JP2022033469A - Stretch multiple fabric and its manufacturing method - Google Patents

Abstract

To provide a stretch multiple fabric that has amenity same as a conventional multiple gauze fabric, realizes comfortable wearing feeling due to the stretch property and can be used as a practical clothing without spoiling aesthetic feeling due to generation of shape collapse and pill.SOLUTION: A stretch multiple fabric is, after weaving a multiple woven fabric, treated with liquid ammonia and has stretch property in a width direction of the cloth without containing any elastic fiber, has a value of elongation rate when a load of [(7.35 N/50 mm width)×60 minutes] is applied is 10% or larger, and a value of elongation recovery rate when 24 hours passed after removal of the load is 60% or larger.SELECTED DRAWING: Figure 1

Description

The present invention relates to stretch multi-layer woven fabrics. In particular, the present invention relates to a stretch multiple woven fabric characterized by being excellent in stretchability even if it is a multiple woven fabric made of a gauze-like coarse plain woven fabric.

In recent years, multiple gauze woven fabrics in which two or three pieces of gauze fabric, which is a coarse plain woven fabric, are layered have become widespread. The multi-layer gauze woven fabric uses a layer of gauze fabric that is highly hygroscopic and flexible, so it has good hygroscopicity, breathability, light weight, feel, and texture, and gives the user a feeling of comfort. For this reason, it has been used for towels for wiping sweat, handkerchiefs, baby products, etc., and has also come to be used for practical clothing such as pajamas.

Also, in the case of multiple gauze woven fabrics, in order to further improve the texture and comfort when worn, multiple gauze woven fabrics that use sweet twisted yarn for the cotton yarn that constitutes the gauze are also being used for bedding such as pajamas. ..

For example, in Patent Document 1 below, in order to provide a gauze woven fabric that is soft to the touch, has breathability, and has excellent heat retention, a gauze woven fabric composed of a triple layer of a front layer gauze, a back surface layer gauze, and an intermediate layer gauze. Has been proposed. In this gauze woven fabric, the twisting coefficient of the twisted yarn used for the front layer gauze and the back surface layer gauze is 3.3 or less, while the twisting coefficient of the twisted yarn used for the intermediate layer gauze is 3.5 or more. It is a normal twisted yarn.

Patent No. 5534383

Pajamas and other practical clothing are sewn loosely with an emphasis on comfort. In addition, when the multiple gauze fabric is used for pajamas and the like, the texture and comfort are further improved. On the other hand, in recent years, practical clothing is often required to have an appropriate stretchability called comfort stretch. In particular, since pajamas and the like are worn in a relaxed state and are also worn at bedtime, it is required to add appropriate stretchability in addition to loose sewing.

However, since the multiple gauze woven fabric is a plain woven fabric made of cotton yarn, there is a problem that it has poor elasticity and does not have stretchability. Further, the multiple gauze woven fabric is made of a plain woven fabric having a coarse mesh and easily loses its shape, and even if it is comfortable, there is a problem that the aesthetic appearance is deteriorated by wearing or washing. Furthermore, in pajamas using sweet-twisted yarn, pilling (also referred to as "pilling") is likely to occur due to wearing and washing, and even if it is comfortable, there is a problem that the aesthetic appearance deteriorates due to wearing and washing. ..

Therefore, in response to the above, the present invention has the same comfort as the conventional multiple gauze woven fabric, realizes a comfortable fit due to stretchability, and is aesthetically pleasing due to the shape loss and the generation of pills. It is an object of the present invention to provide a stretch multi-layer woven fabric that can be used as practical clothing without being damaged.

In solving the above problems, as a result of diligent research, the present inventors focused on the flexibility and dimensional settability (morphological stability effect) of the liquid ammonia treatment, which is a processing method for cotton fabrics, and twisted the cotton yarn used for multiple fabrics. We have found that the above object can be achieved by devising the coefficient, and have completed the present invention.

That is, according to the description of claim 1, the stretch multiple woven fabric according to the present invention is described.
A multi-layered fabric in which three or more cotton fabrics are knotted by warp and / or weft.
Liquid ammonia treatment is applied after weaving,
It has stretchability in the width direction of the woven fabric without containing elastic fibers, and the value of the elongation rate when a load of [(7.35 N / 50 mm width) x 60 minutes] is applied is 10% or more, and the load is released. It is characterized in that the value of the elongation recovery rate after 24 hours has passed is 60% or more.

Further, according to the second aspect of the present invention, the stretch multiplex fabric according to the first aspect of the present invention.
In the liquid ammonia treatment, the woven fabric width of the multiple woven fabric is shrunk by 15% or more.

Further, according to the description of claim 3, the present invention is the stretch multiplex fabric according to claim 1 or 2.
The multiple woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer.
In both outer layer fabrics of the two outer layer fabrics, the apparent twist coefficient of the warp yarn after the liquid ammonia treatment is 3.5 or more, and the apparent twist coefficient of the warp yarn is less than 3.5.
In the one or more inner layer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment is 3.5 or more, and the apparent twist coefficient of the warp is 4.0 or more.

Further, according to the description of claim 4, the present invention is the stretch multiplex fabric according to claim 1 or 2.
The multiple woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer.
In both outer layer woven fabrics of the two outer layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp and weft is 3.0 or less, and the warp after the liquid ammonia treatment. The apparent twist coefficient of the weft is 3.5 or more, and the apparent twist coefficient of the weft is 3.1 or more.
In the one or more inner layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp is 3.5 or more, and the appearance of the warp after the liquid ammonia treatment is The twist coefficient of the weft is 3.5 or more, and the apparent twist coefficient of the weft is 4.0 or more.

Further, according to the description of claim 5, the present invention is the stretch multiplex fabric according to claim 1 or 2.
The multiple woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer.
In one of the two outer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment is 3.5 or more, and the apparent twist coefficient of the warp is less than 3.5.
In the other outer woven fabric of the two outer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment is 3.5 or more, and the apparent twist coefficient of the warp is 4.0 or more.
In the one or more inner layer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment is 3.5 or more, and the apparent twist coefficient of the warp is 4.0 or more.

