JP2024051962A - Textile products - Google Patents

Abstract

[Problem] To provide a woven product in which the stretchability of the fabric is actively suppressed. [Solution] The woven product in this embodiment comprises a woven fabric 20 including stretchable warp threads 22 and weft threads 21 that are more stretchable than the warp threads 22, and formed by weaving, and a garment body 10 including at least a portion of the woven fabric 20. The woven fabric 20 includes weft threads 21 and warp threads 22 with finenesses of 33 dtex to 672 dtex, and the cover factor of the grey fabric before it is made into the woven fabric 20 is 1400 to 1750 in terms of plain weave fabric. The garment body 10 is characterized in that the woven fabric 20 is provided over an area of 50% or more of the entire garment body 10. [Selected Figure] Figure 1

Description

The present invention relates to textile products.

For example, Patent Document 1 describes a stretchable woven fabric containing a polyester composite false-twist yarn, the polyester composite false-twist yarn containing a polyester conjugate yarn A having a single fiber fineness of 1.6 to 4.3 dtex and a polyester filament yarn B having a single fiber fineness of 0.2 to 1.1 dtex, and a protrusion of the polyester filament B is formed on the surface of the polyester composite false-twist yarn, the elongation rate in either the warp or weft direction measured by the method specified in "b) Method B (Constant Load Method for Woven Fabrics)" of "8.16.1 Elongation Rate" of "JIS L1096:2010 Fabric Test Methods for Woven Fabrics" is 5% or more, and the elongation rate in either the warp or weft direction measured by the method specified in "b) Method B-1 (Constant Load Method)" of "8.16.2 Elongation Modulus (Elongation Recovery Rate) and Residual Strain Rate" of "JIS L1096:2010 Fabric Test Methods for Woven Fabrics" is 10% or more. The paper discloses a stretchable woven fabric that has a stretch recovery rate of 80% or more in either the warp or weft direction, measured at 1000 mm/s (set at 1000 mm/s).

JP 2020-186503 A

The present invention aims to provide a textile product that actively suppresses the stretchability of the fabric.

The woven fabric product of the present invention includes a woven fabric that includes a first elastic yarn and a second elastic yarn that is more elastic than the first yarn, and a garment body that includes at least a portion of the woven fabric, the woven fabric including the first yarn and the second yarn with a fineness of 33 dtex or more and 672 dtex or less, the cover factor of the grey fabric before it is made into the woven fabric is 1400 or more and 1750 or less in terms of plain weave fabric, and the woven fabric is provided over an area of 50% or more of the entire garment body.

Preferably, the thickness of the second thread is the same as or thicker than the first thread, the second thread is a conjugate yarn containing polybutylene terephthalate fiber, and the woven fabric is provided over an area of 80% or more of the entire garment body.

Preferably, the second yarn is a conjugate yarn made of polybutylene terephthalate fibers and polyethylene terephthalate fibers.

The present invention makes it possible to actively suppress the stretchability of the fabric.

1 is a diagram illustrating a garment 1 according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the crystal structure of a fiber. FIG. 2 is a diagram illustrating the physical properties of fibers. FIG. 2 is a diagram illustrating the configuration of woven fabrics in Examples and Comparative Examples. FIG. 2 is a diagram illustrating the configuration of a woven fabric of a test specimen. FIG. 1 is a diagram illustrating the relationship between stresses during elongation in the woven fabrics of the examples and comparative examples. FIG. 13 is a diagram illustrating the relationship between stresses at each elongation in a woven fabric test specimen. FIG. 2 is a diagram illustrating stress-strain curves for an example, a comparative example, and a test specimen.

First, the background of the present invention will be described.
Due to the COVID-19 pandemic, in order to prevent the spread of infection, people are being asked to refrain from going out for non-essential reasons, and as a result, opportunities to go out have decreased and opportunities to stay at home have increased. For example, in social activities, the introduction of telework (a flexible way of working that makes effective use of time and place using information and communication technology (ICT)) is being recommended, and there is a trend toward the introduction of full-day or partial teleworking, allowing people to choose from a variety of work styles. As a result, there are fewer opportunities to wear a suit to work, and more opportunities to work from home, which has led to an increase in demand for innerwear.
In addition, currently, innerwear is often made of knitted fabrics, and innerwear is mainly made of knitted fabrics such as jerseys or pajamas, or circular knitted materials, and the knitted structure is such that the loops of the stitches extend and the yarns expand and contract, so that a loose and relaxed feeling can be felt. As prior art of this type, knits containing polyurethane elastic yarns and knit materials containing conjugate yarns have been proposed. As for knits containing polyurethane elastic yarns, they are hydrolyzable and have a short product life of about three years, so they are not sustainable from the perspective of long-term wear and the recent trend of SDGs (Sustainable Development Goals). In addition, as for knit materials containing conjugate yarns, they have the disadvantage of being heavier in terms of basis weight compared to woven fabrics, so there is a demand these days for materials that are lighter and provide a more relaxed feeling.

