Cotton-polyester-spandex composite ice-wool elastic trousers and preparation method thereof

Abstract

The application discloses a Tencel-polyester-spandex composite ice-velvet elastic western-style trousers and a preparation method thereof. The western-style trousers are made of ice-velvet elastic four-way stretch fabric. The ice-velvet elastic four-way stretch fabric comprises warp yarn and weft yarn. The warp yarn is made of Tencel fiber-polyester fiber blended yarn, and the weft yarn is spandex fiber. In the ice-velvet elastic four-way stretch fabric, the components are in a mass ratio of 42-48 parts of Tencel fiber, 32-38 parts of polyester fiber and 12-18 parts of spandex fiber. The ice-velvet elastic four-way stretch fabric is subjected to ice-velvet finishing to form a velvet layer with a thickness of 0.1-0.3 mm. The application aims to provide a Tencel-polyester-spandex composite ice-velvet elastic western-style trousers. Through innovative fabric formula, high-density elastic weaving process and ice-velvet finishing technology, the performance of ice-cool velvet, 360-degree elastic, wrinkle-resistant and washable, soft and drape is realized, and the high-end western-style trousers product with comfort, wear resistance and style is created for business people.

Description

Technical Field

[0001] This invention belongs to the field of clothing and textile technology and is applicable to comfortable and durable trousers for high-end business scenarios. Specifically, it relates to a Tencel polyester spandex composite ice fleece elastic trousers and its preparation method. Background Technology

[0002] Currently, most mainstream trouser fabrics on the market are made of pure Tencel, polyester, or conventional blends, which have the following core technical defects: 1. Insufficient washability and wrinkle resistance: Traditional Tencel fabrics tend to turn white and wrinkle after 10 washes, requiring frequent ironing and maintenance, resulting in poor durability; 2. It is difficult to balance elasticity and fit: Regular dress pants fabrics have poor elasticity and are prone to deformation and constriction after sitting for a long time or making large movements, while high-elastic fabrics are prone to problems such as being soft and sagging and clinging to the legs, which affects the appearance of the business style. 3. Lack of cooling sensation and skin-friendly feel: It is hot and sticky to wear in summer, lacks skin-friendly cooling sensation, and cannot meet the comfort needs of long-term business scenarios; 4. Imbalance between drape and feel: Some fabrics are either too stiff and lack softness, or too soft and lack structure, making it difficult to achieve a "soft yet structured" wearing experience.

[0003] Therefore, there is an urgent need to develop a type of Tencel polyester spandex composite ice fleece elastic trousers that can simultaneously solve the four major pain points of cool touch, four-way high elasticity, wrinkle resistance and washability, and soft drape. Summary of the Invention

[0004] This invention aims to provide a Tencel-polyester-spandex composite velvet elastic trousers. Through innovative fabric formulation, high-density elastic weaving process and ice-feel finishing technology, it achieves a cool velvet feel, 360° elasticity, wrinkle resistance, washability, and soft drape, creating a high-end trousers product that is comfortable, durable, and stylish for business professionals.

[0005] The present invention is achieved as follows: a Tencel-polyester-spandex composite ice fleece elastic trousers, the trousers being made of ice fleece elastic four-way stretch fabric, the ice fleece elastic four-way stretch fabric including warp yarns and weft yarns, the warp yarns being a blend of Tencel fiber and polyester fiber, and the weft yarns being spandex fiber. In the ice-velvet stretch four-way stretch fabric, the components by mass ratio are: 42-48 parts Tencel fiber, 32-38 parts polyester fiber, and 12-18 parts spandex fiber. The surface of the ice-velvet stretch four-way stretch fabric is treated with an ice-feel finish to form a velvet layer with a thickness of 0.1-0.3mm.

