JPH02277848A - Endless woven fabric and woven fabric for endless paper making - Google Patents

Abstract

PURPOSE:To obtain woven fabric for paper making having excellent wear resistance, water filtering properties and wire marking properties by using both specific extensible thermally shrinkable polyamide monofilament and extensible thermally shrinkable polyester monofilament as weft. CONSTITUTION:(A) Extensible thermally shrinkable polyamide monofilament having >=6% elongation with change of load from 1.25-1.75g/d and >=7% heat shrinkage in boiling water and (B) extensible thermally shrinkable polyester monofilament producing plastic deformation in a load range of 0.5-2.5g/d, having 1-10% elongation at yield point of the plastic deformation and >=7% heat shrinkage factor in boiling water are used and arranged as weft. Woven fabric will not form middle shrinkage at weaving.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method in which an extensible heat-shrinkable polyamide monofilament for endless textiles and an extensible heat-shrinkable polyester monofilament for endless textiles are arranged in combination at least in the weft. The present invention relates to abrasion-resistant endless articles, particularly abrasion-resistant papermaking fabrics.

[Prior Art] There are many conventionally used blank and edge woven fabrics, such as conveyor belts, dewatering belts, common belts, power transmission belts, dry campuses for papermaking, felt for papermaking, and woven fabrics for papermaking. be. All of these endless woven fabrics are subjected to strong tension in the warp direction during use, so they stretch in the warp direction and contract in the weft direction, which means that the length increases and the width contracts.Also, due to loads in the vertical direction, the length increases and the width decreases. Since it shrinks, it has a problem of poor posture stability. Furthermore, there is the problem that the rollers must have high wear resistance because they come into contact with drive rolls, control rolls, etc. during running and are subject to abrasion. Also, in order to run smoothly, the running surface must be smooth, and in order to place things on top, the top surface must be flat. This problem is common to endless textiles, but it has not yet been satisfactorily solved. The present invention solves these problems.

Among endless textiles, paper-making textiles are most demanding of these properties. In addition to the above-mentioned performance, paper-making fabrics are required to have various performances unique to papermaking, which will be described later. However, if we explain the common problems mentioned above for paper-making fabrics, we will be able to explain almost all the common problems and their solutions for endless fabrics. For ease of understanding, the present invention will be explained below using a papermaking fabric as a representative.

In addition to the above-mentioned problems, paper-making fabrics have more problems than before (
There is a demand for Broadly speaking, they can be divided into (a) problems related to paper quality itself, such as prevention of wire marks and sufficient entanglement of paper fibers, or problems with paper manufacturing yield; (b) improvement of abrasion resistance, extension of the usable life of textiles; (c) The problem of good water resistance, etc. These problems are often related to each other, but roughly speaking, the problem of (b) is a problem that is largely related to the structure of the paper-making surface of the fabric. (b) is closely related to the structure of the running side surface of the fabric, and (c) is a problem that affects the entire fabric.

Many proposals have been made for the conventional solution (a). However, sufficient efforts have not been made to improve the abrasion resistance of paper-making fabrics, which is the problem in (b), and the only way to prevent wear of the warp threads is to make the running side of paper-making fabrics a weft wear type. .

However, in recent years, various conditions have been required such as increasing paper manufacturing speed, increasing the amount of filler used, and increasing the need to manufacture neutral paper, and the abrasion resistance of paper manufacturing fabrics has become a major problem.

Generally speaking, in order to stabilize the posture of the fabric during use and extend its service life, it is desirable for endless fabrics, including papermaking fabrics, to have a wear-resistant effect on the weft yarns on the running surface. This is because when worn, the dimensions of the fabric change, and furthermore, when the warp threads are abraded and cut, the fabric itself is directly cut, so the warp drag type fabric has a short service life.

In order to improve such abrasion resistance, attempts have been made to use abrasion-resistant polyamide yarns for the weft yarns, but these attempts do not change the structure of the fabric itself, but simply use The papermaking fabrics using polyamide yarns had the disadvantage of poor postural stability.

Therefore, in the past, polyester yarns with excellent attributes were used for both warp and weft to construct papermaking fabrics that were difficult to stretch and had excellent posture stability.

In addition, even with such conventionally used papermaking fabrics,
In order to meet the above-mentioned requirements, attempts have been made to use threads with a thicker diameter for the weft on the running side of papermaking fabrics, and although the abrasion resistance has been improved to some extent, the weft and warp are too thick. There are many problems in practical use, such as loss of balance, poor crimp performance, and the generation of wire marks.

Furthermore, as can be understood from the problem (c) above, if the structure of the material Ii changes, the water quality will also be affected, and the problem cannot be solved by a palliative measure such as simply making the weft thicker.

[Issues to be solved by the invention I [i] In view of the problems of the conventional technology as described above, the present inventors have solved the following problems:
When an endless fabric is constructed, special extensible heat-shrinkable polyamide monofilament and extensible heat-shrinkable polyester monofilament, which have particularly excellent abrasion resistance, stability of posture, and surface smoothing effect, are used in combination at least in the weft. By arranging the paper fabrics, we improved the structure of the endless woven papermaking fabric and improved its abrasion resistance, and also improved papermaking performance such as water retention and wire mark resistance, which are problems specific to papermaking fabrics. It is something.

[Means for Solving the Problems] The present invention provides: 1. The weft has A, elongation is 6% or more with respect to a load change of 1.25 g/d to 1.75 g/d, and when immersed in boiling water. A stretchable heat-shrinkable polyamide monofilament with a heat shrinkage rate of 7% or more and B undergo plastic deformation in a load range of 0.5 g/d to 2.5 g/d, and the elongation at this yield point is 1 to 1. 10%, and an extensible heat-shrinkable polyester monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water. 1.25g/ when added at a speed of m
B. An extensible heat-shrinkable polyamide monofilament, which has an elongation of 6% or more with respect to a load change of d to 1.75 g/d, and a heat loss rate of 7% or more when immersed in boiling water; 0 when a load is applied at a speed of 2 am/min
゜A section that undergoes plastic deformation in a load range of 5 g/d to 2.5 g/d, has an elongation of 1 to 10% at its yield point, and has a heat shrinkage rate of 7% or more when immersed in boiling water. Endless fabric 3, which is made by co-arranging heat-shrinkable polyester monofilament, has A in the weft, has an elongation of 6% or more under a load change of 1.25 g/d to 1.75 g/d, and is resistant to boiling water. An extensible heat-shrinkable polyamide monofilament with a heat shrinkage rate of 7% or more when immersed and B, in a load range of 0.5 g/d to 2.5 g/d,
Plastic deformation occurs, and the elongation at the yield point is 1 to 10%.
An endless paper-making fabric comprising a stretchable heat-shrinkable polyester monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water.

4. When A load is applied to the weft at a speed of 2/2, 1.25 g/d~
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 rate of 7% or more when immersed in boiling water; 05g when added at the speed of min
An extensible thermoplastic that causes plastic deformation in a load range of /d to 2.5 g/d, has an elongation of 1 to 10% at its yield point, and has a thermal contraction rate of 7% or more when immersed in boiling water. For endless paper making, made in combination with shrinkable polyester monofilament! tm.

