JPH02145888A - Double cloth for paper making - Google Patents

Abstract

PURPOSE:To improve abrasion resistance without impairing freeness or wire marking properties by arranging weft yarns in the two upper and lower layers, placing weft yarns without interweaving projecting weft yarns on the running surface and arranging positions of the weft yarns in the lower layer so as not to be adjacent between the adjacent weft yarns. CONSTITUTION:Weft yarns are arranged in the two upper and lower layers and a weft yarn 1' in the lower layer is interwoven in the weave between warp yarns 13 and 15 to form knucles. A weft yarn 2' in the lower layer is interwoven in the weave between the warp yarns 11 and 13 to form knucles. Warp yarns 14 and 12 without interweaving the weft yarns in the lower layer are respectively sandwiched between the warp yarns 13 and 15 and 11 and 13. The warp yarns 13 and 15 and 11 and 13 respectively form pairs to strongly bend the weft yarns in the lower layer. Positions of the respective interwoven weft yarns in the lower layer are shifted and arranged so as not to be adjacent between the adjacent weft yarns. In a complete design figure, marks O indicate positions where the warp yarns interweave the weft yarns on the running surface and marks X indicate positions where the warp yarns interweave the weft yarns on the paper making surface.

Description

[Detailed description of the invention] [Industrial application field] The present invention is directed to IIt products for paper manufacturing.

[Prior Art] There are many more demands on papermaking fabrics than in the past. Broadly speaking, they can be divided into (a) problems related to the paper quality itself, such as preventing the occurrence of wire marks and sufficient entanglement of paper m or paper manufacturing yield, and (b) improving abrasion resistance and extending the service life of textiles. , (c) Good water resistance, etc. Each problem is related to each other in many ways, but roughly speaking, the problem in (b) is mainly the problem of # of the paper-making surface of textiles.
This is a problem that is largely related to the following: (b) is closely related to the structure of the running side surface of the fabric, and (c) is a problem that concerns the fabric as a whole.

These problems must be solved not only in multi-weave fabrics but also in multi-layer fabrics.

Many proposals have been made for the conventional solution (a). However, sufficient efforts have not been made to improve the abrasion resistance of paper-making fabrics, and the running side of paper-making fabrics is of a weft-wearing type, which is limited to preventing wear of the warp threads. There is.

However, in recent years, various conditions have been required such as increasing the speed of paper production, increasing the amount of filler used, and increasing the necessity of producing neutral paper, and the abrasion resistance of papermaking fabrics has become a major problem.

In order to improve such abrasion resistance, attempts have been made to use abrasion-resistant polyamide, but papermaking fabrics using polyamide have the disadvantage of being easy to stretch and having poor posture stability.

Therefore, conventionally, polyester having excellent rigidity has been used for both warp and weft to construct papermaking fabrics that are difficult to stretch and have excellent posture stability.

In order to meet the above requirements, attempts have been made to use yarns with a larger diameter for the running side wefts of conventional papermaking fabrics, and improvements in abrasion resistance have been made. Although this is done to some extent, the thick weft threads disrupt the balance between the weft threads and the warp threads, resulting in poor clipping performance and wire marks.

Furthermore, as can be understood from the problem (c) above, if the structure of the running surface changes, the reactor water quality will also be affected, and the problem cannot be solved by palliative measures such as simply making the weft thicker.

In addition, a big problem with the above-mentioned conventional papermaking fabrics is that all the warp yarns are woven with weft yarns, so when the warp yarns that incorporate the weft yarns on the running surface are worn out and cut, the papermaking fabric itself, which is rotating at high speed, will break and bounce. Not only do they fly and destroy the papermaking machine, but they also damage the slicing lip, which is the nozzle that flows the pulp.

[Problems to be Solved by the Invention] In view of the above-mentioned problems of the conventional technology, the present invention has been developed to solve the problem without adversely affecting the paper-making performance such as the aqueous property and wire mark property of the papermaking fabric. This is intended to improve wear resistance.

[Means for Solving the Problems] The present invention provides the following features: ri, * Yarns are arranged in two layers, upper and lower, and warp threads are arranged in which no weft threads protruding onto the running surface of the lower layer are woven into the warp threads,
A pair of warp yarns adjacent to each other with this warp in between interweaves the lower layer weft protruding onto the running surface once into the fabric, forming a long clip of weft yarns, and at the same time, the weaving position of each lower layer weft yarn is woven between the adjacent weft yarns that break and break. A woven fabric for papermaking that has a complete structure that is made by arranging them so that they do not fit together.