On the other hand, if the innerwear is made of woven fabric, the warp and weft threads are interwoven and constrained, so even if the fabric can be stretched, it returns quickly and is tight, making it difficult to experience the looseness and relaxation of knitted fabrics. In addition, stretch woven fabrics, warp stretch, weft stretch, and warp stretch are common, but most materials and products focus on the stretch recovery rate and stretch direction, and although there are materials and products that are defined as knit substitutes because of their stretch, there are no woven materials or products that define a relaxed feel by stretching with a weak force and returning to its original state. In order to create a loose and relaxed feel, the density of the fabric is reduced to the limit, and even if the yarn and processing are configured, the stretch recovery rate is poor, and the seam slippage resistance value is outside the fiber physical property standards. Therefore, the above circumstances were taken into consideration when creating an embodiment of the present invention. According to an embodiment of the present invention, by combining weaving, processing, and sewing techniques, it is possible to create a stretch fabric that combines the looseness and relaxed feel of knitwear with stretchability, stretches with a weak force in the weft direction, and slowly returns to its pre-stretch state.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the scope of the present invention is not limited to the illustrated examples.
First, the configuration of the garment 1 of the embodiment will be described.
FIG. 1 is a diagram illustrating a garment 1 according to the present embodiment.
1, a garment 1 in this embodiment is an example of a textile product according to the present invention, and is, for example, clothing such as bottoms, jackets, sets, or shirting, sportswear, coats, blousons, blouses, skirts, etc., and in this example, is a jacket. The garment 1 includes a garment body 10 and a textile fabric 20.
The clothing body 10 is a clothing body that includes at least a portion of a woven fabric 20 (described below). The clothing body 10 is provided with the woven fabric 20 over at least 50% of the entire clothing body 10, specifically over at least 80% of the entire clothing body 10. Note that the clothing body 10 of this example is entirely formed from the woven fabric 20. The clothing body 10 is one example of a clothing body in the present invention.

The woven fabric 20 (hereinafter sometimes referred to as woven fabric 20) is a fabric including weft threads 21 and warp threads 22, and the woven fabric 20 in this example is a fabric formed by weaving the weft threads 21 and warp threads 22. The details of the weft threads 21 and the warp threads 22 will be described later. The woven fabric 20 is, for example, a plain weave, a twill weave, a satin weave, a double weave, a matte weave, or a satin weave. The garment body 10 in this example is a plain weave. The woven fabric 20 forms each part (woven fabric piece) of the garment body 10.

The garment body 10 is made by sewing together each part (woven fabric piece) made of woven fabric 20 with sewing thread. The sewing thread is a thread that is stretchable enough to match the stretchability of the woven fabric 20, such as a Regilon thread. The sewing thread is not limited to Regilon thread, and any other substitutable thread may be used as long as it is a thread that is resistant to thread breakage and is specifically designed for stretch fabrics.

