JP2799729B2 - Endless fabrics and endless papermaking fabrics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] In the present invention, an extensible heat-shrinkable polyamide monofilament for an endless woven fabric and an extensible heat-shrinkable polyester monofilament for an endless woven fabric are arranged at least on a weft. The present invention relates to a wear-resistant endless fabric, particularly to a wear-resistant papermaking fabric.

[Related Art] There are many endless woven fabrics conventionally used, such as, for example, a conveyor belt, a dewatering belt, an overcloth, a power transmission belt, a dry canvas for papermaking, a felt for papermaking, and a woven fabric for papermaking. All of these endless fabrics receive strong tension in the warp direction during use, so they expand in the warp direction and shrink in the weft direction, that is, the length is reduced in length, and the length is also increased in the vertical direction due to the load in the vertical direction. There is a problem that posture stability is poor because of contraction. In addition, there is another problem that abrasion resistance must be high because the abrasion is caused by contact with a driving roll, a control roll and the like during traveling. In addition, the running surface must be smooth for smooth running, and the upper surface needs to be flat in view of placing an object on the running surface. Such problems are common to endless woven fabrics, but have not yet been satisfactorily solved. The present invention has solved these problems.

Among the endless fabrics, the most demanding of these properties is a papermaking fabric. Papermaking fabrics are required to have various performances unique to papermaking in addition to the above-mentioned performances.However, if the common problems described above for papermaking fabrics are described, almost all problems common to endless fabrics and their solutions can be explained. Because it can be understood, the present invention will be described below with paper fabrics as a representative.

In addition to the above problems, there are more demands for papermaking fabrics than before. Broadly speaking, (a) problems related to paper quality itself, such as preventing the occurrence of wire marks and sufficient entanglement of paper fibers, or problems with papermaking yield, (b) improving abrasion resistance, extending the service life of textiles, (C) Good aqueous problems. Although each of the problems is often related to each other, roughly speaking, the problem (a) is mainly related to the structure of the papermaking surface of the fabric.
(B) is closely related to the structure of the running side surface of the fabric, and (c)
Is a problem for the whole fabric.

Conventionally, many proposals have been made for the solution (a). However, the problem of (b), that is, the improvement of the wear resistance of the papermaking fabric has not been sufficiently devised, and the running side of the papermaking fabric is of a weft-wear type, and is limited to the extent of preventing warp abrasion. .

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

Generally speaking, from the viewpoint of the stability of the posture of the woven fabric during use and the extension of the service life, it is desirable that the endless woven fabric, including the woven fabric for papermaking, exert a wear-resistant action on the weft on the running surface.
When the warp wears, the dimensions of the fabric change, and when the warp wears and cuts, the fabric itself cuts directly,
This is because the warp abrasion type woven fabric has a short service life.

Conventionally, in order to improve such abrasion resistance, an attempt has been made to use a polyamide yarn having abrasion resistance for the weft, but this attempt does not change the structure of the woven fabric itself, but simply uses it. No epoch-making effect can be obtained merely by utilizing the properties of the material. On the other hand, the papermaking woven fabric using polyamide yarn has a drawback that posture stability is poor.

Therefore, conventionally, a papermaking woven fabric which is hard to stretch and has excellent posture stability has been constituted by using a polyester yarn having excellent rigidity for both the warp and the weft.

Further, even in such a conventionally used papermaking fabric, in order to satisfy the above-described various requirements, it has been attempted to use a thick wire diameter yarn as the weft on the running side of the papermaking fabric,
Although the abrasion resistance can be improved to some extent, there are drawbacks in that the weft yarn is so thick that the balance between the weft yarn and the warp yarn is lost, the crimping property is deteriorated and wire marks are generated, and there are too many practical problems. .

Further, as understood from the above problem (c), if the structure of the woven fabric changes, the water is affected, and the problem cannot be solved by palliative means such as simply increasing the thickness of the weft.

[Problems to be Solved by the Invention] In view of the problems of the conventional techniques as described above, the present inventor has found that, when an endless fabric is formed, particularly excellent wear resistance,
Improve the structure of endless woven papermaking fabric by arranging special stretchable heat-shrinkable polyamide monofilament and stretchable heat-shrinkable polyester monofilament at least in combination with the weft to provide posture stability and surface smoothing effect. In addition, the abrasion resistance is improved and the papermaking performance such as water-based property and wire mark property, which are problems specific to papermaking fabrics, is also improved.

[Means for Solving the Problems] The present invention relates to the following: 1. The weft has an elongation of 6% or more with respect to a load change of A.1.25 g / d to 1.75 g / d, and when immersed in boiling water, Extensible heat-shrinkable polyamide monofilament with a heat shrinkage of 7% or more and B. Under a load range of 0.5 g / d to 2.5 g / d, plastic deformation occurs, and the elongation at this yield point is 1 to 10%. Endless woven fabric that is combined with an extensible heat-shrinkable polyester monofilament that has a heat shrinkage of 7% or more when immersed in boiling water. 2. A. Load the weft at a speed of 2 / mm. An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more for a load change of 1.25 g / d to 1.75 g / d when added, and a heat yield of 3% or more when immersed in boiling water. B. When a load is applied at a speed of 2 mm / min, plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, and at this yield point Endless woven fabric, which is used in combination with an extensible heat-shrinkable polyester monofilament having an elongation of 1 to 10% and a heat shrinkage of 7% or more when immersed in boiling water. An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more for a load change of from 1.25 g / d to 1.75 g / d and a heat shrinkage of 7% or more when immersed in boiling water; Under the load range of 0.5 g / d to 2.5 g / d, plastic deformation occurs, the elongation at this yield point is 1 to 10%, and the heat shrinkage when immersed in boiling water is 7% or more. An endless papermaking woven fabric comprising a heat-shrinkable polyester monofilament in combination.

4. When the A. load is applied to the weft at a speed of 2 / mm, the elongation is 6% or more for a load change of 1.25 g / d to 1.75 g / d, and the heat shrinkage when immersed in boiling water is E. Extensible heat-shrinkable polyamide monofilament of 7% or more, B. When a load is applied at a speed of 2 mm / min, plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, and at this yield point An endless papermaking woven fabric comprising an elongation of 1 to 10% and an extensible heat-shrinkable polyester monofilament having a heat shrinkage of 7% or more when immersed in boiling water.

5. At least the weft of the endless weft multiple woven fabric in which the weft is arranged in upper and lower multilayers has an elongation of 6% or more with respect to a load change of A.1.25 g / d to 1.75 g / d. B. plastic deformation occurs at a load range of 0.5 g / d to 2.5 g / d with an extensible heat-shrinkable polyamide monofilament having a heat shrinkage of 7% or more, and the elongation at this yield point is 1 to 10%. And an extensible heat-shrinkable polyester monofilament having a heat shrinkage of 7% or more when immersed in boiling water.

6. At least to the weft of the endless multi-layer woven fabric in which wefts are arranged in upper and lower layers, A. When a load is applied at a speed of 2 / mm, the elongation is 6% for a load change of 1.25 g / d to 1.75 g / d. The heat-shrinkable polyamide monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water and B. 0.5 g / d to 2.5 g / d when a load is applied at a speed of 2 mm / min. Plastic deformation occurs in the load range of d, the elongation at this yield point is 1 to 10%, and the heat shrinkage percentage when immersed in boiling water is 7% or more. Endless woven fabric that is arranged.

