JPH11152694A - Industrial woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an industrial two-layer woven fabric not producing recesses on the surface of upper layer woven fabric, having many supporting points of fiber and excellent in surface smoothness. SOLUTION: In the industrial two-layer woven fabric comprising an upper layer woven fabric composed of upper layer warp and upper layer weft, lower woven fabric composed of lower layer warp and lower layer weft and a binding yarn for binding the upper layer woven fabric to the lower layer woven fabric, an auxiliary weft 10' woven by passing through the upper side of adjacent two or more upper layer warps is arranged between the upper layer wefts and these binding yarns 9 and 11' are arranged on both sides of the auxiliary weft 10' and these binding yarns 9 and 11' arranged both sides are binding yarns pass passing the upper side of adjacent two or more upper layer warps and the binding yarn is located on the upper side of upper layer warp in a part where the auxiliary weft 10 is located on the lower side of upper layer warp and in the binding yarns arranged on both sides, the other binding part is lowered to the lower position and located on the lower side of the lower layer warp in the part where either one binding yarn is located on the upper side of upper layer warp to form papermaking face and the other binding yarn is located on the upper side of upper layer warp in the part where either one binding yarn is located on the lower side of the upper layer warp.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a woven fabric for papermaking, a woven fabric for nonwoven fabric production, a woven fabric used for dewatering and squeezing of sludge, etc.
The present invention relates to industrial fabrics such as construction material production belts and conveyor belts, and more particularly to papermaking fabrics, especially papermaking fabrics.

[0002]

2. Description of the Related Art Conventionally used industrial fabrics include, for example, papermaking fabrics such as papermaking fabrics and papermaking canvases, nonwoven fabric fabrics, dewatered fabrics such as sludge, building material fabricating belts, and conveyor belts. There are things. Since these industrial fabrics run while receiving tension in the warp direction at the time of use, dimensional stability is required so that elongation and contraction in the width direction do not occur. In addition, running stability and posture stability are required so that meandering and wrinkling do not occur. In addition, since it is worn by contact with a driving roll or the like during traveling, wear resistance is also required. In addition, it is required that the surface be smooth in terms of placing and transporting or processing an object on the surface. Although such a problem is a common problem for industrial textiles, a satisfactory solution has not yet been achieved. Papermaking fabrics that require these performances most severely among industrial weaving gates, especially papermaking fabrics, are required to have the unique performances of papermaking described below in addition to the above performance. Since the problems common to most industrial fabrics and their solutions can be explained and understood, the present invention will be described below on behalf of papermaking fabrics.
The papermaking method is a well-known technique. First, a papermaking raw material containing pulp fibers or the like is formed endlessly from a head box, supplied between paper machine rolls, and supplied onto a running papermaking fabric. The side to which the raw material of the papermaking fabric is supplied is the papermaking surface, and the opposite side is the running surface. The supplied raw material is transported along with the travel of the papermaking fabric, and during the transport, moisture is removed by a dehydration device such as a suction box or a foil installed on the traveling surface side of the fabric to form wet paper. That is, the papermaking fabric functions as a kind of filter to separate pulp fiber and water. The wet paper web formed in the papermaking zone is then transferred to a press zone and a dryer zone. In the press zone, the wet paper web is transferred to and transferred to a papermaking felt, and is squeezed between the press rolls together with the papermaking felt by a nip pressure to further remove water. In the dryer zone, the wet paper web is transferred to a papermaking canvas, transported and dried to produce paper.

[0003] Papermaking fabrics are woven on a loom using warps and wefts such as synthetic resin monofilaments. To form an endless shape, it is formed endlessly by a known weaving seam, pin seam, or the like, or is formed endlessly at the stage of weaving by a bag weaving loom. In the case of bag weaving, the relationship between the warp and the weft is reversed between on the loom and during use. In the present specification, the warp is
The weft is a yarn extending in the machine direction of the papermaking machine, that is, in the traveling direction of the fabric, and the weft is a yarn extending in the machine direction of the papermaking machine, that is, in the width direction of the fabric.

There is a greater demand for papermaking fabrics, especially papermaking fabrics. Improvement of surface smoothness, prevention of wire mark on paper, improvement of papermaking yield, good ▲
▼ water-based, abrasion resistance, dimensional stability, running stability, etc. In recent years, with the increase in papermaking speed, the increase in neutral papermaking, the increase in the amount of filler used, and the cost reduction policy of papermaking companies, there is a strong demand for an early solution to the above requirements. When the papermaking speed increases, the dewatering speed naturally increases, and the dewatering power also increases. Since the papermaking raw material is dewatered through the papermaking fabric, moisture is removed through the mesh formed between the yarns of the papermaking fabric.
This mesh space is the water space. However, what is removed from the papermaking raw material is not only the water content, but also fine fibers and fillers, etc., come off together, and the papermaking yield is reduced. In addition, since the wet paper formed on the woven fabric is also pressed against the woven paper surface by the dewatering force, the yarn is hardly inserted into the wet paper in the portion where the yarn exists, and conversely, between the meshes where the yarn does not exist. There is a strong tendency that the wet paper web gets into the gap between the meshes and causes the formation of yarn and mesh marks on the surface of the wet paper web. Also,
Since the fibers are more stagnant between the meshes and the fiber density becomes excessively dense, the density of the fiber density is increased or decreased in the paper, and the thickness of the paper is reduced.

