set as the structure which makes | forms the structure | tissue structure in which the multiple woven part in which the weft was woven so that it might be entangled with was mixed.

  According to this, since the fabric layers are integrated with each other by the wefts woven so as to be entangled with both the warp yarns constituting the respective fabric layers, the fabric layers are not separated from each other in the manufacturing process. As in the case of a laminate structure in which base fabrics woven on each other are stacked, special labor such as adjustment of the shift between the base fabrics is not required, and manufacturing is facilitated.

  In the papermaking felt, as shown in claim 3, the warp regulating warp is woven in a single weaving polymerization state in which the wefts constituting the fabric layers are individually entangled and overlapped in the thickness direction. It can be configured.

  According to this, the weft-regulating warp of the fabric layer on the paper making side floats and sinks on the surface of the base fabric on the paper-making surface side, and the weft-regulating warp of the fabric layer on the running surface side is on the running surface side of the base fabric Therefore, if weft weft control warp yarns are woven at the required yarn density, additional warps fill the gaps between the adjacent ground warps on the surface of the base fabric. The smoothness of the paper can be improved, and the surface properties of the paper can be improved. Furthermore, since the fibers of the batt fiber layer are easily entangled with the weft regulating warp, hair loss of the batt fiber layer can be suppressed.

  In this case, it is preferable that the weft regulating warp is woven so as to form a plain weave structure with respect to the weft. According to this, the pairing of the wefts can be reliably prevented, and the effect of keeping the weft yarns uniform can be further enhanced.

  In the papermaking felt, as shown in claim 4, the weft regulating warp overlapping in the thickness direction may be woven in a symmetrical structure.

  According to this, the warp yarns for weft regulation overlapping in the thickness direction are in contact with each other, so that the yarn of the other fabric layer is fitted between the yarns of one fabric layer and the base fabric is suppressed from being thinned. Since it is difficult to be crushed, an appropriate void amount can be maintained over a long period of time.

  In the papermaking felt, as shown in claim 5, the weft regulating warp may be woven in a multiple weaving state in which both the wefts constituting the fabric layer are intertwined.

  According to this, since the fabric layers are integrated with each other by the weft-regulating warp, the fabric layers are not separated from each other during the manufacturing process. Therefore, like the laminated structure in which the separately woven base fabrics are stacked, Special labor such as adjusting the displacement between the cloths is not required, and manufacturing is facilitated. In addition, since multiple weaving portions where the fabric layers are integrated with each other by wefts can be reduced or eliminated, the number of single-weaving polymerized portions can be increased, and thus characteristics closer to a base fabric having a laminate structure can be obtained.

  In this case, for example, in a two-layer structure in which two ground warps overlap in the thickness direction, the weft regulating warp goes back and forth between the outside of the weft on the papermaking side and the outside of the weft on the running side. It is preferable that the woven fabric is woven so as to pass between two wefts by one weft. According to this, it is possible to avoid the extreme bending of the weft regulating warp and to increase the effect of keeping the spacing between the wefts evenly because the wefts are entangled with the wefts to restrict the wefts.

  In addition, when weaving ground warp yarn as a driving yarn on a loom and weft yarn as a warp yarn on a loom, the weaving position of the wefts constituting the multi-weaving portion is the number of twill frames through which the warp yarns serving as weft yarns are passed, etc. Therefore, the number of wefts constituting the multi-weaving portion cannot be made extremely smaller than the wefts constituting the single-weave polymerized portion. For this reason, the ratio of the multiple woven portion cannot be reduced so much with respect to the single woven superposed portion, and there is a limit in obtaining the characteristics approximate to the laminate structure base fabric. On the other hand, the weaving position of the weft regulating warp can be set relatively freely by changing the driving position of the driving thread that becomes the weft regulating warp. For this reason, the ratio of the weft-regulating warp to the ground warp can be significantly reduced within the range in which the effect of keeping the spacing of the wefts uniform is not impaired, and characteristics closer to the base fabric of the laminate structure can be obtained. .

  In addition, the multiple weaving state in which both the weft regulating warp yarns that are individually entangled with the weft yarns constituting the fabric layers and overlapped in the thickness direction are entangled with each other and the weft yarns for weft yarn constituting each of the fabric layers. A configuration in which weft control warp yarns woven together is also possible.

