JPWO2019138900A1 - Weft multiple woven fabric and its manufacturing method - Google Patents

Abstract

In order to obtain a woven fabric with multiple weft yarns that has better elongation and breaking strength even when composed of only inelastic yarns, the weft yarns that form the outer layer of the woven fabric are woven fabrics in which the weft yarns are arranged in three or more layers. A weft multiple woven fabric is formed in which the warp threads are held only from the outside of the woven fabric and the overlap of the weft threads constituting the woven fabric in the thickness direction is 20 ° to 60 ° with respect to the thickness direction.

Description

The present invention relates to a weft multiplex woven fabric and a method for producing the same. More specifically, the present invention relates to a weft multi-woven fabric having stretchability that can be suitably used for a seat surface of a chair and the like, and a method for producing the same.

Conventionally, as a woven fabric having stretchability, it has been known that an elastic yarn is used for the warp yarn of the woven fabric and the stretchability is exhibited by using the tensile elasticity of the elastic yarn. Then, in this kind of woven fabric design, when it is desired to increase the elongation in the warp yarn direction under a constant load, it is common to reduce the fineness of the elastic yarn. However, at that time, there is a problem that the breaking strength in the warp direction is lowered, and there is a demand for the development of a woven fabric having both excellent elongation and breaking strength.

As a countermeasure, Patent Document 1 states that either the warp or the weft is made of an inelastic yarn having a crimp ratio of 5% or more and 30% or less, and at least a part of the other is 0% or more and 5% or less. A stretch woven fabric made of elastic yarn having a crimp ratio, in which the elongation ratio in the load direction is 5% or more and 30% or less when a load of 340 N / 5 cm is applied so as to be parallel to either the warp yarn or the weft yarn. Stretch woven fabrics characterized by being present have been proposed.

Japanese Patent No. 5758838

However, the stretch woven fabric described in Patent Document 1 is excellent in breaking strength in the warp direction when inelastic yarn is used as the warp and elastic yarn is used as the weft of the woven fabric, but it requires a large elongation such as upholstery. There is a problem that the elongation in the warp direction is insufficient in the application.

In addition, conventional stretchable woven fabrics that use elastic yarns as part of the woven fabrics have problems of low productivity and high price, and use two or more types of yarns (elastic yarns and inelastic yarns). Therefore, there is also a problem in terms of design that uneven dyeing is likely to occur.

In view of such a prior art, a first object of the present invention is to provide a weft multi-layer woven fabric having more excellent elongation and breaking strength. A second object of the present invention is to provide a weft multiplex woven fabric having excellent elongation even when the woven fabric is composed of only inelastic yarns. Further, a third object of the present invention is to provide a manufacturing method capable of suitably manufacturing the weft multiplex woven fabric.

In order to solve the above problems, the present invention has the following configuration.
(1) A woven fabric in which wefts are arranged in three or more layers, and the wefts constituting the outer layer of the woven fabric are held by the warp only from the outside of the woven fabric, and the overlap of the wefts constituting the woven fabric in the thickness direction is the thickness. Weft multiplex fabric that is 20 ° to 60 ° with respect to the direction.
(2) The weft multiplex fabric according to (1) above, wherein the wefts constituting the inner layer of the woven fabric are held by the warp threads from one outer layer side and also by the warp threads from the other outer layer side.
(3) The weft multiplex woven fabric according to (1) or (2) above, wherein the woven fabric crimp rate of the warp yarn is 10% to 60%.
(4) The weft multiplex fabric according to any one of (1) to (3) above, wherein the fineness of the threads constituting the woven fabric is 30 dtex to 2000 dtex.
(5) basis weight is ^{100g / m 2 ~1500g / m 2} , wherein (1) to (4) weft multiple fabric according to any one of.
(6) The weft multiplex woven fabric according to any one of (1) to (5) above, wherein the apparent cover factor of either outer layer or both outer layers is 1700 to 3400.
(7) The weft multiplex fabric according to any one of (1) to (6) above, wherein the warp and weft that make up the woven fabric are made of inelastic yarn.
(8) The weft multiplex woven fabric according to (7) above, wherein the inelastic yarn is polyester.
(9) The weft multiplex woven fabric according to (8) above, wherein the inelastic yarn is polyethylene terephthalate.
(10) The weft multi-woven fabric according to (7) above, wherein the inelastic yarn is a multifilament.
(11) The weft multiplex woven fabric according to any one of (1) to (10) above, wherein the elongation when pulled in the warp direction with a load of 100 N / 50 mm is 5% to 20%.
(12) The method for producing a weft multiplex fabric according to any one of (1) to (11) above.
A woven fabric composed of warp yarns composed of three or more warp yarns and warp yarns A composed of undissolved yarns and warp yarns B composed of melted yarns is melted, and the warp yarns B are removed to obtain a woven fabric composed of weft yarns and warp yarns A. A method for producing a multi-woven weft yarn.
(13) The method for producing a weft multiplex woven fabric according to (12) above, wherein the woven fabric is woven in a state where the tension of the warp B made of melted yarn is larger than that of the warp A made of undissolved yarn.

