Breathable double-knit or interlock fabric made from a single-component material.

Abstract

The present invention relates to an elastic double-knit fabric or elastic interlock fabric that, compared to conventional elastic double-knit fabrics or elastic interlock fabrics made of spandex, improves breathability and is easy to recycle, while maintaining the fabric weight and the warp and weft elasticity characteristic of double-knit fabrics or interlock fabrics sold for the sportswear and underwear markets.

Description

Technical Field

[0001] The present invention relates to an elastic double-knit fabric or an elastic interlock fabric that improves air permeability and is easy to recycle while maintaining the fabric weight and the stretchability in the warp and weft directions specific to double-knit fabrics or interlock fabrics sold for sportswear and underwear markets, compared to conventional elastic double-knit fabrics or elastic interlock fabrics made of spandex.

Background Art

[0002] Woven fabrics are widely used in activewear because they can be easily deformed or stretched by compressing or stretching each stitch that forms the woven fabric and is composed of interconnected loops. This performance of stretching in all directions by rearranging stitches enhances the comfort of clothing made from the woven fabric, even when the woven fabric is made of 100% non-elastic yarns such as polyester, nylon, cotton, or wool. However, the resilience of such non-elastic yarns is not strong enough to rearrange the stitches after deformation. Therefore, a woven fabric made of 100% non-elastic yarns may experience permanent deformation or "loosening" at specific parts of clothing, such as the knee part of more stretchable trousers. To improve the recovery performance of the woven fabric, a method of co-weaving spandex and non-elastic yarns as accompanying yarns is commonly used. Spandex enhances the stretchability of the fabric and improves the resilience for shape retention and the comfort of the wearer of clothing made from such fabric.

[0003] Spandex fibers are usually stretched 200% to 500% and co-woven with non-elastic yarns. When the fabric is woven, the resilience from spandex helps maintain the structure of the stitches. However, spandex co-woven fabrics may be accompanied by an undesirable increase in bulk and density. This reduces air permeability and thus ventilation, which may result in a less comfortable fabric, and in some cases, the level of trapped moisture may increase.

[0004] Alternative manufacturing methods for stretch fabrics in the art that do not use spandex include the use of non-elastomer elastic yarns such as textured polyethylene terephthalate (PET) stretch filament yarn, textured PPT stretch filament yarn, T400 yarn (polyethylene terephthalate / polytrimethylene terephthalate (PET / PTT) parallel two-component), or polybutylene terephthalate (PBT) stretch yarn. However, the recovery power of such non-elastomer elastic yarns is often very low, often about 10-20% of that of spandex fibers of the same denier. Therefore, in order to produce a non-spandex stretch fabric with similar elasticity to a spandex stretch fabric, the content of non-elastomer elastic yarns in the non-spandex stretch fabric is usually at least 4-5 times higher than the spandex content in the spandex stretch fabric.

[0005] Compared to single-layer knitted fabrics, double-layer knitted fabrics are stiffer and more stable. This results in a softer feel, improved dimensional stability of garments, and enhanced abrasion resistance. Furthermore, the double-layer structure makes the fabric more opaque than single-layer knitted fabrics, effectively reducing the problem of "green-through" (see-through). However, the double-layer structure negatively impacts the fabric's breathability. In the case of elastic double-knit or elastic interlock fabrics with spandex, the fabric's breathability is affected by both the double-layer structure and the densifying effect of the spandex fibers.

[0006] Furthermore, when spandex is included in the structure of an elastic fabric, the fiber separation process during recycling at the time of disposal can become more complex. Therefore, there is a need for a fabric that maintains fabric weight, has elasticity and recovery similar to spandex fabric, has no reduction in breathability, and does not involve the complexity of including spandex fibers for the purpose of facilitating fiber separation for recyclability, while retaining the opacity advantages of a double-knit or interlock structure. [Overview of the Initiative]

[0007] As described above, there is a need to manufacture elastic double-knit or elastic interlock fabrics that have similar weight and elasticity to spandex-containing elastic double-knit or elastic interlock fabrics, but with good breathability. Ideally, these knits would be useful for activewear and, but are not limited to, innerwear such as bras, underwear, shapewear, camisoles, leggings, and sports bras.

