Cool color master batch gradient blended spinning and preparation method thereof

Abstract

The invention relates to the technical field of spinning preparation, and discloses cool color master batch gradient blended spinning and a preparation method thereof.The preparation method comprises the steps that the proportion of cool master batches and color master batches is obtained, and the cool master batches and the color master batches are prepared; the preparation method comprises the following steps: performing nano coating treatment on a cool master batch and a color master batch to obtain an optimal synergistic ratio of the cool master batch and the color master batch, dynamically adjusting a blending ratio and a process path, performing programming regulation and control on a cool degree and color shade to execute a partitioned melting and mixing strategy, and performing staged functional component mixing; a gradient color distribution strategy is executed, material distribution in the fibers is adjusted, annular airflow is adopted for cooling, the cooling speed and the cooling flow direction are controlled, and the melt is rapidly shaped; comparing the actual parameters of the generated fiber structure with the target performance demand parameters, and judging whether the color distribution uniformity, the cool feeling performance index and the structural integrity meet preset standards or not; according to the scheme, the diversified requirements of the market for cool feeling and color can be better met.

Description

Technical Field

[0001] The invention relates to the technical field of spinning preparation, and in particular to a method for preparing cool-feeling colored masterbatch gradient blending spinning. Background Art

[0002] The textile industry is experiencing a growing demand for functional fibers, particularly those with cooling properties. Cooling fibers are primarily achieved through the addition of cooling agents or specialized cross-sectional shapes, while colored fibers are achieved through dyeing or the addition of color masterbatches. By combining specialized cooling and coloring masterbatches, cooling fibers not only effectively reduce skin surface temperature and enhance wearing comfort, but also meet consumer demand for diverse and aesthetically pleasing fiber colors. These fibers are widely used in sportswear, underwear, and summer clothing, and hold promising market prospects.

[0003] However, existing technologies for achieving a synergistic effect of cooling sensation and color face technical bottlenecks. Cooling agents and color masterbatches lack compatibility, which can easily lead to unstable fiber performance or uneven color. Furthermore, while the development of shaped polyester filaments can improve the fiber's moisture wicking properties, the integration of cooling and color functions remains immature. Furthermore, existing technologies are also unable to achieve a gradient distribution of color and cooling agents within the fiber, making it difficult to meet the market's dual demands for personalization and performance. The market urgently needs a multifunctional fiber that can simultaneously meet the requirements of cooling sensation, color, and a shaped cross-section.

[0004] This solution improves the fiber's cooling intensity and color uniformity, while also achieving a gradient distribution of internal materials, ultimately creating a high-performance fiber structure with a color gradient effect. Through these technological innovations, this solution can better meet the market's diverse demands for cooling sensations and colors, bringing new business opportunities and development directions to the textile industry. Summary of the Invention

[0005] The present invention provides a method for preparing cool colored masterbatch by gradient blending and spinning, which is used to promote the solution of the problems mentioned in the above background technology.

[0006] In the first aspect, the present application provides a gradient blended spinning of a cool colored masterbatch, adopting the following technical solution: a gradient blended spinning of a cool colored masterbatch, comprising: 70-80 parts of polyester base material, 10-20 parts of cooling masterbatch, 5-10 parts of color masterbatch, and 0.5-1 part of nano-coating material; wherein, the cooling masterbatch is composed of the following components in parts by weight: 5-15 parts of cooling agent, 80-90 parts of polyester carrier resin, and 1-5 parts of modified polymer dispersant; the color masterbatch is composed of the following components in parts by weight: 1-5 parts of organic pigment, 85-90 parts of polyester carrier resin, and 1-5 parts of modified polymer dispersant; the coating layer thickness of the nano-coating material is 0.1-0.3 μm, and polyethylene material is used to improve the thermal shielding performance of the cooling masterbatch and the color masterbatch and the distribution stability and uniformity in the fiber.

