School uniform fabric with moisture absorption, quick drying, antibacterial and ultraviolet protection functions and preparation method thereof

Abstract

This invention discloses a school uniform fabric with moisture-wicking, quick-drying, antibacterial, and UV-protective functions, and its preparation method. The school uniform fabric is a weft-knitted plain weave fabric with a low-twist, high-proportion cotton blended yarn as the ground yarn and a high-twist, low-proportion cotton blended yarn as the face yarn. The reverse side of the low-twist, high-proportion cotton blended yarn, woven in loops, serves as a skin-friendly, moisture-wicking, antibacterial, and soft layer. The front side of the high-twist, low-proportion cotton blended yarn, woven in loops, serves as a quick-drying, UV-protective, and crisp layer. The low-twist, high-proportion cotton blended yarn is prepared by Siro compact spinning of cotton fibers, modified polyester antibacterial Supercool fibers, and modified polyester moisture-wicking, quick-drying Supercool fibers. The high-twist, low-proportion cotton blended yarn is prepared by Siro compact spinning of cotton fibers, modified polyester moisture-wicking, quick-drying Supercool fibers, and modified polyester UV-resistant Supercool fibers. The twist coefficient of the former is smaller than that of the latter, and the mass percentage content of cotton fibers in the former is greater than that in the latter.

Description

Technical Field

[0001] This invention belongs to the field of knitted fabric technology, specifically relating to a school uniform fabric for spring and summer polo shirts that combines moisture-wicking, quick-drying, antibacterial, and UV-protective functions, and its preparation method. Background Technology

[0002] Currently, the classic combination of short-sleeved polo shirts and athletic shorts / trousers is the summer knitted school uniform for primary and secondary school students. The knitted fabrics used for polo shirts are primarily pure cotton or cotton-polyester blends.

[0003] Pure cotton knitted fabrics are naturally soft, have a delicate feel, and offer good moisture absorption and safety. The interlocking loops in the knit structure give the fabric natural elasticity and stretch, providing a comfortable and unrestricted fit. However, pure cotton knitted fabrics also have drawbacks such as being prone to deformation, slow to dry, and difficult to care for. Therefore, they are only used in certain areas of school uniforms for lower grades or for specific needs.

[0004] Currently, the mainstream knitted fabrics for summer school uniforms generally use a blend of cotton and polyester fibers, typically 50-60% cotton and 40-50% polyester. This balances the moisture absorption of natural cotton with the wrinkle resistance and durability of synthetic fibers, while also meeting the mandatory requirement in GB / T 31888-2015 "School Uniforms for Primary and Secondary School Students" that "the cotton content in parts directly in contact with the skin shall not be less than 35%". Some school uniform fabrics, in order to reduce costs, are made from 100% ordinary polyester. However, these traditional school uniform fabrics generally have the following problems: (1) Insufficient moisture absorption and quick-drying function, students are prone to sweat retention and stickiness in high temperature environments, affecting their concentration and physical comfort; (2) Light transmission problem, summer school uniform fabrics are mainly light-colored, if the fabric is too thin or not dense enough, it is easy to transmit light when exposed to sweat or strong light, causing students' privacy anxiety, especially causing psychological burden on adolescent girls; (3) Poor appearance performance, the fabric is prone to pilling, shrinkage, and poor color fastness, affecting the appearance and use effect.