  In the papermaking felt, as shown in claim 6, the weft regulating warp may be woven in place of a part of the ground warp.

  According to this, the non-uniformity of the base fabric structure due to the weaving of the warp yarn for warp control can be reduced.

  In the papermaking felt, as shown in claim 7, the ground warp yarn can be configured to form a loop for joining the end portion by folding back at the end portion in the length direction.

  In a seam felt having a loop for joining the end portions, it is usually necessary to use a relatively thick monofilament yarn for the warp forming the loop in order to ensure the strength of the seam portion, and for the convenience of loop engagement and core wire insertion work. In such a case, the weft yarn is easy to slip and the warp yarn is not easily crimped, so that the yarn slip tends to be noticeable. However, by adopting the configuration as described above, these problems can be effectively solved. Can do.

  A papermaking felt manufacturing method according to the present invention is a manufacturing method for papermaking felt in which a bat fiber layer is integrated with a base fabric as shown in claim 8, wherein the base fabric is made of monofilament yarn. Weaving so as to have a multilayer structure in which a plurality of ground warp yarns are overlapped in the thickness direction and weft yarns individually entangled with each of the ground warp yarns are overlapped in the thickness direction so that a single woven fabric layer is laminated, A warp yarn for weft regulation made of a soluble yarn material that can be dissolved in a predetermined solvent is woven so as to be entangled with the weft yarn in such a manner that it is bent larger than the ground warp yarn and the displacement of the weft yarn is regulated, and batt fiber by needling After the layers were integrated, the weft regulating warp was eluted and removed in the liquid.

  According to this, since there is no weft-regulating warp in the finished felt, the uniformity of the entire base fabric can be improved.

  If the weft regulating warp is removed after the needling process, the weft regulating warp exists until the needling process, so the weft deviation is reliably regulated and the weft spacing is kept uniform. As a result, the thread slippage can be prevented. Then, after the needling step, the fibers of the bat fiber layer are entangled with the base fabric and the displacement of the weft is restricted, so that the weft is not displaced regardless of the presence or absence of the weft restriction warp.

  In this case, the weft-regulating warp is preferably made of a water-soluble polymer material from the viewpoint of ease of handling, and the weft-regulating warp is eluted and removed in the washing water in the washing step performed after the needling step. It is good to do. In addition, the warp yarn for weft control can be made of a polymer material that can be dissolved in an organic solvent, and the organic solvent is chemically stable and brittle with respect to felt constituent materials (polyamide, wool, etc.). Use those that do not adversely affect the system.

  As described above, according to the present invention, it is possible to prevent the weft from becoming uneven in the weft intervals, to prevent the uniformity of felt physical properties such as water permeability, and to be easily damaged during needling. Inconvenience such as becoming can be avoided. Then, a structure structure in which a single weaving polymer part and a multiple weaving part using wefts are mixed, or by weaving weft regulating warp in a multi-weaving state, the fabric layers are integrated with each other and the fabric layers are separated from each other in the manufacturing process. Therefore, there is no need for special troubles such as adjusting the displacement between the base fabrics as in the case of a laminate structure in which base fabrics that are separately woven are stacked, and manufacturing is facilitated.

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

<First Embodiment>
FIG. 1 is a schematic sectional view in the length direction showing an example of the felt according to the present invention. FIG. 2 is a schematic cross-sectional view in the width direction of the base fabric shown in FIG.

  As shown in FIG. 1, the felt 1 has an endless shape, and a bat fiber layer 3 is integrated with a base fabric 2 by needling. The base fabric 2 is on the upper side (the papermaking surface 1a side). The ground warp 4 and the lower (running surface 1b side) ground warp 5 overlap in the thickness direction, and the wefts 6 and 7 individually entangled with the upper and lower ground warps 4 and 5 overlap in the thickness direction. In addition, it has a multi-layer structure in which single woven fabric layers 8 and 9 are laminated, and a characteristic approximate to that of a laminate structure in which single woven base fabrics woven separately are stacked can be obtained.

  The base fabric 2 is woven so as to be entangled with both the upper and lower ground warps 4 and 5 in addition to the wefts 6 and 7 woven so as to be individually entangled with the upper and lower ground warps 4 and 5. The weft 11 is provided, and has a structure in which a single weaving superposed portion formed by the upper and lower wefts 6 and 7 overlapping in the thickness direction and a double weave portion formed by the weft 11 are mixed.

