JP6177175B2 - Dryer canvas for papermaking - Google Patents

Description

  The present invention relates to a paper making dryer canvas used in a dry part of a paper machine.

  In a papermaking dryer canvas (hereinafter also referred to as a canvas) having a large contact area with paper, dirt such as pitch residue tends to adhere to the canvas surface. If this dirt accumulates on the canvas surface, it not only causes a decrease in air permeability due to clogging, but also causes the occurrence of mark defects and dirt on the contacting paper, which is a problem. Therefore, conventionally, the warp is composed of a monofilament having a round cross section to reduce the contact with paper, or the 2/1 twill structure is used with a 1/2 twill structure to reduce the contact area with paper. It was done. Recently, weaving canvases by changing the thickness of the weft has been proposed to reduce the number of contact points to the paper and reduce the adhesion of dirt (Patent Documents 1 and 2).

JP-A-9-310291 JP 2003-96683 A

  However, even when the warp is changed from a flat cross section to a round cross section, the adhesion of dirt does not decrease so much. In the inventions described in Patent Document 1 and Patent Document 2, thick wefts and thin wefts are used to reduce the contact point with paper to reduce the adhesion of dirt to the canvas surface, but the horizontal direction is a line. For a canvas with a convex shape and a low horizontal density, the distance between the convex portion and the convex portion becomes longer and the contact pressure partially increases, so that the concave portion may also come into contact with the paper. It is considered and further improvement is required.

  In order to solve the above problems, the present invention provides a papermaking dryer canvas in which the adhesion of dirt to the paper contact surface side surface of the canvas is reduced.

The present invention is a papermaking dryer canvas including a papermaking dryer canvas body woven with warps and wefts, and a warp yarn having a large wire diameter and a warp yarn having a thin wire diameter are arranged on the paper contact surface side of the papermaking dryer canvas body. is, to be present projecting point diameter is formed by a thick warp threads on all of the weft in contact paper side, the contact paper side of the papermaking drier canvas body, the wire diameter is thick in three per warp The present invention relates to a paper making dryer canvas characterized in that one warp is regularly arranged .

  In the present invention, a warp with a large wire diameter and a warp with a thin wire diameter are arranged on the paper contact surface side of the dryer canvas body for papermaking, and all the wefts on the paper contact surface side have protruding points formed by the warp having a large wire diameter. By doing so, it is possible to reduce the adhesion of dirt to the surface of the paper making dryer canvas on the paper contact surface side.

FIG. 1A is a schematic view of the surface of the paper-making dryer canvas of the embodiment of the present invention on the paper contact surface side, and FIG. 1B is a schematic cross-sectional view in the weft direction of the paper-making dryer canvas. FIG. 2A is a schematic view of the surface of the paper-making dryer canvas of one comparative example of the present invention on the paper contact surface side, and FIG. 2B is a schematic cross-sectional view in the weft direction of the paper-making dryer canvas. FIG. 3A is a schematic view of the surface of the paper-making dryer canvas of one comparative example of the present invention on the paper contact surface side, and FIG. 3B is a schematic cross-sectional view in the weft direction of the paper-making dryer canvas. FIG. 4A is a schematic view of the surface of the paper-making dryer canvas of the comparative example of the present invention on the paper contact surface side, and FIG. 4B is a schematic cross-sectional view of the paper-making dryer canvas in the weft direction. 5A shows the contact point (black point) between the surface of the paper contacting dryer canvas of Example 1 evaluated by the mark test and the paper, and FIG. 5B shows the contact side of the paper drying dryer canvas of Comparative Example 1. FIG. FIG. 5C shows the contact point (black spot) between the surface of the paper-contacting surface of the papermaking dryer canvas of Comparative Example 2 and the paper, and FIG. 5D shows the papermaking point of Comparative Example 3. This shows the contact point (black point) between the paper-contacting surface of the dryer canvas and the paper. FIG. 6 is a schematic cross-sectional view of the measuring apparatus used for the mark test. 7A to 7C are schematic cross-sectional views illustrating a 180 degree tape peeling test. 8A to 8F are schematic cross-sectional views of various knitting structures.