2. Adjacent 1 to understand the weft protruding on the running surface into the tissue
A warp sandwiched between a pair of warps that does not weave a weft protruding onto the running surface weaves the weft of the paper-making surface into the structure at a position where the weft protruding from the running surface of the pair of warps is woven into the heavy weave. The double-woven fabric for papermaking as described in item 1.

3. Every other warp thread does not incorporate weft threads that protrude into the running surface of the lower layer! The two Irm products for paper manufacturing described in any one of Items 1 to 2 above.

4. The double lining for paper manufacturing according to any one of Items 1 to 2, wherein the warp yarns are arranged every other warp yarn without weft yarns protruding onto the running surface of the lower layer.

5. The double-woven fabric for papermaking according to any one of items 1 to 4, wherein the weft yarns on the running surface of the lower layer are polyester yarns and polyamide yarns.

6. The double-woven fabric for papermaking according to item 5, wherein the polyamide weft on the running surface of the lower layer has a diameter larger than that of the polyester weft.

Since the present invention forms the above-mentioned structure on the running surface of the papermaking fabric, the influence on the papermaking surface is extremely small, has almost no effect on the papermaking properties of the papermaking surface, and improves furnace water resistance and wire mark resistance. No change is seen.

In the present invention, the weft threads protruding toward the running side are woven into the weave once in the complete weave, so the clip is long;
With good clipping properties, thick weft yarns can be placed, and wear resistance can be further improved.

[Function] One of the features of the present invention is that the warp yarns are arranged so that the weft yarns of the running surface are not woven into the fabric. Since this warp thread is not exposed to the running surface, it is not subjected to wear during use, and therefore does not get cut in the middle. Therefore, due to this warp thread, the papermaking double-woven fabric of the present invention exhibits excellent postural stability. This has the effect of preventing the fabric from being cut.

The second feature of the present invention is that a pair of warps adjacent to each other across a warp that is not weaving the weft on the running surface bends the weft on the running surface with a strong force and weaves it into #J1m at the lrM location.

In other words, it is certainly possible to bend a weft thread with a force stronger than that of a single warp thread by bending the weft thread in one place using multiple adjacent warp threads, but in this way, it is possible to bend the weft thread with a force stronger than that of a single warp thread. When bending, the repulsive force of the weft pushes the warp threads closer together, eliminating the flat water space between them, which reduces the water resistance in this area, resulting in uneven water property and causing wire marks. The present invention has solved this problem by using a special structure in which the weft threads are woven by a pair of warp threads sandwiching a warp thread without a single weft thread woven between them. That is, at this weaving position of the lower layer weft, the interposed warp does not weave the lower layer weft, but is pulled out from between the two warps that sandwich this warp and weaves the upper layer weft. The two warp yarns come close to each other and form a pair, and the lower weft yarn is strongly bent and woven into the weave, resulting in very good clipping properties.

In addition, at the weaving position of the lower layer weft, the two warp threads that form a pair are close to each other, so the r-water pattern decreases in plan, but due to the existence of the warp sandwiched between them, the three-dimensional P water pattern is here. Since gaps are formed, uneven distribution of r-water types can be prevented.

In this way, since the lower layer weft is bent with strong force by a pair of warp yarns and woven at one place, the clipping properties are even better, thicker weft yarns can be used, and abrasion resistance is dramatically improved.

The third feature of the present invention is that the weaving positions of the wefts on the running surface are staggered so that adjacent wefts are not adjacent to each other. By arranging the knuckles where the weft and warp intersect so that they are not adjacent to each other, the knuckles are not unevenly arranged, which prevents the uneven distribution of the r-water patterns, and also has the effect of smoothing the running surface of the fabric.

By forming a special running surface in this way, the present invention increases the drag-resistant volume of the running surface without changing the surface properties of conventional papermaking fabrics, that is, the support properties of pulp fibers and the wire mark characteristics. This greatly improves the abrasion resistance of textiles.

The abrasion resistance of the running surface of papermaking fabric will be explained. The abrasion resistance of the running surface of a papermaking fabric is increased by increasing the abrasion volume of the weft threads forming the running surface. in fact,
As will be explained later based on the drawings, the warp and weft intersect,
In the knuckle portion where the yarn is sharply bent, there is a weft portion that does not have an anti-wear effect due to the shape of the cling. In other words, the smaller the number of knuckles within the same area, the better the wear resistance and the better the water resistance.

Next, clipping property will be briefly explained. Clipability is an index of the warp being able to push and bend the weft by overcoming the repulsive force of the weft when the warp tries to bend the weft.
This is because the length of the clip, that is, the distance between the warp threads that push up the weft threads, is long (the better it is).The better the clipping performance is, the more thick weft threads can be used.

