Polyolefin skin-friendly loose and lustrous cotton natural anti-uv fabric and preparation method thereof

Abstract

This invention relates to the field of fabric technology, disclosing a skin-friendly, elastic, lustrous polyolefin cotton natural UV-resistant fabric and its preparation method. The preparation method includes a knitting process and a finishing process. In the knitting process, the raw materials are combed long-staple cotton and polyolefin elastic fibers, and the woven structure is a cotton-jersey fabric structure formed by the uniform distribution of combed long-staple cotton and polyolefin elastic fibers. The finishing process includes opening, pre-setting, alkali shrinking, enzyme washing, dyeing, dehydration, drying, setting, steaming, and pre-shrinking. The resulting fabric has a weight of 200-300 g / m². 2 The weight deviation is within + / -3%, the dimensional change after washing is controlled within -5%, and the fabric's UV protection value is 50 UPF. It combines high elasticity and UV protection.

Description

Technical Field

[0001] This invention relates to the field of fabric technology, specifically to a polyolefin skin-friendly, elastic, lustrous cotton natural UV-resistant fabric and its preparation method. Background Technology

[0002] Currently, most fabrics on the market improve their UPF (ultraviolet protection factor) through tight weaving or the addition of UPF additives. However, both of these methods have the following drawbacks: 1. Due to the tight weave and the use of high-UPF materials such as polyester and nylon, the fabrics are often stuffy and not breathable. For example, sun-protective clothing, although thin, becomes noticeably uncomfortable when sweating, resulting in a damp and stuffy feeling, making it uncomfortably difficult to wear. 2. The addition of UPF additives cannot guarantee that the fabric will provide long-term UV protection. With prolonged use, or under stretching or damp conditions, the protective performance provided by the fabric may decrease.

[0003] Therefore, in order to solve the defects of existing UV protection fabrics, this invention aims to propose a new UV protection fabric that takes into account both elasticity and UV protection. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a polyolefin-based, skin-friendly, elastic, glossy, natural UV-resistant fabric and its preparation method. This fabric combines high elasticity with UV resistance.

[0005] The technical solution of this invention is as follows: A method for preparing a polyolefin skin-friendly, elastic, glossy, natural UV-resistant cotton fabric includes a knitting process and a finishing process. The raw materials in the knitting process are combed long-staple cotton and polyolefin elastic fibers, and the woven structure is a cotton jersey structure formed by the uniform distribution of combed long-staple cotton and polyolefin elastic fibers. The finishing processes include opening process, pre-forming process, alkali shrinking process, enzyme washing process, dyeing process, dehydration process, drying process, setting process, steaming process, and pre-shrinking process; The process includes: alkaline shrinkage, which involves using caustic soda of a specific concentration for alkaline shrinkage treatment in the dyeing vat; enzyme washing, which involves removing hair using cellulase; dyeing, which involves dyeing with reactive dyes; setting, which involves finishing with ice-feeling silicone soft oil; and steaming, which involves treating with high-temperature steam and high-pressure rollers.

[0006] In the above scheme, polyolefin elastic fiber (XLA) is a high-performance elastic fiber material with excellent elasticity and resilience. Its elongation can reach more than 500%, its density is low, making it lighter than traditional elastic fibers. It can be low-temperature set at 120℃, has soft elasticity, and its initial modulus is higher than that of spandex, making it more natural and comfortable to wear. It also has natural UV protection. By combining long-staple cotton and XLA elastic fiber to weave into fabric, and then using the same combination of processes such as alkali shrinkage, depilation, ice-feel silicone oil, steaming, and pre-shrinking, the resulting fabric has a silky luster, smooth hand feel, loose and skin-friendly elasticity, cotton-like comfort, and combines high elasticity and UV protection.