Further, according to the description of claim 6, the present invention is the stretch multiplex fabric according to claim 1 or 2.
The multiple woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer.
In one of the two outer layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp and weft is 3.0 or less, and after the liquid ammonia treatment. The apparent twist coefficient of the warp is 3.5 or more, and the apparent twist coefficient of the warp is 3.1 or more.
In the other outer layer woven fabric of the two outer layer woven fabrics, the twist coefficient of the warp yarn before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp and weft is 3.5 or more, and after the liquid ammonia treatment. The apparent twist coefficient of the warp is 3.5 or more, and the apparent twist coefficient of the warp is 4.0 or more.
In the one or more inner layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp is 3.5 or more, and the appearance of the warp after the liquid ammonia treatment is The twist coefficient of the weft is 3.5 or more, and the apparent twist coefficient of the weft is 4.0 or more.

Further, according to the description of claim 7, the present invention is the stretch multiplex fabric according to any one of claims 3 to 6.
The two outer layer woven fabrics and the one or more inner layer woven fabrics constituting the multiple woven fabric are both plain weave gauze-like woven fabrics.

According to the above configuration, the stretch multi-woven fabric according to the present invention is composed of a multi-woven fabric in which three or more cotton fabrics are knotted by warp and / or weft. After weaving the multiple fabric, it is treated with liquid ammonia. In addition, it has stretchability in the width direction of the woven fabric without containing elastic fibers, and the value of the elongation rate when a load of [(7.35 N / 50 mm width) × 60 minutes] is applied is 10% or more. .. Further, the value of the elongation recovery rate when 24 hours have passed after the load is released is 60% or more.

As a result, it has the same comfort as a conventional multiple gauze woven fabric, realizes a comfortable fit due to stretchability, and can be used as practical clothing without spoiling the aesthetic appearance due to shape loss or generation of pills. Stretch multiple fabrics can be provided.

Further, according to the above configuration, the woven fabric width of the multiple woven fabric may be shrunk by 15% or more in the liquid ammonia treatment. This makes it possible to exert the above-mentioned action and effect more concretely.

Further, according to the above configuration, the multi-layer woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer. In both outer layer fabrics of the two outer layer fabrics, the apparent twist coefficient of the warp yarn after the liquid ammonia treatment may be 3.5 or more, and the apparent twist coefficient of the warp yarn may be less than 3.5. Further, in one or more inner layer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment may be 3.5 or more, and the apparent twist coefficient of the warp may be 4.0 or more. As a result, the above-mentioned action and effect can be more specifically and more effectively exerted.

Further, according to the above configuration, the multi-layer woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer. In both outer layer woven fabrics of the two outer layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp and weft is 3.0 or less, and the appearance of the warp after the liquid ammonia treatment is apparent. The twist coefficient of the weft may be 3.5 or more, and the apparent twist coefficient of the weft may be 3.1 or more. Further, in one or more inner layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp is 3.5 or more, and the appearance of the warp after the liquid ammonia treatment is The twist coefficient of the warp and weft may be 3.5 or more, and the apparent twist coefficient of the weft may be 4.0 or more. As a result, the above-mentioned action and effect can be more specifically and more effectively exerted.

Further, according to the above configuration, the multi-layer woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer. In one of the two outer layer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment may be 3.5 or more, and the apparent twist coefficient of the weft may be less than 3.5. On the other hand, in the other outer layer woven fabric of the two outer layer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment may be 3.5 or more, and the apparent twist coefficient of the weft may be 4.0 or more. Further, in one or more inner layer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment may be 3.5 or more, and the apparent twist coefficient of the warp may be 4.0 or more. As a result, the above-mentioned action and effect can be more specifically and more effectively exerted.

Further, according to the above configuration, the multi-layer woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer. In one of the two outer layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp is 3.0 or less, and the warp after the liquid ammonia treatment is The apparent twist coefficient may be 3.5 or more, and the apparent twist coefficient of the warp and weft may be 3.1 or more. On the other hand, in the other outer layer woven fabric of the two outer layer woven fabrics, the twist coefficient of the warp yarn before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp and weft is 3.5 or more, and after the liquid ammonia treatment. The apparent twist coefficient of the warp may be 3.5 or more, and the apparent twist coefficient of the warp may be 4.0 or more. Further, in one or more inner layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp is 3.5 or more, and the appearance of the warp after the liquid ammonia treatment is The twist coefficient of the warp and weft may be 3.5 or more, and the apparent twist coefficient of the weft may be 4.0 or more. As a result, the above-mentioned action and effect can be more specifically and more effectively exerted.

Further, according to the above configuration, the two outer layer woven fabrics and the one or more inner layer woven fabrics constituting the multiple woven fabric may be plain weave gauze-like woven fabrics. As a result, the above-mentioned action and effect can be more specifically and more effectively exerted.

It is a graph which shows the value of the elongation rate (%) from the 1st day to the 5th day of the stretch triple gauze-like woven fabric which concerns on Example 1. FIG. It is a graph which shows the value of the elongation recovery rate (%) from the 1st day to the 5th day of the stretch triple gauze-like woven fabric which concerns on Example 1. FIG. It is a graph which shows the monitor test result (goodness of touch) of the stretch triple gauze-like woven fabric which concerns on Example 1 and the monitor test of Comparative Example 1. It is a graph which shows the monitor test result (comfort when the foot is raised) of the stretch triple gauze-like woven fabric which concerns on Example 1, and the photograph which shows the test state. It is a graph which shows the monitor test result (comfort when crouching) of the stretch triple gauze-like woven fabric which concerns on Example 1, and the photograph which shows the test state. It is a graph which shows the monitor test result (comfort when the body is rolled up) of the stretch triple gauze-like woven fabric which concerns on Example 1, and the photograph which shows the test state. It is a graph which shows the monitor test result (comfort when the arm is raised) of the stretch triple gauze-like woven fabric which concerns on Example 1, and the photograph which shows the test state.

