JP2010100947A - Paper making felt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the fiber loss of a bat fiber layer without causing increases in manufacturing cost and large change of physical properties. <P>SOLUTION: In the paper making felt made by integrating a base fabric 2 with a bat fiber layer 3, the ground fabric has a multilayer structure in which a plurality of ground warps 4 and 5 composed of monofilament yarn are piled in the thickness direction and layers made of each ground warp are laminated, additional warps 13 made of a yarn material different from the ground warps constitute only an upper layer 11 with the ground warps on a papermaking surface side and are woven so as to float and sink on the surface of papermaking surface side of the ground fabric. Especially, the additional warps are not entangled with wefts and woven so that the ratio of the part generally straightly passing the surface side or the inside of the ground fabric is higher than the ratio of the part entangled with the wefts and bent. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a papermaking felt in which a batt fiber layer is integrated with a base fabric.

  In order to improve the workability of putting into a paper machine, so-called seam felts are widely used in which end felts are drawn into a felt run and both end portions thereof are joined to each other to be endless. In this type of seam felt, loops formed at the end in the length direction by folding back warps constituting the base fabric are alternately meshed so that their center holes are aligned, and the core wire is formed in the common hole formed thereby. The structure which joins both ends through is common.

  In such a seam felt, a monofilament yarn is used as a warp forming a loop for convenience of operations such as loop engagement and core wire insertion. Even in endless felts without seams, monofilament yarns are used as warp yarns for the base fabric for the purpose of improving dimensional stability.

  However, the monofilament yarn used for the warp of the base fabric is weak in the entanglement of the fibers forming the bat fiber layer, so that the fibers of the bat fiber layer are likely to fall off, so-called hair removal occurs. Depilation of the fiber layer causes inconvenience that changes characteristics such as air permeability that affects water squeezing, while depilation of the bat fiber layer on the running surface side causes wear on the warp and weft of the base fabric, resulting in strength. Inconvenience that lowers.

  In addition, since monofilament yarn used for warp of the base fabric is difficult to flatten, the knuckle portion where the warp is entangled with the weft and bends protrudes from the surface of the base fabric. When the pressure at the portion corresponding to the point is increased, a dot-like mark appears on the paper, or a streak-like mark in the warp direction appears on the paper, resulting in a problem that the surface property of the paper is deteriorated.

Therefore, in order to suppress the occurrence of hair loss and marks in such a bat fiber layer, smooth fabric woven with a base fabric woven with a good tangled fiber of the bat fiber layer or a fine thread material. A laminate structure in which a high base fabric is superposed on a base fabric in which monofilament yarn is used as a warp is widely used (see, for example, Patent Documents 1 to 4).
Japanese Patent Publication No. 63-38467 Japanese Patent No. 3145717 Japanese Patent No. 3347034 Japanese Patent No. 4045134

  However, in the above laminate structure, it is necessary to weave two base fabrics separately with a loom at the time of manufacture, and to heat set the base fabrics separately, and the two base fabrics have a non-woven fiber layer. The two base fabrics need to be specially adjusted to prevent any problems such as misalignment, and the two base fabrics have a structural structure. Since they are different, it is difficult to adjust the dimensions, which increases the man-hours and increases the manufacturing cost.

  Further, in this laminate structure, since a plurality of base fabrics are used, there is a problem that the physical properties of the base fabrics are greatly changed, such as an increase in the basis weight of the base fabric or an increase in the thickness of the base fabric. .

  The present invention has been devised in order to solve such problems of the prior art, and its main purpose is to remove the batt fiber layer without causing an increase in manufacturing cost and a large change in physical properties. An object of the present invention is to provide a papermaking felt configured to be able to be suppressed. A further object of the present invention is to improve the surface smoothness of the paper by improving the smoothness of the surface of the base fabric.

  In order to solve such a problem, in the present invention, as shown in claim 1, in the felt for papermaking in which the bat fiber layer is integrated with the base fabric, the base fabric is a ground warp yarn made of monofilament yarn. A multi-layer structure in which a plurality of warp layers are stacked in the thickness direction and an additional warp made of a yarn material different from the ground warp constitutes only the ground warp layer on the paper-making surface side, and the base The cloth was woven so as to float and sink on the surface of the paper side of the cloth.