In the present invention, the clipping of the weft yarns on the running surface of the fabric is longer, so the clipping properties are good, and thicker weft yarns, which could not be used conventionally, can be arranged, so that the wear volume can be further increased.

Since the present invention forms the above-mentioned structure on the running surface of the paper-making fabric, the influence on the gi surface is extremely small, has almost no effect on the papermaking properties of the paper-making surface, and improves water resistance and wire mark resistance. No change is seen.

Incidentally, the increase in wear volume and the increase in wear resistance will be specifically explained in the following example section while comparing with a conventional example.

[Example] Figures 1 to 6 show examples of the present invention, in which the warp and weft are 16 (16 shafts), 14 (14 shafts), 18 (18 shafts), and 20 ( 10 is a complete design drawing showing a double weave papermaking fabric having 20 shafts), 22 threads (22 shafts) and 24 threads (24 shafts); 1 is a complete design drawing showing a double weave papermaking fabric. .

In the 101M conventional papermaking fabric, the clip lengths of adjacent weft yarns on the running surface are the same.

The numbers in these figures indicate the warp and weft numbers, with numbers without dashes being warps and numbers with dashes being wefts. Note that the upper and lower weft yarns are indicated by the same number, but will be explained each time if necessary.

In Figures 1 to 6 and 10, the mark Q indicates the position where the warp interweaves the weft on the running surface, and the mark X indicates the position where the warp interweaves the weft on the paper-making surface. In each figure, where O marks, Indicates that it is packed.

Furthermore, the warps indicated by the even numbers in FIGS. 1 to 6 do not have an O mark, which indicates that the even numbered warps do not weave the wefts of the lower layer.

Here, the distance between the Q mark and the Q marks continuing from side to side indicates the length of the clip of the weft yarn forming the running surface of the papermaking fabric.

Moreover, the distance between the X mark and the X marks continuing from side to side indicates the length of the clip of the weft yarn forming the papermaking surface of the papermaking fabric.

The following will explain based on raw coal drawings.

In the embodiment shown in FIG. 1, there are 16 warps and 16 wefts (16 each).
6 shafts) for paper making! It is a woven fabric, and the lower weft 1' in Fig. 1 is incorporated into the Ml weave at warp 13.15,
The knuckle forms a clip in which there are 13 warp threads between the knuckle and the next knuckle of the complete design (not shown) which repeats on the right or left side, and the lower weft thread 2' is warp thread 11.13. The clip is woven into the fabric to form a knuckle, and there are 13 warp threads similar to the lower weft 1' above between the next knuckle of the complete design (not shown) that repeats on the right or left side. form.

Then, the warp 13°15 weaves the lower weft 1' into the M weave.
The warp 14, in which the lower weft is not woven, is sandwiched between them, but the lower weft 1' of the warp 13.15 is woven in! In this case, the warp 14 incorporates the weft of the paper-making surface, and the warp 1
3 and 15 to the upper paper-making surface, and warp 1
3. and 15 can be approached, and the warp 13. and 15 is 1
Since the lower layer wefts are strongly bent in pairs and woven into the fabric, the effect of extremely good clipping properties is achieved. and,
As mentioned above, the warp threads 14 between the warp threads 13.15 are the same as the warp threads 14 at the position where the warp threads 13.15 weave the lower weft threads 1'.
The punch is drawn out from between 3.15 to the upper paper making surface, and the warp threads 13. Although 15 approaches and the plane P water space decreases,
In this region, a three-dimensional P water pattern is formed due to the presence of the warp threads 14, and debris is prevented from forming between the P water patterns.

Also, the warp 12 which does not weave the lower weft is sandwiched between the warps 11 and 13 which weave the lower weft 2' into the structure, but it is enough to weave the lower weft 2' of the warp 11 and 13! In this case, the warp 12 is woven with the weft of the paper-making surface, and the warp 11
．． 13 to the upper paper-making surface, and warp threads 11
．． and 13 can be approached, and the warp threads 11. and 13 work together as a pair to strongly bend the lower weft yarns and weave them into the fabric, resulting in extremely good clipping properties. As mentioned above, the warp 12 between the warp If and 13 is the warp 1
1.13 is about weaving the lower weft 2'! Now, warp 11
．． The punch is drawn out from between 13 to the upper paper making surface, and the warp 1
1. and 13 are brought closer together and the plane P water pattern is reduced, but a vertical IF water space is formed in this region due to the presence of the warp threads 12, and the omnipresence of the P water patterns is prevented.

