Double-core elastic anti-bulge easy-to-clean trousers and preparation method thereof

Abstract

This invention discloses a dual-core elastic anti-bubbling and easy-to-clean trousers and its preparation method. The trousers are made from an anti-bubbling and easy-to-clean fabric, which is woven from a dual-core elastic blended yarn and undergoes anti-bubbling shaping treatment, abrasion-resistant reinforcement treatment, and easy-to-clean finishing. The dual-core elastic blended yarn includes a skin-friendly outer layer and an elastic core layer. The elastic core layer is a dual-core elastic blended yarn formed by melt spinning of high-elastic yarn and spandex filament. The skin-friendly outer layer covers the elastic core layer and is made of cellulose fiber. The porosity of the anti-bubbling and easy-to-clean fabric is 25%-30%. The high-elastic yarn is polyester high-elastic filament or nylon high-elastic filament with a fineness of 40D-70D. The weight ratio of high-elastic yarn to spandex filament is 1.5-2.5:1. This invention solves the problems of imbalance between elasticity and stability, contradiction between abrasion resistance and comfort, single function, and insufficient elasticity durability in traditional elastic trousers.

Description

Technical Field

[0001] This invention relates to the field of clothing, specifically to a dual-core elastic anti-bulging and easy-to-clean trousers and its preparation method. Background Technology

[0002] As a core garment for business commuting and professional settings, dress pants must maintain a crisp and stylish appearance while also providing comfort and freedom of movement for extended wear. With the diversification of professional settings, users' functional demands for dress pants are increasing. Four-way elasticity, abrasion resistance, and anti-bubble properties have become core requirements, while the fabric must also be lightweight to achieve a "zero-weight" wearing experience.

[0003] Currently, most elastic trousers use a single spandex filament as the elastic component, or a simple blend of ordinary elastic fibers. Although this provides basic elasticity, there are obvious technical bottlenecks.

[0004] The shortcomings of existing dress pants: 1. Imbalance between elasticity and stability: The single elastic fiber structure is difficult to balance high elasticity and shape stability. After wearing for a long time, key areas such as the knees and buttocks are prone to "bulges" and deformation due to repeated bending and stretching, which cannot be restored to their original shape and affect the appearance. 2. Conflict between abrasion resistance and comfort: Increasing fabric thickness or using hard fibers to improve abrasion resistance will result in a heavy feeling when wearing the garment and reduced breathability, making it easy to feel stuffy and damp after sitting for a long time. 3. Limited functionality: Most elastic trousers only focus on improving elasticity and lack comprehensive functions such as wear resistance and easy stain removal, making it difficult to meet the needs of frequent activities and accidental stains in professional settings; 4. Insufficient elasticity: After repeated washing and wearing, the elastic fibers of ordinary elastic fabrics are prone to aging and breakage, resulting in a decrease in four-way elasticity and loss of the ability to stretch freely.

[0005] To address the shortcomings of existing dress pants, a method for preparing dual-core elastic anti-bubbling and easy-to-clean dress pants is provided. Summary of the Invention

[0006] This invention provides a dual-core elastic anti-bulging trouser fabric and finished trousers, solving the problems of imbalance between elasticity and stability, contradiction between wear resistance and comfort, single function, and insufficient elasticity durability of traditional elastic trousers.

[0007] The present invention is achieved as follows: a double-core elastic anti-bubble and easy-to-clean trousers, the trousers being prepared from an anti-bubble and easy-to-clean fabric, the anti-bubble and easy-to-clean fabric being woven from a double-core elastic blended yarn, and sequentially undergoing anti-bubble setting treatment, abrasion resistance strengthening treatment, and easy-to-clean finishing; the double-core elastic blended yarn includes a skin-friendly outer layer and an elastic core layer, the elastic core layer being a double-core elastic blended yarn formed by melt spinning of high-elastic yarn and spandex filament, the skin-friendly outer layer covering the elastic core layer, the skin-friendly outer layer being made of cellulose fiber, and the fabric porosity of the anti-bubble and easy-to-clean fabric being 25%-30%.