First, terms used in the present invention will be described. In the present invention, the multiple woven fabric is a woven fabric in which two or more woven fabrics are stacked, and may be a double woven fabric, a triple woven fabric, or a quadruple or more woven fabric. Each woven fabric is knotted with warp and weft, or only warp and weft to form one woven fabric. The woven fabric of each woven fabric to be layered is not particularly limited, and may be a plain woven fabric, a twill woven fabric, a twill woven fabric, or the like, but a plain woven fabric is preferable.

Further, among the plain woven fabrics, it is preferable to use a coarse woven fabric using fine threads from the viewpoints of breathability, lightness, touch, texture and the like. As a coarse plain woven fabric using fine threads, there is generally a gauze woven fabric. Gauze fabric is defined as a soft thin cotton fabric with a coarse plain weave made of sweet twisted yarn (New Textile Comprehensive Dictionary; Senken Shimbun). For example, it is said that 40-count cotton single yarn is used for both the warp and weft, and the total warp and weft density is about 50 to 60 yarns / inch. Therefore, in the present invention, each woven fabric to be layered is not limited to a gauze woven fabric, and a similar coarse plain woven fabric including a gauze woven fabric is referred to as a “gauze-like woven fabric”.

Further, the type of yarn constituting each of the woven fabrics to be stacked is not limited to 100% cotton as in the gauze woven fabric, and yarn mainly made of cotton can be used. However, since the liquid ammonia treatment described later is performed, it is required that this treatment is likely to be effective. Therefore, in the present invention, it is particularly preferable to use 100% cotton yarn.

The twist coefficient is a coefficient indicating the effect of twisting (tightness of the yarn) regardless of the thickness of the yarn. In the case of cotton yarn, the twist coefficient α is represented by “α = number of twists / √N”. Here, the number of twists is "number of times / inch", and N is "constant weight type count". Regardless of the thickness (count) of the yarn, in general, α = 3.3 or less is called sweet twist, α = 3.5 to 4.5 is normal twist, and a twist coefficient higher than that is called strong twist.

In the present invention, in order to impart stretchability, the multi-woven fabric after weaving is treated with liquid ammonia and contracted in the width direction of the fabric. Therefore, the weft of the multi-woven fabric shrinks due to the liquid ammonia treatment, and the thickness (count N) and the twisting coefficient (α) of the yarn change from the stage of the yarn after weaving. Therefore, in the present invention, the thickness of the shrunk yarn after the liquid ammonia treatment is referred to as "apparent count", and the twist coefficient is referred to as "apparent twist coefficient". The twist coefficient and the apparent twist coefficient of each woven fabric in the present invention will be described later.

Further, in the present invention, the liquid ammonia treatment is generally performed as a processing method for cotton fabric, and the cotton fabric is immersed in liquid ammonia (boiling point: -33.4 ° C) for a short time and then heated to around 130 ° C. It is a process to remove ammonia by contacting it with a cotton fabric. Generally, the wrinkle resistance, shrinkage resistance, strength and flexibility of the cotton fabric are improved. In the present invention, it is preferable to shrink the multiple woven fabric by 15% or more in the width direction of the woven fabric, and more preferably about 20% (details will be described later). By shrinking the multi-woven fabric by 15% or more in the width direction of the woven fabric, practical and comfortable stretchability can be exhibited.

Hereinafter, the stretch multiple woven fabric according to the present invention will be described by embodiment. In the present embodiment, a triple woven fabric made of 100% cotton will be described as an example, but the present invention is not limited to the following embodiments.

≪Weaving of multiple fabrics≫
In order to produce the stretch multi-woven fabric according to the present embodiment, first, the multi-woven fabric is woven by a usual method. Various looms such as a jacquard loom with a warp opening device, a dobby loom, and a tappet loom can be used for weaving multiple woven fabrics.

The triple woven fabric according to the present embodiment is composed of two outer layer woven fabrics constituting the outer layer and one inner layer woven fabric constituting the inner layer. In the present embodiment, it is preferable to use a sweet twisted yarn having a small twisting coefficient in the weft of one or both of the two outer layer fabrics in the weaving stage. By using a sweet twisted yarn for the warp and weft, it is possible to maintain a good surface texture without strengthening the twist as in the strong twisted yarn even after shrinkage due to the liquid ammonia treatment.

When wefts having different twist coefficients are used in the two outer layer woven fabrics, the texture after shrinkage due to the ammonia treatment may be different between the two outer layer woven fabrics. In this case, which of the two outer layer woven fabrics is used for the front surface layer or the back surface layer may be used properly depending on the intended use. Therefore, here, one of the two outer layer woven fabrics is distinguished as the first outer layer woven fabric and the other as the second outer layer woven fabric.

First, the first outer layer woven fabric is a plain woven fabric made of 100% cotton. It is preferable to use the following cotton yarns for the warp and weft of the first outer layer woven fabric in the weaving stage. Ordinary twisted yarn is used for the warp. For example, a single yarn having a twist coefficient of 3.5 to 4.5, preferably 3.5 to 4.0, which is 20 to 70 counts, preferably 40 to 60 counts, is used. On the other hand, sweet twisted yarn is used for the warp and weft. For example, a single yarn having a twist coefficient of 3.3 or less, preferably 3.0 or less, having a twist coefficient of 20 to 50, preferably 20 to 40, is used. As the warp and weft, a super sweet twisted yarn or a non-twisted yarn having a twisting coefficient of 2.0 or less may be used.

In the first outer layer woven fabric, the use of sweet twisted yarn for the warp compared to the warp has a larger apparent twisting coefficient of the weft after the liquid ammonia treatment, and the yarn is tightened like a strong twisted yarn and the texture of the front surface (or the back surface). This is so as not to damage the. For example, when a sweet twisted yarn with a twist coefficient of 3.0 is used for the warp and weft and is shrunk by about 20% by liquid ammonia treatment, the apparent count of the warp and weft is about 32 count, and the apparent twist coefficient is about about. It becomes 3.4. In this state, a soft texture close to that of sweet twisted yarn can be maintained.