According to the present invention, it is possible to provide a weft multiplex woven fabric having more excellent elongation and breaking strength than the conventional one. Further, even when the woven fabric is composed of only inelastic yarns, it is possible to provide a weft multiplex woven fabric having excellent elongation. Further, according to the production method of the present invention, the weft multiplex woven fabric can be suitably produced.

FIG. 1 is a schematic view of a woven fabric cross section for showing a definition of a woven fabric crimp ratio of yarn. FIG. 2 is a structural example when the number of laminated weft threads is three. FIG. 3 is a structural example when the number of laminated weft threads is four. FIG. 4 is a schematic view of a woven fabric cross section for showing a definition of a weft arrangement angle.

The weft multiple woven fabric according to the present invention is a woven fabric in which wefts are arranged in three or more layers, and the wefts constituting the outer layer of the woven fabric are held by the warp only from the outside of the woven fabric, and the wefts forming the woven fabric are thickened. The overlap is 20 ° to 60 ° with respect to the thickness direction.

Here, the above-mentioned "outer layer" is a layer for one weft yarn located on the outermost side of the multiple woven fabric, and means both a layer for one weft yarn on the front side of the woven fabric and a layer for one weft yarn on the back side of the woven fabric. To do.

Further, the above-mentioned "the wefts forming the outer layer of the woven fabric are held by the warp threads only from the outside of the woven fabric" means that the wefts forming the outer layer of the woven fabric (for example, the first weft in FIG. 2) as shown in FIGS. 2 and 3. 1a, there is a warp that passes through the outermost side of the woven fabric while being in contact with the first weft 1a in FIG. 3, and the warp constitutes the outer layer of the woven fabric on the same side (first weft 1a in FIG. 2, FIG. 3). It means that it does not circulate inside the first weft 1a).

In the woven fabric of the present invention, with the above configuration, when extended in the warp direction, the weft of the outer layer held by the warp is substantially pressed only from the outside to the inside. Therefore, in a normal plain woven fabric, the wefts are alternately pressed from both the upper and lower sides and are greatly bent. However, in the present invention, the bending of the wefts of the outer layer is smaller than that of the wefts of the inner layer, and the wefts of the outer layer are the inner layers. It follows the weft and is compressed in the length direction of the yarn because it is not bent as much as the weft of the inner layer. Therefore, when the tensile force is removed, it is stretched by the amount of compression in the length direction, which is good. Recoverability is obtained.

Further, in the woven fabric of the present invention, "the overlap of the weft threads in the thickness direction is 20 ° to 60 ° with respect to the thickness direction", which means that the multiple woven fabric is placed in the warp direction as shown in FIG. In the cut cross section, a straight line WD connecting (a) the center of an arbitrary weft and (b) the center of the weft in a layer adjacent to the weft layer and the shortest distance between the centers of the weft and the woven fabric. It means that the angle WA intersecting the straight line TD in the thickness direction is within the range of 20 ° to 60 °. The center of the weft is the center of the minimum radius circle including all the single fibers constituting the weft. Further, in the measurement, each weft layer is measured at five points in the warp direction at intervals of 10 mm, and the average value is used for evaluation.

When the overlap of the wefts is 20 ° or more and 60 ° or less with respect to the thickness direction, when the woven fabric is stretched in the warp direction, the wefts of the inner layer are not sandwiched between the wefts of the upper and lower outer layers, and the force received from the warp is applied. Since it can be uniformly transmitted to the weft, as a result, the entire fabric can be uniformly stretched, and sufficient elongation can be obtained. This angle is preferably 25 ° or more and 60 ° or less.

In the woven fabric of the present invention, it is preferable that the wefts constituting the inner layer of the woven fabric are held by the warp threads from one outer layer side and also by the warp threads from the other outer layer side.

Here, the "inner layer" means a layer other than the outer layer. Further, the above-mentioned "the wefts constituting the inner layer of the woven fabric are held by the warp threads from one outer layer side and also held by the warp threads from the other outer layer side" is in contact with the weft threads forming the inner layer of the woven fabric. It means that there is a warp that passes through one outer layer side of the woven fabric, and there is also a warp that passes through the other outer layer side of the woven fabric while being in contact with the weft.

In addition, each warp thread meanders between the weft thread existing in the inner layer and the weft thread existing in the outer layer in the woven fabric, and the unevenness is repeated when viewed from the surface of the woven fabric. The number of wefts held by the recesses (the number of wefts continuously held by the warp threads in each layer) can be appropriately set according to the desired woven fabric characteristics. However, as the number of threads held is smaller, the number of intersections of the warp and weft threads tends to increase, and the extensibility tends to increase, which is also good in that the stitches of the woven fabric are less likely to be misaligned. It is preferable, and more preferably one as shown in FIGS. 2 to 4.