The knuckle formed by the warp 11.13 that weaves the lower weft 2' into #l1m and the knuckle formed by the warp 13.15 that weaves the lower weft 1' into the fabric are shifted by two warps, It is understood that they are not adjacent. Also, between the lower layer weft 2' and the lower layer weft 3', the warp 8
Their duties are different and they are not next to each other.

In the embodiment shown in FIG. 2, there are 14 warps and 14 wefts (14 each).
4 shafts), the lower weft 1' in Figure 2 is woven into a #fl weave with warps 7 and 9, forming a knuckle and repeating the complete design on the right or left side (not shown). The lower layer weft 2' forms a clip with 11 warp threads between it and the next knuckle of the weave, and the lower weft thread 2' is tangled into the weave by the warp threads 5 and 7, forming a knuckle, and the lower weft thread 2' is tangled into the weave, forming a knuckle, and the lower weft thread 2' forms a clip with 11 warp threads. A clip having 11 warp threads similar to the weft thread 1' is formed between the knuckle of the next repeating complete design (not shown).

And, between the warp threads 7°9 which weave the lower weft 1' into the fabric, there is a warp 8 which does not weave the lower weft into the fabric.
At the position where the lower weft 1' of the warps 7 and 9 is woven, the warp 8
The weft threads of the paper-making surface are woven into the paper-making surface, and the weft threads of the paper-making surface are drawn out from between the warp threads 7 and 9 to the upper paper-making surface, and the warp threads 7. and 9 become close to each other, and the warp threads 7° and 9 form a pair to strongly bend the lower weft threads and weave them into the fabric, resulting in extremely good clipping properties. As mentioned above, the warp thread 8 between the warp threads 7 and 9 is exposed to the upper paper-making surface from between the warp threads 7 and 9 at the position where the warp threads 7 and 9 weave the lower layer weft thread 1', and the warp thread 7. and 9 approach each other, and the number of plane R water types decreases, but a three-dimensional P water type is formed in this region due to the presence of the warp threads 8, and uneven distribution of the P water types is prevented.

Similarly, the warp 5, which weaves the lower weft 2' into the structure,
The warp 6, which does not weave the lower weft, is sandwiched between the warps 5 and 7, but at the position where the lower weft 2' of the warps 5 and 7 is woven,
The warp threads 6 are woven with the weft threads of the paper-making surface, and are drawn out from between the warp threads 5 and 7 to the paper-making surface above, and the warp threads 5. and 7 can be approached, and the warp threads 5. and 7 can be approached. and 7 form a pair to strongly bend the lower weft yarns and weave them into the fabric, resulting in extremely good clipping properties. And, as mentioned above, warp 5
The warp threads 6 between the warp threads 5, 7 are drawn out from between the warp threads 5, 7 to the upper paper-making surface at the position where the warp threads 5, 7 weave the lower layer weft 2'. and 7 are brought closer to each other and the planar water space is reduced, but a three-dimensional water space is formed in this region due to the presence of the warp threads 6, and uneven distribution between the P water types is prevented.

The knuckle formed by the warps 5 and 7 that weave the lower layer weft 2' into the M weave and the knuckle formed by the warps 7 and 9 that weave the lower layer weft 1' into the MJll are shifted by two warps, and are adjacent to each other. It is understood that this is not the case. Also,
The lower layer weft 2' and the lower layer weft 3' are shifted by two warps and are not adjacent to each other.

The embodiment shown in FIG. 3 has 18 warp threads and 18 weft threads (
18 shafts), the lower weft 1' in Fig. 3 is threaded into the ga by the warp threads 9 and 11, forming a knuckle, and repeating on the right or left side in a complete design (not shown). 2' and the next knuckle of the warp 2' form a clip with 15 warps, and the lower weft 2'
3, the clip is woven into AHII to form a knuckle, and between the next knuckle of the complete design (not shown) which repeats on the right or left side, there are 15 warp threads similar to the above-mentioned weft thread 1'. form.

The warp 10, which does not include the lower weft, is sandwiched between the warp 9 and 11 that weave the lower weft 1' into the fabric, but at the point where the lower weft 1' is woven into the warp 9 and 11,
The warp 10 is woven with the weft of the papermaking surface, and the warp 9,1
1 to the upper paper-making surface and warp threads 9. and 11
It becomes possible to approach the warp threads 9. and 11 work together as a pair to strongly bend the lower weft yarns and weave them into the fabric, resulting in extremely good clipping properties. As mentioned above, the warp 10 between the warps 9 and 11 is drawn out from between the warps 9 and 11 to the paper-making surface above at the position where the warps 9 and 11 weave the lower weft 1'. 9. and 11 approach each other, and the plane r water-shaped station decreases, but warp 1
Due to the presence of 0, a steric r-water type is formed, and uneven distribution among the r-water types is prevented.