This is what is called a wire mark or a water mark. In addition, if the wetting of the woven fabric by the wet paper becomes large, or if the fibers are entrapped, the problem that the wet paper web removability when transferring the wet paper to the felt deteriorates also occurs. Although it is impossible to completely eliminate the wire mark, in order to make it as small and inconspicuous as possible, the papermaking surface of the woven fabric must be made fine to improve fiber supportability and smoothness. When the dehydration speed is increased and the dehydration power is increased, the fiber is easily removed and wire marks are significantly generated, so that further improvement is required. In addition, since the fibers are oriented in the running direction of the fabric, it is necessary to particularly improve the fiber support of the weft. In addition, excellent dewatering is required for good dehydration under high-speed conditions. If it has excellent water, it can reduce the vacuum pressure of dehydration, reduce the penetration and detachment of fibers between the meshes, eliminate the occurrence of wire marks, and improve the yield. It becomes possible. Also,
When the papermaking speed is increased, the water contained in the fabric is scattered by the centrifugal force at the roll rotating part and the like, and the water splash is generated. There is also a need to reduce the sexuality.

On the other hand, an increase in neutral papermaking has further increased the demand for improved wear resistance. Neutral papermaking uses calcium carbonate as a filler, and therefore, unlike clay used in acid papermaking, severely wears the yarn on the running surface. In addition, excess water due to the increase in papermaking speed and the decrease in water due to the retention of fibers makes the conditions even more severe. In order to improve the abrasion resistance, measures have been taken to change the fabric structure to a weft wear type structure or to change the material of the yarn.

In general, from the viewpoint of improving the abrasion resistance of the woven fabric in use and maintaining the posture stability, it is preferable that the weft of the woven fabric is given a wear resistance effect. Naturally, when the warp wears, the tensile strength decreases, the dimensions of the woven fabric increase, and when the warp is worn and cut, the woven fabric itself is cut off and its service life expires, so weft warp is prevented by the weft. is there. Attempts have also been made to use polyamide monofilaments having excellent abrasion resistance in the weft, but this attempt does not improve the structure of the woven fabric itself, but merely utilizes the properties of the material used. However, no epoch-making effect was obtained, and on the other hand, polyamide monofilaments had low rigidity, so that the fabric had poor posture stability. Attempts have been made to use a thick yarn for the weft on the running surface.However, there is a drawback in that the balance between the warp and the weft is lost, the crimping property is deteriorated, and wire marks are generated. Was. In order to prevent the generation of wire marks on paper, it is conceivable to increase the number density of warps and wefts and improve the supportability of the fibers. However, it is necessary to reduce the diameters of the warp and weft yarns. But,
In a well-known warp single weft double woven fabric generally used at present, there is a problem that abrasion resistance, rigidity, and posture stability decrease when the wire diameter is reduced. In this way, in the papermaking fabric, if the wire diameter is increased in order to improve the abrasion resistance and rigidity, the surface property is impaired, a wire mark is generated on the paper, and conversely, the wire diameter is increased in order to improve the surface property. When the number density is increased by reducing the thickness, the abrasion resistance and the rigidity are reduced.

The problem of wear resistance and posture stability is common to all industrial textiles that rotate endlessly.
In order to solve the above-mentioned problem, there has been attempted a woven fabric in which the papermaking surface side and the running surface side are configured using separate warps and wefts, respectively, and the woven fabrics of both layers are integrated by binding yarns. . That is, a dense papermaking surface is formed by using a warp and a weft having a small wire diameter on the papermaking side fabric, and a running having high wear resistance is performed by using a warp and a weft having a large wire diameter on the running surface side fabric. It forms a surface.

However, this has not always been satisfactory. This is because, at the binding portion where the binding yarn intersects with the yarn on the papermaking surface side, the binding yarn draws the papermaking surface side fabric toward the running surface side, so that a dent is generated on the papermaking surface side fabric surface, and the paper When this is done, the dent mark is transferred to the paper to generate a wire mark. Also, if the wire diameter of the binding yarn is reduced or the number of the binding yarns is reduced in order to minimize this dent, the binding force is weakened. It is said that the inner yarn is rubbed between the woven fabrics, and the binding yarn is cut or stretched and the binding force is further weakened, and a gap is generated or separated between the papermaking side fabric and the running surface side fabric. A problem occurred, and the service life of the device expired in a short time.

By the way, in order to effectively improve the fiber supportability and to produce high-quality paper without generating wire marks on the paper, it is necessary to preferably support the pulp fiber with the weft. This is because the pulp fibers supplied from the head box onto the papermaking fabric are generally oriented in the machine direction, that is, the warp direction. By supporting the fibers by separating the dents between the warps with the wefts, the fibers can be prevented from staying between the warps. However, it does not mean that the papermaking surface needs to be formed only by weft yarns. As long as it is a woven fabric, there is always a part where the warp is located above the weft, and since the warp and the weft form the same plane, it is possible to obtain a paper-making surface that has a smooth surface and does not generate wire marks. is there. It is necessary to improve the fiber support of the weft while forming the same plane.
In addition, as the papermaking speed increases, the tendency of instantaneous dewatering becomes even stronger, and as the conditions for papermaking fabrics become more severe year by year, the demand for increased rigidity, especially in the width direction, has become important. If the rigidity in the width direction is low, wavy wrinkles will occur during traveling, and the paper material will collect more in the concave parts of the wrinkles than in the convex parts, and naturally the paper in the concave parts will be thick and heavy, and the paper in the protruding parts will be thin As a result, the weight becomes uneven, and so-called BD defect occurs.

[0011]

SUMMARY OF THE INVENTION In view of the above problems, the present invention is configured such that the front side and the running side are formed by using different warps and wefts, respectively, and the fabrics of both layers are integrated by a binding yarn. In the industrial woven fabric, warping and weft yarns form the same plane at the intersection of the binding yarn and the yarn of the upper woven fabric at the intersection, and the number of support points is larger. An object of the present invention is to provide an industrial fabric, particularly a papermaking fabric, having good smoothness and further improved weft support.

