JPS6024238B2 - Paper making cloth - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cloth for papermaking, and the present invention relates to cloth for papermaking, in which a weft yarn continuously passes over or under two ridge yarns for the purpose of increasing abrasion resistance and improving water squeezing. , where the silk threads alternately pass above and below the adjacent warp threads, and in the case of full threads that are driven back and forth, the weft threads pass above or below the two adjacent warp threads. 2/2 consisting of 8 warp threads and 4 striped threads with a structure positioned so that the parts do not touch
A fiber batt is bonded to the surface of a base fabric made of a collapsible weave.

``2/2 diagonal weave'' has been used in cloth for paper making, but depending on the thickness and number of yarns, diagonal marks appear clearly, so as an improved version, 2/2 oblique weave as shown in Figure 1 is used. This is the result of the use of pattern weaving.

2/2 knuckles of the warp and silk threads are 2 in the 2/2 oblique spelling
/2 Paper cloth is less likely to cause marks on wet paper because it is not lined up as clearly as diagonal weave.

Furthermore, since there are fewer texture points than plain weave, the number of warps and striped yarns can be increased. Therefore, the 2/2 slant weave is also often used as a base fabric for needle felt, especially needle felt cloth for paper making. This 2
/2 When looking at the cross section along the striped threads of the 2-striped thread, the first striped thread 21' passes over the two warp threads, then under the two warp threads, and is woven by repeating this process. , that is, the weft threads pass in the same way as the weft threads of the 2/2 diagonal pattern, the second weft thread 22' passes alternately above and below the warp threads, that is, it is woven in the form of plain weave, and the third stripe thread 23' The relationship between the top and bottom of the first striped thread is reversed, but every second striped thread passes above and below, that is, in the same way as the 2/2 diagonal weft, and the fourth weft 24' is the same as the third weft thread. Although the relationship between the striped threads and the top and bottom is reversed, they still pass alternately above and below the warp, creating a plain weave pattern.

The overall number of tissue points in the 2/2 oblique spelling is the same as the 2/2 oblique spelling, but the second and fourth striped threads are 22
', 24' is the first because it is in the form of plain weave.
Compared to the third wefts 21' and 23', the number of points where the warp and weft intersect is twice as large, so the wefts have more bends, and the shrinkage force in the width direction of the woven fabric is It is larger than the second and third twill threads.

Conversely, the first and third threads tend to sag, causing a bulge on the outer surface of the cloth at the portion 29 where there is no intersection.Also, as shown in Figure 1-B, the warp threads 21,
22, 23, 24, ..., the twill yarns 21', 23', in which the weft yarns fly continuously above or below the two warp yarns, do not pass at right angles but run slightly obliquely, resulting in a plain weave pattern. Twill thread 22' is bonito thread 2
1, 22, 23, 24, . . . When a needle felted cloth with a batt bonded to it is made using such a fabric as a base fabric, on the back side of the cloth, the striped yarn that comes out under the two warp threads will sag where it comes out on the back side of the base fabric. Particularly when used as paper cloth on a paper making machine, after the batt fibers sticking out on the back side are worn out, they are directly affected by the various rolls, suction box plates, showers, etc. on the paper making machine and are worn out. Ru. Only this part becomes damaged first and the thread becomes thinner, and eventually the thread breaks from this point and the cloth becomes unusable. In addition, the non-uniform texture of the base fabric due to the oblique running of the striped yarns 21' and 23' in FIG. 1B causes microscopic unevenness in the pressure distribution on the wet paper, which adversely affects the water squeezing of the wet paper. The paper-making felt cloth of the present invention has improved the drawbacks of the conventional products as described above, and examples of its base cloth are shown in FIGS. 2 and 3.

The binding method of the base fabric shown in Fig. 2 is a 2/2 sardine oblique binding with 8 warp threads and 4 striped threads.The first warp thread 31 is below the first weft thread 31', and the second on the striped thread 32', 3
Above the th weft 33' and below the 4th overall thread 34',
The th warp thread 32 passes above the first striped thread 31', below the second silk thread 32', below the third striped thread 33', above the fourth overall thread 34', and passes over the third warp thread 33'. is the first weft 31'
Above, above the second weft 32', below the third striped thread 33', and below the fourth weft 34', the fourth warp 34 is
Below the first striped thread 31', below the second striped thread 32', 3
5th weft thread 33', 4th overall thread 34'
The th warp 35 is above the 1st weft 31', below the 2nd striped thread 32', below the 3rd silk thread 33', and above the 4th overall thread 34'. 1st weft 31'
, above the second weft 32', above the third striped thread 33', below the fourth weft 34', and the seventh warp 37 is 1
The 8th warp 38 runs above the 1st weft 31', above the 2nd weft 32', below the 3rd weft 33', and below the 4th weft 34'. Bottom, below the second twill thread 32', above the third weft thread 33', fourth twill thread 3
Spelled over 4'.