[0007] In one possible implementation, the knitting process employs a double-sided weft knitting machine with a gauge of 24-32 needles / inch, and the knitting method for the cotton jersey structure is as follows: Needle arrangement: Needle set: Needle 1 (high heel needle), Needle 2 (low heel needle) Syringe: 2 low-heel needles, 1 high-heel needle First row: Upper needle coil 1 forms a circle, upper needle coil 2 moves the floating thread, lower needle cylinder 1 forms a circle, lower needle cylinder 2 moves the floating thread, and the fed yarn is combed long-staple cotton and polyolefin elastic fiber; among which the polyolefin elastic fiber is used for both upper and lower needles. Second route: 2 upper needles form a circle, 1 upper needle forms a floating thread, 2 lower needles form a circle, 1 lower needle forms a floating thread, and the fed yarn is combed long-staple cotton and polyolefin elastic fiber; the polyolefin elastic fiber is fed into the upper and lower needles.

[0008] In one possible implementation, the combed long-staple cotton yarn has a count of 30-60 English count, and the polyolefin elastic fiber yarn has a count of 30D-50D.

[0009] In one possible implementation, the first and second combed long-staple cotton yarns are 12-16cm / 50 loops long; the first and second polyolefin elastic fiber yarns are 4-8cm / 50 loops long, and the yarn ratio of combed long-staple cotton to polyolefin elastic fiber is 85.2:14.8.

[0010] In one possible implementation, the pre-forming process is as follows: pre-forming is performed on a pre-forming machine at a temperature of 185°C for 3 minutes, with 1 round of pre-forming, a vehicle speed of 24 meters per minute, and an air volume of 65%. And / or, the treatment agent in the alkaline shrinkage process includes 3 g / L of degreasing agent, 6 g / L of caustic soda, 0.25 g / L of penetrant SKS, 1.5 g / L of dispersant, and 3 g / L of H2O2 (27.5%), with water as the solvent, a bath ratio of fabric to treatment agent of 1:6, a treatment temperature of 80°C, and a treatment time of 60 min; And / or, the washing solution used in the enzyme washing process includes 1.5-2.5 g / L of neutral enzyme, 1-1.5 g / L of sodium acetate, and 0.1-0.2 g / L of acetic acid, with water as the solvent, a pH value of 4.5-6, a bath ratio of fabric to washing solution of 1:(10-15), and a treatment time of 45-60 min; And / or, the dyeing process is as follows: dyeing → soaping → color fixing treatment, wherein the dye formula for dyeing is 65g / L sodium sulfate and 20g / L soda ash, the solvent is water, the dyeing treatment temperature is 45-60℃, the treatment time is 30-60min, and the bath ratio of fabric to dye is 1:6; the detergent formula for soaping is 2g / L soaping agent, the solvent is water, the soaping temperature is 90℃, and the time is 20min; And / or, the treatment agents used in the shaping process include softener D6100 80-200g / L, penetrant 1-2g / L, solvent is water, treatment temperature is 130-160℃, machine speed is 18-25m / min, overfeed is 45%, and effective air volume of the drying oven is 60%; And / or, the processing temperature in the steaming process is 100℃, the processing pressure is 0.12MPa, and the machine speed is 20m / min.

[0011] In one possible implementation, the dispersant used in the alkali condensation process is naphthalenesulfonic acid formic acid condensate NNO.

[0012] In one possible implementation, the neutral enzyme used in the enzyme washing process is L33 enzyme water.

[0013] In one possible implementation, the soaping agent used in the dyeing process is WX-MA soaping agent.

[0014] In one possible implementation, the penetrant used in the shaping process is Derma-DM-1361.

[0015] The present invention also provides a polyolefin skin-friendly, elastic, glossy cotton natural anti-UV fabric, which is prepared by the above-described preparation method.

[0016] In one possible implementation, the polyolefin-based, skin-friendly, elastic, lustrous, natural UV-resistant cotton fabric has a weight of 200-300 g / m². 2 The weight deviation is within + / -3%, the dimensional change after washing is controlled within -5%, and the fabric UV protection value is 50UPF.

