Elastic yarn, elastic fabric, elastic denim garment and manufacturing method

Abstract

The application discloses an elastic yarn, an elastic fabric, an elastic jean garment and a manufacturing method thereof, and belongs to the field of textiles.In the fabric manufacturing method, the weft yarn spun includes the elastic yarn, the elastic yarn is composed of spandex and a second chemical fiber coated on the surface of the spandex, the melting point of the second chemical fiber is lower than that of the spandex, the processing temperature of the remaining procedures in the post-finishing is below the melting point of the second chemical fiber except singeing, in the singeing procedure, the fire grate temperature is 300 DEG C, and the vehicle speed is 90 m / min.The second chemical fiber is used to coat the spandex, the elasticity of the spandex is limited, the rapier loom is used for weaving, the post-finishing is carried out under relatively mild process conditions before washing, the second chemical fiber is prevented from being damaged in advance, the chemical fiber is more difficult to permeate water than cotton fiber, the spandex is prevented from being damaged in the harsh washing environment, in the washing and drying, the temperature of the drying makes the second chemical fiber melt and be removed, the bare spandex is left, and the elasticity of the spandex can be fully exerted.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of elastic yarn, elastic fabric, elastic jeans and production method, belong to textile field. BACKGROUND

[0002] With the progress of society and economic development, people's pursuit of jeans is no longer limited to the design of style, gradually more attention is paid to the free stretchability of jeans when wearing. Traditional denim fabric uses indigo dye as warp yarn, pure cotton yarn as weft yarn, and is woven into twill by filling. It has the characteristics of thickness, tightness and stiffness. With the progress of denim design technology, in order to make denim more comfortable to wear, core spun yarn is used in the production of denim, so that the finished denim has elasticity.

[0003] Elastic denim is more and more popular, and its stretchability and recovery make the finished jeans have certain extension ability, meeting the market demand. In the production process of elastic fabric, core spun yarn is generally used for weaving, such as single core spun yarn and double core spun yarn. The method of making elastic core spun yarn is that the short fibers on the outer layer are formed into roving on the roving frame, and then the spandex is stretched while the above-mentioned roving is wrapped in the spinning machine. Due to the twisting and wrapping of the outer layer short fibers, there is friction between the spandex and the short fibers, that is, the outer layer short fibers can be elongated with the stretching of the spandex, so that the core spun yarn has certain strength and elasticity. But also because the spandex is limited by the outer layer short fibers, the elasticity of the core spun yarn is not as good as that of bare spandex, and the elastic elongation rate of the fabric made of core spun yarn is only about 70%, which cannot be stretched arbitrarily along the weft direction, and the 70% elastic elongation rate cannot be fully utilized in daily exercise, because when stretched to a certain extent, the external force required for further stretching is greater than the force used in daily exercise, which will make some parts of the body feel obvious compression and resistance, far from the comfortable elastic effect of yoga pants.

[0004] Yoga pants, leggings and other fabrics have good elastic effect because the production equipment of knitted fabric can directly use spandex to weave and interweave in the form of loop, and the spandex is less disturbed by other fibers, and the knitting method itself can make the fabric have certain elasticity, which makes yoga pants and leggings have excellent elasticity. However, knitted fabric is prone to edge curling and has poor dimensional stability. The unique vintage twill style of denim fabric is presented after washing. It is difficult to achieve this vintage style with knitted denim fabric, but the way of exposing spandex gives a little idea to the weaving technology.