5. At least the weft of an endless paper-making fabric in which the wefts are arranged in upper and lower multi-layers has an elongation of 6% or more under a load change of 1.25 g/d to 1.75 g'/d, and is resistant to boiling water. An extensible heat-shrinkable polyamide monofilament with a heat shrinkage rate of 7% or more when immersed in B, undergoes plastic deformation in a load range of 0.5 g/d to 2.5 g/d, and elongation at this yield point. is 1 to 10%,
An endless woven fabric comprising extensible heat-shrinkable polyester monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water.

6. When the load is not applied to at least the wefts of an endless weft multilayer fabric in which the wefts are arranged in upper and lower layers at a speed of 2/yu, 1.25 g/d ~
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 rate of 7% or more when immersed in boiling water, B, and a load of 2+n+/min. When added at a speed of 0゜5
Extensibility that causes plastic deformation in the load range of g/d to 2.5 g/d, has an elongation of 1 to 10% at this yield point, and has a thermal shrinkage rate of 7% or more when immersed in boiling water. Endless fabric made of heat-shrinkable polyester monofilament.

7. A, 1.25 g/d in at least the wefts of an endless weft multilayer fabric in which the wefts are arranged in multiple layers above and below the paper-making surface and the running surface.
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 rate of 7% or more when immersed in boiling water, B, 0.5 g Plastic deformation occurs in the load range of /d to 2.5 g/d, and the deformation at this yield point is 1 to 10%,
An endless weft-multiplex paper-making article, which is formed by co-arranging an extensible heat-shrinkable polyester monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water.

8. A load of 2 /
1.25g/d to 1.75 when added at a rate of aatr
An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of g/d and a heat shrinkage rate of 7% or more when immersed in boiling water; B, a load of 2 rm/d; When applied at a speed of m L n, plastic deformation occurs in the load range of O85g7d to 2.5g/d, the deformation at this yield point is 1 to 10%, and the thermal shrinkage rate when immersed in boiling water. 1. An endless weft-multiplex papermaking fabric, which is made of an extensible heat-shrinkable polyester monofilament having a polyester fiber of 7% or more.

9. An endless weft multilayer fabric in which the wefts are arranged in multiple layers above and below the paper-making surface and the running surface. and has a heat shrinkage rate of 7% or more when immersed in boiling water, an extensible heat-shrinkable polyamide monofilament having a heat shrinkage rate of 7% or more, and B, 0.5g/d to 2.5g/d. Plastic deformation occurs in the load range of d, and the elongation at this yield point is 1 to 10%,
1. An endless weft-multiplex papermaking fabric, comprising an extensible heat-shrinkable polyester monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water.

10. When a load A is applied to the wefts at least on the running surface of an endless weft multilayer fabric in which the wefts are arranged in multiple layers above and below the paper-making surface and the running surface, 1°25 is applied at a speed of 2 cities/min.
An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of g/d to 1.75 g/d and a heat shrinkage rate of 7% or more when immersed in boiling water; When a load is applied at a rate of 2 mm/min, plastic deformation occurs in the load range of 0.5 g/d to 2.5 g/d, and the elongation at the yield point is 1 to 10%. An S product for endless weft-multiplex papermaking, which is formed by co-arranging an extensible heat-shrinkable polyester monofilament having a heat shrinkage rate of 7% or more when immersed.

11. At least the wefts of a weft multilayer fabric in which the wefts are arranged in upper and lower layers, (A) have an elongation of 6% or more under a load change of 1.25 g/d to 1.75 g/d, and are immersed in boiling water. extensible heat-shrinkable polyamide monofilament having a heat shrinkage rate of 7% or more when
An extensible heat-shrinkable polyester that undergoes plastic deformation in a load range of 2.5 g/d, has an elongation of 1 to 10% at its yield point, and has a heat shrinkage rate of 7% or more when immersed in boiling water. An endless woven fabric comprising at least one extensible heat-shrinkable monofilament selected from monofilaments and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments.

12. Apply a load of 2 can/min to at least the wefts of a weft multilayer fabric in which the wefts are arranged in upper and lower layers.
Long-length heat treatment with elongation of 6% or more for a load change of 1.25g/d to 1.75g/d when applied at a rate of , and a thermal contraction rate of 7% or more when immersed in boiling water. B with shrinkable polyamide monofilament, load 2 cities/m
0.5g/d to 2.5g/d when added at a rate of in
Selected from extensible heat-shrinkable polyester monofilaments that undergo plastic deformation in a load range of d, have an elongation of 1 to 10% at this yield point, and have a thermal acid a rate of 7% or more when immersed in boiling water. The endless i! It thing 13, I
(A) a, 1.25 g/d to 1.75 g/
An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of d and a heat shrinkage rate of 7% or more when immersed in boiling water, and b, 0.5
Extensibility that causes plastic deformation in the load range of g/d to 2.5 g/d, has an elongation of 1 to 10% at this yield point, and has a thermal shrinkage rate of 7% or more when immersed in boiling water. An endless weft-multiplex paper produced by co-arranging at least one extensible heat-shrinkable monofilament selected from heat-shrinkable polyester monofilaments and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments. Textile for use.

14. When a load is applied at a speed of 2m/m1n to at least the wefts of a weft-multiplexed fabric in which the wefts are arranged in upper and lower layers, the load changes from 1.25g/d to 1.75g/d. The elongation is 6% or more, and when immersed in boiling water,
extensible heat-shrinkable polyamide monofilament with a heat shrinkage rate of 7% or more, and a load of 2 cm/m i
When applied at a speed of n, plastic deformation occurs in the load range of 0.5 g/d to 2.5 g/d, and the elongation at this yield point is 1
at least one extensible heat-shrinkable polyester monofilament selected from extensible heat-shrinkable polyester monofilaments having a heat shrinkage rate of 7% or more when immersed in boiling water; and (B) ordinary polyamide. An endless weft-multiplex papermaking fabric comprising monofilaments and at least one monofilament selected from polyester monofilaments.

15. (A) a, 1.25 g/d to 1.75 g/d to the weft yarns at least on the running surface of a weft multilayer fabric in which the weft yarns 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 and a heat shrinkage rate of 7% or more when immersed in boiling water, and b, 0.5 g/d.
Extensible heat shrinkable material that causes plastic deformation in a load range of ~2.5 g/d, has an elongation of 1 to 10% at this yield point, and has a heat shrinkage rate of 7% or more when immersed in boiling water. An endless weft-multiplex papermaking fabric comprising (B) at least one extensible heat-shrinkable monofilament selected from polyester monofilaments and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments.

16. A load of 1.25 g/d to 1.75 g/d when a load is applied at a speed of 2 fi/min to the weft threads at least on the running surface of a weft multilayer fabric in which the weft threads are arranged in upper and lower multilayers. An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more and a heat shrinkage rate of 7% or more when immersed in boiling water, and (b) when a load is applied at a rate of 2rur/min. Plastic deformation occurs in the load range of 0.5 g/d to 2.5 g/d, and the elongation at this yield point is 1 to 1.
0%, and the heat shrinkage rate is 7 when immersed in boiling water.
% or more of extensible heat-shrinkable polyester monofilaments and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments. Endless weft-multiplex papermaking fabric,
It is.

There are various factors that make paper-making fabrics exhibit the above-mentioned properties, and among them, the most important factor is the filaments that make up the fabric. Although the filament material itself has a large effect, the physical performance added by filament processing also has a large effect. Synthetic resin monofilaments are said to be preferable as the filaments constituting the paper-making fabric from the viewpoint of abrasion resistance and boron properties. Although the synthetic resin monofilament warp and warp yarns conventionally used are bent by the weaving force during weaving, they only undergo elastic deformation and not plastic deformation, and as soon as the applied force is removed, they return to their original straight shape. It has the property of returning.