[0008] In one embodiment of the present invention, the high-elastic yarn is polyester high-elastic filament or nylon high-elastic filament, and the fineness of the high-elastic yarn is 40D-70D; the weight ratio of the high-elastic yarn to the spandex filament is 1.5-2.5:1.

[0009] As one embodiment of the present invention, the anti-bubbling and easy-to-clean fabric comprises the following components by weight percentage: 55%-70% cellulose fiber, 15%-25% high-elastic yarn, 8%-15% spandex filament, and 1-5% functional masterbatch.

[0010] As one embodiment of the present invention, the anti-bubbling and easy-to-clean fabric has a high-count, high-density twill weave structure with a warp density of 130-150 yarns / inch and a weft density of 110-130 yarns / inch. The high-count, high-density twill weave structure includes 3 / 1 left twill weave, and its warp and weft elastic recovery rate is ≥95%.

[0011] As one embodiment of the present invention, a locally densely woven area is provided on the anti-bubbling and easy-to-clean fabric, and the density of warp and weft interlacing points in the locally densely woven area is increased by 15%-20% compared with the ordinary area.

[0012] This invention also provides a method for preparing dual-core elastic anti-bulging and easy-to-clean trousers. As one embodiment of this invention, it includes the following steps: Preparation of S1 dual-core elastic yarn: Select 55-70 parts of cellulose fiber, 15-25 parts of high elastic yarn, 6-10 parts of spandex filament, and 1-5 parts of functional masterbatch by weight ratio. High-elastic yarn and spandex filament are combined through a parallel composite spinning process to form an elastic core layer. Then, cellulose fibers are wrapped around the outer layer of the elastic core layer through a compact spinning process to form a double-core elastic blended yarn. S2 fabric weaving: using double-core elastic blended yarn as warp and weft yarns, and weaving with a pre-set twill structure, and during the weaving process, locally denser weaving areas are woven at the knee and hip positions to obtain the preliminary woven fabric. S3 Anti-bubbling Shaping Treatment: The initial woven fabric is subjected to anti-bubbling shaping treatment: the fabric is high-temperature sizing at 160℃-180℃, followed by low-temperature relaxation at 80℃-90℃. S4 Abrasion Reinforcement Treatment: The surface of the fabric after the above anti-bulging shaping treatment is sprayed with a nano-ceramic abrasion-resistant coating with a thickness not exceeding 5μm; S5 Easy-to-clean finish: The fabric after the above abrasion-resistant reinforcement treatment is immersed in a fluorocarbon resin finishing agent with a solid content of 20%-30%, then baked at 150℃-160℃, and softened after cooling to finally obtain an anti-bubbling and easy-to-clean fabric. S6 3D Cutting: The fabric is cut according to the 3D cutting scheme to prevent bulging and easy stain removal. The knee thong uses a special arc-shaped 3D cutting. Then it is sewn with an unlined, thin waistband and lightweight stitching. The waistband uses a high-elastic band and double-core elastic fabric integrated design. The trouser legs use a seamless overlocking process. S7 Quality Inspection and Shaping: Finish the trousers and perform final quality inspection to check the seam strength, then iron and shape them.

[0013] As one embodiment of the present invention, the anti-bulging shaping treatment specifically involves: shaping the initially woven fabric at 170°C for 25-35 seconds, followed by relaxing it at 85°C for 15-25 seconds. As one embodiment of the present invention, the easy-to-clean finishing process specifically involves: immersing the abrasion-resistant reinforced fabric in a fluorocarbon resin finishing agent with a solid content of 20%-30% for 5-20 seconds, followed by baking at 155°C for 35-45 seconds.

[0014] As one embodiment of the present invention, the softening treatment step in step S5 includes: impregnating the fabric with 5% silicone oil softener and drying it at 80°C.