[0006] This invention also provides a method for preparing a Tencel-polyester-spandex composite velvet elastic trousers, comprising the following steps: S1 yarn preparation: Prepare raw materials according to the following weight parts, including: 42-48 parts of Tencel fiber, 32-38 parts of polyester fiber, and 12-18 parts of spandex fiber. Blend the Tencel fiber and polyester fiber to obtain 120D / 2 warp yarn. Use spandex fiber as the core yarn and wrap it with short fibers to spin 70D spandex core-spun yarn as weft yarn. S2 High-Density Elastic Fabric: It is woven with a high-density air-jet loom with a warp density of 125-135 threads / inch and a weft density of 85-95 threads / inch. During the weaving process, sizing agent is added to the warp yarns. The sizing agent is a mixture of environmentally friendly modified starch and oligomeric acrylic acid. The weft tension fluctuation is controlled to ≤±5% to avoid excessive stretching of the spandex core-spun yarn and weft bowing, thus producing a four-way elastic fabric. S3 fabric pretreatment: The obtained four-way stretch fabric is subjected to bio-enzyme desizing treatment at a temperature of 55-65℃ and a pH value of 5.5-6.5; then it is treated with low-alkali bleaching agent at a bleaching temperature of 60-80℃ to avoid excessive fibrillation of Tencel and damage to the strength of spandex. S4 Ice-feel Fleece Finishing: The pre-treated four-way stretch fabric is first softened by spandex protectant, and then subjected to low-temperature hydrophilic cooling finishing and gentle napping process to form a 0.1-0.3mm fleece layer. S5 anti-wrinkle setting treatment: The four-way elastic fabric obtained above is first pre-shrinked at 160-170℃ to eliminate internal stress, then baked at 150-160℃ for 40-60s, and then subjected to relaxation wet heat setting to allow the spandex to fully shrink, thus obtaining the finished fabric. S6 ready-to-wear sewing: Cut according to the three-dimensional pattern, use spandex binding for the waistband and trouser hem, and reinforce key stress points with double lines to produce the finished trousers.

[0007] In one embodiment of the present invention, the Tencel fiber is A100 type Lyocell fiber, and the polyester fiber is cationic polyester filament.

[0008] As one embodiment of the present invention, the slurry in step S2 is a mixture of environmentally friendly modified starch and oligomeric acrylic acid in a weight ratio of 7:3-8:2, with a slurry application rate of 8%-11%.

[0009] In one embodiment of the present invention, in step S3: the biological enzyme is α-amylase, and the bleaching agent is 3-5 g / L hydrogen peroxide and 2-3 g / L chelating dispersant.

[0010] As one embodiment of the present invention, step S4, low-temperature hydrophilic cooling finishing, includes: using a menthol derivative cooling agent with a mass concentration of 30-50 g / L as the finishing liquid at 40-50°C, treating the fabric with a two-dip and two-ply method, controlling the padding rate at 65%-75%, and then drying at 40-80°C.

[0011] As one embodiment of the present invention, the gentle abrasive process uses a 120-180 mesh diamond roller and a machine speed of 18-22 m / min. Before abrasive abrasion, the spandex is treated with a pre-softening liquid containing amino-modified silicone oil to protect it.

[0012] In one embodiment of the present invention, the pre-softening liquid in step S4 is: 20-30 g / L of polyether modified amino silicone oil and 5-10 g / L of spandex protectant.

[0013] In one embodiment of the present invention, in step S5, the conditions for relaxation-type wet heat setting are saturated steam treatment at 100-105°C for 30-60 seconds.

[0014] As one embodiment of the present invention, the finished trousers have a weight of 220-280 g / m². 2 Cooling sensation value ≥0.3℃, elasticity recovery rate ≥90% after 10 washes.

[0015] The beneficial effects of this invention are: 1. This invention achieves a cool, velvety feel and 360° elasticity by blending Tencel, cationic polyester, and spandex in a specific ratio, combined with high-density weaving and a relaxed wet-heat setting process. A menthol derivative cooling agent imparts excellent cooling sensation to the fabric, and combined with a delicate fleece layer, it eliminates the sticky feeling of spandex fabric in summer while providing a pleasant, skin-friendly touch. 2. This invention combines spandex core-spun yarn structure with high-density weaving technology, and then uses relaxation-type wet heat setting technology to ensure that the fabric still has an elasticity recovery rate of ≥90% after 10 washes. This avoids the defects of traditional trousers, such as bulging at the knees and obvious leg marks after sitting for a long time, and ensures a comfortable experience under large movements. It also takes into account the coolness of summer wear and all-day comfort.

[0016] 3. This invention improves the dimensional stability and durability of the fabric by using polyester components and wrinkle-free shaping treatment. The high-density elastic weave process makes the pants stand out and maintain their shape in a natural state without becoming soft and clingy, meeting the stringent requirements for the silhouette in business settings. The fabric remains flat and wrinkle-free after 10 washes and does not show obvious whitening, greatly reducing the difficulty of daily care. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a flowchart of the preparation process of the present invention; Figure 2 This is a diagram showing the test results of the present invention; Figure 3 This is a test comparison chart of Embodiment 1 and the comparative example of the present invention. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] like Figures 1-3 As shown, the present invention provides a Tencel polyester spandex composite ice fleece elastic trousers and its preparation method.