The extensible heat-shrinkable polyester monofilament and the extensible heat-shrinkable polyamide monofilament used in the present invention have properties completely different from such conventionally used monofilaments. That is, the functional extensible heat-shrinkable polyester monofilament for paper making and li materials used in the present invention deforms plastically in a load range of 0.5 g/d to 2.5 g/d, and has an elongation of 1 to 10 at the yield point.
%, and is a special monofilament that has a heat shrinkage rate of 7% or more when immersed in boiling water. Here g/d
represents the load applied per 1 denier.

Further, the extensible heat-shrinkable polyamide monofilament for papermaking fabric used in the present invention is a very special filament that does not undergo plastic deformation but has large elongation and large heat-shrinkability. That is, 1.25 per denier
It has special properties that are completely unknown in the past, such as an elongation of 6% or more when the load changes from 1.75g to 1.75g, and a heat yield rate of 7% or more when immersed in boiling water. This is a new monofilament. The special extensible heat-shrinkable polyester monofilament and extensible heat-shrinkable polyamide monofilament of the present invention exhibit excellent posture stability of the woven fabric and surface smoothing effect. In addition, the papermaking fabric of the present invention uses the above-mentioned special extensible heat-shrinkable polyester monofilament and extensible heat-shrinkable polyamide monofilament to improve the structure of the fabric, so it has good papermaking properties on the papermaking surface. As a result, water resistance and wire mark resistance are greatly improved, and the paper quality of the paper produced is also good.

As I will explain in detail later, as mentioned above, even if thick yarn is used for the weft, the abrasion resistant volume will not increase by itself, and the abrasion resistant volume will be affected by the crimp of the weft that protrudes on the running side of the papermaking fabric. The shape of the is a problem. When the weft has a sufficiently bent structure, the crimp of the weft has a rectangular cross-section, that is, a three-dimensional cylinder, and the effective wear-resistant volume is maximized.

Furthermore, since paper-making fabrics are subjected to large tension in the warp direction during use, it is effective for the warp threads not to be bent to maintain its posture without stretching even under tension.

Since woven fabrics are formed by intersecting warp and weft threads,
In papermaking fabrics, it is important that the warp yarns are not bent, that is, that the weft yarns have a relatively sufficiently bent structure.

To stabilize the posture of papermaking fabrics, it must withstand not only tension in the warp direction, but also loads from any direction, such as the weft direction and the vertical direction.Textile fabrics essentially have warps and wefts that intersect and are woven into the fabric. By fixing the two threads in a sufficiently crossed state, the stability of the overall posture is significantly improved. That is, if the warp and weft yarns can be fixed and integrated in a completely intersecting state by sufficient bending of the weft yarns, the woven fabric can exhibit excellent posture stability similar to that of a molded article.

By the way, until now, such textiles are completely unknown. This is because ordinary textiles are required to have the characteristics of textiles, such as flexibility, texture, and good touch, and for this purpose, stretch and softness are necessary, and although posture stability is necessary, posture is too much. In fact, licks were avoided because they lacked flexibility, texture, and feel when they were too stable. As described above, papermaking fabrics belong to a special technical field that requires properties completely different from those of ordinary fabrics. Therefore, the reality is that there is still no fabric for papermaking that satisfies the above-mentioned requirements, and there is also no filament constituting a loose fabric.

The inventors of the present invention have conducted intensive research to provide a papermaking fabric that satisfies the above-mentioned requirements, and have found that a drastic papermaking fabric cannot be created by using filaments used in ordinary fabrics, and that a special filament is required. They discovered the need to use special extensible heat-shrinkable polyester monofilaments and extensible heat-shrinkable polyamide monofilaments to create a papermaking fabric with a crushed effect.

The special polyamide monofilament of the present invention, which is used to form a paper fabric in which the weft is sufficiently bent and the whole is fixed together, has an elongation of 6% when the load changes from 1.25 g/d to 1°75 g/d. The above is an extensible heat-shrinkable polyamide monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water, and the extensible heat-shrinkable polyester monofilament is 0.5 g/d to 2.5 g /
The monofilament is a monofilament that undergoes plastic deformation in a load range of d, has an elongation of 1 to 10% at its yield point, and has a thermal shrinkage rate of 7% or more when immersed in boiling water.

Again, these filaments are novel monofilaments that were completely unknown before the filing of this application.

These monofilaments used in the present invention can be produced by adjusting the degree of drawing, degree of relaxation, and processing temperature of the filaments to impart the above-mentioned extensibility and heat shrinkability to the filaments.

This extensible heat-shrinkable polyester monofilament is
It exhibits a special property called plastic deformation, and deforms only when a specific load is applied. It is unique in that it is sufficiently bent by the weaving force of the loom (considered to be a force equivalent to the yield value) applied to the weft threads during weaving, crosses the warp threads, undergoes plastic deformation, and does not return to its original state even after being separated from the loom. It has great effects.

On the other hand, with regard to polyamide monofilaments, ordinary polyamide monofilaments that do not meet the extensibility and heat shrinkability requirements described above deform slowly and continuously when a load is applied, and only deform when a specific load is applied. However, the extensible heat-shrinkable polyamide monofilament for papermaking fabrics of the present invention, which satisfies the above-mentioned specific requirements, does not exhibit plastic deformation, but does not exhibit the behavior of being added to the weft during weaving. It has a unique effect in that it is sufficiently bent by force, deforms, intersects with the warp threads, and does not return to its original shape even after being separated from the loom.

Polyamide monofilaments that do not meet the above-mentioned specific extensibility and heat shrinkability requirements will not bend sufficiently under the weaving force of the LA loom during weaving, but will only be elastically deformed and will deform sloppily once removed from the loom. It goes back to normal.

What is important here is that the extensible heat-shrinkable polyester monofilament and long-length heat-shrinkable polyamide monofilament used in the present invention have a characteristic that, when deformed, they do not return to their original state even after the load or force is removed, unlike ordinary monofilaments. has. Therefore, a woven fabric using these yarns as weft yarns can be formed into a woven fabric in which the weft yarns are sufficiently bent during the weaving stage and have extremely excellent posture stability and surface smoothness.

As mentioned above, the extensible heat-shrinkable polyester monofilament and the extensible heat-shrinkable polyamide monofilament used in the present invention have extremely high heat shrinkability, so they undergo a large heat shrinkage in the heat setting process after weaving, and the weft has a sufficiently bent shape, and the warp is strongly gripped and heat-set, resulting in extremely good posture stability of the fabric. Furthermore, since the weft yarns are sufficiently bent and protruded during weaving, they undergo a large heat shrinkage, so the crimp of the weft yarns becomes rectangular in longitudinal section and cylindrical in three dimensions between the warp yarns, resulting in a very large effective wear-resistant volume. These unique extensible heat-shrinkable polyester monofilaments and extensible heat-shrinkable polyamide monofilaments have high abrasion resistance when placed in the weft of the running surface of papermaking fabrics, but when placed on the papermaking side, the surface becomes smooth. The paper quality is improved.