[0015] As one embodiment of the present invention, the weight of the anti-bubbling and easy-to-clean fabric is ≤350g / m². 2 After 50 washes, the height of the knee bulge is ≤2mm, and the Martindale abrasion resistance is ≥8000 cycles.

[0016] The beneficial effects of this invention are: 1. The dual-core elastic anti-bulging and easy-to-clean trousers obtained by this invention have excellent anti-bulging properties and shape stability. By setting a dual-core elastic blended yarn structure, locally dense weave design, and "high-temperature setting-low-temperature relaxation" treatment process, the entire fabric achieves an extremely high elastic recovery rate of ≥95%. Simulated long-term wear and washing (after 50 standard washes) tests show that the knee bulge height can be effectively controlled at an extremely low level of ≤2.0mm, significantly solving the problem of permanent deformation and arching at the knee of traditional elastic trousers. This gives the fabric long-term shape retention, meets the needs of large-scale activities such as squatting and running, and is suitable for all postures in professional settings. 2. The dual-core elastic anti-bulging and easy-to-clean trousers of this invention have outstanding durability and ease of care. Through the surface nano-ceramic wear-resistant coating treatment, the Martindale fabric has an abrasion resistance of more than 20,000 times, significantly improving its abrasion resistance. The lightweight fabric and lightweight structural design, combined with the easy-to-clean finish of fluorocarbon resin, give the fabric excellent protection and easy removal of common oil stains, with an easy-to-clean rating of ≥4. Moreover, the easy-to-clean performance can be maintained after multiple washes, greatly improving the practical life of the garment and the convenience of daily care.

[0017] 3. While achieving high strength and functionality, the fabric of this invention maintains a strength of ≤350g / m² through high-count, high-density weaving and a hydrophilic, soft finishing process. 2 It boasts an appropriate weight, a porosity of 25%-30%, and an excellent soft feel. Furthermore, its high overall comfort rating meets the dual demands of high-end business casual wear for both performance and comfort. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention, making other features, objects, and characteristics of the invention more apparent. The illustrative embodiments of the invention, along with their descriptions, are used to explain the invention and do not constitute an undue limitation of the invention.

[0019] Figure 1 These are the anti-bulging test results of Comparative Example 1 and Example 1 of the present invention; Figure 2 This is a graph showing the test data results of the present invention; Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] like Figures 1-2 As shown, this embodiment provides a pair of double-core elastic anti-bubble and easy-to-clean trousers. The trousers are made from anti-bubble and easy-to-clean fabric, which is woven from double-core elastic blended yarn and undergoes anti-bubble shaping treatment, abrasion-resistant reinforcement treatment, and easy-to-clean finishing in sequence.

[0023] The anti-bubbling and easy-to-clean fabric comprises the following components by weight percentage: 55%-70% cellulose fiber, 15%-25% high-elastic yarn, 8%-15% spandex filament, and 1-5% functional masterbatch. The weight ratio of high-elastic yarn to spandex filament is 2.5:1.

[0024] Specifically, the dual-core elastic blended yarn includes a skin-friendly outer layer and an elastic core layer. The elastic core layer is a dual-core elastic blended yarn formed by melt spinning of high-elastic yarn and spandex filament. The skin-friendly outer layer covers the elastic core layer and is made of cellulose fiber. The fabric porosity of the anti-bubbling and easy-to-clean fabric is 25%-30%.

[0025] High-elasticity yarns of 40D-70D are combined with spandex filaments in parallel using melt spinning technology to form a double-core elastic blended yarn with a permanent helical crimp structure, which serves as the elastic core layer of the yarn. Cellulose fibers are then evenly wrapped around the outer periphery of the elastic core layer to form a core-spun double-core elastic blended yarn.

[0026] The double-core elastic blended yarn is used as both warp and weft. A 3 / 1 left twill weave is used as the base structure and woven on a loom. The warp density is set at 135 ends / inch and the weft density at 115 ends / inch to form a high-count, high-density twill fabric base.