  Further, in the present invention, as shown in claim 2, in the papermaking felt in which the batt fiber layer is integrated with the base fabric, the base fabric has a plurality of ground warp yarns made of monofilament yarns overlapped in the thickness direction. It has a multi-layer structure in which layers of warps are laminated, and the additional warp made of a yarn material different from the ground warp constitutes only the layer of the ground warp on the running surface side and is on the running surface side surface of the base fabric. It was woven so as to rise and fall.

  According to this, the fibers forming the bat fiber layer are entangled with the additional warp in addition to the ground warp and the weft, so that the fiber of the bat fiber layer is firmly held by the base fabric, thereby suppressing the hair loss of the bat fiber layer. can do. Further, since the additional warp is woven together with the ground warp at the time of weaving, the man-hours are not increased as in the case of the laminate structure, and an increase in manufacturing cost can be avoided.

  In particular, in the configuration in which the additional warp is woven so that only the layer of the ground warp on the paper-making surface side is formed and floats and sinks on the surface of the paper-making surface of the base fabric, the hair removal of the bat fiber layer on the paper-making surface side is suppressed. Can do. Furthermore, since the additional warp fills the gap between the ground warps adjacent in the lateral direction on the surface on the paper making surface side of the base fabric, the smoothness of the surface on the paper making surface side of the base fabric is improved and the surface property of the paper is improved. be able to.

  On the other hand, in the configuration in which the additional warp is woven so that only the layer by the ground warp on the running surface side is formed and floats and sinks on the running surface side surface of the base fabric, the hair removal of the bat fiber layer on the running surface side is suppressed. It is possible to suppress wear of the base fabric due to contact with a roll of a paper machine.

  It is also possible to weave both an additional warp that forms only a layer made of ground warp on the papermaking surface side and an additional warp that forms only a layer made of ground warp on the running surface side.

  In the papermaking felt, as shown in claim 3, the ratio of the portion where the additional warp passes substantially straight through the surface side or the inside of the base fabric without being entangled with the weft is entangled with the weft. It can be set as the structure woven so that it may become higher than a ratio.

  According to this, it is possible to avoid that the thickness of the base fabric and the amount of voids vary greatly due to the addition of the additional warp.

  In particular, the smoothness of the base fabric can be further improved when the additional warp is woven so that the proportion passing through the surface side from the inside of the base fabric is higher.

  In the felt for papermaking, as shown in claim 4, the additional warp may be made of a thread material thinner than the ground warp.

  According to this, the increase of the fabric weight of the base fabric by adding an additional warp can be suppressed small. Furthermore, since a thin thread material is easy to bend, it is possible to avoid a significant change in the thickness of the base fabric due to the addition of an additional warp.

  In addition, the structure which makes the yarn density of an additional warp low is also possible, and the same effect can be acquired by this.

  In the papermaking felt, as shown in claim 5, the additional warp may be made of an aggregate yarn material in which a large number of either one or both of staples and filaments are aggregated.

  According to this, since the fibers forming the bat fiber layer are easily entangled with the additional warp, hair removal of the bat fiber layer can be further suppressed. Furthermore, since the aggregate yarn material is easier to bend and flatten than the monofilament yarn, it can be avoided that the thickness of the base fabric is significantly changed by adding the additional warp.

  In the papermaking felt, as shown in claim 6, the ground warp yarn can be configured to form a loop for end joining by folding back at the end in the length direction.

  According to this, a seam felt having a loop for joining the end part usually uses a relatively thick monofilament thread for the warp forming the loop in order to ensure the strength of the seam part, the convenience of loop engagement and core wire insertion work. Therefore, the hair loss of the bat fiber layer and the decrease in the smoothness of the surface of the base fabric tend to be remarkable, but by adopting the configuration as described above, these problems can be effectively solved. it can.

  Further, in this configuration, the additional warp is cut at the seam portion, but the additional warp passes through the flap portion provided in the bat fiber layer so as to cover the loop. Since it is hold | maintained, the hair loss of a flap part can be suppressed.

  As described above, according to the present invention, since the fibers forming the bat fiber layer are entangled with the additional warp in addition to the ground warp and the weft, the fibers of the bat fiber layer are firmly held by the base fabric. Hair loss of the layer can be suppressed. Furthermore, since the additional warp is woven together with the ground warp at the time of weaving, the man-hours do not increase as in the case of the laminate structure, and an increase in manufacturing cost can be avoided.