On the other hand, since the warp yarn hardly shrinks after the liquid ammonia treatment, a normal twisted yarn may be used. Both the warp and weft yarns may be yarn-dyed yarns dyed at the yarn stage, or the multi-woven fabric after weaving may be dyed.

The warp and weft density of the first outer layer woven fabric is not particularly limited, but from the viewpoint of breathability, lightness, texture, texture, etc., a gauze woven fabric or a gauze-like woven fabric, which is a coarse plain woven fabric, may be used. preferable. In the present embodiment, the warp density is about 30 to 60 threads / inch, preferably about 45 to 55 threads / inch. On the other hand, the weft density is about 30 to 50 threads / inch, preferably about 30 to 45 threads / inch. As described above, the reason why the weft density is made smaller than the warp density is that a thicker thread is used as the weft than the warp to improve the stretchability.

Next, the second outer layer woven fabric is a plain woven fabric made of 100% cotton. In the second outer layer woven fabric, a sweet twisted yarn may be used as the weft as in the case of the first outer layer woven fabric. On the other hand, when the sweet twisted yarn is not used for the weft of the second outer layer woven fabric, it is preferable to use the following cotton yarn for the warp and weft of the second outer layer woven fabric in the weaving stage. As the warp, a single yarn having the same count and the same twist coefficient as that of the first outer layer woven fabric is used. On the other hand, ordinary twisted yarn is used for the weft. For example, a single yarn having a yarn count of 20 to 50, preferably 30 to 50, and a twist coefficient of 3.5 to 4.5, preferably 4.0 to 4.3 is used.

In the second outer layer woven fabric, unlike the first outer layer woven fabric, when a normal twisted yarn is used instead of a sweet twisted yarn as the weft, the apparent twisting coefficient of the weft after the liquid ammonia treatment becomes large, and strong stretchability is obtained. Can be expressed. For example, when a normal twisted yarn with a twist coefficient of 4.0 with a 50th count is used for the weft and shrunk by about 20% by liquid ammonia treatment, the apparent count of the warp and weft becomes about 40th, and the apparent twisting coefficient is about. It is about the same as 5.4 and strong twisted yarn. In this state, strong stretchability similar to that of strong twisted yarn can be exhibited.

Further, the warp and weft density of the second outer layer woven fabric is about the same as that of the first outer layer woven fabric, and the reason why the weft density is smaller than the warp density is that a thicker yarn is used for the weft than the warp to improve the stretchability. Because.

On the other hand, since the warp yarn hardly shrinks after the liquid ammonia treatment, a normal twisted yarn may be used. Both the warp and weft yarns may be yarn-dyed yarns dyed at the yarn stage, or the multi-woven fabric after weaving may be dyed.

Next, the inner layer woven fabric is a plain woven fabric made of 100% cotton. As the warp and weft of the inner layer woven fabric, it is preferable to use a single yarn having the same count and the same twist coefficient as the second outer layer woven fabric in which the above-mentioned weft is a normal twisted yarn. As described above, as the warp and weft of the inner layer woven fabric, ordinary twisted yarn is used instead of sweet twisted yarn or non-twisted yarn. In addition, unlike the above-mentioned second outer layer woven fabric, strong twisted yarn may be used for the weft in the weaving stage. This makes it possible to develop even stronger stretchability.

≪Liquid ammonia treatment≫
Next, the triple woven fabric in which the above-mentioned first outer layer woven fabric, inner layer woven fabric, and second outer layer woven fabric are woven into three layers is treated with liquid ammonia. Before the liquid ammonia treatment, a pre-process such as degluing is performed. When the triple woven fabric is woven with yarn dyed yarn, the woven fabric is widened to a predetermined width after degluing and drying, and then treated with liquid ammonia. In the case of dyeing after weaving, after weaving, degluing, scouring, bleaching, drying and widthing are performed, and dyeing or printing is performed. The dyed triple woven fabric is woven to a predetermined woven fabric width and then treated with liquid ammonia. In the case of dyeing after weaving, dyeing or printing may be performed after the liquid ammonia treatment.

In this embodiment, a general liquid ammonia treatment apparatus can be used. Generally, a liquid ammonia treatment device consists of a dipping device for immersing a fabric in liquid ammonia, a timing device for promoting the permeation and reaction of liquid ammonia, a drying device for evaporating liquid ammonia, and a steaming device for removing residual ammonia. , The textile is run and processed continuously.

The triple woven fabric according to the present embodiment rapidly shrinks when it absorbs liquid ammonia. In the triple woven fabric that continuously travels in the liquid ammonia treatment device, tension is applied in the length direction (warp direction) of the woven fabric, and the shrinkage of the warp is suppressed. On the other hand, no tension is applied in the woven fabric width direction (weft direction), and the weft contracts significantly. After removing the liquid ammonia, the triple woven fabric memorizes the shape in a state where the woven fabric width is greatly contracted. In the present embodiment, the length of the woven fabric hardly shrinks, while the width of the woven fabric shrinks by 15% or more from the state before the treatment.

It is preferable to control the running conditions of the triple woven fabric to be introduced into the liquid ammonia treatment apparatus and fix the woven fabric to a predetermined width. In the present embodiment, the width of the woven fabric is preferably shrunk by 15% or more, and more preferably about 20%. By shrinking the woven fabric width by 15% or more, the triple woven fabric exhibits practical and comfortable stretchability in the woven fabric width direction. In the present embodiment, by shrinking by 15% or more in the width direction of the woven fabric, the value of the elongation rate is 10% or more, in a good case, 12% or more, and the value of the elongation recovery rate is 60% or more, in a good case. Can obtain a stretch triple woven fabric that is 70% or more.