  By mixing the double woven parts in this way, the upper and lower fabric layers 8 and 9 are integrated with each other by the wefts 11 entangled with both the upper and lower ground warps 4 and 5, so that the fabric layers 8 and 9 are manufactured in the manufacturing process. Since they are not separated from each other, special labor such as adjusting the displacement between the base fabrics is not required as in the laminate structure, and the manufacturing is facilitated.

  In addition to the ground warp yarns 4 and 5, the base fabric 2 has a weft regulating warp yarn that is entangled with the weft yarns 6 and 7 in a manner that bends larger than the ground warp yarns 4 and 5 and regulates the displacement of the weft yarns 6 and 7. 12 and 13 are interwoven. In particular, here, the weft-regulating warp yarns 12 and 13 are woven in a single-weave polymerization state in which the weft yarns 6 and 7 constituting the upper and lower fabric layers 8 and 9 are individually entangled and overlapped in the thickness direction.

  The weft regulating warp yarns 12 and 13 are woven so as to form a plain weave structure with respect to the weft yarns 6 and 7. Further, as shown in FIG. 2, the weft regulating warp yarns 12 and 13 are woven so as to be vertically symmetrical with each other adjacent in the width direction. Thereby, pairing of the wefts 6 and 7 can be reliably prevented, and the distance between the wefts 6 and 7 can be kept uniform. The weft-regulating warp yarns 12 and 13 do not need to have the same yarn density as the ground warp yarns 4 and 5 in order to keep the spacing between the weft yarns 6 and 7 uniform, and may be woven at regular intervals in the width direction. However, the number ratio between the ground warp yarns 4 and 5 and the weft-regulating warp yarns 12 and 13 is preferably in the range of 1: 1 to 20: 1.

  In addition, when the weft regulating warp yarns 12 and 13 are woven at a relatively small interval, the weft regulating warp yarns 12 and 13 fill the gaps between the ground warp yarns 4 and 5 adjacent in the lateral direction on the surface of the base fabric 2. The smoothness of the surface of the cloth 2 is improved, and the surface property of the paper can be improved. Furthermore, the fibers forming the bat fiber layer 3 are entangled with the warp yarns 12 and 13 in addition to the ground warp yarns 4 and 5 and the weft yarns 6 and 7, so that the fibers of the bat fiber layer 3 are firmly attached to the base fabric 2. Since it is held, hair loss of the bat fiber layer 3 can be suppressed.

  Further, as shown in FIG. 1, the weft regulating warp yarns 12 and 13 are woven in a symmetrical structure, that is, the entangled form of the weft regulating warp yarns 12 and 13 with respect to the weft yarns 6 and 7 is vertically symmetrical. In the position where the upper weft regulating warp 12 passes above the weft 6, the lower weft regulating warp 13 passes below the weft 7 and the upper weft regulating warp 12 is below the weft 6. The lower weft regulating warp 13 passes over the weft 7, and the upper and lower weft regulating warps 12 and 13 come into contact with each other. Thereby, it can suppress that the other thread | yarn of the textile layers 8 * 9 fits between one thread | yarn of the textile layers 8 * 9, and the base fabric 2 becomes thin.

  As the ground warp yarns 4 and 5, monofilament yarns composed of one filament are used. As the weft yarns 6, 7 and 11, a monofilament yarn or a twisted yarn obtained by twisting a plurality of filaments is used.

  The weft-regulating warp yarns 12 and 13 can be monofilament yarns. However, an aggregate yarn material in which one or both of staples and filaments are assembled together, for example, a twisted yarn obtained by twisting a plurality of filaments, a plurality of yarns A multifilament yarn in which filaments are bundled, a spun yarn obtained by spinning staples, a twisted yarn of a multifilament yarn and another yarn (for example, a monofilament yarn or a spun yarn), and the like are also possible. When such an aggregate yarn material is used for the weft regulating warp yarns 12 and 13, the fibers forming the bat fiber layer 3 are easily entangled, which is effective in suppressing the hair loss of the bat fiber layer 3.