[0008] A first aspect of the present invention is a double-knit or interlock fabric having one non-elastomer elastic yarn and one non-elastic yarn knitted with a dial needle to form one layer of the knitted fabric, and one non-elastomer elastic yarn and one non-elastic yarn knitted with a cylinder needle to form the other layer of the knitted fabric. One non-elastomer elastic yarn is also used to bond the two layers. The non-elastomer elastic yarn shrinks the fabric and pulls the internal threads together during the finishing process of the fabric and garment.

[0009] The non-elastomer elastic yarn content is higher than 10% by weight and lower than 85% by weight of the total weight of the fabric.

[0010] According to some embodiments, the elastic yarn is a two-component polyester filament comprising poly(trimethylene terephthalate) and at least one polymer selected from the group consisting of polyethylene terephthalate, poly(trimethylene terephthalate), and poly(tetramethylene terephthalate) or a combination of such components. The yarn denier is about 20 to about 600, and the two-component filament accounts for about 5% to about 85% by weight, based on the total weight of the fabric, and the fabric is substantially free of green-through of the two-component filament. [Brief explanation of the drawing]

[0011] [Figure 1]This is an image of a circular knitting machine that knits with one non-elastic yarn feed, a dial needle non-elastomer elastic yarn feed, one non-elastic yarn feed, a cylinder needle non-elastomer elastic yarn feed, and a cylinder needle non-elastomer elastic yarn feed. [Figure 2] This is a knitting pattern for forming double jersey fabric. [Modes for carrying out the invention]

[0012] "Elastic fiber" or "elastic yarn" refers to a fiber or yarn that is elastic and resilient. Examples of elastic fibers or elastic yarns include, but are not limited to, elastomer fibers such as spandex, two-component filaments, rustol filaments, and elastoesters, and non-elastomer elastic fibers such as polyester two-component elastic fibers, textured PPT elastic filaments, textured PET elastic filaments, or PBT elastic filaments. "Elastic yarn" and "elastic fiber" are used interchangeably in this context of this specification.

[0013] Elastomer fibers are commonly used to provide stretch and elastic recovery to fabrics and garments. “Elastomer fiber” is either a single continuous filament (optionally aggregated multifilament) or multiple filaments, without diluents, and having a break elongation greater than 100% regardless of crimp. An elastomer fiber, when (1) stretched to twice its original length, (2) held for one minute, and (3) released, shrinks to less than 1.5 times its original length within one minute after release. As used herein, “elastomer fiber” means at least one elastomer fiber or filament. Such elastomer fibers include, but are not limited to, rubber filaments, two-component filaments, and elastoesters, rustol, and spandex.

[0014] "Spandex" is a manufactured filament in which the filament-forming material is a long-chain synthetic polymer consisting of at least 85% by weight of segmented polyurethane.

[0015] A "polyester bicomponent filament" means a continuous filament comprising two polyester materials closely bonded to each other along the length of the fiber, the fiber cross-section of which is, for example, side-by-side, eccentric sheath-core, or other cross-sectional shape suitable for generating useful crimps. The polyester bicomponent filament comprises poly(trimethylene terephthalate) and at least one polymer selected from the group consisting of poly(ethylene terephthalate), poly(trimethylene terephthalate), and poly(tetramethylene terephthalate) or combinations thereof, and has a crimp shrinkage value of about 10% to about 80% after heat setting. The crimp shrinkage was measured by the method described in U.S. Patent No. 7,310,932 B2 (hereinafter referred to as the "'932 Patent"), the full contents of which are incorporated herein by reference.

[0016] "Non-elastomer elastic fibers" refer to elastic filaments that do not contain elastomer fibers. The recoverable elongation must be greater than 15% when tested according to ASTM D6720-07. Examples include textured PTT, textured PET, two-component elastic fibers, or PBT. These fibers develop additional crimp when exposed to temperatures above standard room temperature (20°C).

[0017] "Green-through" refers to the phenomenon where elastic threads become visible through stretched fabric. Green-through can appear as an undesirable shimmer. If a choice is necessary, low green-through on the surface is preferable to low green-through on the reverse side.

[0018] "Draft" refers to the amount of stretch applied to spandex during knitting, covering, or twisting with other fibers. The draft of a fiber is directly related to the elongation (stretch) applied to the fiber (for example, 100% elongation corresponds to a draft of 2x, and 200% elongation corresponds to a draft of 3x).