FIG. 2 is a diagram illustrating the crystal structure of the fiber.
FIG. 3 is a diagram illustrating the physical properties of the fiber, where FIG. 3(A) is a table showing the physical properties of the fiber, and FIG. 3(B) is a graph showing the elongation recovery of the fiber.
The woven fabric 20 includes weft threads 21, warp threads 22, and a fabric body 23. The fabric body 23 is present in at least a portion of the woven fabric 20, and is formed by weaving the weft threads 21 and the warp threads 22. The fabric body 23 in this example is provided throughout the woven fabric 20, and substantially constitutes the woven fabric 20.
(Woven fabric 20: weft thread 21)
The weft threads 21 included in the fabric body 23 are threads that stretch in the same manner as the warp threads 22 or threads that are more elastic than the warp threads 22. In this example, the weft threads 21 are threads that are more elastic than the warp threads 22.
The weft yarn 21 is a conjugate yarn containing at least one of PBT (polybutylene terephthalate) fiber, PTT (polytrimethylene terephthalate) fiber, PU (polyurethane) fiber, or PET (polyethylene terephthalate) fiber. The weft yarn in this example is a conjugate yarn containing PBT fiber, specifically, a conjugate yarn formed of PBT fiber and PET fiber. The weft yarn 21 is an example of a second yarn according to the present invention.
As shown in Fig. 2, PET fiber, PTT fiber, and PBT fiber are fibers belonging to polyalkylene terephthalate. PET fiber has two methylene groups of alkylene chains, PTT fiber has three methylene groups of alkylene chains, and PBT fiber has four methylene groups of alkylene chains. The unique properties of each fiber are often determined by the crystal structure.
As shown in Fig. 3, the table [Fig. 3(A)] showing the physical properties of the fibers has the following columns for the physical properties of the fibers: "tensile strength", "elongation", "elastic modulus", "20% elongation recovery", "specific gravity", "water content", "boiling water shrinkage", "melting point", "weather resistance", and "yellowing resistance", and the following rows for the types of fibers: "PTT fiber (PTT)", "PET fiber (PET)", "PBT fiber (PBT)", and "nylon 6". In the 20% elongation recovery category, the PBT fiber has a higher elongation recovery than the PET fiber and nylon 6, and a lower elongation recovery than the PTT fiber. In the crystalline modulus category, the PBT fiber has a lower modulus than the PET fiber, and is roughly equivalent in modulus to the PTT fiber. The glove showing the elongation recovery of fibers [Fig. 3(B)] shows the elongation recovery rate when various fibers are elongated by a certain amount, with the elongation recovery rate on the vertical axis and the elongation rate on the horizontal axis. At a fiber elongation of 20% and a fiber elongation of 30%, PBT fiber shows lower elongation recovery than PTT fiber and nylon 6, and higher elongation recovery than PET fiber. From these, PBT fiber is a fiber that elongates with a weaker force than PTT fiber and nylon 6 due to its fiber characteristics, and is a relatively soft fiber. In other words, the woven fabric 20 forming the garment body 10 is easy to elongate in the weft direction, resulting in a sense of relaxation.

(Woven fabric 20: warp thread 22)
The warp threads 22 included in the fabric main body 23 are elastic threads and are less elastic than the weft threads 21. The warp threads 22 are, for example, synthetic fibers or natural fibers. The warp threads 22 are, for example, polyester fibers (PET fibers), nylon (polyamide), cotton, etc. Note that the warp threads 22 are not limited to synthetic fibers and natural fibers.
From the viewpoint of compatibility of the fiber selected for the weft yarn 21 and dyeing efficiency, for example, a polyester-based fiber is used. The warp yarn 22 in this example is a PET fiber, which is a polymer material for polyester-based fibers. The warp yarn 22 is an example of the first yarn according to the present invention.

(Fineness)
Regarding the fineness of the weft yarn 21 and the warp yarn 22 of the woven fabric 20 forming the garment body 10, the thickness of the weft yarn 21 is the same as or thicker than the warp yarn 22. The fineness of the weft yarn 21 is 33 dtex (decitex) or more and 672 dtex or less, specifically 33 dtex or more and 585 dtex or less, and more specifically 80 dtex or more and 252 dtex or less. The fineness of the warp yarn 22 is 33 dtex (decitex) or more and 672 dtex or less, specifically 33 dtex or more and 585 dtex or less, and more specifically 70 dtex or more and 252 dtex or less. In Example 1 described later, the fineness of the weft yarn is 84 dtex, and the fineness of the warp yarn is 72 dtex. The weft and warp yarns in Example 2 have the same thickness and a fineness of 84 dtex. In order to satisfy good stretchability and mechanical properties, and to ensure texture and high productivity as a clothing textile, the fineness of the weft yarn 21 and the warp yarn 22 is preferably 33 dtex or more and 672 dtex or less.

(Cover factor)
In the state before becoming the woven fabric 20, specifically, in the state before dyeing and finishing processing, the cover factor CF of the grey fabric is 1400 or more and 1750 or less, calculated as a plain weave fabric. From the viewpoint of obtaining good mechanical properties such as seam slippage resistance and stretchability, the cover factor CF is preferably 1400 or more and 1750 or less, calculated as a plain weave fabric. The cover factor CF of the grey fabric is calculated by the following formula.