[0017] The beneficial effects of this invention are as follows: 1. This invention utilizes the natural UV resistance of XLA elastic fiber and combines it with combed long-staple cotton. The fabric is woven using a cotton-wool weave method, giving it natural elasticity and a smooth structure. The alkali shrinkage process increases the fabric's luster, the de-pilling process removes yarn lint, and the ice-feel silicone oil finishing increases the smoothness and softness of the fabric surface. The steaming and pre-shrinking processes further enhance the fabric's smoothness and luster.

[0018] 2. Through the above technologies, a silky luster, smooth hand feel, naturally loose and skin-friendly elasticity, and cotton-like comfort fabric are produced.

[0019] 3. The above-mentioned fabrics are suitable for casual sportswear and business casual T-shirts. Attached Figure Description

[0020] Figure 1 The above diagrams are the machine-mounted triangular diagrams for Examples 1 and 2. Figure 2 These are the weaving structure diagrams for Examples 1 and 2; Figure 3 These are weaving effect diagrams for Examples 1 and 2. Detailed Implementation

[0021] To illustrate the technical solution described in this invention, specific embodiments are described below.

[0022] Example 1, see Figures 1-3 The fabric raw materials of the present invention include combed long-staple cotton and polyolefin elastic fiber (XLA) interwoven, and the weaving is carried out by a double-sided circular knitting machine. The structure is a cotton jersey structure, which is woven from two kinds of yarns, including yarn 1 being combed long-staple cotton yarn and yarn 2 being polyolefin elastic fiber (XLA) woven together. During the knitting process, the fabric is knitted using a 28-gauge / 34-inch double-sided weft knitting machine. The weaving method is as follows: Needle arrangement: Upper needle plate: High heel needle (needle 1), Low heel needle (needle 2) Insert the syringe: Low heel needle (needle 2), high heel needle (needle 1). First row: Upper needle 1 forms a circle, upper needle 2 moves the floating thread, lower needle cylinder 1 forms a circle, lower needle cylinder 2 moves the floating thread, and the fed yarn is combed long-staple cotton yarn and polyolefin elastic fiber (XLA); among which, the polyolefin elastic fiber (XLA) takes the upper and lower needles.

[0023] Second route: 2 upper needles form a circle, 1 upper needle runs on a floating thread, 2 lower needles form a circle, 1 lower needle runs on a floating thread, and the fed yarn is combed long-staple cotton yarn and polyolefin elastic fiber (XLA); among which, the polyolefin elastic fiber (XLA) takes the upper and lower needles.

[0024] The combed long-staple cotton yarn has a count of 50 English count, and the polyolefin elastic fiber (XLA) yarn has a count of 42D. The materials have natural UV protection and can reach UPF 50+.

[0025] The first and second passes are combed long-staple cotton yarns with a yarn length of 12.5cm / 50 loops; The first and second lines are made of polyolefin elastic fiber (XLA) with a yarn length of 5.5cm / 50 loops, and the yarn ratio of combed long-staple cotton to polyolefin elastic fiber is 85.2:14.8.

[0026] The woven fabric then undergoes a finishing process that includes the following steps: Opening - pre-shaping - alkali shrinkage - enzyme washing - dyeing - dehydration - loose drying - setting (with ice-sensitive silicone oil) - steaming - pre-shrinking.

[0027] The pre-set process is as follows: pre-set temperature × time = 185℃ × 24m / min, and the effective air volume of the oven is 65%. The alkali condensation process is as follows: Degreasing agent NX-65, high-efficiency refining degreasing agent, Wende 3g / L. Caustic soda 6g / L, Penetrant SKS 0.25g / L, Dispersant: Naphthalenesulfonic acid formic acid condensate NNO 1.5 g / L H2O2 (27.5%) 3g / L, solvent is water; Temperature × Time: 80℃ × 60min Bath ratio: 1:6.