[0022] A type of Tencel-polyester-spandex composite ice fleece elastic trousers, the trousers are made of ice fleece elastic four-way stretch fabric, the ice fleece elastic four-way stretch fabric includes warp yarns and weft yarns, the warp yarns are made of Tencel fiber-polyester fiber blend, and the weft yarns are spandex fiber; in the ice fleece elastic four-way stretch fabric, the components by mass ratio are: 42-48 parts of Tencel fiber, 32-38 parts of polyester fiber, and 12-18 parts of spandex fiber. The surface of the ice-velvet stretch four-way stretch fabric is treated with an ice-feel finish to form a velvet layer with a thickness of 0.1-0.3mm.

[0023] The present invention also provides a method for preparing a Tencel polyester spandex composite ice fleece elastic trousers, the specific implementation method of which is as follows.

[0024] Example 1: The preparation of a type of Tencel-polyester-spandex composite velvet elastic trousers specifically includes the following steps: S1 yarn preparation: Raw materials were weighed according to the following proportions by weight: 45 parts A100 type lyocell fiber, 35 parts cationic polyester filament, and 15 parts spandex fiber. The A100 type lyocell fiber and cationic polyester filament were blended by ring spinning to obtain a blended warp yarn with a specification of 120D / 2. Simultaneously, spandex filament was used as the core yarn, wrapped with cotton-type staple fibers to produce a 70D spandex core-spun yarn, which was used as the weft yarn.

[0025] S2 High-Density Elastic Fabric: This fabric is woven using a high-density air-jet loom. The process parameters are set as follows: warp density 130 ends / inch, weft density 90 ends / inch. During weaving, a sizing agent is applied to the warp yarns. This sizing agent is a mixture of environmentally friendly modified starch and oligomeric acrylic acid in a weight ratio of 7.5:2.5, with a controlled sizing rate of 9.5%. Weft tension is monitored in real-time during weaving to ensure fluctuations are ≤±5%, preventing weft bowing due to excessive stretching of the spandex core-spun yarn. The resulting fabric is a four-way elastic greige fabric.

[0026] S3 Fabric Pretreatment: The above-mentioned four-way stretch fabric undergoes bio-enzymatic desizing at a temperature of 60℃ and a pH value controlled at 6.0. Subsequently, a low-alkali bleaching treatment is performed, with the bleaching solution containing 4 g / L hydrogen peroxide and 2.5 g / L chelating dispersant, and the bleaching temperature set at 70℃. These process conditions effectively remove impurities while avoiding excessive fibrillation of Tencel and damage to the strength of spandex fibers.

[0027] S4 Ice-feel and Fleece Finishing: The pre-treated fabric is first immersed in a pre-softening liquid for padding treatment. The pre-softening liquid consists of 25g / L polyether-modified amino silicone oil and 8g / L spandex protectant.

[0028] The fabric is then subjected to a low-temperature hydrophilic cooling finish: at 45°C, a finishing solution containing 40g / L of menthol derivative cooling agent is used to treat the fabric through a two-dip and two-ply process, controlling the padding rate (ply rate) to 70%, and then drying at 100°C.

[0029] Next, a gentle napping process is performed: using a 150-mesh diamond roller and setting the speed to 20m / min, the fabric surface is napped to form a uniform nap layer with a thickness of about 0.2mm.

[0030] S5 anti-wrinkle setting treatment: The finished fabric is first pre-shrinked at 165℃ to eliminate internal stress, followed by baking at 155℃ for 50 seconds. Finally, it is introduced into 100℃ saturated steam for relaxation-type wet heat setting for 45 seconds, which promotes the full shrinkage of the spandex fibers, resulting in a dimensionally stable finished fabric. The finished fabric has a weight of 250 g / m². 2 .

[0031] S6 Garment Sewing: The finished fabric is cut according to the three-dimensional draping pattern. During the sewing process, spandex binding is used at the waistband and hem, and double-line reinforcement is applied at key stress points such as the knees and hips to produce the finished trousers.

[0032] Example 2: The preparation of a type of Tencel-polyester-spandex composite velvet elastic trousers specifically includes the following steps: S1 yarn preparation: Raw materials were weighed according to the following proportions by weight: 42 parts of A100 type lyocell fiber, 38 parts of cationic polyester filament, and 12 parts of spandex fiber. The A100 type lyocell fiber and cationic polyester filament were blended by ring spinning to obtain a blended warp yarn with a specification of 120D / 2. Simultaneously, spandex filament was used as the core yarn, wrapped with cotton-type staple fibers to produce a 70D spandex core-spun yarn, which was used as the weft yarn.