[0019] "Hard yarn" refers to knitted yarn that does not contain elastic fibers, such as spun cotton yarn, textured polyester filament, or nylon synthetic fiber.

[0020] The clothing of the present invention can be used in a variety of fabrics or types of garments, including sportswear, underwear such as bras, body-fitting wear, athletic wear, dancewear, and various other types of clothing. These garments provide a good fit and comfort due to their relatively light weight, elasticity, resilience, and breathability.

[0021] Elastic fiber content The clothing and fabrics of the present invention may have an elastic fiber content of about 25% to about 60% by weight, about 30% to about 50% by weight, or about 55% to about 45% by weight of the article or fabric.

[0022] Fabric recovery and stretch A fabric tensile test was performed according to ASTM D4964-96. The sample was temperature-controlled for 16 hours at 70°F (approximately 21°C) and 65% relative humidity. The fabric tensile test was performed by circulating the fabric through 200% elongation per minute until it reached 50% elongation. The recovery strength of the fabric at 30% elongation during the third cycle was recorded as the fabric's recovery strength.

[0023] The fabric was evaluated based on its elongation in both the warp and weft directions under a load of 7 kg.

[0024] The resilience in the clothing or fabric of the present invention may be in the range of about 175 to about 400 gram-forces in the warp direction, and in the range of about 200 to about 250 gram-forces, and in the weft direction in the range of about 100 to about 275 gram-forces, about 125 to about 250 gram-forces, and about 130 to about 200 gram-forces.

[0025] The stretchability of the clothing or fabric of the present invention may be in the range of about 40% to about 90%, about 50% to about 85%, and about 60% to about 75%.

[0026] The air permeability of the fabric was measured using a TEXTEST FX 3300 machine manufactured in Zurich, Switzerland in accordance with ASTM D737.

[0027] The air permeability of the clothing or fabric of the present invention may be in the range of about 25 to about 150 cfm, about 35 to about 120 cfm, and about 50 to about 100 cfm.

[0028] In one aspect of the present invention, there is provided a clothing item including a double-knit fabric or an interlock fabric having a two-sided structure, wherein one layer of the fabric includes yarn knitted with dial needles and the other layer of the fabric includes yarn knitted with cylinder needles. The two layers of the fabric further include yarn on cylinder needles. The yarn supplied to at least one of the dial needles or cylinder needles includes an inelastic yarn combined with one non-elastomeric elastic yarn by cross-knitting or twisting, or entanglement, or co-insertion, and the yarn supplied to at least one of the dial needles or cylinder needles includes either an inelastic yarn or a non-elastomeric elastic yarn supplied to the cylinder needles.

[0029] A desirable garment of the present invention includes a double-knit fabric and an interlock fabric having a two-sided structure, wherein one layer of the fabric includes yarn knitted with a dial needle, and the other layer of the fabric includes yarn knitted with a cylinder needle, and the two layers of the fabric further include yarn on the cylinder needle, wherein the yarn supplied to the dial needle includes an inelastic yarn combined with one non-elastomer elastic yarn by interlocking or twisting, entanglement or co-insertion, and the yarn supplied to the cylinder needle includes one inelastic yarn combined with one non-elastomer elastic yarn supplied to the cylinder needle by interlocking or twisting, entanglement or co-insertion.

[0030] In one preferred embodiment of the present invention, the non-elastomer elastic yarn comprises a two-component polyester filament comprising poly(trimethylene terephthalate) and at least one polymer selected from the group consisting of poly(ethylene terephthalate), poly(trimethylene terephthalate), and poly(tetramethylene terephthalate) or a combination thereof, wherein the denier of the yarn is approximately 20 to 600.

[0031] In one aspect of the present invention, the fabric does not contain any spandex yarn.

[0032] In one aspect of the present invention, the non-elastic yarn is polyester, nylon, or cotton, or a blended yarn containing at least 50% of one or more of these yarn fiber types. For example, the blended yarn may contain 50-90% of these yarn fiber types, 60-80% of these yarn fiber types, or 70-85% of these yarn fiber types.

[0033] In another aspect of the present invention, the elastic fiber content is 25 to 60% by weight of the garment.

[0034] In another aspect of the present invention, the resilience of the garment in the warp direction is 175 to 400 grams force, and in the weft direction it is 100 to 275 grams force.