  The weft regulating warp yarns 12 and 13 may be made of a thread material thinner than the ground warp yarns 4 and 5. For example, when the weft regulating warp yarns 12 and 13 are monofilament yarns, 2 of the ground warp yarns 4 and 5 are used. A thread diameter of / 3 or less is suitable. Further, when the weft regulating warp yarns 12 and 13 are twisted filaments, the number of filaments having a diameter of 0.1 to 0.3 mm is preferably 4 or less, and when a multifilament yarn is used, 300 to 2000 d, In the case of spun yarn, 300 to 2000d, and in the case of twisted yarn of multifilament yarn and other yarns, 300 to 2000d is preferable.

  FIG. 3 is a schematic view showing a procedure for manufacturing the base fabric shown in FIG. Here, as shown in FIG. 3 (A), the base fabric 2 uses the ground warp yarns 4 and 5 on the paper machine as driving yarns on the loom, and the weft yarns 6, 7, and 11 on the paper machine are adjusted on the loom. The warp is woven in an endless manner by bag weaving. Further, as shown in FIG. 3B, the weft regulating warp yarns 12 and 13 are also driven on the loom like the ground warp yarns 4 and 5, and the ground warp yarns 4 and 5 and the weft regulating warp yarns. By operating the twill frame through which the warp yarns to become the weft yarns 6 and 7 are operated so that the yarns 12 and 13 are woven in the required structure, the respective driven yarns to become the ground warp yarns 4 and 5 and the warp yarns 12 and 13 for controlling the weft Is driven in. In addition, the ear | edge parts 31 and 32 are hold | maintained by the tomahawk 33 and the temple 34, and this can stabilize the width | variety at the time of weaving.

<Second Embodiment>
FIG. 4 is a schematic sectional view in the length direction showing another example of the felt according to the present invention. FIG. 5 is a schematic cross-sectional view in the width direction of the base fabric shown in FIG. 4.

  In the felt 41, as shown in FIG. 4, as in the first embodiment (see FIGS. 1 and 2), the weft regulating warp for regulating the displacement of the wefts 43 and 44 on the base fabric 42 is used. In this example, the weft regulating warp yarn 45 is woven in a multi-woven state in which both the weft yarns 43 and 44 constituting the fabric layers 46 and 47 are intertwined. Further, there is no double weaving portion in the above example, and all the wefts 43 and 44 are woven so as to be individually entangled with the upper and lower ground warp yarns 4 and 5, respectively.

  The weft regulating warp 45 passes between the two wefts 43 and 44 in the length direction by one weft while moving between the upper side of the upper weft 43 and the lower side of the lower weft 44. As a result, weaving of the weft regulating warp yarn 45 is prevented from becoming excessive, and an opportunity to regulate the displacement of the weft yarns 43 and 44 by being entangled with the weft yarns 43 and 44 is increased. Further, as shown in FIG. 5, the weft regulating warp yarns 45 are woven so as to be vertically symmetrical with each other adjacent in the width direction, whereby all the wefts 43 and 44 are uniformly regulated. . For this reason, pairing of the wefts 43 and 44 can be reliably prevented, and the distance between the wefts 43 and 44 can be kept uniform.

  In this configuration, since the fabric layers 46 and 47 are integrated with each other by the weft regulating warp 45, it is necessary to provide a double weaving portion that integrates the fabric layers 8 and 9 with the weft 11 as in the above example. However, by using a single-weave polymerized part, it is possible to obtain characteristics closer to that of a base fabric having a laminate structure. In addition, it is also possible to provide a double woven part as in the above example.

  By the way, as shown in FIG. 3, when weaving the ground warp yarns 4 and 5 on the weaving machine and weft yarns 6, 7 and 11 on the loom as warping yarns, the weft yarns 11 constituting the double weaving portion Since the weaving position is limited by the number of twill frames through which the warp yarns are passed, the number of wefts 11 constituting the double weaving portion should be extremely less than the weft yarns 6 and 7 constituting the single weaving polymerized portion. I can't. For this reason, the ratio of the multiple woven portion cannot be reduced so much with respect to the single woven superposed portion, and there is a limit in obtaining the characteristics approximate to the laminate structure base fabric.