Further, the form in which the warp threads hold the weft threads can be appropriately set according to the desired woven fabric characteristics. For example, the warp threads on one outer layer side and the warp threads on the other outer layer side are arranged in the surface direction of the woven fabric. It may be in a vertically asymmetrical form with different numbers or different positions of weft. However, if the warp threads on one outer layer side and the warp threads on the other outer layer side are in a vertically symmetrical form holding the same number of weft threads and the same position of weft threads in the surface direction of the woven fabric, the woven fabric is pulled in the warp direction. At that time, the weft threads of the inner layer are bent into the warp threads at intervals close to equality, and local distortion that causes settling is unlikely to occur, which is preferable.

The structure of the weft multiplex fabric according to the present invention is not limited as long as it does not deviate from the claims. The number of weft threads (number of layers) overlapping in the thickness direction may be 3 or more, and as an example, the case of 3 threads is shown in FIG. 2 and the case of 4 threads is shown in FIG.

The warp yarn constituting the weft multiplex woven fabric according to the present invention is preferably an inelastic yarn. By using the warp yarn as an inelastic yarn, the breaking strength in the warp yarn direction can be improved.

Further, the weft yarn may be an elastic yarn or an inelastic yarn. When the weft is an elastic yarn, the elongation in the warp direction can be further increased as compared with the case where the weft is an inelastic yarn. Therefore, the elastic yarn and the inelastic yarn are used properly according to the desired elongation. be able to.

When the warp and weft yarns constituting the woven fabric are composed of only inelastic yarns, the above-mentioned problems of the conventional stretchable woven fabric using elastic yarns as a part of the woven fabric can be solved. .. Specifically, there are advantages such as improvement in productivity, low price, and no uneven dyeing when dyeing because it can be composed of one kind of yarn. In addition, it is possible to design a woven fabric having stretchability by using various inelastic yarns without using elastic yarns having restrictions.

Here, the elastic yarn is a yarn having high extensibility and recoverability such as an elastomer yarn, and a material having excellent extensibility and recoverability such as a thermoplastic elastomer is useful. Specific examples thereof include threads made of polyether elastomers, polysulfide elastomers, polyurethane elastomers and the like.

On the other hand, the non-elastic yarn refers to a yarn other than the elastic yarn. Preferred examples thereof include polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate and copolymers thereof, threads made of polyamide and the like, metal fibers and the like, but polyester is preferable, and polyester is preferable from the viewpoint of strength and dimensional stability. , Polyethylene terephthalate is more preferable. As a result, when the woven fabric is stretched, the yarn is less likely to be plastically deformed, and a woven fabric that can withstand repeated use can be obtained. It is also preferable in that general high-order processing in woven fabrics such as dyeing processing, flame-retardant processing, water-repellent processing, sewing, and heat cutting can be facilitated.

Further, it is preferable that the inelastic yarn is a multifilament. When an inelastic yarn made of a multifilament is used for the warp, the woven crimp rate can be increased, and the elongation in the warp direction can be easily increased. Further, when an inelastic yarn made of a multifilament is used as a weft, the flexibility is improved and a more dense structure can be obtained.

The fineness of the yarn constituting the weft multiplex fabric according to the present invention is preferably 30 dtex to 2000 dtex, and more preferably 50 dtex to 1000 dtex. The content of the yarn having a fineness in the above range is preferably 60% by mass or more, and more preferably 80% by mass or more of the yarn constituting the woven fabric. By setting the fineness of the threads constituting the woven fabric within the above range, it is possible to obtain a woven fabric having both strength and light weight. Further, by setting the content of the yarn having the fineness in the above range in the above range, it is possible to fabricate a fabric having both strength and light weight.

The woven crimp rate of the warp in the weft multiple woven fabric according to the present invention is preferably 10% to 60%, more preferably 20% to 60%. By setting the woven crimp ratio of the warp to the above range, the elongation in the warp direction is increased, and when used as a chair upholstery, a soft sinking and a comfortable sitting can be realized.

In the weft multiplex woven fabric according to the present invention, the apparent cover factor of either outer layer or both outer layers is preferably 1700 to 3400, and more preferably 2000 to 3000. By setting the cover factor of the woven fabric to the above range, it is possible to suppress the misalignment of the threads constituting the woven fabric and obtain stable stretchability.

Here, the apparent cover factor of the outer layer on each of the front and back is a value calculated as follows.

Apparent cover factor of outer layer = Fa1 ^1/2 x Da1 + Fe1 ^1/2 x De1
Apparent cover factor of back outer layer = Fa2 ^1/2 x Da2 + Fe2 ^1/2 x De2
Fa1: Fineness of warp threads exposed on the outer layer (dtex)
Fa2: Fineness of warp threads exposed on the back outer layer (dtex)
Fe1: Fineness of weft threads exposed on the outer layer (dtex)
Fe2: Fineness of weft threads exposed on the back outer layer (dtex)
Da1: Density of warp threads exposed on the outer layer (book / 2.54 cm)
Da2: Density of warp threads exposed on the back outer layer (book / 2.54 cm)
De1: Density of weft threads exposed on the outer layer (book / 2.54 cm)
De2: Density of weft threads exposed on the back outer layer (book / 2.54 cm)
Weft multiple fabric according to the present invention, it is preferred basis weight is ^{100g / m 2 ~1500g / m 2} . By setting the basis weight within the above range, it is possible to reduce the weight of the product to be applied, and therefore, it can be particularly preferably used for the upholstery of wheelchairs and the upholstery of various vehicles such as automobiles, trains, and aircraft.