[0035] In yet another aspect of the present invention, the elongation of the garment is 40-90%.

[0036] In yet another aspect of the present invention, the fabric has an air permeability of 5 to 120 cfm.

[0037] In yet another aspect of the present invention, the non-elastic yarn is dyed before knitting.

[0038] In yet another aspect of the present invention, the non-elastic yarn is a yarn dyed with indigo.

[0039] In another aspect of the present invention, the non-elastic yarn includes yarn dyed in a certain color, and the non-elastomer elastic yarn is undyed or dyed in a different color.

[0040] In yet another aspect of the present invention, one or more yarns have one or more properties among moisture absorption control, heat resistance, antibacterial properties, and a soft feel.

[0041] In another aspect of the present invention, the fabric is produced by using a circular knitting machine, a seamless knitting machine, or a flat knitting machine.

[0042] In another aspect of the present invention, a fabric having a two-faced structure comprising a first face, a second face, and a binding yarn, wherein at least one of the aforementioned first face and the aforementioned second face comprises an inelastic yarn and a non-elastomer elastic yarn, and the other of the aforementioned first face and the aforementioned second face comprises a yarn selected from the group consisting of inelastic yarn, non-elastomer elastic yarn, and combinations thereof.

[0043] In another aspect of the present invention, the elastic fiber content is 25 to 60% by weight of the garment.

[0044] In another aspect of the present invention, the resilience of the garment in the warp direction is 175 to 400 grams force, and in the weft direction it is 100 to 275 grams force.

[0045] In yet another aspect of the present invention, the elongation of the garment is 40-90%.

[0046] In yet another aspect of the present invention, the garment has an air permeability of 5 to 120 cfm.

[0047] In yet another aspect of the present invention, a method for producing an elastic double-knit fabric or elastic interlock fabric that is more breathable than conventional fabrics of this type, while maintaining fabric weight and elasticity in the warp and weft directions, and is easier to recycle, The process involves knitting a first layer of fabric with a dial needle and a second layer of fabric with a cylinder needle, wherein both layers of fabric contain the threads of the cylinder needle. A method is provided in which the yarn supplied to at least one of a dial needle or a cylinder needle includes an inelastic yarn combined with a non-elastomer elastic yarn by interlacing or twisting, or entanglement or co-insertion, and the yarn supplied to at least one of a dial needle or a cylinder needle includes either an inelastic yarn or a non-elastomer elastic yarn supplied to the cylinder needle.

[0048] Looking at the drawing, Figure 1 shows a circular knitting machine, and the numbered components correspond to the following: 10 cylinders 12 Dials 14 Feed 2 Cam Block 16 Cylinder thread 18 Feed 1 Cam Block 20 Cam Block 2 22 Cam Block 1 24 Feed 3 Cam Block 26 Connecting thread 28 Dial thread 30 Feed 2 Cam Block