[0012]

Means for Solving the Problems The present invention provides: 1. an upper fabric comprising an upper warp and an upper weft, a lower fabric comprising a lower warp and a lower weft, and a connecting fabric for connecting the upper fabric and the lower fabric. In an industrial two-layer fabric consisting of a binding yarn, auxiliary wefts that pass over the adjacent two or more upper warp yarns are arranged between the upper weft yarns, and binding yarns are arranged on both sides of the auxiliary weft yarns. The binding yarns arranged on both sides are binding yarns passing above two or more adjacent upper warp yarns, and the upper warp yarn is located at a portion where the auxiliary weft is located below the upper warp yarn. The binding yarns located on the upper side and on both sides are such that in a portion where one binding yarn is located above the upper layer warp and forms the papermaking surface, the other binding yarn is lowered. Is located below the lower warp, and one binding yarn is located below the upper warp. 1. A two-layer industrial woven fabric in which an auxiliary weft is disposed on an upper woven fabric, wherein the other binding yarn is located above the upper warp in the portion where the auxiliary woof is located. 3. The two-layer industrial fabric according to claim 1, wherein the binding yarn is mainly located above the upper warp in a portion mainly located on the side, and the auxiliary weft is arranged on the upper fabric. In a portion where one binding yarn is mainly located above the upper warp and forms a papermaking surface, the other binding yarn is lowered and mainly located below the lower warp, 3. In the portion where the binding yarn is mainly located on the lower side of the upper warp, the other binding yarn is mainly located on the upper side of the upper layer warp. 3. A two-layer industrial woven fabric in which an auxiliary weft passes above the two upper warps to form a papermaking surface. This is a repetition of a structure in which the lower three upper warps pass below the upper warp, in which the binding yarn passes through the lower side of the auxiliary weft.
4. The industrial fabric of a two-layer structure in which auxiliary wefts are arranged on the upper fabric, according to any one of the items 1 to 3, wherein the papermaking surface is formed by passing over the upper warp of the book. 5. This is a repetition of a structure in which the auxiliary weft passes through two upper warps to form a papermaking surface and then passes under three upper warps, and the binding yarn passes under the auxiliary weft. Pass above the three upper warps to form the papermaking surface, then pass between two adjacent upper warps and lower warps, then pass under two adjacent lower warps, Adjacent 2
5. The two-layer industrial woven fabric according to any one of items 1 to 4, wherein the auxiliary woof is disposed on the upper woven fabric, wherein the woven fabric passes between the upper warp and the lower warp. 6. 6. The two-layer industrial fabric according to any one of items 1 to 5, wherein the upper fabric has a plain weave structure, wherein auxiliary wefts are arranged on the upper fabric. 7. A single-layer woven fabric consisting of a warp and a weft, wherein a first auxiliary weft passing over and woven over two or more adjacent warps is disposed between the wefts, and a second auxiliary weft is formed of the first auxiliary weft. The second auxiliary wefts arranged on both sides and arranged on both sides of the first auxiliary weft are auxiliary wefts that are woven by passing over the adjacent two or more warps, and the first auxiliary weft is a warp. In the portion located on the lower side, the second auxiliary weft is located above the warp, and in the portion where one second auxiliary weft is located above the warp and forming the papermaking surface, the other second auxiliary weft is used. The weft is lowered and located below the warp,
A single-layer structure in which two types of auxiliary wefts are arranged, wherein the other auxiliary auxiliary weft is located above the warp in a portion where one second auxiliary weft is located below the warp Industrial fabric. 8. In a portion where the first auxiliary weft is mainly located on the lower side of the warp, the second auxiliary weft is mainly located on the upper side of the warp,
Item 9. An industrial fabric having a single-layer structure according to Item 7. 9. In a portion where one second auxiliary weft is located mainly on the upper side of the warp and forms a papermaking surface, the other second auxiliary weft is lowered and located mainly on the lower side of the warp, and one second auxiliary weft is located on the lower side of the warp. The auxiliary auxiliary weft is mainly located on the lower side of the warp, and the other second auxiliary weft is mainly located on the upper side of the warp. Industrial fabric of single layer structure with weft arranged. About. Hereinafter, the present invention will be described with reference to a papermaking fabric as described above.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, auxiliary wefts which pass over two or more continuous upper warps to form a papermaking surface are arranged between upper wefts of an upper fabric, and on both sides of the auxiliary wefts. A binding yarn that passes over two or more continuous upper warp yarns to form a papermaking surface and binds the upper and lower fabrics is arranged, and one of the binding yarns is positioned above the upper warp yarn. In the portion forming the papermaking surface, the other binding yarn is lowered and located below the lower warp, and in the portion where the one binding yarn is located below the upper warp, the other binding yarn is located Is located above the upper warp.

The auxiliary weft arranged between the upper wefts passes over the continuous two or more upper warps and is woven to form a papermaking surface, so that the fiber support of the weft is improved and the rigidity in the width direction is further improved. It also contributes to the improvement of Also, since the binding yarns arranged on both sides of the auxiliary weft are located as described above,
These three yarns alternately pass above the upper warp to form the papermaking surface, and the fiber support can be uniformly improved over the entire width direction. In addition, the binding yarn directly draws the upper warp downward, and the auxiliary weft also draws the upper warp downward as a result of being woven into the structure, so that the upper fabric can be drawn uniformly downward throughout the entire width direction. . In this way, the entire tissue is drawn down uniformly. Therefore, unlike the binding yarn which passes over one upper-layer warp for each of a plurality of conventional upper-layer warps and is bound for each of a plurality of repeating units, no worm-like dent is formed on the papermaking surface. . In addition, since two binding yarns are arranged between the upper wefts, the binding force is strong, and the adhesion between the upper and lower fabrics is good, so the binding yarns are rubbed between the two fabrics and internal wear occurs. Therefore, problems such as weakening of the binding force, generation of a gap between the two fabrics, and separation are not caused.

