JPH0529718B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing felt for papermaking, and more specifically to making felt endless.

<Prior Art> Conventionally, the following three methods have been used to make papermaking felt endless.

That is, the first method uses a bag weave during weaving or stitches both edges of a plain woven fabric to make it endless, while the second method uses small warps at both edges of the plain woven fabric. The third method is to form rings and join them to each other in the warp direction, and to connect them by passing a core wire of metal or synthetic fiber through the small rings located at this joining part, and to make them endless. By using a seam material such as a clipper seam or a spiral seam, the seam can be made endless.

Papermaking felts obtained by these methods have no seams or only one seam.

<Problems to be solved by the invention> The length of felt for paper making varies from long to short, with the longest being about 160 m and the shortest being less than 10 m. When weaving this felt by the first method of hollow weaving,
A loom with a reed width that is at least half the length of the felt is required. For this reason, the reed width for bag weaving is 5 m.
A loom with a reed width of 30 m or more is required, but due to manufacturing, strength, and cost issues, it is nearly impossible to manufacture a loom with a reed width of 30 m or more. Therefore, in such cases, the plain woven fabric of the first method is sewn to make it endless, but this sewing of the plain woven fabric also requires advanced technology and a large number of man-hours, which reduces felt productivity. This had become an impediment to improvement.

In addition, the second method of creating an endless shape requires a reed cloth loom that is close to the length of the felt, and can only be woven with a very limited length. This had problems, such as requiring great skill and a large number of man-hours.

Furthermore, in the third method, which uses seam materials such as clipper seams and spiral seams to create an endless shape, the thickness of the seam material part is thicker than the base part, which causes uneven thickness of the wet paper during paper making. However, there was a problem in that it could only be used for low-grade paper or felt for special parts, such as felt for dry parts.

<Means for Solving the Problems> The present invention has been made by focusing on the problems of the conventional method, and does not require the above-mentioned wide reed loom or the sewing process of plain woven fabric. The purpose of this papermaking felt is to produce papermaking felt that does not have uneven thickness, which occurs when seam materials such as clipper seams and spiral seams are used. A woven fabric forming a ring is woven, and then the warp of the woven fabric is cut along the weft direction according to a desired felt width dimension to form a plurality of small woven fabrics. The fabrics are joined together in the weft direction, and a common metal or synthetic fiber core wire is passed through and connected to the small rings of two adjacent small woven fabrics located at this joint to form a long woven fabric. After that, the edges of both sides of this long woven fabric are joined to each other, and the common core wire is passed through and connected to the small rings at both ends located at the joining site to form an endless woven fabric. It is characterized by

Hereinafter, the present invention will be explained in detail based on the drawings.

First, a woven fabric is woven in which a portion of the weft threads protrude from both ends of the woven fabric body to form small rings. This weaving is performed, for example, according to a mechanism as shown in FIG.

FIG. 1 schematically illustrates weaving, where 1 represents the diameter yarn, 3 represents the selvage yarn, and 2 represents the weft yarn. Ear thread 3
For example, a yarn made of a fiber material that can be easily melted, decomposed, or dissolved and removed by heat or a decomposing agent or solvent, or a blended yarn containing the fiber material is used.

The diameter thread 1 is preferably made of polyester, nylon, or other synthetic fiber with high heat resistance. The weft yarns 2 are preferably continuous yarns such as spun yarns, monofilament or multifilament bundled twisted yarns made of synthetic fibers having heat resistance and low elongation.

In Figure 1, warp groups 1, 1, 1 from the right direction a.
The weft yarn 2 reaches the left end after sequentially weaving ..., turns around via the selvage yarn 3, and advances toward the right while weaving the warp groups 1, 1, 1, and so on. Although not shown, the warp groups are continuous on the right side, and the weft 2 that reaches the right end turns and weaves the warp groups 1, 1, 1, etc. sequentially from the right direction, and this weft 2 reaches the left end. It turns around at the warp 1 at the left end without passing through the thread 3, and moves forward while weaving the warp groups 1, 1, 1, etc. in the d right direction.

Thereafter, steps a to d above are similarly repeated to obtain a woven fabric A'. Next, by treating this woven fabric A' with heat, a decomposing agent, or a solvent, the selvage threads 3 can be easily removed, and as shown in FIG. A woven fabric A can be obtained in which the woven fabric A has shapes r and r protruding from both side edges of the woven fabric body.

Furthermore, the present invention is capable of weaving not only the above-mentioned single-ply woven fabric A, but also double-woven fabric A ₁ and triple-woven fabric A ₂ as shown in FIGS. 3A and 3B.

The loom used in this process can be fully utilized as a normal felt loom, and an unnecessarily long reed width is not required. Further, the weaving length L of the woven fabric A at this time is preferably determined by the following formula.

Weaving length L of woven fabric Felt length/warping width on the loom x felt width In this case, make sure that the values of [felt length]/[warping width on the loom] are positive numbers. Adjust the warping width on the loom.

Next, a plurality of small woven fabrics _ao are obtained from the woven fabric A obtained in the above process.

As shown in FIG. 2, the warp 1 of the woven fabric A is cut along the three weft directions according to the desired felt width l, resulting in a plurality of small woven fabrics a ₁ , a ₂ , a ₃ . . . a _o . As shown in Fig. 4, these small woven fabrics a ₁ , _a 2 , a _{3 .} (r ₁ , r ₁ ), (r ₂ , r ₂ ), (r ₃ , r ₃ )...(r _o , r _o ).