Similarly, the warp 11 weaves the lower weft 2 into the fabric.
．． The warp 12, which does not weave the lower weft, is sandwiched between the warps 11 and 13, but at the position where the lower weft 2' of the warp 11.13 is woven, the warp 12 weaves the weft of the paper-making surface.
From between warp threads 11. and 13 can be approached, and the warp threads 11. and 13
Since the lower layer wefts are strongly bent and woven into the structure as a pair, the clipping properties are extremely good.

And, as mentioned above, the warp 12 between the warps 11 and 13
In the position where the warp threads 11.13 interweave the lower layer weft threads 2', the warp threads 11. and 13 are brought closer to each other and the plane r-water space is reduced, but a three-dimensional r-water pattern is formed in this region due to the presence of the warp threads 12, and waste is prevented from forming between the r-water patterns.

The knuckles formed by the warps 11, 13 that weave the lower weft 2' into the weave and the knuckles formed by the warps 9, 11 that weave the lower weft 1' into the weave are shifted by two warps and are adjacent to each other. It is understood that there is no 6, t
Note that the lower layer weft 2' and the lower layer weft 3' are shifted by two warps, and are not adjacent to each other.6 In the embodiment shown in FIG.
It is a 2Ua product for paper making with 20 shafts), and is shown in Figure 4 below.
The 1m thread 1' is woven into the fabric at warp 13.15, forming a knuckle and repeating on the right or left side in a complete design (
(not shown) form a clip in which 17 warp threads exist, and the lower weft thread 2' is the warp thread 7.
, 9 are woven into the structure to form a knuckle, and there are 17 warp threads similar to the above-mentioned lower weft thread 1' between the next knuckle of the complete design drawing (not shown) that repeats on the right or left side. form a clip.

Then, the warp 13°15 weaves the lower weft 1' into the fabric.
The warp 14, which does not weave the lower weft, is sandwiched between them, but at the position of the warp 13.15 where the lower weft 1' is woven, the warp 14 weaves the weft of the paper-making surface, and the warp 1
3. Pull out the drawing from the 15-memory space to the upper paper-making surface, and insert the warp thread 1.
3. and 15 can be approached, and the warp 13. and 15 is 1
Since the lower layer wefts are strongly bent in pairs and woven into the fabric, the effect of extremely good clipping properties is achieved. and,
As mentioned above, the warp threads 14 between the warp threads 13.15 are the same as the warp threads 14 at the position where the warp threads 13.15 weave the lower weft threads 1'.
The punch is drawn out from between 3.15 to the upper paper making surface, and the warp threads 13. Although 15 approaches and the plane r water space decreases,
In this region, a vertical IP water space is formed due to the presence of the warp threads 14, and uneven distribution of the P water types is prevented.

Similarly, lower layer weft 2' is h! The warp 8, which does not weave the lower weft, is sandwiched between the warps 7 and 9 that are woven into the Al11l, but at the position where the lower weft 2' of the warps 7 and 9 is woven, the warp 8 weaves the weft of the paper-making surface. , from between the warp threads 7 and 9 to the upper paper-making surface, and the warp thread 7.
It becomes possible to approach warp threads 7 and 9. and 9 form a pair to strongly bend the lower weft yarns and weave them into M1#, resulting in extremely good clipping properties. As mentioned above, the warp thread 8 between the warp threads 7 and 9 is drawn out from between the warp threads 7 and 9 to the upper paper-making surface at the position where the warp threads 7 and 9 weave the lower layer weft thread 2', 7. and 9 are close to each other and the plane r
Although the water space is reduced, a three-dimensional r-water type gap is formed in this region due to the presence of the warp threads 8, and waste is prevented from forming between the P-water type.

A knuckle formed by the warps 7 and 9 that weave the lower weft 2' into the fabric, and a warp 1 that weaves the lower weft 1' into the fabric.
It is understood that the knuckles formed by 3.15 are shifted by six warp threads and are not adjacent to each other. Also,
The lower layer weft 2' and the lower layer weft 3' are shifted by 10 warps and are not adjacent to each other.