[0007] In a second aspect, the present application provides a method for preparing cool-feeling colored masterbatch gradient blending spinning, which adopts the following technical solution: A method for preparing cool-feeling colored masterbatch gradient blending spinning, comprising: S1, take the cooling masterbatch and the color masterbatch ratio, prepare the cooling masterbatch and the color masterbatch; The cooling masterbatch and color masterbatch are nano-coated to obtain the raw material parameters of the composite fiber and polyester substrate information with layered embedding ability; Obtain the optimal synergistic ratio of cooling masterbatch and color masterbatch, initialize compatible parameters, and perform fine mixing; S2. Set target performance requirement parameters, dynamically adjust the blending ratio and process path, and programmatically control the cooling sensation and color intensity; S3, using a two-stage blending screw, implementing a zoned melt mixing strategy, and controlling the parameters of the heating and pressure zones of each section of the two-stage screw; S4. According to the compatibility of the cooling masterbatch and the color masterbatch at different melting temperatures, the cooling masterbatch and the color masterbatch are gradually integrated to mix the functional components in stages; S5. Executing a gradient color distribution strategy based on gradient blending control parameters to adjust the material distribution inside the fiber and generate a fiber structure with a color gradient effect; S6. Obtaining preset special-shaped spinneret structural parameters, extruding the melt, and forming a fiber prototype structure with a heterogeneous interface; Adopting annular airflow for cooling, controlling the cooling speed and direction, and quickly shaping the melt; S7. Compare the actual parameters of the generated fiber structure with the target performance requirement parameters to determine whether the color distribution uniformity, cooling performance index and structural integrity meet the preset standards.

[0008] Through the above technical solutions, through precise proportioning and dynamic regulation, the coordinated optimization of cooling feeling and color performance is achieved; the zoned melting and gradient blending technology is adopted to make the fiber have gradient color and highly stable cooling feeling; the special-shaped fiber structure enhances comfort and functionality, and improves the overall spinning quality and application performance.

[0009] Preferably, the nano-coating treatment of the cooling masterbatch and the color masterbatch to obtain composite fiber raw material parameters and polyester substrate information with layered embedding ability includes: Obtaining a preparation ratio of a cooling masterbatch and a color masterbatch, comprising 5-15 parts of a cooling agent, 80-90 parts of a polyester carrier resin, and 1-5 parts of a modified polymer dispersant; A cooling agent, a carrier resin and a dispersant are used to prepare a cooling masterbatch according to the preparation ratio of the cooling masterbatch; Using pigment, carrier resin and dispersant, the masterbatch is prepared according to the preparation ratio of the masterbatch; Obtain information about the polymer coating material for nanocoating treatment, including its compatibility, melting point, dispersibility, and rheological properties at the target temperature; Set the coating order and separation interface structure of cooling masterbatch and color masterbatch; The coating material is evenly covered on the surface of the cooling masterbatch and the color masterbatch in an atomized manner to form a nano-scale heat shield; According to the functional requirements of cooling masterbatch and color masterbatch, the best synergistic ratio is determined. Usually, cooling masterbatch accounts for 15 parts and color masterbatch accounts for 8 parts. The coated cooling masterbatch and color masterbatch are input into the multi-stage mixing system according to the optimal synergistic ratio for low-shear fine mixing operation.

[0010] Preferably, the setting of target performance requirement parameters, dynamic adjustment of blending ratio and process path, and programmatic regulation of cooling sensation and color intensity include: Setting target performance requirements, including fiber cooling intensity, color depth, and structural integrity; Dynamically adjust the ratio of cooling masterbatch and color masterbatch according to target performance requirement parameters; Control the intensity of the cooling sensation by adjusting the ratio and particle size of the cooling masterbatch, select different types of masterbatch and adjust the amount of masterbatch added to achieve the desired color concentration; Set different blending process paths and monitor process parameters such as temperature, pressure and flow rate in real time; By programming and controlling these process parameters, the blending process can be dynamically adjusted.

[0011] The above technical solution, by determining the ratio of cooling masterbatch and color masterbatch and then performing a nano-coating treatment, can effectively improve the performance of composite fiber raw materials. By optimizing the preparation ratio of the masterbatch, the compatibility of material properties is ensured, the overall performance of the final fiber is improved. By setting target performance requirements and dynamically adjusting the blending ratio and process path, precise control of the cooling effect and color intensity can be achieved. This programmable control method makes the production process more flexible and efficient, providing a reliable guarantee for the production of high-quality cooling colored fibers.

[0012] Preferably, the two-stage blending screw is used to implement a zoned melt mixing strategy, and the parameters of the heating zone and pressure zone of each section of the two-stage screw are controlled, including: Drying treatment: Dry the cooling masterbatch, color masterbatch and polyester substrate to make the moisture content less than 0.1%; Initialize the temperature setting of the two-stage blending screw: the feed zone temperature is controlled at 180°C to ensure that the polyester substrate begins to soften when entering the screw system; Through the above technical solution, the temperature of the feeding zone is controlled at 200°C, which is used to thermoplastically soften the polyester substrate; The temperature of the initial mixing zone is controlled at 220°C. At this time, the cooling masterbatch is introduced and low shear mixing is performed to ensure that the cooling masterbatch is evenly dispersed in the substrate. The temperature of the deep mixing zone is controlled at 240°C, and the shear frequency is increased to a medium level of 1000 rpm to promote deep dispersion and initial fusion of the cooling masterbatch; The temperature of the masterbatch introduction zone is controlled at 250°C, the masterbatch is introduced in sections, and the pressure is gradually increased to 25 MPa to enter the high shear fusion stage; The temperature of the homogenization zone is controlled at 260°C. In this zone, the masterbatch, the fused cooling masterbatch and the polyester base material are completely fused to form a uniform melt. The gradient control zone is controlled at 270°C, and the hierarchical construction of functional components is achieved by adjusting the screw structure; The output zone maintains a constant temperature of 280°C, performs terminal homogenization and melt delivery preparation to ensure stable output of the melt, and completes pressure equalization processing to ensure the quality and stability of the fiber.