[0049] Figure 2 provides a table showing the yarn structure of a double jersey knit fabric produced using the circular knitting machine shown in Figure 1, according to the garment or fabric of the present invention. Clause Clause 1. Clothing comprising a double-knit fabric or interlock fabric having a two-sided structure, One layer of the fabric contains yarn knitted with a dial needle, and the other layer of the fabric contains yarn knitted with a cylinder needle. The two layers of the fabric further contain the thread on the cylinder needle, The garment wherein the yarn supplied to at least one of the dial needle or the cylinder needle comprises an inelastic yarn combined with a non-elastomer elastic yarn by interlacing or twisting, or entanglement or co-insertion, and the yarn supplied to at least one of the dial needle or the cylinder needle comprises either an inelastic yarn or a non-elastomer elastic yarn supplied to the cylinder needle. Clause 2. An garment according to Clause 1, comprising a double-knit fabric and an interlock fabric having a two-sided structure, wherein one layer of the fabric comprises yarn knitted by the dial needle, and the other layer of the fabric comprises yarn knitted by the cylinder needle, and the two layers of the fabric further comprise yarn on the cylinder needle, wherein the yarn supplied to the dial needle comprises an inelastic yarn combined with a non-elastomer elastic yarn by interlocking or twisting, entanglement or co-insertion, and the yarn supplied to the cylinder needle comprises a nonelastic yarn combined with a non-elastomer elastic yarn supplied to the cylinder needle by interlocking or twisting, entanglement or co-insertion. Clause 3. The garment according to Clause 1 or 2, wherein the non-elastomer elastic yarn is a two-component polyester filament comprising poly(trimethylene terephthalate) and at least one polymer selected from the group consisting of poly(ethylene terephthalate), poly(trimethylene terephthalate), and poly(tetramethylene terephthalate) or a combination thereof, and the denier of the yarn is about 20 to about 600. Clause 4. The garment according to any one of Clauses 1 to 3, wherein the yarn supplied to the cylinder needle includes a non-elastomer elastic yarn. Clause 5. A garment as described in any one of Clauses 1 to 4, wherein the fabric does not contain any spandex yarn. Clause 6. The garment according to any one of Clauses 1 to 5, wherein the non-elastic yarn is polyester, nylon, or cotton, or a blended yarn containing at least 50% of one or more of these yarn fiber types. Clause 7. Clothing according to any one of Clauses 1 to 6, wherein the elastic fiber content is 25 to 60% by weight. Clause 8. A garment as described in any one of Clauses 1 to 7, wherein the garment has a resilience of 175 to 400 gram-force in the warp direction and a resilience of 100 to 275 gram-force in the weft direction. Clause 9. Clothing described in any one of Clauses 1 to 8, with an elongation of 40-90%. Clause 10. Clothing described in any one of Clauses 1 to 9, having an air permeability of 5 to 120 cfm. Clause 11. The garment described in any one of Clauses 1 to 10, wherein the non-elastic yarn is dyed before knitting. Clause 12. The garment described in any one of Clauses 1 to 11, wherein the non-elastic yarn is dyed indigo. Clause 13. The garment according to any one of Clauses 1 to 12, wherein the non-elastic yarn includes yarn dyed in a certain color, and the non-elastomer elastic yarn is undyed or dyed in a different color. Clause 14. Clothing according to any one of Clauses 1 to 13, wherein one or more of the aforementioned yarns have moisture management, heat resistance, antibacterial properties, and a soft feel. Clause 15. The garment described in any one of Clauses 1 to 14, made by using a circular knitting machine, a seamless knitting machine, or a flat knitting machine. Clause 16. A fabric having a two-sided structure including a first surface, a second surface, and a binding thread, At least one of the first surface and the second surface includes an inelastic yarn and a non-elastomer elastic yarn, The fabric wherein the other of the first and second surfaces comprises yarn selected from the group consisting of non-elastic yarn, non-elastomer elastic yarn, and combinations thereof. Clause 17. The garment described in Clause 16, wherein the elastic fiber content is 25 to 60% by weight. Clause 18. The garment according to Clause 16 or 17, wherein the resilience of the garment in the warp direction is 175 to 400 gram force and the resilience of the garment in the weft direction is 100 to 275 gram force. Clause 19. Clothing described in any one of Clauses 16-18, having an elongation of 40-90%. Article 20. Clothing described in any one of Articles 16 to 19, having an air permeability of 5 to 120 cfm. Clause 21. A method for producing an elastic double-knit fabric or elastic interlock fabric that is more breathable than conventional fabrics of this type, while maintaining fabric weight and elasticity in the warp and weft directions, and is easier to recycle, The process involves knitting a first layer of fabric with a dial needle and a second layer of fabric with a cylinder needle, wherein the two layers of fabric include threads on the cylinder needle. The method wherein the yarn supplied to at least one of the dial needle or the cylinder needle includes an inelastic yarn combined with a non-elastomer elastic yarn by interlacing or twisting, or entanglement or co-insertion, and the yarn supplied to at least one of the dial needle or the cylinder needle includes either an inelastic yarn or a non-elastomer elastic yarn supplied to the cylinder needle. Article 22. Clothing made in any combination of any one of Articles 1 to 21.

[0050] The features and advantages of the present invention are more fully illustrated by the following examples. The examples are provided for illustrative purposes only and are not to be construed as limiting the invention. [Examples]

[0051] Examples 1-5 are comparative fabrics prepared and do not represent the present invention, as clearly stated. Examples 6-8 show fabrics prepared according to the present invention.

[0052] Example 1 (Comparison) The double jersey fabric was prepared as follows: 70 denier / 88 filament polyester yarn was interwoven with 20 denier LYCRA® spandex fibers and fed into a dial needle, and the same yarn set was fed into a cylinder needle to form both layers of the fabric. 20 denier LYCRA® spandex fibers were fed into the cylinder needle to bond the two layers. The draft of all LYCRA® spandex fibers in the fabric during knitting was 3.25 times.