[0005] If directly using spandex yarn to weave on double rapier loom, the elasticity elongation of the fabric can reach more than 600%, but the production difficulty is extremely great, and the good product rate is low. This is because in the ordinary weaving process, the speed of the double rapier loom reaches more than 500 r / min, and the double rapier weaves, both sides of the loom are equipped with rapier and corresponding rapier transmission mechanism. The two rapiers are respectively called weft feeding rapier and weft receiving rapier. When weft is introduced, the weft feeding rapier and the weft receiving rapier move from both sides of the machine to the center of the shed, the weft is first held by the weft feeding rapier and sent to the center of the shed, the two rapiers meet at the center of the shed, the weft is transferred from the weft feeding rapier to the weft receiving rapier, and then the weft feeding rapier and the weft receiving rapier retreat respectively, and the weft is pulled through the shed by the weft receiving rapier; since spandex has excellent elasticity, it is difficult to rewind in the weft accumulator, and when it is clamped by the weft feeding rapier, it is easy to cause empty weft due to too good elastic recovery effect, and when it is clamped by the weft receiving rapier again, it cannot stably control the draft ratio, and it is easy to cause the fabric to have great quality problems.

[0006] When the weft direction is difficult to further enhance the elasticity, the researchers think of improving the warp direction. In order to make the elasticity of the woven fabric better, a double-layer structure is arranged in the warp direction through the design of the organizational structure, so that the spandex is hidden under the face layer warp yarn, so that the warp direction of the fabric also has the effect of elasticity. But because the outer layer is a non-elastic yarn processed from short fibers, the tensile properties of the warp direction are still weak. For denim fabric, the effect of this organizational structure is even worse, because denim garments need to go through a washing process (enzyme bleaching, oxygen bleaching, chlorine bleaching). Although the spandex is hidden in appearance, it will still directly contact chemicals during the solution treatment process, causing damage to the spandex in the washing process, and the double-layer structure of the warp yarn will make the fabric unable to achieve the twill effect of traditional denim fabric.

[0007] In fact, whether the warp yarn is hidden in the warp direction or directly using spandex yarn to weave on the double rapier loom, there is still a difficult problem, that is, spandex needs to be exposed to play better elasticity. The post-finishing process in the traditional production process of denim fabric will cause slight damage to the exposed spandex, and the washing process that denim garments must go through will continue to cause severe damage to the exposed spandex, making the spandex brittle, and the elasticity of the spandex will decrease after washing, and even break, so the existing technology needs to be improved. SUMMARY

[0008] In order to overcome the shortcomings of the prior art, the present application provides a kind of elastic yarn, elastic fabric and its manufacturing method, and provides a kind of elastic denim garment and its manufacturing method, protects spandex from washing damage, and finally can provide good elasticity with exposed spandex.

[0009] The technical scheme adopted by the present application to solve its technical problems is:

[0010] In a first aspect, the application provides an elastic yarn, which is composed of spandex and a second chemical fiber coated on the surface of the spandex, the melting point of the second chemical fiber is lower than that of the spandex, the melting point of the second chemical fiber is 60-130℃, and the second chemical fiber is selected from polyester, polyvinyl alcohol or polypropylene.

[0011] Further, in the elastic yarn, the ratio of the thickness of the second chemical fiber to the radius of the spandex is 1:5, which can ensure the protection of the second chemical fiber to the spandex and the limiting effect of the second chemical fiber to the elasticity of the spandex, and can also avoid the fabric becoming loose after washing and drying.

[0012] Further, the elastic yarn is made by coaxial spinning, so that the second chemical fiber is more tightly coated on the spandex, the protection of the second chemical fiber to the spandex is stronger, and the damage of the spandex during finishing and washing can be avoided; the limiting effect of the second chemical fiber to the elasticity of the spandex is also stronger, which is more conducive to the smooth weaving of the elastic yarn by the rapier loom.

[0013] In a second aspect, the application provides a method for making an elastic fabric, which comprises the steps of spinning, weaving and finishing in sequence, the step of spinning spins warp yarns and weft yarns, the step of finishing comprises the steps of singeing, desizing and preshrinking in sequence, the weft yarns comprise the elastic yarn of the first aspect, the treatment temperature of the desizing process is below the melting point of the second chemical fiber, in the singeing process, the temperature of the fire row is 300℃ and the speed is 90m / min, and in the preshrinking process, the front side of the fabric faces upward.