[0033] S2 High-Density Stretch Fabric: Woven using a high-density air-jet loom, with the following process parameters: warp density 125 ends / inch, weft density 85 ends / inch. The warp sizing agent is a mixture of environmentally friendly modified starch and oligomeric acrylic acid in a 7:3 weight ratio, with the sizing rate controlled at 8%. The weft tension fluctuation is controlled to ≤±5% during the weaving process, resulting in a four-way stretch fabric.

[0034] S3 fabric pretreatment: The fabric was desized using α-amylase at a temperature of 55℃ and a pH of 5.5. Subsequently, bleaching was performed using a bleach solution consisting of 3 g / L hydrogen peroxide and 2 g / L chelating dispersant at a temperature of 60℃ to complete the pretreatment.

[0035] S4 Cooling Finishing: The pre-treated fabric is immersed in a pre-softening liquid, which includes 20g / L of polyether-modified amino silicone oil and 5g / L of spandex protectant. After treatment, it enters the cooling finishing process: it is treated with a 30g / L menthol derivative cooling agent solution at 40℃ for two dips and two nips, with the nips and nips ratio controlled at 65%, and then dried at 80℃.

[0036] Then, the soft brushing process uses a 120-mesh diamond roller and a speed of 18m / min to form a velvety layer with a thickness of about 0.1mm.

[0037] S5 anti-wrinkle setting treatment: The finished fabric is first pre-shrinked at 160℃ to eliminate internal stress, and then baked at 150℃ for 50s.

[0038] Finally, the fabric was relaxed and heat-set under saturated steam at 100℃ for 30 seconds to obtain the finished fabric. The resulting fabric had a weight of 220 g / m². 2 .

[0039] S6 Garment Sewing: Cut the finished fabric according to the three-dimensional draping pattern, and follow the same steps as in Example 1.

[0040] Comparative example: Traditional Tencel trousers were used as a comparison for a comparative test.

[0041] Cooling sensation tests were conducted on Example 1, Example 2, and traditional Tencel trousers respectively: Cooling sensation test method: To verify the instantaneous cooling performance of the fabric described in this invention, the following tests were conducted in accordance with the national standard "Test and Evaluation of Instantaneous Cooling Performance of Textiles" (GB / T35263-2017): After conditioning, the fabric was placed in a contact temperature and humidity sensor for testing. The ambient temperature was 20±2℃, and the humidity was 65±4%.

[0042] The hot plate temperature is set to 35°C, the sample temperature of the example to be tested is 20°C, the temperature difference ΔT = 15°C, and the contact pressure is 10 gf / cm. 2 Record the maximum heat flux Q-max value within 0.2s of the instant of contact, and take the average value after 10 samples.

[0043] Test results are as follows Figure 3 As shown: The Q-max value of the fabric in Example 1 is 0.36 W / cm². 2 The cooling sensation value is 0.36℃.

[0044] The Q-max value of the fabric in Example 2 is 0.33 W / cm. 2 The cooling sensation value is 0.33℃.

[0045] The Q-max value of traditional Tencel trousers is 0.11 W / cm². 2 The cooling sensation value is 0.11℃.

[0046] The following tests were conducted on Example 1, Example 2, and traditional Tencel trousers, each with 10 washes: Washing test method: According to GB / T3921-2008 standard, the fabric was washed 10 times using a standard household washing program at 40℃, then air-dried and conditioned under standard conditions. Subsequently, the fabric's crease recovery performance was tested according to GB / T3819-1997.

[0047] Test results are as follows Figure 3 As shown in the test results, the Tencel polyester spandex composite ice fleece elastic trousers prepared by the present invention are significantly superior to traditional Tencel trousers in terms of cooling sensation, elasticity, wrinkle resistance, drape and skin-friendliness.

[0048] 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.

[0049] 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 Tencel, polyester, and spandex composite velvet elastic trousers, characterized in that, The trousers are made of ice-velvet elastic four-way stretch fabric, which includes warp yarns and weft yarns. The warp yarns are made of Tencel fiber-polyester fiber blend, and the weft yarns are spandex fiber. The ice-velvet elastic four-way stretch fabric has the following components in the following mass ratio: 42-48 parts of Tencel fiber, 32-38 parts of polyester fiber, and 12-18 parts of spandex fiber. The surface of the ice-velvet elastic four-way stretch fabric is treated with an ice-feel velvet finish to form a velvet layer with a thickness of 0.1-0.3mm.