7. At least the weft of the endless multi-layer woven fabric in which the weft is arranged in multiple layers above and below the papermaking surface and running surface has an elongation of 6% or more for a load change of A.1.25 g / d to 1.75 g / d, Heat-shrinkable polyamide monofilament having a heat shrinkage of 7% or more when immersed in B. Plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, and the elongation at this yield point is An endless weft multiplex papermaking woven fabric comprising 1 to 10% and a stretchable heat-shrinkable polyester monofilament having a heat shrinkage of 7% or more when immersed in boiling water.

8. A. A load change of 1.25 g / d to 1.75 g / d when a load is applied at least at a speed of 2 / mm to at least the weft of an endless multi-layer woven fabric in which the weft is arranged in multiple layers above and below the papermaking surface and running surface. On the other hand, an extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more and a heat shrinkage of 7% or more when immersed in boiling water, and B. 0.5 when a load is applied at a speed of 2 mm / min. g / d to 2.5 g / d load range, plastic deformation occurs, the elongation at this yield point is 1 to 10%, and the heat shrinkage when immersed in boiling water is 7% or more. Endless weft multi-layer papermaking woven fabric comprising shrinkable polyester monofilaments.

9. At least 6% of elongation of at least the weft on the running surface of the endless weft multi-layer woven fabric in which the weft is arranged in multiple layers above and below the papermaking surface and the running surface with respect to the load change of A.1.25g / d to 1.75g / d. A heat-shrinkable polyamide monofilament having a heat shrinkage of 7% or more when immersed in boiling water, and a heat-shrinkable polyamide monofilament having a heat shrinkage of 7% or more; B. a load range of 0.5 g / d to 2.5 g / d Plastic deformation occurs, the elongation at this yield point is 1 to 10%, and when immersed in boiling water, the heat shrinkage rate is 7% or more. , Endless weft multiplex papermaking fabric.

10. When applying a load of at least 2 mm / min to the weft on the running surface of the endless weft multi-layer woven fabric in which the weft is arranged in the upper and lower multilayers of the papermaking surface and the running surface at a speed of 2 mm / min, 1.25 g / d to 1.75 g /
e. an extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more and a heat shrinkage of 7% or more when immersed in boiling water with respect to a load change of d, and B. applying a load of 2 mm / min. 0.5g / d to 2.5g / d when added at
Plastic deformation occurs in a load range of 1 to 10%, the elongation at this yield point is 1 to 10%, and when immersed in boiling water, the heat shrinkage is 7% or more. Endless weft multiplex papermaking fabrics arranged.

11. At least at the weft of a weft multi-layer fabric in which wefts are arranged in upper and lower layers, (A) a. When the load changes from 1.25 g / d to 1.75 g / d, the elongation is 6% or more, and when immersed in boiling water B. Plastic deformation occurs in a heat-shrinkable polyamide monofilament having a heat shrinkage ratio of 7% or more and a load range of 0.5 g / d to 2.5 g / d, and the elongation at this yield point is 1 to 10%. And at least one extensible heat-shrinkable monofilament selected from extensible heat-shrinkable polyester monofilaments having a heat shrinkage of 7% or more when immersed in boiling water; and (B) ordinary polyamide monofilament and polyester monofilament An endless woven fabric comprising at least one monofilament selected from the group consisting of:

12. At least 1.25 g / d when a load is applied at a speed of 2 mm / min to at least the weft of a weft multi-layer fabric in which wefts are arranged in upper and lower multilayers.
An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of ~ 1.75 g / d and a heat shrinkage of 7% or more when immersed in boiling water; and b. A load of 2 mm / min. 0.5g / d to 2.5g / d when added at the speed of
Plastic deformation occurs in the load range, the elongation at this yield point is 1 to 10%, and when immersed in boiling water, the heat shrinkage rate is 7% or more selected from extensible heat-shrinkable polyester monofilaments. Endless woven fabric comprising at least one extensible heat-shrinkable monofilament and (B) at least one monofilament selected from ordinary polyamide monofilament and polyester monofilament. 13. Weft yarn multiplex in which wefts are arranged in upper and lower multilayers. (A) a. The elongation is 6% or more for a load change of 1.25 g / d to 1.75 g / d, and the heat shrinkage when immersed in boiling water is 7% or more. Extensible heat-shrinkable polyamide monofilament and b. Plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, and the elongation at this yield point is 1 to 10%. At least one extensible heat-shrinkable monofilament selected from extensible heat-shrinkable polyester monofilaments having a heat shrinkage of 7% or more when immersed, and (B) at least one selected from ordinary polyamide monofilaments and polyester monofilaments Endless weft multi-layer papermaking fabric made by combining and using one monofilament.

14. At least 1.25 g / d when a load is applied at a speed of 2 mm / min to at least the weft of a weft multi-layer fabric in which wefts are arranged in upper and lower layers.
An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of ~ 1.75 g / d and a heat shrinkage of 7% or more when immersed in boiling water; and b. A load of 2 mm / min. 0.5g / d to 2.5g / d when added at the speed of
Plastic deformation occurs in the load range of, the elongation at this yield point is 1 to 10%, and when immersed in boiling water, the heat shrinkage is at least 7% or more selected from extensible heat-shrinkable polyester monofilaments. An endless weft multi-ply papermaking woven fabric comprising one stretchable heat-shrinkable monofilament and (B) at least one monofilament selected from a polyamide monofilament and a polyester monofilament.

15. At least the weft on the running surface of the weft multiple woven fabric in which the wefts are arranged in upper and lower multilayers: (A) a. The elongation is 6% or more for a load change of 1.25 g / d to 1.75 g / d. When immersed, heat-shrinkable polyamide monofilament having a heat shrinkage of 7% or more and b. Plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, and the elongation at this yield point is 1 to At least one extensible heat-shrinkable monofilament selected from extensible heat-shrinkable polyester monofilaments having a heat shrinkage of 7% or more when immersed in boiling water, and (B) a normal polyamide monofilament And an at least one monofilament selected from polyester monofilaments.

16. At least 1.25 g / d when a load is applied at a speed of 2 mm / min to at least the weft on the running surface of a weft multi-layer fabric in which wefts are arranged in upper and lower layers.
An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of ~ 1.75 g / d and a heat shrinkage of 7% or more when immersed in boiling water, and b. 0.5g / d to 2.5g / when added at min speed
Plastic deformation occurs in the load range of d, the elongation at this yield point is 1 to 10%, and the heat shrinkage rate when immersed in boiling water is 7% or more. An endless weft multiplex papermaking woven fabric comprising at least one extensible heat-shrinkable monofilament and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments. "
It is.

There are various factors for exhibiting the above-mentioned various properties in the papermaking fabric, and an important factor among them is a filament constituting the fabric. Although the influence of the filament material itself is great, the physical performance added by the treatment of the filament also has a great effect. As a filament constituting a papermaking fabric, a synthetic resin monofilament is considered to be preferable in terms of abrasion resistance and rigidity.
Conventionally used synthetic resin monofilament warp yarns can be bent by the weaving force during weaving, but only elastically deform and do not plastically deform, and immediately return to a straight line when the applied force is removed. There is.