[0014] The method for making an elastic fabric provided by the application uses the second chemical fiber to coat the spandex, limits the elasticity of the spandex, facilitates weaving by the rapier loom, and treats the cloth in a relatively mild manner before washing, so as to avoid the second chemical fiber being damaged in advance, low temperature and high speed are used in the singeing process, which can remove most of the fiber fluff while reducing damage to the second chemical fiber, in the preshrinking process, the front side of the fabric faces upward, which reduces damage to the weft yarns on the back side, during washing, chemical fibers are more difficult to penetrate water than cotton fibers, so that the spandex is not damaged in the harsh washing environment. After washing, drying is necessary, the temperature of drying will cause the second chemical fiber to melt and be removed, leaving the spandex exposed, which can fully exert the elasticity of the spandex. Household washing does not have the strong oxidation and strong alkali environment of industrial washing, and does not cause heavy damage to the spandex, so the fabric can maintain good elasticity for a long time. The melting point of the second chemical fiber is 60-130℃, and the second chemical fiber with this melting point range can withstand relatively mild finishing and can be fully melted and removed at the temperature of washing and drying.

[0015] Further, the pre-shrinking process has a temperature of 110-130℃ and a speed of 40-50m / min. Denim fabric is usually woven with a 3 over 1 twill, so the front side has more warp than weft, and the back side has more weft than warp. During pre-shrinking, the front side is up, which reduces the damage to the weft. Meanwhile, a higher speed during pre-shrinking also reduces the damage to the second chemical fiber.

[0016] Further, the weft also includes pure cotton weft, and the weft-to-elastic ratio is 7-3:2. The elastic and pure cotton weft are woven side by side, which reduces the density change of the fabric after washing and drying, and also makes non-body-hugging clothes.

[0017] Further, the desizing process has a desizing enzyme concentration of 6-10g / L, a temperature of 45-55℃, and a speed of 60-80m / min. Compared with the desizing process in the prior art, the temperature is lower, the speed is faster, and the desizing enzyme concentration is higher, which can ensure complete desizing and avoid damage to the second chemical fiber.

[0018] Further, the finishing step also includes loose flat washing, which is between the desizing and the pre-shrinking. The loose flat washing has a temperature of 50-60℃ and a time of 10-30min.

[0019] Although the singeing speed is fast, the elastic yarn of the second chemical fiber still shrinks slightly under the action of temperature, and the weft exerts more pressure on the warp. After the fabric becomes relatively soft through desizing, loose flat washing is continued, which releases the internal stress of the fibers in the warp under low tension, reduces the shrinkage of the warp, shortens the pre-shrinking time, and avoids damage to the second chemical fiber.

[0020] In a third aspect, the application provides an elastic fabric made by the method of the second aspect. The fabric has a certain elasticity even when used directly, and after washing and drying, the second chemical fiber is removed, exposing the spandex, and the elasticity of the fabric is fully released.

[0021] In a fourth aspect, the application provides a method for making an elastic denim garment, which includes the steps of: garment making, washing, first drying, cleaning, and second drying. The fabric used for garment making includes the elastic fabric of the third aspect. The first drying has a temperature of 110-150℃ and a time of 10-20min. The second drying has a temperature of 100-120℃ and a time of 5-10min.

[0022] The first drying makes the second chemical fiber melt and fall off, and the cleaning process can wash off the fallen second chemical fiber, and the second drying is not only for drying after cleaning, but also for removing part of the residual second chemical fiber, and the second drying has lower temperature and shorter time, so as to avoid damaging the exposed spandex.

[0023] Further, the second chemical fiber is polypropylene, and decahydronaphthalene is used as a detergent in the cleaning step, and the cleaning temperature is 130 DEG C.

[0024] Further, the second chemical fiber is polyester, and the pH is 11-13 in the cleaning step.

[0025] In the fifth aspect, the application provides a stretch denim garment made by the method of the fourth aspect.