  Further, in the configuration in which the additional warp is woven so as to constitute only the layer made of the ground warp on the papermaking side, the hair removal of the bat fiber layer on the papermaking side is suppressed, and the smoothness of the surface on the papermaking side of the base fabric is suppressed. In the configuration in which additional warp is woven so as to constitute only the layer of ground warp on the running surface side, the hair removal of the bat fiber layer on the running surface side is suppressed. It is possible to suppress wear of the base fabric due to contact with a roll of a paper machine. In particular, even in the case of a seam felt in which a relatively thick monofilament yarn must be used for the warp forming the loop for end joining, the strength of the seam portion, the loop engagement and the core wire insertion workability are reduced. In addition, hair loss of the bat fiber layer can be suppressed.

  In addition, the configuration in which the additional warp is woven so that the ratio of the portion that passes through the surface side or the inside of the base fabric substantially straight without being entangled with the weft, or the additional warp is made of a thread material that is thinner than the ground warp. By adopting the configuration, changes in physical properties such as an increase in the basis weight of the base fabric, an increase in thickness, and a decrease in the void amount due to the addition of the additional warp can be suppressed to a small level.

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

  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 showing the base fabric shown in FIG. 1.

  This felt 1 is formed by laminating a batt fiber layer 3 on a base fabric 2 by needling, and the base fabric 2 has a loop 8 for joining the end portions by turning back the yarns to be the ground warp yarns 4 and 5. Are formed at the end in the length direction, and are joined endlessly by inserting the joining core wire 9 in the width direction into the common hole formed by alternately meshing so that the respective center holes are aligned. .

  The base fabric 2 has an upper layer 11 formed by upper and lower ground warp yarns 4 and 5 in which an upper (papermaking surface 1a side) ground warp yarn 4 and a lower (running surface 1b side) ground warp yarn 5 overlap each other in the thickness direction. And the lower layer 12 are laminated. The ground warp yarns 4 and 5 do not intersect with each other, and the weft yarn 6 is entangled with the upper and lower ground warp yarns 4 and 5 so that the upper layer 11 and the lower layer 12 are coupled to each other.

  The ground warp yarns 4 and 5 are monofilament yarns made of a high-strength synthetic resin material such as polyamide in order to form the end joining loops 8. The yarn density is preferably 15 to 24 yarns / cm (40 to 60 yarns / inch). A monofilament yarn made of a high-strength synthetic resin material such as polyamide is also used for the weft yarn 6. For example, the thickness is 0.30 to 0.55 mm, and the yarn density is 11 to 24 yarns / cm (30 to 30 mm). 60 / inch).

  In addition to the ground warp yarns 4 and 5 forming the loop 8, an additional warp yarn 13 is woven into the base fabric 2 so as to constitute only the upper layer 11 of the upper ground warp yarn 4. As shown in FIG. 2, the additional warp 13 is woven so that the weft 6 is entangled with the upper surface of the base fabric 2 so as to be entangled with the weft 6 in the vicinity of the intersection passing through the upper side of the ground warp 4. The lower layer 12 by the lower ground warp 5 does not pass. For this additional warp 13, a yarn material different from the ground warp, in particular, a twisted yarn obtained by twisting filaments is used here.

  As a result, the fibers forming the batt fiber layer 3 are entangled with the additional warp 13 in addition to the ground warp yarn 4 and the weft yarn 6, so that the fibers of the batt fiber layer 3 are firmly held by the base fabric 2. The hair loss of the layer 3, that is, the detachment of the fibers of the batt fiber layer 3 can be suppressed. In particular, since the additional warp 13 is woven so as to constitute only the upper layer 11, the batt fiber layer 3 on the upper surface side is provided. Hair loss can be suppressed.

  In addition, the additional warp 13 can be a monofilament yarn composed of a single filament, but when an aggregate yarn material in which a large number of either one or both of staples and filaments are aggregated, the batt fiber layer 3 is formed. Since the entanglement of the fibers is good, it is effective in suppressing the hair loss of the batt fiber layer 3. For example, a multifilament yarn in which a large number of filaments are bundled, a spun yarn obtained by spinning staples, a multifilament yarn and spinning A twisted yarn with a yarn and a twisted yarn of a multifilament yarn and a monofilament yarn are also possible.

