JP3178942B2 - Method for producing fiber bundle laminate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a fiber using a spinning clues gold
The present invention relates to a method for manufacturing a bundle laminate .

[0002]

2. Description of the Related Art A spinneret having a plurality of spinning holes is widely used for spinning various fibers. For example, a bundle of fibers such as cellulose acetate spun from a spinneret is obtained to obtain a fiber bundle, and a plurality of these fiber bundles are laminated to form a plate-like fiber bundle laminate, and then crimped to obtain a cigarette filter or the like. A fiber bundle product can be manufactured.

A spinneret plate having a plurality of spinning holes has conventionally been formed in a circular planar shape. When a spinning hole is formed in such a die plate, the spinning hole is usually formed on a concentric circumference. But with this method,
Since the circumferences forming the spinning holes differ depending on the radius, it is extremely difficult to form the spinning holes, particularly holes on the circumference adjacent to each other at equal intervals. Therefore, a spinneret for obtaining a fiber bundle having a uniform fiber density cannot be easily manufactured. Further, since the holes are not arranged on a straight line passing through the center of the circle, the arrangement inspection of the spinning holes cannot be performed easily and efficiently.

FIG. 4 is a schematic process diagram showing a process for producing a fiber bundle laminate from fibers spun using a conventional spinneret having a circular die plate. When spinning is performed by a spinneret having a circular die plate, bundled fibers 11 having a circular cross section are obtained corresponding to the planar shape of the die plate. The fibers are bundled into a fiber bundle 12, and a plurality of fibers are laminated in the vertical and horizontal directions to obtain a fiber bundle laminate 13. In this case, even if the spinning holes are formed at equal intervals, the fiber bundle 9 has a substantially elliptical columnar shape, so that the fiber density is lower at both ends in the long axis direction than at the center. Moreover, a gap is formed between each fiber bundle. For this reason, even if the fiber bundle laminate thus obtained is crimped, a high-performance tobacco filter or the like having a uniform fiber density cannot be obtained. Further, since the fiber bundle has a substantially elliptical columnar shape, it easily rolls and is inferior in positioning stability. Therefore, the workability when laminating fiber bundles or subjecting the obtained laminate to post-processing is likely to be reduced.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a spinneret capable of easily and efficiently forming spinning holes arranged at equal intervals and capable of easily performing an inspection of the alignment of the spinning holes. Efficient production of fiber bundle laminates
It is to provide a method that can be used .

Another object of the present invention is to provide a method of obtaining a laminate of fiber bundles having a uniform fiber density and improving the workability of post-processing of spun fibers.

[0007]

Means for Solving the Problems The inventors of the present invention have made intensive studies to achieve the above object, and have found that the bundled fibers correspond to the planar shape of the die plate, and that the planar shape of the die plate is polygonal. That the spinning holes can be easily formed in the vertical and horizontal directions, so that the alignment inspection and the defect inspection of the spinning holes can be easily performed, and that the fiber bundle obtained by such a spinneret has edges and is excellent in stability and easy to be laminated. And find
The present invention has been completed. That is, the present invention provides a spinning method using a spinneret having a plurality of spinning holes formed in a die plate,
A method for manufacturing a laminate of a bundle , wherein the base plate
Using a spinneret with a square planar shape, spin from the spinneret.
The yarns are bundled to form a flat surface on the fiber bundle,
A method for producing a fiber bundle laminate is provided.

2. A spinneret in which spinning holes are arranged in a staggered manner .
The process according to claim 1, wherein there.

[0008]

In the spinneret having the above structure, a plurality of spinning holes are formed in the spinneret, so that a bundle of fibers can be obtained by spinning.

Moreover, the spinneret because the planar shape of the base plate is a four square, it is possible to form the spinning holes in the vertical and horizontal direction of the base plate. For this reason, spinning holes at equal intervals can be easily and efficiently formed in the die plate. Therefore, when inspecting the arrangement of the spinning holes, it is relatively easy to determine whether or not the positions of the holes are accurate. In addition, for example, when inspecting the spin hole for defects after use or after washing,
The positioning of the spinning hole is easy, and it is possible to easily inspect for defects such as clogging of the spinning hole.

[0010] Further, when the fiber spun from the spinneret is bundled to obtain a fiber bundle, and a plurality of the fiber bundles are laminated to form a plate-like fiber bundle laminate, the fiber bundle has a flat surface instead of a curved surface. The formation can increase the stability, and it is difficult for gaps to be formed between the fiber bundles.

Accordingly, a fiber bundle laminate having a uniform fiber density can be obtained, and work efficiency can be significantly improved.

Furthermore, the stability of the obtained fiber bundle and the workability in laminating are extremely improved.

In the spinneret in which the spinning holes are arranged in a staggered manner, the positioning of the spinning holes is easy and the spinning holes are arranged regularly, so that the spinning hole arrangement inspection can be easily performed. .

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a spinneret according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic perspective view showing one embodiment of the spinneret of the present invention. FIG. 2 is a partially cutaway schematic plan view showing a spinneret plate of the spinneret of FIG. 1. FIG. 3 is a schematic process diagram showing a process of manufacturing a fiber bundle laminate from fibers spun using the spinneret of FIG. 1.

A spinneret 1 shown in FIG. 1 has a square shape, a square shape in plan view, a spinneret plate 2 in which a large number of spinning holes 4 are formed, and a peripheral edge of the spinneret plate 2. It is composed of side walls 3.

Since the base plate 2 has a square planar shape,
The spinning holes can be easily formed at equal intervals in the vertical and horizontal directions.

The size of the die plate 2 is appropriately determined within a range where the spinning is smoothly performed.
The thickness is about 500 mm and the thickness is about 0.2 to 15 mm.
The height of the side wall 3 is, for example, about 5 to 100 mm. Note that a flange may be formed at the upper end of the side wall 3 for connection with a pipe or the like.