The structure of the auxiliary weft and the binding yarn is not particularly limited as long as it has the above-described structure. However, after the auxiliary weft passes over the two continuous upper warps and forms the papermaking surface, three auxiliary wefts are formed. Assuming that the weft passes through the lower side of the upper warp and is woven, and the binding yarn passes above the three upper warps in which the auxiliary weft passes below, the auxiliary The weft and the binding yarn can be arranged, and the fiber support can be uniformly improved over the entire width direction. That is, the auxiliary weft forms a crimp of two upper warps on the papermaking surface side, and the binding yarn forms a crimp of three upper warps. Further, the papermaking surface formed by the auxiliary weft and the binding yarn can be made the same plane, and the substantial fiber supporting efficiency can be exhibited most efficiently. Here, the crimp means a thread portion formed between the knuckles and protruding toward the papermaking surface or the running surface. Knuckle refers to the intersection of warp and weft. Originally, the crimp formed by the yarn is not actually formed horizontally and linearly, but protrudes like a bow. The amount of protrusion increases as the length of the crimp increases. Therefore, it is considered that it is difficult for the crimp of the auxiliary weft for two upper warps and the crimp of the binding yarn for three upper warps to protrude more to form the same plane, but it is difficult to form the same plane. By using the yarn forming the crimp as the binding yarn, the crimp is pulled further downward, and the same plane as the two crimps can be formed.

The binding yarn passes above the three upper warps, passes between the next three upper warps and the lower warp, and passes under the next lower warp. Next, assuming that the design passes between the three upper warps and the lower warps, the design becomes symmetrical about the crimp portion passing over the three upper warps and forming the papermaking surface, and one side of the crimp projects. It is preferable that the papermaking surface is formed efficiently and symmetrically without undulation or depression, and the smoothness is improved. Also, after passing the binding yarn above the three upper warps, it passes between the next three upper warps and the lower warp, and then passes under the next two lower warps, When the structure is such that the two upper layer warps and the lower layer warp pass through, there is an advantage that the woven position of the binding yarn and the lower layer warp is hardly rubbed and the weavability is stabilized. Details will be described in the embodiments with reference to the drawings. The structure of the upper layer fabric is not particularly limited, but a plain weave structure is preferable. The plain weave structure is a structure in which the warp and the weft are alternately woven one by one, and therefore has the largest number of fiber support points and good surface smoothness.

The upper woven fabric forms a smooth paper-making surface having a large number of fiber support points, and the auxiliary weft and the binding yarn improve the fiber support in the weft direction. In addition to the plain weave organization, there are the following organizations. The upper warp passing under the two consecutive upper wefts after passing over the two consecutive upper wefts,
A four-shaft woven fabric formed by sequentially displacing one upper weft and an upper warp passing over two successive upper wefts and then passing under three successive upper wefts are successively formed on the upper layer. It is a five-shaft woven fabric or the like formed by being shifted by three wefts. The structure of the four-shaft woven fabric is such that both the upper warp and the upper weft form only two crimps of the length, so that the crimp balance is good and the smoothness is good. Since the distance of the crimp formed on the papermaking surface is long, the fiber support of the weft is good. Also, the texture of the five-shaft woven fabric has no crimped portion of the upper warp between adjacent warps, so that there is no adjacent groove between warps in the warp direction. The properties are good. Needless to say, a 3-shaft, a 6-shaft or the like may be used. The lower woven fabric is not particularly limited, but a weft wear type structure is preferable from the viewpoint of wear resistance. The density of the number of yarns in the upper fabric is not particularly limited, and the lower warp or the lower weft may have a density of 1/2 to 2/3 of the upper fabric. However, the density of the lower weft is most preferably the same as that of the upper fabric, because it is related to abrasion resistance. If the amount is too small, the wear resistance is undesirably reduced.

The yarn used in the present invention can be freely selected according to the characteristics desired for the fabric, and is not particularly limited. For example, in addition to monofilaments, multifilaments, spun yarns, textured yarns such as crimping and bulking, bulky yarns, processed yarns generally referred to as stretcher yarns, mulled yarns, or twisted together Can be used. In addition, not only a circular shape but also a square shape, a star shape, a rectangular shape, a flat shape, an elliptical shape, a hollow shape and the like are used for the cross-sectional shape of the yarn. The material of the yarn can be freely selected, and polyester, nylon, polyphenylene sulfide, polyvinylidene fluoride polypropylene, aramid, polyether ether ketone, polyethylene naphthalate, wool, cotton, metal and the like are used. Needless to say, yarns obtained by blending various substances with copolymers or these materials according to the purpose may be used. In general, it is preferable to use a polyester monofilament having high rigidity and excellent dimensional stability for the upper layer warp, the lower layer warp, and the upper layer weft, and the wire diameter is small and the shower resistance, the fibril resistance, and the internal abrasion resistance are low. It is preferable to use a nylon monofilament for the required auxiliary weft and binding yarn. However, in consideration of the weaving property, it is preferable to use a polyester monofilament having high shape stability as the binding yarn. It is preferable to interweave polyester monofilaments and nylon monofilaments alternately in the lower weft requiring abrasion resistance, since the abrasion resistance can be improved while securing the rigidity. The wire diameter of the yarn can also be freely selected depending on the characteristics required for the papermaking fabric such as a mesh, and is not particularly limited. However, the auxiliary weft and the binding yarn are 60% of the wire diameter of the upper weft from the viewpoint of surface properties and the like. It is preferable that the wire diameter is 90% or less. Also, where it is originally one thread on the structure,
In the same structure, a plurality of yarns can be arranged in a line.
By arranging and arranging a plurality of threads having a small wire diameter, the surface property can be improved and the thickness of the woven fabric can be reduced.