The stretchable heat-shrinkable polyester monofilament and the stretchable heat-shrinkable polyamide monofilament used in the present invention have completely different properties from such conventionally used monofilaments. That is, the stretchable heat-shrinkable polyester monofilament for papermaking fabric used in the present invention is plastically deformed in a load range of 0.5 g / d to 2.5 g / d, and the elongation at the yield point is 1 to 10%. It is a special monofilament having a heat shrinkage of 7% or more when immersed in boiling water. Here, g / d represents a load applied per denier.

Further, the extensible heat-shrinkable polyamide monofilament for papermaking fabric used in the present invention is a very special filament having a large elongation and a large heat shrinkage without plastic deformation. That is, 1.25 g per denier
Elongation is 6% or more for a load change of ~ 1.75g, and the heat shrinkage when immersed in boiling water is 7% or more. Monofilament. The special heat-shrinkable polyester monofilament and heat-shrinkable polyamide monofilament of the present invention exhibit excellent woven fabric posture stability and surface smoothing effect. In addition, the papermaking fabric of the present invention uses the special stretchable heat-shrinkable polyester monofilament and the stretchable heat-shrinkable polyamide monofilament described above to improve the structure of the fabric, so that the papermaking surface has good papermaking properties. In addition, the water-based property and the wire mark property are greatly improved, and the paper quality of the paper to be formed is also improved.

As will be described in detail later, as described above, even if a thick yarn is used as the weft, the abrasion resistance volume does not immediately increase. Regarding the abrasion resistance volume, the shape of the crimp of the weft projecting to the running side of the papermaking fabric becomes a problem. If the weft has a sufficiently bent structure, the crimp of the weft is rectangular in cross section, that is, three-dimensionally cylindrical, and the effective wear-resistant volume is maximized.

Further, since the papermaking fabric is subjected to a large tension in the warp direction during use, it is effective that the warp does not bend even if the tension is applied, and that the warp does not stretch. Since the woven fabric is formed by intersecting the warp and the weft, it is important in the papermaking woven fabric that the warp is not bent, that is, a structure in which the weft is relatively sufficiently bent.

The stability of the posture of the papermaking woven fabric must endure not only the tension in the warp direction but also the load from any direction such as the weft direction and the vertical direction. A woven fabric is essentially formed by intersecting a warp and a weft and interweaving each other in a structure. When the two yarns are fixed in a sufficiently crossed state, the stability of the whole posture is remarkably improved. That is, if the warp and the weft can be fixed and integrated in a state where they completely intersect by sufficient bending of the weft, the fabric can exhibit excellent posture stability as a molded article for maintaining the posture.

By the way, such fabrics are not known at all until now. That is why ordinary woven fabrics are required to have the characteristics of woven fabric, such as suppleness, texture, and softness, and for that, stretch and softness are required.
Posture stability was necessary, but it was rather avoided if the posture stability was too strong due to lack of suppleness, feeling, and feel. As described above, papermaking fabrics belong to a special technical field in which characteristics completely different from ordinary fabrics are required. Therefore, there is no papermaking fabric that satisfies the above-mentioned requirements, and there is no filament that constitutes such a fabric.

The present inventors have conducted intensive studies to provide a papermaking fabric that has solved the above-mentioned requirements. As a result, such a papermaking fabric cannot be realized by using filaments used for ordinary fabrics. The present inventors have clarified the necessity to carry out the process, and have invented a papermaking woven fabric that exhibits excellent effects by using special stretchable heat-shrinkable polyester monofilaments and stretchable heat-shrinkable polyamide monofilaments.

The polyamide monofilament of the present invention for forming a paper woven fabric in which the weft is sufficiently bent and the whole is integrally fixed, has an elongation of 6% or more with respect to a load change of 1.25 g / d to 1.75 g / d. Yes, it is a stretchable heat-shrinkable polyamide monofilament having a heat shrinkage of 7% or more when immersed in boiling water, and a stretchable heat-shrinkable polyester monofilament has a load of 0.5 g / d to 2.5 g / d. This is a monofilament that undergoes plastic deformation in the range, has an elongation at this yield point of 1 to 10%, and has a heat shrinkage of 7% or more when immersed in boiling water.

Again, these filaments are new, monofilaments that were never known before the present application.

These monofilaments used in the present invention can be produced by adjusting the degree of stretching, the degree of relaxation, and the treatment temperature of the filament to impart the above-described extensibility and heat shrinkability to the filament.

The extensible heat-shrinkable polyamide monofilament having special properties used in the present invention is, for example, a filament extruded from a nozzle by a usual melt spinning method is cooled and solidified in a water bath, and then heated at 50 ° C to 90 ° C in a hot water bath. 3.0-4.0 in
It can be manufactured by stretching at twice the draw ratio and not performing the relaxation heat setting.

Such a special monofilament is, for example, a polyamide monofilament having a draw ratio of 3.0 to 4.0 directly taken out from the second godet roll in the melt spinning of a polyamide, and has an elongation with respect to a load change of 1.25 g / d to 1.75 g / d used in the present invention. Is 6% or more, and the heat shrinkage when immersed in boiling water is 7% or more. "

Ordinary polyamide monofilaments are drawn to a draw ratio of 5 to 6 with a second godet roll, then heat-relaxed and heat-shrinked to obtain products used for fabrics. The filaments taken out of the second godet roll at a draw ratio of 3.0 to 4.0 cannot be used for ordinary applications, so to speak, are unfinished filaments, and are the first filaments taken out by the present inventor and not known filaments. The inventor first took out and tested the filament to obtain a filament having special properties to form an endless net.

In addition, the extensible heat-shrinkable polyester filament having special physical properties used in the present invention is, for example, after cooling and solidifying a filament extruded from a nozzle by a normal melt spinning method in a water bath, at 70 ° C to 100 ° C. 3.0 in a warm water bath
It can be manufactured by stretching to 4.0 times and not performing the relaxation heat setting.

Such a special monofilament is, for example, a polyester monofilament having a draw ratio of 3.0 to 4.0 directly taken out from the second godet roll in melt spinning of polyester, and has an elongation with respect to a load change of 1.25 g / d to 1.75 g / d used in the present invention. Is 6% or more, and the heat shrinkage when immersed in boiling water is 7% or more. "

Ordinary polyester monofilaments are drawn to a draw ratio of 5 to 6 by a second godet roll, and then subjected to relaxation heat setting and heat shrinkage to obtain products used for fabrics. The filaments taken out of the second godet roll at a draw ratio of 3.0 to 4.0 cannot be used for ordinary applications, so to speak, are unfinished filaments, and are the first filaments taken out by the present inventor and not known filaments. The inventor first took out and tested the filament to obtain a filament having special properties to form an endless net.

Compared with the conventional monofilament obtained by this ordinary production method, the monofilament used in the present invention is characterized in that it has a smaller draw ratio and is not set for relaxation heat.

The extensible heat-shrinkable polyester monofilament exhibits a special property of plastic deformation, and deforms only when a specific load is applied. Then, it is bent sufficiently by the weaving force of the loom added to the weft during weaving (it is considered to be the force corresponding to the yield value), intersects with the warp, plastically deforms, and does not return to its original state even when it leaves the loom. It has various functions and effects.