  Further, the additional warp 13 includes a twisted yarn including a fiber made of a heat-melting material (a thermoplastic resin material having a relatively low melting point), a core-sheath yarn using a heat-melting material for the sheath, and a fiber made of a heat-melting material. Mole yarns (fluffed yarns) that use the yarn for fluff (flower yarn) are also possible. When the yarn material containing the hot melt material is used for the additional warp 13 as described above, the heat treatment of the additional warp 13 is performed by performing a heat treatment after the needling step of integrating the bat fiber layer 3 with the woven base fabric 2. Since the molten material is melted and welded to the fibers of the batt fiber layer 3 and the bonding force between the additional warp 13 and the fibers of the batt fiber layer 3 is increased, a high hair removal suppressing effect can be obtained.

  Further, the additional warp 13 is made of a thread material thinner than the ground warp threads 4 and 5. For example, in the case of a twisted filament, two to six filaments having a thickness of 0.15 to 0.25 mm are twisted together. Good. In the case of monofilament yarn, the thickness is preferably 0.15 to 0.30 mm, and the yarn density is preferably 3 to 12 yarns / cm (10 to 30 yarns / inch). In the case of multifilament yarn, 20 to 300 filaments of 4 to 50 dtex are preferably bundled. In the case of spun yarn, it is good to set it as 7-25Nm (meter count). Thus, by using a thread material thinner than the ground warp threads 4 and 5 for the additional warp thread 13, an increase in the basis weight due to the addition of the additional warp thread 13 can be suppressed to be small. Further, the additional warp thread 13 is the ground warp thread 4 and the weft thread 6. Therefore, an increase in the thickness of the base fabric 2 can be suppressed to a small level.

  Further, the additional warp 13 is woven so that the ratio of the portion passing through the surface side of the base fabric 2 without being intertwined with the weft yarn 6 is increased. In particular, here, the surface side of the base fabric 2 is mainly used. It passes through, that is, is woven so that the ratio of passing through the surface side from the inside of the base fabric 2 is higher. Specifically, after passing through the lower side of one weft 6, it passes through the upper side of seven wefts 6. The additional warp 13 is woven in the structure. Thus, the additional warp 13 is added to the base fabric 2 by adding the additional warp 13 by reducing the knuckle portion where the additional warp 13 is entangled with the weft 6 and reducing the knuckle portion, and securing the portion where the additional warp 13 passes substantially straight. It is possible to avoid a significant change in thickness and void volume.

  Further, as shown in FIG. 2, the additional warp 13 is arranged between the upper ground warp yarns 4 in the cross section in the width direction, and on the upper surface of the base fabric 2, the gap between the adjacent ground warp yarns 4 is formed. Since the additional warp 13 is filled, the smoothness of the upper surface of the base fabric 2 is improved, and the pressure state during pressurization with the press roll is made uniform, so that the surface property of the paper can be improved.

  In particular, when the ground warp yarn 4 is made of a monofilament yarn, a portion where the pressure is high during pressurization by a press roll is generated corresponding to the knuckle portion where the ground warp yarn 4 is intertwined with the weft yarn 6 and bent, and a knuckle mark (pressure Spot) appears, but the additional warp 13 is arranged next to the knuckle portion of the ground warp 4 to disperse the pressure, so that the knuckle mark becomes weaker, and the streak marks appearing on the paper along the ground warp 4 also Can be reduced.

  In particular, in this example, the additional warp 13 and the ground warp 4 are alternately arranged, and the additional warp 13 and the ground warp 4 have the same yarn density, and both the ground warp 4 · 5 and the additional warp 13 are taken into consideration. The weft 6 has a structure in which only three warps pass through the inside of the upper and lower ground warps 4 and 5 and then pass only one warp through the outer sides of the upper and lower ground warps 4 and 5.

  Further, it is possible to make the additional warp 13 lower in density than that of the ground warp 4, for example, every other additional warp 13 can be arranged in the gap between the side warps 4 adjacent in the lateral direction. The yarn density may be set as appropriate in consideration of the desired degree of smoothness, the basis weight that changes depending on the yarn density of the additional warp 13, the allowable range of the porosity, and the like. It is particularly preferable that the ratio of the total number of the ground warps 4 and the ground warps 5 and the additional warps 13 is in a range from 1: 1 to 10: 1.