The papermaking fabric of the present invention includes so-called single-filament fabrics in which extensible heat-shrinkable monofilament wefts are arranged in a single layer, as well as weft-multiple papermaking finches in which these wefts are arranged in multiple layers in upper and lower wefts. This special extensible heat-shrinkable monofilament can be used alone or in combination with other monofilaments. Other monofilaments used in combination include ordinary polyester monofilaments and polyamide monofilaments. These ordinary monofilaments can be used as long as the special effects of the extensible heat-shrinkable monofilament of the present invention are not impaired.

In addition, in the papermaking fabric of the present invention, the extensible heat-shrinkable monofilament may be placed in the warp or both the warp and warp. Stretchable heat-shrinkable polyester monofilament and stretchable heat-shrinkable polyamide monofilament, both of which have extremely high heat-shrinkability, are new filaments that were completely unknown before the filing of this application. The papermaking fabric of the invention is also a completely unknown new fabric.

The polyamide monofilament used in the present invention is 1.2
Polyamide monofilaments that do not meet the above conditions must have a warpage of 6% or more when subjected to a load change of 5 to 1.75 g/d, and a heat shrinkage rate of 7% or more when not immersed in boiling water. , m, it elastically deforms and returns to its original state, resulting in no bending, and a fabric with sufficiently curved weft yarns cannot be formed.

Further, polyester monofilament having an elongation of 1% or less at the yield point does not undergo plastic deformation due to the weaving force during weaving.

In addition, a monofilament having a heat shrinkage rate of 7% or less has a small heat shrinkability and cannot obtain good posture stability even when heat-fixed, and does not form a good phosphorus 1.

By the way, if we look at the polyamide monofilament of conventionally known papermaking fabrics, it is 1.25 g/d to 1.7 g/d.
The elongation is less than 5% with respect to a load change of 5 g/d, and the heat shrinkage is only less than 4.5% in boiling water, even if the heat shrinkage is large. The elongation is about 2.5%, but the yield point is low (heat shrinkage is 0.5 to 2.5% in boiling water).
It is only about 0%.

[Function] An extensible heat-shrinkable polyester monofilament, an extensible heat-shrinkable polyamide monofilament, and a papermaking fabric using the functions and features of the present invention will be explained in order.

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

In other words, normal weft yarns are elastically deformed and bent during weaving. However, since the weft is held down by the reed, it does not return to its original width and maintains its width, but immediately after leaving the loom, the weft recovers its elasticity and no longer bends, and theoretically the width increases, but in reality, the warp of the fabric is strong. Because the weft is stretched, the weft bends more than during weaving, so the width of the fabric shrinks significantly from the width immediately after leaving the loom, resulting in a lack of posture stability.

By the way, the extensible heat-shrinkable polyester monofilament and extensible heat-shrinkable polyamide monofilament used in the present invention are sufficiently bent by the force applied during weaving, deformed in that state, and do not return to their original shape even after the load is removed. Even when separated, the width of the fabric remains as it was when it was woven, and its posture remains stable. This effect is extremely desirable in papermaking ams that require precise dimensional accuracy.

Next, place this extensible heat-shrinkable monofilament on the weft! The effects of the papermaking fabric will be explained below.

The use characteristics of papermaking fabrics are increased by increasing the wear-resistant volume of the weft yarns forming the running surface.

This is the same for both single-stitched and double-wefted fabrics. In other words, in a running endless fabric, if the warp threads are abraded and broken as described above, the endless fabric will be cut and its useful life will be over, so it is necessary to prevent the warp threads from being subjected to abrasion. Therefore, the weft is made to have wear resistance.

In order to increase the abrasion volume of the weft threads that form the running surface, it may be possible to arrange weft threads with a larger wire diameter in the weft threads, but this alone has drawbacks as mentioned above, and is not effective. The wear-resistant volume is not large enough, and the length of the crimp formed on the running surface of the weft, that is, the length of the crimp formed on the running surface of the weft, that is, the knuckle where the warp and weft intersect and the weft is bent by the warp, and the knuckle protrudes from the running surface between the knuckles. The longer the weft length is, the larger the wear-resistant volume should be, but in reality, the inventor's research has revealed that the wear-resistant volume does not necessarily become thicker.

As a result of further research on this point, the present inventor found that there is a large difference between the apparent 1iil wear volume of the weft yarn and the effective wear resistance volume, and that increasing the apparent wear resistance volume does not increase the wear resistance effect. did.

In other words, in actual textiles, at the knuckle where the warp and weft intersect and the yarn is sharply bent, there is a portion of the weft on the running surface that does not have an anti-wear effect due to the shape of the crimp.

One of the features of the papermaking fabric of the present invention is that by arranging extensible heat-shrinkable polyester monofilaments and extensible heat-shrinkable polyamide monofilaments with special performance in the wefts on the running surface, the wefts are sufficiently bent and the warp By making the crimp of the weft protrude between the warp yarns and lengthening the weft crimp, the weft yarn is greatly contracted in the heat setting process by taking advantage of its high heat shrinkability, and the shape of the weft crimp formed between the warp yarns is rectangular in longitudinal section.
Three-dimensionally, the comb is made cylindrical to reduce the portion of the weft that does not perform the wear-resistant function, and to significantly increase the effective 11rl wear volume.

Another feature of the present invention is that by arranging a special extensible heat-shrinkable monofilament on the weft, the weft is sufficiently bent at the knuckle where the warp and weft intersect, and in that state, the weft deforms and grips the warp and heat-sets it. Because of this, the knuckles are fixed and the posture stability is extremely good.

The feature of the pond of the present invention is that by arranging a special extensible heat-shrinkable polyamide monofilament filament on the weft on the running surface, the weft is sufficiently bent at the knuckle part, and in that state, the weft deforms and grips the warp. The surface of the running surface of the fabric becomes smooth, and contact with the paper machine foil becomes uniform, improving dewatering performance. Furthermore, it has good adhesion to the guide roll and provides good guiding performance. This effect of improving guideability is an effect common to endless fabrics.

Another feature of the present invention is that by arranging the above-mentioned weft yarns on the paper-making surface, the paper-making surface becomes smooth, the paper quality improves, and the support properties of pulp fibers and wire mark properties are also improved.

Another important feature of the papermaking fabric of the present invention is the absence of papermaking fabric selvage curl. In the multi-layered fabric for paper manufacturing, which is currently most commonly used, the surface of the fabric must be smooth, so relatively stiff yarns are used for the weft in the upper layer to minimize bending and the crimp is placed at the same height as the warp. I have to. Therefore, the weft yarns in the upper layer have a high thermal shrinkage rate, while the weft yarns in the lower layer are bent to form a sufficiently long crimp to increase abrasion resistance, thereby preventing exposure of the warp yarns to the paper-making surface and preventing abrasion. In other words, the wefts in the lower layer have a small thermal shrinkage rate, which is a structure like this, so during the heat-setting process, the wefts in the upper layer have a large thermal shrinkage, so a force to shrink in the width direction acts on the fabric structure of the upper layer, causing the lower layer to shrink. A force acting on the fabric structure to stretch it in the width direction causes curls to occur at the edges of the fabric. Therefore, when the extensible heat-shrinkable monofilament used in the present invention is used for the weft of the lower layer, it has good crimpability and large shrinkage, so it exerts a force that shrinks in the middle direction as much as or more than that of the upper layer, so the selvage of the fabric is curled. If curling occurs in the ears, not only will the width shrink, but it will also be difficult to control the running position.

