JP4063987B2 - 2-layer fabric for papermaking with auxiliary weft arranged on the fabric side - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a papermaking fabric, and more particularly to a papermaking fabric.
[0002]
[Prior art]
The papermaking method is a well-known technique. First, a papermaking raw material containing pulp fibers and the like is formed endlessly from a head box, placed between rolls of a papermaking machine, and supplied onto a running papermaking fabric. The side on which the raw material for the papermaking fabric is supplied is the papermaking surface, and the opposite side is the running surface.
The supplied raw material moves with the traveling of the papermaking fabric, and during the movement, moisture is removed by a dehydrating device such as a suction box or a foil installed on the traveling surface side of the fabric to form a wet paper web. That is, the papermaking fabric functions as a filter and separates pulp fibers and water.
The wet paper formed in this papermaking zone is then transferred to the press zone and the dryer zone.
In the press zone, the wet paper is transferred by a papermaking felt and squeezed together with a papermaking felt by a nip pressure between press rolls, and further moisture is removed. In the dryer zone, the wet paper is transported by a papermaking canvas and dried to produce paper.
[0003]
Papermaking fabrics are woven with a loom using warps and wefts such as synthetic resin monofilaments. In order to form it endlessly, it is formed endlessly by a known weaving joint, pin seam or the like, or endlessly formed by a bag weaving machine at the stage of weaving.
In the case of bag weaving, the relationship between warp and weft is reversed on the loom and in use.
In this specification, the warp is a yarn extending in the machine direction of the papermaking machine, that is, the fabric traveling direction, and the weft is a thread extending in the cross machine direction of the papermaking machine, that is, the width direction of the fabric.
[0004]
There are more demands than ever for papermaking fabrics, especially papermaking fabrics.
These include improved surface smoothness, prevention of paper wire mark generation, improved papermaking yield, good drainage, wear resistance, dimensional stability, and running stability.
In recent years, with the increase in papermaking speed, the increase in neutral papermaking, the increase in the amount of filler used, and the paper company's cost reduction policy, an early solution to the above demand is strongly desired.
[0005]
When the papermaking speed is increased, the dehydration speed is inevitably increased and the dehydration power is increased. Since the papermaking raw material is dehydrated through the papermaking fabric, moisture is removed through the mesh formed between the yarns of the papermaking fabric. This is the drainage space.
However, not only moisture but also fine fibers and fillers are removed together from the papermaking raw material, and the retention (papermaking yield) decreases. Also, the wet paper that remains on the fabric is pressed against the surface of the paper by the dehydration force, so the yarn is difficult to wet in the part where the yarn is present, and conversely between the meshes where the yarn is not present The wet paper is difficult to get between the meshes, and threads and mesh marks are generated on the surface of the wet paper.
[0006]
Further, since the fibers are more retained between the meshes, the fiber density becomes excessively dense, and the density of the fiber density is also generated. This is called a wire mark or drainage mark. In addition, if the fiber stays, the drainage decreases and excessive dehydration is required, resulting in a vicious cycle, which affects the paper quality such as paper formation and printing suitability.
In addition, when the wet paper becomes deeper or when the fibers are caught, the wet paper peelability when the wet paper is transferred to the felt also deteriorates. Although it is impossible to eliminate the wire mark completely, in order to make it as small and inconspicuous as possible, the paper-making surface of the fabric must be made fine to improve the fiber support and smoothness.
When the dehydration speed becomes high and the dehydration power becomes strong, naturally, the occurrence of fibers and the occurrence of wire marks become conspicuous, so further improvement is necessary.
Further, since the fibers are oriented in the running direction of the woven fabric, it is very important to improve the fiber support of the weft yarn.
[0007]
Also, excellent drainage is required for good dehydration under high-speed conditions. If it has excellent freeness, the vacuum pressure of dehydration can be suppressed, and the above-mentioned fibers are not trapped or pulled out, the occurrence of wire marks can be eliminated, and the retention can be improved. It is.