[0019]

EXAMPLES The present invention will be described specifically with reference to examples.
FIGS. 1, 4, 5, and 6 are design diagrams showing a complete structure of an example of the present invention. The complete structure is the smallest repeating unit of the fabric structure, and the complete structure is connected vertically and horizontally to form the structure of the entire fabric. 2 is a partial plan view of the embodiment shown in FIG. 1 on the papermaking side, and FIG. 3 is a cross-sectional view taken along the weft of the embodiment shown in FIG. In the design drawings, the warp is indicated by Arabic numerals, for example, 1, 2, 3, and the weft is indicated by Arabic numerals with dashes, for example, 1 ', 2', 3 '. In addition, the mark x indicates that the upper warp is located above the upper weft, the mark ○ indicates that the lower warp is located below the lower weft, the black square ▼ indicates the auxiliary weft and The binding yarn is located above the upper warp, and the □ symbol indicates that the binding yarn is located below the lower warp. The upper and lower warps and wefts are arranged vertically.
In this example, since the number density is the same, the upper layer warp,
A lower warp and a weft are arranged immediately below the weft. In the design drawing, the yarns are exactly overlapped vertically, and the upper warp,
The lower warp and the weft are arranged immediately below the weft, but this is a matter of convenience in the drawing and may be shifted in an actual woven fabric.
Actually, in order to improve the adhesion between the upper fabric and the lower fabric to improve the rigidity and reduce the net thickness, the structure of the binding yarn is asymmetric (from the upper side of the upper warp to the lower side of the lower warp). In some cases, the inclination angle is made different between the left and right sides) to deliberately shift the overlap.

Example 1 FIG. 1 is a design diagram showing a complete structure of Example 1 of the present invention, and FIG.
Is a plan view showing a part of the papermaking surface, and FIG. 3 is a cross-sectional view along the weft. In the design drawing of FIG. 1, 1, 2, 3,
4, 5, 6, 7, 8, 9, and 10 are warp yarns, and upper and lower warp yarns are arranged one above the other and are indicated by the same numbers. 4 ', 8', 12 ', 16', 20 ', 24',
Reference numerals 28 ', 32', 36 ', and 40' denote wefts, and upper and lower wefts are arranged one above the other and are indicated by the same numbers. 2 ', 6', 10 ', 14', 18 ', 2
2 ', 26', 30 ', 34', 38 'are auxiliary wefts,
1 ', 3', 5 ', 7', 9 ', 11', 13 ', 1
5 ', 17', 19 ', 21', 23 ', 25', 2
7 ', 29', 31 ', 33', 35 ', 37', 3
9 'is a binding yarn. The design drawing shows that the upper woven fabric has a plain weave structure in which one upper warp and one upper weft are alternately woven up and down. Since the plain weave structure has the above configuration, a papermaking surface having the largest number of fiber support points and a very good surface smoothness can be obtained. The lower woven fabric is a weft abrasion type in which a crimp having a length of four lower warps is formed on the running surface side to prevent abrasion of the warp, and it is understood that the abrasion resistance is excellent. Next, looking at the auxiliary weft, for example, the auxiliary weft 10 ′ is composed of the upper warp 1, 2, 3 and the lower warp 1, 2,
3 and then pass above the upper warps 4 and 5, then pass between the upper warps 6, 7, 8 and the lower warps 6, 7, 8 and then pass above the upper warps 9, 10. Has passed. That is, it can be seen that the repetition is a structure in which the papermaking surface is formed by passing over the two upper warps and then passing below the three upper warps. The crimp is formed by passing over the upper two warp yarns adjacent to each other to form a paper-making surface, so that the fiber support of the weft is improved. And binding yarns 9 'and 11' are arranged on both sides of the auxiliary weft 10 '. The binding yarn 9 ′ passes between the upper warp 1 and the lower warp 1, then passes below the lower warp 2 and is not woven with the lower woven fabric, and then the upper warp 3, 4, 5 and the lower warp 3, 4. 5
, And then above the upper warp 6, 7, 8 and then between the upper warp 9, 10 and the lower warp 9, 10, the binding yarn 11 'is the upper warp 1, 2, 3 and then the upper warp 4, 5, 6 and the lower warp 4,
5, and then pass below the lower warp 7 without weaving with the lower fabric, and then pass between the upper warp 8, 9, 10 and the lower warp 8, 9, 10. Both of the binding yarns pass above the three adjacent upper warps to form crimps and form the papermaking surface, thereby improving the fiber support of the weft. In both binding yarns, the upper weft (4, 4) in which the auxiliary weft passes above to form the papermaking surface.
Upper layer warps other than 5 and 9, 10) (1, 2, 3 and 6, 7,
8) to form the papermaking surface. Also, 2
The binding yarns also pass above the different upper warp yarns, and one binding yarn is located above the upper warp yarn and forms a papermaking surface, and the other binding yarn is located below the upper warp yarn. It is located below the lower warp, and in a portion where one binding yarn is located below the upper warp, the other binding yarn is located above the upper warp. Therefore, a total of three yarns, the auxiliary weft and the binding yarn, alternately pass over the upper warp to form the papermaking surface, and the fiber support can be uniformly improved over the entire width direction. Further, in this embodiment, since the papermaking surface is formed by passing the upper side of all the upper warps, the fiber supportability can be improved most efficiently. Also from the plan view shown in FIG. 2, the upper warp and the upper weft are woven in a plain weave structure to form a papermaking surface with many fiber support points, and auxiliary wefts and binding yarns are arranged between the upper wefts. It can be clearly understood that any one of the yarns passes above the upper layer warp to form a crimp, thereby forming a papermaking surface having a good fiber supportability of the weft. From the cross-sectional view along the weft shown in FIG.
1 'alternately appear on the papermaking surface to form the same plane,
Further, it can be understood that the binding yarn 9 ′ is woven through the lower side of the lower warp 2 and the binding yarn 11 ′ is woven through the lower side of the lower warp 7 to function as a binding yarn. It can also be seen that the lower weft 12 'forms a crimp on the running surface side to protect the lower warp from abrasion. The upper weft 12 'was not shown because the drawing was complicated. Also, the upper warps 6, 7, 8 and the upper warps 1, 2, 3 where the binding yarn passes above and forms a crimp are directly connected by the binding yarn 9 'and the binding yarn 11'. It is pulled down below.
The upper warp yarns 4 and 5 and the upper warp yarns 9 and 10 where the auxiliary weft 10 ′ passes over and forms a crimp,
Since the upper warps 6, 7, 8 and the upper warps 1, 2, 3 are drawn downward by the binding yarn 9 'and the binding yarn 11', the upper warps 6, 7, 8 and the upper warps 1, 2, 3 are drawn. It can be understood that the auxiliary weft 10 ′ located below the inward is eventually pulled inward, and thus indirectly drawn downward. Therefore, the upper fabric can be uniformly drawn in over the entire width direction. In addition, the strength of pulling in the upper layer warp is naturally higher than the force of the binding yarn that directly draws in, so that the binding yarn sinks downward. However, in the present embodiment, the length of the crimp of the binding yarn is set to three longer than two of the auxiliary wefts. Therefore, if the pulling force is originally the same, the binding yarn with the longer crimp projects. Since the pulling force of the binding yarn is strong, the crimps of both yarns can be formed on the same plane. Also, the distance between the position where the structure of the binding yarn forms the crimp on the papermaking surface side and the position where it passes below the lower warp is the same for three warps (for example, the binding yarn 11 ').
If so, three warps 4, 5, and 6 and 8, 9, 10)
The structure is symmetrical about the crimp part. Therefore, it is possible to form a uniform paper-making surface symmetrically, without protruding or denting one side of the crimp.