The weft multiplex woven fabric according to the present invention preferably has an elongation of 5% to 20% when pulled in the warp direction with a load of 100 N / 50 mm, and more preferably 10% to 20%. By setting the elongation when pulled in the warp direction with a load of 100 N / 50 mm within the above range, it is possible to realize a soft sinking and a comfortable sitting comfort when used as a chair upholstery.

The method for producing the weft multiplex fabric is not particularly limited, but the following method is preferable.

That is, the woven fabric composed of the weft yarns arranged in three or more layers, the warp yarn A composed of the undissolved yarn, and the warp yarn B composed of the melted yarn is melted, the warp yarn B is removed, and the weft yarn and the warp yarn A are separated. A method for obtaining a woven fabric is preferable. At this time, a method of weaving the woven fabric in a state where the tension of the warp B made of the molten yarn is larger than that of the warp A made of the undissolved yarn is more preferable.

More specifically, for example, it can be manufactured as follows.

In the weaving process, it is preferable to use at least two types of warp threads (warp threads A and warp threads B). These are preferably inelastic yarns as described above.

The warp A can be composed of various synthetic fibers such as nylon fibers and polyester fibers, for example. Of these, polyester fibers, which are inelastic yarns, are preferable in terms of strength and dimensional stability. Examples of the polyester fiber of the inelastic yarn include fibers made of polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate, and copolymers thereof.

The warp B is preferably composed of a melted yarn that acts as a temporary yarn during weaving and can be removed after weaving. The dissolved fiber is a fiber that is soluble in a solvent such as water or an alkaline solution. Specific examples of the dissolved fiber include water-soluble fibers such as polyvinyl alcohol-based fibers, isophthalic acid, and 5-sodium sulfoisophthalic acid. And polyester fibers in which a third component such as metoxypolyoxyethylene glycol is copolymerized, easily alkali-soluble fibers such as polylactic acid fibers, and the like can be used, but are not particularly limited.

At the time of weaving, it is preferable that the warp B has a higher tension than the warp A and the warp A has a lower tension within a range that does not hinder the opening. For example, it is preferable that the tension of the warp B is 0.5 to 1.5 cN / dtex and the tension of the warp A is 0.05 to 0.15 cN / dtex to satisfy the above relationship. The number of warp threads A and warp threads B is preferably arranged at a ratio of 1 warp thread B to 2 to 10 warp threads A.

In general, since the crimp rate of the warp is increased in a high-density woven fabric, if the tension of the warp is lowered during weaving, it is difficult to increase the weft density by bumping (weft backlash). However, as described above, if the tension of the warp B is made higher than the tension of the warp A and the tension of the warp A is lowered within a range that does not hinder the opening, the warp A can be used as a fulcrum. Since the weft can be restrained, bumping can be suppressed and the weft density can be maintained high. As a result, when viewed as a woven fabric, the crimp ratio of the warp A can be increased while lowering the tension of the warp. Therefore, by removing the warp B after weaving, flexibility can be imparted to the weft multiple woven fabric. it can.

Further, the warp B is preferably arranged between the warp forming the outer outer layer and the warp forming the outer outer layer of the back.

As the post-processing step performed after weaving, for example, it is preferable to go through the following steps.

(A) Hot water washing The raw yarn oil agent is removed by hot water washing, and the warp yarn B is contracted. The treatment conditions are preferably a temperature of 80 to 98 ° C. and a time of 15 to 40 minutes.

(B) Preheat set The preheat set stabilizes the shape of the warp A whose crimp rate increases as the warp B shrinks. Using a pin tenter, both ends are fixed with pins and heat treatment is performed. The treatment conditions are preferably a temperature of 160 to 190 ° C. and a time of 1 to 10 minutes.

(C) Alkaline treatment The warp B is dissolved by alkaline treatment. Examples of the alkali include sodium hydroxide. The treatment conditions are preferably a concentration of 1 to 4% by mass, a temperature of 80 to 98 ° C., and a time of 5 to 60 minutes.

(D) Heat set (first time)
The purpose of the first heat setting is to remaximize the crimp of the warp threads loosened by the desealing process. Using a pin tenter, heat treatment is performed by fixing both ends with pins in a state of maximally compressing in the warp direction so as not to cause wrinkles. The treatment conditions are preferably a temperature of 160 to 190 ° C. and a time of 3 to 10 minutes.

(E) Heat set (second time)
The purpose of the second heat setting is to obtain a woven fabric in which the warp yarn is stretched to a desired size while leaving the bending point of the crimp and the elongation is adjusted, but the second heat setting may not be performed. Using a pin tenter, heat treatment is performed by fixing both ends with a wire or the like in a state of extending 10 to 30% in the warp direction. The treatment conditions are preferably 10 to 20 ° C. lower than the first heat setting, and the time is preferably 3 to 10 minutes.