  The weft yarn 6 can also be made of an aggregate yarn material such as a twisted yarn. In the case of a twisted yarn, for example, it is preferable that 3 to 10 filaments having a thickness of 0.15 to 0.25 mm are twisted together. . Further, different yarn materials can be woven, for example, a monofilament yarn and a filament twist yarn can be woven.

  FIG. 3 is a schematic view showing a procedure for manufacturing the base fabric shown in FIG. Here, as shown in FIG. 3A, the ground warp yarns 4 and 5 on the paper machine are woven as driven yarns on the loom, and the weft yarns 6 on the paper machine become warps (warp yarns) on the loom. The base fabric 2 is woven in an endless manner by bag weaving while forming a loop 8 by winding a thread into the loop forming core 31. Specifically, the loop 8 is formed on one of the ear portions 32 and 33 on the loom, and the thread to be ground warp yarns 4 and 5 is hooked on the loop forming core material 31 at the one ear portion 32 and turned back. Thus, the loop 8 is formed.

  Further, as shown in FIG. 3B, the additional warp 13 becomes a driving yarn on the loom like the ground warp yarns 4 and 5, and the driving yarn to be the additional warp 13 is applied to the loop forming core material 31. It is driven as usual without entanglement. Here, the driven yarn that becomes the additional warp 13 may cross and entangle with the driven yarn that becomes the ground warp yarns 4 and 5 at the ear portions 32 and 33, so that the driven yarn that becomes the additional warp yarn 13 and the ground warp yarn 4. A method is selected that does not intersect with the thread to be driven.

  The weaving pattern of the additional warp 13 is defined by the number of twill frames through which the warp yarn to be used as the weft 6 is passed, and is based on the weaving pattern of the ground warp yarns 4 and 5, as shown in FIG. The weaving pattern of the ground warps 4 and 5 is the basic pattern (unit structure) of the four wefts 6, whereas the weaving pattern of the additional warps 13 is the basic unit of the ground warps 4 and 5 Eight of the wefts 6 that are doubled form a basic pattern.

  When the base fabric 2 is woven in this manner, the batt fiber layer 3 is laminated and integrated by needling after heat setting is performed on the endless base fabric 2. Then, the loop forming core material 31 is extracted, the meshed loops 8 are separated, the loop 8 side is opened, and the batt fiber layer 3 and the additional warp 13 are cut along the rows of the loops 8 so that an endless felt is obtained. Is finished in an end shape.

  As shown in FIG. 1, the additional warp 13 remains cut even in the endlessly joined state, but one side (front side in the running direction) covers the paper making surface 1 a side of the loop 8. Since the fibers forming the flap 3a in the form in which the bat fiber layer 3 is protruded from the end portion side are held by the additional warp 13, the wear of the flap 3a can be suppressed.

  FIG. 4 is a schematic cross-sectional view in the length direction showing a modification of the base fabric shown in FIG. 1. Here, as in the example of FIG. 1, the additional warp yarns 13 and 14 are woven, but in the examples of FIGS. 1 and 4A to 4C, the weaving positions and weaving of the additional warp yarns 13 and 14 are performed. Each is different.

  In the base fabric 41 shown in FIG. 4A, the additional warp 13 is woven so as to constitute only the upper layer 11 of the upper ground warp 4 as in the example of FIG. Unlike the example, the additional warp 13 is woven so as to mainly pass through the inner side of the base fabric 41, that is, through the inner side of the surface side of the base fabric 41.

  When the additional warp 13 is woven so as to pass mainly inside the base fabric 41 as described above, the effect of improving the smoothness of the surface of the base fabric 41 is reduced, but the hair removal of the bat fiber layer 3 is suppressed. From the viewpoint, since the additional warp 13 does not float for a long time on the surface of the base fabric 41, the fibers of the bat fiber layer 3 can be firmly held, and an effect equivalent to or more than that of the example of FIG. 1 can be obtained. it can.

  On the other hand, in the example shown in FIGS. 4B and 4C, the additional warp 14 is woven so as to constitute only the lower layer 12 of the lower ground warp 5. In contrast to the additional warp 13 in the example of FIG. 2, the additional warp 14 is entangled with the weft 6 in the vicinity of the intersection where the weft 6 passes below the ground warp 5. It is woven so as to float and sink on the lower surface, and the upper layer 11 formed by the upper ground warp yarn 4 does not pass. The type and thickness of the yarn material used for the additional warp 14 are the same as those for the additional warp 13.