[0053] Example 2 (Comparison) The double jersey fabric was prepared as follows: 50 denier / 72 filament polyester yarn was fed to a dial needle, and the same yarn set was fed to a cylinder needle to form both layers of the fabric. 20 denier LYCRA® spandex fibers were fed to the cylinder needle to bond the two layers together. The draft of all LYCRA® spandex fibers in the fabric during knitting was 3.25 times.

[0054] Example 3 (Comparison) The double jersey fabric was prepared as follows: 50 denier / 72 filament polyester yarn was fed to a dial needle, and the same yarn set was fed to a cylinder needle to form both layers of the fabric. 30 denier LYCRA® spandex fibers were fed to the cylinder needle to bond the two layers together. The draft of all LYCRA® spandex fibers in the fabric during knitting was 3.25 times.

[0055] Example 4 (Comparison) The double jersey fabric was manufactured as follows: 50 denier / 72 filament polyester yarn was fed to a dial needle, and the 50 denier / 72 filament polyester yarn was interwoven with 30 denier LYCRA® spandex fibers and fed to a cylinder needle to form both layers of the fabric. 20 denier nylon yarn was fed to the cylinder needle to bond the two layers together. The draft of all LYCRA® spandex fibers in the fabric during knitting was 3.25 times.

[0056] Example 5 (Comparison) The double jersey fabric was manufactured as follows: 50 denier / 72 filament polyester yarn was interwoven with 20 denier LYCRA® spandex fibers and fed to a dial needle, and 50 denier / 72 filament polyester yarn was interwoven with 20 denier LYCRA® spandex fibers and fed to a cylinder needle to form both layers of the fabric. 20 denier nylon yarn was fed to the cylinder needle to bond the two layers together. The draft of all LYCRA® spandex fibers in the fabric during knitting was 3.25 times.

[0057] Example 6 (Invention) The double jersey fabric was manufactured as follows: 70 denier / 88 filament polyester yarn was interwoven with 20 denier LYCRA® T400 fiber (a two-component polyester fiber) and fed into a dial needle to knit one layer of the fabric. The 20 denier LYCRA® T400 fiber was then fed into a cylinder needle to knit the other layer. The two layers were then joined together by feeding the 20 denier LYCRA® T400 fiber into a cylinder needle.

[0058] Example 7 (Invention) The double jersey fabric was manufactured as follows: One layer of the fabric was knitted by supplying 20-denier LYCRA® T400 fibers (two-component polyester fibers) to a dial needle, and the other layer of the fabric was knitted by interweaving 70-denier / 88-filament polyester yarn with the 20-denier LYCRA® T400 fibers and supplying it to a cylinder needle. The two layers were then joined to the cylinder needle with 15-denier nylon fabric.

[0059] Example 8 (Invention) The double jersey fabric was manufactured as follows: 70-denier / 88-filament polyester yarn was interwoven with 20-denier LYCRA® T400 fiber (a two-component polyester fiber) and fed to a dial needle to knit one layer of the fabric. The other layer was knitted by interwoven 70-denier / 88-filament polyester yarn with 20-denier LYCRA® T400 fiber and fed to a cylinder needle. The two layers were then joined by feeding 20-denier LYCRA® T400 fiber to the cylinder needle. [Table 1-1] [Table 1-2] [Table 1-3]

[0060] As shown in Table 1, which illustrates the characteristics of the comparative fabric structure and the fabric structure of the present invention, the fabric recovery of fabrics 6-8 of the present invention is significantly lower in both the warp and weft directions compared to the comparative fabric structure not manufactured according to the present invention.

[0061] Furthermore, the balance of other properties such as elasticity and air permeability is achieved in the fabric of the present invention, as shown in Table 1, and in some cases, the fabric weight is kept substantially the same as that of conventional comparative fabrics.