  In the present invention, the papermaking dryer canvas body is a woven fabric in which warps and wefts are woven. On the paper contact side of the paper dryer canvas body, a warp with a large wire diameter and a warp with a thin wire diameter are arranged. On all the wefts on the paper contact surface side, there are protruding points formed by the warp with a large wire diameter. To do. From the viewpoint of reducing the adhesion of dirt to the surface of the paper contact surface of the paper making dryer canvas, on the paper contact surface side of the paper making dryer canvas body, formed on the adjacent wefts by warps having a large wire diameter in an oblique direction. It is preferred that there are projected points. In the present invention, the “protrusion point” can be confirmed by observing the paper contact surface side with a microscope or the like. Or you may confirm indirectly by measuring a coloring point by a mark test so that it may mention later.

  In the present invention, when the cross-sectional shape of the yarn is a circular cross-section, the wire diameter of the yarn means a diameter, and when the cross-sectional shape of the yarn is an elliptical cross-section, the wire diameter of the yarn means a short diameter, and the cross-sectional shape of the yarn is In the case of a flat cross section, the wire diameter of the yarn means a short side. In the present invention, when the cross-sectional shape of the yarn is a circular cross-section, the width of the yarn means a diameter, and when the cross-sectional shape of the yarn is an elliptical cross-section, the width of the yarn means a long diameter, and the cross-sectional shape of the yarn is flat. In the case of a cross section, the width of the thread means the long side. In the present invention, unless otherwise indicated, the flat cross section means a flat cross section other than an elliptical cross section.

  The cross-sectional shape of the warp or weft weaving the paper dryer canvas body is not particularly limited, and may be any of a circular cross section, a flat cross section, and an elliptic cross section. In the case of a circular cross section, the diameter is preferably 0.2 to 1.2 mm, and more preferably 0.4 to 0.9 mm. In the case of a flat cross section, the long side (width) is preferably 0.4 to 1.2 mm, more preferably 0.4 to 0.7 mm, and the short side (wire diameter) is 0.2 to 0. 0.8 mm is preferable, and 0.2 to 0.6 mm is more preferable. In the case of an elliptical cross section, the major axis (width) is preferably 0.4 to 1.2 mm, more preferably 0.4 to 0.7 mm, and the minor axis (wire diameter) is 0.2 to 0.8 mm. It is preferable that the thickness is 0.2 to 0.6 mm. This makes it possible to improve the antifouling property while maintaining the uniformity of the surface of the paper making dryer canvas.

  From the viewpoint of reducing the adhesion of dirt to the surface of the papermaking dryer canvas main body, the diameter of the warp with the larger diameter is more than 1 and less than 2 times the diameter of the warp with the smaller diameter. It is preferable that Specifically, on the paper contact side of the papermaking dryer canvas body, from the viewpoint of reducing the adhesion of dirt to the surface, when the warp having a large wire diameter has a circular cross section, the wire of the warp having a large wire diameter is used. The diameter is preferably more than 1 and less than or equal to 2 times the wire diameter of the warp where the wire diameter is thin. In addition, from the viewpoint of reducing the adhesion of dirt to the surface of the paper contacting dryer canvas, when the warp with a large wire diameter has a flat cross section, the wire diameter of the warp with a large wire diameter is It is preferably more than 1 time and less than 2 times the wire diameter of the thin warp. In addition, from the viewpoint of reducing the adhesion of dirt to the surface of the paper contacting dryer canvas, when the warp having a large wire diameter has an elliptical cross section, the wire diameter of the warp having a large wire diameter is It is preferably more than 1 time and less than 2 times the thin wire diameter.

  From the viewpoint of reducing the adhesion of dirt on the surface of the papermaking dryer canvas body, the width of the warp with a large wire diameter is 1 to 2 times the width of the warp with a thin wire diameter. It is preferable. Specifically, from the viewpoint of reducing the adhesion of dirt to the surface of the papermaking dryer canvas body, when the warp having a large wire diameter has a circular cross section, the width of the warp having the large wire diameter is The wire diameter is preferably 1 to 2 times the width of the thin warp. In addition, from the viewpoint of reducing the adhesion of dirt on the surface of the papermaking dryer canvas body, when the warp having a large wire diameter has a flat cross section, the width of the warp having a large wire diameter is The diameter is preferably 1 to 2 times the width of the thin warp. In addition, from the viewpoint of reducing the adhesion of dirt to the surface of the papermaking dryer canvas main body, when the warp having a large wire diameter has an elliptical cross section, the width of the warp having a large wire diameter is The diameter is preferably 1 to 3 times the width of the thin warp.

