Preparation method of cotton spandex core-spun yarn-dyed spandex fabric

Abstract

The invention belongs to the technical field of textile printing and dyeing, and particularly relates to a preparation method of a cotton spandex core-spun yarn-dyed spandex fabric. Comprising the following steps of raw yarn spooling, yarn steaming, warping, dyeing, slashing, weaving and after-finishing. The grey yarns are cotton spandex core-spun yarns; in the grey yarn spooling process, the weight of the yarns is 0.3-0.5 kg, and the density of the yarns is 0.40-0.45 g / m < 3 >; in the yarn steaming process, the yarn steaming temperature ranges from 125 DEG C to 135 DEG C, and the yarn steaming time ranges from 20 min to 35 min; the after-finishing process comprises the steps of singeing, loose desizing, mercerizing, tentering and preshrinking. According to the preparation method, a'sandwich 'material does not need to be added, and high-temperature setting does not need to be carried out in an after-finishing processing stage, so that the technological process is remarkably shortened, the operation steps are simplified, the production efficiency is improved, the production cost is saved, and meanwhile, the problem of warp blistering caused by dyed yarn warping and the change degree of the fabric color are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of textile printing and dyeing, and particularly relates to a method for preparing a cotton-spandex core-spun yarn-dyed four-way stretch fabric. Background Art

[0002] With the development of society and the improvement of people's living standards, people's requirements for the comfort of clothing are increasing. In terms of fabric selection, compared with traditional woven cotton fabrics, stretch fabrics are more popular with consumers due to their good elasticity and wearing experience, especially four-way stretch fabrics. Four-way stretch fabrics have good elasticity in all directions, bringing unprecedented comfort to the wearer.

[0003] However, for yarn-dyed fabrics, the processing difficulty is relatively large, especially in the process of yarn dyeing and fabric processing, which requires more precise control. Currently, there are mainly two processing methods for four-way stretch fabrics on the market: The first method is the elastic yarn transfer dyeing method. This method has a long process flow and relatively complex operation, resulting in low production efficiency. After dyeing, the colored yarn needs to be warped and beamed, and dry setting treatment is required in the finishing process to improve shrinkage and warp bubbling problems. However, even after these treatments, it is still difficult to completely avoid the problem of warp bubbling after washing, and the entire process flow is cumbersome, which increases production costs.

[0004] The second method is to add "sandwich" materials to the inner layer of the shaft for dyeing during the warping of the original yarn. Although this method improves the dyeing effect to a certain extent, the added "sandwich" materials are disposable, expensive, and require high operation. If the operation is improper, it is easy to cause uneven dyeing at both ends of the dyeing shaft. In addition, since the yarn has not been set, it has greater elasticity, which can easily affect the shrinkage and elastic stability of the finished fabric. Therefore, a high-temperature dry setting process is still required in the post-finishing process to improve these problems, but high-temperature setting will have a certain impact on the color of the fabric, limiting the application range of the fabric.

[0005] Therefore, a new method for preparing four-way stretch fabrics is urgently needed to simplify the process, reduce costs, improve production efficiency and improve fabric performance. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a method for preparing a cotton-spandex core-spun color-woven four-way stretch fabric, which does not require the addition of "sandwich" materials and does not require high-temperature shaping in the post-finishing processing stage. It not only significantly shortens the process flow, simplifies the operating steps, improves production efficiency, and saves production costs, but also effectively improves the warp blistering problem caused by colored yarn warping and the degree of fabric color change. It is green, environmentally friendly, simple and easy to operate.

[0007] The technical solution adopted by the present invention is as follows: The preparation method of the cotton-spandex core-spun yarn-dyed four-way stretch fabric comprises the following steps: raw yarn winding - yarn steaming - warping - dyeing - yarn sizing - weaving - finishing; The raw yarn is made of cotton spandex core-spun yarn, and the spandex content in the fabric is 8-10%; In the original yarn winding process, the weight of the yarn is 0.3~0.5kg, and the density of the yarn is 0.40~0.45g / m 3 ; In the yarn steaming process, the yarn steaming temperature is 125-135°C and the time is 20-35 minutes; The post-finishing process includes the following steps: singeing - loose desizing - mercerizing - stentering - pre-shrinking.

[0008] The speed of the warping process is 350-400 m / min, and the yarn density of the shaft is 0.46-0.48 g / m 3 .

[0009] The dyeing process comprises the following steps: pre-treating at 100-105° C. for 30-40 minutes, whitening at 100-110° C. for 50-60 minutes or dyeing at 60-90° C. for 40-60 minutes.

[0010] In the sizing process, the sizing rate is 8-10% according to different yarn counts.

[0011] The weaving process adopts an air jet loom for weaving, and the weaving tension is 2400~2800N.