In this formula 1, DWp is the warp thickness [dtex], MWp is the warp weave density [pieces/2.54 cm], DWf is the weft thickness [dtex], and MWf is the weft weave density [pieces/2.54 cm].

(Fabric characteristics of woven fabric 20)
The fabric 20 forming the garment body 10 has a tear strength of, for example, 8 N (Newtons) or more, more preferably 15 N or more, as measured by JIS L1096:2010 D method (pendulum method). If the tear strength is 15 N or more, it can withstand harsh use such as sports use and is extremely useful in practical use. If the tear strength is less than 8 N, it is likely to break in a living environment.
The fabric 20 forming the garment body 10 was subjected to measurement of resistance to slippage (slippage resistance) of the seams according to JIS L1096:2010 seam slippage method (Method B). A seam sewn in a specified manner was pinched and a constant load was applied to both ends, after which the size of the maximum hole that could be made in the seam to prevent slippage (slippage resistance value) was measured. Note that, in the case of thick fabrics, a load of 117.7 is usually applied to determine the physical properties of the fabric.
For thin fabrics, a tensile load of 49.0 N is applied to measure the slippage resistance. For example, a tensile load of 49 N is normally applied to a woven shirt product with a weight of 140 g/ ^m2 or less, but in this embodiment, a tensile load of 117.7 N is applied to all fabrics for measurement. In identifying the physical properties of the woven fabric 20 in this example, a tensile load of 117.7 N is applied to measure the slippage resistance.
The slippage resistance value of the fabric 20 is, for example, 3 mm or less, and preferably 1 mm or less. If the slippage resistance value exceeds 3 mm, the fabric 20 is likely to slip off when worn or washed, making it less practical to use and limiting the types of clothing that can be used.

Next, a method for manufacturing the garment 1 of the embodiment will be described.
In step 100 (S100), a manufacturing worker (hereinafter, worker) uses a loom to weave a plain weave fabric that will become the fabric of the garment body 10 (weaving process). The worker weaves a grey fabric with a weft yarn 21 that is a conjugate yarn containing PBT fiber and a warp yarn 22 that is a PET fiber. The cover factor CF of the grey fabric to be woven is 1400 or more and 1750 or less in terms of plain weave fabric.

In step 102 (S102), the worker performs at least one of the following processes on the woven grey fabric before dyeing: singeing, desizing, scouring, bleaching, alkali weight reduction, mercerizing, shrink-proofing, and presetting (preparation process). In this example, the worker selects desizing, scouring, and presetting, and performs the preparation process in the order of desizing, scouring, and presetting. Note that, from the viewpoint of maintaining the stretchability of the grey fabric, presetting is performed at, for example, 160°C or higher and 190°C or lower. Note that if presetting is performed at a high temperature, for example, exceeding 170°C, immediately after scouring, PBT fibers and PET fibers, which are thermoplastic fibers, will shrink and deform, and will not shrink in the subsequent wet heat process, resulting in loss of stretchability.
In the selection of the preparation step, the alkaline weight reduction process may not be performed or may be performed as necessary, from the viewpoint that the yarn fineness is reduced by hydrolysis of the PBT fiber and the PET fiber, and the void ratio (cover factor) changes. However, from the viewpoint of maintaining the fabric characteristics, in the case of a woven fabric having a fineness of 84 dtex or less, the alkaline weight reduction process is not preferable because the tear strength and slippage resistance value are reduced by hydrolysis caused by the alkaline weight reduction process.

In step 104 (S105), the worker dyes the prepared grey fabric with dyes such as acid dyes, disperse dyes, reactive dyes, or cationic dyes, by yarn dyeing, solid dyeing (batch type), solid dyeing (continuous type, textile printing, or product dyeing) to achieve the desired color scheme (dyeing process).

In step 106 (S106), the worker subjects the dyed and wet grey fabric to a wet heat setting process at 160°C or less. In this example, the setting process is performed at a temperature of 150°C or more for 30 to 60 seconds. This heat sets the warp and weft threads of the grey fabric, eliminating distortion in the fabric.

