Preparation method of fluorine-free environment-friendly one-way moisture-conducting knitted fabric

Abstract

The present application relates to the technical field of functional fabric, and provides a preparation method of a fluorine-free environment-friendly one-way moisture-conducting knitted fabric, which comprises the following steps: step one, using a weft-knitting rib machine or a single-side circular knitting machine, taking profiled cross-section polyester filaments and pure cotton compact spun yarn as raw materials, and weaving according to a special organization structure of 12 modes in one cycle to form a double-layer structure of the fabric surface being polyester and the fabric bottom being cotton-polyester interwoven random star points; step two, performing conventional dyeing and dehydration treatment on the fabric, and not adding water-repellent additives in the dyeing process; and step three, performing post-finishing and setting by using a fluorine-free environment-friendly finishing liquid. The whole process is fluorine-free and environment-friendly, and the pollution and non-environmental protection problems are completely solved; the structure and finishing are synergistic, the moisture-conducting is efficient and persistent, and the washing resistance is greatly improved; no coating is used, the fabric is soft and skin-friendly, the comfort of cotton and the quick drying of polyester are considered, the process is simplified, the cost is lower, and the comprehensive performance and scale advantages are unexpected.

Description

Technical Field

[0001] This invention relates to the field of functional fabric technology, specifically to a method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric. Background Technology

[0002] With the rapid development of sportswear and functional textiles, consumer demand for moisture-wicking and quick-drying fabrics continues to rise. Meanwhile, tightening environmental policies have restricted the use of fluorinated waterproof / water-repellent finishing agents due to their high environmental accumulation and difficulty in degradation, making fluorine-free and environmentally friendly fabrics the core development direction for unidirectional moisture-wicking fabrics.

[0003] Existing unidirectional moisture-wicking knitted fabrics are mainly achieved through two methods: one is the printing / coating method, which involves partially coating the inner side of the fabric with a fluorine-based water-repellent coating to create a hydrophilic-water-repellent contrast; the other is the yarn modification method, which involves interweaving fluorine-treated water-repellent yarn with ordinary hydrophilic yarn; and the third is simply using the difference in moisture regain between cotton and polyester to create a double-layer structure, but without the addition of fluorine-free finishing.

[0004] Existing technologies generally rely on fluorine-based additives, which are environmentally unfriendly and can easily cause water pollution. Furthermore, the coating / printing process is complex, the fabric feels stiff, and has poor washability. After multiple washes, the unidirectional moisture-wicking function rapidly diminishes. Pure structural fabrics have low moisture-wicking efficiency, slow moisture absorption, and are prone to sticking to the body. They cannot simultaneously achieve high moisture-wicking performance, skin-friendly comfort, and environmental safety, making it difficult to meet the high standards required for high-end sports and home settings. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a method for preparing a fluorine-free, environmentally friendly, one-way moisture-wicking knitted fabric. This method solves the problems of existing one-way moisture-wicking fabrics, which generally rely on fluorine-based water-repellent agents and coating processes, resulting in poor environmental performance, pollution, poor washability, and rapid functional degradation after multiple washes; simple structural moisture-wicking fabrics are inefficient and cannot simultaneously achieve high moisture wicking, skin-friendly comfort, and environmental safety, while also suffering from complex processes, high costs, and a stiff hand feel, making it difficult to meet the needs of green textiles and high-end clothing.

[0006] To achieve the above objectives, the present invention provides a method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric through the following technical solution, comprising the following steps: Step 1: Using a weft knitting rib knitting machine or a single-sided circular knitting machine, polyester yarn with irregular cross-section and pure cotton tightly spun yarn are used as raw materials and woven according to a special structure of 12-mold one cycle to form a double-layer structure fabric with polyester on the surface and cotton and polyester on the back. Step 2: Perform conventional dyeing and dehydration treatment on the greige fabric. No water-repellent auxiliaries are added during the dyeing process. Step 3: Use a fluorine-free environmentally friendly finishing solution for post-finishing and shaping. The finishing solution contains hydrophilic soft silicone oil, moisture-wicking agent, non-ionic penetrant, pH adjuster and deionized water. No fluorine-based waterproofing agents are used throughout the process. Step 4: Hot air drying and shaping to obtain fluorine-free environmentally friendly unidirectional moisture-wicking knitted fabric.