  The number and arrangement of the warp yarns having a large wire diameter are not particularly limited on the paper-contacting surface side of the papermaking dryer canvas body. . From the viewpoint of reducing the adhesion of dirt to the surface of the paper contacting side of the paper making dryer canvas, one warp with a large wire diameter is regularly arranged for every 3 warps on the paper contacting side of the paper making dryer canvas body. It is preferable to do.

  In order to reduce the adhesion of dirt to the surface of the paper-making dryer canvas on the paper-contacting side of the paper-making dryer canvas body, one warp with a large wire diameter is regularly arranged per three warps. In this case, it is preferable that protruding points formed by warps having a large wire diameter in an oblique direction exist on adjacent wefts. Also, from the viewpoint of reducing the adhesion of dirt to the surface of the paper contacting dryer canvas, the distance between adjacent protruding points on the same weft (formed by thick warps) is 0.8 mm or more It is preferably 7 mm or less, and more preferably 2 mm or more and 6 mm or less. In addition, the distance between adjacent protruding points on the same warp (formed by a thick warp) is 1.6 mm or more from the viewpoint of reducing the adhesion of dirt to the surface of the paper contacting dryer canvas. It is preferably 6 mm or less, more preferably 2.2 mm or more and 3.4 mm or less. On the paper contact surface side of the papermaking dryer canvas body, the protrusion amount due to the protrusion point is more than 0 mm and 1.0 mm or less from the viewpoint of reducing the adhesion of dirt to the surface of the papermaking dryer canvas on the paper contact surface side. More preferably, it is more than 0 mm and 0.5 mm or less.

  The material of the warp or weft weaving the paper dryer canvas body is not particularly limited, and is one or more synthetic resins selected from the group consisting of polyesters such as polyethylene terephthalate, polyamides, polyphenylene sulfide, polyether ether ketone, and the like. It is preferable to include polyester such as polyethylene terephthalate from the viewpoint of durability. In addition, a monofilament yarn made of a synthetic resin, a multifilament yarn made of a synthetic resin, or the like can be used for both the warp and the weft. In the present invention, as the bonding core wire, a monofilament yarn, a multifilament yarn, or the like made of the same material as the warp or weft can be used.

  In the present invention, the number (density) of yarns per unit length of the dryer canvas body for papermaking is not particularly limited, but is preferably 8 to 130 warps / 2.54 cm, more preferably 40 to 130. Book / 2.54 cm. The weft is preferably 8 to 80 pieces / 2.54 cm, more preferably 30 to 60 pieces / 2.54 cm. Thus, the antifouling property can be improved while maintaining the uniformity of the surface of the papermaking dryer canvas body.

  The papermaking dryer canvas body may be a single weave or a multi-weave of double or more. Further, the woven structure is not particularly limited, and may be any other structure such as plain weave, twill weave, satin weaving, and change in weaving, and combinations thereof. Specifically, the woven structures listed in FIG. 8 can be used. 8A is a schematic cross-sectional view in the weft direction of a plain weave structure (horizontal single weave), FIG. 8B is a schematic cross-sectional view in the weft direction of a 1/2 weave structure (horizontal single weave), and FIG. FIG. 8D is a schematic cross-sectional view in the weft direction of the structure (horizontal double weave), FIG. 8D is a schematic cross-sectional view in the weft direction of the horizontal triple weave structure, and FIG. 8E is the weft direction in the 2/1 twill structure (horizontal single weave). 8F is a schematic cross-sectional view in the weft direction of a 2/1 twill structure (horizontal double weave), and FIG. 8G is a schematic cross-sectional view in the weft direction of a 2/2 twill structure (horizontal single weave). 8H is a schematic cross-sectional view in the weft direction of a 1/3 twill structure (horizontal single weave), FIG. 8I is a schematic cross-sectional view in the weft direction of a horizontal double weave structure, and FIG. FIG. 8K is a schematic cross-sectional view in the weft direction of a 1 twill 2 layer structure (horizontal single weave), and FIG. 8K shows a 3/1 twill structure (horizontal single weave). It is a cross-sectional schematic view of a weft direction Ri).

  The paper-making dryer canvas is not particularly limited. For example, a part of the warp yarn exposed by removing the weft from the end of the paper-making dryer canvas main body woven with warp and weft is folded, and the paper-making dryer canvas is used. A loop constituting a joint portion connecting both ends of the main body is formed, and a joint portion having a warp loop seam structure or a spiral seam structure can be produced by a normal method.