The papermaking fabric of the present invention includes not only multilayer fabrics with double or triple wefts, but also single fiber fabrics with single wefts,
As can be understood from the above characteristics, in the case of weft multilayer fabrics in which the weft yarns are arranged in multiple layers above and below the paper-making surface and the running surface, each weft yarn can be arranged with a weft yarn suitable for the configuration of each surface, so it is possible to The effect of the shrinkable monofilament is extremely well exhibited, and it is possible to provide a multi-woven fabric for paper making which has excellent paper quality and excellent abrasion resistance.

As mentioned above, the papermaking fabric of the present invention is woven using extensible heat-shrinkable polyester monofilament and extensible heat-shrinkable polyamide monofilament, which have special high elongation, as weft yarns, and is finished with heat setting after weaving. By doing this, the weft is tightly fixed and will not stretch or deform afterward.

Incidentally, the increase in the wear-resistant volume and the increase in the wear resistance will be specifically explained and explained in the following example section while comparing with the conventional example.

[Example] The present invention will be explained in detail based on the drawings, and then comparative tests will be shown to explain the effects.

In each drawing, the warp threads are represented by Arabic numbers, e.g. 1.2.3,
The upper wefts are indicated by Arabic numerals with a dash, e.g. 1', 2', 3", and the lower wefts are indicated by Arabic numerals with a double dash, e.g. 1", 2", 3". For convenience, the extensible heat-shrinkable polyester monofilaments are shown in odd numbers and the extensible heat-shrinkable polyester monofilaments are shown in even numbers, but both monofilaments may be arranged in the same number or in an integral ratio.

FIG. 1 is a front view showing a portion of a heavy woven fabric for papermaking in which the extensible heat-shrinkable monofilament of the present invention is arranged in the weft. FIG. 2 is a cross-sectional view of the fabric shown in FIG. 1 taken along line 1-1'. It can be seen that the weft thread 5' is interwoven by the warp threads 1.5.9 and passes under the warp threads 2.3.4 and 6.7.8 to form a crimp for three warp threads. The weft yarn 5' is an extensible heat-shrinkable polyamide monofilament with a specific performance, that is, high elongation and heat-shrinkability, so it is sufficiently bent and deformed during weaving, and is even more strongly heat-shrinked to form the lower surface between the warp yarns 1 and 5. A large protruding crimp is formed, and this crimp has an anti-wear effect. It is also understood that the weft threads are sufficiently bent and fixed, gripping the warp threads strongly, and that the warp threads are not exposed to the surface of the running surface. Due to the elongation effect and heat shrinkage effect, the weft yarn 5' bends almost perpendicularly to both sides of the warp yarn 1.5.9, and the crimp of the weft yarn has a rectangular shape in longitudinal section, and is cylindrical in three dimensions, which can be understood from the shape of this rectangular longitudinal section. The wear-resistant volume is maximized. It can be seen that the lower surface of the crimp becomes flat and the running surface becomes smooth. The embodiment shown in FIG. 3 is a front view showing a portion of a double-woven paper fabric in which the long heat-shrinkable monofilament of the present invention is arranged in the lower weft. Fourth
The figure is a sectional view showing a cross section of the fabric shown in FIG. 3 taken along the line I[-II'. In this example, the extensible heat-shrinkable polyamide monofilament of the present invention and the extensible heat-shrinkable polyester monofilament of the present invention are arranged in the lower layer weft, while ordinary polyester monofilaments are arranged in the upper layer weft. Lower layer weft 14″ is warp 1.9.1
7, it is woven and passes under warps 2 to 8 and 10 to 16, forming a crimp for seven warps.

This crimp has a shape in which the lower weft yarns 14'' are sufficiently bent during weaving and undergoes plastic deformation, and are further strongly heat-shrinked in the heat-setting process, so that they protrude significantly to the lower surface between the warp yarns 1 and 5. Provides anti-wear effect.

It can be seen that in this embodiment as well, the lower layer weft is sufficiently bent and fixed in the same manner as the weft in the embodiment shown in FIG. 1, and that it strongly grips the warp and that the warp is not exposed to the surface. Due to elongation effect and heat shrinkage effect, weft 14″ becomes warp 1
．． 9.17 The crimp of the weft yarn bends almost vertically on both sides and has a rectangular longitudinal section, and is cylindrical in three dimensions, and as can be understood from this shape, the wear-resistant volume is maximum. It can be seen that the lower surface of the crimp becomes flat and the running surface becomes smooth. On the other hand, since the upper layer weft 14' is a normal polyester monofilament, its crimp shape is arcuate and unlike the lower layer weft, it does not have a rectangular shape on the new surface, the upper surface of the crimp is not flat, and the surface of the fabric is smooth. do not become.

Moreover, since the upper surface of the crimp is below the warp threads, the weft threads tend to sink downward between the warp threads, and there is an undeniable tendency for the valves to gather in this recess and form a mat, resulting in poor wear resistance. Although it has excellent posture stability, there is a risk of wire marks occurring, and in this respect it is similar to conventional textiles.

The embodiment shown in FIG. 5 is a front view showing a part of a double-layered 1ItI product for paper manufacturing in which the extensible heat-shrinkable monofilament of the present invention is arranged on both lower and lower wefts. Figure 6 shows the fabric of Figure 5 m-
FIG. 3 is a sectional view showing a cross section taken along the m' line. The fabric of this example has the same weave structure as the fabric of Figure 3, but E
This is an example in which the layer yarns are different and therefore the surface pattern is different. In this example, extensible heat-shrinkable polyamide monofilament and extensible heat-shrinkable polyester monofilament having a specific elongation and high heat-shrinkability according to the present invention are arranged in both wefts of the upper layer and the lower layer.

It can be seen that the lower layer weft 14'' is woven into the fabric by the warp 1.9.17 and passes under the warps 2 to 8 and 10 to 16 to form a crimp for 7 warps. The weft yarns 14'' are sufficiently bent and deformed during weaving, and are also strongly heat-shrinked during the heat setting process, so the warp yarns 1 and 5
It protrudes greatly from the bottom between the two and has a rectangular vertical cross section.

This crimp provides an anti-wear effect.

It can be seen that in this example as well, the lower weft yarns are sufficiently bent and fixed as in the example shown in FIG. 1, gripping the warp yarns strongly and that the warp yarns are not exposed on the surface of the running surface. . Due to the warp effect and heat shrinkage effect, the weft thread 14'' bends almost perpendicularly to both sides of the warp thread 1.9.17, and the crimp of the weft thread has a rectangular shape in longitudinal section, and is cylindrical in terms of a standing tree, as can be understood from this shape. The wear-resistant volume is maximized.The lower surface of the crimp becomes flat and the running surface becomes smooth.On the other hand, the upper weft 14' is woven into the structure by the warp threads 2 and 5, and the upper weft thread 14' is woven into the structure by the warp threads 2 and 5. Through this, a crimp is formed that protrudes from the bottom surface of two warp threads, and similarly, warp threads 10 and 13
A crimp is formed that protrudes from the bottom surface of two warp threads between the two warp threads. Further, between the warps 5 and 10, a crimp is formed that passes over the warps 6, 7, 8, and 9 and protrudes greatly on the upper surface of the four warps. Since the upper layer weft 14' is also the extensible heat-shrinkable polyamide monofilament of the present invention, its crimp shape is rectangular in longitudinal section due to the elongation effect and heat shrinkage effect, similar to the lower layer weft, and the upper surface of the crimp is also flat.