[0007] Preferably, the irregular cross-section polyester filament in step one is a 48F / 96F irregular geometric cross-section polyester filament with a standard moisture regain of 0.4%, and the pure cotton compact spun yarn is a 50S / 1 combed cotton yarn with a standard moisture regain of 8.5%. The difference in moisture regain forms a differential capillary effect to achieve unidirectional moisture conduction.

[0008] Preferably, the 12-module cyclic tissue structure in step one is as follows: The first, third, fifth, seventh, ninth, and eleventh sections are made of polyester yarn woven in loops to form a moisture-wicking layer on the fabric surface; The 2nd, 4th, 6th, 8th, 10th, and 12th sections are woven with interlaced cotton yarn to form the moisture-absorbing base layer; The fabric backing features a cotton-polyester interspersed dotted pattern, with the cotton dots absorbing sweat and the polyester dots wicking it away.

[0009] Preferably, the weaving equipment in step one is a 28-needle 34-inch weft knitting rib knitting machine with a total of 2976 needles; the polyester yarn feeding length is 26-29cm / 100 needles, and the cotton yarn feeding length is 20-22cm / 100 needles.

[0010] Preferably, the fluorine-free environmentally friendly finishing liquid in step three comprises, by weight: 35-42 parts of hydrophilic soft silicone oil, 5-10 parts of moisture-wicking agent, 1.5-4 parts of nonionic penetrant, 0.05-0.1 parts of citric acid, and 1000 parts of deionized water.

[0011] Preferably, the hydrophilic soft silicone oil in step three is a modified polymer multi-component copolymer silicone oil emulsion, the moisture-wicking agent is a fluorine-free hydrophilic finishing agent, and the nonionic penetrant is a polyoxyethylene ether surfactant.

[0012] Preferably, the finishing and setting process parameters in step three are: temperature 120-150℃, machine speed 18-25m / min, setting time 30-60s, and fabric liquid retention rate 65%-75%.

[0013] A fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric, consisting of a face fabric and a back fabric. The face fabric is a polyester woven layer, and the back fabric is a cotton-polyester dotted interwoven layer. It is fluorine-free and has no coating.

[0014] Preferably, the fabric backing serves as the skin-contacting surface for rapid moisture absorption, while the fabric outer surface serves as the outer surface for rapid moisture wicking and evaporation.

[0015] Preferably, the fabric is woven from a blend of a face fabric and a back fabric.

[0016] This invention provides a method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric. It has the following beneficial effects: 1. This invention does not use any fluorine-based additives or water-repellent coatings. The entire process from raw materials to finishing is environmentally friendly and non-toxic, solving the fatal defects of traditional one-way moisture-wicking fabrics, such as fluorine pollution and environmental unfriendliness.

[0017] 2. This invention utilizes the differential capillary effect of cotton-polyester moisture regain and the dual reinforcement of fluorine-free hydrophilic finishing, achieving a unidirectional transfer index of up to 335. The moisture wicking speed is improved compared to ordinary cotton-polyester fabrics, keeping the skin-friendly surface dry at all times.

[0018] 3. This invention has no coating or hard film, and the fabric is soft, breathable, skin-friendly and non-irritating. At the same time, it overcomes the disadvantages of pure cotton being slow to dry and pure polyester not absorbing sweat, combining the comfort of cotton with the quick-drying properties of polyester.

[0019] 4. This invention does not require special printing / coating equipment, and follows the conventional knitting and finishing process. The formula is simple, highly stable, and reduces production costs. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all 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] This invention provides a fluorine-free, environmentally friendly, one-way moisture-wicking knitted fabric.

[0022] As one aspect of this invention application, this invention application provides a fluorine-free environmentally friendly unidirectional moisture-wicking knitted fabric, which is woven from polyester yarn with irregular cross-section and pure cotton tightly spun yarn through a 12-mold one-cycle structure, and is finished and shaped using a fluorine-free environmentally friendly finishing liquid; the fabric is divided into a fabric surface and a fabric backing, the fabric surface is a polyester yarn woven layer, and the fabric backing is a cotton-polyester staggered star-shaped interwoven layer, without the use of fluorine-based auxiliaries and water-repellent coatings throughout the entire process.