Then, these small woven fabrics a ₁ , a ₂ , a ₃ . . . a _o are interconnected to obtain a long woven fabric.

As shown in FIG. 5, this long woven fabric 4 has a plurality of small woven fabrics a ₁ , a _{2 ,} a ₃ . small rings (r _{1 ,} r ₂ ), _{( r 2 , r 3 )} ... ₍ r _o-1 , r _o ) are connected by passing common metal or synthetic fiber core wires c ₁ , c ₂ , c ₃ . . . c _o-1 through them, respectively.

Thereafter, the long woven fabric 4 is further joined at both ends thereof, and a core wire c of metal or synthetic fiber common to the small ring rings (r ₁ , r _o ) at both ends located at this joining site is passed through. and are connected to form an endless woven fabric 5 (see FIG. 6). This endless woven fabric 5 becomes felt for papermaking.

<Example> Example 1 A woven fabric with a small ring of needle felt for paperboard with a felt length of 165 m and a width of 4.30 m (weaving width of 5.60 m) was warped to a warping width of 5.0 m using a loom with a reed width of 5.5 m. The weaving length was 184.8 m. 5.6 in the length direction after weaving
It was cut into m width to obtain 33 pieces of small woven fabric. These 33 pieces of small woven fabric are joined to each other, and a nylon monofilament with a diameter of 0.5 mm is passed through the small ring located at this joining part to connect them to form one endless piece of fabric.
This was used as a needle base fabric.

In the case of such cloth, according to the conventional method, a loom with a reed cloth of 6.0 m was required and a stitching operation was required after weaving, but in this embodiment, a loom with a length of 5.5 m is sufficient.
In addition, the work was simple because no suturing work was required.

Example 2 Felt length 40m, width 4.00m (weaving width
A woven fabric (double woven fabric using nylon filament for the warp and weft) with a small ring of needle felt for textiles (5.2 m) was woven to a length of 41.6 m using a weaving machine with a reed width of 5.5 m and a warping width of 5.0 m. It was woven into After weaving, the fabric was cut into lengths of 5.2 m in the same manner as in Example 1 to form a single endless fabric, which was used as a needle base fabric.

In this case, if the conventional method were followed, a loom with a reed width of 20 m would be required due to the use of bag weaving, but in this embodiment, a loom with a reed width of 5.5 m was sufficient.

<Effects of the Invention> According to the manufacturing method of the present invention, no matter how long the length of the felt is, a large loom is not required, and a woven cloth can be manufactured using a normal felt loom.

In addition, the present invention is suitable for weaving plain weave cloth due to the long length of the felt and the warp density during weaving.
Even in the case of sewn felt, it can be connected to a long length by passing the core wire through the small rings formed protruding from the side edges of the short woven fabric, eliminating the need for stitching and improving workability. It can be improved further.

Furthermore, since the thickness of the small ring according to the present invention is the same as that of the woven fabric, unlike felt which is made endless by employing seam materials such as clipper seams and spiral seams, it is similar to the base of the woven fabric. It can be made to the same thickness. Therefore, the felt according to the present invention can be used as a felt for high-quality, newspaper, paperboard, and all other types of paper making.

Furthermore, the present invention enables weaving of single-ply and multiple-ply woven fabrics such as double, triple, or quadruple, and also allows easy production of base fabrics for woven felt and needle felt.

[Brief explanation of drawings]

Fig. 1 is an enlarged plan view of the vicinity of the selvage of the woven fabric for explaining an example of the weaving mechanism of the endless paper-making woven fabric according to the present invention, Fig. 2 is a perspective view of the same woven fabric, and Fig. 3 A is the same as the above. FIG. 4 is a partially omitted side sectional view of the small woven fabric of the present invention; FIG. 5 is a side sectional view of another embodiment of the woven fabric; is a partially omitted side sectional view of a long woven fabric in which the same small woven fabrics are connected;
FIG. 6 is a schematic explanatory diagram for explaining how the long woven fabric is made endless. 1... warp, 2... weft, 3... selvage thread, 4...
Long woven fabric, 5...Endless woven fabric, A, A', A ₁ , A ₂ ...
...Woven cloth, a ₁ , a ₂ , a ₃ ... a _o ... Small woven cloth, c ₁ , c ₂ , c ₃
...c _o ... core wire, r ₁ , r ₂ , r ₃ ... r _o ... small ring, l...
...Felt cloth.

Claims (1)

[Claims] 1. Weave a woven fabric in which a part of the weft itself protrudes from both side edges of the woven fabric body to form a small ring, and then the woven fabric is threaded along the weft direction according to the desired felt width dimension. is cut to form a plurality of small woven fabrics, and the plurality of small woven fabrics are joined together in the weft direction, and a common ring is formed between the small rings of two adjacent small woven fabrics located at this joining site. Core wires of metal or synthetic fibers are passed through and connected to form a long woven fabric, and then both side edges of this long woven fabric are joined to each other, and small ring rings at both ends located at this joining site are formed. A method for producing felt for papermaking, characterized in that the above-mentioned common core wires are passed through and connected to form an endless woven fabric.