The weft multiplex woven fabric of the present invention can be woven without using melted yarn for either the weft or the warp, but in that case, the post-processing step (c) becomes unnecessary.

Next, the weft multiplex woven fabric of the present invention will be described based on examples. The method for measuring the characteristics used in the examples is as follows.

1. 1. Fineness and number of filaments Fineness was measured based on JIS L 1013: 2010 8.3.1 Positive quantity fineness (method A). The number of filaments was measured based on JIS L 1013: 2010 8.4.

2. 2. Weaving density Measured based on JIS L 1096: 2010 8.6.1 (method A). Specifically, the sample is placed on a flat table, the number of warp and weft threads of 0.5 cm is counted at five different locations, excluding unnatural wrinkles and tension, and the average value of each is calculated. , Converted to the number per 2.54 cm.

3. 3. Weft Arrangement Angle Based on a 50-fold magnified photograph of the weft cross section obtained by cutting the woven fabric in the warp direction with an electron microscope, it is located at the center of an arbitrary weft and in a layer adjacent to the weft layer, and is the center of the weft. The angle WA at which the straight line (WD) connecting the center of the weft with the shortest distance and the straight line (TD) in the thickness direction of the fabric intersect was measured.

The center of the weft was the center of the minimum radius circle including all the single fibers constituting the weft. In addition, each weft layer was measured at five points in the warp direction at 10 mm intervals, and the average value was used for the measurement.

Further, when cutting the woven fabric, if necessary, an adhesive such as urethane resin was applied and impregnated on the surface of the woven fabric to fix the constituent yarns so as not to fray.
4. Textile crimp rate of warp yarns in woven fabric A sample (woven fabric) cut parallel to the warp yarn direction is adhered in parallel to the sample table in a non-tensioned state, an enlarged photograph is taken, and as shown in FIG. As a result, the crimp thickness H (mm) and crimp pitch D (mm) of the warp thread 2 that is repeatedly bent are measured, and the crimp shaft length is determined from the crimp thickness H (mm) and crimp pitch D (mm) of the weft thread 1. The sample L (mm) was calculated, and the crimp ratio (C) was calculated by the following equation. This measurement was performed at any five locations, and the average was calculated.
Crimp rate (C) = (L / D-1) x 100 (%)
The crimp height and crimp shaft length of the warp thread 2 are measured at the center of the warp thread 2 that repeats bending in the radial direction and at a point where the inclination of the tangent line to the warp thread 2 becomes 0 °.

Further, when cutting the woven fabric, if necessary, an adhesive such as urethane resin was applied and impregnated on the surface of the woven fabric to fix the constituent yarns so as not to fray.

5. Apparent cover factor of the outer layer The apparent cover factor of the outer layer was calculated as follows.

Apparent cover factor of outer layer = Fa1 ^1/2 x Da1 + Fe1 ^1/2 x De1
Fa1: Fineness of warp threads exposed on the outer layer (dtex)
Fe1: Fineness of weft threads exposed on the outer layer (dtex)
Da1: Density of warp threads exposed on the outer layer (book / 2.54 cm)
De1: Density of weft threads exposed on the outer layer (book / 2.54 cm).

6. Apparent cover factor of the back outer layer The apparent cover factor of the back outer layer was calculated as follows.

Apparent cover factor of back outer layer = Fa2 ^1/2 x Da2 + Fe2 ^1/2 x De2
Fa2: Fineness of warp threads exposed on the back outer layer (dtex)
Fe2: Fineness of weft threads exposed on the back outer layer (dtex)
Da2: Density of warp threads exposed on the back outer layer (book / 2.54 cm)
De2: Density of weft threads exposed on the back outer layer (book / 2.54 cm).

7. Metsuke JIS L 1096: 2010 8.3.2 Measured based on mass per unit area under standard conditions (method A).

8. Elongation rate under load of 100 N / 50 mm in the warp direction JIS L 1096: 2010 8.14.1 Using a constant speed extension type tester according to the JIS method (A method cut strip method), the center of a circle with a diameter of 300 mm of the test piece. The elongation at a tensile speed of 200 mm / min was measured for five samples at a grip interval of 200 mm and a grip width of 50 mm in the warp or weft direction, and the average was calculated.

9. Breaking strength in the warp direction JIS L 1096: 2010 8.14.1 Using a constant speed extension tester according to the JIS method (A method cut strip method), with a grip interval of 200 mm and a grip width of 50 mm in the warp direction. The elongation at 100 N at a tensile speed of 200 mm / min was measured for 5 samples, and the average thereof was calculated.

[Example 1]
As the warp, the weft for the outer layer, and the weft for the inner layer, a polyester multifilament yarn (high-strength polyester 390-B0 manufactured by Toray Industries, Inc.) made of polyethylene terephthalate and having a total fineness of 280 dtex-24 filaments was sweet-twisted at 200 T / m. A thread was used. The weft triple woven fabric having the structure shown in FIG. 2 was woven with the weaving density of the warp threads being 170 threads / 2.54 cm and the weaving density of the weft threads being 145 threads / 2.54 cm. This woven fabric is washed with hot water at a temperature of 80 ° C for 20 minutes, dried at a temperature of 130 ° C. for 2 minutes, and then heat-treated at a temperature of 180 ° C. for 2 minutes while overfeeding 20% only in the warp direction to weave the warp threads. Weft multiple fabrics having a density of 170 threads / 2.54 cm and a weft density of 174 threads / 2.54 cm were obtained.