The striped threads of this spelling have the same number of parts 39 where the threads pass above or below the two adjacent warp threads in a continuous floating manner and parts 39' where the threads pass in the form of a plain weave. appear one by one. The way the base fabric is spelled in Figure 3 is a 2/2 slanted pattern spelling consisting of 8 warp threads and 4 weft threads, with the first ridge thread 41
is below the first striped thread 41', above the second striped thread 42',
Above the third weft 43' and below the fourth striped thread 44',
The second warp 42 passes above the first weft 41', above the second striped thread 42', below the third striped thread 43', below the fourth striped thread 44', and the third warp 43 is the first silk thread 41
', below the second striped thread 42', below the third weft thread 43'
The fourth warp thread 44 runs below the first weft thread 41', above the second weft thread 42', and above the fourth striped thread 44'.
5th weft 43' and below 4th weft 44'.
The th warp 45 runs above the 1st weft 41', below the 2nd striped thread 42', below the 3rd weft 43', and above the 4th striped thread 44'. 1st striped thread 41'
, below the second weft 42', above the third striped thread 43', above the fourth striped thread 44', and the seventh warp 47
The 8th warp 48 runs above the 1st striped thread 41', above the 2nd full thread 42', below the 3rd striped thread 43', and below the 4th weft 44'. 41', below the second full thread 42', below the third striped thread 43', and the fourth silk thread 4
It is woven over 4'.

This is also similar to the weaving method shown in Fig. 2, where the striped threads pass continuously above or below two adjacent warp threads (49) and the plain weave (49') where the threads pass through. The same number also appears in the threads. The base fabric in Figure 2 has a shape in which the weft floats.
A flat shape appears after the weft, but in the base fabric shown in Figure 3, the weft floating shape and the flat shape appear alternately, so the latter has a more uniform and stable texture. A fiber batt is bonded to the base fabric of the above-described weave by a conventional method by needling to obtain a paper base fabric. Although it is preferable to use mainly synthetic fiber threads as the base fabric threads used in the paper cloth of the present application, it is also possible to use natural fiber threads or highly twisted threads made from a mixture of natural fibers and synthetic fibers. It is possible.

Most preferably, polyamide or polyester multifilament strands are used.

Paper making machines have become extremely fast in recent years, and the pressure of press rolls has also increased, so care must be taken to avoid abrasion on the back side of the base fabric used in needle felting. The processed and hardened material not only has good abrasion resistance, but also has a more incompressible base fabric structure, creating voids between the press roll nips to retain the water squeezed out of the wet paper. Since a larger amount can be secured, this is very preferable depending on the paper making conditions. Thermoplastic resins are also used, although thermosetting resins are more suitable for the purpose. Additionally, synthetic fiber monofilament may be used to ensure the incompressibility of the base fabric. According to the method of spelling cloth of the present invention, there are four weft threads forming a complete structure, but in each case, the part where one striped thread skips two warp threads in succession and the plain weave part appear equally, so , the shrinkage force of each weft yarn in the cloth width direction becomes equal, one weft yarn becomes taut and straight, and the other weft yarns do not become loose or curved. In addition, since the tension level is the same for all weft threads, a specific part of a specific striped thread does not become loose and wear quickly, so the service life becomes longer on average. Furthermore,
The parts of a particular weft thread that fly continuously over two warp threads do not intersect at right angles or obliquely to the warp threads, making the weave of the base fabric more uniform and reducing uneven pressure on the wet paper. , it becomes more uniform and helps improve water extraction. Further, since paper cloth is used in the form of a belt, ie, endless, bag weaving is usually performed.