[0026] The application has the advantages that: the application uses the second chemical fiber to cover the spandex, limits the elasticity of the spandex, facilitates weaving with a rapier loom, and avoids damaging the second chemical fiber in advance by using relatively mild process conditions for finishing before washing, so that the spandex is not damaged in the harsh washing environment, and the second chemical fiber is melted and removed during drying, leaving exposed spandex, which can fully exert the elasticity of the spandex.

[0027] Other features and advantages of the application will be described in the following description, and some will become apparent from the description, or will be understood by those skilled in the art. The purpose and other advantages of the application can be achieved and obtained by the structure specifically pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of a stretch yarn provided by an embodiment of the application.

[0029] Reference signs: 1, spandex; 2, second chemical fiber. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all. Based on the described embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0031] It should be understood that any and all embodiments of the present application can be combined with the technical features of any other embodiment or embodiments, to the extent that they do not conflict, in order to arrive at additional embodiments. The present application includes such combinations to arrive at additional embodiments.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as is commonly understood by one of ordinary skill in the art to which this application belongs. If there is an inconsistency between the definitions of terms as defined in this document and as used in the art, the definition as used in the art prevails.

[0033] The embodiment of the present application provides a method for manufacturing elastic fabric, the steps include spinning, weaving and finishing in sequence, the warp yarn and the weft yarn are spun in the step of spinning, the warp yarn is pure cotton yarn, the step of finishing includes singeing, desizing and preshrinking in sequence, the weft yarn includes elastic yarn, referring to Figure 1 , the elastic yarn is composed of spandex 1 and second chemical fiber 2 coated on the surface of the spandex 1, the melting point of the second chemical fiber 2 is lower than that of the spandex 1. The treatment temperature of desizing is below the melting point of the second chemical fiber 2, the fire grate temperature is 300 DEG C in the process of singeing, the speed is 90 m / min, and the front of the fabric faces up when preshrinking.

[0034] When weaving, the second chemical fiber limits the elasticity of the spandex to a certain extent, so that the elastic yarn with spandex can be smoothly woven into the rapier loom.

[0035] When finishing, the finishing is carried out under relatively mild process conditions, so as to avoid that the second chemical fiber is damaged (herein, the complete damage is referred to, and the finishing will inevitably cause slight damage to the second chemical fiber) in advance, and the spandex is extremely slightly deteriorated under the protection of the second chemical fiber.

[0036] The denim fabric is cut and sewn into clothes, and then needs to be treated by washing water to have the worn-out effect, and after washing, the clothes must be dried, the melted second chemical fiber is removed during drying, so that the spandex is exposed and fully releases the spandex elasticity originally limited in the elastic yarn.

[0037] The embodiment of the present application also makes the fabric manufactured by the method into denim clothes, and the steps include making clothes, washing water, first drying, cleaning and second drying in sequence; the cloth used for making clothes is the elastic fabric described above; the temperature of the first drying is 110 DEG C-150 DEG C, and the time is 10 min-20 min; the temperature of the second drying is 100 DEG C-120 DEG C, and the time is 5 min-10 min.

[0038] During washing, the chemical fiber is more difficult to penetrate water than the cotton fiber, so that the spandex is not damaged in the harsh washing environment, and the spandex is prevented from being brittle and broken.

[0039] When drying, the temperature of the drying causes the second chemical fiber to melt and be removed, leaving the bare spandex, which can fully exert the elasticity of the spandex. Specifically, the first drying temperature is high and the time is long, which can cause the second chemical fiber to melt and fall off, and the cleaning process can wash off the fallen second chemical fiber. The second drying is not only drying after cleaning, but also helps to remove part of the remaining second chemical fiber. At the same time, the second drying temperature is lower and the time is shorter, which avoids damaging the already exposed spandex.

[0040] The melting point of the second chemical fiber is 60-130°C. Those skilled in the art know that the melting point of the chemical fiber can be controlled by the polymerization degree of the chemical fiber. The second chemical fiber in this melting point range can withstand relatively mild finishing and can fully melt and be removed at the temperature of washing and drying.