Moreover, the upper surface of the crimp is at the same height as the warp because the crimp protrudes greatly between the warp threads, and the weft threads do not sink downward between the warp threads, and there is a recess between the warp threads. Since no valves can be formed, there is no accumulation of bulbs, and no pulp mat formation occurs, so wire marks do not occur.

FIG. 7 is a front view showing a part of a conventionally known papermaking fabric. The filament used is a back-threaded polyester monofilament.

FIG. 8 is a cross-sectional view of the fabric shown in FIG. 7 taken along line IV-IV'. The weft yarn 5' is interwoven with the warp yarn 1.5.9 and passes under the warp yarn 2.3.4 to form a downwardly protruding crimp, but the shape of the crimp is different from that of the monofilament of the present invention. Since it is only elastically deformed (unlikely) and has low heat shrinkage, it deforms slowly and forms a crimp that protrudes downward in an arc shape.
As can be understood from Figure 6, in which the weft yarns bend almost perpendicularly to both sides of the interwoven warp yarns and cannot form a crimp with a rectangular longitudinal section, as in the crimp of the papermaking fabric of the present invention, wear is caused by the wear of the crimp. The weft yarns on both sides of the warp starting from the arc-shaped protrusion and woven with the weft yarns do not perform any abrasion action, and the abrasion-resistant volume is much smaller than that of the crimp having a rectangular longitudinal section in the fabric of the present invention.

FIG. 9 is a front view showing a part of a conventionally known duplex 1IeJ for paper manufacturing. The filament used is a back-threaded polyester monofilament. FIG. 10 is a cross-sectional view of the fabric of FIG. 9 taken along the line v-v''. The lower weft yarns 14'' are woven by the warp yarns 1, 9 and 17 and pass under the warp yarns 2-8 and 10-16. It can be seen that a crimp for seven warp threads is formed. The shape of this crimp differs from the monofilament of the present invention in that the monofilament is only elastically deformed and has low heat shrinkage, so it deforms slowly and forms a crimp that protrudes downward in an arc shape. Similarly to the conventional example shown in the figure, it is not possible to form a rectangular crimp in the aWr plane as in the papermaking fabric of the present invention.

As can be understood from the drawings, abrasion begins at the arc-shaped protrusion of the crimp, and the weft yarns on both sides of the warp into which the weft yarns are woven do not act as abrasive, and are more resistant than the crimps with a rectangular longitudinal section in the fabric of the present invention. The wear volume is much smaller.

On the other hand, like the lower layer weft 14'', the upper layer weft 14' is also a normal polyester monofilament, and unlike the monofilament of the present invention, it is only elastically deformed and has low heat shrinkage, so it deforms gently and stretches upward. It forms a protruding crimp in an arc shape, and cannot form a crimp with a rectangular vertical cross section like the crimp of the double-woven fabric for papermaking of the present invention.The upper surface of the crimp is not flat;
It can be seen that the surface of the fabric is not smooth either.

Furthermore, the upper surface of the crimp is below the warp yarns, so the weft yarns are sunken downward between the warp yarns, and the valves gather in this recess to form a pulp mat, resulting in wire marks.

As described above, the present invention has been explained using a papermaking fabric, which is an endless fabric that requires the most severe performance, as a representative example. The 1A product has flat surfaces on both the top and bottom surfaces, and a crimp with an extremely large wear-resistant volume on the bottom surface, which greatly improves wear resistance, and the warp and weft are sufficiently bent and entwined with each other, making it strong and strong. In order to concretely explain the effect of the zero-order present invention, which has very good posture stability because it is heat-set, a comparative test with a conventional endless woven fabric will be shown.

Comparative Test Example 1 A normal polyester monofilament with a wire diameter of 0.17 rIm was used for the warp, a wire diameter of 0.17 m was used for the upper weft, and a load of 1 was applied.
．． Plastic deformation occurs at 1 g/d, elongation at the yield point is 3.2%, and heat shrinkage in boiling water is 10%.
The polyester monofilament of the present invention is arranged in the upper weft, the wire diameter is 0.22B, plastic deformation occurs at a load of 1.2g/d, the elongation at the yield point is 4.0%, and the heat shrinkage rate in boiling water is is 13%, and the polyester monofilament of the present invention has a wire diameter of 0.22 m and 1.25 g/d.
The elongation rate for a load change of 1.75 g/d is 9.3%.
The 8-shaft weft yarn shown in FIGS. 5 and 6 is woven by alternately arranging the polyamide monofilament (nylon 6) of the present invention, which has a heat shrinkage rate of 12.5% in boiling water. Sample 1, which is an example of the present invention, has a yarn density shown in Table 1 by creating a heavy-tissue woven fabric and heat-setting this woven fabric.
I got it.

Table 1 shows performance such as yarn density.

On the other hand, using the same warp as the above fabric, polyester monofilament regular yarn with the same diameter as the upper weft, polyester monofilament regular yarn with the same thread diameter and polyamide nylon 6) monofilament regular yarn as the top weft, alternately arranged and woven. , create an 8-shaft weft double weave fabric,
This repaired product was heat-set to obtain Conventional Example 1, as shown in Figures 9 and 1.
Figure 0 shows the texture and shape of Conventional Example 1, Table 1 shows the performance such as thread density, and Table 1 shows the test results for these two fabrics.

Table 1 Sample 1 Conventional example 1 Warp density (pieces/pieces) 155 155 upper weft density (same) 58 58 upper weft density (same) 58 58 sheet smoothness 2 (sec) Running surface wear-resistant volume 2 ( w/;”) 31 16 selvedge curl amount 3 (w) Og Life number ratio 4 16 la 100 [Note] 1. Sheet smoothness: A raw material valve containing medium-quality paper was tested with a tappi standard sheet test machine to One paper sheet corresponding to d was made into a smooth sheet according to a conventional method, and the smoothness of the paper surface that was in contact with the fabric surface was measured using a Beck smooth needle.

2. Running surface abrasion resistant volume = 1a The value calculated by calculating the volume of warp and weft from the cross section of the object until the warp cross section on the running surface side becomes 50% 3. Ear curl mini The fabric was stretched on a roll with a tension of 12 kg/Cl, and the change in height from the horizontal part of the fabric to the edge of the fabric when wetted with water was measured.

4. Lifespan ratio Nippon Filcon Co., Ltd. registered utility model No. 1350124
Example 2 using a wear tester No. 2 A regular polyester monofilament yarn with a wire diameter of 0.20 m+ was used for the warp, a regular polyester monofilament yarn with a wire diameter of 0.19 m was used for the upper weft, and a wire diameter of 0.2 was used for the upper weft.
The polyester monofilament of the present invention, which undergoes plastic deformation under a load of 1.2 g/d, has an elongation of 4.0% at its yield point, and has a heat shrinkage rate of 13% in boiling water, and a wire diameter of 0.2 on. 1.75 from 22m L25 g/d
The polyamide monofilament (nylon 6) of the present invention, which has an elongation rate with respect to a load change in g/d of 9.3% and a heat shrinkage rate in boiling water of 12.5%, is alternately arranged and woven. A woven fabric having an 8-shaft weft dual structure shown in FIGS. 3 and 4 was prepared, and this woven fabric was heat-set to obtain Sample 2, which is an example of the present invention, and has a yarn density shown in Table 2.