In the embodiment shown in FIG. 5, there are 22 warp threads and 22 weft threads each (
22 shafts), the lower weft 1' in Fig. 5 is folded into the warp 11.13 to form a knuckle, and is repeated next to the right or left in a complete design (Fig. ) and the next knuckle (not shown) form a clip with 19 warp threads, and the lower weft thread 2'
1 is woven into the fabric to form a knuckle, and between the next knuckle of the complete design (not shown) that repeats on the right or left side, there are 19 warp threads similar to the lower weft thread 1' mentioned above. Form a clip.

Then, the warp 11°13 weaves the lower weft 1' into the structure.
The warp 12, which does not involve the lower weft, is interposed between them, but at the position where the lower weft 1' of the warp 11.13 is woven, the warp 12 weaves the weft of the paper-making surface, and the warp 1
From between 1.13 and the upper paper making surface, draw out the warp 11.
．． and 13 can be approached, and the warp threads 11. and 13 work together as a pair to strongly bend the lower weft yarns and penetrate into the tissue, resulting in extremely good clipping properties. As mentioned above, the warp 12 between the warps 11 and 13 is the warp 1
At the position where 1.13 weaves the lower weft 1', the warp 11
．． The punch is drawn out from between 13 to the upper paper making surface, and the warp 1
1. and 13 are brought closer to each other and the planar water space is reduced, but a three-dimensional r-water type is formed in this region due to the presence of the warp threads 12, and uneven distribution between the P-water types is prevented.

Similarly, the warp 9, which weaves the lower weft 2' into the structure,
The warp 10, which does not weave the lower weft, is sandwiched between the warp 10, but at the position where the lower weft 2' of the warp 9, 11 is woven, the warp 10 weaves the weft of the paper-making surface, and the warp 9, 11 Pull out the punch on the upper paper-making surface from between the warp threads 9.
and 11 can be approached, and the warp threads 9. and 11 work together as a pair to strongly bend the lower weft yarns and weave them into the jam, resulting in extremely good clipping properties. As mentioned above, the warp 10 of the warp 9, 11 is the warp 10 of the warp 9, 1.
At the position where the lower layer weft 1' is woven, the warp 9. and 11
Although the plane r-water space approaches and the plane r-water space decreases, a three-dimensional P-water type is formed in this region due to the presence of the warp threads 10, and uneven distribution of the r-water types is prevented.

The knuckle formed by the warp 9.11 that weaves the lower weft 2' into the weave and the knuckle formed by the warp 11.13 that weaves the lower weft 1' into the weave are shifted by two warps and are adjacent to each other. It is understood that there is no. Further, the lower layer weft 2' and the lower layer weft 3' are shifted by two warps, and are not adjacent to each other.

In the embodiment shown in FIG. 6, there are 24 warp threads and 24 weft threads each (
24 shafts), the lower weft 1' in Figure 6 is woven into the #fi weave with warp 7.9, forming a knuckle and repeating on the right or left side with a complete design (not shown). 2) and the next knuckle of the thread form a clip with 21 warp threads, and the lower weft thread 2' has warp threads of 5.7
The clip is woven into the fabric to form a knuckle, and there are 19 warp threads between it and the next knuckle of the complete design (not shown) that repeats on the right or left side, similar to the lower weft thread 1'. form.

The warp 8, which does not weave the lower weft, is sandwiched between the warp 7°9 where the lower weft 1' is woven into the fabric, but the warp 8 is sandwiched between the warps 7 and 9 where the lower weft 1' is woven. The weft threads of the paper-making surface are woven into the paper-making surface, and the weft threads of the paper-making surface are drawn out from between the warp threads 7 and 9 to the upper paper-making surface. and 9 become close to each other, and the warp threads 7° and 9 form a pair to strongly bend the lower weft threads and penetrate into the tissue, resulting in extremely good clipping properties. And, as mentioned above, warp threads 7 and 9
The warp threads 8 between the warp threads 7 and 9 are drawn out from between the warp threads 7 and 9 to the paper-making surface above at the position where the warp threads 7 and 9 interweave the lower layer weft thread 1'. and 9 are brought closer together and the plane P-water space is reduced, but a three-dimensional P-water type is formed in this region due to the presence of the warp yarns 8, and uneven distribution of the P-water types is prevented.

Similarly, the warp 5. which weaves the lower weft 2' into the structure.
The warp 6, which does not weave the lower weft, is sandwiched between the warps 5 and 7, but at the position where the lower weft 2' of the warps 5 and 7 is woven,
The warp threads 6 are drawn out from between the warp threads 5 and 7 to the paper-making surface above, and the warp threads 5. and 7 can be approached, and the warp threads 5. and 7 can be approached. and 7 work together as a pair to strongly bend the lower weft yarns and penetrate into the tissue, resulting in extremely good clipping properties. And, as mentioned above, warp 5
The warp threads 6 between the warp threads 5. and 7 approach each other and the plane r water space decreases, but at this location, the three-dimensional r
A water gap is formed and the reactor water space is prevented from opening.