[0005] To further promote the transformation of school uniforms from "qualified products" to "functional products," various school uniform fabrics with different properties such as moisture absorption and quick drying, antibacterial and bacteriostatic properties, UV protection, and anti-pilling have emerged in recent years. For example, Chinese invention patent CN111267428B discloses a moisture-wicking school uniform fabric and its preparation method. It uses 35-50 parts cotton fiber, 50-65 parts polyester fiber, and 10-15 parts linen fiber as the moisture-wicking inner layer, and a blend of spandex and cotton fiber as the moisture-wicking outer layer to prepare a knitted base fabric. A finishing method (i.e., selectively coating a hydrophobic agent onto part of the base fabric surface through a printing process to form a hydrophobic area, while the uncoated area remains hydrophilic) gives the fabric excellent moisture-wicking properties. Chinese invention patent CN115972702B discloses an antibacterial and moisture-wicking school uniform fabric and its preparation method, using polydopamine-modified carbon nanotube materials to prepare a woven school uniform fabric. Chinese invention patent CN115287840B discloses an antibacterial and UV-protective school uniform fabric and its processing method, comprising a polyester fiber layer, an antibacterial layer, and a UV-protective layer, wherein the UV-protective layer and the antibacterial layer are woven fabrics bonded to the outer side of the polyester fiber. Chinese utility model patent CN218140291U discloses a novel water-absorbing and quick-drying school uniform fabric, comprising a skin-friendly layer, a water-absorbing layer, a quick-drying layer, a water-wicking layer, and a sun-protective layer arranged sequentially in a woven fabric, with a nano-silver antibacterial layer coated on the warp and weft threads of the water-wicking layer. Chinese invention application CN118163426A discloses a dual-repellent functional school uniform fabric and its preparation method, comprising a skin-friendly layer and a functional layer, using a blend of modified polyester fiber and cotton fiber, wherein the modified polyester fiber includes a fiber base layer (nano-scale and micron-scale polyester spinning) and a dual-repellent layer (polydopamine nanoparticles, silver nitrate, and long-chain fluorosilicone resin composite) coated on the surface of the fiber base layer, to improve the poor skin-friendliness and low comfort of polyester fiber. Chinese utility model patent CN211446082U discloses an ultralight forming double-sided knitted school uniform fabric, comprising an outer surface layer (a single-sided jacquard weft-knitted structure woven from chemical fiber filaments), a connecting layer (woven in a loop or tuck pattern), and an inner surface layer (a weft-knitted structure woven from short-fiber yarn and spandex), forming a double-sided knitted fabric with an attractive appearance, comfort, and breathability. In summary, moisture-wicking, quick-drying, antibacterial, and UV-protective properties are the development trend of new school uniform fabrics. However, existing data do not show any reports of school uniform fabrics that simultaneously integrate moisture-wicking, quick-drying, antibacterial, and UV-protective multi-functional properties, and where the cotton content is greater than 35%, and the multi-functional technical features originate entirely from the fiber material rather than from functional finishing processes.

[0006] Modified polyester supercool fiber undergoes chemical modification by grafting hydrophilic groups onto the polyethylene terephthalate polymer chain. Physical modification results in a Y-shaped fiber cross-section and microgrooved pores on the longitudinal surface. The combined effect of these chemical and physical modifications gives this modified polyester supercool fiber superior moisture absorption, wicking, and quick-drying properties compared to conventional polyester fibers, along with a soft touch; it is also known as modified polyester moisture-wicking and quick-drying supercool fiber. Based on this moisture-wicking and quick-drying supercool fiber, if 1-5% by mass of micro-nano structured zinc derived from natural minerals is blended during the fiber spinning process, it becomes a modified polyester antibacterial supercool fiber, possessing both antibacterial and bacteriostatic functions. If 1-5% by mass of nano-sized titanium dioxide is blended during the fiber spinning process, it becomes a modified polyester UV-resistant supercool fiber, also possessing UV-resistant functions. Summary of the Invention

[0007] To address the shortcomings of the prior art, the present invention aims to provide a school uniform fabric with moisture-wicking, quick-drying, antibacterial, and UV-protective functions, as well as a method for its preparation.

[0008] This invention selects various modified polyester supercool fibers with different functional characteristics and long-staple cotton fibers. Through comprehensive design of fiber composition, yarn fineness, twist, and fabric structure, blended yarns and knitted fabrics are prepared. The prepared fabrics have a cotton content of more than 35%, and have multiple functions such as moisture absorption and quick drying, antibacterial and UV protection. They also have comfortable wearing performance and physical and mechanical properties such as breathability, softness against the skin, smooth fabric surface, moderate elasticity, good anti-pilling and anti-fuzzing, and high color fastness. No functional finishing is required, and the functions are durable and stable, making them suitable for industrial-scale production of functional school uniforms.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: Option 1 This invention provides a school uniform fabric with moisture-wicking, quick-drying, antibacterial, and UV-protective functions. The fabric is characterized by a weft-knit plain weave structure, with a low-twist, high-proportion cotton blend yarn as the ground yarn and a high-twist, low-proportion cotton blend yarn as the face yarn. The reverse side of the low-twist, high-proportion cotton blend yarn, woven in loops, serves as a soft, moisture-wicking, antibacterial layer close to the skin. The front side of the high-twist, low-proportion cotton blend yarn, woven in loops, serves as a quick-drying, UV-protective, and crisp layer away from the skin. The low-twist, high-proportion cotton blend yarn is composed of cotton fibers and modified polyester antibacterial Supercool fibers. The high-twist, low-proportion cotton blended yarn is made from cotton fiber, modified polyester moisture-wicking and quick-drying Supercool fiber, and modified polyester UV-resistant Supercool fiber through Siro compact spinning. The twist coefficient of the low-twist, high-proportion cotton blended yarn is smaller than that of the high-twist, low-proportion cotton blended yarn, and the mass percentage content of cotton fiber in the low-twist, high-proportion cotton blended yarn is greater than that in the high-twist, low-proportion cotton blended yarn.