[0028] The specific process conditions for bio-enzyme treatment are as follows: The pH value is 6. Neutral enzyme L333, enzyme water 2.5g / L, Sodium acetate 1g / L, Acetic acid 0.1 g / L, solvent is water; Temperature 55℃ Processing time: 60 minutes Bath ratio 1:10.

[0029] The dyeing process is as follows: dyeing → soaping → color fixing treatment. In the staining step: The dyes and dosages are matched according to the required color combinations as follows: 65g / L of sodium sulfate Soda ash 20g / L, solvent is water; Temperature: 45℃ Time: 45 minutes Bath ratio: 1:6.

[0030] Soap washing formula: Soap detergent WX-MA, Soap detergent Wende 2g / L, solvent is water; Temperature: 90℃ Time: 20 minutes.

[0031] The shaping process is as follows: Temperature: 130℃ Vehicle speed 25m / min Overfeed: 45%, The oven's effective airflow is 60%. Fabric softener D6100 200g / L Penetrant: DM-1361 (2g / L), solvent: water The steaming process is as follows: Temperature 100℃ Pressure 0.12 MPa Machine speed 20m / min.

[0032] The final fabric weight is 250 g / m². 2 The dimensional change after washing is controlled within -5%, and the fabric has a UV protection value of 50UPF.

[0033] The finished fabric obtained in Example 1 was subjected to routine physicochemical tests, and the results are as follows: Color fastness of textiles to sunlight GB / T 8427 ≥4.0 level 4.5 Color fastness to perspiration in textiles GB / T 3922 ≥4.0 level (color change) ≥3.0 level (staining) 4 Water fastness of textiles GB / T 5713 ≥3-4.0 level (color change) ≥3-4.0 level (staining) 4 Color fastness to rubbing of textiles GB / T 3920 4.0 grade (dry grinding) ≥ 3.0 grade (wet grinding, dark color 2.0) Level 4 (dry grinding) Level 3 (wet grinding) Color fastness to washing of textiles GB / T 3921 A1 ≥4.0 level 4-5 Dimensional stability GB / T 8629-5A Vertical: + / -5% Lateral: + / -5% Vertical: -3.6% Horizontal: -2.5% pilling GB / T4802.1 4.0 4.0 Breaking through the powerful GB / T 19976 ≥250N 336N Formaldehyde content GB / T 2912.1 ≤75PPM 26PPM pH value of textiles GB / T 7573 4.5-6.5 6.4 UV test ASTM G155 UPF>50+ 62

[0034] Example 2: The raw materials of the fabric of the present invention include combed long-staple cotton and polyolefin elastic fiber (XLA) interwoven together. The weaving is carried out by a double-sided circular knitting machine. The structure is a cotton jersey structure, which is woven from two kinds of yarns, including yarn 1 being combed long-staple cotton yarn and yarn 2 being polyolefin elastic fiber (XLA) woven together. During the knitting process, the fabric is knitted using a 28-gauge / 34-inch double-sided weft knitting machine, and the knitting method is as follows: Needle arrangement: Upper needle plate: High heel needle (needle 1), Low heel needle (needle 2) Insert the syringe: Low heel needle (needle 2), high heel needle (needle 1). First row: Upper needle 1 forms a circle, upper needle 2 moves the floating thread, lower needle cylinder 1 forms a circle, lower needle cylinder 2 moves the floating thread, and the fed yarn is combed long-staple cotton yarn and polyolefin elastic fiber (XLA); among which, the polyolefin elastic fiber (XLA) takes the upper and lower needles.

[0035] Second route: 2 upper needles form a circle, 1 upper needle runs on a floating thread, 2 lower needles form a circle, 1 lower needle runs on a floating thread, and the fed yarn is combed long-staple cotton yarn and polyolefin elastic fiber (XLA); among which, the polyolefin elastic fiber (XLA) takes the upper and lower needles.