  On the other hand, the weaving positions of the weft regulating warp threads 12 and 13 can be set relatively freely by changing the driving position of the driving thread. For this reason, the ratio of the weft regulating warp yarns 12 and 13 to the ground warp yarns 4 and 5 can be greatly reduced within the range in which the effect of maintaining the uniform spacing of the weft yarns 6, 7, and 11 is not impaired. Properties closer to the base fabric can be obtained.

  Therefore, in order to obtain characteristics approximating that of a base fabric having a laminate structure, the upper and lower fabric layers 46 and 47 are integrated with the weft regulating warp yarns 12 and 13 as in the second embodiment (see FIGS. 4 and 5). The configuration in which the double weaving portion using the weft is unnecessary is more advantageous than the first embodiment (see FIGS. 1 and 2) in which the double weaving portion using the weft is necessary.

<Third Embodiment>
FIG. 6 is a schematic sectional view in the length direction showing another example of the felt according to the present invention. FIG. 7 is a schematic cross-sectional view in the width direction of the base fabric shown in FIG.

  In this felt 61, as shown in FIG. 6, as in the second embodiment (see FIGS. 4 and 5), the weft regulating warp for regulating the displacement of the wefts 43 and 44 on the base fabric 62. 63 is woven in a multi-woven state in which both the wefts 43 and 44 constituting the fabric layers 46 and 47 are intertwined. In particular, here, the warp regulating warp 63 is part of the ground warp 4. It is woven in place of 5. Other configurations are the same as those of the second embodiment.

  The weft regulating warp 63 is woven in the same manner as the weft regulating warp 45 in the second embodiment. Even in this configuration, the wefts 43 and 44 are reliably prevented from pairing, and the wefts 43 and 44 are prevented. Can be kept uniform.

  Since the weft regulating warp 63 is woven in place of the ground warp threads 4 and 5, unlike the above example, the same thread material as the ground warp threads 4 and 5 may be used. A thread material different from the warp threads 4 and 5 may be used.

<Modification of Third Embodiment>
FIG. 8 is a schematic sectional view in the length direction showing another example of the felt according to the present invention. FIG. 9 is a schematic cross-sectional view in the width direction of the base fabric shown in FIG.

  In this felt 81, as shown in FIG. 8, as in the third embodiment (see FIGS. 6 and 7), the weft regulating warp for regulating the displacement of the wefts 43 and 44 on the base fabric 82 is used. 83 is woven in place of some of the ground warps 4 and 5 in a multi-woven state in which both wefts 43 and 44 constituting the fabric layers 46 and 47 are intertwined. As shown in FIG. 2, two weft regulating warps 83 form a pair.

  The weft regulating warp 83 is woven in the same manner as the weft regulating warp 45 in the second embodiment, but the two weft regulating warps 83 that are paired in particular are woven in a vertically symmetrical manner, Thereby, the pairing of the wefts 43 and 44 can be reliably prevented, and the effect of keeping the distance between the wefts 43 and 44 uniform can be enhanced.

<Fourth Embodiment>
FIG. 10 is a schematic sectional view in the length direction showing another example of the felt according to the present invention. The cross section in the width direction is the same as FIG.

  This felt 101 is an example of a so-called seam felt which is formed with ends and pulled into a felt runn and joined to each other to endlessly in order to improve workability into a paper machine. In the base fabric 102, loops 113 for joining the end portions are formed at both ends in the length direction by turning back the yarns to be the ground warp yarns 104 and 105, and are alternately meshed so that their center holes are aligned. By inserting the joining core wire 114 in the width direction into the common hole formed in this manner, the endless joining is performed.

  The base fabric 102 is woven with a weft regulating warp 111 that regulates the displacement of the wefts 106 and 107 in the same manner as the weft regulating warp 45 in the second embodiment (FIGS. 4 and 5). Yes. The weft regulating warp 111 is cut at the seam portion. In addition, the configurations related to the ground warp yarns 104 and 105, the weft yarns 106 and 107, and the fabric layers 108 and 109 in the ground portion excluding the seam portion are the same as those in the second embodiment.