In step 108 (S108), the worker forms a coating on the greige fibers using a finishing agent after the setting process (finishing process). This improves the texture of the greige, changes the appearance, and imparts functionality to the greige. In forming the coating, it is preferable to use a finishing agent that does not damage the texture of the greige or that does not affect the bending of the yarn, in order to avoid impairing the texture and stretchability of the greige. For example, finishing agents that form thin coatings such as self-crosslinking acrylic emulsion, which is the main component of hard finishing agents, or water-soluble acrylic resin, or water-soluble polyacrylamide resin or water-soluble polyester resin are not preferable because they increase the binding force of the yarn and suppress stretchability.

In step 110 (S110), the worker cuts each part from the woven fabric 20 and sews the cut pieces of woven fabric together with a sewing machine to obtain the garment 1. The worker sews each piece of woven fabric while adjusting the tension of the Regilon thread and appropriately changing the thread tension of the sewing machine according to the stretchability of the woven fabric 20. When adjusting the tension of the Regilon thread, the worker sews with as low a tension as possible, since adjusting the tension of the Regilon thread can cause the stitches to be spaced too far apart or cause a puncture (thread coming loose). In addition, if the garment 1 is a pair of bottoms (pants), tension pressure is applied to the fabric, especially in the area near the buttocks, when it is worn, so adjusting the tension of the Regilon thread is important.

Next, examples based on the above embodiment will be described.
FIG. 4 is a diagram illustrating the configuration of the woven fabric of the examples and the comparative examples.
[Example 1]
As shown in Fig. 4, the woven fabric of Example 1 (hereinafter, Example 1) was woven by crossing one warp thread of PET fiber having a thickness of 72 dtex with one weft thread of conjugate yarn composed of PBT/PET fiber having a thickness of 84 dtex with each other to produce a plain weave fabric with a warp density of 99 threads/2.54 cm and a weft density of 80 threads/2.54 cm. Next, the preparation process, dyeing process, heat setting process, and finishing process were performed according to the above-mentioned manufacturing method to obtain an outerwear fabric with a warp density of 147 threads/2.54 cm and a weft density of 88 threads/2.54 cm.

[Example 2]
As shown in Fig. 4, the woven fabric of Example 2 (hereinafter, Example 2) was woven by crossing a warp yarn of PET fiber having a thickness of 84 dtex with a weft yarn of a conjugate yarn composed of PTT/PET fiber having a thickness of 84 dtex to produce a 2/2 twill fabric with a warp density of 134/2.54 cm and a weft density of 105/2.54 cm. Next, the preparation process, dyeing process, heat setting process, and finishing process were performed according to the above-mentioned manufacturing method to obtain an outerwear fabric with a warp density of 205/2.54 cm and a weft density of 124/2.54 cm.

[Comparative Example 1]
As shown in Fig. 4, the woven fabric of Comparative Example 1 (hereinafter, Comparative Example 1) was woven by crossing one warp thread of PET fiber having a thickness of 72 dtex with one weft thread of conjugate yarn composed of PTT/PET fiber having a thickness of 84 dtex with each other to produce a plain weave fabric with a warp density of 128 threads/2.54 cm and a weft density of 86 threads/2.54 cm. Next, the preparation process, dyeing process, heat setting process, and finishing process were performed according to the above-mentioned manufacturing method to obtain an outerwear fabric with a warp density of 174 threads/2.54 cm and a weft density of 95 threads/2.54 cm.

[Comparative Example 2]
As shown in Fig. 4, the woven fabric of Comparative Example 2 (hereinafter, Comparative Example 2) was woven by crossing a warp yarn of PET fiber having a thickness of 84 dtex with a weft yarn of a conjugate yarn composed of PTT/PET fiber having a thickness of 84 dtex, and weaving a 2/2 twill fabric with a warp density of 134/2.54 cm and a weft density of 105/2.54 cm. Next, the preparation process, dyeing process, heat setting process, and finishing process were performed according to the above-mentioned manufacturing method to obtain an outer woven fabric with a warp density of 205/2.54 cm and a weft density of 124/2.54 cm. As the finishing process, a self-crosslinking acrylic emulsion and a water-soluble acrylic resin were used, and the finishing process was performed at 160 ° C. for 1 minute using a finishing agent that forms a coating.

[Other test specimens]
In addition to the examples and comparative examples, the test specimens are woven fabrics of Tests 1 to 46 (hereinafter, Tests 1 to 46). Among them, the configurations of the woven fabrics of Tests 1 to 9, Tests 11 to 16, and Test 46 are exemplified.
FIG. 5 is a diagram illustrating the configuration of the woven fabric of the test specimen.
As shown in FIG. 5, the fabrics are based on the conditions described in the items of the weave, warp, weft, and grey cover factor in Tests 1 to 9, 11 to 16, and 46.
The physical properties of each of the woven fabrics of the Examples, Comparative Examples, and Test Specimens (Tests 1 to 46) were evaluated according to the following items.