[0027] During the weaving process, through program control, the fabric structure is locally densified in the areas corresponding to the knees and hips of the finished trousers. Specifically, by increasing the weft float or adjusting the heddle threading method, the density of warp and weft interlacing points in this locally densified area is increased by about 15-20% compared to the ordinary areas of the fabric, thereby achieving higher structural density and resistance to deformation in these areas that are prone to stretching and friction.

[0028] This invention also provides a method for preparing dual-core elastic anti-bulging and easy-to-clean trousers, comprising the following steps: Preparation of S1 dual-core elastic yarn: Select 55-70 parts of cellulose fiber, 15-25 parts of high elastic yarn, 6-10 parts of spandex filament, and 1-5 parts of functional masterbatch by weight ratio. High-elastic yarn and spandex filament are combined through a parallel composite spinning process to form an elastic core layer. Then, cellulose fibers are wrapped around the outer layer of the elastic core layer through a compact spinning process to form a double-core elastic blended yarn. S2 fabric weaving: using double-core elastic blended yarn as warp and weft yarns, and weaving with a pre-set twill structure, and during the weaving process, locally denser weaving areas are woven at the knee and hip positions to obtain the preliminary woven fabric. S3 Anti-bubbling Shaping Treatment: The initial woven fabric is subjected to anti-bubbling shaping treatment. The fabric is high-temperature sizing at 160℃-180℃, followed by low-temperature relaxation at 80℃-90℃. S4. Wear-resistant strengthening treatment: Spray a nano-ceramic wear-resistant coating with a thickness of no more than 5μm onto the surface of the fabric after the above anti-bulging shaping treatment. S5. Easy-to-clean finish: The fabric after the above abrasion-resistant reinforcement treatment is immersed in a fluorocarbon resin finishing agent with a solid content of 20%-30%, and then baked at 150℃-160℃. After cooling, it is softened to finally obtain an anti-bubbling and easy-to-clean fabric. S6. Three-dimensional tailoring: The fabric is cut according to the three-dimensional tailoring scheme to prevent bulging and easy stain removal. The knee trousers are specially cut with a curved three-dimensional tailoring. Then, the trousers are sewn with an unlined, thin waistband and lightweight stitching. The waistband is designed with a high-elastic band and double-core elastic fabric. The trouser legs are finished with a seamless overlocking process. S7. Quality Inspection and Shaping: Finish the trousers and perform a final quality inspection to check the seam strength, then iron and shape them.

[0029] The anti-bubbling shaping treatment is as follows: the preliminary woven fabric is shaped at 170℃ for 25-35 seconds, and then relaxed at 85℃ for 15-25 seconds. The easy-to-clean finishing process involves immersing the abrasion-resistant reinforced fabric in a fluorocarbon resin finishing agent with a solid content of 20%-30% for 5-20 seconds, followed by baking at 155℃ for 35-45 seconds.

[0030] The softening process in step S5 includes: impregnating the fabric with a silicone oil softener and then drying it at a low temperature.

[0031] The weight of the anti-bubbling and easy-to-clean fabric is ≤350g / m². 2 After 50 washes, the height of the knee bulge is ≤2mm, and the Martindale abrasion resistance is ≥8000 cycles. Specific Implementation Example 1: Preparation of S1 dual-core elastic yarn: 65 parts of cellulose fiber, 20 parts of polyester high-elastic filament, 12 parts of 40D spandex filament, and 3 parts of anti-aging and antibacterial functional masterbatch were selected according to weight percentage. The weight ratio of nylon high-elastic filament to 70D spandex filament was 1.67:1.

[0033] Polyester high-elastic filament and 40D spandex filament are combined at the molecular level through a parallel composite spinning machine at a melting temperature of 280℃ to form a double-core fiber; cellulose fiber is coated on the outer layer of the double-core fiber using a compact spinning process to prepare a 160S double-core elastic blended yarn.

[0034] S2 fabric weaving: The double-core elastic blended yarn is used as the warp and weft yarns, and a 3 / 1 left twill weave is adopted. The warp density is 140 ends / inch and the weft density is 120 ends / inch. The 160S blended yarn is used in both the warp and weft directions. The warp and weft interlacing points in the knee and hip areas are increased by 18%.