In addition, when the paper making speed is increased, water contained in the fabric is scattered by the roll rotating part and the like, and the water spray is generated. It is also required to reduce the water retention of the fabric.
[0008]
On the other hand, the increase in neutral papermaking has further increased the demand for improved wear resistance. Neutral papermaking often uses calcium carbonate as a filler, which severely wears the yarn on the running surface. In addition, excessive dehydration accompanying the increase in papermaking speed and the decrease in freeness due to fiber retention makes the conditions more severe.
In order to improve the wear resistance, measures are taken such as changing the fabric structure to a weft-worn type structure or changing the material of the thread.
[0009]
In general, from the standpoint of improving the wear resistance and maintaining the posture stability of the woven fabric in use, it is preferable to give the weft yarn of the woven fabric a wear resistance action. Naturally, when the warp is worn, the tensile strength is lowered, the dimension of the fabric is increased, and when the warp is worn and cut, the fabric itself is cut and the service life is exhausted. Attempts have also been made to use polyamide monofilaments with excellent wear resistance in wefts, but this attempt does not improve the structure of the fabric itself, but simply utilizes the properties of the materials used. Thus, the epoch-making effect was not obtained, and on the other hand, the fabric using the polyamide monofilament had a drawback of poor posture stability. Attempts have also been made to use thick yarn for the weft on the running surface. However, there is a problem in practical use due to the disadvantage that the balance between the warp and the weft is lost, the crimping property is deteriorated and the wire mark is generated. It was.
[0010]
In order to prevent the occurrence of paper wire marks, it is conceivable to increase the number density of warps and wefts and improve the support of the fibers. To that end, it is necessary to reduce the diameters of the warps and wefts.
However, in a well-known warp / single weft / double woven fabric generally used at present, the wear resistance, rigidity, and posture stability are reduced when the wire diameter is reduced.
In this way, the papermaking fabric loses surface properties when the wire diameter is increased in order to improve wear resistance and rigidity, and wire marks are generated on the paper. When the wire diameter is reduced and the number density is increased, the wear resistance and rigidity are lowered, so there is a conflicting problem.
[0011]
In order to solve the above-mentioned problems, an attempt has been made with a woven fabric in which the papermaking surface side and the traveling surface side are configured using separate warp and weft yarns, and the fabrics of both layers are integrated by binding yarns. Yes. In other words, a warp and weft with a small wire diameter are used for the fabric on the paper surface side to form a dense paper making surface, and a warp and weft with a large wire diameter are used for the fabric on the running surface side for running with high wear resistance. A surface is formed.
However, this was not always satisfactory. This is because, in the binding portion where the binding yarn intersects with the yarn on the paper surface side, the binding yarn pulls the paper surface side fabric toward the running surface side, so that a dent is generated on the paper surface side fabric surface, and the paper actually When the paper is drawn, the dent mark is generated as a wire mark so as to be transferred to paper.
[0012]
In addition, if the wire diameter of the binding yarn is reduced or the number of binding yarns is reduced in order to reduce this dent as much as possible, the binding force will be weakened. There is a problem that internal wear occurs between the surface side fabrics and the binding force is weakened, resulting in a gap or separation between the paper surface side fabric and the running surface side fabric. The service life has expired.
By the way, in order to effectively improve the fiber support and to produce a high quality paper without generating a wire mark on the paper, it is important to support the fiber with a weft.
This is because the pulp fibers generally supplied from the head box onto the papermaking fabric are oriented in the machine direction, that is, the warp direction. By supporting the fiber by dividing the recess between the warp yarns with the weft yarn, the fibers are prevented from staying between the warp yarns.
[0013]
[Problems to be solved by the invention]
In view of the above problems, the present invention is a woven fabric in which the papermaking surface side and the traveling surface side are configured using separate warps and wefts, and the woven fabrics of both layers are integrated by binding yarns. At the intersection of the binding yarn and the yarn on the paper surface side, an attempt is made to provide a paper fabric having no surface dents, good surface smoothness and improved weft fiber support. Is.