[0010] The school uniform fabric provided by this invention may also have the following feature: the twist direction of the low-twist, high-proportion cotton blended yarn is opposite to that of the high-twist, low-proportion cotton blended yarn.

[0011] The school uniform fabric provided by this invention may also have the following characteristics: the low-twist, high-proportion cotton blended yarn is composed of 65% cotton fiber, 25% modified polyester moisture-wicking and quick-drying Supercool fiber, and 10% modified polyester UV-resistant Supercool fiber by mass percentage; the high-twist, low-proportion cotton blended yarn is composed of 20% cotton fiber, 50% modified polyester moisture-wicking and quick-drying Supercool fiber, and 30% modified polyester UV-resistant Supercool fiber by mass percentage.

[0012] The school uniform fabric provided by this invention may also have the following characteristics: the fineness of the low-twist high-proportion cotton blended yarn is 50S and the twist coefficient is 310, and the fineness of the high-twist low-proportion cotton blended yarn is 36S and the twist coefficient is 380.

[0013] Option Two This invention also provides a method for preparing a school uniform fabric with moisture-wicking, quick-drying, antibacterial, and UV-protective functions, as shown in <Scheme 1>, characterized by the following steps: Knitting: A single-sided circular knitting machine with a cylinder diameter of 34 inches and a gauge of 24 needles / inch is selected. Low-twist, high-proportion cotton blended yarn is used as the ground yarn and high-twist, low-proportion cotton blended yarn is used as the face yarn to weave a raw fabric with a plain weft knitting structure. Fabric finishing: The raw fabric is subjected to pretreatment, dyeing and washing of modified polyester fibers, dyeing and washing of cotton fibers, and heat setting processes in sequence to finally obtain the finished fabric.

[0014] The preparation method provided by this invention may also have the following features: the pretreatment process is as follows: a liquor ratio of 1:10, room temperature water is injected into the airflow dyeing machine, the main pump is started, and the fabric is placed in and circulated for 10 minutes; soap powder with a concentration of 1 g / L and caustic soda with a concentration of 2 g / L are injected into the cylinder of the airflow dyeing machine, the temperature is raised to 80°C at 2°C / min, and the temperature is maintained for 20 minutes; glacial acetic acid with a concentration of 1 g / L is injected, and pretreatment is carried out at a temperature of 80°C and a running time of 10 minutes, and then the temperature is naturally cooled to room temperature and washed with cold water.

[0015] The preparation method provided by this invention may also have the following characteristics: the dyeing and washing process of the modified polyester fiber is as follows: a liquor ratio of 1:10; room temperature water is injected into the high-temperature and high-pressure dyeing machine cylinder; the main pump is started; a 1% concentration of disperse dye is injected into the dyeing machine cylinder and run for 1 minute; a dispersing agent NNO at a weight ratio of 1 g / L of the fabric is injected and run for 1 minute; glacial acetic acid is injected to adjust the pH value of the solution in the cylinder to 5.5; the fabric is placed in and circulated for 10 minutes; the temperature is increased from room temperature to 90°C at a rate of 2.0°C / min and held for 5 minutes; then the temperature is increased again at a rate of 1.0°C / min. The temperature is raised to the fixing temperature of 115℃ at a rising rate and held for 35 minutes. Then, the temperature is lowered to 65℃ at a cooling rate of 1℃ / minute. Samples are taken for color matching. After color confirmation, the liquid is drained and the product is washed with cold water. A reduction cleaning method is used. Room temperature water is injected into the dyeing machine cylinder at a high temperature and high pressure. The main pump is started. After the fabric is placed in and run for 10 minutes, sodium hydrosulfite (2g / L by weight of fabric) and soda ash (2g / L by weight of fabric) are injected into the dyeing machine cylinder. After running for 5 minutes, the temperature is raised from room temperature to 80℃ at a rising rate of 2.0℃ / minute. After holding for 15 minutes, the temperature is allowed to cool naturally to room temperature before being washed with cold water.