  FIG. 11 is a schematic diagram showing a procedure for manufacturing the base fabric 102 shown in FIG. Here, as shown in FIG. 11A, the ground warp yarns 104 and 105 on the paper machine are driven yarns on the loom, and the weft yarns 106 and 107 on the paper machine are warp yarns on the loom. The base fabric 102 is woven in an endless manner by bag weaving while forming a loop 113 by entwining a thread into the forming core material 115. In particular, here, the loop 113 is formed only on one of the ear portions 116 and 117 on the loom, and the driving yarn that becomes the ground warp yarns 104 and 105 is hooked on the loop forming core material 115 and folded back at the one ear portion 116. Thus, the loop 113 is formed.

  Further, as shown in FIG. 11B, the weft regulating warp yarn 111 becomes a driving yarn on the loom like the ground warp yarns 104 and 105. The driving yarn used as the weft regulating warp yarn 111 is for loop formation. It is driven as usual without being entangled with the core material 115. Here, the driven yarn that becomes the weft regulating warp 111 may cross and entangle with the driven yarns that become the ground warp yarns 104 and 105 at the ear portions 116 and 117. A method is selected in which the driven yarns that become the ground warp yarns 104 and 105 do not intersect.

  When the base fabric 102 is woven in this manner, the batt fiber layer 103 is laminated and integrated by needling after heat setting is performed on the endless base fabric 102. Then, the loop forming core material 115 is extracted, the loops 113 engaged with each other are separated, the loop 113 side is opened, and the butt fiber layer 103 and the weft regulating warp 111 are cut along the rows of the loops 113, so that the endless shape is obtained. The felt is finished in an end shape.

  At the time of weaving, the tomahawk 33 moves in the vertical direction, so that the pressing force of the tomahawk 33 acts on the ground warp yarns 104 and 105 and the weft yarns 106 and 107 in the vertical position of the tomahawk 33, and the ground warp yarn 104 105 is easily crimped, and thus the displacement of the wefts 106 and 107 is restricted, but the pressing force of the tomahawk 33 does not act on the portion located in the lateral direction of the tomahawk 33, that is, in the vicinity of the loop 113. It is difficult to crimp the warp yarn 104/105. For this reason, conventionally, there has been an inconvenience that the weft yarns 106 and 107 are gathered on the loop 113 side. However, here, the weft regulating warp yarn 111 regulates the displacement of the weft yarns 106 and 107. Collecting on the loop 113 side can be avoided.

  In addition, as shown in FIG. 10, the weft regulating warp 111 remains cut even when joined endlessly, but one side (running) covers the paper making surface 101a side of the loop 113. Since the fibers forming the flap 103a in the form in which the bat fiber layer 103 is protruded from the end side of the front side in the direction are held by the weft regulating warp 111, wear of the flap 103a can be suppressed.

<Fifth Embodiment>
FIG. 12 is a schematic cross-sectional view in the length direction showing an example of the felt manufacturing method according to the present invention step by step.

  First, as shown in FIG. 12A, the base fabric 121 is woven in the same manner as the base fabric 42 in the second embodiment (see FIGS. 4 and 5). A water-soluble yarn material that is soluble in water (solvent) is used for the warp yarn 122. As such a water-soluble thread material, for example, a material made of PVA (polyvinyl alcohol) is suitable.

  When the base fabric 121 is woven, next, as shown in FIG. 12 (B), after performing needling for integrating the bat fiber layer 3 into the base fabric 121, the obtained felt 123 is washed. The weft regulating warp yarn 122 is eluted and removed in the washing water. As a result, as shown in FIG. 12C, a finished felt 125 is obtained. In this felt 125, the weft regulating warp 122 does not exist in the base fabric 124. Can be improved.

  If the weft regulating warp 122 is removed after the needling step, the weft regulating warp 122 is present until the needling step, so that the displacement of the wefts 43 and 44 is reliably regulated. After the ring process, the fibers of the bat fiber layer 3 are entangled to restrict the displacement of the wefts 43 and 44. Therefore, the wefts 43 and 44 are not displaced regardless of the presence or absence of the weft restriction warp 122.

  When a water-soluble yarn material is used for the weft regulating warp, the weft is woven in the same way as the weft regulating warp 12 and 13 in the first embodiment (see FIGS. 1 and 2). Although it is possible to weave the warp for regulation, if the same weaving method as in the second embodiment (see FIGS. 4 and 5) is adopted, the double weaving portion by the weft 11 is unnecessary, so that it approximates the laminate structure. This is advantageous in obtaining characteristics.