Table 2 shows performance such as yarn density.

On the other hand, the same warp and upper weft as the above-mentioned fabric were used, and polyester monofilament normal yarn and polyamide (nylon 6) monofilament normal yarn with the same diameter were alternately arranged in the upper weft to weave, and the fabric had an 8-shaft weft double #f1m fabric. was prepared, and this repair was heat-set to obtain Conventional Example 2. FIG. 9 and FIG. 10 show Mm and shape of conventional example 2, and Table 2
Table 2 shows the test results for these two fabrics.

(Leaving space below) Table 2 Warp density (cotton/millet') Upper weft density (same) Upper weft density (same) Conventional sample sheet smoothness (sec) Running surface wear-resistant volume 2 (-/F12) Amount of edge curl 3 (mi) OL2 Life number ratio 4 182 100 [Note] 1. Sheet smoothness: Beat the waste newspaper and test it with a standard sheet test machine using a raw material tarter of 70 g/r.
A paper sheet corresponding to n' was made into a smooth sheet according to a conventional method, and the smoothness of the paper surface that was in contact with the fabric surface was measured using a Beck smooth needle.

2. Running surface wear-resistant volume: Value calculated from the volume of the warp and weft from the cross section of the textile until the warp cross section on the running surface side becomes 50%.3. Edge curl amount: The woven fabric is made into an endless shape, and this is The book was stretched on a roll with a tension of 121 qr/■, and the change in height from the horizontal part of the fabric to the edge of the fabric when wet with water was measured.

4. Life cycle ratio Example 3 based on wear test manufactured by Nippon Filcon Co., Ltd. [11 (Registered Utility Model No. 1350124)] Polyester monofilament normal yarn with a wire diameter of 0.25 on was used for the warp, and a wire diameter of 0.30 mm was used for the weft. 111
The polyester monofilament of the present invention undergoes plastic deformation at 7 g/d, has an elongation of 2.3% at its yield point, and has a heat shrinkage rate of 17% in boiling water, and a wire diameter of 0.3
The polyamide monofilament of the present invention (nylon 6) are alternately arranged and woven to create a fabric with a four-shaft satin weave structure, and this fabric is heat-set to obtain Sample 3, which is an example of the present invention.

FIGS. 1 and 2 show the structure and shape of Sample 3, and Table 3 shows the thread density, etc.

On the other hand, a 4-shaft satin fabric was created by using the same warp as the above-mentioned fabric and alternately arranging regular polyester monofilament yarn and regular polyamide (nylon 6) monofilament yarn with the same diameter in the weft, and creating a 4-shaft satin fabric. !
! ! Conventional Example 3 was obtained by heat-setting J. FIGS. 7 and 8 show the structure and shape of Conventional Example 3, and Table 3 shows performance such as thread density.

The test results for these two fabrics are shown in Table 3.

Table 3 Sample 3 Conventional example 3 Warp density (thread/thread) Weft density (same) Sheet smoothness (seconds) Running surface wear-resistant volume? (w/head 2) Edge curl amount 3 (round) 05 Lifespan Numerical ratio 4 127 100 [Note] 1. Sheet smoothness: Used as a raw material by beating cardboard waste paper and using Tara and a standard sheet test machine to obtain a sheet with a basis weight of 70
A paper sheet equivalent to GLTD was extracted, a smooth sheet was prepared according to a conventional method, and the smoothness of the paper surface that was in contact with the fabric surface was measured using a Beck smoothness meter.

2. Running surface abrasion resistant volume: Value calculated from the volume of the warp and weft from the cross section of the fabric until the warp cross section on the running surface side becomes 50%. 3. Amount of edge curl: The fabric is made into an endless shape, and two strands of this are The fabric was stretched on a roll with a tension of 12 kg/an, and the change in height from the horizontal part of the fabric to the edge of the fabric when wetted with water was measured.

4. Lifespan ratio wear test made by Nippon Filcon Co., Ltd.! (Registered Utility Model No. 1350124) [Effect 1] As is clear from the above examples, the fabric of the present invention runs with less sheet smoothness (=smoothness of the fabric surface) and curling of the edges compared to the conventional example. It was observed that the service life was significantly increased due to the excellent wear resistance and the increase in the wear-resistant volume of the running surface.

[Brief explanation of drawings]

FIGS. 1, 3, and 5 are front views showing fabrics according to embodiments of the present invention, and FIGS. 2, 4, and 6 are respectively
5 is a cross-sectional view of the fabric of FIGS. 3 and 5; FIG. Figures 7 and 9 are front views showing conventional textiles, and Figures 8 and 10 are front views of conventional textiles.
are sectional views of the m-pieces in FIGS. 7 and 9, respectively. 1 to 17...Warp 1' to 17'...Weft 1'' to 17''...Lower weft Figure 1 Figure 2 Figure 5 Figure 6 Figure 3cE1 40th 7th Figure 8

Claims (1)