[0016] The preparation method provided by this invention may also have the following features: the cotton fiber dyeing and washing process is as follows: a liquor ratio of 1:10; room temperature water is injected into the high-temperature and high-pressure dyeing machine cylinder; the main pump is started; 6% reactive dye, 50g / L sodium sulfate (by weight of the fabric), and 30g / L soda ash (by weight of the fabric) are injected into the dyeing machine cylinder; the process is run for 1 minute; the fabric is placed in and circulated for 10 minutes; the temperature is increased from room temperature to 60℃ at a rate of 1.0℃ / minute; and the temperature is maintained for 60 minutes. Then, the temperature is lowered to 25°C at a rate of 1°C / minute before being removed from the machine and washed with cold water. A soaping method is used: room temperature water is injected into the high-temperature, high-pressure dyeing machine cylinder, the main pump is started, and the fabric is placed in and run for 10 minutes. Then, soap powder at a ratio of 1 g / L to the fabric weight and soda ash at a ratio of 0.5 g / L to the fabric weight are injected into the dyeing machine cylinder. After running for 10 minutes, the temperature is increased from room temperature to 100°C at a rate of 3.0°C / minute, held for 10 minutes, and then allowed to cool naturally to room temperature. The fabric is then washed with hot water first, followed by a cold water wash.

[0017] The preparation method provided by the present invention may also have the following features: the heat setting process is as follows: the fabric is heat set using a Montex 6500 hot air tenter frame, and the heat setting is performed at a setting temperature of 190°C with a processing speed of 15 m / min and an overfeed ratio of 5%.

[0018] The preparation method provided by this invention may also have the following characteristic: the basis weight of the raw fabric is 205 g / m². 2 The finished fabric has a weight of 210 g / m². 2 .

[0019] Compared with the prior art, the present invention has the following advantages: (1) The school uniform fabric of the present invention not only meets the mandatory requirement of "the cotton content of the part that directly contacts the skin shall not be less than 35%" in GB / T 31888-2015 standard, but also has multiple composite functions such as moisture absorption and quick drying, antibacterial and UV protection, and has good function retention and durability.

[0020] The moisture absorption of the fabric of this invention mainly comes from the cotton fiber, which accounts for 38.8% of the inner and outer layers of the fabric, and the modified polyester supercool fiber has better moisture absorption than conventional polyester fiber; the quick-drying, antibacterial, and UV protection composite functions mainly come from the modified polyester supercool fiber, which accounts for 61.2%. The fabric consists of two main layers: the inner layer is a Siro compact spun blend of low-twist cotton fiber / modified polyester antibacterial supercool fiber / modified polyester moisture-wicking and quick-drying supercool fiber (65 / 25 / 10), which has the softness and moisture-wicking properties of 65% cotton fiber and the antibacterial properties of 25% modified polyester antibacterial supercool fiber. The inner layer is characterized by moisture-wicking, antibacterial, and softness. The outer layer is a Siro compact spun blend of high-twist cotton fiber / modified polyester moisture-wicking and quick-drying supercool fiber / modified polyester UV-resistant supercool fiber (20 / 50 / 30), in which 50% modified polyester moisture-wicking and quick-drying supercool fiber, together with the 10% modified polyester moisture-wicking and quick-drying supercool fiber in the inner layer, gives the overall fabric good quick-drying characteristics. The 30% modified polyester UV-resistant supercool fiber provides UV protection. The outer layer is characterized by quick-drying, UV protection, and crispness. Because the inner layer of the fabric contains 65% cotton fiber and the outer layer contains 20% cotton fiber, the cotton fiber content in the entire fabric is ensured to be 38.8% (35%) based on the fineness of the blended yarns and the proportion of cotton fiber in the inner and outer layers. Since the fabric's moisture-wicking, quick-drying, antibacterial, and UV-protective functions are entirely derived from modified polyester Supercool fiber, and no functional finishing is added, these functions will not diminish with repeated washing, resulting in excellent retention and durability.

[0021] (2) The inner layer of the fabric is soft to the touch, has a crisp appearance, good color fastness, and the coils are straight and of good quality.

[0022] The inner layer of the fabric is a Siro-woven compact blend of 50S, Z-twist, and 310 twist cotton / modified polyester antibacterial supercool fiber / modified polyester moisture-wicking and quick-drying supercool fiber (65 / 25 / 10). The low-twist yarn makes the fabric soft to the touch, and the 65% cotton fiber contributes to its soft feel. The modified polyester supercool fiber is softer than regular polyester fiber, giving the inner layer a comprehensive soft and comfortable feel. The outer layer is a Siro-woven compact blend of 36S, S-twist, and 380 twist cotton / modified polyester moisture-wicking and quick-drying supercool fiber / modified polyester UV-resistant supercool fiber (20 / 50 / 30). The high-twist yarn gives the fabric a crisp and clean look, and the 80% modified polyester supercool fiber has a higher modulus than cotton, further enhancing its crispness. The modified polyester supercool fiber also exhibits excellent colorfastness, producing vibrant colors after dyeing, and is resistant to washing, perspiration, and light. Both cotton fiber and modified polyester Supercool fiber have excellent anti-pilling properties. The inner layer blended yarns are Z-twist and the outer layer blended yarns are S-twist, ensuring upright wale patterns and eliminating the skewed wale patterns found in weft-knitted fabrics using multi-path circular knitting machines. Combined with the weft-knitting weft-addition structure and the high porosity between the loops themselves and between loops in the knitted fabric, the fabric exhibits excellent breathability and superior wearing comfort.

[0023] (3) The preparation process is simple, and it is waterproof and easy to care for.

[0024] This fabric is a double-layered material made from a blend of cotton fiber and modified polyester Supercool fiber, preferably in varying proportions of moisture-wicking, quick-drying, antibacterial, and UV-resistant modified polyester Supercool fibers. The blend is then knitted with intercalation yarns and dyed and set using a two-bath dyeing process. The entire manufacturing process is simple. The finished fabric weight is controlled at 210 g / m². 2 The fabric is double-knitted using a high-gauge (24 needles / inch) single-sided circular weft knitting machine, resulting in a lightweight yet non-transparent material. The use of modified polyester fibers, comprising over 60% of the fabric, ensures excellent recovery and shape retention after washing, making it easy to care for and maintain for everyday wear. Detailed Implementation

[0025] The following further explains the concept, specific structure, and technical effects of the present invention in order to fully understand the purpose, features, and effects of the present invention.

[0026] <Example> This invention provides a school uniform fabric that combines moisture-wicking, quick-drying, antibacterial, and UV-protective functions. The school uniform fabric is a weft-knitted plain weave fabric with a low-twist, high-proportion cotton blended yarn as the ground yarn and a high-twist, low-proportion cotton blended yarn as the face yarn. The reverse side of the low-twist, high-proportion cotton blended yarn, woven in loops, serves as a skin-friendly, moisture-wicking, antibacterial, and soft layer, while the front side of the high-twist, low-proportion cotton blended yarn, woven in loops, serves as a quick-drying, UV-protective, and crisp layer away from the skin.

[0027] The low-twist, high-proportion cotton blended yarn is made from cotton fiber, modified polyester antibacterial supercool fiber, and modified polyester moisture-wicking and quick-drying supercool fiber through Siro compact spinning. The high-twist, low-proportion cotton blended yarn is made from cotton fiber, modified polyester moisture-wicking and quick-drying supercool fiber, and modified polyester UV-resistant supercool fiber through Siro compact spinning. Furthermore, the twist coefficient of the low-twist, high-proportion cotton blended yarn is smaller than that of the high-twist, low-proportion cotton blended yarn, the mass percentage content of cotton fiber in the low-twist, high-proportion cotton blended yarn is greater than that in the high-twist, low-proportion cotton blended yarn, and the twist direction of the low-twist, high-proportion cotton blended yarn is opposite to that of the high-twist, low-proportion cotton blended yarn.

[0028] In this embodiment, the low-twist, high-proportion cotton blended yarn is composed of 65% cotton fiber, 25% modified polyester moisture-wicking and quick-drying supercool fiber, and 10% modified polyester UV-resistant supercool fiber by mass percentage. Its fineness is 50S, its twist coefficient is 310, and its twist direction is Z-twist.

[0029] The high-twist, low-proportion cotton blended yarn is made of 20% cotton fiber, 50% modified polyester moisture-wicking and quick-drying Supercool fiber, and 30% modified polyester UV-resistant Supercool fiber by weight percentage. Its fineness is 36S, its twist coefficient is 380, and its twist direction is S-twist.

[0030] The present invention also provides a method for preparing the above-mentioned school uniform fabric with moisture-wicking, quick-drying, antibacterial and UV-protective functions, the method comprising yarn preparation, knitting manufacturing and fabric finishing steps.

[0031] (a) Yarn preparation The ground yarn and face yarn are prepared using the Siro compact spinning process.

[0032] Ground yarn: A low-twist, high-proportion cotton blend yarn is selected, consisting of 65% cotton fiber, 25% modified polyester moisture-wicking and quick-drying Supercool fiber, and 10% modified polyester UV-resistant Supercool fiber by weight percentage. Its fineness is 50S, twist coefficient is 310, and twist direction is Z-twist. The modified polyester antibacterial Supercool fiber is blended with 3% by weight of micro-nano structured zinc material derived from natural minerals during the spinning process.

[0033] Yarn: A high-twist, low-proportion cotton blend yarn is used, composed of 20% cotton fiber, 50% modified polyester moisture-wicking and quick-drying Supercool fiber, and 30% modified polyester UV-resistant Supercool fiber by weight percentage. Its fineness is 36S, twist coefficient is 380, and twist direction is S-twist. The modified polyester UV-resistant Supercool fiber is blended with 3% nano-sized titanium dioxide by weight during the spinning process.

[0034] (ii) Knitting Weave structure: Weft plain knit weave, the ground yarn is the low-twist, high-proportion cotton blended yarn mentioned above, and the face yarn is the high-twist, low-proportion cotton blended yarn mentioned above.

[0035] Machine parameters: Woven on a single-jersey circular knitting machine with a bobbin diameter of 34 inches and a gauge of 24 needles / inch, the width of the raw fabric is 192 cm, and the weight per square meter is 205 g / m². 2 .

[0036] (III) Fabric finishing The raw fabric is processed sequentially through pretreatment, dyeing and washing of modified polyester fibers, dyeing and washing of cotton fibers, and heat setting to finally obtain the finished fabric.

[0037] The pretreatment process is as follows: liquor ratio 1:10, room temperature water is injected into the airflow dyeing machine, the main pump is started, and the fabric is placed in and circulated for 10 minutes; soap powder with a concentration of 1g / L and caustic soda with a concentration of 2g / L are injected into the cylinder of the airflow dyeing machine, the temperature is raised to 80℃ at 2℃ / min, and kept at the temperature for 20 minutes; glacial acetic acid with a concentration of 1g / L is injected, and pretreatment is carried out at a temperature of 80℃ for a running time of 10 minutes, and then the temperature is naturally cooled to room temperature before cold water washing.

[0038] The process for dyeing and washing modified polyester fibers is as follows: A liquor ratio of 1:10 is used. Room temperature water is injected into the dyeing cylinder of the high-temperature, high-pressure dyeing machine. The main pump is started, and a 1% concentration of disperse dye is injected into the cylinder, which is then run for 1 minute. A 1g / L concentration of dispersing agent NNO is injected, and the process is run for 1 minute. Glacial acetic acid is injected to adjust the pH of the solution in the cylinder to 5.5. The fabric is then placed in the cylinder and circulated for 10 minutes. The temperature is increased from room temperature to 90℃ at a rate of 2.0℃ / min and held for 5 minutes. Finally, the temperature is increased to the fixing temperature at a rate of 1.0℃ / min. The dyeing machine is heated to 115℃ for 35 minutes. After that, it is cooled to 65℃ at a rate of 1℃ / minute. A sample is taken for color matching. After the color is confirmed, the dyeing liquid is drained and the product is washed with cold water. The reduction cleaning method is used. Room temperature water is injected into the dyeing machine cylinder at high temperature and high pressure. The main pump is started. After the fabric is placed in and run for 10 minutes, sodium hydrosulfite (2g / L of fabric weight) and soda ash (2g / L of fabric weight) are injected into the dyeing machine cylinder. After running for 5 minutes, the temperature is increased from room temperature to 80℃ at a rate of 2.0℃ / minute. After holding at this temperature for 15 minutes, the temperature is allowed to cool naturally to room temperature before washing with cold water.

[0039] The cotton fiber dyeing and washing process is as follows: A liquor ratio of 1:10 is used. Room temperature water is injected into the high-temperature, high-pressure dyeing machine cylinder. The main pump is started, and a 6% concentration of reactive dye, 50 g / L sodium sulfate (by weight of the fabric), and 30 g / L soda ash (by weight of the fabric) are injected into the dyeing machine cylinder. The machine runs for 1 minute, then the fabric is placed in and circulated for 10 minutes. The temperature is increased from room temperature to 60°C at a rate of 1.0°C / minute and held for 60 minutes. Afterward, the temperature is decreased at a rate of 1°C / minute. Cool the fabric to 25°C before removing it from the machine and perform a cold water wash. Use a soap wash method: inject room temperature water into the dyeing machine cylinder at high temperature and high pressure, start the main pump, put in the fabric and run for 10 minutes, then inject soap powder at a ratio of 1g / L of fabric weight and soda ash at a ratio of 0.5g / L of fabric weight into the dyeing machine cylinder. After running for 10 minutes, raise the temperature from room temperature to 100°C at a rate of 3.0°C / min, keep it at that temperature for 10 minutes, and then let it cool naturally to room temperature. Perform a hot water wash first, followed by a cold water wash.

[0040] The heat setting process is as follows: The fabric is heat-set using a Montex 6500 hot air tenter. The heat setting is carried out at a setting temperature of 190℃, a processing speed of 15m / min, and an overfeed ratio of 5%. This process eliminates the internal stress and wrinkles generated in the previous process and provides better dimensional stability.

[0041] The finished fabric, after finishing, contains 38.8% cotton fiber and 61.2% modified polyester fiber (Supercool); its width is 188cm and its weight per square meter is 210g / m². 2 .

[0042] Referencing GB / T 21655.1-2023 "Evaluation of the moisture absorption and quick-drying properties of textiles - Part 1: Single-item combination test method", GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles", GB / T 18830-2009 "Evaluation of the UV protection properties of textiles", GB / T5453-1997 "Determination of air permeability of textile fabrics", GB / T4802.1-2008 "Determination of pilling properties of textile fabrics - Part 2: Modified Martindale method", GB / T 3922-2013 "Color fastness test of textiles - Color fastness to perspiration", GB / T 3920-2008 "Color fastness test of textiles - Color fastness to rubbing", GB / T 3921-2008 "Color fastness test of textiles - Color fastness to soaping", GB / T The test results were obtained by using standards such as 8427-2019 "Textiles - Tests for color fastness to artificial light: Xenon arc" to test the moisture absorption and quick-drying properties, antibacterial properties, UV resistance, breathability, pilling resistance, color fastness to perspiration, color fastness to rubbing, color fastness to washing with soap, and color fastness to light. The results are shown in Table 1.

[0043] Table 1 As can be seen from the test results in Table 1, the school uniform fabric of the present invention has multiple functions such as moisture absorption and quick drying, antibacterial and UV protection, and has good breathability, anti-pilling and anti-fuzzing properties, and color fastness.

[0044] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A school uniform fabric with moisture-wicking, quick-drying, antibacterial, and UV-protective functions, characterized in that: The school uniform fabric is a weft-knitted fabric with a ground yarn of low-twist, high-proportion cotton blend yarn and a face yarn of high-twist, low-proportion cotton blend yarn. The reverse side of the low-twist, high-proportion cotton blend yarn, woven in loops, serves as a skin-friendly, moisture-wicking, antibacterial, and soft layer, while the front side of the high-twist, low-proportion cotton blend yarn, woven in loops, serves as a quick-drying, UV-protective, and crisp layer away from the skin. The low-twist, high-proportion cotton blended yarn is prepared from cotton fiber, modified polyester antibacterial Supercool fiber, and modified polyester moisture-wicking and quick-drying Supercool fiber through a Siro compact spinning process. The high-twist, low-ratio cotton blended yarn is prepared from cotton fiber, modified polyester moisture-wicking and quick-drying Supercool fiber, and modified polyester UV-resistant Supercool fiber through a Siro compact spinning process. The twist coefficient of the low-twist, high-proportion cotton blended yarn is smaller than that of the high-twist, low-proportion cotton blended yarn, and the mass percentage content of cotton fibers in the low-twist, high-proportion cotton blended yarn is greater than that in the high-twist, low-proportion cotton blended yarn.

2. The school uniform fabric according to claim 1, characterized in that: wherein The twist direction of the low-twist, high-proportion cotton blended yarn is opposite to that of the high-twist, low-proportion cotton blended yarn.

3. The school uniform fabric according to claim 1, characterized in that: wherein, The low-twist, high-proportion cotton blended yarn is composed of 65% cotton fiber, 25% modified polyester moisture-wicking and quick-drying Supercool fiber, and 10% modified polyester UV-resistant Supercool fiber by weight percentage. The high-twist, low-proportion cotton blended yarn is composed of 20% cotton fiber, 50% modified polyester moisture-wicking and quick-drying Supercool fiber, and 30% modified polyester UV-resistant Supercool fiber by weight percentage.

4. The school uniform fabric according to claim 1, characterized in that: wherein The low-twist, high-proportion cotton blended yarn has a fineness of 50S and a twist coefficient of 310. The fineness of the high-twist, low-proportion cotton blended yarn is 36S, and the twist coefficient is 380.

5. The method for preparing the school uniform fabric with the functions of moisture absorption, quick drying, antibiosis and anti-ultraviolet according to claim 1, characterized in that, Includes the following steps: Knitting: A single-sided circular knitting machine with a cylinder diameter of 34 inches and a gauge of 24 needles / inch is selected. Low-twist, high-proportion cotton blended yarn is used as the ground yarn and high-twist, low-proportion cotton blended yarn is used as the face yarn to weave a raw fabric with a plain weft knitting structure. Fabric finishing: The raw fabric is subjected to pretreatment, dyeing and washing of modified polyester fibers, dyeing and washing of cotton fibers, and heat setting processes in sequence to finally obtain the finished fabric.

6. The preparation method according to claim 5, characterized in that: in, The pretreatment process is as follows: liquor ratio 1:10, room temperature water is injected into the airflow dyeing machine, the main pump is started, and the fabric is placed in and circulated for 10 minutes; soap powder with a concentration of 1g / L and caustic soda with a concentration of 2g / L are injected into the cylinder of the airflow dyeing machine, the temperature is raised to 80℃ at 2℃ / min, and kept at the temperature for 20 minutes; glacial acetic acid with a concentration of 1g / L is injected, and pretreatment is carried out at a temperature of 80℃ for a running time of 10 minutes, and then the temperature is naturally cooled to room temperature before cold water washing.

7. The preparation method according to claim 5, characterized in that: wherein, The process for dyeing and washing modified polyester fibers is as follows: A liquor ratio of 1:10 is used. Room temperature water is injected into the dyeing cylinder of the high-temperature, high-pressure dyeing machine. The main pump is started, and a 1% concentration of disperse dye is injected into the cylinder, which is then run for 1 minute. A 1g / L concentration of dispersing agent NNO is injected, and the process is run for 1 minute. Glacial acetic acid is injected to adjust the pH of the solution in the cylinder to 5.

5. The fabric is then placed in the cylinder and circulated for 10 minutes. The temperature is increased from room temperature to 90℃ at a rate of 2.0℃ / min and held for 5 minutes. Finally, the temperature is increased to the fixing temperature at a rate of 1.0℃ / min. The dyeing machine is heated to 115℃ for 35 minutes. After that, it is cooled to 65℃ at a rate of 1℃ / minute. A sample is taken for color matching. After the color is confirmed, the dyeing liquid is drained and the product is washed with cold water. The reduction cleaning method is used. Room temperature water is injected into the dyeing machine cylinder at high temperature and high pressure. The main pump is started. After the fabric is placed in and run for 10 minutes, sodium hydrosulfite (2g / L of fabric weight) and soda ash (2g / L of fabric weight) are injected into the dyeing machine cylinder. After running for 5 minutes, the temperature is increased from room temperature to 80℃ at a rate of 2.0℃ / minute. After holding at this temperature for 15 minutes, the temperature is allowed to cool naturally to room temperature before washing with cold water.

8. The preparation method according to claim 5, characterized in that: wherein The cotton fiber dyeing and washing process is as follows: A liquor ratio of 1:10 is used. Room temperature water is injected into the high-temperature, high-pressure dyeing machine cylinder. The main pump is started, and a 6% concentration of reactive dye, 50 g / L sodium sulfate (by weight of the fabric), and 30 g / L soda ash (by weight of the fabric) are injected into the dyeing machine cylinder. The machine runs for 1 minute, then the fabric is placed in and circulated for 10 minutes. The temperature is increased from room temperature to 60°C at a rate of 1.0°C / minute and held for 60 minutes. Afterward, the temperature is decreased at a rate of 1°C / minute. Cool the fabric to 25°C before removing it from the machine and perform a cold water wash. Use a soap wash method: inject room temperature water into the dyeing machine cylinder at high temperature and high pressure, start the main pump, put in the fabric and run for 10 minutes, then inject soap powder at a ratio of 1g / L of fabric weight and soda ash at a ratio of 0.5g / L of fabric weight into the dyeing machine cylinder. After running for 10 minutes, raise the temperature from room temperature to 100°C at a rate of 3.0°C / min, keep it at that temperature for 10 minutes, and then let it cool naturally to room temperature. Perform a hot water wash first, followed by a cold water wash.

9. The preparation method according to claim 5, characterized in that: wherein, The heat setting process is as follows: the fabric is heat-set using a Montex 6500 hot air tenter frame at a setting temperature of 190℃, with a processing speed of 15m / min and an overfeed ratio of 5%.

10. The preparation method according to claim 5, characterized in that: wherein The greige fabric has a mass per square meter of 205 g / m 2 , The finished fabric has a weight of 210 g / m 2 .

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