On a loom, the warp is in the horizontal direction during use, and the weft is in the vertical direction during use. That is, 21', 22', 23', 24' in FIG. 1 or 31', 32', 33', 34' and 41 in FIGS. 2 and 3.
', 42', 43', 44' become the warp threads on a bag loom, so in the case of Fig. 1, the sets 21', 23' and 22'
, 24', the tension of the threads differs during weaving. However, in the case of FIGS. 2 and 3, since the number of thread intersections is the same for both threads, the tension of the threads is the same, and a cloth with a uniform texture can be obtained. In other words, the above-mentioned advantages can also be achieved in the case of hollow weave. Example 1 A polyamide multifilament of 840 denier was first twisted 600 times/meter in the S direction, and then three yarns were twisted in the Z direction 320 times/finally twisted, and 5 warp yarns/meter were twisted. The base fabric was woven according to the method of binding according to claim 2) (Fig. 2) so that the weft threads were 6 cm/cm.

A batt made of a mixture of 50% 15 denyl polyamide wool and 50% 10 denyl polyamide wool was layered on the back side of the base fabric and bonded by needling.

After that, the finished product was washed, burned, and heat set.

The finished weight of the base was 1290 mm, and the bat weight was 710 mm. In the No. 2 press part of a paper manufacturing machine for making newsprint, the service life of the conventional 2/2 slant pattern base fabric was 60 days, but the service life of the machine using the base fabric of this example was 71 days. The lifespan has been reached.

Example 2 Instead of using the same three-strand polyamide multifilament twisted yarn as in Example 1, a resin-treated twisted yarn coated with 10% of a phenol-formaldehyde thermosetting resin was used.

Claims: {3'' A base fabric with a weave method (Fig. 3) is woven to have the same thread density as in Example 1, the batt weight is adjusted to obtain the same weight, and needling is performed, followed by washing and wool. Finished by baking and heat setting. When used in the No. 3 press part of a newspaper manufacturing machine, the moisture content of wet paper decreased by 1.1% compared to conventional products, and the service life was 56%.
It has been extended to 75 days.

[Brief explanation of the drawing]

Figure 1A is an organization chart of a conventional 2/2 collapsing weave, Figure 1B is a plan view of the same, Figure 1C is an explanatory diagram of the state cut along each weft, Figures 2 and 3. Figure 2A shows the base fabric of the cloth of the present invention, Figure 2A is the organization chart, Figure 3B is an explanatory diagram of the state cut along each weft, Figure 3A is the organization chart, and Figure 3B is the organization chart along each weft. FIG. 21 to 28, 31 to 38, 41 to 48...
・Warp: 21' to 24', 31' to 34', 41'
〜44'・・・Striped yarn. Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. In a 2/2 collapsible weave consisting of 8 warps and 4 wefts, a portion where one weft passes over two adjacent warps; In the case of weft threads that have a portion passing under the warp threads and a portion where the weft threads pass alternately above and below the adjacent warp threads, and are driven back and forth, the above-mentioned
It is made by using a fabric as a base fabric that has a structure in which the parts where the weft threads pass above or below two adjacent warp threads do not touch each other, and the butts of fibers are bonded to the surface of this base fabric. Cloth for paper making. 2 For the base fabric of 2/2 shabby weave, the first warp runs below the first weft, above the second weft, above the third weft, below the fourth weft, and is above the 1st weft, below the 2nd weft, below the 3rd weft, above the 4th weft, and the 3rd warp is above the 1st weft, above the 2nd weft, 3 The 4th warp runs under the 1st weft, under the 2nd weft, above the 3rd weft, above the 4th weft, and below the 4th weft. The warp is above the 1st weft, below the 2nd weft, below the 3rd weft, and above the 4th weft, and the 6th warp is below the 1st weft, 2
The 7th warp is above the 1st weft, above the 2nd weft, below the 3rd weft, and below the 4th weft. The claim is that the eighth warp passes under the first weft, under the second weft, over the third weft, and over the fourth weft. The papermaking cloth according to item 1. The base fabric of 3 2/2 slant weave is the 1st warp under the 1st weft, above the 2nd weft, above the 3rd weft, below the 4th weft, and the 2nd warp is above the 1st weft, above the 2nd weft, below the 3rd weft, below the 4th weft, and the 3rd warp is below the 1st weft, below the 2nd weft, 3 The 4th warp is below the 1st weft, above the 2nd weft, above the 3rd weft, and below the 4th weft. The warp is above the 1st weft, below the 2nd weft, below the 3rd weft, and above the 4th weft, and the 6th warp is below the 1st weft, 2
The 7th warp is above the 1st weft, above the 2nd weft, below the 3rd weft, and above the 4th weft. The woven fabric is woven by passing under the weft, and passing the eighth warp over the first weft, under the second weft, under the third weft, and over the fourth weft. Paper-making cloth as described in Scope 1. 4. The papermaking cloth according to claim 1, wherein the butt is made of synthetic fiber.