[0014]
[Means for Solving the Problems]
The present invention
“1. a paper surface side fabric composed of a paper surface side warp and a paper surface side weft, a traveling surface side fabric composed of a traveling surface side warp and a traveling surface side weft, and an auxiliary weft disposed between the paper surface side wefts, In the two-layer woven fabric for papermaking, the papermaking surface side fabric repeats a structure that passes through the upper side of three papermaking surface side warps where papermaking surface side wefts continue and then passes under one papermaking surface side warp. It is a twill weave structure, and the auxiliary weft is the first paper side warp between the paper side wefts and the two paper side side wefts adjacent to each other. From the upper side of the papermaking side weft to the lower side of the next papermaking side weft, the other papermaking side warp crosses each other from the lower side of the first papermaking side weft to the upper side of the next papermaking side weft A pair is formed between the wefts on the paper-making side to be spread, and each auxiliary weft forming the pair is alternately manufactured. It passes over the upper side of two or more paper-making side warps that appear on the surface, and goes down to the running surface side where it does not appear on the paper-making side, and is interwoven with the running surface-side warp to make the paper-making side fabric and running surface. A two-layer fabric for papermaking, in which auxiliary wefts are arranged on the fabric on the paper surface side, wherein the side fabrics are connected.
2. The auxiliary weft of each paper weave side passes through the upper side of the four continuous paper side warps and forms a structure that passes through the upper side of all the paper side warps in one set. 2-layer fabric for papermaking with weft arranged.
3. 3. A two-layer woven fabric for papermaking, wherein the running surface side warp is a woven weave structure in which two parallel warps are arranged in parallel and has a plain weave structure, and auxiliary wefts are arranged on the paper surface side woven fabric according to item 1 or 2. ".
[0015]
The papermaking surface side fabric of the papermaking fabric of the present invention is a repeating structure in which the papermaking surface side weft passes through the upper side of three continuous papermaking surface side warps and then passes through the lower side of one papermaking surface side warp. A twill weave structure.
Because the weft yarn on the paper side forms a long crimp of three continuous warp yarns on the paper side, the fiber support of the weft yarn is very good. Is inconspicuous.
When the paper surface side fabric has the above-mentioned structure, one paper surface side warp is next to the next from the upper side of the first paper surface side weft between two adjacent paper surface side wefts. A part where the other papermaking side warp crosses from the lower side of the first papermaking side weft to the upper side of the next papermaking side weft is formed at every weft interval. However, in the present invention, a pair of auxiliary wefts are arranged in that position to make the papermaking wider. The gap between the surface side wefts is compensated to form a uniform papermaking surface.
[0016]
Further, the crossing portion is also a portion where the paper surface side weft is woven from the paper surface side by the paper surface side warp, and a portion having a large dent is continuously formed, but in the present invention, the auxiliary weft is compensated for the dent. It was placed on the paper surface side warp to improve smoothness and to improve the fiber support of the weft.
Originally, the same plane of the papermaking surface is formed with auxiliary wefts instead of the papermaking surface side warps that should form the same plane as the papermaking surface side wefts.
Further, since two or more continuous paper side warps are formed on the auxiliary weft, the fiber support of the weft can be efficiently exhibited. The papermaking surface is formed substantially only by the yarns in the weft direction.
Furthermore, in the present invention, the individual auxiliary wefts forming the pair alternately appear on the papermaking surface, and in the portion not appearing on the papermaking surface side, the auxiliary wefts are lowered to the traveling surface side and interwoven with the traveling surface side warp to travel with the papermaking surface side fabric. It formed so that the surface side textiles might be connected.
[0017]
That is, the auxiliary weft according to the present invention has both the original function of the auxiliary weft and the function of the binding yarn. By forming a set of auxiliary wefts in this way, it is possible to arrange auxiliary wefts that are substantially continuous on the papermaking surface side.
That is, by forming a structure for one auxiliary weft on the paper-making surface side with a set of two auxiliary wefts, one auxiliary weft can be arranged.