[0036] The combed long-staple cotton yarn has a count of 40 English count, and the polyolefin elastic fiber (XLA) yarn has a count of 30D. The material has natural UV protection and can reach UPF 50+.

[0037] The first and second passes are combed long-staple cotton yarns with a yarn length of 13.5cm / 50 loops; The first and second lines of polyolefin elastic fiber (XLA) have a yarn length of 5cm / 50 loops, and the yarn ratio of combed long-staple cotton to polyolefin elastic fiber is 85.2:14.8; The woven fabric undergoes a finishing process that includes the following production steps: Opening - Pre-shaping - Alkali shrinkage - Enzyme washing - Dyeing - Dehydration - Loose drying - Shaping (with ice-sensitive silicone oil) - Steaming - Pre-shrinkage; The pre-designed process is as follows: Preset temperature × time: 190℃ × 22m / min, effective air volume of the oven 65%.

[0038] The alkali condensation process is as follows: Degreasing agent NX-65, high-efficiency refining degreasing agent, Wende 2g / L. Caustic soda 8g / L, Penetrant SKS 0.5g / L, Dispersant: Naphthalenesulfonic acid formic acid condensate NNO 2 g / L H2O2 (27.5%), 4 g / L, solvent: water. Temperature × Time: 80℃ × 60min Bath ratio: 1:6.

[0039] The enzyme washing process conditions are as follows: The pH value is 6. Neutral enzyme L333, enzyme water 2.5g / L, Sodium acetate 1g / L, Acetic acid 0.1 g / L Temperature 55℃ Processing time: 60 minutes; Bath ratio 1:10.

[0040] The dyeing process flow is as follows: dyeing → soaping → color fixing treatment, as detailed below: Reactive dyeing process for cotton: Cotton dyeing formula: Dyes and dosage are matched according to the required color. 70g / L of sodium sulfate Soda ash 25g / L, solvent is water; Temperature: 45℃, Time: 60min Bath ratio: 1:6.

[0041] Soap formula: Soap detergent WX-MA, Soap detergent Wende 2.5g / L.

[0042] Temperature: 90℃, time: 25min.

[0043] The shaping process is as follows: Temperature: 130℃ Vehicle speed: 20m / min Overfeed: 40%, The oven's effective airflow is 65%. Fabric softener D6100 150g / L The penetrant was DM-1361 2g / L, and the solvent was water.

[0044] The steaming process is as follows: Temperature 100℃, pressure 0.12MPa Machine speed 20m / min.

[0045] The final fabric weight was 280 g / m². 2 The dimensional change after washing is controlled within -5%, and the fabric has a UV protection value of 50UPF.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for preparing a polyolefin-based, skin-friendly, elastic, lustrous, natural UV-resistant fabric, characterized in that, This includes the knitting process and the finishing process; The raw materials in the knitting process are combed long-staple cotton and polyolefin elastic fibers, and the woven structure is a cotton jersey structure formed by the uniform distribution of combed long-staple cotton and polyolefin elastic fibers. The finishing processes include opening process, pre-forming process, alkali shrinking process, enzyme washing process, dyeing process, dehydration process, drying process, setting process, steaming process, and pre-shrinking process; The process includes: alkaline shrinkage, which involves using caustic soda of a specific concentration for alkaline shrinkage treatment in the dyeing vat; enzyme washing, which involves removing hair using cellulase; dyeing, which involves dyeing with reactive dyes; setting, which involves finishing with ice-feeling silicone soft oil; and steaming, which involves treating with high-temperature steam and high-pressure rollers.