[0041] Specifically, the second chemical fiber can be selected from polyester, polyvinyl alcohol or polypropylene.

[0042] When the second chemical fiber is polyvinyl alcohol, the second chemical fiber can be dissolved in hot water and removed at a later stage. Accordingly, the protective effect on spandex is not as good as polyester and polypropylene.

[0043] In order to avoid the second chemical fiber after melting from re-solidifying and adhering to the spandex, when the second chemical fiber is polypropylene, decahydronaphthalene is used as a cleaning agent in the cleaning step after the first drying. The cleaning temperature is 130°C. When the second chemical fiber is polyester, the pH in the cleaning step is 11-13, which can be adjusted by caustic soda. Therefore, the second chemical fiber is preferably polyester, which is not dissolved in neutral hot water, has a better protective effect on spandex, and caustic soda is a commonly used material in textile processing. There is no need to purchase an organic solvent to wash the second chemical fiber. The cost of removing the second chemical fiber is lower and more environmentally friendly.

[0044] Preferably, the elastic yarn is made by coaxial spinning, so that the second chemical fiber covers the spandex more tightly, the protective effect of the second chemical fiber on the spandex is stronger, and the damage to the spandex during finishing and washing is avoided. The limiting effect of the second chemical fiber on the elasticity of the spandex is also stronger, which is more conducive to the smooth weaving of the elastic yarn by the rapier loom.

[0045] If the thickness of the second chemical fiber is too small, the protective effect on the spandex is not good, and the limitation on the elasticity of the spandex is insufficient. If the thickness of the second chemical fiber is too large, the diameter of the elastic yarn before and after washing changes greatly, which causes the fabric density to change significantly. Preferably, the ratio of the thickness of the second chemical fiber to the radius of the spandex is 1:5, which can ensure the protective effect of the second chemical fiber on the spandex and the limiting effect of the second chemical fiber on the elasticity of the spandex, and can avoid the fabric becoming significantly loose after washing and drying.

[0046] If all weft yarns are elastic yarns, in addition to the large change of fabric density after washing and drying, the fabric has strong elasticity, which makes the jeans have the effect of body shaping and plasticity, and it is difficult to be accepted by consumers who like loose clothes. Preferably, the weft yarns also include pure cotton weft yarns, and the weaving ratio of elastic yarns to pure cotton weft yarns is 7-3:2. Weaving elastic yarns and pure cotton weft yarns side by side is conducive to weakening the change of fabric density after washing and drying, and also can make loose clothes with good elasticity.

[0047] In the desizing process, the desizing enzyme concentration is 6 g / L-10 g / L, the treatment temperature is 45℃-55℃, and the speed is 60 m / min-80 m / min. Compared with the desizing process in the prior art, the desizing process has lower treatment temperature, faster speed, and higher desizing enzyme concentration, which can avoid the second chemical fiber from being damaged in advance while ensuring complete desizing.

[0048] The finishing step also includes loose flat washing, which is between desizing and pre-shrinking. The treatment temperature of loose flat washing is 50℃-60℃, and the treatment time is 10min-30min. Although the singeing speed is fast, the elastic yarns which are completely chemical fibers will still shrink slightly under the action of temperature, and the extrusion of weft yarns on warp yarns is strengthened. After the fabric becomes relatively soft after desizing, loose flat washing is continued, which can release the internal stress of fibers in the warp yarns under the action of low tension, reduce the shrinkage rate in the warp direction, and is conducive to shortening the time of pre-shrinking and avoiding the second chemical fiber from being damaged in advance.