[0012] In the singeing process, the vehicle speed is 90-110 m / min, the burner position is 2-3#, and the flame intensity is 12-14 mbar.

[0013] In the loose desizing process, the vehicle speed is 80-90 m / min, the temperature of the steamer is 95-98° C., and the temperature of the water washing is 85-90° C.

[0014] In the mercerizing process, the alkali concentration is 18 to 25 degrees Baume.

[0015] In the tentering process, the vehicle speed is 50-60 m / min, and the temperature of the drying room is 100-120°C.

[0016] In the pre-shrinking process, the machine speed is 40-50 m / min, the temperature of the rubber blanket is 100-110°C, and the temperature of the wool blanket is 110-120°C.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) Compared with the elastic yarn transfer dyeing method, the method for preparing the cotton-spandex core-spun yarn-dyed four-way stretch fabric of the present invention significantly shortens the process flow, simplifies the operation steps, and improves the production efficiency. At the same time, the method also effectively improves the warp bubbling problem caused by the warping of the colored yarn; (2) Compared with the process of adding "sandwich" material to dye the shaft, the preparation method of the cotton-spandex core-spun yarn-dyed four-way stretch fabric of the present invention does not need to add "sandwich" material, thereby reducing the process flow, saving costs, and simplifying the operation; (3) The method for preparing the cotton-spandex core-spun yarn-dyed four-way stretch fabric of the present invention does not require high-temperature shaping in the post-finishing processing stage, which not only further simplifies the process flow, but also reduces the degree of color change of the fabric, is green and environmentally friendly, and is easy to operate. DETAILED DESCRIPTION

[0018] The present invention is further described below with reference to the embodiments, but they do not limit the implementation of the present invention.

[0019] The raw materials used in the examples and comparative examples are conventional commercially available raw materials unless otherwise specified, and the process methods used in the examples and comparative examples are conventional methods in the art unless otherwise specified.

[0020] Example 1 The specifications of the cotton-spandex core-spun yarn-dyed four-way stretch fabric are SPANDEX50 (40D) × SPANDEX50 (40D) × 114 × 90 × 53, the structure is high denim 8 / 6, and the fabric is pure white; The raw yarn is made of cotton spandex core-spun yarn, and the spandex content of the fabric is 9%. The preparation method thereof has the following steps: (1) Original yarn winding: The weight of the yarn is 0.3kg and the density of the yarn is 0.45g / m 3 ; (2) Yarn steaming: the temperature of the yarn steaming is 125°C and the time is 35 minutes; (3) Warping: The machine speed is 350 m / min, and the yarn density of the shaft is 0.46 g / m 3 ; (4) Dyeing: pre-treatment at 105°C for 30 min, whitening at 110°C for 60 min; (5) Sizing: sizing rate is 9%; (6) Weaving: Weaving is done using an air jet loom with a weaving tension of 2400N; (7) Singeing: the machine speed is 90 m / min, the burner position is 2#, and the flame intensity is 14 mbar; (8) Loose desizing: the machine speed is 85 m / min, the steamer temperature is 98 °C, and the washing temperature is 90 °C; (9) Mercerization: alkali concentration is 18 degrees Baume; (10) Tentering: the speed is 50 m / min, and the temperature of the drying room is 100 °C; (11) Preshrinkage: Machine speed is 50 m / min, rubber blanket temperature is 105°C, and wool blanket temperature is 115°C.

[0021] Example 2 The specifications of the cotton-spandex core-spun yarn-dyed four-way stretch fabric are BCI SPANDEX40 (40D) × BCISPANDEX40 (40D) × 140 × 74 × 53, the organization is 1 / 1, and the fabric is blue; The raw yarn is made of cotton spandex core-spun yarn, and the spandex content of the fabric is 8%. The preparation method thereof has the following steps: (1) Original yarn winding: The weight of the yarn is 0.5kg and the density of the yarn is 0.40g / m 3 ; (2) Yarn steaming: the temperature of the yarn steaming is 135°C and the time is 20 min; (3) Warping: The machine speed is 400 m / min, and the yarn density of the shaft is 0.48 g / m 3 ; (4) Dyeing: pre-treatment at 100°C for 40 min, dyeing at 60°C for 40 min; (5) Sizing: sizing rate is 8%; (6) Weaving: Air jet loom is used for weaving, and the weaving tension is 2800N; (7) Singeing: the machine speed is 100 m / min, the burner position is 2#, and the flame intensity is 12 mbar; (8) Loose desizing: the machine speed is 80 m / min, the steamer temperature is 95 °C, and the washing temperature is 85 °C; (9) Mercerization: alkali concentration is 25 degrees Baume; (10) Tentering: the speed is 60 m / min, and the temperature of the drying room is 110 °C; (11) Preshrinkage: Machine speed is 40 m / min, rubber blanket temperature is 100°C, and wool blanket temperature is 110°C.