Claims

1. Clothing comprising a double-knit fabric or interlock fabric having a two-sided structure, One layer of the fabric contains yarn knitted with a dial needle, and the other layer of the fabric contains yarn knitted with a cylinder needle. The two layers of the fabric further contain the thread on the cylinder needle, The garment wherein the yarn supplied to at least one of the dial needle or the cylinder needle comprises an inelastic yarn combined with a non-elastomer elastic yarn by interlacing or twisting, or entanglement or co-insertion, and the yarn supplied to at least one of the dial needle or the cylinder needle comprises either an inelastic yarn or a non-elastomer elastic yarn supplied to the cylinder needle.

2. Clothing comprising a double-knit fabric or interlock fabric having a two-sided structure, One layer of the fabric contains yarn knitted with a dial needle, and the other layer of the fabric contains yarn knitted with a cylinder needle. The two layers of the fabric further contain the thread on the cylinder needle, The garment wherein the yarn supplied to the dial needle includes an inelastic yarn combined with a non-elastomer elastic yarn by interweaving, twisting, entanglement, or co-insertion, and the yarn supplied to the cylinder needle includes an inelastic yarn combined with a non-elastomer elastic yarn supplied to the cylinder needle by interweaving, twisting, entanglement, or co-insertion.

3. The garment according to claim 2, wherein the non-elastomer elastic yarn is a two-component polyester filament comprising poly(trimethylene terephthalate) and at least one polymer selected from the group consisting of poly(ethylene terephthalate), poly(trimethylene terephthalate), and poly(tetramethylene terephthalate) or a combination thereof, and the denier of the yarn is about 20 to about 600.

4. The garment according to claim 2, wherein the yarn supplied to the cylinder needle includes a non-elastomer elastic yarn.

5. The garment according to claim 2, wherein the fabric does not contain any spandex yarn.

6. The garment according to claim 2, wherein the non-elastic yarn is polyester, nylon, or cotton, or a blended yarn containing at least 50% of one or more of these yarn fiber types.

7. The garment according to claim 1 or 2, wherein the elastic fiber content is 25 to 60% by weight.

8. The garment according to claim 1 or 2, wherein the recovery force of the garment in the warp direction is 175 to 400 grams force, and the recovery force of the garment in the weft direction is 100 to 275 grams force.

9. The garment according to claim 1 or 2, wherein the stretch is 40 to 90%.

10. The garment according to claim 1 or 2, having an air permeability of 5 to 120 cfm.

11. The garment according to claim 2, wherein the non-elastic yarn is dyed before knitting.

12. The garment according to claim 2, wherein the non-elastic yarn is a yarn dyed with indigo.

13. The garment according to claim 2, wherein the non-elastic yarn includes a yarn dyed in a certain color, and the non-elastomer elastic yarn is undyed or dyed in a different color.

14. The garment according to claim 2, wherein one or more of the aforementioned threads have moisture management, heat resistance, antibacterial properties, and a soft feel.

15. The garment according to claim 2, wherein the fabric is produced using a circular knitting machine, a seamless knitting machine, or a flat knitting machine.

16. A fabric having a two-sided structure including a first surface, a second surface, and a binding thread, At least one of the first surface and the second surface includes an inelastic yarn and a non-elastomer elastic yarn, The fabric wherein the other of the first and second surfaces includes yarn selected from the group consisting of non-elastic yarn, non-elastomer elastic yarn, and combinations thereof.

17. The clothing item according to claim 16, wherein the elastic fiber content is 25 to 60% by weight.

18. The garment according to claim 17, wherein the recovery force of the garment in the warp direction is 175 to 400 grams force, and the recovery force of the garment in the weft direction is 100 to 275 grams force.

19. The garment according to claim 18, wherein the stretch is 40 to 90%.

20. The garment according to claim 19, having an air permeability of 5 to 120 cfm.

21. A method for producing an elastic double-knit fabric or elastic interlock fabric that maintains fabric weight and stretchability in the warp and weft directions, while improving breathability compared to conventional fabrics of this type and being easily recyclable, The process involves knitting a first layer of fabric with a dial needle and a second layer of fabric with a cylinder needle, wherein the two layers of fabric include threads on the cylinder needle. The method wherein the yarn supplied to at least one of the dial needle or the cylinder needle includes an inelastic yarn combined with a non-elastomer elastic yarn by interlacing or twisting, or entanglement or co-insertion, and the yarn supplied to at least one of the dial needle or the cylinder needle includes either an inelastic yarn or a non-elastomer elastic yarn supplied to the cylinder needle.

22. Clothing items comprising any combination of claims 1 to 21.

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