In this way, the warp and weft of the triple woven fabric hardly shrink, and only the warp and weft shrink. As a result, the count and twist coefficient of the warp of the triple woven fabric after the liquid ammonia treatment hardly change. On the other hand, the count of the warp and weft becomes large (thick) and the twisting coefficient becomes large (the yarn is tightened), and the stretchability is exhibited like a strong twisted yarn.

It is considered that the strength of this stretchability is largely contributed by the second outer layer woven fabric and the interior woven fabric, which have a relatively large twist coefficient of the warp and weft before the liquid ammonia treatment. On the other hand, the first outer layer woven fabric, which had a small twist coefficient of the warp and weft before the liquid ammonia treatment, also contributes to the stretchability, but it is considered that the contribution to the texture of the surface is larger than that. From these facts, it is possible to develop stronger stretchability by increasing the number of interior woven fabrics.

After being washed with water and dried, the triple woven fabric treated with liquid ammonia is given a finishing agent such as a softener and finished to a predetermined standard (length and width). If necessary, sanforizing (mechanical shrink-proofing) or raising may be performed. Further, in order to further improve the effect of shape memory having stretchability, resin processing or the like may be applied. In this way, the stretch multiplex woven fabric according to the present embodiment is obtained.

In the present invention, liquid ammonia treatment is adopted in order to shrink the triple woven fabric in the width direction of the woven fabric. In addition to liquid ammonia, mercerization using a high-concentration sodium hydroxide aqueous solution may be used to shrink the cotton fabric. However, the liquid ammonia treatment has a greater flexibility of the woven fabric after treatment and a morphological stabilizing effect in a shrunk state than the mercerized treatment, and can realize a comfortable fit due to the flexibility and stretchability which are the objects of the present invention. can.

Next, the stretch multiple woven fabric according to this embodiment will be described by each Example. The present invention is not limited to the following examples.

In the first embodiment, a stretch multi-layer woven fabric (stretch triple gauze-like woven fabric) using yarn dyed yarn will be described.

≪Weaving of multiple fabrics≫
The stretch multiple woven fabric according to the first embodiment is a triple gauze-like woven fabric made of 100% cotton, and the first outer layer woven fabric, the inner layer woven fabric, and the second outer layer woven fabric are connected and woven by a dobby loom. The first outer layer woven fabric was a striped front surface woven fabric using yarn dyed yarn, and the second outer layer woven fabric was a back surface woven fabric.

As the first outer layer woven fabric (surface woven fabric), a cotton single yarn having a warp yarn of 60 counts and a twist coefficient of 3.8 was used, and a weft yarn having a yarn count of 40 counts and a twist coefficient of 3.0 was used. As the inner layer woven fabric, a cotton single yarn having a warp yarn of 60 counts and a twist coefficient of 3.8 was used, and a cotton single yarn having a warp yarn of 50 counts and a twist coefficient of 4.0 was used. The second outer layer woven fabric (back side woven fabric) has the same structure as the inner layer woven fabric, and uses 60 count cotton single yarn with a twist coefficient of 3.8 for the warp and 50 count cotton single yarn with a twist coefficient of 4.0 for the warp and weft. used.

≪Liquid ammonia treatment≫
The triple gauze-like woven fabric woven with yarn-dyed yarn was de-glued, dried, and then widened. Each layered woven fabric after width-out had a warp density of 50 threads / inch and a weft density of 43 threads / inch. Next, the liquid ammonia treatment of the triple gauze-like woven fabric was performed using the liquid ammonia treatment device used for ordinary woven fabrics. The triple gauze-like woven fabric treated with liquid ammonia was washed with water, dried, tumbler-dried with a softener, and subjected to sanforizing to obtain a stretch triple gauze-like woven fabric of Example 1.

Each layer woven fabric of the stretch triple gauze-like woven fabric of Example 1 had a warp density of 60 threads / inch and a weft density of 43 threads / inch. From this, the triple gauze-like woven fabric hardly shrinks in the length direction (warp and weft direction) of the woven fabric by the liquid ammonia treatment, and shrinks by about 20% in the woven fabric width direction (weft direction).

≪Physical characteristic evaluation≫
Next, the physical characteristics of the obtained stretch triple gauze-like woven fabric were evaluated. As evaluation items, the apparent count of the warp and weft and the apparent twist coefficient were calculated. Next, in order to evaluate the stretchability, the elongation elastic modulus (elongation rate and elongation recovery rate) under a constant load was evaluated. In addition, the comfort of wearing pajamas was evaluated by a monitor test. In addition, various physical characteristics (water absorption, heat retention, breathability) for pajamas were also confirmed.

1. 1. Apparent count and apparent twist coefficient First, the apparent count and apparent twist coefficient of the warp and weft after the liquid ammonia treatment were calculated. As described above, in the first embodiment, the liquid ammonia treatment hardly shrinks in the length direction (warp and weft direction) of the woven fabric, and shrinks by about 20% in the woven fabric width direction (weft direction). Therefore, the apparent count was calculated assuming that the weight of the warp and weft (weight per unit length) was increased by 20%. Further, assuming that the number of twists (number of times / inch) of the warp and weft was also increased by 20%, the apparent twist coefficient was calculated from the formula "α = number of twists / √N" of the twist coefficient. Table 1 shows the count and twist coefficient before shrinkage and the apparent count and apparent twist coefficient after shrinkage for the warp and weft of the woven fabric of each layer.

In Table 1, all of the first outer layer woven fabric (front surface woven fabric), the inner layer woven fabric, and the second outer layer woven fabric (back surface woven fabric) have a thicker apparent count due to the shrinkage of the warp and weft by 20%. In addition, the apparent twist coefficient of the weft calculated by using the number of twists increased by 20% of the weft and the apparent count is also large.

The apparent twist coefficient of the warp and weft of the surface woven fabric is 3.4, which is closer to the sweet twist than the normal twist, which is considered to contribute to the softness of the texture of the surface woven fabric. On the other hand, the apparent twist coefficient of the inner layer woven fabric and the back surface woven weft has reached 5.4, which is a strong twist, which is considered to exhibit strong stretchability.