[Evaluation criteria for characteristics]
In evaluating the properties of each woven fabric (hereinafter referred to as woven fabric) in the above Examples and Comparative Examples, the fineness, cover factor, tear strength, slippage resistance, tensile elongation, and elongation recovery rate were determined according to the following standards.
(Fineness)
The fineness is measured according to the measurement method of JIS L-1013 (2010) 8.3.1 Method A, and the measured value is the fineness [dtex] of the warp and weft yarns.
(Cover factor)
The cover factor CF of the green fabric can be calculated by the above-mentioned formula 1.
The density was determined according to JIS L-1096 (2010) 8.6.1 A method by sampling five different locations of the fabric, enlarging the surface of the sample by 20 times using a Shimadzu stereo microscope, counting the number of fibers per 2.54 cm, calculating the average value as the unit length, and rounding to one decimal place. The cover factor CF for the fabric was calculated by converting all the fabrics into numerical values for a plain weave fabric.

(Tear strength)
The tear strength (N) of each of the woven fabrics in the above Examples and Comparative Examples was measured according to JIS L-1096 (2010) 8.17 Tear Strength 8.17.4D method (Pendulum method), and the tear strength of the woven fabric in the warp direction and the weft direction were measured. Each measurement was performed five times, and the arithmetic average value was calculated based on the measurement results.

(Slip resistance)
The slippage resistance of each of the woven fabrics in the above examples and comparative examples was measured in accordance with JIS L1096 (2010) 8.23.1 Seam slippage method (Method B) for slippage resistance, and the maximum hole size of seam slippage under a load of 117.0 N was measured in 0.1 mm units in both the warp and weft directions of the fabric. Each measurement was performed five times, and the arithmetic average value was calculated based on the measurement results.

(Tensile elongation: SS curve (stress-strain curve))
Regarding the relationship between tensile strength and elongation (hereinafter sometimes referred to as elongation) in each of the woven fabrics in the above Examples and Comparative Examples, the magnitude of the stress when the fabric was stretched (i.e., tensile strength) was measured in the weft direction of the woven fabric in units of 0.1 N according to JIS L-1096: Strip (Method A) when the elongation rate was 10%, 20%, and 30% from the standard state (unstretched state). The measurement was performed three times, and the arithmetic average value was calculated based on the measurement results.

(Elongation rate/Elongation rate)
Regarding the elongation rate of each of the woven fabrics in the above Examples and Comparative Examples, "According to JIS L 1096, Fabric Testing Method for Woven and Knit Fabrics (Method B) (Constant Load Method), three test pieces, each 50 mm wide and 300 mm long, were prepared in the warp and weft directions, and set in a tensile testing machine or a device with equivalent performance so that the entire width was grasped. Then, marks were made at 200 mm intervals (L0), a load of 14.7 N was applied, and the length between the marks (L1) after holding for one minute was measured. From these, the elongation rate (%) was calculated by the following formula:

(Elongation recovery rate)
The elongation recovery rate of each of the woven fabrics in the above examples and comparative examples is based on "JIS L According to the 1096 woven and knitted fabric test method (B-1 method) (constant load method), three test pieces with a width of 50 mm and a length of 300 mm are prepared in the vertical and horizontal directions, and set in a tensile tester or a device with equivalent performance so as to grip the entire width direction. After setting the test piece in the tensile tester, marks are made on the set test piece at 200 mm intervals (L0) and a tensile load of 14.7 N is applied. After holding the test piece with a load applied for 1 hour, the length between the marks (L1) is measured, and after removing the load from the test piece, the initial load (14.7 N) is applied to the test piece again after 30 seconds or 1 hour (60 minutes) to measure the length between the marks (L2). Then, based on the measurement results, the elongation recovery rate (%) when the load is applied again after 30 seconds and the elongation recovery rate (%) when the load is applied again after 60 minutes were calculated. The elongation recovery rate (%) is calculated by the following formula.