[0035] S3 Anti-bubbling and shaping treatment: The preliminary woven fabric is subjected to anti-bubbling and shaping treatment. The fabric is high-temperature shaped at 170℃ and then low-temperature relaxed for 20 seconds at 85℃. S4 Abrasion-resistant strengthening treatment: The surface of the fabric after the above anti-bubbling shaping treatment is sprayed with a 5μm thick nano-ceramic abrasion-resistant coating and dried at 120℃. S5 Easy-to-clean finish: The abrasion-resistant reinforced fabric is immersed in a fluorocarbon resin finishing agent with a solid content of 25%, then baked at 155℃ for 40 seconds, cooled and softened, then immersed in 5% silicone oil softener, and dried at 80℃ to finally obtain an anti-bubbling and easy-to-clean fabric. S6 3D Cutting: The fabric is cut according to the 3D cutting scheme to prevent bulging and easy stain removal. The knee trousers are cut with a special curved 3D cutting. Then, the trousers are sewn together with a thin waistband and lightweight stitching. The waistband is sewn with a 2cm high elastic band and the fabric is sewn together. The hem is seamlessly overlocked. The finished size 32 weighs 320g.

[0036] S7. Quality Inspection and Shaping: Finish the trousers and perform a final quality inspection to check the seam strength, including: elastic recovery rate of 96%, knee bulge height of 1.5mm, Martindale abrasion resistance of 22,000 cycles, and oil stain residue rate of 3%. Then iron and shape them.

[0037] Example 2, based on Example 1, with other preparation conditions remaining unchanged, makes the following modifications: In S1: 58 parts by weight percentage of cellulose fiber, 24 parts by weight percentage of polyester high-elastic filament, 12 parts by weight percentage of 70D spandex filament, and 4 parts by weight percentage of anti-aging and antibacterial masterbatch. The weight ratio of nylon high-elastic filament to 70D spandex filament is 2:1.

[0038] In the S2 fabric weaving process: warp density is 135 yarns / inch, weft density is 115 yarns / inch, and the interlacing points in locally denser areas are increased by 15%.

[0039] S7 Quality Inspection and Shaping: Finished trousers are finished and the final quality inspection is carried out to check the seam strength, including: elastic recovery rate of 96%, knee bulge height of 1.8mm, Martindale abrasion resistance of 25,000 cycles, oil stain residue rate of 4%, and the weight of size 32 finished product of 340g.

[0040] Comparative Example 1: Standard elastic trousers in the industry, specifically composed of 55% cotton + 42% polyester fiber + 3% spandex, with a weight of 450g / m². 2 .

[0041] Tests were conducted on Examples 1, 2, and 1, as detailed in the appendix to the instruction manual. Figure 2 .

[0042] The following tests will be conducted respectively: 1. Four-sided elastic recovery rate test: Cut at least three warp and three weft samples (standard size) from the finished fabric. Using a universal testing machine, stretch the samples to 20% elongation, hold for 10 seconds, unload, let stand for 1 minute, and then measure their recovery length. Calculate the elastic recovery rate using the formula.

[0043] 2. Knee bulge height detection (after 50 washes) Perform 50 standard washes and dry the knee sample or finished trousers, which are sewn into a cylindrical shape. Lay the sample flat and use a laser rangefinder to measure the vertical distance between the highest point of the knee bend center and the plane; this distance is the bulge height.

[0044] 3. Martindale Abrasion Resistance Test: Cut a circular sample with a diameter of 38mm from the fabric. Test the sample on a Martindale abrasion tester using 9kPa pressure and standard wool fabric as the abrasive. Record the number of abrasion cycles until holes appear on the sample surface or yarn breaks; this number should be ≥8000 cycles.

[0045] 4. Fabric weight measurement: Cut a 100cm section from the finished fabric. 2 The sample was weighed using an electronic balance with an accuracy of 0.01 g, and the mass per unit area (g / m²) was calculated. 2 ).