Table 1 shows the characteristics of the obtained weft multiplex fabric. When the obtained weft multiple woven fabric was used for upholstery, it stretched moderately when seated and was comfortable.

[Example 2]
As the warp yarn, the weft yarn for the outer layer, and the weft yarn for the inner layer, a polyester multifilament yarn having a total fineness of 1670 dtex-288 filament (high-strength polyester 702C manufactured by Toray Industries, Inc.) and a sweet twist of 200 T / m is used to weave the warp yarn. The weaving density of the warp yarns is 80 yarns / 2.54 cm and the weaving density of the weft yarns is the same as in Example 1 except that the weaving density is 80 yarns / 2.54 cm and the weft yarn weave density is 102 yarns / 2.54 cm. 122 yarns / 2.54 cm weft multiplex fabric was obtained.

Table 1 shows the characteristics of the obtained weft multiplex fabric. When the obtained weft multiple woven fabric was used for upholstery, it stretched moderately when seated and was comfortable.

[Example 3]
As the warp, the weft for the outer layer, and the weft for the inner layer, a polyester multifilament yarn (polyester 262 manufactured by Toray Industries, Inc.) having a total fineness of 33 dtex-24 filaments and a sweet twist of 200 T / m is used to increase the weaving density of the warp. The weaving density of the warp threads is 320 lines / 2.54 cm and the weaving density of the weft threads is 480 threads in the same manner as in Example 1 except that the weaving density is 320 threads / 2.54 cm and the weft threads are 400 threads / 2.54 cm. A weft multiplex fabric of /2.54 cm was obtained.

Table 1 shows the characteristics of the obtained weft multiplex fabric. When the obtained weft multiplex woven fabric was used for upholstery, it was comfortable because it stretched moderately when seated, even though it was a woven fabric using threads with low fineness.

[Example 4]
As warp yarns, warp yarn A (non-dissolved yarn): polyester multifilament yarn having a total fineness of 280 dtex-24 filaments used in Example 1, and warp yarn B (dissolved yarn): easily alkaline dissolution in which 5-sodium sulfoisophthalic acid is copolymerized. A polyester fiber (84dtex-24 filament (KB Salen Co., Ltd. alkaline easily soluble polyester yarn BELLPURE 84T-24-BFD)) was used. Further, as the weft for the outer layer and the weft for the inner layer, the polyester multifilament yarn having a total fineness of 280 dtex-24 filament used in Example 1 was used.

Then, the tension of the warp B is 0.9 cN / dtex, the tension of the warp A is 0.1 cN / dtex, the weaving density of the warp is 340 / 2.54 cm, and the weaving density of the weft is 200 / 2.54 cm. The weft triple woven fabric having the structure shown in FIG. 2 was woven. The warp threads A and the warp threads B were arranged at a ratio of one warp thread B to one warp thread A. Further, the warp B was arranged between the warp forming the outer outer layer and the warp forming the outer outer layer of the back.

Next, post-processing was performed by the following steps.

(A) The hot water washing treatment conditions were carried out at a temperature of 80 ° C. and a time of 20 minutes.

(B) Using a preheat set pin tenter, both ends of the woven fabric were fixed with pins and heat treatment was performed. The treatment conditions were a temperature of 170 ° C. and a time of 2 minutes.

(C) Alkaline treatment The warp B was dissolved and removed by alkaline treatment. Sodium hydroxide was used as the alkali. The treatment conditions were a concentration of 2% by mass, a temperature of 95 ° C., and a time of 5 minutes.

(D) Heat set (first time)
Using a pin tenter, heat treatment was performed by fixing both ends with pins in a state of maximally compressing in the warp direction so as not to cause wrinkles in the woven fabric. The treatment conditions were a temperature of 170 ° C. and a time of 3 minutes.

(E) Heat set (second time)
Using a pin tenter, both ends were fixed with a wire or the like in a state of being extended by 20% in the warp direction, and heat treatment was performed. The treatment conditions were a temperature of 180 ° C. and a time of 3 minutes.

Table 1 shows the characteristics of the obtained weft multiplex fabric. When the obtained weft multiple woven fabric was used for upholstery, it stretched moderately when seated and was comfortable.

[Example 5]
As the warp, warp A (non-dissolved yarn): polyester multifilament yarn having a total fineness of 560 dtex-48 filament (high-strength polyester 7795B manufactured by Toray Co., Ltd.), and warp B (dissolved yarn): -sodium used in Example 4. An easily alkali-soluble polyester fiber (84dtex-24 filament) copolymerized with sulfoisophthalic acid was used. Further, as the weft for the outer layer and the weft for the inner layer, a polyester multifilament yarn having the same total fineness of 560 dtex-48 filament as the warp A was used.