[Measurement of stretchability]
FIG. 6 is a diagram illustrating the relationship between stresses at each elongation in the woven fabrics of the examples and the comparative examples.
As shown in Fig. 6, the arithmetic mean value was calculated from the measurement results for the relationship of stress between the examples and the comparative examples. In the example 1, the tensile strength was 3.97 N when the elongation rate was 10%, 7.9 N when the elongation rate was 20%, and 15.48 N when the elongation rate was 30%. In the comparative example 1, the tensile strength was 8.25 N when the elongation rate was 10%, 17.6 N when the elongation rate was 20%, and 37.82 N when the elongation rate was 30%.
In addition, in Example 2, the tensile strength is 3.5 N when the elongation rate is 10%, 7.53 N when the elongation rate is 20%, and 15.85 N when the elongation rate is 30%. In Comparative Example 2, the tensile strength is 4.78 N when the elongation rate is 10%, 10.9 N when the elongation rate is 20%, and 22.12 N when the elongation rate is 30%.

FIG. 7 is a diagram illustrating the relationship between stresses at each elongation in the woven fabric test specimen.
FIG. 8 is a diagram illustrating stress-strain curves for the examples, the comparative examples, and the test specimens.
As shown in Fig. 7, the arithmetic mean value was calculated from each measurement result for the relationship of stress in Tests 1 to 46. The tensile strengths applied at an elongation rate of 10%, 20%, and 30% in Tests 1 to 46 are shown. In addition, as shown in Fig. 8, SS curves were plotted for the examples, comparative examples, and Tests 1 to 46, with the tensile strength = stress [N] on the vertical axis and the strain [%] indicating the elongation rate on the horizontal axis.

[Evaluation of the physical properties]
(Tensile elongation)
As shown in Fig. 8, the tensile strength of the woven fabric 20 of this embodiment is, as a fabric property of JIS L1096, 20N or less when elongated by 30%, and preferably 10N or less when elongated by 20%. As shown in Figs. 6 to 8, it was confirmed that the tensile strength of Examples 1 and 2 is 20N or less when elongated by 30%, and 10N or less when elongated by 20%.
(Elongation rate/Elongation rate)
In terms of providing comfort when worn, the initial weft elongation rate of the woven fabric 20 of the present embodiment is desirably 15% or more. It was confirmed that the initial weft elongation rates of Examples 1 and 2 were 30% or more.
(Elongation recovery rate)
The elongation recovery rate of the woven fabric 20 of this embodiment is 80% or more, more preferably 85% or more, when a load is applied again after 60 minutes. It was confirmed that the elongation recovery rate of Examples 1 and 2 is 83% or more when a load is applied again after 60 minutes. It was also confirmed that the elongation recovery rate of Examples 1 and 2 is 74% or more when a load is applied again after 30 seconds.
[Tactile evaluation]
In the fabrics of Examples 1 and 2, when the fabrics are pulled and stretched in the weft direction, there is almost no resistance, so it is difficult to feel that the fabric is being stretched. However, when the pulling is completed and the pulling is released, there is a slight kickback. Only at this point can the user realize that the fabric has been stretched.

As described above, the woven fabric of the garment 1 in this embodiment stretches more easily in the weft direction than in the warp direction, and stretches with less force in the weft direction and does not return to its original shape easily, so that it can be used as an alternative fabric to knitwear and can provide a new wearing comfort. Furthermore, the mechanical properties of the woven fabric of the garment 1 in this embodiment are not impaired even after repeated washing, etc.
Although the embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications and additions can be made without departing from the spirit and scope of the invention.

Reference Signs List 1: garment 10: garment body 20: woven fabric 21: weft thread 22: warp thread 23: fabric body

Claims (3)

A woven fabric including a first elastic yarn and a second elastic yarn that is more elastic than the first yarn;
and a garment body including at least a portion of the woven fabric,
The woven fabric includes the first yarn and the second yarn having a fineness of 33 dtex or more and 672 dtex or less,
The cover factor of the green fabric before it is made into the woven fabric is 1400 or more and 1750 or less in terms of plain weave fabric,
A woven product, characterized in that the woven fabric is provided over an area of 50% or more of the entire garment body. The thickness of the second thread is the same as that of the first thread or is thicker than that of the first thread,
the second yarn is a conjugate yarn comprising polybutylene terephthalate fibers;
The textile product according to claim 1, wherein the woven material is provided over an area of 80% or more of the entire garment body. The textile product of claim 2 , wherein the second yarn is a bijugate yarn comprised of polybutylene terephthalate and polyethylene terephthalate fibers.

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