  Hereinafter, a paper making dryer canvas of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments.

  FIG. 1A is a schematic view of the surface of the paper-making dryer canvas of the embodiment of the present invention on the paper contact surface side, and FIG. 1B is a schematic cross-sectional view in the weft direction of the paper-making dryer canvas. As shown in FIGS. 1A and 1B, the papermaking dryer canvas body 1 is made by weaving a warp 11a having a large wire diameter, a warp 11b having a small wire diameter, and a weft 12, and a warp 3 on the paper contact surface side. One warp 11a with a large wire diameter is regularly arranged per book. As shown in FIGS. 1A and 1B, on all the wefts on the paper contact surface side of the papermaking dryer canvas body 1, the warp 11a having a large wire diameter forms a protruding point, and on the adjacent wefts There are protruding points formed by warps having a large wire diameter in an oblique direction. In the paper contacting side of the papermaking dryer canvas of the embodiment, the distance between adjacent protruding points (formed by a thick warp yarn) on the same weft is preferably 0.8 mm or more and 7 mm or less. Preferably they are 2 mm or more and 6 mm or less. The distance between adjacent protruding points on the same warp (formed by a warp having a large wire diameter) is preferably 1.6 mm or more and 6 mm or less, more preferably 2.2 mm or more and 3.4 mm. It is as follows. On the paper contact surface side of the papermaking dryer canvas body of the embodiment, the protrusion amount due to the protrusion point exceeds 0 mm and 1.0 mm from the viewpoint of reducing the adhesion of dirt to the surface of the papermaking dryer canvas on the paper contact surface side. Or less, more preferably more than 0 mm and 0.5 mm or less.

From the viewpoint of reducing the adhesion of dirt to the surface of the papermaking dryer canvas body of the present invention, there may be 7 or more and 315 or less coloring points per 150 mm ² when measured by a mark test. It is preferably 10 or more and 120 or less, more preferably 10 or more and 62 or less, and particularly preferably 12 or more and 20 or less. In the present invention, the mark test is performed as described later. The color development point measured by the mark test evaluates the contact point between the paper-contacting surface of the papermaking dryer canvas body and the paper.

  In this invention, a 180 degree | times tape peeling test is performed as it mentions later according to JISK6854. In the present invention, the tape peeling strength is evaluated as being less likely to adhere dirt on the canvas surface, that is, antifouling performance. The lower the tape peeling strength, the less likely dirt adheres to the canvas surface. Means high dirt performance.

  Hereinafter, the present invention will be described in detail based on examples. However, the present invention is not limited to the following examples.

Example 1
Polyethylene terephthalate (PET) monofilament (fineness: 3370 dtex, flat cross section, wire diameter (short side, same below) 0.44 mm, width (long side, same below) 0.57 mm) as warp 11a, polyethylene terephthalate (PET) as warp 11b ) Monofilament (fineness 2830 dtex, flat cross section, wire diameter 0.38 mm, long side 0.57 mm) and polyethylene terephthalate (PET) monofilament (fineness 6950 dtex, circular cross section, diameter 0.80 mm) as weft 12, FIG. As shown in FIG. 1B, the warp 11a and the warp 11b are regularly arranged so that one warp 11a is provided for every three warps on the paper contact surface side, and a 1/2 twill structure (horizontal double weave) is formed. A papermaking dryer canvas body 1 was prepared. The number (density) of yarns per unit length of the woven fabric was 48.3 yarns / 2.54 cm for warp yarns, and 30.7 yarns / 2.54 cm for weft yarns on both the paper contact side and the machine side. . On the paper contact side of the canvas of Example 1, the distance between adjacent protruding points on the same weft was 6.23 mm, and the distance between adjacent protruding points on the same warp was 5.80 mm. On the paper contact surface side of the canvas of Example 1, the protruding points on the adjacent weft yarns exist in an oblique direction.

(Comparative Example 1)
Polyethylene terephthalate (PET) monofilament (fineness 2830 dtex, flat cross section, wire diameter 0.38 mm, width 0.57 mm) as warp 21 and polyethylene terephthalate (PET) monofilament (fineness 6950 dtex, circular cross section, diameter 0.80 mm) as weft 22 2A and 2B was used to prepare a dryer canvas body 2 for papermaking having a 1/2 twill structure (horizontal double weave). The number (density) of yarns per unit length of the woven fabric was 48.3 yarns / 2.54 cm for warp yarns, and 33.4 yarns / 2.54 cm for weft yarns on both the paper contact side and the machine side. .