[0049] Example 1

[0050] A cloth base was woven with 12S cotton yarn as warp yarn and elastic yarn as weft yarn. The elastic yarn was a coaxial spun elastic yarn, specifically a 150D composite yarn, with polyvinyl alcohol as the outer layer and spandex as the inner layer. The woven cloth base was finished, and in the singeing process, the fire row temperature was 300℃, and the speed was 90 m / min. In the desizing process, the desizing enzyme concentration was 10 g / L, the treatment temperature was 45℃, and the speed was 80 m / min. The measured weft direction elastic elongation rate of the cloth base before washing was 33.8%. After cutting and sewing, washing-first drying-washing-second drying were carried out. The temperature of the first drying was 110℃, and the time was 10min; the temperature of the second drying was 100℃, and the time was 5min. The final test obtained the weft direction elastic elongation rate after washing of 152.7%.

[0051] Example 2

[0052] The 12S cotton yarn is used as warp yarn, and the elastic yarn is used as weft yarn to weave the fabric. The elastic yarn is the elastic yarn made by coaxial spinning, specifically 150D composite yarn, the outer layer is polyester, and the inner layer is spandex. The woven fabric is subjected to post-finishing. In the process of singeing, the fire row temperature is 300°C, and the speed is 90 m / min; in the process of desizing, the desizing enzyme concentration is 8 g / L, the treatment temperature is 50°C, and the speed is 70 m / min. The measured weft elastic elongation rate of the fabric before washing is 34.8%. After cutting and sewing, washing-drying for the first time-washing-drying for the second time are carried out. The temperature of the first drying is 150°C, and the time is 10 min; the pH is adjusted to 13 by using caustic soda during washing; the temperature of the second drying is 120°C, and the time is 5 min. The final test obtains the weft elastic elongation rate after washing of 153.9%.

[0053] Example 3

[0054] The 12S cotton yarn is used as warp yarn, and the elastic yarn is used as weft yarn to weave the fabric. The elastic yarn is the elastic yarn made by coaxial spinning, specifically 150D composite yarn, the outer layer is polyester, and the inner layer is spandex. The woven fabric is subjected to post-finishing. In the process of singeing, the fire row temperature is 300°C, and the speed is 90 m / min; in the process of desizing, the desizing enzyme concentration is 8 g / L, the treatment temperature is 50°C, and the speed is 70 m / min. The measured weft elastic elongation rate of the fabric before washing is 34.8%. After cutting and sewing, washing-drying for the first time-washing-drying for the second time are carried out. The temperature of the first drying is 150°C, and the time is 10 min; the pH is adjusted to 13 by using caustic soda during washing; the temperature of the second drying is 120°C, and the time is 5 min. The final test obtains the weft elastic elongation rate after washing of 153.9%.

[0055] Comparative Example 1

[0056] The 12S cotton yarn is used as warp yarn, and the elastic yarn is used as weft yarn to weave the fabric. The elastic yarn is the elastic yarn made by coaxial spinning, specifically 150D composite yarn, the outer layer is polyester, and the inner layer is spandex. The woven fabric is subjected to post-finishing. In the process of singeing, the fire row temperature is 300°C, and the speed is 90 m / min; in the process of desizing, the desizing enzyme concentration is 8 g / L, the treatment temperature is 50°C, and the speed is 70 m / min. The measured weft elastic elongation rate of the fabric before washing is 34.8%. After cutting and sewing, washing-drying for the first time-washing-drying for the second time are carried out. The temperature of the first drying is 150°C, and the time is 10 min; the pH is adjusted to 13 by using caustic soda during washing; the temperature of the second drying is 120°C, and the time is 5 min. The final test obtains the weft elastic elongation rate after washing of 153.9%.

[0057] Comparative Example 2

[0058] The base fabric is woven with 12S cotton yarn as warp yarn and 150D spandex as weft yarn. The base fabric is subjected to post-finishing. In the process of singeing, the temperature of the fire is 300℃ and the speed is 90m / min. In the process of desizing, the concentration of desizing enzyme is 10g / L, the treatment temperature is 45℃, and the speed is 80m / min. The weft elastic elongation of the base fabric before washing is measured to be 163.5%. After cutting and sewing, the fabric is subjected to washing-drying. The drying temperature is 110℃ and the time is 10min. The weft elastic elongation after washing is measured to be 104.7%.