The knuckle formed by the warps 5 and 7 that weave the lower weft 2' into Mm and the knuckle formed by the warps 7 and 9 that weave the lower weft 1' into the #lI weave are shifted by two warps. , it is understood that they are not adjacent. Mana,
The lower layer weft 2' and the lower layer weft 3' are shifted by 12 warp threads and are not adjacent to each other.

From these examples, it is understood that in the papermaking double-woven fabric of the present invention, the weaving positions of the lower layer wefts are not unevenly distributed.

FIG. 10 shows the conventional example of paper manufacturing 2F! The lower weft 1' of the fabric forms a clip with warp 7 and warp 15, and the lower weft 2' forms a clip with warp 2 and warp 10.
There are seven warp threads between each clip,
2F for paper making of the present invention shown in Fig. 1 of the same 116 shaft! It can be seen that the fabric forms a long clip with 13 warp threads, but it forms a much shorter clip.

Figures 7 and 8 show the knuckle portion of the papermaking fabric. Reference numerals 25 to 27 are warp threads, and 28' is a lower weft thread protruding from the running surface.

Figure 7 shows the warp 25, 26, 27 passing under the lower weft 28' and weaving the lower weft 28' to form a knuckle.
The warp threads 26 pass over the lower weft 28' and weave in the lower weft 28' to form a knuckle, but the warp threads 26 pass over the lower weft 28' and do not weave the lower weft 28' into the knuckle.

It is clear that the shaded areas in FIGS. 7 and 8 do not exhibit wear resistance. That is, as the number of knuckles increases, the lower layer weft portion that does not have a wear-resistant function increases, and the effective wear volume decreases.

FIG. 9 shows the shape of the clip. The warps 30 and 31 pass under the lower weft 29' and weave the lower weft 29', and as is clear from this figure, the warp 30.3
1 pushes the lower layer weft 29' upward. Further, the warp yarns 33 and 34 are subjected to the repulsive force of the lower layer weft 29', but push the lower layer weft 29' down. Also, the warp threads 32 push the lower layer weft threads 29'downward;
The index of the warp, which is small compared to 34 degrees, pushes and bends the weft by overcoming the repulsive force of the weft, is called clipping property, and if the clipping property is good, a thicker lower layer weft can be used.

The longer the distance between the warp threads 30 and the warp threads 31, the longer the warp threads 32
．． 33, 34. The greater the number of..., the better the clipping performance becomes.

In the present invention, the lower weft that protrudes from the running surface of the fabric is woven into the fabric once, so the length of the clip is long and the clipping properties are good.Thus, thick threads are placed in the lower weft to increase wear-resistant volume. Therefore, the wear resistance can be further improved.

Furthermore, in the present invention, polyester yarn and polyamide yarn are suitable as the lower layer weft of the running surface, but these yarns may be used alone or may be interwoven, and their arrangement may be alternately arranged. You can also break it down and arrange it.

As described above, in the present invention, the effective abrasion-resistant volume on the running side of the papermaking fabric can be significantly increased compared to conventional fabrics, and the abrasion resistance can be dramatically improved.
This will be concretely demonstrated in the next comparative test.

Taking the papermaking fabric of the present invention shown in FIG. 1 as a representative example,
A comparison of the abrasion resistance of the conventional papermaking fabrics shown in the figure is shown.

First, in calculating the volume of the clip of the lower weft to compare the abrasion volume, the clip was made cylindrical between the warps.

In reality, as will be explained later, there are parts unrelated to abrasion that exist above the bends of the lower weft and the warp, so in the conventional example, the wear-resistant volume becomes smaller 6 In the embodiment shown in Fig. 1, the long clip Since short clips are formed every other time, the volume of the clip was calculated for two adjacent lower wefts, but for the comparative example #J, it was calculated for two adjacent lower wefts and the two were compared.

Regarding the papermaking fabric formed by the same 16 warps and wefts shown in FIGS. 1 and 10, the two adjacent lower wefts are the same as the warp and warp forming the clip in the conventional example shown in FIG. There are 7 warp threads in between, so 7X4=
A length of 28 clips is formed. Therefore, if the warp diameter is 0.17o+m and the weft diameter is 0.22m5+, its volume is 28x0.17x (0,22/2) 2π=O,t1
31+m+3.