Example 2 FIG. 4 is a design diagram showing a complete structure of Example 2 of the present invention. The relationship between the yarn and the code is the same as in the first embodiment. Wefts are 4 ', 8', 12 ', 16', 20 ', 24', 2
8 ', 32', 36 ', 40'. 2 ', 6', 1
0 ', 14', 18 ', 22', 26 ', 30', 3
4 ', 38' are auxiliary wefts 1 ', 3', 5 ', 7',
9 ', 11', 13 ', 15', 17 ', 19', 2
1 ', 23', 25 ', 27', 29 ', 31', 3
3 ', 35', 37 ', 39' are binding yarns. First, looking at the upper layer fabric, for example, the upper layer warp 2 is a structure that passes above two continuous upper layer wefts 4 and 8 and then passes below three continuous upper layer wefts 12, 16, and 20. The structure of the upper weft passes above one upper warp 1, then passes below one upper warp 2, then two upper warps 3,
It can be seen that the texture passes through the upper side of No. 4 and then passes below one upper layer warp 5. The upper fabric is formed as described above, and a crimp for two upper wefts of the upper warp and a crimp for two upper warps and one knuckle are formed on the papermaking side. I have. The crimps for the two upper wefts of the upper warp and the crimps for the two upper warps of the upper weft form the same plane of the papermaking surface to provide a smooth papermaking surface. The knuckle for one upper warp of the upper weft cannot be formed in the same plane because it is slightly lower than the two crimps, so that it cannot be formed on the same plane. However, it sufficiently contributes to the improvement of the fiber support of the weft. Also, the rigidity can be improved. Further, in this embodiment, as can be seen from the design diagram, there is no portion where the crimp portion of the upper warp is adjacent to the adjacent warp (for example, the crimp of the upper warp 1 is formed by the portions of the upper wefts 12 'and 16', Upper layer warp 2
Is formed at the upper wefts 4 'and 8' and is not adjacent to each other), so that the grooves in the warp direction between the upper warps are separated by the weft, and the fiber support of the upper weft is good. It is. Next, looking at the auxiliary weft, for example, the auxiliary weft 18 'is disposed above the upper warps 1, 2, 4, and 5, and forms crimps for two upper warps at two points. The binding yarns 17 'and 19' are arranged on both sides of the auxiliary weft 18 '. The binding yarn 17' passes over the upper warps 6 and 7 to form a crimp, and the lower warps 10 and 1 '. Without binding to the lower fabric, the binding yarn 19 'passes above the upper warps 9 and 10 to form a crimp and passes below the lower warps 5 and 6 and is not woven with the lower fabric. ing. Auxiliary weft and binding yarn both on paper side 2
The main crimp is formed, and the binding yarn is mainly located above the upper warp in the portion where the auxiliary weft is mainly located below the upper warp, and the binding yarns are also different from each other in the upper warp. In the portion where one binding yarn is mainly located above the upper layer warp and forms the papermaking surface, the other binding yarn is lowered downward and located below the lower layer warp. In the part where the binding yarn is mainly located below the upper warp, it can be seen that the other binding yarn is mainly located above the upper warp, and the fiber is uniformly distributed over the entire width direction. It can be understood that the supportability is improved.