[0059] It can be seen that, although the elastic of Comparative Example 2 is good before washing, the damage to spandex caused by washing is serious, and the elongation after washing decreases significantly. In Example 1, Example 2 and Example 3, the second chemical fiber limits the elasticity of spandex before washing, and the second chemical fiber is removed after washing and drying, so that the final elongation is greater than that of Comparative Example 1 and Comparative Example 2, and the weaving is more smooth, and the number of stoppage adjustments is much less than that of Comparative Example 2. The conventional high-elasticity denim fabric like Comparative Example 2 not only has a low yield in weaving, but also is prone to edge curling due to the high elasticity of the weft during cutting in the garment making process, and the garment maker is more likely to encounter unevenness, misalignment and other quality problems, and repeated flattening is required for sewing, which is low in sewing efficiency. The fabric of the present application does not show high elasticity until after washing and drying of the finished garment, so that the above problems do not occur during cutting and sewing, and the quality and production efficiency are effectively improved. When the finished denim garment is subjected to multiple washing processes, the second chemical fiber on the outer layer can protect the spandex on the inner layer under harsh process conditions such as enzyme washing, chlorine bleaching, oxygen bleaching and stone grinding, and the naked spandex denim with a worn-out effect is obtained after washing and drying, which is excellent in elasticity and does not feel tight and oppressive.

[0060] In the description of the present specification, the description referring to the terms "one embodiment", "certain embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The above is the preferred embodiment of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements are also considered within the protection scope of the present application.

Claims

1. A method for manufacturing elastic denim clothing, characterized in that, The steps include, in sequence: garment making, washing, first drying, rinsing, and second drying; the fabric used for garment making includes elastic fabric; the temperature of the first drying is 110℃-150℃, and the time is 10min-20min; the temperature of the second drying is 100℃-120℃, and the time is 5min-10min. The manufacturing method of the elastic fabric includes spinning, weaving and finishing in sequence. In the spinning step, warp yarns and weft yarns are spun out. In the finishing step, singeing, desizing and pre-shrinking are performed in sequence. The weft yarn includes elastic yarn. The desizing treatment temperature is below the melting point of the second chemical fiber. In the singeing process, the burner temperature is 300℃ and the machine speed is 90m / min. In the pre-shrinking process, the right side of the fabric is facing up. The elastic yarn is composed of spandex and a second chemical fiber covering the surface of the spandex. The melting point of the second chemical fiber is lower than that of the spandex. The melting point of the second chemical fiber is 60℃-130℃. The second chemical fiber is selected from polyester, polyvinyl alcohol or polypropylene.

2. The method for manufacturing elastic denim garments according to claim 1, characterized in that, The second chemical fiber is polypropylene. In the cleaning step, decahydronaphthalene is used as a detergent, and the cleaning temperature is 130°C.

3. The method for manufacturing elastic denim garments according to claim 1, characterized in that, The second chemical fiber is polyester, and the pH in the cleaning step is 11-13.

4. The method for manufacturing elastic denim garments according to claim 1, characterized in that, In the pre-shrinking process, the processing temperature is 110℃-130℃, and the vehicle speed is 40 m / min-50 m / min.

5. The method for manufacturing elastic denim garments according to claim 1, characterized in that, In the desizing process, the concentration of desizing enzyme is 6g / L-10g / L, the processing temperature is 45℃-55℃, and the machine speed is 60m / min-80m / min.

6. The method for manufacturing elastic denim garments according to claim 1, characterized in that, The post-processing steps also include loose flat washing, which is performed between desizing and pre-shrinking. The loose flat washing is performed at a temperature of 50℃-60℃ for a time of 10min-30min.

7. A type of elastic denim garment, characterized in that, Made by the method of making elastic denim garments according to any one of claims 1 to 6.

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