2. 2. Elongation modulus (elongation rate and elongation recovery rate)
Since this Example 1 relates to a stretch triple gauze-like woven fabric for pajamas, an original test method (according to the Boken Quality Evaluation Organization) for evaluating an appropriate stretchability for a lightweight woven fabric was adopted.

The elongation rate test method is based on JIS L 1096 (method B), and the load and time are changed. Specifically, after setting a test piece having a width of 50 mm and a length of 300 mm in a tensile tester, a mark is placed at an interval of 200 mm (L0), and a predetermined load (7.35 N / 50 mm width) is held for 60 minutes. The length (L1) of is measured, and the following formula (1)

Elongation rate (%) = [(L1-L0) / L0] × 100 ... (1)

The value of the elongation rate (%) was obtained in. Further, the above test was set as the test on the first day, and the value of the elongation rate (%) from the second day to the fifth day was determined with the same test piece. Table 2 shows the values of the obtained elongation rate (%) from the 1st day to the 5th day. Further, these values are shown in a graph in FIG.

On the other hand, in the extension recovery rate test method, when 24 hours have passed after the load is released in the extension rate test piece, the initial load is applied and the length (L2) between the marks is measured, and the following formula (2) is used.

Elongation recovery rate (%) = [(L1-L2) / (L1-L0] × 100 ... (2)

The value of the elongation recovery rate (%) was obtained in. Further, the above test was set as the test on the first day, and the value of the elongation recovery rate (%) from the second day to the fifth day was determined with the same test piece. Table 2 shows the values of the obtained elongation recovery rate (%) from the 1st day to the 5th day. Further, these values are shown in a graph in FIG.

In Table 2 and FIG. 1, the values of the elongation rate (%) from the 1st day to the 5th day were all around 12%, and stable and good results of 10% or more were obtained over 5 days. Further, in Table 2 and FIG. 2, the values of the elongation recovery rate (%) from the 1st day to the 5th day are all 65% to 74%, which is stable and good at 60% or more over 5 days. I got the result. From these results, the stretch triple gauze-like woven fabric according to Example 1 was stable and had good stretchability.

3. 3. Comfort (monitor test)
Next, the stretch triple gauze-like woven fabric according to Example 1 was actually sewn on pajamas and a monitor test on comfort was carried out. Specifically, five monitors evaluated the comfort of the skin, the comfort when raising the legs, the comfort when crouching, the comfort when curling up, and the comfort when raising the arms. bottom.

For comparison, a conventional triple gauze-like fabric (without stretchability) woven with the same configuration as that of Example 1 and not treated with liquid ammonia was used as Comparative Example 1 and evaluated in the same manner by the same monitor. .. Table 3 shows the evaluation results of Example 1 and Comparative Example 1. Further, these evaluation results are shown in graphs in FIGS. 3 to 7.

In Table 3 and FIGS. 3 to 7, all five monitors made the comfort of the pajamas sewn with the stretch triple gauze-like woven fabric according to Example 1 higher than those of the conventional product (Comparative Example 1) in all the evaluation items. You can see that it was evaluated. In addition, various physical properties (water absorption, heat retention, breathability) for pajamas were also evaluated, and these physical property values were also good, and they had the same comfort as the conventional multi-layer gauze fabric. Further, the pajamas sewn with the stretch triple gauze-like woven fabric according to the first embodiment were repeatedly washed at home, but the appearance was not spoiled due to the shape loss and the generation of pills.

In the second embodiment, a stretch multi-layer woven fabric (stretch triple gauze-like woven fabric) using yarn dyed yarn will be described as in the first embodiment.

≪Weaving of multiple fabrics≫
The stretch multiple woven fabric according to the second embodiment is a triple gauze-like woven fabric made of 100% cotton as in the first embodiment, and the first outer layer woven fabric, the inner layer woven fabric and the second outer layer woven fabric are connected and woven by a dobby loom. bottom. The first outer layer woven fabric was a striped front surface woven fabric using yarn dyed yarn, and the second outer layer woven fabric was a back surface woven fabric.

As the first outer layer woven fabric (surface woven fabric), a 40-count cotton single yarn having a twist coefficient of 3.8 was used for the warp, and a 20-count, untwisted cotton single yarn was used for the weft. As the inner layer woven fabric, a cotton single yarn having a warp yarn of 40 counts and a twist coefficient of 3.8 was used, and a cotton single yarn having a warp yarn of 30 counts and a twist coefficient of 4.16 was used. The second outer layer woven fabric (back side woven fabric) has the same structure as the inner layer woven fabric, and uses 40 count cotton single yarn with a twist coefficient of 3.8 for the warp and 30 count cotton single yarn with a twist coefficient of 4.16 for the warp and weft. used.

≪Liquid ammonia treatment≫
The triple gauze-like woven fabric woven with yarn-dyed yarn was de-glued, dried, and then widened. Each layered woven fabric after width-out had a warp density of 55 threads / inch and a weft density of 30 threads / inch. Next, the liquid ammonia treatment of the triple gauze-like woven fabric was performed using the liquid ammonia treatment device used for ordinary woven fabrics. The triple gauze-like woven fabric after the liquid ammonia treatment was washed with water and dried, and then the surface woven fabric was brushed, a softener was applied, and the width was widened to obtain the stretch triple gauze-like woven fabric of Example 2.

Each layer woven fabric of the stretch triple gauze-like woven fabric of Example 2 had a warp density of 66 threads / inch and a weft density of 30 threads / inch. From this, the triple gauze-like woven fabric hardly shrinks in the length direction (warp and weft direction) of the woven fabric by the liquid ammonia treatment, and shrinks by about 20% in the woven fabric width direction (weft direction).

≪Physical characteristic evaluation≫
Next, the physical characteristics of the obtained stretch triple gauze-like woven fabric were evaluated. As evaluation items, the apparent count of the warp and weft and the apparent twist coefficient were calculated. Next, in order to evaluate the stretchability, the elongation elastic modulus (elongation rate and elongation recovery rate) under a constant load was evaluated. In addition, in this Example 2, the evaluation by the monitor test about the comfort as a pajamas use was not performed.