[0023] In another aspect of this invention, the preparation method of the above-mentioned fluorine-free environmentally friendly unidirectional moisture-wicking knitted fabric is as follows: including the following steps: Step 1: Use a 28-gauge 34-inch weft knitting rib knitting machine and knit according to a 12-gauge cycle structure; the 1st, 3rd, 5th, 7th, 9th and 11th rows are knitted with 100D / 48F polyester yarn with a yarn feed length of 26-29cm / 100 needles; the 2nd, 4th, 6th, 8th, 10th and 12th rows are knitted with 50S / 1 pure cotton compact spun yarn with a yarn feed length of 20-22cm / 100 needles, to obtain a double-layer structure fabric.

[0024] Step 2: Perform conventional dyeing on the greige fabric, ensuring it is not too soft in the dyeing vat. After dyeing, thoroughly dehydrate the fabric and set it aside for later use.

[0025] Step 3: Add 35-42 parts of hydrophilic soft silicone oil, 5-10 parts of moisture-wicking agent, 1.5-4 parts of nonionic penetrant, 0.05-0.1 parts of citric acid, and 1000 parts of deionized water by weight, and stir evenly; impregnate the fabric with the finishing solution, with a liquid retention rate of 65%-75%, and dry and set it with hot air at 120-150℃ at a speed of 18-25m / min to obtain a fluorine-free environmentally friendly unidirectional moisture-wicking knitted fabric.

[0026] To better illustrate the formulation and process implementation of the fluorine-free environmentally friendly unidirectional moisture-wicking knitted fabric of the present invention, the following examples are provided: Example 1 A method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric includes the following steps: Step 1: Use a 28-gauge 34-inch weft knitting rib knitting machine, 12 patterns per cycle; the polyester yarn is 100D / 48F irregular cross section, with a yarn feed length of 26cm / 100 gauges; the cotton yarn is 50S / 1 pure cotton compact spun, with a yarn feed length of 20cm / 100 gauges.

[0027] Step 2: Routine dyeing, ensuring the dye is not too soft in the vat and that the dye is fully dehydrated.

[0028] Step 3: Fluorine-free finishing Finishing solution formulation: 35 parts hydrophilic soft silicone oil, 5 parts moisture-wicking agent, 1.5 parts nonionic penetrant, 0.07 parts citric acid, 1000 parts deionized water; setting temperature 120℃, machine speed 18m / min, liquid retention rate 65%.

[0029] Example 2 A method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric includes the following steps: Step 1: Use a 28-gauge 34-inch weft knitting rib knitting machine, 12-gauge per cycle; the polyester yarn is 100D / 48F irregular cross section, with a yarn feed length of 27.5cm / 100 gauges; the cotton yarn is 50S / 1 pure cotton compact spun, with a yarn feed length of 21cm / 100 gauges.

[0030] Step 2: Routine dyeing, ensuring the dye is not too soft in the vat and that the dye is fully dehydrated.

[0031] Step 3: 38 parts hydrophilic soft silicone oil, 7.5 parts moisture-wicking agent, 2.5 parts nonionic penetrant, 0.07 parts citric acid, and 1000 parts deionized water; setting temperature 135℃, machine speed 22m / min, liquid carry-over rate 70%.

[0032] Example 3 A method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric includes the following steps: Step 1: Use a 28-gauge 34-inch weft knitting rib knitting machine, 12-gauge per cycle; the polyester yarn is 100D / 48F irregular cross section, with a yarn feed length of 29cm / 100 gauges; the cotton yarn is 50S / 1 pure cotton compact spun, with a yarn feed length of 22cm / 100 gauges.

[0033] Step 2: Routine dyeing, ensuring the dye is not too soft in the vat and that the dye is fully dehydrated.

[0034] Step 3: 42 parts hydrophilic soft silicone oil, 10 parts moisture-wicking agent, 4 parts nonionic penetrant, 0.07 parts citric acid, and 1000 parts deionized water; setting temperature 150℃, machine speed 25m / min, liquid carry-over rate 75%.