(Comparative Example 2)
Polyethylene terephthalate (PET) monofilament (fineness 2830 dtex, flat cross section, wire diameter 0.38 mm, width 0.57 mm) as warp 31 and polyethylene terephthalate (PET) monofilament (fineness 10960 dtex, circular cross section, diameter 1.0 mm) as weft 32a , Using polyethylene terephthalate (PET) monofilament (fineness 6950 dtex, circular cross section, diameter 0.80 mm) as the weft 32b, and as shown in FIGS. 3A and 3B, the wefts 22a and the wefts 22b are alternately arranged. A dryer canvas body 3 for papermaking having a twill structure (horizontal double weave) was produced. The number of yarns (density) per unit length of the woven fabric was 48.1 warps / 2.54 cm for warp yarns, and 30.9 yarns / 2.54 cm for wefts on both the paper contact side and the machine side. .

(Comparative Example 3)
Polyethylene terephthalate (PET) monofilament (fineness 3370 dtex, flat cross section, wire diameter 0.44 mm, width 0.57 mm) as the warp 41a, and polyethylene terephthalate (PET) monofilament (fineness 2830 dtex, flat cross section, wire diameter 0.38mm) as the warp 41b , Width 0.57 mm), polyethylene terephthalate (PET) monofilament (fineness 6950 dtex, circular cross section, diameter 0.80 mm) as weft 12, and as shown in FIG. 4A and FIG. The warp yarn 41a and the warp yarn 41b are regularly arranged so that there are two warp yarns 41a, and the dryer canvas body 4 for papermaking having a 1/2 twill structure (horizontal double weave) is produced. The number (density) of yarns per unit length of the woven fabric was 48.3 yarns / 2.54 cm for warp yarns, and 30.6 yarns / 2.54 cm for the weft yarns on both the paper contact surface side and the machine surface side. .

  The thickness of the dryer canvas body for papermaking in Examples and Comparative Examples and the protruding amount on the paper contact surface side were measured as follows, and the results are shown in Table 1 below. Moreover, the contact point of the paper contact surface side of the papermaking dryer canvas main body of the examples and comparative examples and the paper was evaluated by a mark test, and the results are shown in FIGS. 5A to 5D and Table 1. Furthermore, using the papermaking dryer canvas main body of Examples and Comparative Examples, the tape peeling strength on the surface of the papermaking dryer canvas main body on the paper contact surface side was measured by a 180-degree tape peeling test, and the results are shown in Table 1. Evaluates the difficulty of soiling on the canvas surface due to the tape peeling strength, that is, the antifouling performance. The lower the tape peeling strength, the harder it is to adhere to the canvas surface and the higher the antifouling performance. .

(Thickness and protruding amount on the paper contact side)
The thickness of the dryer canvas body for papermaking and the protruding amount on the paper contact surface side were measured using a microscope (manufactured by Hilox, product name “Hiscope Advanced”, model number “KH-3000V / VD”). The amount of protrusion on the paper contact surface side was obtained by measuring the distance between dotted line I and dotted line II in FIGS. 1B, 3B and 4B.

(Mark test)
A papermaking dryer canvas body was cut into a width of 100 mm and a length of 500 mm, and used as a sample 50 for a mark test. As shown in FIG. 6, an ultra-low pressure prescale 60 (made by Fuji Film Co., Ltd., two-sheet for ultra-low pressure) cut to the same size as the mark test sample on the surface of the mark test sample 50 on the paper contact surface side. Type “LLW”) is arranged so that the color development side of the ultra-low pressure prescale 60 is in contact with the mark test sample 50, and the mark test sample 50 and the prescale 60 are overlapped with each other by an arrow 90 between the rollers 70a and 70b. Passed in the direction shown. A linear pressure of 2 kgf / cm was applied to the roller 70 a in the direction indicated by the arrow 80. The color development point on the color development side of the ultra-low pressure prescale 60 represents the contact point between the paper-contacting surface of the papermaking dryer canvas and the paper.