1. 1. Apparent count and apparent twist coefficient First, the apparent count and apparent twist coefficient of the warp and weft after the liquid ammonia treatment were calculated. As described above, in the second embodiment, the liquid ammonia treatment hardly shrinks in the length direction (warp and weft direction) of the woven fabric, and shrinks by about 20% in the woven fabric width direction (weft direction). Therefore, the apparent count and the apparent twist coefficient were calculated in the same manner as in the first embodiment. Table 4 shows the count and twist coefficient before shrinkage and the apparent count and apparent twist coefficient after shrinkage for the warp and weft of the woven fabric of each layer.

In Table 4, all of the first outer layer woven fabric (front surface woven fabric), the inner layer woven fabric, and the second outer layer woven fabric (back surface woven fabric) have a thicker apparent count due to the shrinkage of the warp and weft by 20%. In addition, the apparent twist coefficient of the weft calculated by using the number of twists increased by 20% of the weft and the apparent count is also large. However, as for the surface woven fabric, since untwisted yarn is used for the weft, the apparent twist coefficient is not calculated.

Although the apparent twist coefficient of the weft of the surface woven fabric was not calculated, it is considered that it contributes to the softness of the texture of the surface woven fabric even after shrinkage because the non-twisted yarn is used. On the other hand, the apparent twist coefficient of the inner layer woven fabric and the back surface woven weft has reached a strong twist of 5.6, which is considered to exhibit strong stretchability.

The elongation elastic modulus (elongation rate and elongation recovery rate) was measured in the same manner as in Example 1 above, and good results were obtained as well. The evaluation result is omitted here. In addition, in this Example 2, the evaluation by the monitor test about the comfort as a pajamas application was not performed. In addition, various physical characteristics (water absorption, heat retention, breathability) for pajamas were also evaluated, and these physical characteristics were also good and had the same comfort as the conventional multi-layer gauze fabric. Further, the pajamas sewn with the stretch triple gauze-like woven fabric according to the second embodiment were repeatedly washed at home, but the appearance was not spoiled due to the shape loss and the generation of pills.

As described above, according to the present invention, the present invention has the same comfort as a conventional multi-layer gauze woven fabric, realizes a comfortable fit due to stretchability, and spoils the aesthetic appearance due to shape loss and generation of pills. It is possible to provide a stretch multi-layer woven fabric that can be used as practical clothing without being damaged.

In carrying out the present invention, not only the above-described embodiment and each embodiment but also various modifications as follows can be mentioned.
(1) In each of the above examples, a sweet twisted yarn having a small twisting coefficient before shrinkage was used only for the warp and weft of the surface woven fabric. However, the present invention is not limited to this, and depending on the application, the sweet twisted yarn may be used only for the weft of the back surface woven fabric.
(2) In each of the above examples, a sweet twisted yarn having a small twisting coefficient before shrinkage was used only for one of the two outer layer woven fabrics. However, the present invention is not limited to this, and depending on the application, sweet twisted yarn may be used for both wefts of the two outer layer woven fabrics.
(3) In each of the above examples, a triple woven fabric having one inner layer woven fabric was produced. However, the present invention is not limited to this, and depending on the application, a multi-layer woven fabric using a plurality of inner layer woven fabrics may be produced. In this case, the warp and weft of two or more inner layer woven fabrics may be used with a yarn having a large twist coefficient before shrinkage and having a normal twist or more to enhance the stretchability.

The present invention relates to a stretch multi-layer woven fabric and a method for producing the same. In particular, the present invention relates to a stretch multiple woven fabric and a method for producing the same, which is characterized by having excellent stretchability even if the multiple woven fabric is a gauze-like coarse plain woven fabric.

Therefore, in response to the above, the present invention has the same comfort as the conventional multiple gauze woven fabric, realizes a comfortable fit due to stretchability, and is aesthetically pleasing due to the shape loss and the generation of pills. It is an object of the present invention to provide a stretch multi-layer woven fabric that can be used as practical clothing without being damaged and a method for producing the same.

That is, according to the description of claim 1, the stretch multiple woven fabric according to the present invention is described.
A multi-layered fabric in which three or more cotton fabrics are knotted by warp and / or weft.
The multi-layer woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer, and these outer layer woven fabrics and inner layer woven fabrics are both plain weave gauze-like woven fabrics. There,
It has stretchability in the width direction of the woven fabric without containing elastic fibers, and the value of the elongation rate when a load of [(7.35 N / 50 mm width) x 60 minutes] is applied is 10% or more, and the load is released. It is characterized in that the value of the elongation recovery rate after 24 hours has passed is 60% or more.
Further, according to the description of claim 4, the method for producing a stretch multiple woven fabric according to the present invention is described.
Three or more cotton fabrics are knotted by warps and / or wefts, and the two outer layer fabrics constituting the outer layer and the one or more inner layer fabrics constituting the inner layer are both plain weave gauze-like fabrics. By weaving a multi-woven fabric and applying liquid ammonia treatment to the multi-woven fabric after weaving,
The multiple woven fabric after the liquid ammonia treatment has stretchability in the woven fabric width direction without containing elastic fibers, and has an elongation rate when a load of [(7.35 N / 50 mm width) × 60 minutes] is applied. The value is 10% or more, and the value of the elongation recovery rate when 24 hours have passed after the load is released is 60% or more.

Further, according to claim 5 , the present invention is the method for producing a stretch multiple woven fabric according to claim 4 .
The liquid ammonia treatment is characterized in that the woven fabric width of the multiple woven fabric is shrunk by 15% or more.

Further, according to the second aspect of the present invention, the stretch multiplex fabric according to the first aspect of the present invention.
In both outer layer fabrics of the two outer layer fabrics, the apparent twist coefficient of the warp is 3.5 or more, and the apparent twist coefficient of the weft is less than 3.5.
In the one or more inner layer woven fabrics, the apparent twist coefficient of the warp is 3.5 or more, and the apparent twist coefficient of the weft is 4.0 or more.