On the other hand, with respect to polyamide monofilaments, ordinary polyamide monofilaments that do not satisfy the above requirements for extensibility and heat shrinkability will gently and continuously deform when a load is applied, and will only deform when a specific load is applied. Does not behave. However, the stretchable heat-shrinkable polyamide monofilament for papermaking fabric of the present invention that satisfies the above-mentioned specific requirements does not undergo plastic deformation, but is sufficiently bent by the weaving force of the loom added to the weft at the time of weaving, and is deformed and warped. Intersects with the loom and does not return to its original state even when it is separated from the loom. Polyamide monofilaments that do not satisfy the above specific stretchability and heat shrinkability requirements are not sufficiently bent by the weaving force of the loom at the time of weaving and are only elastically deformed. I will return.

What is important here is that the extensible heat-shrinkable polyester monofilament and the extensible heat-shrinkable polyamide monofilament used in the present invention, unlike ordinary monofilaments, have the property that they do not return to their original shape even when the load or force is removed. Have. Therefore, the woven fabric using these yarns as the wefts can form a woven fabric in which the wefts are sufficiently bent at the weaving stage, and are extremely excellent in posture stability and surface smoothness.

The stretchable heat-shrinkable polyester monofilament and the stretchable heat-shrinkable polyamide monofilament used in the present invention have a very large heat shrinkage as described above, so that they undergo large heat shrinkage (shrink) in a heat fixing step after weaving,
The weft has a sufficiently bent shape, and the warp is firmly gripped and heat-fixed, so that the posture stability of the fabric is extremely good. Furthermore, since the weft yarn is greatly bent and protruded during weaving and greatly shrinks, the crimp of the weft becomes a rectangular cross section between warps and a three-dimensional cylinder, and the effective abrasion resistance volume becomes very large. The stretchable heat-shrinkable polyester monofilament and the stretchable heat-shrinkable polyamide monofilament have high abrasion resistance when placed on the weft of the running surface of the papermaking fabric, but have a smooth surface when placed on the papermaking surface. The paper quality is improved.

The papermaking fabric of the present invention includes a so-called single-woven fabric in which an extensible heat-shrinkable monofilament weft is arranged in a single layer, and a weft-multi-layered papermaking fabric in which the wefts are arranged in layers on upper and lower wefts. This special extensible heat-shrinkable monofilament can be used alone or in combination with other monofilaments. Other monofilaments to be used in combination include ordinary polyester monofilaments and polyamide monofilaments. These ordinary monofilaments can be used in a range that does not impair the special effects of the extensible heat-shrinkable monofilament of the present invention.

Further, in the papermaking fabric of the present invention, the extensible heat-shrinkable monofilament can be arranged on the warp, or may be arranged on both sides. As used in the present invention, having a specific performance,
The extensible heat-shrinkable polyester monofilament and the extensible heat-shrinkable polyamide monofilament, which have high elongation and extremely high heat shrinkability, are novel filaments that have never been known before the present application. The papermaking woven fabric of the present invention that produces an effect is a novel woven fabric that is not known at all.

Polyamide monofilament used in the present invention is 1.25
The elongation must be at least 6% for a load change of ~ 1.75 g / d and the heat shrinkage when immersed in boiling water must be at least 7%. Polyamide monofilaments that do not satisfy the above conditions are elastically deformed when they leave the loom, return to the original state, do not bend, and cannot form a sufficiently bent woven weft yarn.

Polyester monofilaments having an elongation of 1% or less at the yield point are not plastically deformed by the weaving force during weaving.

In the case of a monofilament having a heat shrinkage of 7% or less,
Even if heat setting is small, good stability of posture cannot be obtained and good crimping is not formed.

By the way, regarding the conventionally known polyamide monofilament of papermaking fabric, the elongation is 5% or less for a load change from 1.25 g / d to 1.75 g / d, and even if the heat shrinkability is large, it is 4.5% in boiling water. Just below. As for the polyester monofilaments, the elongation under a load of 1 g / d is about 2.5%, but has no yield point and the heat shrinkage is only about 0.5 to 2.0% in boiling water.

[Effect] The stretchable heat-shrinkable polyester monofilament, the stretchable heat-shrinkable polyamide monofilament, and the papermaking fabric using the action and features of the present invention will be sequentially described.

The extensible heat-shrinkable polyester monofilaments and the extensible heat-shrinkable polyamide monofilaments used in the present invention have the above-mentioned properties and also have the effect of not shrinking the width of the woven fabric when woven.

That is, ordinary wefts are elastically deformed and bent during weaving. However, the width is kept without returning to the original state because it is held down by the pod, but the weft recovers elasticity immediately after leaving the loom and does not bend, and the width expands theoretically, but in practice, the warp of the woven fabric is strong Since the weft is stretched to bend more than at the time of weaving, the width of the woven fabric is greatly reduced from the width immediately after leaving the loom, and the posture stability is lacking.

By the way, the stretchable heat-shrinkable polyester monofilament and the stretchable heat-shrinkable polyamide monofilament used in the present invention are sufficiently bent, deformed in that state, and do not return to their original state even when the load is removed. Even when the fabric is separated, the width of the fabric remains unchanged during weaving and the posture is stable. This effect is a very preferable effect in a papermaking fabric requiring accurate dimensional accuracy.

Next, the operation and effect of the papermaking fabric in which the extensible heat-shrinkable monofilament is arranged on the weft will be described.

The service life of the papermaking fabric is increased by increasing the abrasion-resistant volume of the weft forming the running surface. This is the same for a single heavy fabric and a weft double fabric. In other words, as described above, the running endless woven fabric is cut when the warp is worn and cut, and the endless woven fabric is cut and its service life is exhausted. Therefore, it is necessary to prevent the warp from being worn. Therefore, the weft is provided with wear resistance.

In order to increase the abrasion resistance volume of the weft forming the running surface, it may be possible to arrange a weft with a large wire diameter on this weft, but this alone has the disadvantages as described above and is also effective. The wear-resistant volume is not large enough. In addition, the longer the length of the crimp formed on the running surface of the weft, that is, the knuckle where the warp and the weft intersect and the weft is bent by the warp, and the longer the length of the weft that projects between the knuckles and the running surface, the greater the abrasion resistance volume Should be large, but in fact, it alone has revealed that the wear-resistant volume does not always increase in the study of the present inventors.

The present inventor has further studied this point and found that there is a large difference between the apparent abrasion resistance volume and the effective abrasion resistance volume of the weft, and that the abrasion resistance effect does not increase even if the apparent abrasion resistance volume is increased. did.

In other words, in an actual woven fabric, there is a portion of the knuckle portion where the warp wefts intersect and where the yarn is sharply bent, and which has no abrasion resistance due to the shape of the crimp, exists in the weft on the running surface.

One of the features of the papermaking fabric of the present invention is that the weft is sufficiently bent by arranging the extensible heat-shrinkable polyester monofilament and the extensible heat-shrinkable polyamide monofilament of special performance on the weft on the running surface. In addition to extending the crimp of the weft, the crimp of the weft is lengthened, and the characteristics of the large heat shrinkage are used to greatly shrink the weft in the heat setting process. In addition, the effective wear volume of the weft is remarkably increased by reducing the portion of the weft which does not carry out the wear resistance action.

Another feature of the present invention is that a special extensible heat-shrinkable monofilament is arranged on the weft so that the weft is bent sufficiently at the knuckle portion where the warp weft intersects, and in that state the weft is deformed and the warp is grasped and heat fixed. As a result, the knuckle portion is fixed, and the posture stability is extremely improved.