  In particular, in the base fabric 42 shown in FIG. 4B, the additional warp 14 is woven so that the ratio of passing through the surface side of the base fabric 42, that is, passing through the surface side from the inside of the base fabric 42 is higher. In the base fabric 43 shown in FIG. 4C, the additional warp yarns 14 are woven so that the ratio of passing through the inside of the base fabric 43, that is, passing through the inside of the surface side of the base fabric 43 is higher.

  When the additional warp 14 is woven so as to constitute only the lower layer 12 in this way, the hair removal of the bat fiber layer 3 on the lower surface side can be suppressed, and the back surface wear due to contact with a roll of a paper machine or the like can be suppressed. can do.

  FIG. 5 is a schematic sectional view in the length direction showing another example of the felt according to the present invention. FIG. 6 is a schematic cross-sectional view in the width direction showing the base fabric shown in FIG. 5.

  Here, both the additional warp 13 which comprises only the upper layer 11 by the upper ground warp 4 and the additional warp 14 which comprises only the lower layer 12 by the lower ground warp 5 are woven. In particular, here, both the upper additional warp 13 and the lower additional warp 14 are woven so that the proportion passing through the surface side is higher than the inner side of the base fabric 51.

  According to this, the upper additional warp 13 improves the smoothness of the upper surface of the base fabric 51, and the lower additional warp 14 suppresses the hair removal of the lower surface side bat fiber layer 3, so that the paper machine Back surface wear due to contact with a roll or the like can be suppressed.

  FIG. 7 is a schematic cross-sectional view in the length direction showing a modification of the base fabric shown in FIG. Here, as in the example of FIG. 5, both the additional warp 13 constituting only the upper layer 11 and the additional warp 14 constituting only the lower layer 12 are woven, but FIG. 5 and FIGS. In each example of C), the way of weaving the additional warps 13 and 14 is different.

  In the base fabric 71 shown in FIG. 7A, both the additional warps 13 and 14 are woven so as to pass mainly inside the base fabric 71, contrary to the example of FIG. In the base fabric 72 shown in FIG. 7B, the upper additional warp 13 is woven so as to mainly pass through the surface side of the base fabric 72, and the lower additional warp 14 mainly covers the inside of the base fabric 72. It is woven to pass. In the base fabric 73 shown in FIG. 7C, the upper additional warp 13 is woven so as to pass mainly inside the base fabric 73, contrary to the example of FIG. 14 is woven so as to mainly pass through the surface side of the base fabric 72.

  FIG. 8 is a schematic cross-sectional view in the width direction showing a modification of the base fabric shown in FIG. Here, as in the example of FIG. 6, both the additional warp 13 that constitutes only the upper layer 11 and the additional warp 14 that constitutes only the lower layer 12 are woven, but here, the upper and lower additional warps 13 and 14 are included. The upper and lower additional warps 13 and 14 are alternately woven so that the yarns do not overlap in the thickness direction.

  8A to 8D, the upper and lower additional warps 13 and 14 are woven, that is, the additional warps 13 and 14 mainly pass through either the surface side or the inner side of the base fabrics 81 to 84. Are different from each other, and the weaving method is the same as in the examples of FIGS. 5 and 7A to 7C.

  FIG. 9 is a schematic cross-sectional view in the width direction showing another example of the base fabric according to the present invention. In the above example, the weft 6 has a structure that passes between the upper and lower ground warps 4 and 5 by one side, but in this base fabric 91, the weft 92 is made up of the upper and lower ground warps 4 and 5. 5 has a structure that passes between the two sides, and in this structure as well, in the same way as in the above example, it consists of twisted yarns and the like separately from the ground warp yarns 4 and 5 made of monofilament yarns. A configuration in which additional warps 13 and 14 are woven is possible.

  In this example, considering both the ground warp yarns 4 and 5 and the additional warp yarns 13 and 14, the weft yarn 92 passes through the inside of the upper and lower ground warp yarns 4 and 5 by the amount of the warp yarns, and then the upper and lower ground warp yarns 4. 5 is a structure that passes only one warp on the outer side of 5.