[0046] 5. Stain Removal Performance Test: Apply standard olive oil to the fabric surface and let it stand for 5 minutes. Wipe the fabric 10 times with a standard white cloth dampened with water, applying constant pressure. Measure the color difference between the test area before and after cleaning using a colorimeter, or have a grader assess the stain removal level against a standard gray card.

[0047] 6. Subjective evaluation of wearing comfort: A professional evaluation team of no fewer than 5 people will try on the finished dress trousers under standard conditions and conduct simulated daily activities. The comfort level will be rated on a 10-point scale across four dimensions: "zero weight," "no restriction," "soft to the touch," and "breathability." An average score above 9.0 is considered excellent comfort.

[0048] According to the instruction manual Figures 1-2 The following conclusions were drawn: Figure 1 The left side shows the anti-bulging test of Comparative Example 1. Figure 1 The right side shows the anti-bubble test of the dual-core elastic anti-bubble and easy-to-clean fabric obtained by the present invention. After 50 washing tests, the conventional elastic trousers on the left side of the figure show obvious bubbling on the surface, while the fabric of the present invention on the right side of the figure remains smooth and flat after 50 washing tests, basically unchanged.

[0049] The dual-core elastic anti-bulging and easy-to-clean trousers obtained by this invention have excellent anti-bulging properties and shape stability. By setting a dual-core elastic blended yarn structure, locally dense weave design, and "high-temperature setting-low-temperature relaxation" treatment process, the entire fabric achieves an extremely high elastic recovery rate of ≥95%. Simulated long-term wear and washing tests (after 50 standard washes) show that the knee bulge height can be effectively controlled at an extremely low level of ≤2.0mm, significantly solving the problem of permanent deformation and arching at the knee of traditional elastic trousers. This gives the fabric long-term shape retention, meets the needs of large-scale activities such as squatting and running, and is suitable for all postures in professional settings. The dual-core elastic anti-bulging and easy-to-clean trousers of this invention are outstanding in durability and ease of care. Through the surface treatment with a nano-ceramic abrasion-resistant coating, the Martindale fabric can withstand more than 20,000 abrasion cycles, significantly improving abrasion resistance. The lightweight fabric and lightweight structural design, combined with the easy-to-clean finish of fluorocarbon resin, give the fabric excellent protection and easy removal of common oil stains, with an easy-to-clean rating of ≥4. Moreover, the easy-to-clean performance can be maintained after multiple washes, greatly improving the practical life of the garment and the convenience of daily care.

[0050] While achieving high strength and functionality, the fabric of this invention maintains a weight of ≤350g / m² through high-count, high-density weaving and a hydrophilic, soft finishing process. 2 It boasts an appropriate weight, a porosity of 25%-30%, and an excellent soft feel. Furthermore, its high overall comfort rating meets the dual demands of high-end business casual wear for both performance and comfort.

[0051] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0052] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A type of double-core elastic anti-bulging, easy-to-clean dress trousers, characterized in that, The trousers are made from an anti-bubbling and easy-to-clean fabric, which is woven from a dual-core elastic blended yarn and undergoes anti-bubbling setting treatment, abrasion resistance strengthening treatment, and easy-to-clean finishing. The dual-core elastic blended yarn includes a skin-friendly outer layer and an elastic core layer. The elastic core layer is a dual-core elastic blended yarn formed by melt spinning of high-elastic yarn and spandex filament. The skin-friendly outer layer covers the elastic core layer and is made of cellulose fiber. The porosity of the anti-bubbling and easy-to-clean fabric is 25%-30%.

2. The dual-core elastic anti-bulge, easy-to-clean trousers according to claim 1, characterized in that, The high-elastic yarn is polyester high-elastic filament or nylon high-elastic filament, and the fineness of the high-elastic yarn is 40D-70D; the weight ratio of the high-elastic yarn to the spandex filament is 1.5-2.5:

1.