When a crimp for four continuous papermaking side warps is formed by forming individual auxiliary wefts, a set of two auxiliary wefts can form a structure that passes above all papermaking side warps. The fiber support can be exhibited most efficiently.
[0018]
As described above, in the conventional two-layer papermaking fabric, the binding yarn draws the papermaking surface side fabric toward the running surface side, so that a dent is generated on the surface of the papermaking surface side fabric. The problem of generating the wire mark as a wire mark so as to be transferred onto paper could not be solved.
The conventional binding yarn of a two-layer woven fabric for papermaking has had an adverse effect that it appears in dots at positions where the original yarn does not exist on the papermaking surface side fabric and draws in the papermaking surface to generate a dent. In this case, the auxiliary weft and the binding yarn are the same yarn, and the position where the auxiliary weft appears on the paper-making side and fulfills the function of the auxiliary weft is the binding portion. Therefore, there is no adverse effect as in the conventional binding yarn.
[0019]
In the present invention, one of the characteristics is that the force for connecting the paper surface side fabric and the running surface side fabric is strong. In the present invention, since two binding yarns exist as a set, the binding force is stronger than in the case of one conventional yarn.
Further, in contrast to the conventional method of weaving with a single papermaking side warp, the present invention is further strengthened because it is interwoven with a plurality of papermaking side warp.
When the binding force is increased, the binding yarn as described above is not entangled between the paper surface side fabric and the running surface side fabric and internal wear does not occur, and a gap is generated between the fabrics or separated. The problem of end up does not occur.
[0020]
If the individual auxiliary wefts forming the set are made of auxiliary wefts of the same structure that are shifted by several warps, the force with which each auxiliary weft pulls the fabric on the paper side becomes equal, so the smoothness of the paper surface is good It is preferable.
In addition, if the auxiliary weft is formed so as to be pulled in every repeating unit (repeating unit when the auxiliary weft is formed with one piece) in the portion functioning as the auxiliary weft on the paper-making side, the repeating unit of the weft on the paper-making side Since the papermaking surface can be drawn in the same condition for each repeating unit, which is the smallest unit, the entire papermaking surface can be formed uniformly and smoothly, which is preferable.
[0021]
For example, the repeat unit of each auxiliary weft is double the repeat unit of the weft on the paper side (same as the repeat unit of the auxiliary weft when one auxiliary weft is formed), and each auxiliary weft is on the paper side A structure of one repeating unit of the paper surface side weft is formed, and the two auxiliary wefts cooperate to form an auxiliary weft structure of two repeating units of the paper surface side weft on the paper surface side. To do.
[0022]
The running surface side fabric is not particularly limited, but a weft wear type structure having good wear resistance is preferable.
However, it is preferable to adopt a plain weave structure when it is required that the net thickness is thin as in the case of tissue production or the like. A warp weave structure may be used in which a plurality of warps are arranged in the same structure.
Conventionally, as a papermaking fabric for tissue production, a single-woven fabric has been used taking advantage of its thin net thickness and high freeness. However, it is becoming impossible to cope with the increasing mechanical load of paper machines with high production capacity in recent years, and a paper fabric with high rigidity is desired. Further, since the fibers are oriented in the warp direction more than the plain paper and the fiber length is long, the fiber support of the weft is very important.
Therefore, two-layered fabrics that use conventional single-woven fabrics as the upper layer fabrics and two-layered fabrics of the ground yarn binding type have been tried, but internal wear and delamination due to insufficient binding force. However, satisfactory results have not been obtained due to the problem of surface quality deterioration of the ground yarn binding portion.
[0023]
In addition, in order to increase the number of wefts on the paper-making side and improve the fiber support in the weft direction, the conventional double-layered woven fabric uses a twill weave structure on the paper-making side fabric, but the oblique pattern is tight and the wire There was a problem that the mark was conspicuous and that the fabric in the diagonal direction was different on the left and right, and the fabric tended to deform into a diamond shape. In the broken twill weave structure, a large number of wefts cannot be driven in the structure, and a desired number of wefts cannot be obtained.