  INDUSTRIAL APPLICABILITY The papermaking felt and the method for producing the same according to the present invention have an effect of suppressing the yarn slippage in which the spacing of the wefts is not uniform in the multilayered base fabric, and the bat fiber layer is integrated with the base fabric. Papermaking felts, such as press felts used in press parts (pressing parts) of paper machines, dryer felts used in dry parts (drying parts), and various papermaking belts such as shoe press belts and transfer belts Useful as cloth.

It is typical sectional drawing of the length direction which shows an example of the felt by this invention. It is typical sectional drawing of the width direction of the base fabric shown in FIG. It is a schematic diagram which shows the point of manufacture of the base fabric shown in FIG. It is typical sectional drawing of the length direction which shows another example of the felt by this invention. It is typical sectional drawing of the width direction of the base fabric shown in FIG. It is typical sectional drawing of the length direction which shows another example of the felt by this invention. It is typical sectional drawing of the width direction of the base fabric shown in FIG. It is typical sectional drawing of the length direction which shows another example of the felt by this invention. It is typical sectional drawing of the width direction of the base fabric shown in FIG. It is typical sectional drawing of the length direction which shows another example of the felt by this invention. It is a schematic diagram which shows the point of manufacture of the base fabric shown in FIG. It is typical sectional drawing of the length direction which shows an example of the manufacturing method of the felt by this invention in steps.

Explanation of symbols

1, 41, 61, 81, 101, 125 Felt, 1a, 41a, 61a, 81a, 101a Papermaking surface, 1b, 41b, 61b, 81b, 101b Running surface 2, 42, 62, 82, 102, 124 Base fabric 3・ 103 Bat fiber layer 4 ・ 5 ・ 104 ・ 105 Ground warp yarn 6 ・ 7 ・ 11 ・ 43 ・ 44 ・ 106 ・ 107 Weft yarn 8 ・ 9 ・ 46 ・ 47 ・ 108 ・ 109 Fabric layer 12 ・ 13 ・ 45 ・ 63 ・ 83・ 111 ・ 122 Weft control warp 113 loop

Claims (8)

A papermaking felt in which a bat fiber layer is integrated with a base fabric,
The base fabric has a multilayer structure in which a plurality of ground warp yarns made of monofilament yarns are overlapped in the thickness direction and weft yarns individually entangled with each of the ground warp yarns are overlapped in the thickness direction to laminate a single weaving fabric layer. A felt for papermaking, comprising a plurality of weft regulating warps that are entangled with the weft yarns so as to bend more than the ground warp yarns and regulate the displacement of the weft yarns at predetermined intervals.   The base fabric is a single woven superposition portion where the single woven fabric layers are overlapped, and a multiple woven portion in which wefts are woven so as to be entangled with both the ground warp yarns constituting the woven fabric layers, respectively. The papermaking felt according to claim 1, wherein the papermaking felt has a mixed structure.   3. The papermaking felt according to claim 2, wherein the weft regulating warp is woven in a single weaving polymerization state in which the wefts respectively constituting the fabric layer are individually entangled and overlapped in the thickness direction. .   4. The papermaking felt according to claim 3, wherein the weft regulating warp overlapping in the thickness direction is woven with a symmetrical structure.   5. The papermaking felt according to claim 1, wherein the weft regulating warp is woven in a multiple weaving state in which both the wefts constituting each of the fabric layers are entangled with each other. .   6. The papermaking felt according to claim 5, wherein the weft regulating warp is woven in place of a part of the ground warp.   The papermaking felt according to any one of claims 1 to 6, wherein the ground warp yarn forms a loop for end joining by folding back at an end in the length direction. A method for producing a felt for papermaking in which a bat fiber layer is integrated with a base fabric,
The base fabric has a multilayer structure in which a plurality of ground warp yarns made of monofilament yarns are overlapped in the thickness direction, and weft yarns individually entangled with each of the ground warp yarns are overlapped in the thickness direction so that a single woven fabric layer is laminated. At this time, a weft regulating warp made of a soluble yarn material that can be dissolved in a predetermined solvent is entangled with the weft so as to bend more than the ground warp, and the displacement of the weft is regulated. As weaving,
A method for producing a felt for papermaking, characterized in that after the bat fiber layer is integrated by needling, the warp regulating warp is eluted and removed in the liquid.

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