[0022] Example 3 The specifications of the cotton-spandex core-spun yarn-dyed four-way stretch fabric are SPANDEX50 (40D) × SPANDEX50 (40D) × 150 × 86 × 55, the weave is 2 / 2, and the fabric is navy blue; The raw yarn is made of cotton spandex core-spun yarn, and the spandex content in the fabric is 10%. The preparation method thereof has the following steps: (1) Original yarn winding: The weight of the yarn is 0.4kg and the density of the yarn is 0.43g / m3 ; (2) Yarn steaming: the temperature of the yarn steaming is 130°C and the time is 30 min; (3) Warping: The machine speed is 380 m / min, and the yarn density of the shaft is 0.47 g / m 3 ; (4) Dyeing: pre-treatment at 100°C for 35 min and dyeing at 90°C for 60 min; (5) Sizing: sizing rate is 9%; (6) Weaving: Weaving is done using an air jet loom with a weaving tension of 2600N; (7) Singeing: speed is 110 m / min, burner position is 3#, flame intensity is 10 mbar; (8) Loose desizing: the machine speed is 80 m / min, the steamer temperature is 97 °C, and the washing temperature is 90 °C; (9) Mercerization: alkali concentration is 21 degrees Baume; (10) Tentering: the speed is 55 m / min, and the temperature of the drying room is 120 °C; (11) Preshrinkage: Machine speed is 45 m / min, rubber blanket temperature is 110°C, and wool blanket temperature is 120°C.

[0023] Example 4 The specifications of the cotton-spandex core-spun yarn-dyed four-way stretch fabric are SIRO SPANDEX120 / 2 (30D)×CPT60+SIRO SPANDEX120 / 2 (30D)×155×110×53, the structure is DB12, and the fabric is brown; The raw yarn is made of cotton spandex core-spun yarn, and the spandex content in the fabric is 8%. The preparation method thereof has the following steps: (1) Original yarn winding: The weight of the yarn is 0.4kg and the density of the yarn is 0.42g / m 3 ; (2) Yarn steaming: the temperature of the yarn steaming is 135°C and the time is 25 min; (3) Warping: The machine speed is 360 m / min, and the yarn density of the shaft is 0.47 g / m 3 ; (4) Dyeing: pre-treatment at 100°C for 35 min and dyeing at 60°C for 50 min; (5) Sizing: sizing rate is 10%; (6) Weaving: Weaving is done using an air jet loom with a weaving tension of 2700N; (7) Singeing: vehicle speed is 105 m / min, burner position is 2#, flame intensity is 12 mbar; (8) Loose desizing: the machine speed is 80 m / min, the steamer temperature is 96 °C, and the washing temperature is 90 °C; (9) Mercerization: alkali concentration is 23 degrees Baume; (10) Tentering: the speed is 60 m / min, and the temperature of the drying room is 110 °C; (11) Preshrinkage: Machine speed is 40 m / min, rubber blanket temperature is 100°C, and wool blanket temperature is 110°C.

[0024] Comparative Example 1 The difference from Example 1 is that the fabric preparation method has the following steps: warping - dyeing - sizing - weaving - singeing - loose desizing - dry setting - Mercerizing-Tentering-Pre-shrinking. Among them: In the warping process, a "sandwich" material needs to be added to dye the beam; the sandwich (weight 540g / cm 2 , width 1665mm) was purchased from Shandong Zhenqiao Warp Knitting Co., Ltd.; in the dry setting process: the speed is 20m / min, the drying room temperature is 195℃; The rest is the same as in Example 1.

[0025] Comparative Example 2 The difference from Example 2 is that in the original yarn winding process, the weight of the yarn is 1 kg, and the rest is the same as Example 2.

[0026] Comparative Example 3 The difference from Example 2 is that in the original yarn winding process, the density of the yarn is 0.5 g / m 3 , the rest is the same as Example 2.

[0027] Comparative Example 4 The difference from Example 2 is that in the original yarn winding process, the density of the yarn is 0.35 g / m 3 , the rest is the same as Example 2.

[0028] Comparative Example 5 The difference from Example 1 is that in the yarn steaming process, the yarn steaming temperature is 110° C., and the rest is the same as Example 1.

[0029] Comparative Example 6 The difference from Example 4 is that in the yarn steaming process, the yarn steaming time is 45 minutes, and the rest is the same as Example 4.

[0030] The fabrics prepared in Examples 1 to 4 and Comparative Examples 1 to 6 were tested for performance, and the testing methods were as follows: Appearance after washing: Tested according to AATCC 124-2011; Warp shrinkage (%): Tested in accordance with AATCC 135-2014; Warp elasticity (%): tested according to ASTM D3107-07 (2015); Color rating: Tested in accordance with AATCC EP1-2020; The test results are shown in Table 1.