As described above, the present invention employs a broken twill weave structure in which the diagonal marks are not continuous and the wire marks are not conspicuous as the paper surface side fabric because the auxiliary wefts are arranged as described above, and the auxiliary wefts are arranged. However, a sufficient fiber support in the weft direction can be secured, and the structure of the running surface side fabric is a thin mesh structure, which is particularly suitable as a papermaking fabric for tissue production.
The density of the number of yarns for the paper surface side fabric is not particularly limited, and the traveling surface side warp and the traveling surface side weft may be ½ or 2/3 of the paper surface.
[0024]
The yarn used in the present invention can be freely selected depending on the properties desired for the papermaking fabric and is not particularly limited. For example, in addition to monofilament, multifilament, spun yarn, crimped or bulky processed textured yarn, bulky yarn, processed yarn called stretch yarn, mould yarn, or these are combined. Combined yarns can be used. In addition, the cross-sectional shape of the thread is not limited to a circle, but a rectangular thread such as a square or star shape, an elliptical thread, a hollow thread, etc. can be used. The thread material can also be freely selected, such as polyester, nylon, Polyphenylene sulfide, polyfluorinated vinylidene, polypro, aramid, polyetheretherketone, polyethylene naphthalate, cotton, wool, metal and the like can be used. Of course, you may use the thread | yarn which blended and contained various substances according to the objective to these copolymers or these materials.
[0025]
In general, it is preferable to use a polyester monofilament having rigidity and excellent dimensional stability for the paper surface side warp, the traveling surface side warp, and the paper surface side weft. The auxiliary weft is preferably made of nylon monofilament because the wire diameter is small and shower resistance, fibrillation resistance, and wear resistance against internal wear described above are required. Further, it is preferable to interweave polyester monofilaments and nylon monofilaments on the running surface side wefts that require abrasion resistance, such as by alternately arranging polyester monofilaments and nylon monofilaments, because the abrasion resistance can be improved while ensuring rigidity.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings.
1 and 2 are design diagrams showing a complete structure of an embodiment of the present invention.
The complete structure is a minimum repeating unit of the woven structure, and this complete structure is connected vertically and horizontally to form the entire structure of the woven fabric.
In the design drawing, warps are indicated by Arabic numerals, for example 1, 2, 3, and wefts are indicated by Arabic numerals with dashes, for example, 1 ', 2', 3 '.
In addition, the X mark indicates that the paper surface side warp is positioned above the paper surface side weft, the ○ mark indicates that the traveling surface side warp is positioned below the traveling surface side weft, and ▲ A black square mark ▼ indicates that the auxiliary weft is positioned above the paper surface side warp, and a □ mark indicates that the auxiliary weft is positioned below the running surface side warp.
[0027]
The warp and weft yarns on the papermaking surface side and the running surface side are arranged one above the other. In this embodiment, since the number density is the same, the warp and weft on the running surface side are arranged directly below the warp and weft on the papermaking surface side.
It should be noted that in the design drawing, the warp on the paper surface side and the warp on the running surface side, and the weft on the running surface side are arranged just below the weft, with the yarns accurately overlapping in the vertical direction. In an actual fabric, it may be displaced.
[0028]
Example 1
FIG. 1 is a design diagram showing the complete structure of Example 1 of the present invention.
In the design diagram of FIG. 1, 1, 2, 3, 4, 5, 6, 7, and 8 are warps, and the paper surface side warp and the running surface side warp are arranged vertically.
1 ', 4', 5 ', 8', 9 ', 12', 13 ', 16' are wefts, the paper surface side wefts are arranged on the upper side, and the paper surface side wefts are half the density of the running surface side wefts. 1 ', 5', 9 'and 13' are arranged below.
2 ', 3', 6 ', 7', 10 ', 11', 14 ', 15' are auxiliary wefts, 2 'and 3', 6 'and 7', 10 'and 11', 14 ' Each of 15 'forms a set.