2. A method for preparing a Tencel-polyester-spandex composite velvet elastic trousers, used to prepare the Tencel-polyester-spandex composite velvet elastic trousers as described in claim 1, characterized in that, Includes the following steps: S1 yarn preparation: Prepare raw materials according to the following weight parts, including: 42-48 parts of Tencel fiber, 32-38 parts of polyester fiber, and 12-18 parts of spandex fiber. Blend the Tencel fiber and polyester fiber to obtain 120D / 2 warp yarn. Use spandex fiber as the core yarn and wrap it with short fibers to spin 70D spandex core-spun yarn as weft yarn. S2 High-Density Elastic Fabric: It is woven with a high-density air-jet loom with a warp density of 125-135 threads / inch and a weft density of 85-95 threads / inch. During the weaving process, sizing agent is added to the warp yarns. The sizing agent is a mixture of environmentally friendly modified starch and oligomeric acrylic acid. The weft tension fluctuation is controlled to ≤±5% to avoid excessive stretching of the spandex core-spun yarn and weft bowing, thus producing a four-way elastic fabric. S3 fabric pretreatment: The obtained four-way stretch fabric is subjected to bio-enzyme desizing treatment at a temperature of 55-65℃ and a pH value of 5.5-6.5; then it is treated with low-alkali bleaching agent at a bleaching temperature of 60-80℃ to avoid excessive fibrillation of Tencel and damage to the strength of spandex. S4 Ice-feel Fleece Finishing: The pre-treated four-way stretch fabric is first softened by spandex protectant, and then subjected to low-temperature hydrophilic cooling finishing and gentle napping process to form a 0.1-0.3mm fleece layer. S5 anti-wrinkle setting treatment: The four-way elastic fabric obtained above is first pre-shrinked at 160-170℃ to eliminate internal stress, then baked at 150-160℃ for 40-60s, and then subjected to relaxation wet heat setting to allow the spandex to fully shrink, thus obtaining the finished fabric. S6 ready-to-wear sewing: Cut according to the three-dimensional pattern, use spandex binding for the waistband and trouser hem, and reinforce key stress points with double lines to produce the finished trousers.

3. The preparation method of the Tencel-polyester-spandex composite velvet elastic trousers according to claim 2, characterized in that, The Tencel fiber is A100 type Lyocell fiber, and the polyester fiber is cationic polyester filament.

4. The preparation method of the Tencel-polyester-spandex composite velvet elastic trousers according to claim 2, characterized in that, The slurry in step S2 is a mixture of environmentally friendly modified starch and oligoacrylic acid in a weight ratio of 7:3-8:2, with a slurry application rate of 8%-11%.

5. The method according to claim 2, characterized in that, In step S3: the biological enzyme is α-amylase, and the bleaching agent is 3-5 g / L hydrogen peroxide and 2-3 g / L chelating dispersant.

6. The preparation method of the Tencel-polyester-spandex composite velvet elastic trousers according to claim 2, characterized in that, The step S4 low-temperature hydrophilic cooling finishing includes: using a menthol derivative cooling agent with a mass concentration of 30-50 g / L as the finishing liquid at 40-50℃, treating the fabric with a two-dip and two-ply method, controlling the padding rate at 65%-75%, and then drying at 40-80℃.

7. The preparation method of the Tencel-polyester-spandex composite velvet elastic trousers according to claim 6, characterized in that, The gentle abrasive process uses a 120-180 mesh diamond roller and a speed of 18-22 m / min. Before abrasive abrasion, the spandex is treated with a pre-softening liquid containing amino-modified silicone oil to protect it.

8. The preparation method of the Tencel-polyester-spandex composite velvet elastic trousers according to claim 7, characterized in that, The pre-softening liquid in step S4 is: 20-30 g / L of polyether-modified amino silicone oil and 5-10 g / L of spandex protectant.

9. The preparation method of the Tencel-polyester-spandex composite velvet elastic trousers according to claim 2, characterized in that, In step S5: the conditions for relaxation-type wet heat setting are saturated steam treatment at 100-105℃ for 30-60 seconds.

10. The method for preparing the Tencel-polyester-spandex composite velvet elastic trousers according to claim 2, characterized in that, The finished trousers weigh 220-280g / m². 2 Cooling sensation value ≥0.3℃, elasticity recovery rate ≥90% after 10 washes.

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