  Here, an example is shown in which both the additional warp 13 constituting only the upper layer 11 and the additional warp 14 constituting only the lower layer 12 are woven. However, as in the example of FIGS. A configuration in which only one of the upper and lower additional warps 14 is woven, or a configuration in which the upper and lower additional warps 13 and 14 are alternately woven is also possible as in the example of FIG.

  FIG. 10 is a schematic sectional view in the length direction showing another example of the felt according to the present invention. Although the above example relates to a seam felt joined endlessly by the loop 8, the felt 101 is an endless felt without a seam.

  In the felt 101, the ground warp yarns 104 and 105 of the base fabric 102 are endless without forming a loop, and the bat fiber layer 103 is not cut. In such a felt, similarly to the above example, an additional warp 107 made of twisted yarn or the like can be woven in addition to the ground warp yarns 104 and 105 made of monofilament yarn.

  In addition, although the example which weaves the additional warp 107 which comprises only the upper layer 111 by the ground warp 104 of the upper side (paper-making surface 101a side) was shown here, the lower side (running surface 101b side) is similar to the above examples. A configuration in which an additional warp that constitutes only the lower layer 112 of the ground warp 105 is also possible.

  As described above, the base fabric having a warp two-layer structure in which the upper and lower layers of the upper and lower ground warps are laminated has been described as an example. However, the present invention is not limited to this, and the upper and lower three or more fabrics are not limited thereto. It can be similarly applied to a base fabric having a textured structure in which three or more layers of ground warp yarns are laminated.

  The papermaking felt according to the present invention has an effect of suppressing hair removal of the bat fiber layer without causing an increase in production cost and a large change in physical properties, and the bat fiber layer is integrated with the base fabric. It is useful as a felt for papermaking, for example, a press felt used in a press part (pressing part) of a paper machine or a dryer felt used in a dry part (drying part).

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 which shows 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 the modification 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 which shows the base fabric shown in FIG. It is typical sectional drawing of the length direction which shows the modification of the base fabric shown in FIG. It is typical sectional drawing of the width direction which shows the modification of the base fabric shown in FIG. It is typical sectional drawing of the width direction which shows another example of the base fabric by this invention. It is typical sectional drawing of the length direction which shows another example of the felt by this invention.

Explanation of symbols

1 · 101 Felt, 1a · 101a Paper making surface, 1b · 101b Running surface 3 Butt fiber layer, 3a Flap 2 · 41 to 43 · 51 · 71 to 73 · 81 · 91 · 102 Base fabric 3 · 103 Butt fiber layer 4 5 · 104 · 105 Ground warp 6 · 92 · 106 Weft 8 Loop 9 Joining core wire 11 · 111 Upper layer 12 · 112 Lower layer 13 · 14 · 107 Additional warp

Claims (6)

A papermaking felt in which a bat fiber layer is integrated with a base fabric,
The base fabric has a multi-layer structure in which a plurality of warp yarns made of monofilament yarns overlap each other in the thickness direction and layers of warp yarns from various locations are laminated, and additional warp yarns made of a yarn material different from the ground warp yarns A papermaking felt, comprising only a layer of the ground warp yarn and woven so as to float and sink on the surface of the base fabric on the papermaking surface side. A papermaking felt in which a bat fiber layer is integrated with a base fabric,
The base fabric has a multi-layer structure in which a plurality of warp yarns made of monofilament yarns are stacked in the thickness direction and layers of warp yarns from various locations are laminated, and additional warp yarns made of a yarn material different from the ground warp yarns are provided on the running surface side. A felt for papermaking, comprising only a layer of the ground warp yarn and woven so as to float and sink on the surface of the base fabric on the running surface side.   The additional warp is woven so that the ratio of the portion that passes through the surface side or the inside of the base fabric substantially straight without being entangled with the weft is higher than the ratio of the portion that is entangled with the weft and bends. The papermaking felt according to claim 1 or 2.   The papermaking felt according to any one of claims 1 to 3, wherein the additional warp is made of a thread material thinner than the ground warp.   The papermaking felt according to any one of claims 1 to 4, wherein the additional warp is made of an aggregate yarn material in which a large number of either one or both of staples and filaments are aggregated.   The papermaking felt according to any one of claims 1 to 5, wherein the ground warp yarn forms a loop for end joining by folding back at an end in the length direction.

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