Another feature of the present invention is that by arranging a special stretchable heat-shrinkable polyamide monofilament filament on the weft on the running surface, the weft is bent sufficiently at the knuckle part and the weft is deformed in that state to grip the warp, The surface of the running surface of the woven fabric becomes smooth, the contact with the foil of the paper machine becomes uniform, and the dewatering property is improved. Furthermore, the adhesiveness with a guide roll is good and guideability is good. The effect of improving the guide property is an effect common to the endless woven fabric.

Another feature of the present invention is that by arranging the above-mentioned weft on the papermaking surface, the papermaking surface becomes smooth, the paper quality is improved, and the pulp fiber supportability and wire mark characteristics are also improved.

Another important feature of the papermaking fabric of the present invention is the absence of ear curls in the papermaking fabric. In the most commonly used multi-layered papermaking fabrics, the surface of the fabric must be smooth, so the upper weft uses relatively hard yarns, reduces the bending, and crimps to the same height as the warp. I have to. Therefore, the upper layer weft has a large heat shrinkage. On the other hand, the lower-layer weft is formed to have a sufficiently long crimp to increase abrasion resistance, thereby preventing the warp from being exposed to the papermaking surface and preventing abrasion. That is, the heat shrinkage of the lower weft is small.
With such a structure, in the heat fixing step, the upper layer weft has a large heat shrinkage, so that a force contracting in the width direction acts on the upper fabric structure, and the lower side fabric structure tends to expand in the width direction. Due to the force of the action, the ears of the fabric are curled. Therefore, when the stretchable heat-shrinkable monofilament used in the present invention is used for the lower weft, the crimping property is good and the shrinkage is large, so that a force shrinking in the width direction equal to or more than that of the upper layer acts. Does not occur.
When curls occur in the ears, not only does the width shrink, but it becomes difficult to control the running position.

The papermaking fabric of the present invention includes, in addition to the multiple fabrics in which the wefts are arranged in a double or triple manner, a single fabric in which the wefts are in a single layer, but as understood from the above-described features, the wefts run on the papermaking surface. In the case of a weft multiple woven fabric arranged in multiple layers above and below the surface, weft yarns suitable for the configuration of each surface can be arranged on each weft, so the effect of extensible heat-shrinkable monofilament is extremely well exhibited, improving paper quality. The present invention can provide a multi-layer woven fabric for papermaking having extremely excellent abrasion resistance.

As described above, the papermaking fabric of the present invention is woven using the specially large stretchable heat-shrinkable polyester monofilament and the heat-shrinkable polyamide monofilament as the weft, but after weaving, heat-setting finish. By doing so, the weft is firmly fixed and does not expand or deform thereafter.

The increase in abrasion resistance volume and abrasion resistance will be specifically described in the following Examples in comparison with the conventional example.

Example An example of the present invention will be described with reference to the drawings, and then the effect will be described by showing a comparative test.

In each drawing, the warp yarns are Arabic numerals, for example 1, 2,
3, upper wefts are indicated by dashed Arabic numerals such as 1 ', 2' and 3 ', and lower wefts are indicated by double dashed Arabic numerals such as 1 ", 2" and 3 ".
Indicated by For convenience of explanation, the number of extensible heat-shrinkable polyester monofilaments is odd, and the number of extensible heat-shrinkable polyester monofilaments is even. However, both monofilaments may be arranged in the same number or in an integer ratio.

FIG. 1 is a front view showing a portion of a monowoven woven fabric for papermaking in which an extensible heat-shrinkable monofilament of the present invention is arranged on a weft. FIG. 2 is a sectional view showing a section of the woven fabric of FIG. 1 taken along the line II ′. It can be seen that the weft yarn 5 'is woven by the warp yarns 1, 5, 9 and passes under the warp yarns 2, 3, 4, and 6, 7, 8 to form crimps for three warp yarns. Since the weft 5 'is a specific heat-shrinkable heat-shrinkable polyamide monofilament having high elongation and heat shrinkage, the weft 5' is sufficiently bent and deformed during weaving and heat-shrinks more strongly so that the lower surface between the warps 1 and 5 is formed. A crimp that protrudes greatly from the outside is formed, and this crimp has an abrasion resistance effect. Then, it is understood that the weft is bent and fixed sufficiently, that the warp is strongly grasped, and that the warp is not exposed on the surface of the running surface. Due to the elongation effect and the heat shrinkage effect, the weft 5 'is bent almost perpendicularly to both sides of the warp yarns 1, 5, and 9, and the crimp of the weft becomes a rectangular cross section and a three-dimensional cylinder, which is understood from the shape of the vertical cross section. Thus, the abrasion resistant volume is maximized. It can be seen that the lower surface of the crimp is flat and the running surface is smooth. The embodiment of FIG. 3 is a front view showing a portion of a papermaking double woven fabric in which the stretchable heat-shrinkable monofilament of the present invention is arranged on a lower weft. FIG. 4 is a sectional view showing a section of the woven fabric of FIG. 3 taken along the line II-II '. In this embodiment, the lower weft is composed of the stretchable heat-shrinkable polyamide monofilament of the present invention and the stretchable heat-shrinkable polyester monofilament of the present invention, whereas the upper weft is composed of ordinary polyester monofilament. It can be seen that the lower weft 14 "is woven by the warps 1, 9, and 17, and passes under the warps 2 to 8 and 10 to 16 to form crimps for seven warps. Is fully bent during weaving and undergoes plastic deformation, and furthermore undergoes strong heat shrinkage in the heat setting step, so that warp 1
5 and 5 have a shape that protrudes greatly from the lower surface. This crimp has a wear resistance effect.

In this embodiment as well, it is understood that the lower weft is sufficiently bent and fixed similarly to the weft of the embodiment of FIG. 1, and that the warp is strongly grasped and the warp is not exposed on the surface. Due to the elongation effect and the heat shrinkage effect, the weft 14 ″ bends almost vertically on both sides of the warps 1, 9, and 17, and the crimp of the weft has a rectangular vertical cross section and a three-dimensional cylindrical shape. It can be seen that the wear volume is maximized, and that the lower surface of the crimp is flat and the running surface is smoother, while the upper warp 14 'is an ordinary polyester monofilament, so that the crimp has an arc shape and a lower weft. Unlike this, the vertical cross section is not rectangular, the upper surface of the crimp is not flat, and the fabric surface is not smooth.

Moreover, since the upper surface of the crimp is below the warp,
Since the weft tends to sink downward between the warps, the pulp collects in these recesses, and the tendency to form a mat cannot be denied, and although abrasion resistance and posture stability are excellent, wire marks are generated. And in this regard,
It is the same as a conventional woven fabric.

The embodiment of FIG. 5 is a front view showing a part of a papermaking double woven fabric in which the extensible heat-shrinkable monofilament of the present invention is arranged on both upper and lower wefts. FIG. 6 shows the woven fabric of FIG.
It is sectional drawing which shows the cross section cut | disconnected by the I 'line. The woven fabric of this embodiment is a woven fabric having the same weave structure as the woven fabric of FIG. 3, but has a different upper weft, and thus has a different surface structure. In this embodiment, the stretchable heat-shrinkable polyamide monofilament and the stretchable heat-shrinkable polyester monofilament having the specific elongation and large heat shrinkability of the present invention are arranged on both the upper and lower wefts. Lower weft 14 ″
It can be seen that the crimp is woven into the design by the warps 1, 9, and 17 and passes under the warps 2 to 8 and 10 to 16 to form crimps for 7 warps. In this crimp, the lower weft 14 ″ is sufficiently bent and deformed during weaving, and further strongly shrinks in the heat fixing step, so that it protrudes greatly from the lower surface between the warps 1 and 5 and has a rectangular vertical cross section. Has a wear resistance effect.