Further, according to the sixth aspect of the present invention, the method for producing a stretch multiplex woven fabric according to the fourth or fifth aspect.
In both outer layer woven fabrics of the two outer layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp and weft is 3.0 or less, and the warp after the liquid ammonia treatment. The apparent twist coefficient of the weft is 3.5 or more, and the apparent twist coefficient of the weft is 3.1 or more.
In the one or more inner layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp is 3.5 or more, and the appearance of the warp after the liquid ammonia treatment is The twist coefficient of the weft is 3.5 or more, and the apparent twist coefficient of the weft is 4.0 or more.

Further, according to the third aspect of the present invention, the stretch multiplex fabric according to the first aspect of the present invention.
In one of the two outer layer woven fabrics, the apparent twist coefficient of the warp is 3.5 or more, and the apparent twist coefficient of the weft is less than 3.5.
In the other outer woven fabric of the two outer woven fabrics, the apparent twist coefficient of the warp is 3.5 or more, and the apparent twist coefficient of the weft is 4.0 or more.
In the one or more inner layer woven fabrics, the apparent twist coefficient of the warp is 3.5 or more, and the apparent twist coefficient of the weft is 4.0 or more.

Further, according to claim 7 , the present invention is the method for producing a stretch multiple woven fabric according to claim 4 or 5 .
In one of the two outer layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp and weft is 3.0 or less, and after the liquid ammonia treatment. The apparent twist coefficient of the warp is 3.5 or more, and the apparent twist coefficient of the warp is 3.1 or more.
In the other outer layer woven fabric of the two outer layer woven fabrics, the twist coefficient of the warp yarn before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp and weft is 3.5 or more, and after the liquid ammonia treatment. The apparent twist coefficient of the warp is 3.5 or more, and the apparent twist coefficient of the warp is 4.0 or more.
In the one or more inner layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp is 3.5 or more, and the appearance of the warp after the liquid ammonia treatment is The twist coefficient of the weft is 3.5 or more, and the apparent twist coefficient of the weft is 4.0 or more.

As described above, according to the present invention, the present invention has the same comfort as a conventional multi-layer gauze woven fabric, realizes a comfortable fit due to stretchability, and spoils the aesthetic appearance due to shape loss and generation of pills. It is possible to provide a stretch multi-layer woven fabric that can be used as practical clothing and a method for producing the same.

Claims (7)

A multi-layered fabric in which three or more cotton fabrics are knotted by warp and / or weft.
Liquid ammonia treatment is applied after weaving,
It has stretchability in the width direction of the woven fabric without containing elastic fibers, and the value of the elongation rate when a load of [(7.35 N / 50 mm width) x 60 minutes] is applied is 10% or more, and the load is released. A stretch multi-layer woven fabric characterized in that the value of the elongation recovery rate after 24 hours has passed is 60% or more. The stretch multiple woven fabric according to claim 1, wherein the woven fabric width of the multiple woven fabric is shrunk by 15% or more in the liquid ammonia treatment. The multiple woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer.
In both outer layer fabrics of the two outer layer fabrics, the apparent twist coefficient of the warp yarn after the liquid ammonia treatment is 3.5 or more, and the apparent twist coefficient of the warp yarn is less than 3.5.
Claim 1 is characterized in that, in the one or a plurality of inner layer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment is 3.5 or more, and the apparent twist coefficient of the warp is 4.0 or more. Or the stretch multiple woven fabric according to 2. The multiple woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer.
In both outer layer woven fabrics of the two outer layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp and weft is 3.0 or less, and the warp after the liquid ammonia treatment. The apparent twist coefficient of the weft is 3.5 or more, and the apparent twist coefficient of the weft is 3.1 or more.
In the one or more inner layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp is 3.5 or more, and the appearance of the warp after the liquid ammonia treatment is The stretch multiple woven fabric according to claim 1 or 2, wherein the twist coefficient of the woven fabric is 3.5 or more, and the apparent twist coefficient of the warp and weft is 4.0 or more. The multiple woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer.
In one of the two outer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment is 3.5 or more, and the apparent twist coefficient of the warp is less than 3.5.
In the other outer woven fabric of the two outer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment is 3.5 or more, and the apparent twist coefficient of the warp is 4.0 or more.
Claim 1 is characterized in that, in the one or a plurality of inner layer woven fabrics, the apparent twist coefficient of the warp after the liquid ammonia treatment is 3.5 or more, and the apparent twist coefficient of the warp is 4.0 or more. Or the stretch multiple woven fabric according to 2. The multiple woven fabric is composed of two outer layer woven fabrics constituting the outer layer and one or more inner layer woven fabrics constituting the inner layer.
In one of the two outer layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp and weft is 3.0 or less, and after the liquid ammonia treatment. The apparent twist coefficient of the warp is 3.5 or more, and the apparent twist coefficient of the warp is 3.1 or more.
In the other outer layer woven fabric of the two outer layer woven fabrics, the twist coefficient of the warp yarn before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp and weft is 3.5 or more, and after the liquid ammonia treatment. The apparent twist coefficient of the warp is 3.5 or more, and the apparent twist coefficient of the warp is 4.0 or more.
In the one or more inner layer woven fabrics, the twist coefficient of the warp before the liquid ammonia treatment is 3.5 or more, the twist coefficient of the warp is 3.5 or more, and the appearance of the warp after the liquid ammonia treatment is The stretch multiple woven fabric according to claim 1 or 2, wherein the twist coefficient of the woven fabric is 3.5 or more, and the apparent twist coefficient of the warp and weft is 4.0 or more. The invention according to any one of claims 3 to 6, wherein the two outer layer woven fabrics and the one or more inner layer woven fabrics constituting the multiple woven fabric are both plain weave gauze-like woven fabrics. Stretch multiple woven fabric.

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