[0035] Performance test examples Three sets of fabrics from the examples and ordinary unidirectional moisture-wicking fabrics (comparative examples) were selected and tested according to GB / T21655.2-2019 standard. The results are as follows: The results show that the fluorine-free environmentally friendly unidirectional moisture-wicking knitted fabric of the present invention has fast moisture wicking speed, excellent unidirectional transfer performance, strong water resistance, and is more environmentally friendly as it is fluorine-free throughout the process. At the same time, it has a soft and skin-friendly feel and fully meets the high-performance use requirements of sportswear, outdoor clothing and homewear.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric, characterized in that, Includes the following steps: Step 1: Using a weft knitting rib knitting machine or a single-sided circular knitting machine, polyester yarn with irregular cross-section and pure cotton tightly spun yarn are used as raw materials and woven according to a special structure of 12-mold one cycle to form a double-layer structure fabric with polyester on the surface and cotton and polyester on the back. Step 2: Perform conventional dyeing and dehydration treatment on the greige fabric. No water-repellent auxiliaries are added during the dyeing process. Step 3: Use a fluorine-free environmentally friendly finishing solution for post-finishing and shaping. The finishing solution contains hydrophilic soft silicone oil, moisture-wicking agent, non-ionic penetrant, pH adjuster and deionized water. No fluorine-based waterproofing agents are used throughout the process. Step 4: Hot air drying and shaping to obtain fluorine-free environmentally friendly unidirectional moisture-wicking knitted fabric.

2. The method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric according to claim 1, characterized in that, The irregularly shaped polyester filament in step one is a 48F / 96F irregularly shaped geometric cross-section polyester filament with a standard moisture regain of 0.4%. The pure cotton compact spun yarn is a 50S / 1 combed cotton yarn with a standard moisture regain of 8.5%. The difference in moisture regain is used to form a differential capillary effect to achieve unidirectional moisture conduction.

3. The method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric according to claim 1, characterized in that, The 12-module cyclic organization structure in step one is as follows: The first, third, fifth, seventh, ninth, and eleventh sections are made of polyester yarn woven in loops to form a moisture-wicking layer on the fabric surface; The 2nd, 4th, 6th, 8th, 10th, and 12th sections are woven with interlaced cotton yarn to form the moisture-absorbing base layer; The fabric backing features a cotton-polyester interspersed dotted pattern, with the cotton dots absorbing sweat and the polyester dots wicking it away.

4. The method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric according to claim 1, characterized in that, The weaving equipment in step one is a 28-needle 34-inch weft knitting rib knitting machine with a total of 2976 needles; the polyester yarn feed length is 26-29cm / 100 needles, and the cotton yarn feed length is 20-22cm / 100 needles.

5. The method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric according to claim 1, characterized in that, The fluorine-free environmentally friendly finishing liquid in step three includes, by weight: 35-42 parts of hydrophilic soft silicone oil, 5-10 parts of moisture-wicking agent, 1.5-4 parts of nonionic penetrant, 0.05-0.1 parts of citric acid, and 1000 parts of deionized water.

6. The method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric according to claim 1, characterized in that, The hydrophilic soft silicone oil in step three is a modified polymer multi-component copolymer silicone oil emulsion, the moisture-wicking agent is a fluorine-free hydrophilic finishing agent, and the nonionic penetrant is a polyoxyethylene ether surfactant.

7. The method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric according to claim 1, characterized in that, The finishing and setting process parameters in step three are: temperature 120-150℃, machine speed 18-25m / min, setting time 30-60s, and fabric liquid retention rate 65%-75%.

8. A fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric, comprising the method for preparing a fluorine-free, environmentally friendly, unidirectional moisture-wicking knitted fabric as described in any one of claims 1-7, characterized in that, The fabric consists of a face layer and a back layer. The face layer is a polyester woven layer, and the back layer is a cotton-polyester dotted interwoven layer. It is fluorine-free and uncoated.

9. The fluorine-free environmentally friendly unidirectional moisture-wicking knitted fabric according to claim 8, characterized in that, The bottom layer of the fabric acts as the skin-contact surface for rapid moisture absorption, while the outer layer acts as the outer surface for rapid moisture wicking and evaporation.

10. The fluorine-free environmentally friendly unidirectional moisture-wicking knitted fabric according to claim 8, characterized in that, The fabric is woven from a blend of a face fabric and a back fabric.

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