3. The dual-core elastic anti-bulge, easy-to-clean trousers according to claim 2, characterized in that, By weight percentage, the anti-bubbling and easy-to-clean fabric comprises the following components: 55%-70% cellulose fiber, 15%-25% high-elastic yarn, 8%-15% spandex filament, and 1-5% functional masterbatch.

4. The dual-core elastic anti-bulge, easy-to-clean trousers according to claim 1, characterized in that, The anti-bubbling and easy-to-clean fabric has a high-count, high-density twill weave structure with a warp density of 130-150 yarns / inch and a weft density of 110-130 yarns / inch. The high-count, high-density twill weave structure includes 3 / 1 left twill weave, and its warp and weft elastic recovery rate is ≥95%.

5. The dual-core elastic anti-bulge, easy-to-clean trousers according to claim 4, characterized in that, The anti-bubbling and easy-to-clean fabric has a locally denser weave area, where the density of warp and weft interlacing points is increased by 15%-20% compared to the ordinary area.

6. A method for preparing a dual-core elastic anti-bulge, easy-to-clean trousers as described in any one of claims 1-5, characterized in that, Includes the following steps: Preparation of S1 dual-core elastic yarn: Select 55-70 parts of cellulose fiber, 15-25 parts of high elastic yarn, 6-10 parts of spandex filament, and 1-5 parts of functional masterbatch by weight ratio. High-elastic yarn and spandex filament are combined through a parallel composite spinning process to form an elastic core layer. Then, cellulose fibers are wrapped around the outer layer of the elastic core layer through a compact spinning process to form a double-core elastic blended yarn. S2 Fabric Weaving: The double-core elastic blended yarn is used as the warp and weft yarns, and a preset twill weave is used for weaving. During the weaving process, a locally denser weave area is woven at the knee and hip positions to obtain a preliminary woven fabric. S3 Anti-bubbling shaping treatment: The preliminary woven fabric is subjected to anti-bubbling shaping treatment: the fabric is high-temperature shaped at 160℃-180℃, and then low-temperature relaxation is performed at 80℃-90℃. S4 Abrasion Reinforcement Treatment: The surface of the fabric after the above anti-bulging shaping treatment is sprayed with a nano-ceramic abrasion-resistant coating with a thickness not exceeding 5μm; S5 Easy-to-clean finish: The fabric after the above abrasion-resistant reinforcement treatment is immersed in a fluorocarbon resin finishing agent with a solid content of 20%-30%, then baked at 150℃-160℃, and softened after cooling to finally obtain an anti-bubbling and easy-to-clean fabric. S6 3D Cutting: The fabric is cut according to the 3D cutting scheme to prevent bulging and easy stain removal. The knee thong uses a special arc-shaped 3D cutting. Then it is sewn with an unlined, thin waistband and lightweight stitching. The waistband uses a high-elastic band and double-core elastic fabric integrated design. The trouser legs use a seamless overlocking process. S7 Quality Inspection and Shaping: Finish the trousers and perform final quality inspection to check the seam strength, then iron and shape them.

7. The preparation method according to claim 6, characterized in that, The anti-bubbling shaping treatment specifically involves shaping the initially woven fabric at 170°C for 25-35 seconds, followed by relaxing it at 85°C for 15-25 seconds.

8. The preparation method according to claim 6, characterized in that, The easy-to-clean finishing process specifically involves immersing the abrasion-resistant reinforced fabric in a fluorocarbon resin finishing agent with a solid content of 20%-30% for 5-20 seconds, followed by baking at 155℃ for 35-45 seconds.

9. The preparation method according to claim 6, characterized in that, The softening process in step S5 includes: impregnating the fabric with 5% silicone oil softener and drying it at 80°C.

10. The preparation method according to claim 6, characterized in that, The weight of the anti-bubbling and easy-to-clean fabric is ≤350g / m². 2 After 50 washes, the height of the knee bulge is ≤2mm, and the Martindale abrasion resistance is ≥8000 cycles.

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