From the design drawing, it can be seen that the present embodiment is a 16-shaft fabric together with the paper-making surface side fabric and the running surface side fabric.
[0029]
First, looking at the paper surface side fabric, the paper surface side weft passes below the one paper surface side warp, then passes above the three paper surface side warps, and then one paper surface side warp. A structure that passes through the lower side and then passes through the upper side of the three papermaking surface side warps, passes through the upper side of the three consecutive papermaking surface side warps, and then passes through the lower side of one papermaking surface side warp. It can be seen that the paper surface side warp passes through the lower side of the three continuous paper side wefts and then passes over the upper side of one paper surface side weft. I understand that. Further, the shift of the paper surface side warp is shifted from the paper surface side warp 1 to the paper surface side warp 2 by one paper surface side weft, and the paper surface side warp 3 to the paper surface side warp 4 is the paper surface side weft. It is shifted upward by one, and it can be seen that it is a broken twill.
In the design drawing, the complete structure of the four-shaft broken twill weave paper side fabric is arranged in a total of four, arranged vertically and horizontally.
[0030]
Next, looking at the auxiliary wefts, for example, 6 'and 7' are between the paper surface side wefts 5 'and 8', and the adjacent two paper surface side warps 1 and 2 are the two adjacent paper products. Between the surface side wefts, one papermaking side warp 2 goes from the upper side of the first papermaking side weft 5 'to the lower side of the next papermaking side weft 8', and the other papermaking side warp 1 is the first papermaking. It can be seen that they are arranged in a portion that extends from the lower side of the surface-side weft 5 'to the upper side of the next paper-making-side-side weft 8' and crosses each other.
The individual auxiliary wefts 6 'are arranged above the paper surface side warps 8, 1, 2, 3 to form a crimp for four paper surface side warps, and also form a pair with the auxiliary wefts 6'. The auxiliary weft 7 'is arranged above the paper surface side warps 4, 5, 6, 7 to form a crimp for four paper surface side warps.
Then, the auxiliary wefts 6 'and 7' forming the set cooperate to form a crimp on the upper side of all the paper surface side warps to form a structure substantially equivalent to one auxiliary weft.
[0031]
The portion where these auxiliary wefts are arranged is the portion where the concave papermaking surface weft 5 'passes between the crimps of the papermaking surface side weft 5' and the papermaking surface. Since the paper surface side weft 8 'which is recessed between the crimps of the side wefts 8' is a portion where the paper surface side warp 1 and the portion passing through the lower side of 5 are obliquely continuous and greatly recessed, It can be clearly understood that the paper surface is smoothed by filling.
Further, the auxiliary weft thread 6 'passes the lower side of the running surface side warps 5, 6 and the auxiliary weft thread 7' passes the lower side of the running surface side warps 1, 2 to connect the paper surface side fabric and the running surface side fabric. It functions as a binding yarn.
Further, both the auxiliary wefts 6 'and 7' pass through the upper side of the four paper side warps and pass under the two running side warps. It can be seen that this is an auxiliary weft of the same structure.
[0032]
In addition, the auxiliary weft structure of substantially one paper on the paper surface side formed by the cooperation of the auxiliary weft yarns 6 'and 7' is composed of four warp yarns on the paper surface side and every other warp yarn on the paper surface side. The repeating unit is formed by four paper side warps, and the length of the repeating unit is the same as the repeating unit of the paper side fabric (when viewed from the paper side fabric only). It can be seen that it is.
Therefore, since each auxiliary weft is pulled in every repeating unit of the paper surface side fabric with the same force, the paper surface is pulled in the same condition for every minimum unit, and the entire paper surface is formed uniformly and smoothly. it can.
[0033]
Next, looking at the running surface side fabric, it can be seen that the running surface side warp yarns 1 and 2, 3 and 4, 5 and 6, and 7 and 8 are a plain weave plain weave structure. The mesh thickness can be reduced, and it is particularly suitable as a papermaking fabric for tissue production. In an actual woven fabric, the running surface side warps 1 and 2 are arranged in close contact with each other below the paper making surface side warps 1 and 2.