Then, the tension of the warp B is 0.9 cN / dtex, the tension of the warp A is 0.1 cN / dtex, the weaving density of the warp is 240 / 2.54 cm, and the weaving density of the weft is 152 / 2.54 cm. The weft triple woven fabric having the structure shown in FIG. 2 was woven. The warp threads A and the warp threads B were arranged at a ratio of one warp thread B to one warp thread A. Further, the warp B was arranged between the warp forming the outer outer layer and the warp forming the outer outer layer of the back.

Next, post-processing was performed under the same conditions as in Example 4. Table 1 shows the characteristics of the obtained weft multiplex fabric. When the obtained weft multiple woven fabric was used for upholstery, there was some sinking when sitting, but it was comfortable.

[Example 6]
Poly (butylene glycol / polytetramethylene ether glycol) terephthalate (“Hytrel” (registered trademark) 6347 and “Hytrel” (registered trademark) 4056 manufactured by Toray DuPont) was used as the thermoplastic polyester-based elastomer.

The above-mentioned "Hytrel" (registered trademark) 6347 (melting point 215 ° C.) polyester elastomer is used as the core component, and "Hytrel" (registered trademark) 4056 (melting point 153 ° C.) polyester-based elastomer is used as the sheath component, and the mass ratio thereof is the core. : A monofilament elastic yarn having a fineness of 400 dtex with a sheath = 70:30 was obtained. This elastic yarn was used as the weft for the outer layer and the weft for the inner layer. Further, as the warp, the polyester multifilament yarn having a total fineness of 280 dtex-24 filaments used in Example 1 was used.

The weft triple woven fabric having the structure shown in FIG. 2 was woven with the weaving density of the warp threads being 170 threads / 2.54 cm and the weaving density of the weft threads being 142 threads / 2.54 cm. This woven fabric was post-processed under the same conditions as in Example 1 to obtain a weft multiple woven fabric having a weaving density of 170 warp threads / 2.54 cm and a weaving density of 110 weft threads / 2.54 cm.

Table 2 shows the characteristics of the obtained weft multiplex fabric. When the obtained weft multiple woven fabric was used for upholstery, it stretched moderately when seated and was comfortable.

[Example 7]
As the weft for the inner layer, after interlacing two 167dtex-48 filament polyester multifilament yarns (high-strength polyester 390 manufactured by Toray Co., Ltd.), a yarn with a sweet twist of 200 T / m is used, and the weaving density of the warp yarns. Weaving was performed in the same manner as in Example 6 except that the weaving density was 170 threads / 2.54 cm and the weft density was 91 threads / 2.54 cm. The weaving density of the warp threads was 170 threads / 2.54 cm and the weaving density of the weft threads was 170 threads / 2.54 cm. A 110-thread / 2.54 cm weft multiplex fabric was obtained.

Table 2 shows the characteristics of the obtained weft multiplex fabric. When the obtained weft multiple woven fabric was used for upholstery, it stretched moderately when seated and was comfortable.

[Example 8]
As the warp, the weft for the outer layer, and the weft for the inner layer, two polyester multifilament yarns (high-strength polyester 709B manufactured by Toray Industries, Inc.) having a total fineness of 1100 dtex-192 filaments were interlaced and then sweet-twisted at 200 T / m. Weaving was performed in the same manner as in Example 1 except that the weaving density of the warp yarns was 68 yarns / 2.54 cm and the weft yarn weaving density was 80 yarns / 2.54 cm, and the weaving density of the warp yarns was 68 yarns / 2 A weft multiplex fabric having a weft density of .54 cm and a weft density of 96 threads / 2.54 cm was obtained.

Table 2 shows the characteristics of the obtained weft multiplex fabric. When the obtained weft multiple woven fabric was used for upholstery, it stretched moderately when seated and was comfortable. However, the basis weight is a little heavy, and its use is considered to be limited for applications in fields where light weight is required, such as vehicle seat materials and bags.
[Example 9]
Weaving density of warp yarns is 320 yarns / 2.54 cm and weaving density of weft yarns is 432 yarns / 2.54 cm in the same manner as in Example 3 except that weaving density of weft yarns is 320 yarns / 2.54 cm. Obtained a woven fabric.

Table 2 shows the characteristics of the obtained weft multiplex fabric. When the obtained weft multiple woven fabric was used for upholstery, it was comfortable, although it did not stretch moderately when seated.

[Comparative Example 1]
As the warp and weft, the polyester multifilament yarn having a total fineness of 280 dtex-24 filaments used in Example 1 was used. A plain woven fabric was woven with a weaving density of warp threads of 56 threads / 2.54 cm and a weaving density of weft threads of 54 threads / 2.54 cm. This woven fabric was post-processed under the same conditions as in Example 1 to obtain a plain woven fabric having a weaving density of 56 warp threads / 2.54 cm and a weaving density of 65 weft threads / 2.54 cm.

The characteristics of the obtained plain woven fabric are shown in Table 3. When the obtained plain woven fabric was used for upholstery, there was little subduction when sitting and it was not comfortable.