Embodiment 3 FIG. 5 is a design diagram showing a complete structure of Embodiment 3 of the present invention. The relationship between the yarn and the code is the same as in the above-described embodiment. First, when looking at the upper fabric, the fabric of the upper fabric is a plain weave texture as in Example 1, and the number of fiber support points is the largest, and a papermaking surface with very good surface smoothness can be obtained. Next, when the auxiliary weft is examined, for example, the auxiliary weft 26 '
And crimps for two upper warps are formed in two places. And the auxiliary weft 26 '
Binding yarns 25 ′ and 27 ′ are arranged on both sides of the lower warp 8, and form a crimp by passing over the upper warp yarns 3 and 4. Without woven with the woven fabric, the binding yarn 27 'passes above the upper warp yarns 7 and 8 to form a crimp, and passes below the lower warp yarn 4 and is woven with the lower woven fabric. The auxiliary weft and the binding yarn both form two or more crimps on the papermaking surface side, and the binding yarn is located above the upper warp in a portion where the auxiliary weft is located below the upper warp, The binding yarns also pass above the different upper warp yarns, and in a portion where one binding yarn is located above the upper warp yarn and forms a papermaking surface, the other binding yarn is lowered and the lower warp yarn is lowered. It is understood that in the portion where one binding yarn is located below the upper warp, the other binding yarn is located above the upper warp, and over the entire width direction. It can be understood that the fiber support was uniformly improved.

Example 4 FIG. 6 is a design diagram showing a complete structure of Example 4 of the present invention. The relationship between the yarn and the code is the same as in the above-described embodiment. First, when looking at the upper fabric, the fabric of the upper fabric is a plain weave as in Example 1, and the papermaking surface with the largest number of fiber support points and very good surface smoothness can be obtained. Next, looking at the auxiliary weft, for example, the auxiliary weft 14 'is disposed above the upper warps 1, 2, 6, and 7, and forms crimps for two upper warps at two points. The binding yarns 13 ′ and 15 ′ are arranged on both sides of the auxiliary weft 14 ′.
3 ′ passes above the upper warps 3, 4, 5 to form a crimp, passes below the lower warps 9, 10 and is not woven with the lower fabric, and the binding yarn 15 ′ is the upper warp 8, 9, A crimp is formed by passing over the upper side of the lower layer 10 and is woven with the lower layer fabric by passing under the lower layer warps 4 and 5. Both the auxiliary weft and the binding yarn form two or more crimps on the papermaking side, and the binding yarn is mainly located above the upper warp in the part where the auxiliary weft is mainly located below the upper warp. , The binding yarns also pass above the different upper warp yarns, and one of the binding yarns is located mainly above the upper warp yarn and forms the papermaking surface in the other portion. Is located below the lower warp, and one binding yarn is mainly located below the upper warp, and the other binding yarn is mainly located above the upper warp. It can be understood that the fiber supportability is uniformly improved over the entire width direction.
By setting the structure of the binding yarn to the above-described structure, there is an effect that the position at which the binding yarn is woven with the lower layer weft is shifted during weaving, that is, the so-called cross-border problem is eliminated. The reason will be described below. For example, looking at the binding yarn 15 ′, it is woven below the lower warps 4 and 5. The position where the binding yarn and the lower warp are interwoven means that the warp 4 interweaves the lower warp 8 'from the lower side and then onward, and the warp 5 interweaves the lower warp 20' from the lower side. This is the part where the warp on the way to the upper part and the warp on the way to the lower part intersect. That is, the binding yarn is sandwiched between the two warps and fixed at that position, so that the weaving position does not shift.

FIG. 7 is a cross-sectional view along a weft showing the complete structure of a conventional two-layer papermaking fabric. The papermaking side fabric is formed in a plain weave structure. It can be clearly understood that only the portion of the warp yarn 1 on the papermaking side is drawn into the running surface side by the binding yarn 1 ′ to form the recess 41.

Comparative Test Next, the effect of the present invention will be described by showing a comparative test between the embodiment of the present invention shown in FIG. 1 and the conventional example shown in FIG. Table 1 shows the fabric composition and test results.

[0026]

[Table 1]

(Note) Sheet smoothness: A raw material pulp mixed with a medium paper is used, and the basis weight is 70 g / m ² using a Tappi standard sheet test machine.
A considerable amount of paper sheet was prepared, a smooth sheet was prepared according to a conventional method, and the smoothness of the paper in contact with the fabric surface was measured with a Beck smoothness meter. Wire mark: Judged visually. In the conventional example, the paper in the recessed portion due to the binding yarn becomes thick, and this thick portion appears as an oblique continuous black line. Such marks are not visible in the embodiment. Bonding strength: A sample having a width of 40 mm and a length of about 300 mm is prepared, and only a binding yarn is cut with a cutter so that a portion of about 80 mm in the longitudinal direction is separated from the papermaking side fabric and the running surface side fabric. To form a chuck mounting portion. Then, the separated portions of the paper-side fabric and the running-side fabric alone are attached to the chuck of the tensile tester, a load is applied, and the average strength when the unseparated portion is separated is measured. The measured value was converted per cm. In the examples, the bonding strength was so strong that the upper layer fabric was broken, and measurement was impossible.

[0028]

According to the industrial fabric of the two-layer structure of the present invention, no dent is generated on the surface of the upper fabric at the intersection of the binding yarn and the upper yarn, and the warp, weft, auxiliary weft and binding yarn are not formed. Forming the same plane, the papermaking surface is smooth, and the weft fiber support is very good, and it is possible to manufacture smooth paper without wire marks, strong binding force, good retention, high speed It has an excellent effect that it can respond to papermaking speed.