[Claims] 1. The weft has A, elongation is 6% or more when the load changes from 1.25 g/d to 1.75 g/d, and the heat shrinkage rate is 7% when immersed in boiling water. The above extensible heat-shrinkable polyamide monofilament B undergoes plastic deformation in a load range of 0.5 g/d to 2.5 g/d, has an elongation of 1 to 10% at its yield point, and is immersed in boiling water. Endless fabric 2, formed by co-arranging extensible heat-shrinkable polyester monofilament with a heat shrinkage rate of 7% or more when immersed, when A is applied to the weft and a load is applied at a speed of 2 mm/min 1 .25
An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of g/d to 1.75 g/d and a heat shrinkage rate of 7% or more when immersed in boiling water; 0.5g when a load is applied at a speed of 2mm/min
An extensible thermoplastic that causes plastic deformation in a load range of /d to 2.5 g/d, has an elongation of 1 to 10% at its yield point, and has a thermal contraction rate of 7% or more when immersed in boiling water. Endless fabric 3, made of a combination of shrinkable polyester monofilament, A in the weft, elongation of 6% or more under a load change of 1.25 g/d to 1.75 g/d, and immersed in boiling water. When B is an extensible heat-shrinkable polyamide monofilament with a heat shrinkage rate of 7% or more, plastic deformation occurs in the load range of 0.5 g/d to 2.5 g/d, and the elongation at the yield point is 1. 10% and an extensible heat-shrinkable polyester monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water. 4. 1.25 when A is applied to the weft at a speed of 2 mm/min.
An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of g/d to 1.75 g/d and a heat shrinkage rate of 7% or more when immersed in boiling water; 0.5g when a load is applied at a speed of 2mm/min
An extensible thermoplastic that causes plastic deformation in a load range of /d to 2.5 g/d, has an elongation of 1 to 10% at its yield point, and has a thermal contraction rate of 7% or more when immersed in boiling water. An endless paper-making fabric made of a shrinkable polyester monofilament. 5. At least the weft of the endless weft multi-layered fabric in which the wefts are arranged in upper and lower layers, A. The elongation is 6% or more under a load change of 1.25 g/d to 1.75 g/d, and the fabric is immersed in boiling water. When the extensible heat-shrinkable polyamide monofilament B has a heat shrinkage rate of 7% or more, plastic deformation occurs in the load range of 0.5 g/d to 2.5 g/d, and the elongation at the yield point is 1 to 1. 10% or more and an extensible heat-shrinkable polyester monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water. 6. A: 1.25 when a load is applied at a speed of 2 mm/min to at least the wefts of an endless weft multilayer fabric in which the wefts are arranged in upper and lower layers.
The elongation is 6% or more when the load changes from g/d to 1.75 g/d, and the heat shrinkage rate is 7% when immersed in boiling water.
The above extensible heat-shrinkable polyamide monofilament B and a load of 0.5 g when applied at a speed of 2 mm/min
An extensible thermoplastic that causes plastic deformation in a load range of /d to 2.5 g/d, has an elongation of 1 to 10% at its yield point, and has a thermal contraction rate of 7% or more when immersed in boiling water. Endless fabric made of a combination of shrinkable polyester monofilament. 7. A, 1.25 g/d ~ at least in the weft of an endless weft multilayer fabric in which the wefts are arranged in multiple layers above and below the paper-making surface and the running surface.
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 rate of 7% or more when immersed in boiling water, and B, 0.5 g/d. Plastic deformation occurs in a load range of d to 2.5 g/d, and the elongation at this yield point is 1 to 10%,
1. An endless weft-multiplex papermaking fabric, comprising an extensible heat-shrinkable polyester monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water. 8. A load of 2 mm/m on at least the weft of an endless weft multilayer fabric in which wefts are arranged in multiple layers above and below the paper-making surface and the running surface.
1.25 g/d to 1.75 g/d when added at a rate of in.
d, an extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more and a heat shrinkage rate of 7% or more when immersed in boiling water; B. a load rate of 2 mm/min; 0.5g when added with
An extensible thermoplastic that causes plastic deformation in a load range of /d to 2.5 g/d, has an elongation of 1 to 10% at its yield point, and has a thermal contraction rate of 7% or more when immersed in boiling water. An endless weft-multiplex papermaking fabric made of a shrinkable polyester monofilament. 9. An endless weft multilayer fabric in which the wefts are arranged in multiple layers above and below the paper-making surface and the running surface, where the weft at least on the running surface has an elongation of 6% or more under a load change of A, 1.25 g/d to 1.75 g/d. B, an extensible heat-shrinkable polyamide monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water; , the elongation at this yield point is 1 to 10%,
1. An endless weft-multiplex papermaking fabric, comprising an extensible heat-shrinkable polyester monofilament having a heat shrinkage rate of 7% or more when immersed in boiling water. 10. When a load A is applied at a speed of 2 mm/min to the wefts at least on the running surface of an endless weft multilayer fabric in which the wefts are arranged in multiple layers above and below the paper-making surface and the running surface.1.2
Elongation is 6% for load changes of 5g/d to 1.75g/d
The heat shrinkage rate when immersed in boiling water is 7%.
The above extensible heat-shrinkable polyamide monofilament, B, 0.5 when a load is applied at a speed of 2 mm/min.
Plastic deformation occurs in the load range of g/d to 2.5 g/d,
An endless weft multi-layered paper made by co-arranging this extensible heat-shrinkable polyester monofilament having an elongation at the yield point of 1 to 10% and a heat shrinkage rate of 7% or more when immersed in boiling water. Textile for use. 11. At least the wefts of a weft multilayer fabric in which the wefts are arranged in upper and lower multilayers, (A) have an elongation of 6% or more under a load change of 1.25 g/d to 1.75 g/d, and are immersed in boiling water. extensible heat-shrinkable polyamide monofilament with a heat shrinkage rate of 7% or more when
An extensible heat-shrinkable polyester that undergoes plastic deformation in a load range of 2.5 g/d, has an elongation of 1 to 10% at its yield point, and has a heat shrinkage rate of 7% or more when immersed in boiling water. An endless woven fabric comprising at least one extensible heat-shrinkable monofilament selected from monofilaments and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments. 12. When a load is applied at a speed of 2 mm/min to at least the wefts of a weft multilayer fabric in which the wefts are arranged in upper and lower layers, 1
．． An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of 25 g/d to 1.75 g/d and a heat shrinkage rate of 7% or more when immersed in boiling water, b, and a load. 0.5g when added at a speed of 2mm/min
An extensible thermoplastic that causes plastic deformation in a load range of /d to 2.5 g/d, has an elongation of 1 to 10% at its yield point, and has a thermal contraction rate of 7% or more when immersed in boiling water. An endless fabric 13 formed by co-arranging at least one extensible heat-shrinkable monofilament selected from shrinkable polyester monofilaments and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments, the wefts being At least the weft of the weft multilayer fabric arranged in upper and lower layers has an elongation of 6% or more under a load change of 1.25 g/d to 1.75 g/d, and when immersed in boiling water, Extensible heat-shrinkable polyamide monofilament with a heat shrinkage rate of 7% or more and b, 0.5 g/d ~
An extensible heat-shrinkable polyester that undergoes plastic deformation in a load range of 2.5 g/d, has an elongation of 1 to 10% at its yield point, and has a heat shrinkage rate of 7% or more when immersed in boiling water. An endless weft-multiplex papermaking fabric comprising (B) at least one extensible heat-shrinkable monofilament selected from monofilaments and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments. 14. When a load is applied at a speed of 2 mm/min to at least the wefts of a weft multilayer fabric in which the wefts are arranged in upper and lower layers, 1
．． An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of 25 g/d to 1.75 g/d and a heat shrinkage rate of 7% or more when immersed in boiling water, b, and a load. When added at a speed of 2 mm/min, 0.5
Extensibility that causes plastic deformation in the load range of g/d to 2.5 g/d, has an elongation of 1 to 10% at this yield point, and has a thermal shrinkage rate of 7% or more when immersed in boiling water. Endless weft multi-layered paper-making product comprising at least one extensible heat-shrinkable monofilament selected from heat-shrinkable polyester monofilaments and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments. fabric. 15. The weft yarns of a weft multilayer fabric in which the weft yarns are arranged in multiple layers above and below, at least on the running surface, have an elongation of 6% or more under a load change of (A) a, 1.25 g/d to 1.75 g/d, and are boiling. Extensible heat-shrinkable polyamide monofilament having a heat shrinkage rate of 7% or more when immersed in water, b, 0.5 g/d ~
An extensible heat-shrinkable polyester that undergoes plastic deformation in a load range of 2.5 g/d, has an elongation of 1 to 10% at its yield point, and has a heat shrinkage rate of 7% or more when immersed in boiling water. An endless weft-multiplex papermaking fabric comprising (B) at least one extensible heat-shrinkable monofilament selected from monofilaments and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments. 16. When a load is applied at a speed of 2 mm/min to the weft threads at least on the running surface of a weft multilayer fabric in which the weft threads are arranged in upper and lower layers, 1
．． An extensible heat-shrinkable polyamide monofilament having an elongation of 6% or more with respect to a load change of 25 g/d to 1.75 g/d and a heat shrinkage rate of 7% or more when immersed in boiling water, b, and a load. When added at a speed of 2 mm/min, 0.5
Extensibility that causes plastic deformation in the load range of g/d to 2.5 g/d, has an elongation of 1 to 10% at this yield point, and has a thermal shrinkage rate of 7% or more when immersed in boiling water. Endless weft-multiplex paper-making product comprising at least one extensible heat-shrinkable monofilament selected from heat-shrinkable polyester monofilaments and (B) at least one monofilament selected from ordinary polyamide monofilaments and polyester monofilaments. fabric.