2. The preparation method according to claim 1, characterized in that, The knitting process uses a double-sided weft knitting machine with a gauge of 24-32 needles / inch. The knitting method for the cotton jersey structure is as follows: Needle arrangement: Needle set: Needle 1 (high heel needle), Needle 2 (low heel needle) Syringe: 2 low-heel needles, 1 high-heel needle First row: Upper needle coil 1 forms a circle, upper needle coil 2 moves the floating thread, lower needle cylinder 1 forms a circle, lower needle cylinder 2 moves the floating thread, and the fed yarn is combed long-staple cotton and polyolefin elastic fiber; among which the polyolefin elastic fiber is used for both upper and lower needles. Second route: 2 upper needles form a circle, 1 upper needle forms a floating thread, 2 lower needles form a circle, 1 lower needle forms a floating thread, and the fed yarn is combed long-staple cotton and polyolefin elastic fiber; the polyolefin elastic fiber is fed into the upper and lower needles.

3. The preparation method according to claim 2, characterized in that, The combed long-staple cotton yarn has a count of 30-60 English count, and the polyolefin elastic fiber yarn has a count of 30D-50D.

4. The preparation method according to claim 2 or 3, characterized in that, The first and second combed long-staple cotton yarns are 12-16cm / 50 loops long; the first and second polyolefin elastic fiber yarns are 4-8cm / 50 loops long, and the yarn ratio of combed long-staple cotton to polyolefin elastic fiber is 85.2:14.

8.

5. The preparation method according to claim 1, characterized in that, The pre-forming process is as follows: pre-forming is performed on a pre-forming machine at a temperature of 185°C for 3 minutes, once every 1 minute, with a speed of 24 meters per minute and an air volume of 65%. And / or, the treatment agent in the alkaline shrinkage process includes 3 g / L of degreasing agent, 6 g / L of caustic soda, 0.25 g / L of penetrant SKS, 1.5 g / L of dispersant, and 3 g / L of H2O2 (27.5%), with water as the solvent, a bath ratio of fabric to treatment agent of 1:6, a treatment temperature of 80°C, and a treatment time of 60 min; And / or, the washing solution used in the enzyme washing process includes 1.5-2.5 g / L of neutral enzyme, 1-1.5 g / L of sodium acetate, and 0.1-0.2 g / L of acetic acid, with water as the solvent, a pH value of 4.5-6, a bath ratio of fabric to washing solution of 1:(10-15), and a treatment time of 45-60 min; And / or, the dyeing process is as follows: dyeing → soaping → color fixing treatment, wherein the dye formula for dyeing is 65g / L sodium sulfate and 20g / L soda ash, the solvent is water, the dyeing treatment temperature is 45-60℃, the treatment time is 30-60min, and the bath ratio of fabric to dye is 1:6; the detergent formula for soaping is 2g / L soaping agent, the solvent is water, the soaping temperature is 90℃, and the time is 20min; And / or, the treatment agents used in the shaping process include softener D6100 80-200g / L, penetrant 1-2g / L, solvent is water, treatment temperature is 130-160℃, machine speed is 18-25m / min, overfeed is 45%, and effective air volume of the drying oven is 60%; And / or, the processing temperature in the steaming process is 100℃, the processing pressure is 0.12MPa, and the machine speed is 20m / min.

6. The preparation method according to claim 5, characterized in that, The dispersant used in the alkaline shrinkage process is naphthalenesulfonic acid formic acid condensate NNO.

7. The preparation method according to claim 5, characterized in that, The neutral enzyme used in the enzyme washing process is L333 enzyme water.

8. The preparation method according to claim 5, characterized in that, The soaping agent used in the dyeing process is WX-MA soaping agent.

9. The preparation method according to claim 5, characterized in that, The penetrant used in the shaping process is Derma-DM-1361.

10. A polyolefin-based, skin-friendly, elastic, lustrous, natural UV-resistant cotton fabric, characterized in that... It is prepared by the preparation method according to any one of claims 1-9.

11. The polyolefin skin-friendly, elastic, lustrous, natural UV-resistant cotton fabric according to claim 10, characterized in that, The fabric has a weight of 200-300 g / m². 2 The weight deviation is within + / -3%, the dimensional change after washing is controlled within -5%, and the fabric UV protection value is 50UPF.

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