(180 degree tape peeling test)
A 180 degree tape peeling test was conducted according to JIS K 6854. The papermaking dryer canvas body was cut to obtain a peel test sample 100 having a width (W1) of 70 mm and a length (L1) of 125 mm as shown in FIG. 7A. On the paper contact surface side of the peel test sample 100, a transparent adhesive tape 200 (made by Nichiban Co., Ltd., polyester tape, length (L2) 180 mm, extending from the end in the longitudinal direction to a length (La) of 80 mm and a width (W2) of 50 mm. ) Was affixed with a mark test roller machine (Daiwabo Progress Co., Ltd.). Although the transparent adhesive tape 200 is affixed, although not shown in the drawing, the sample between the peel test sample 100 and the transparent adhesive tape 200 is sandwiched between the rollers at a constant load (linear pressure 7.8 kg / cm) with two upper and lower rollers. The sample 100 for peeling test and the transparent adhesive tape 200 were adhered as shown in FIG. 7B. As shown in FIGS. 7B and 7C, the end of the transparent adhesive tape 200 opposite to the end of the peel test sample 100 is left 45 mm as the chucking margin, and the width ( W3) A paper 300 having a length of about 60 mm and a length (L3) of about 90 mm was pasted and folded back by 180 °. The sample 100 for peel test with the transparent adhesive tape 200 attached is gripped with a Tensilon tensile tester (Orientec, model number “RTC1310A”) so that the top and bottom are in the longitudinal direction, the distance between the grips is 100 mm, and the tensile speed is The tape peel strength was measured at 200 mm / min, with a tape peel distance of 50 mm. The tape peeling strength was integrated and averaged to determine the tape peeling strength.

  As can be seen from the results in Table 1, compared to Comparative Examples 1 and 2 in which the warp yarn diameter on the paper contact surface side is constant, a warp yarn having a large wire diameter and a warp yarn having a thin wire diameter are disposed on the paper contact surface side, The tape peeling strength is smaller in Example 1 in which protruding points formed by warps having a large wire diameter exist on all the wefts on the paper surface side. This means that stains hardly adhere to the canvas surface and the antifouling performance was high. Also, compared with Comparative Example 3, Example 1 has a smaller tape peeling strength. This also means that dirt hardly adheres to the canvas surface, and the antifouling performance is high. These are considered to be due to the fact that the canvas of Example 1 has fewer contact points between the paper contact surface and the paper than the canvases of Comparative Examples 1 to 3. In the case of Comparative Example 3, a warp with a large wire diameter and a warp with a thin wire diameter are arranged on the paper contact surface side, but a part of the weft on the paper contact surface side is formed by a warp with a large wire diameter. Since there is no protruding point, a line due to the concave portion is formed in the horizontal direction. As shown in FIG. 5D, the concave portion is also in contact with the paper although the size of the contact point is small.

1, 2, 3, 4 Papermaking dryer canvas body 11a, 11b, 21, 31, 41a, 41b Warp yarn 12, 22, 32a, 32b, 42 Weft 50 Mark test sample 60 Prescale 70a, 70b Roller 100 For peel test Sample 200 Transparent adhesive tape 300 Paper

Claims (6)

A papermaking dryer canvas comprising a papermaking dryer canvas body woven with warps and wefts,
A thick warp and a thin warp are arranged on the paper contact side of the paper dryer canvas main body, and all the wefts on the paper contact surface have protruding points formed by the warp having a large wire diameter. And
1. A papermaking dryer canvas characterized in that, on the paper contacting surface side of the papermaking dryer canvas body, one warp with a large wire diameter is regularly arranged for every three warps .   2. The paper-making dryer canvas according to claim 1, wherein on the paper-contacting surface side of the paper-making dryer canvas body, there are protruding points formed by warps having a large wire diameter in an oblique direction on adjacent wefts. In contact paper side of the papermaking drier canvas body, papermaking according wire diameter of the wire diameter is thick warp to claim 1 or 2, wherein the wire diameter is less than 1 Baikoe twice the wire diameter of the fine warp Dryer canvas. In contact paper side of the papermaking drier canvas body according to any one of the line diameter of claims 1 to width of the thick warp is less than 2 times 1 times the width of the thin warp the wire diameter is 3 Dryer canvas for papermaking. The paper-making dryer canvas according to any one of claims 1 to 4 , wherein a distance between adjacent protruding points on the same weft is 0.8 mm or more and 7 mm or less on the paper contact surface side of the paper-making dryer canvas main body. 6. The dryer canvas for papermaking according to any one of claims 1 to 5 , wherein the shortest straight line distance between adjacent protruding points on the same warp is 2 mm or more and 6 mm or less on the paper contact surface side of the papermaking dryer canvas body.

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