In this embodiment, as in the embodiment of FIG. 1, the lower layer weft is sufficiently bent and fixed, and it is understood that the warp is firmly gripped and the warp is not exposed on the surface of the running surface. . Due to the elongation effect and the heat shrinkage effect, the weft 14 ″ bends almost vertically on both sides of the warps 1, 9, and 17, and the crimp of the weft has a rectangular vertical cross section and a three-dimensional cylindrical shape. It can be seen that the wear volume is maximized, and that the crimp has a flat lower surface and a smooth running surface, while the upper weft 14 'is woven into the fabric by the warps 2 and 5 and passes over the warps 3 and 4. A crimp that projects through the lower surface of two warps is formed, and similarly, a crimp that projects between the warps 10 and 13 on the lower surface of two warps is formed.
A crimp is formed between the warp yarns 5 and 10 so as to pass over the warp yarns 6, 7, 8, and 9 and protrude greatly from the upper surface of four warp yarns. The upper weft 14 'is also an extensible heat-shrinkable polyamide monofilament of the present invention, so that the crimp has a rectangular cross-sectional shape due to the elongation effect and the heat shrinkage effect similarly to the lower weft, and the upper surface of the crimp becomes flat.

In addition, the upper surface of the crimp is at the same height as the warp because the crimp protrudes greatly between the warps, so that the weft does not sink downward between the warps, and there is a recess between the warps. Since it is not possible, there is no accumulation of pulp and no pulp mat is formed, so that no wire mark is generated.

FIG. 7 is a front view showing a part of a conventionally known papermaking fabric. The filaments used are ordinary polyester monofilaments.

FIG. 8 is a sectional view of the woven fabric of FIG. 7 taken along the line IV-IV '. The weft yarn 5 'is woven with the warp yarns 1, 5, and 9 to form a crimp projecting downward below the warp yarns 2, 3, and 4. The crimp shape is such that the monofilament is different from the monofilament of the present invention. Unlike the crimp of the papermaking woven fabric of the present invention, the warp has a weft woven like the crimp of the papermaking fabric of the present invention, because it is deformed gently because it is only elastically deformed and has a small heat shrinkage. Cannot be formed on both sides substantially perpendicularly to form a crimp having a rectangular vertical section. As understood from the drawings,
The abrasion starts from the arc-shaped protrusion of the crimp, and the wefts on both sides of the warp in which the weft is woven do not perform the abrasion action, and the abrasion resistance volume is much smaller than that of the crimp of the woven fabric of the present invention having a rectangular longitudinal section.

FIG. 9 is a front view showing a part of a conventionally known double woven fabric for papermaking. The filaments used are ordinary polyester monofilaments. FIG. 10 is a sectional view of the woven fabric of FIG. 9 taken along the line VV '. Lower weft
14 "is woven by warps 1, 9, and 17 and passes under warps 2 to 8 and 10 to 16 to form a crimp for seven warps. This crimp has a monofilament shape. Unlike the monofilament of the present invention, since it is only elastically deformed and has a small heat shrinkage, it undergoes gradual deformation to form a crimp that protrudes downward in an arc shape, similar to the conventional example of FIG. It is not possible to form a crimp with a rectangular longitudinal section, as in papermaking fabrics.

As can be understood from the drawing, the abrasion starts from the arc-shaped protrusion of the crimp, and the wefts on both sides of the warp in which the weft is woven do not perform the abrasion action, and are more resistant than the crimp of the woven fabric of the present invention having a rectangular cross-section in a longitudinal section. The wear volume is much smaller.

On the other hand, the upper layer weft 14 'is also a normal polyester monofilament like the lower layer weft 14 ", so unlike the monofilament of the present invention, it is elastically deformed and has a small heat shrinkage. A crimp that protrudes in an arc shape is formed, and a crimp having a rectangular longitudinal section cannot be formed like the crimp of the double woven fabric for papermaking of the present invention. It turns out that it does not become.

In addition, the upper surface of the crimp is lower than the warp, so that the weft sinks downward between the warps and the pulp gathers in this recess to form a pulp mat,
Wire marks occur.

As described above, the present invention has been described as a representative example of the papermaking woven fabric which is the endless woven fabric required to have the strictest performance, and thus the endless woven fabric having the stretchable heat-shrinkable polyamide monofilament of the present invention arranged therein. The woven fabric has a flat surface on both the upper and lower surfaces, and a crimp with an extremely large abrasion resistance volume is formed on the lower surface.The abrasion resistance is greatly improved, and the warp and weft yarns are sufficiently bent and strongly entangled with each other. Since it is fixed, the posture stability is also very good. Next, in order to specifically explain the effect of the present invention, a comparative test with a conventional endless woven fabric is shown.

Comparative Test Example 1 A normal polyester monofilament having a wire diameter of 0.17 mm was used for the warp, and the upper weft was plastically deformed at a load of 1.1 g / d with a wire diameter of 0.17 mm. The polyester monofilament of the present invention having a heat shrinkage of 10% is arranged, and the lower weft has a wire diameter of 0.22 mm.
The polyester monofilament of the present invention, which undergoes plastic deformation under a load of 1.2 g / d, has an elongation at this yield point of 4.0%, and a heat shrinkage in boiling water of 13%, has a wire diameter of 0.22 mm.
The polyamide monofilament (nylon 6) of the present invention having an elongation of 9.3% for a load change from 25 g / d to 1.75 g / d and a heat shrinkage in boiling water of 12.5% is alternately woven. In addition, a fabric having an 8-shaft weft double structure shown in FIGS. 5 and 6 was prepared, and the fabric was heat-fixed.
The sample 1 which is an Example of the present invention and has a yarn density shown in FIG.

 Table 1 shows performance such as yarn density.

On the other hand, using the same warp as the above-mentioned woven fabric, the upper weft is woven by alternately arranging a polyester monofilament ordinary yarn having the same diameter as the upper weft, and a polyester monofilament ordinary yarn and a polyamide (nylon 6) monofilament ordinary yarn having the same diameter as the lower weft. , An 8-shaft weft double-textile fabric was prepared, and this fabric was heat-set to obtain Conventional Example 1. 9 and 10 show the structure and shape of Conventional Example 1, and Table 1 shows the properties such as yarn density. Table 1 shows the test results for the two fabrics.

[Note] 1. Sheet smoothness: Raw paper pulp containing medium paper is made into a paper sheet “equivalent to 7 g / m ² basis weight” using a Tappi Standard Sheet Test Machine, and a smooth sheet is prepared according to a conventional method. The smoothness of the surface of the paper which was in contact with the surface of the fabric was measured with a smoothness meter.

2. Abrasion resistance volume of running surface: Value calculated from the volume of warp and weft from the cross section of the fabric to 50% of the warp cross section on the running surface 3. Ear curl amount: Endless woven fabric, two of them Was stretched at a tension of 12 kg / cm and the height change from the horizontal portion of the fabric to the edge of the fabric when wet with water was measured.