The advantage of having a woven weave structure is the same as using a thick warp having a cross-sectional area equivalent to two, so the net thickness is reduced. There is a point formed in the weft wear type.
[0034]
Example 2
FIG. 2 is a design diagram showing the complete structure of Example 2 of the present invention.
In this embodiment, the arrangement of the upper layer fabric and the lower layer fabric is the same as that of the first embodiment. The relationship between the yarn and the code is the same, only the texture of the auxiliary weft is different.
In Example 1, the auxiliary weft formed a crimp for four upper layer warps on the paper making surface side, whereas the auxiliary weft of this example formed a crimp for two upper layer warp on the paper making surface side. It is.
For example, the auxiliary wefts 6 ′ and 7 ′ are arranged in the most concave portions on the upper side of the paper surface side warps 1, 2, 5 and 6 intersecting each other.
Compared to Example 1 described above, in the case of this example, the portions where the individual auxiliary wefts forming the pair intersect each other are not the same mesh (between the same warps) but are spaced by two warps, and The lower part of the upper warp crimp does not appear on the paper making side, so the part that appears on the paper making side and forms the crimp is slightly crossing each other and easily located in the center between the upper wefts. One auxiliary weft is arranged at a substantially central position between the wefts. Therefore, there is an advantage that uniform fiber support and water space can be obtained.
Whether the pattern of Example 1 or the pattern of Example 2 is adopted can be freely selected according to the characteristics required for the papermaking fabric.
[0035]
【The invention's effect】
As described above, the two-layer fabric for paper making of the present invention is composed of the upper layer and the lower layer using separate warps and wefts, and even if the fabrics of both layers are integrated, the upper layer fabric surface is smooth. In addition, the fiber support of the weft and the auxiliary weft is very good, it is possible to produce smooth paper without wire marks, strong binding force, and the excellent effect of being able to cope with high papermaking speed. It plays.
[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 design diagram showing a complete structure of Example 2 of the present invention.
[Explanation of symbols]
1, 2, 3, 4, 5, 6, 7, 8 Warp
1 ', 4', 5 ', 8', 9 ', 12', 13 ', 16 Weft
2 ', 3', 6 ', 7', 10 ', 11', 14 ', 15' Auxiliary weft

Claims (3)

A papermaking side fabric comprising a papermaking surface side warp and a papermaking surface side weft, a papermaking surface side fabric comprising a traveling surface side warp and a traveling surface side weft, and an auxiliary weft disposed between the papermaking surface side wefts. In a two-layer woven fabric, the weave weave repeatedly repeats the structure passing through the lower side of one papermaking side warp after passing through the upper side of the three papermaking side warps where the papermaking side wefts are continuous The structure, the auxiliary weft is between the papermaking surface side wefts, and the two papermaking surface side warps between the two adjacent papermaking surface side wefts, one papermaking surface side warp is the first papermaking surface side Papermaking from the upper side of the weft to the lower side of the next papermaking side weft, and the other papermaking side warp extending from the lower side of the first papermaking side weft to the upper side of the next papermaking side weft A pair of two wefts are arranged between the surface side wefts, and the individual auxiliary wefts forming the group are alternately placed on the papermaking surface. Passing over the two or more continuous papermaking side warps, the part that does not appear on the papermaking side is lowered to the running surface side and is interwoven with the running surface side warp to make the papermaking side fabric and the running surface side fabric. A two-layer fabric for papermaking, in which auxiliary wefts are arranged on the paper surface side fabric. 2. The papermaking surface side fabric according to claim 1, wherein each auxiliary weft passes above the continuous four papermaking surface side warps and forms a structure in which a set of two passes above all the papermaking surface side warps. 2-layer fabric for papermaking with auxiliary wefts. The two-layer woven fabric for papermaking, wherein the running surface side warp is a warp weave structure in which two parallel warps are arranged in parallel and a plain weave structure, and an auxiliary weft is arranged on the paper surface side fabric according to claim 1 or 2.

Images