[0031] Table 1 Performance test results

[0032] It can be seen from the test data in Table 1 that each test item in the fabric performance test prepared in Examples 1 to 4 meets the qualified standards.

[0033] In Comparative Example 1, due to the use of a post-finishing and shaping process, there is little difference in the finished product test data, but the impact on the color is relatively large. The post-finishing fabric is severely yellowed due to high-temperature shaping. In order to ensure the color, a washing process is required, which further increases the process and cost.

[0034] In Comparative Example 2, since the weight of the original yarn is adjusted to 1 kg, as the weight increases, the difference in the elasticity of the yarn inside and outside increases during steaming, which affects the appearance of the fabric after washing, and bubbles will form after washing.

[0035] In Comparative Example 3, the yarn density of the original yarn was adjusted to 0.5 g / m 3 When the density increases, the shrinkage space of the yarn becomes smaller during steaming, which makes the elasticity of the yarn smaller, and then the elasticity of the resulting fabric also becomes smaller.

[0036] In Comparative Example 4, the yarn density of the original yarn was adjusted to 0.35 g / m 3 After the density decreases, the shrinkage space of the yarn becomes larger during yarn steaming, which makes the yarn more elastic, affecting the shrinkage and elasticity of the finished product, thereby affecting the elasticity and shrinkage rate of the fabric.

[0037] In Comparative Example 5, the yarn steaming temperature of the original yarn is reduced to 110° C., which has a poor setting effect on the yarn, causing the elasticity of the yarn to increase, thereby affecting the elasticity and shrinkage of the fabric.

[0038] In Comparative Example 6, the steaming temperature of the original yarn was extended to 45 minutes, and the yarn setting time was too long, which reduced the elasticity of the yarn and affected the elasticity of the fabric, resulting in a smaller elasticity.

Claims

1. A method for preparing a cotton-spandex core-spun yarn-dyed four-way stretch fabric, characterized in that: It includes the following processes: raw yarn winding - yarn steaming - warping - dyeing - sizing - weaving - finishing; The raw yarn is made of cotton spandex core-spun yarn, and the spandex content in the fabric is 8-10%; in the raw yarn winding process, the weight of the yarn is 0.3-0.5 kg, and the density of the yarn is 0.40-0.45 g / m 3 ; In the yarn steaming process, the yarn steaming temperature is 125-135°C and the time is 20-35 minutes; The post-finishing process includes the following steps: singeing - loose desizing - mercerizing - stentering - pre-shrinking.

2. The method for preparing the cotton-spandex core-spun yarn-dyed four-way stretch fabric according to claim 1, characterized in that: The speed of the warping process is 350-400 m / min, and the yarn density of the shaft is 0.46-0.48 g / m 3 .

3. The method for preparing the cotton-spandex core-spun yarn-dyed four-way stretch fabric according to claim 1, characterized in that: The dyeing process comprises the following steps: pre-treating at 100-105° C. for 30-40 minutes, whitening at 100-110° C. for 50-60 minutes or dyeing at 60-90° C. for 40-60 minutes.

4. The method for preparing the cotton-spandex core-spun yarn-dyed four-way stretch fabric according to claim 1, characterized in that: In the sizing process, the sizing rate is 8-10%.

5. The method for preparing the cotton-spandex core-spun yarn-dyed four-way stretch fabric according to claim 1, characterized in that: The weaving process adopts an air jet loom for weaving, and the weaving tension is 2400~2800N.

6. The method for preparing the cotton-spandex core-spun yarn-dyed four-way stretch fabric according to claim 1, characterized in that: In the singeing process, the vehicle speed is 90-110 m / min, the burner position is 2-3#, and the flame intensity is 12-14 mbar.

7. The method for preparing the cotton-spandex core-spun yarn-dyed four-way stretch fabric according to claim 1, characterized in that: In the loose desizing process, the vehicle speed is 80-90 m / min, the temperature of the steamer is 95-98° C., and the temperature of the water washing is 85-90° C.

8. The method for preparing the cotton-spandex core-spun yarn-dyed four-way stretch fabric according to claim 1, characterized in that: In the mercerizing process, the alkali concentration is 18 to 25 degrees Baume.

9. The method for preparing the cotton-spandex core-spun yarn-dyed four-way stretch fabric according to claim 1, characterized in that: In the tentering process, the vehicle speed is 50-60 m / min, and the temperature of the drying room is 100-120°C.

10. The method for preparing the cotton-spandex core-spun yarn-dyed four-way stretch fabric according to claim 1, characterized in that: In the pre-shrinking process, the machine speed is 40-50 m / min, the temperature of the rubber blanket is 100-110°C, and the temperature of the wool blanket is 110-120°C.

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