Similarly, in the embodiment of the present invention shown in FIG. 1, clips each having a length of 13 warp threads are formed for two adjacent lower weft threads. Since the two threads are woven into the lower layer weft in pairs, a thicker lower layer weft can be used, so the warp diameter is 0.17 mm,
If the diameter of the polyester weft is 0.301111 and the diameter of the polyamide weft is 0.30nm, the volume of the clip is 13x0.17x (0,30/2) 2π+13xG
, 17x (0,30/2) 2π = 0.312 x 3. Therefore, the increase rate of wear volume is (0,312÷0
．． 181-1) x 100 = 72.4 (%), that is,
According to a simple calculation, in the embodiment of the present invention, approximately 72
% chili volume is large.

(Margin below) The results of the comparative test are shown in Table 1 below.

Table 1 Inventive product Conventional product Warp Thread diameter (city) Upper weft diameter (city) Upper weft diameter (c round) (1,1 cross m) Time until upper weft abrasion and breakage (hours) 0.170.17 (Polyester ] (Polyester) 0.170.17 (Polyester) (Polyester) 0.30 0.22 (Polyester) (Polyester) Q, 30 0.22 C Polyamide) (Polyamide) (Hereafter the margin) Test method: Abrasion manufactured by Nippon Filcon Exam r! % (Utility Model Registration No. 1350124), and Grand Award Calcium Carbonate was used as the filler.

Test results: As shown in Table 1, the time required for the underline thread to wear out (wire life) was approximately 1.9 times longer for the product of the present invention than for the conventional product.

[EFFECT JAJ As explained above, the paper manufacturing a product of the present invention has the above-mentioned special structure to form a long clip on the lower weft protruding to the running surface, dramatically increasing the wear-resistant volume, and further,
This prevents the reduction of the reactor water space due to the shifting of the warp yarns into which the lower layer wefts are woven, and in addition, the positions where the lower layer weft yarns are woven into the structure are distributed so as not to be adjacent to each other to prevent uneven distribution between r water types. , has excellent wear resistance and posture stability, and has the effect of not generating wire marks.

[Brief explanation of the drawing]

1, 2, 3, 4, 5, and 6 show examples of the present invention, in which the number of warp threads and weft threads are 16 (16 shafts) and 14, respectively. (14 shafts), 1
8 pieces (18 shafts), 20 pieces (20 shafts), 22 pieces
Figures 7 and 8, which are complete design drawings of a fully textured papermaking double fabric consisting of books (22 shafts) and 24 pieces (24 shafts), show the knuckle part of the papermaking fabric, and Figure 9 shows the knuckle part of the papermaking fabric. indicates the shape of the clip. FIG. 10 is a complete design drawing of a conventional paper-making double-woven fabric of a complete Mi weave, which is composed of 16 warps and 16 wefts (16 shafts). 1-27, 30.31... Warp 1'-24', 28', 29'-... Weft Fig. 2 Fig. 1 Fig. 3 10 11 12 13 14 Is 16 17
18 Figure 7 Figure 8 Figure 9-Z' Figure 10

Claims (1)

[Scope of Claims] 1. Weft yarns are arranged in two layers, upper and lower, and warp yarns that do not incorporate weft yarns that protrude into the running surface of the lower layer are arranged, and a pair of adjacent warp yarns sandwiching these warp yarns are used to create a running pattern. It has a complete structure in which the lower layer wefts protruding from the surface are woven once into the structure to form a long weft clip, and the weaving positions of each lower layer weft are staggered so that adjacent wefts are not adjacent to each other. , double woven fabric for paper making. 2. Adjacent 1 weaving the weft threads protruding into the running surface into the fabric
A patent in which the warp, which is sandwiched between a pair of warp threads and does not weave the weft threads protruding onto the running surface, weaves the weft threads of the paper-making surface into the weave at a position where the weft threads protruding from the running surface of the pair of warp threads are woven into the weave. A double-woven fabric for papermaking as set forth in claim 1. 3. A double-woven fabric for papermaking according to any one of claims 1 to 2, in which every other warp is arranged so that no weft that protrudes onto the running surface of the lower layer is woven into the warp. . 4. A double-woven fabric for papermaking according to any one of claims 1 to 2, in which a plurality of warps are arranged every other warp without interweaving wefts that protrude to the running surface of the lower layer. . 5. The double woven fabric for papermaking as set forth in any one of claims 1 to 4, wherein the weft yarns on the running surface of the lower layer are polyester yarns and polyamide yarns. 6. The double-woven fabric for papermaking according to claim 5, wherein the polyamide weft on the running surface of the lower layer has a larger diameter than the polyester weft.