[Comparative Example 2]
A monofilament elastic yarn was obtained in the same manner as in Example 6 except that the fineness was 700 dtex. This elastic thread was used as the weft. Further, as the warp, the polyester multifilament yarn having a total fineness of 1670 dtex-288 filament used in Example 2 was used.

A plain woven fabric was woven with the weaving density of the warp threads being 25 threads / 2.54 cm and the weaving density of the weft threads being 39 threads / 2.54 cm. Post-processing was performed under the same conditions as in Example 1 to obtain a plain woven fabric having a weaving density of 25 warp threads / 2.54 cm and a weaving density of 47 weft threads / 2.54 cm.

The characteristics of the obtained plain woven fabric are shown in Table 3. When the obtained plain woven fabric was used for upholstery, there was little subduction when sitting and it was not comfortable.
[Comparative Example 3]
Weaving density of warp yarns is 170 yarns / 2.54 cm and weaving density of weft yarns is 360 yarns / 2.54 cm in the same manner as in Example 4 except that weaving density of weft yarns is 360 yarns / 2.54 cm. Obtained a woven fabric.

Table 3 shows the characteristics of the obtained weft multiplex fabric. When the obtained weft multiple woven fabric was used for upholstery, the subduction at the time of sitting was large and it was not comfortable.
[Comparative Example 4]
As the warp, the weft for the outer layer, and the weft for the inner layer, four polyester multifilament yarns (high-strength polyester 709B manufactured by Toray Industries, Inc.) having a total fineness of 1100 dtex-192 filaments were interlaced and then sweet-twisted at 200 T / m. Weaving was performed in the same manner as in Example 1 except that the weaving density of the warp yarns was 68 yarns / 2.54 cm and the weft yarn weaving density was 58 yarns / 2.54 cm, and the weaving density of the warp yarns was 68 yarns / 2 A weft multiplex fabric having a weft density of .54 cm and a weft density of 70 yarns / 2.54 cm was obtained.

Table 3 shows the characteristics of the obtained weft multiplex fabric. When the obtained weft multiple woven fabric was used for upholstery, there was little subduction when sitting, and it was not comfortable.

The weft multiple woven fabric according to the present invention includes vehicle seat members, shoe skin materials, bags, sports ball members such as soccer and volleyball, adhesive tapes, non-woven fabric base fabrics, interior members, vehicles / houses. It can be used as an inner layer member and a civil engineering material.

H: Crimp height of the warp D: Crimp pitch of the warp L: Crimp shaft length TD: Straight line in the thickness direction of the fabric WD: The center of an arbitrary weft and the center of the weft in a layer adjacent to the weft layer. Straight line WA connecting the center of the weft with the shortest distance: The angle at which the straight line WD and the straight line TD intersect (the overlapping angle of the weft in the thickness direction (°))
1, 1a, 1b, 1c, 1d Weft 2 Warp

Claims (13)

A woven fabric in which wefts are arranged in three or more layers, and the wefts constituting the outer layer of the woven fabric are held by the warp only from the outside of the woven fabric, and the overlap of the wefts constituting the woven fabric in the thickness direction is relative to the thickness direction. Weft multiplex woven fabric with a temperature of 20 ° to 60 °. The weft multiplex fabric according to claim 1, wherein the wefts constituting the inner layer of the woven fabric are held by the warp threads from one outer layer side and also by the warp threads from the other outer layer side. The weft multiplex fabric according to claim 1 or 2, wherein the woven crimp rate of the warp is 10% to 60%. The weft multiplex woven fabric according to any one of claims 1 to 3, wherein the fineness of the yarn constituting the woven fabric is 30 dtex to 2000 dtex. Basis weight is ^{100g / m 2 ~1500g / m 2} , weft multiple fabric according to claim 1. The weft multiplex woven fabric according to any one of claims 1 to 5, wherein the apparent cover factor of either outer layer or both outer layers is 1700 to 3400. The weft multiplex woven fabric according to any one of claims 1 to 6, wherein the warp and weft that make up the woven fabric are made of inelastic yarn. The weft multiplex woven fabric according to claim 7, wherein the inelastic yarn is polyester. The weft multiplex woven fabric according to claim 8, wherein the inelastic yarn is polyethylene terephthalate. The weft multi-woven fabric according to claim 7, wherein the inelastic yarn is a multifilament. The weft multiple woven fabric according to any one of claims 1 to 10, wherein the elongation when pulled in the warp direction with a load of 100 N / 50 mm is 5% to 20%. The method for producing a weft multiplex fabric according to any one of claims 1 to 11.
A woven fabric composed of warp yarns composed of three or more warp yarns and warp yarns A composed of undissolved yarns and warp yarns B composed of melted yarns is melted, and the warp yarns B are removed to obtain a woven fabric composed of weft yarns and warp yarns A. A method for producing a multi-woven weft yarn. The method for producing a weft multiplex woven fabric according to claim 12, wherein the woven fabric is woven in a state where the tension of the warp B made of molten yarn is larger than that of the warp A made of undissolved yarn.

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