4. Ratio of lifespan Using Nippon Filcon Co., Ltd. registered utility model No. 1350124 abrasion tester Example 2 Use a polyester monofilament ordinary yarn with a wire diameter of 0.20 mm as the warp, a polyester monofilament ordinary yarn with a wire diameter of 0.19 mm as the upper weft, and Load of 0.22mm wire diameter on lower weft
Plastic deformation occurs at 1.2 g / d and the elongation at this yield point is 4.
The polyester monofilament of the present invention, which has a heat shrinkage of 13% in boiling water at 0%, and 1.25 g of a wire diameter of 0.22 mm /
The elongation percentage for a load change of 17.5g / d from / d is 9.3%,
The polyamide monofilament (nylon 6) of the present invention having a heat shrinkage rate of 12.5% in boiling water is alternately arranged and woven to form a woven fabric having an 8-shaft weft double structure shown in FIGS. 3 and 4. The woven fabric was prepared and heat-fixed to obtain a sample 2 having a yarn density shown in Table 2 which is an example of the present invention.

 Table 2 shows performance such as yarn density.

On the other hand, using the same warp and upper weft as the above-mentioned woven fabric, a polyester monofilament normal yarn and a polyamide (nylon 6) monofilament normal yarn having the same yarn diameter are alternately arranged and woven for the lower weft, thereby forming an 8-shaft weft double structure woven fabric. Then, the fabric was heat-set to obtain Conventional Example 2. 9 and 10 show the structure and shape of Conventional Example 2, and Table 2 shows the performance such as yarn density. Table 2 shows the test results for the two fabrics.

[Note] 1. Sheet smoothness: beaten newspaper broke to make a paper sheet “equivalent to 70 g / m ² basis weight” with a raw material tappi standard sheet test machine, and made a smooth sheet according to a conventional method. The smoothness of the surface of the paper which was in contact with the surface of the fabric was measured with a smoothness meter.

2. Abrasion resistance volume of running surface: Value calculated from the volume of warp and weft from the cross section of the fabric to 50% of the warp cross section on the running surface 3. Ear curl amount: Endless woven fabric, two of them Was stretched at a tension of 12 kg / cm and the height change from the horizontal portion of the fabric to the edge of the fabric when wet with water was measured.

4. Life time ratio Abrasion tester manufactured by Nippon Filcon Co., Ltd. (Registered Utility Model No. 1350124) Example 3 Using a polyester monofilament ordinary yarn with a wire diameter of 0.25 mm for the warp, a wire diameter of 0.30 mm for the weft, and a load of 1.7 g / The polyester monofilament of the present invention, which undergoes plastic deformation at d and has an elongation at the yield point of 2.3% and a heat shrinkage in boiling water of 17%, has a wire diameter of 1.25 g / d to 1.75 g / d having a wire diameter of 0.30 mm. A 4-shaft satin woven fabric obtained by alternately arranging and woven with the polyamide monofilament (nylon 6) of the present invention having an elongation of 8.2% against a change in load and a heat shrinkage in boiling water of 14.7%. Then, the woven fabric was heat-set to obtain Sample 3 which is an example of the present invention.

1 and 2 show the structure and shape of Sample 3, and Table 3
Shows the yarn density and the like.

On the other hand, using the same warp as the above-mentioned woven fabric, a polyester monofilament ordinary yarn and a polyamide (nylon 6) monofilament ordinary yarn having the same yarn diameter are alternately arranged and woven for the weft, and a woven fabric having a 4-shaft satin woven structure is formed. Was heat-set to obtain Conventional Example 3. 7 and 8 show the structure and shape of Conventional Example 3, and Table 3 shows performance such as yarn density. The test results for the two fabrics are shown in Table 3.

[Note] 1. Sheet smoothness: beaten cardboard waste paper into raw material,
In touch-pin standard sheet test machine "basis weight 70g / m ²
A "equivalent" paper sheet was prepared, a smooth sheet was prepared according to a conventional method, and the smoothness of the surface of the paper in contact with the fabric surface was measured with a Beck smoother.

2. Abrasion resistance volume of running surface: Value calculated from the volume of warp and weft from the cross section of the fabric to 50% of the warp cross section on the running surface 3. Ear curl amount: Endless woven fabric, two of them Was stretched at a tension of 12 kg / cm and the height change from the horizontal portion of the fabric to the edge of the fabric when wet with water was measured.

4. Life time ratio Abrasion tester (registered utility model No. 1350124) manufactured by Nippon Filcon Co., Ltd. [Effect] As is clear from the above examples, the woven fabric of the present invention has a smoother sheet ( = Smoothness of the woven fabric surface) and excellent runnability without ear curls, and a remarkable increase in the number of service lives due to an increase in the abrasion resistant volume of the running surface.

[Brief description of the drawings]

FIGS. 1, 3, and 5 are front views showing a woven fabric according to an embodiment of the present invention, and FIGS.
FIG. 6 is a sectional view of the woven fabric of FIGS. 3, 3 and 5; 7 and 9 are front views showing a conventional fabric, and FIGS. 8 and 10 are sectional views of the fabric of FIGS. 7 and 9, respectively. 1 to 17 warp 1 'to 17' weft 1 "to 17" lower weft

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI D21F 1/10 D21F 1/10 7/08 7/08 A (56) References JP-A-54-125705 (JP, A) JP-A-52-124906 (JP, A) JP-T-63-502291 (JP, A) Jikken 43-24546 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) D03D 1 / 00-15/00 D21F 1/00 D21F 7/08

Claims (16)

