JPS6035478B2 - Paper making cloth - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to cloth for papermaking, and aims to improve abrasion resistance, improve water squeezing, and improve dimensional stability during needle punching. 2
The striped threads floating on the front and back sides of the book are suppressed from above and below by thin auxiliary warp threads, thereby eliminating slack in the warp threads.

A 2/2 collapsed oblique texture is used as the base fabric for papermaking cloth, but the collapsed oblique texture is less likely to produce cloth marks than a plain weave texture or a regular oblique weave. , the number of weft threads can be increased, so it is a useful structure.

However, the above-mentioned 2/2 collapsed oblique texture also has the following disadvantages.

In other words, this 2/2 collapsed oblique structure is evident from the slope diagram shown in Figure 3A and the organization chart shown in Figure 3B.
The first weft 11' floats on the back side of the first and second warp yarns 11 and 12, and then floats on the surface of the third and fourth warp yarns 13 and 14, and then the second The striped yarn 12' is woven with the same structure as the plain weave, which is exposed on the front side for the first and third warp yarns 11 and 13, and is exposed on the back side for the second and fourth bonito yarns 12 and 14, The number 3 spear thread 13' is facing the opposite side of the first twill thread 11', and the number 4 silk thread 14' is facing the same way as the second twill thread 12'. In other words, the number of weave points is the same as the 2/2 diagonal weave, but since the second and fourth striped yarns 12' and 14' are woven in a plain weave, 1st and 3rd weft threads 11',
Compared to 13', the number of weave points is twice as large, and the warp yarns are bent more accordingly. ',1
It becomes larger than 3'.

As a result, the first and third twill threads 11' and 13' are the second,
Compared to the No. 4 total yarns 12' and 14', they tend to loosen, and the floating portions 36 and 31 above and below the two warp yarns cause bulges on the outer surface of the cloth. Therefore, needle felting for paper making is made using the above-mentioned 2/2 crumbling oblique weave base fabric.

When the base fabric 32 and the wrap 33 are overlapped in the needle ring process, the two twill yarns 11' and 13' are pushed downward by the needle 34, and the sagging becomes even more severe. During use, that part will wear unevenly, and eventually the thread will break, making it unusable. In addition, silk threads that are woven in a way such as striped threads 11' and 13' are
The weaving tended to be slightly diagonal to the warp threads, which created non-uniformity in the texture of the base fabric, resulting in uneven microscopic pressure distribution on the wet paper, which had a negative impact on the water squeezing of the diagonal paper. . The present invention has been made in order to solve the above-mentioned disadvantages of the conventional 2/2 collapsing oblique texture base fabric, and FIG. 1 is a perspective view of the base fabric structure, and FIG. 4 is a perspective view of the base fabric structure. Shows an organizational chart.

The papermaking cloth of the present invention will be explained in detail below based on FIGS. 1 and 4.

Between the first warp thread 11 and the second warp thread 12, and between the third warp thread 13 and the fourth warp thread 14 (this is repeated hereafter), there are splint threads (warp threads) that are thinner than the warp threads. )
15 and 16 are inserted individually, warped, and woven with the modified structure shown below so that one original structure is composed of six warp yarns, four weft yarns, and both warp and warp yarns.

That is, the first weft 11' is the warp 11, 15, 12.
, 13, 16, and 14 are woven in a plain weave pattern by repeating the upper and lower parts alternately, and the second striped thread 12' is woven under the adjacent thin sewing threads 15, 12 and 16, 14. The third twill yarn 13' is woven so as to pass through the first striped yarn 11.
'The warp threads 11, 15, 12, 13,
16 and 14 are woven in a plain weave pattern by repeating the top and bottom alternately, and the fourth striped thread 14' is interwoven with the adjacent thick and thin warp thread 1.
1, 15 and 13, 16, said slack portions 31, of the wefts 11' and 13'
36 are lifted individually using the pongee warp threads 15 and 16.

Comparing the thickness of the fine warp yarns 15 and 16 used here with the original warp yarns 11, 12, 13, and 14 of the base fabric, the appropriate denier count is 1:2 and 1:10. The reason why there is a wide range is that when the fine warp yarns 15 and 16 are monofilament or multifilament twisted yarns, the apparent diameter appears small compared to the denier, and the warp yarns 11 of the base fabric
The ratio of ~14 is close to 1:2, making it thin and soft, and the apparent diameter of the thread appears to be large, so the above ratio is 1:1.
This is because it becomes close to 0.

However, without adhering to this principle, it is possible to maintain the balance between the thickness of the warp and striped threads and the necessary strength as the weaving sewing threads 16, 16, and also to maintain the necessary strength as the threads of the base fabric, which are integrally combined with the wrap by needling. It is sufficient that the pongee warp threads 15 and 16 have a thickness that allows them to function as part of the wrap without interfering with the spacing between the warp threads 11 to 14 of the base fabric's main hook. However, to fulfill the role of rap,
Since stabilizing the position of the weft yarns may not be consistent with each other, it is necessary to use filament twisted yarns and spun yarns as yarns for Tsumugi Ryu yarns 15 and 16 depending on the purpose, but this is due to the synthetic fibers. In addition to being used alone, it is sometimes necessary to employ twisted yarns that are a mixture of synthetic fibers and natural fibers.
It is also necessary to process the pongee warps 15 and 16 made of these materials with resin. In the papermaking cloth of the present invention, the pongee warp threads 15 and 16 are individually inserted between the warp threads 11 and 12 and between the warp threads 13 and 14. Striped thread floating on the front and back of the book 11', 1
A part of the warp threads 11' and 13' can be pressed from above and below in a plain weave form by the warp threads 15 and 16, thereby eliminating slack and sagging of the warp threads 11' and 13', thereby eliminating width shrinkage during the needling process. , when used as needle felt, the warp 1 1,
12, 13, and 14, the pressurizing effect on the wet paper is superior to that of the conventional one, improving the water squeezing effect, and also completely reducing uneven wear of the base fabric. It has the effect of eliminating this problem and extending its useful life.