[Brief description of the drawings]

FIG. 1 is a design diagram showing a complete structure of Example 1 of the present invention.

FIG. 2 is a partial plan view of the embodiment shown in FIG.

FIG. 3 is a sectional view taken along the weft of the embodiment shown in FIG.

FIG. 4 is a design diagram showing a complete structure of Example 2 of the present invention.

FIG. 5 is a design diagram showing a complete structure of Example 3 of the present invention.

FIG. 6 is a design diagram showing a complete structure of Example 4 of the present invention.

FIG. 7 is a sectional view taken along a conventional weft thread.

[Explanation of symbols]

 1: Warp 2: Warp 3: Warp 4: Warp 5: Warp 6: Warp 7: Warp 8: Warp 9: Warp 10: Warp 4 ': Weft 8': Weft 12 ': Weft 16': Weft 24 ': weft 28': weft 32 ': weft 36': weft 40 ': weft 10: weft 2': auxiliary weft 6 ': auxiliary weft 10': auxiliary weft 14 ': auxiliary weft 18': auxiliary weft 22 ' : Auxiliary weft 26 ': auxiliary weft 30': auxiliary weft 34 ': auxiliary weft 38': auxiliary weft 1 ': binding yarn 3': binding yarn 5 ': binding yarn 7': binding yarn 9 ': Tying 11 ': Tying 13': Tying 15 ': Tying 17': Tying 19 ': Tying 21': Tying 23 ': Tying 25': Tying Thread 27 ': Binding thread 29': Binding thread 31 ': Binding thread 33': Binding thread 3 ': Binding yarn 37': binding yarn 39 ': binding yarn 41: dent

Claims (9)

[Claims] 1. An industrial two-layer fabric comprising an upper fabric consisting of an upper warp and an upper weft, a lower fabric consisting of a lower warp and a lower weft, and a binding yarn connecting the upper fabric and the lower fabric. Auxiliary wefts that pass over the upper two adjacent warp yarns and are woven are arranged between the upper weft yarns,
The binding yarns are arranged on both sides of the auxiliary weft, and the binding yarns arranged on both sides are binding yarns passing above two or more adjacent upper warps, and the auxiliary weft is an upper warp. Is located on the upper side of the upper warp in the part located on the lower side,
The binding yarns arranged on both sides are arranged such that, in a portion where one binding yarn is located above the upper warp and forms a papermaking surface, the other binding yarn is lowered and the lower side is below the lower warp. Located in
A two-layer structure in which an auxiliary weft is arranged on an upper fabric, wherein the other binding yarn is located above the upper warp in a portion where one binding yarn is located below the upper warp. Industrial fabric. 2. The upper woven fabric according to claim 1, wherein the binding yarn is mainly located above the upper warp in a portion where the auxiliary weft is mainly located below the upper warp. Industrial woven fabric with a two-layer structure with wefts arranged. 3. In a portion where one binding yarn is mainly located above the upper warp and forms a papermaking surface, the other binding yarn is lowered downward and is mainly located below the lower warp. 2. The part where one binding yarn is mainly located below the upper warp, and the other binding yarn is mainly located above the upper warp.
Or a two-layer industrial fabric according to 2, wherein the auxiliary weft is arranged on the upper fabric. 4. A repetition of a structure in which an auxiliary weft passes over two upper warp yarns to form a papermaking surface and then passes under three upper warp yarns. The two-layer structure according to any one of claims 1 to 3, wherein the weft yarn passes above the three upper warps passing below to form a papermaking surface. Industrial fabric. 5. A repetition of a structure in which an auxiliary weft passes through two upper warp yarns to form a papermaking surface and then passes under three upper warp yarns, wherein the binding yarn is an auxiliary weft. The papermaking surface is formed by passing over the upper three warp yarns passing below, then passing between two adjacent upper warp yarns and lower warp yarns, and then below the two adjacent lower warp yarns. The auxiliary weft is disposed on the upper layer fabric according to any one of claims 1 to 4, wherein the structure is a repetition of a structure which passes through the upper layer fabric and then passes between two adjacent upper layer warp and lower layer warp. Industrial fabric with two layers. 6. The two-layer industrial fabric according to claim 1, wherein the upper fabric has a plain weave structure, and auxiliary wefts are arranged on the upper fabric. 7. A single-layer woven fabric comprising a warp and a weft, wherein a first auxiliary weft, which is woven by passing over two or more adjacent warps, is disposed between the wefts, and a second auxiliary weft is provided. The second auxiliary wefts arranged on both sides of the first auxiliary weft and the second auxiliary wefts arranged on both sides of the first auxiliary weft are auxiliary wefts that are woven by passing over two or more adjacent warps, In the part where the auxiliary weft is located below the warp, the second auxiliary weft is located above the warp, and in the part where one second auxiliary weft is located above the warp and forms the papermaking surface The other second auxiliary weft is lowered and located below the warp, and in the portion where one second auxiliary weft is located below the warp, the other second auxiliary weft is located above the warp. An industrial fabric having a single-layer structure in which two types of auxiliary wefts are arranged. 8. The single-layer industrial use according to claim 7, wherein the second auxiliary weft is mainly located above the warp in a portion where the first auxiliary weft is mainly located below the warp. fabric. 9. In a portion where one second auxiliary weft is mainly located above the warp and forms a papermaking surface, the other second auxiliary weft is lowered and mainly located below the warp. In a portion where one second auxiliary weft is mainly located below the warp, the other second auxiliary weft is mainly located above the warp,
An industrial woven fabric according to claim 7 or 8, wherein two types of auxiliary wefts are arranged on the woven fabric.