In this example, the spinning holes 4 are arranged in a staggered shape. Further, three spinning holes adjacent to each other are formed so as to be located at the vertices of an equilateral triangle, respectively.
Therefore, the number of holes in the vertical and horizontal directions is substantially equal, the positioning of the spinning hole is easy, and the spinning hole can be efficiently drilled. Also, because the arrangement of the spinning holes is regular,
It is easy to check whether the position of the hole is accurate. Furthermore, when spinning, bundled fibers having a uniform fiber density are obtained.

The number of the spinning holes 5 can be appropriately selected depending on the type and use of the fiber. For example, 0.04 to 2000 / c
m ² , preferably about ² to 200 / cm ² .

The spinning hole 4 usually has an introduction part for introducing a spinning solution and a discharge part formed below the introduction part for discharging fibers. As the shape of the introduction portion, for example, an inverted truncated cone shape such as an inverted truncated cone shape is exemplified. The shape of the discharge portion can be appropriately selected depending on the type and use of the fiber, for example, a columnar shape;
Examples include polygonal columns such as a triangular column, a quadrangular column, and a pentagonal column, and other columnar shapes having an irregular cross section.

The length of the introduction portion is, for example, 0.1 to 10
mm, the length of the discharge section is, for example, 0.001 to 1
mm. Further, the length of the introduction portion is, for example, 80 to 99.9%, preferably 9%, with respect to the thickness of the die plate.
The discharge portion has a length of, for example, 0.1 to 20%, preferably 1 to 10%, based on the thickness of the die plate.
%. The opening diameter of the introduction portion is, for example, 0.1 to
About 10 mm, the hole diameter on the ejection part side is, for example, 0.005 to
It is about 2 mm. Also, the hole diameter of the introduction section on the discharge section side is:
It is, for example, about 0.5 to 50%, preferably about 1 to 10% with respect to the opening diameter of the introduction portion. The hole diameter of the discharge section is, for example, about 0.005 to 2 mm.

The spinning hole is formed by, for example, punching,
Drilling can be performed by cutting with a drill or the like, laser processing, or a combination thereof.

The spinneret of the present invention can be used in any spinning method such as a wet spinning method, a dry spinning method and a melt spinning method. A fiber bundle is obtained by introducing a spinning solution into the introduction section of the spinneret and spinning from a discharge section. Examples of the fibers include cellulose acetate, polyacrylonitrile, polyurethane, polyvinyl chloride, viscose rayon, nylon, and polyester.

By spinning using this spinneret, bundle-shaped fibers 5 having substantially the same number of strands in the vertical and horizontal directions are obtained, and when these are bundled, a substantially rectangular parallelepiped fiber bundle 6 corresponding to the planar shape of the die plate is obtained. Is obtained. By stacking the obtained fiber bundles 6, for example, 16 bundles, a fiber bundle laminate 7 can be obtained.
Also, by laminating a plurality of fiber bundles 6, fiber bundle laminates 8 to 10 can be obtained. Since the fiber bundle 6 is a substantially rectangular parallelepiped, the uniformity of the fiber density in the fiber bundle 6 is high, and the working efficiency at the time of lamination is improved. Further, a gap is hardly generated between the laminated fiber bundles. Therefore, by subjecting the fiber bundle laminate to crimping and other subsequent steps,
For example, a fiber product such as a high-quality tobacco filter having a uniform fiber density can be efficiently produced.

The planar shape of the base plate 2 is a rectangle such as a rectangle or a parallelogram . From the viewpoint of the stability of the obtained fiber bundle and the laminating workability, in particular, a square, particularly a square or a rectangle, is frequently used as the planar shape.

The arrangement of the spinning holes is preferably such that adjacent spinning holes are substantially equidistant from each other. Preferable arrangements include a lattice shape and the like in addition to the staggered shape. A particularly preferred arrangement includes a staggered shape. Above all, a staggered arrangement in which the adjacent spinning holes are located at the vertices of an equilateral triangle or square, particularly at the vertices of an equilateral triangle, is preferable.

[0028]

According to the method of the present invention, the spinneret can be smelled.
In addition , spin holes arranged at equal intervals can be easily and efficiently created, and the arrangement inspection of the spin holes and the defect inspection after use or after washing can be easily performed .
Using a spinneret to prevent rolling of fiber bundles
In addition, the lamination stability can be improved, a laminate of fiber bundles having a uniform fiber density can be obtained, and the post-processing efficiency of the spun fibers can be increased.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing one embodiment of a spinneret of the present invention.

FIG. 2 is a partially cutaway schematic plan view showing a spinneret of the spinneret of FIG. 1;

FIG. 3 is a schematic process diagram illustrating a process of manufacturing a fiber bundle laminate from fibers spun using the spinneret of FIG. 1;

FIG. 4 is a schematic process diagram showing a process of manufacturing a fiber bundle laminate from fibers spun using a conventional spinneret.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Spinneret 2 ... Spinneret 3 ... Side wall 4 ... Spinning hole 5, 11 ... Spun fiber 6, 12 ... Fiber bundle 7, 8, 9, 10, 13 ... Fiber bundle laminated body

Claims (2)

(57) [Claims] 1. A method of manufacturing a fiber bundle laminate by spinning using a spinneret having a plurality of spinning holes formed in a die plate , wherein the die plate has a square planar shape.
Using a plate, the fibers spun from the spinneret are bundled into a fiber bundle.
Who produce a fiber bundle laminate by forming a flat surface on
Law . 2. A spinneret in which spinning holes are arranged in a staggered manner .
The process according to claim 1, wherein there.