As a supplementary explanation, since papermaking cloth is used in the form of an endless belt, it is usually formed by bag weaving, but for this reason, on the loom, the warp threads are oriented in the horizontal direction, and the warp threads are oriented in the longitudinal direction. The weft threads will be oriented.

Therefore, as is clear from FIGS. 5 and 6, the threads corresponding to the warp threads 11, 12, 13, and 14 shown in FIG. 3B are 21', 22', 23', and 24' in FIG. Yes, the threads corresponding to striped threads 11', 12', 13', 14' are 24,
23, 22, 21. Similarly, the warps 11, 15, 12, 13, 16, 14 in FIG. 4 showing the present invention are 21', 15', 22', 23', 16 in FIG.
', 24', and the total threads 11', 12', 13 in Figure 4
The threads corresponding to ', 14' are 24, 23, 2 in Figure 6.
2.21. Examples of the present invention will be shown below.

Example 1 A polyamide multifilament of 840 denier was first twisted in the S direction at 600 times/m, three of these first twisted yarns were twisted together, and the twisted yarns were twisted in the Z direction at 320 times/m as warp and warp yarns. The warp threads are warped to 6.4 threads/c.

Next, when inserting the striped yarn at a rate of 6.0 threads/cM, nylon spun yarn, which is thinner than the above-mentioned twisted yarn with a 9-torque count, was used as the splicing yarns 15 and 16 to create the structure shown in Figure 6. Weave the base fabric according to the diagram. Next, a wrap of 50% 15 denier polyamide staples and 50% 6 denier polyamide staples was laid on the surface of the base fabric and bonded together by needling.

Thereafter, washing, burning, and heat setting are performed to obtain a cloth with a finished weight of 1230 mm/cm (inner pad weight of 600 mm/cm).

According to this example, the dimensional change in the width direction during needle punching was 76.5%, which was previously 67 to 72%.
As a result, it was used in the No. 3 press part of a newspaper paper manufacturing machine, and as a result, it was able to withstand use for 75 days.
The durability has been significantly improved compared to the conventional cloth using a base fabric with a 2'2 diagonal structure, which had an average service life of 65 days.

This is due to uniform wear on the back side of the base fabric.

Example 2 A resin-treated twisted yarn made by adhering 10% of phenol formaldehyde resin to the same three-strand polyamide multifilament yarn as in Example 1 was used as the warp and warp threads, and a splint yarn of 15
, 16, a base fabric is woven in the same manner as in Example 1 using 400 turns/m rattan yarn of 630 denier polyamide multifilament.

Next, a wrap consisting of 30% wool, 35% 10 denier polyamide staples, and 35% 15 denier polyamide staples is layered on the surface of the base fabric, bonded together by needling, and finished by a conventional method.

In this example, the dimensional change in the width direction during needle punching was 82%.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the base fabric of the papermaking cloth according to the present invention;
Figure 2 is an explanatory diagram showing a state in which a cloth using a conventional 2'2 crumbly twill weave base fabric is cut along the No. 1 silk thread; Figure 3A is an oblique view of the base fabric of the cloth; Figure 3B is the same organization chart, Figure 4 is the organization chart of the base fabric of the cloth of the present invention, Figure 5 is the organization chart when Figure 3B is weaved in a bag, and Figure 6 is the organization chart in the case where Figure 4 is weaved in a bag. This is an organizational chart. In the drawings, 11, 12, 13, 14, 21, 22, 23,
24...Warp, 11', 12', 13', 14', 21'
, 22', 23', 24'...silk thread, 15, 16, 15'
, 16'... Thin warp thread (splicing thread), 32... Base fabric, 31, 36
...Sagging part. 6th belt - 2nd and 3rd map A Western 3rd map B 4th belt and 5th map

Claims (1)

[Scope of Claims] 1. A diagonal weave having a 2/2 collapsed diagonal weave as the original texture is woven using both weft and warp yarns of a required thickness, and the first and second warp yarns of the same weave are woven. A splint consisting of a thin thread is interposed between the warp threads and the third and fourth warp threads, and a splint thread made of thin threads is interposed between the two warp threads at locations where the thick warp threads are adjacent to each other and appear on the surface in the above original structure. The base fabric is a coarsely textured modified oblique weave fabric so that the thin splints appear on the back side, and all other areas appear on the front side, and fiber butts are added to the surface of the base fabric. , a papermaking cloth whose constituent fibers are entangled and bonded together by needling. 2. The papermaking cloth according to claim 1, wherein the ratio of the thickness of the splint threads to the thickness of the base warp threads is from 1:2 to 1:10 when expressed in denier. 3. The papermaking cloth according to claim 1, wherein the splint yarn is made of polyamide multifilament or polyamide spun yarn. 4 The warp and weft of the base fabric are 630 denier to 105 denier
0 denier polyamide multifilament twisted at a rate of 300 to 800 times/meter, combined with three more twisted yarns, reverse twisted and twisted at a rate of 150 to 600 times/meter, and used as a splicing yarn of 7 .00 to 17.
The papermaking cloth according to claim 1, which uses spun yarn of 0.00 meter count all-all fibers.