(57) [Claims] 1. An extensibility wherein the elongation of the weft is 6% or more with respect to a load change of A.1.25 g / d to 1.75 g / d, and the heat shrinkage is 7% or more when immersed in boiling water. Heat-shrinkable polyamide monofilament and B. Under the load range of 0.5 g / d to 2.5 g / d, plastic deformation occurs, the elongation at this yield point is 1 to 10%, and the heat shrinkage when immersed in boiling water Endless woven fabric comprising a stretchable heat-shrinkable polyester monofilament having a percentage of 7% or more. 2. When the A. load is applied to the weft at a speed of 2 mm / min, 1.25 g / d to 1.75 g / d
A heat-shrinkable polyamide monofilament having an elongation of 6% or more and a heat shrinkage of 7% or more when immersed in boiling water with respect to the load change, and B. applying a load at a speed of 2 mm / min. Plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, the elongation at this yield point is 1 to 10%, and the thermal shrinkage when immersed in boiling water is 7% or more Endless woven fabric made by combining stretchable heat-shrinkable polyester monofilament 3. The extensibility wherein the elongation of the weft is 6% or more for a load change of A.1.25 g / d to 1.75 g / d, and the heat shrinkage is 7% or more when immersed in boiling water. Heat-shrinkable polyamide monofilament and B. Under the load range of 0.5 g / d to 2.5 g / d, plastic deformation occurs, the elongation at this yield point is 1 to 10%, and the heat shrinkage when immersed in boiling water And an extensible heat-shrinkable polyester monofilament having a percentage of 7% or more. 4. When the A. load is applied to the weft at a speed of 2 mm / min, 1.25 g / d to 1.75 g / d
A heat-shrinkable polyamide monofilament having an elongation of 6% or more and a heat shrinkage of 7% or more when immersed in boiling water with respect to the load change, and B. applying a load at a speed of 2 mm / min. Plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, the elongation at this yield point is 1 to 10%, and the thermal shrinkage when immersed in boiling water is 7% or more An endless papermaking woven fabric in which an extensible heat-shrinkable polyester monofilament is used in combination. 5. An endless weft multi-layer woven fabric in which wefts are arranged in upper and lower multilayers, at least 6% of elongation with respect to a load change of A.1.25 g / d to 1.75 g / d, and immersed in boiling water. When heat-shrinkable, the heat-shrinkable polyamide monofilament having a heat shrinkage ratio of 7% or more and B. plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, and the elongation at the yield point is 1 to 10 g / d. % Or more, and an extensible heat-shrinkable polyester monofilament having a heat shrinkage of 7% or more when immersed in boiling water. 6. An at least 1.25 g / d to 1.75 g / d when a load is applied at a speed of 2 mm / min to at least a weft of an endless weft multiple woven fabric in which wefts are arranged in upper and lower multilayers.
A heat-shrinkable polyamide monofilament having an elongation of 6% or more and a heat shrinkage of 7% or more when immersed in boiling water and a load of B. were applied at a rate of 2 mm / min. When plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, the elongation at this yield point is 1 to 10%, and the heat shrinkage when immersed in boiling water is 7% or more. An endless woven fabric comprising a heat-shrinkable polyester monofilament in combination. 7. The endless weft multi-layer woven fabric in which the wefts are arranged in multiple layers above and below a papermaking surface and a running surface, at least the weft has an elongation of 6% or more with respect to a load change of A.1.25 g / d to 1.75 g / d. A heat-shrinkable polyamide monofilament having a heat shrinkage of 7% or more when immersed in boiling water; and B. plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, and this yield point And an extensible heat-shrinkable polyester monofilament having an elongation of 1 to 10% and a heat shrinkage of 7% or more when immersed in boiling water. 8. An endless weft multi-layered woven fabric in which wefts are arranged in multiple layers above and below a papermaking surface and a running surface. A. A load of 1.25 g / d to 1.75 g / d when a load is applied at a speed of 2 mm / min.
A heat-shrinkable polyamide monofilament having an elongation of 6% or more and a heat shrinkage of 7% or more when immersed in boiling water with respect to a load change of B. Load at a speed of 2 mm / min. When added, plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, the elongation at this yield point is 1 to 10%, and the heat shrinkage when immersed in boiling water is 7% or more. An endless weft multi-layer papermaking woven fabric comprising a combination of a stretchable heat-shrinkable polyester monofilament. 9. An endless weft multi-layer woven fabric in which wefts are arranged in multiple layers above and below a papermaking surface and a running surface, wherein at least the weft on the running surface has an elongation of 6% with respect to a load change of A.1.25 g / d to 1.75 g / d. The heat-shrinkable polyamide monofilament having a heat shrinkage of 7% or more when immersed in boiling water, and B. plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, An endless weft multi-layer paper made by combining with an extensible heat-shrinkable polyester monofilament having an elongation at the yield point of 1 to 10% and a heat shrinkage of 7% or more when immersed in boiling water. For textiles. 10. A load of 1.25 g / d to 1.75 when an A. load is applied at a speed of 2 mm / min to at least a weft on a running surface of an endless weft multi-layer woven fabric in which wefts are arranged in upper and lower multilayers on a papermaking surface and a running surface. g /
e. an extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more and a heat shrinkage of 7% or more when immersed in boiling water with respect to a load change of d, and B. applying a load of 2 mm / min. 0.5g / d to 2.5g / d when added at
Plastic deformation occurs in a load range of 1 to 10%, the elongation at this yield point is 1 to 10%, and the heat shrinkage rate when immersed in boiling water is 7% or more. Endless weft multiplex papermaking fabrics arranged. (11) At least the weft of a weft multi-layer fabric in which wefts are arranged in upper and lower multilayers: (A) a. The elongation is 6% or more with respect to a load change of 1.25 g / d to 1.75 g / d. When immersed, heat-shrinkable polyamide monofilament having a heat shrinkage of 7% or more and b. Plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, and the elongation at this yield point is 1 to At least one extensible heat-shrinkable monofilament selected from extensible heat-shrinkable polyester monofilaments having a heat shrinkage of 7% or more when immersed in boiling water, and (B) a normal polyamide monofilament And at least one monofilament selected from polyester monofilaments. 12. A 1.25 g / d when a load is applied at a speed of 2 mm / min to at least a weft of a weft multi-layer fabric in which wefts are arranged in upper and lower multilayers.
An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of ~ 1.75 g / d and a heat shrinkage of 7% or more when immersed in boiling water; and b. A load of 2 mm / min. 0.5g / d to 2.5g / d when added at the speed of
Plastic deformation occurs in the load range of, the elongation at this yield point is 1 to 10%, and when immersed in boiling water, the heat shrinkage is at least 7% or more selected from extensible heat-shrinkable polyester monofilaments. Endless woven fabric comprising one stretchable heat-shrinkable monofilament and (B) at least one monofilament selected from ordinary polyamide monofilament and polyester monofilament 13. A weft multi-layer fabric in which wefts are arranged in upper and lower multilayers. At least the weft has: (a) a. Elongation of 6% or more with respect to a load change of 1.25 g / d to 1.75 g / d; When immersed, heat-shrinkable polyamide monofilament having a heat shrinkage of 7% or more and b. Plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, and the elongation at this yield point is 1 to At least one extensible heat-shrinkable monofilament selected from extensible heat-shrinkable polyester monofilaments having a heat shrinkage of 7% or more when immersed in boiling water, and (B) a normal polyamide monofilament And an at least one monofilament selected from polyester monofilaments. 14. A 1.25 g / d when a load is applied at a speed of 2 mm / min to at least the weft of a weft multi-layer fabric in which wefts are arranged in upper and lower multilayers.
An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of ~ 1.75 g / d and a heat shrinkage of 7% or more when immersed in boiling water, and b. 0.5g / d to 2.5g / when added at min speed
Plastic deformation occurs in the load range of d, the elongation at this yield point is 1 to 10%, and the heat shrinkage rate when immersed in boiling water is 7% or more. An endless weft multiplex papermaking woven fabric comprising at least one extensible heat-shrinkable monofilament and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments. 15. A weft on a running surface of at least a running surface of a weft multi-layer fabric in which wefts are arranged in upper and lower multilayers: (A) a. Elongation is 6% or more with respect to a load change of 1.25 g / d to 1.75 g / d; Extensible heat-shrinkable polyamide monofilament with a heat shrinkage of 7% or more when immersed in boiling water and b. Plastic deformation occurs in a load range of 0.5 g / d to 2.5 g / d, and elongation at this yield point And at least one extensible heat-shrinkable monofilament selected from extensible heat-shrinkable polyester monofilaments having a heat shrinkage of 7% or more when immersed in boiling water. And an endless weft multiplex papermaking woven fabric, comprising a combination of at least one monofilament selected from a polyamide monofilament and a polyester monofilament. 16. At least 1.25 g / d when a load is applied at a speed of 2 mm / min to at least a running yarn of at least a running surface of a weft multi-layer fabric in which wefts are arranged in upper and lower multilayers.
An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of ~ 1.75 g / d and a heat shrinkage of 7% or more when immersed in boiling water, and b. 0.5g / d to 2.5g / when added at min speed
Plastic deformation occurs in the load range of d, the elongation at this yield point is 1 to 10%, and the heat shrinkage rate when immersed in boiling water is 7% or more. An endless weft multiplex papermaking woven fabric comprising at least one extensible heat-shrinkable monofilament and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments.