A multifunctional knitted fabric with sun protection and heat shielding properties and its preparation method

Abstract

This invention discloses a multifunctional knitted fabric with sun protection and heat shielding properties. From the outside in, it comprises an outer layer, a middle layer, and an inner layer. The outer layer includes a heat shielding layer and a knitted layer, with the knitted layer covering the outside of the heat shielding layer. The heat shielding layer is woven from heat shielding filaments and cotton yarn, with sun-protective and heat-shielding agents attached to the outside of the heat shielding filaments. The knitted layer is woven from a combination of profiled cross-section filaments and spandex fibers, with the profiled cross-section filaments covering 50%-75% of the outer layer. The middle layer is woven from blended yarn, which is composed of the following raw materials in parts by weight: 50-70 parts elastic polyester fiber and 20-35 parts hollow fiber. This invention relates to the field of knitted fabric technology. This multifunctional knitted fabric with sun protection and heat shielding provides excellent heat insulation while also exhibiting good moisture absorption and antibacterial properties.

Description

Technical Field

[0001] This invention relates to the field of knitted fabric technology, specifically to a multifunctional knitted fabric with sun protection and heat shielding properties, and its preparation method. Background Technology

[0002] As people's living standards continue to improve, more and more are pursuing a higher quality of life, and clothing is especially valued. Modern clothing is no longer just a tool for covering the body and keeping warm, but a reflection of one's temperament, taste, and attitude towards life. People's requirements for clothing have gradually shifted from the initial pursuit of warmth to a focus on comfort and functionality. People generally have the following requirements for summer clothing: 1. Good breathability, lightweight and breathable; 2. Good moisture absorption, as the hot summer weather makes it easy to sweat, and the ability to absorb sweat is very important; 3. Especially in summer, when the sun is strong, sun protection is necessary, and clothing should have a certain degree of sun protection. Knitted fabrics are fabrics formed by bending yarns into loops and interlocking them using knitting needles. The difference between knitted and woven fabrics lies in the different forms of yarns in the fabric. Knitting is divided into weft knitting. Knitted fabrics are widely used in clothing fabrics and linings, home textiles, and other products, and are loved by consumers.

[0003] However, most knitted fabrics on the market currently have poor sun protection performance, and heat tends to accumulate inside the fabric, causing stuffiness. At the same time, the fabric's moisture absorption is also relatively poor, and human sweat tends to remain on the skin's surface, leading to poor skin condition. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional knitted fabric with sun protection and heat shielding, comprising, from the outside in, an outer layer, a middle layer, and an inner layer. The outer layer includes a heat shielding layer and a woven layer, with the woven layer covering the outside of the heat shielding layer. The heat shielding layer is woven from heat shielding filaments and cotton yarn, and the heat shielding filaments are coated with a sun-protective and heat-shielding factor, which can be selected from titanium dioxide or ceramic powder. The woven layer is woven from a combination of profiled cross-section filaments and spandex fibers, with the profiled cross-section filaments covering 50%-75% of the outer layer. The middle layer is woven from blended yarn, which is composed of the following raw materials in parts by weight: 50-70 parts elastic polyester fiber and 20-35 parts hollow fiber. The inner layer is woven from antibacterial fiber and fluffy yarn, with the fluffy yarn covering 60%-70% of the inner layer. The preparation process of the antibacterial fiber is as follows:

[0005] 1) At 90-95℃, bentonite and dilute nitric acid solution are mixed to prepare the first mixture;

[0006] 2) At 55-65℃, the first mixture in 1) is mixed with water to prepare the second mixture;

[0007] 3) Mix the second mixture from 2), sodium dodecylbenzenesulfonate, and amino acids to prepare a third mixture;

[0008] 4) Under pH conditions of 7-7.5, the third mixture in 3) is reacted with zinc sulfate to produce zinc-loaded bentonite;

[0009] 5) At 15-30℃, zinc-loaded bentonite, anhydrous ethanol and coupling agent are mixed to prepare a fourth mixture, and then the fourth mixture is brushed onto viscose fiber to make antibacterial fiber.

[0010] Preferably, the amino acid is a mixture of glycine and valine, wherein the mixing ratio of glycine and valine is 20 parts glycine and 30 parts valine, and the coupling agent is a coupling agent with the brand name KH-560.

[0011] Preferably, in step 1), the concentration of nitric acid in the dilute nitric acid solution is 1.4 mol / L-1.7 mol / L, and the amount of the dilute nitric acid solution used is 30-40 parts by weight relative to 1 part by weight of the bentonite.

[0012] Preferably, relative to 100 parts by weight of the second mixture, the amount of sodium dodecylbenzenesulfonate is 6-12 parts by weight, and the amount of amino acid is 5-8 parts by weight.

[0013] Preferably, the amount of zinc sulfate used is 6-8 parts by weight relative to 100 parts by weight of the third mixture.

[0014] Preferably, relative to 1 part by weight of antibacterial fiber, the amount of anhydrous ethanol is 20-25 parts by weight, and the amount of coupling agent is 2-2.5 parts by weight.

[0015] Preferably, the amount of water used is 100-140 parts by weight relative to 100 parts by weight of the first mixture.

[0016] Preferably, the weaving steps of the braided layer are as follows:

[0017] ①. Stitch arrangement: Use high-foot and low-foot needles alternately in a row, with four rows forming a cycle, i.e., ABAB; in rows 1 and 2, B needles are used for floating yarn, and A needles are used for floating yarn; in rows 3 and 4, B needles are used for loops, and A needles are used for floating yarn.

[0018] ②. Yarn threading and weaving: The first and third threads thread spandex fibers, and the second and fourth threads thread filaments with irregular cross sections. After the yarn threading is completed, weaving is carried out.

[0019] The irregularly shaped cross-section filaments are selected from one of the following: circular cross-section, cross-section, or flat cross-section. The combination of the moisture-absorbing and quick-drying characteristics of the irregularly shaped cross-section filaments and the antibacterial fibers achieves a better antibacterial effect.

[0020] A method for preparing a multifunctional knitted fabric with sun protection and heat shielding, comprising the following steps:

[0021] S1. Using polylactic acid yarn as raw material, the basic fabric is woven using weft knitting technology according to the structure of outer layer, middle layer and inner layer. The specific knitting process is as follows:

[0022] The knitting is performed using a double-sided circular knitting machine, with the needle cylinders and needle plates arranged in a staggered pattern. The pattern is repeated in six rows. The first and fourth rows form the outer layer, the second and fifth rows form the inner layer, and the third and sixth rows form the connecting layer.

[0023] The first route consists of 150D / 96F polylactic acid filaments with a circular cross-section, which are completely looped on the needle plate.

[0024] The second route involves alternating loops of 150D / 96F polylactic acid filaments with a circular cross-section on a syringe needle.

[0025] The third route involves 150D / 96F polylactic acid filaments with a hollow tubular cross-section, which are alternately looped and then rolled together on the needle plate and syringe needle.

[0026] The fourth route involves the complete looping of 150D / 96F polylactic acid filaments with a circular cross-section on the needle plate.

[0027] The fifth route uses 150D / 96F polylactic acid filaments with a circular cross-section, which are knitted alternately on a syringe needle, forming loops one stitch and then tucking loops the next.

[0028] The sixth route uses 150D / 96F polylactic acid filaments with a hollow tubular cross-section, which are knitted in alternating loops on the needle bed and cylinder needles. The knitting needles knitted in the front needle bed are the same as those in the third route.

[0029] The above six paths form a cycle, repeating endlessly.

[0030] After weaving using the above methods, the basic fabric is finally formed;

[0031] S2. Pre-design the base fabric;

[0032] S3. Dye the base fabric that has undergone the pre-forming process in S2.

[0033] S4. After dyeing, the base fabric undergoes dehydration, drying, wrinkle-resistant treatment, softening, and shaping to become a multifunctional knitted fabric.

[0034] This invention provides a multifunctional knitted fabric with sun protection and heat shielding properties, and a method for preparing the same. It offers the following advantages:

[0035] 1. This multifunctional knitted fabric with sun protection and heat shielding, and its preparation method, involves adding heat-shielding filaments to the outer layer of the fabric and attaching sun-protective and heat-shielding factors to the outer surface of the heat-shielding filaments. Combined with the elastic polyester fibers and hollow fibers in the middle layer, some of the heat passing through the heat-shielding filaments can be isolated by the polyester fibers and hollow fibers. The setting of polyester fibers and hollow fibers further enhances the heat insulation ability of the fabric, giving it a good heat insulation effect. It can block external heat from entering the fabric and effectively lock in internal heat, preventing internal heat from escaping to the outside. The use effect is good. In addition, the inner surface layer, which is in direct contact with the user, is made of soft, fluffy yarn and antibacterial fibers, making the user feel more comfortable.

[0036] 2. This multifunctional knitted fabric with sun protection and heat insulation properties, and its preparation method, involves adding a modal-containing knitted layer to the outer layer. Due to its excellent moisture absorption, modal can absorb sweat produced by the human body, keeping the skin surface dry. Furthermore, the main moisture-absorbing structure is located in the outer layer, not in direct contact with the skin. After absorbing sweat, the sweat in the outer layer will not cause discomfort to the body, preventing the fabric from sticking to the skin and improving comfort. Moreover, because the knitted layer is located inside the outer layer, the sweat absorbed inside can fully contact the external environment, allowing for rapid evaporation and dissipation, greatly enhancing the fabric's moisture absorption capacity.

[0037] 3. This multifunctional knitted fabric with sun protection and heat shielding, and its preparation method, features an inner surface layer woven from antibacterial fibers and fluffy yarns. Since the inner surface layer is in direct contact with the human body, the antibacterial fibers enhance the fabric's antibacterial ability, making it less prone to bacterial growth in the parts of the fabric that come into direct contact with the human body, thus directly protecting the human body surface. Furthermore, the fluffy yarns improve the comfort of the parts of the fabric that come into contact with the human body, thereby effectively ensuring both antibacterial properties and comfort. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the first embodiment, the present invention provides a technical solution: a multifunctional knitted fabric with sun protection and heat shielding, comprising, from the outside in, an outer layer, a middle layer, and an inner layer. The outer layer includes a heat shielding layer and a knitted layer, with the knitted layer covering the outside of the heat shielding layer. The heat shielding layer is knitted from heat shielding filaments and cotton yarn, with sun-protecting and heat-shielding factors attached to the outside of the heat shielding filaments. The knitted layer is knitted from a combination of profiled cross-section filaments and spandex fibers, with the profiled cross-section filaments covering 65% of the outer layer. The middle layer is knitted from blended yarn, which is composed of the following raw materials in parts by weight: 60 parts elastic polyester fiber and 30 parts hollow fiber. The inner layer is knitted from antibacterial fibers and fluffy yarn, with the fluffy yarn covering 65% of the inner layer. The preparation process of the antibacterial fiber is as follows:

[0040] 1) At 92℃, bentonite and dilute nitric acid solution are mixed to prepare the first mixture;

[0041] 2) At 58°C, the first mixture in 1) is mixed with water to prepare the second mixture;

[0042] 3) Mix the second mixture from 2), sodium dodecylbenzenesulfonate, and amino acids to prepare a third mixture;

[0043] 4) Under pH 7.2 conditions, the third mixture in 3) is reacted with zinc sulfate to produce zinc-loaded bentonite;

[0044] 5) At 26°C, zinc-loaded bentonite, anhydrous ethanol and coupling agent are mixed to prepare a fourth mixture, and then the fourth mixture is brushed onto viscose fiber to make antibacterial fiber.

[0045] The amino acid is made by mixing glycine and valine, and the mixing ratio of glycine and valine is 20 parts glycine and 30 parts valine. The coupling agent is a coupling agent with the brand name KH-560.

[0046] In step 1): the concentration of nitric acid in the dilute nitric acid solution is 1.5 mol / L, and the amount of the dilute nitric acid solution used is 36 parts by weight relative to 1 part by weight of the bentonite.

[0047] The amount of sodium dodecylbenzenesulfonate and the amount of amino acid are 9 parts by weight relative to 100 parts by weight of the second mixture.

[0048] The amount of zinc sulfate used is 7 parts by weight relative to 100 parts by weight of the third mixture.

[0049] The amount of anhydrous ethanol used is 24 parts by weight relative to 1 part by weight of antibacterial fiber, and the amount of coupling agent used is 2.4 parts by weight.

[0050] The amount of water used is 130 parts by weight relative to 100 parts by weight of the first mixture.

[0051] The weaving steps for the braided layer are as follows:

[0052] ①. Stitch arrangement: Use high-foot and low-foot needles alternately in a row, with four rows forming a cycle, i.e., ABAB; in rows 1 and 2, B needles are used for floating yarn, and A needles are used for floating yarn; in rows 3 and 4, B needles are used for loops, and A needles are used for floating yarn.

[0053] ②. Yarn threading and weaving: The first and third threads thread spandex fibers, and the second and fourth threads thread filaments with irregular cross sections. After the yarn threading is completed, weaving is carried out.

[0054] The irregularly shaped cross-section filament is selected from cross-sections.

[0055] A method for preparing a multifunctional knitted fabric with sun protection and heat shielding includes the following steps:

[0056] S1. Using polylactic acid yarn as raw material, the basic fabric is woven using weft knitting technology according to the structure of outer layer, middle layer and inner layer;

[0057] S2. Pre-design the base fabric;

[0058] S3. Dye the base fabric that has undergone the pre-forming process in S2.

[0059] S4. After dyeing, the base fabric undergoes dehydration, drying, wrinkle-resistant treatment, softening, and shaping to become a multifunctional knitted fabric.

[0060] like Figure 1 The diagram shows the heat insulation performance of the knitted fabric produced according to the method in the first embodiment of the present invention.

[0061] In a second embodiment, the present invention provides a technical solution: a multifunctional knitted fabric with sun protection and heat shielding, comprising, from the outside in, an outer layer, a middle layer, and an inner layer. The outer layer includes a heat shielding layer and a woven layer, with the woven layer covering the outside of the heat shielding layer. The heat shielding layer is woven from heat shielding filaments and cotton yarn, with sun-protective and heat-shielding factors attached to the outside of the heat shielding filaments. The woven layer is woven from a combination of profiled cross-section filaments and spandex fibers, with the profiled cross-section filaments having a coverage rate of 68% in the outer layer. The middle layer is woven from blended yarn, which is composed of the following raw materials in parts by weight: 63 parts elastic polyester fiber and 28 parts hollow fiber. The inner layer is woven from antibacterial fibers and fluffy yarn, with the fluffy yarn having a coverage rate of 68% in the inner layer. The preparation process of the antibacterial fiber is as follows:

[0062] 1) At 94℃, bentonite and dilute nitric acid solution are mixed to prepare the first mixture;

[0063] 2) At 59°C, the first mixture in 1) is mixed with water to prepare the second mixture;

[0064] 3) Mix the second mixture from 2), sodium dodecylbenzenesulfonate, and amino acids to prepare a third mixture;

[0065] 4) Under pH 7.1 conditions, the third mixture in 3) is reacted with zinc sulfate to produce zinc-loaded bentonite;

[0066] 5) At 20°C, zinc-loaded bentonite, anhydrous ethanol and coupling agent are mixed to prepare a fourth mixture, and then the fourth mixture is brushed onto viscose fiber to make antibacterial fiber.

[0067] The amino acid is made by mixing glycine and valine, and the mixing ratio of glycine and valine is 20 parts glycine and 30 parts valine. The coupling agent is a coupling agent with the brand name KH-560.

[0068] In step 1): the concentration of nitric acid in the dilute nitric acid solution is 1.6 mol / L, and the amount of the dilute nitric acid solution used is 38 parts by weight relative to 1 part by weight of the bentonite.

[0069] The amount of sodium dodecylbenzenesulfonate and the amount of amino acid are 7 parts by weight relative to 100 parts by weight of the second mixture.

[0070] The amount of zinc sulfate used is 6 parts by weight relative to 100 parts by weight of the third mixture.

[0071] The amount of anhydrous ethanol used is 22 parts by weight relative to 1 part by weight of antibacterial fiber, and the amount of coupling agent used is 2.2 parts by weight.

[0072] The amount of water used is 110 parts by weight relative to 100 parts by weight of the first mixture.

[0073] The weaving steps for the braided layer are as follows:

[0074] ①. Stitch arrangement: Use high-foot and low-foot needles alternately in a row, with four rows forming a cycle, i.e., ABAB; in rows 1 and 2, B needles are used for floating yarn, and A needles are used for floating yarn; in rows 3 and 4, B needles are used for loops, and A needles are used for floating yarn.

[0075] ②. Yarn threading and weaving: The first and third threads thread spandex fibers, and the second and fourth threads thread filaments with irregular cross sections. After the yarn threading is completed, weaving is carried out.

[0076] The irregularly shaped cross-section filament is selected from cross-sections.

[0077] A method for preparing a multifunctional knitted fabric with sun protection and heat shielding includes the following steps:

[0078] S1. Using polylactic acid yarn as raw material, the basic fabric is woven using weft knitting technology according to the structure of outer layer, middle layer and inner layer;

[0079] S2. Pre-design the base fabric;

[0080] S3. Dye the base fabric that has undergone the pre-forming process in S2.

[0081] S4. After dyeing, the base fabric undergoes dehydration, drying, wrinkle-resistant treatment, softening, and shaping to become a multifunctional knitted fabric.

[0082] like Figure 2 The diagram shows the heat insulation performance of the knitted fabric produced according to the method in the second embodiment of the present invention.

[0083] In the third embodiment, the present invention provides a technical solution: a multifunctional knitted fabric with sun protection and heat shielding, comprising, from the outside in, an outer layer, a middle layer, and an inner layer. The outer layer includes a heat shielding layer and a woven layer. The woven layer covers the outside of the heat shielding layer. The heat shielding layer is woven from heat shielding filaments and cotton yarn. Sun protection and heat shielding factors are attached to the outside of the heat shielding filaments. The woven layer is woven from a combination of profiled cross-section filaments and spandex fibers. The profiled cross-section filaments have a coverage rate of 75% in the outer layer. The middle layer is woven from blended yarn, which is composed of the following raw materials in parts by weight: 70 parts elastic polyester fiber and 30 parts hollow fiber. The inner layer is woven from antibacterial fibers and fluffy yarn. The fluffy yarn has a coverage rate of 70% in the inner layer. The preparation process of the antibacterial fiber is as follows:

[0084] 1) At 95℃, bentonite and dilute nitric acid solution are mixed to prepare the first mixture;

[0085] 2) At 65°C, the first mixture in step 1) is mixed with water to prepare the second mixture;

[0086] 3) Mix the second mixture from 2), sodium dodecylbenzenesulfonate, and amino acids to prepare a third mixture;

[0087] 4) Under pH 7.5 conditions, the third mixture in 3) is reacted with zinc sulfate to produce zinc-loaded bentonite;

[0088] 5) At 30°C, zinc-loaded bentonite, anhydrous ethanol and coupling agent are mixed to prepare a fourth mixture, and then the fourth mixture is brushed onto viscose fiber to prepare antibacterial fiber.

[0089] The amino acid is made by mixing glycine and valine, and the mixing ratio of glycine and valine is 20 parts glycine and 30 parts valine. The coupling agent is a coupling agent with the brand name KH-560.

[0090] In step 1): the concentration of nitric acid in the dilute nitric acid solution is 1.7 mol / L, and the amount of the dilute nitric acid solution used is 40 parts by weight relative to 1 part by weight of the bentonite.

[0091] The amount of sodium dodecylbenzenesulfonate and the amount of amino acid are 12 parts by weight relative to 100 parts by weight of the second mixture.

[0092] The amount of zinc sulfate used is 8 parts by weight relative to 100 parts by weight of the third mixture.

[0093] The amount of anhydrous ethanol used is 25 parts by weight relative to 1 part by weight of antibacterial fiber, and the amount of coupling agent used is 2.5 parts by weight.

[0094] The amount of water used is 140 parts by weight relative to 100 parts by weight of the first mixture.

[0095] The weaving steps for the braided layer are as follows:

[0096] ①. Stitch arrangement: Use high-foot and low-foot needles alternately in a row, with four rows forming a cycle, i.e., ABAB; in rows 1 and 2, B needles are used for floating yarn, and A needles are used for floating yarn; in rows 3 and 4, B needles are used for loops, and A needles are used for floating yarn.

[0097] ②. Yarn threading and weaving: The first and third threads thread spandex fibers, and the second and fourth threads thread filaments with irregular cross sections. After the yarn threading is completed, weaving is carried out.

[0098] The irregularly shaped cross-section filament is selected from cross-sections.

[0099] A method for preparing a multifunctional knitted fabric with sun protection and heat shielding includes the following steps:

[0100] S1. Using polylactic acid yarn as raw material, the basic fabric is woven using weft knitting technology according to the structure of outer layer, middle layer and inner layer;

[0101] S2. Pre-design the base fabric;

[0102] S3. Dye the base fabric that has undergone the pre-forming process in S2.

[0103] S4. After dyeing, the base fabric undergoes dehydration, drying, wrinkle-resistant treatment, softening, and shaping to become a multifunctional knitted fabric.

[0104] like Figure 3The diagram shows the heat insulation performance of the knitted fabric produced according to the method in the third embodiment of the present invention.

[0105] Comparative Example: A knitted fabric was prepared according to the method of the first embodiment, the difference being that the outer layer did not use heat-shielding filaments, but was made of ordinary cotton yarn, and the middle layer did not use elastic polyester fibers and hollow fibers, but was also made of ordinary cotton yarn. For specific properties, see [link to relevant documentation]. Figures 1-3 .

[0106] As can be seen from the comparison of the above embodiments and comparative examples, the knitted fabric provided by the present invention has excellent sun protection and heat-blocking functions, and also has good antibacterial and moisture-absorbing capabilities.

[0107] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A multifunctional knitted fabric with sun protection and heat shielding properties, characterized in that: The structure comprises, from the outside in, an outer layer, a middle layer, and an inner layer. The outer layer includes a heat-shielding layer and a braided layer. The braided layer covers the outside of the heat-shielding layer and is woven from heat-shielding filaments and cotton yarn. Sunscreen and heat-shielding agents are attached to the outside of the heat-shielding filaments. The braided layer is woven from a combination of profiled cross-section filaments and spandex fibers. The profiled cross-section filaments cover 50%-75% of the outer layer. The middle layer is woven from blended yarn, which is composed of the following raw materials in parts by weight: 50-70 parts elastic polyester fiber and 20-35 parts hollow fiber. The inner layer is woven from antibacterial fibers and fluffy yarn. The fluffy yarn covers 60%-70% of the inner layer. The preparation process of the antibacterial fiber is as follows: 1) At 90-95℃, bentonite and dilute nitric acid solution are mixed to prepare the first mixture; 2) At 55-65℃, the first mixture in 1) is mixed with water to prepare the second mixture; 3) Mix the second mixture from 2), sodium dodecylbenzenesulfonate, and amino acids to prepare a third mixture; 4) Under conditions of pH 7-7.5, the third mixture in 3) is reacted with zinc sulfate to produce zinc-loaded bentonite; 5) At 15-30℃, zinc-loaded bentonite, anhydrous ethanol and coupling agent are mixed to prepare a fourth mixture, and then the fourth mixture is brushed onto viscose fiber to make antibacterial fiber.

2. The multifunctional knitted fabric with sun protection and heat shielding as described in claim 1, characterized in that: The amino acid is made by mixing glycine and valine, and the mixing ratio of glycine and valine is 20 parts glycine and 30 parts valine. The coupling agent is a coupling agent with the brand name KH-560.

3. The multifunctional knitted fabric with sun protection and heat shielding as described in claim 1, characterized in that: In step 1): the concentration of nitric acid in the dilute nitric acid solution is 1.4 mol / L-1.7 mol / L, and the amount of the dilute nitric acid solution used is 30-40 parts by weight relative to 1 part by weight of the bentonite.

4. The multifunctional knitted fabric with sun protection and heat shielding as described in claim 1, characterized in that: The amount of sodium dodecylbenzenesulfonate and the amount of amino acids are 6-12 parts by weight relative to 100 parts by weight of the second mixture.

5. The multifunctional knitted fabric with sun protection and heat shielding as described in claim 1, characterized in that: The amount of zinc sulfate used is 6-8 parts by weight relative to 100 parts by weight of the third mixture.

6. The multifunctional knitted fabric with sun protection and heat shielding as described in claim 1, characterized in that: The amount of anhydrous ethanol used is 20-25 parts by weight relative to 1 part by weight of antibacterial fiber, and the amount of coupling agent used is 2-2.5 parts by weight.

7. The multifunctional knitted fabric with sun protection and heat shielding as described in claim 1, characterized in that: The amount of water used is 100-140 parts by weight relative to 100 parts by weight of the first mixture.

8. The multifunctional knitted fabric with sun protection and heat shielding as described in claim 1, characterized in that: The weaving steps for the braided layer are as follows: ①. Stitch arrangement: Use high-foot and low-foot needles alternately in a row, with four rows forming a cycle, i.e., ABAB; in rows 1 and 2, B needles are used for floating yarn, and A needles are used for floating yarn; in rows 3 and 4, B needles are used for loops, and A needles are used for floating yarn. ②. Yarn threading and weaving: The first and third threads thread spandex fibers, and the second and fourth threads thread filaments with irregular cross sections. After the yarn threading is completed, weaving is carried out.

9. The multifunctional knitted fabric with sun protection and heat shielding as described in claim 1, characterized in that: The irregularly shaped cross-section filaments are selected from one of the following: circular cross-section, cross-section, or flat cross-section.

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