[0013] Preferably, the method of executing a gradient color distribution strategy according to the gradient blending control parameters, adjusting the material distribution inside the fiber, and generating a fiber structure with a color gradient effect includes: Set the screw speed and feed rate according to the spinning speed and output requirements of the target fiber; Maintain a uniform screw speed and dynamically adjust the feed rate to ensure a gradual distribution of the masterbatch in the melt; After being heated and blended, the melt enters the spinning die and then enters the cooling section for fine cooling control to reduce the temperature to the set value. The gradient change of the cooling rate is set, and the rate is gradually adjusted according to demand to make the color transition between the outer layer and the inner layer smooth. Through the above technical solution, by adjusting the temperature of the cooling section and the flow rate of the cooling medium, it is ensured that the temperature of the outer layer melt drops quickly to a lower value during the cooling process, while the temperature of the inner layer slowly drops to below the required temperature, ensuring that the color layers are uniform and the transition is natural.

[0014] The above technical solution, through the use of a two-stage blending screw and a zoned melt mixing strategy, enables effective temperature and pressure control, thereby optimizing the parameter settings of each stage of the process. This method improves the mixing efficiency of the cooling masterbatch and the color masterbatch, ensuring high uniformity and stability of the melt. In addition, the zone control function enables different functional components to be more efficiently integrated at an appropriate temperature, providing a guarantee for improving the final fiber performance. By implementing a gradient color distribution strategy, the material distribution within the fiber can be effectively adjusted, generating a fiber structure with a color gradient effect.

[0015] Preferably, the cooling is performed by adopting annular airflow, controlling the cooling speed and flow direction, and quickly shaping the blended material, including: After the material is heated, it is pushed to the spinneret through the extrusion head and the melt is extruded through the special-shaped spinneret holes; According to the design of the spinneret and the structure of the spinneret hole, a fiber prototype with anisotropic interface is formed; The melt deforms due to shear force and temperature difference, forming a multi-layered structure; Adopting annular airflow cooling method, the airflow surrounds the fiber surface for uniform cooling; The cooling airflow flows around the fiber surface through the annular pipe. The direction of the airflow is perpendicular or oblique to the stretching direction of the fiber, so that the airflow can effectively cover the fiber surface and interior. Control the flow rate and temperature of the annular airflow, set the airflow from the outside of the fiber to the inside, surrounding the entire fiber for convection cooling; quickly shape the fiber structure with anisotropic interfaces.

[0016] This innovative technical solution, utilizing a pre-configured spinneret structure for extrusion, enhances the fiber's physical properties and allows the melt to quickly solidify during cooling. The use of annular airflow not only ensures uniform cooling but also optimizes the fiber's overall structural stability. This cooling method effectively improves production efficiency, reduces defects during production, and ensures high-quality fiber products.

[0017] Preferably, the comparing of the actual parameters of the generated fiber structure with the target performance requirement parameters to determine whether the color distribution uniformity, the cooling performance index and the structural integrity meet the preset standards includes: Obtaining actual parameters of the generated fiber structure and comparing the actual parameters with target performance requirement parameters; The cooling intensity, color concentration and structural integrity of the generated fibers were compared and analyzed; If the color distribution is uneven, find out the specific cause and adjust the temperature gradient of the cooling section, the cooling rate, or the ratio of the color masterbatch to the cooling masterbatch to ensure uniform color distribution; If the cooling intensity does not meet the target requirement, check the distribution of the cooling masterbatch, adjust the amount of masterbatch added, improve the blending efficiency, and optimize the spinning temperature and cooling process to gradually improve the cooling intensity; If the tensile strength of the fiber does not meet expectations, adjust the raw material ratio, optimize the base material selection, and improve the spinning and stretching processes to ensure the stability and toughness of the fiber structure.

[0018] By comparing the actual parameters of the generated fiber structure with the target performance parameters, this technical solution can effectively determine whether color distribution uniformity, cooling performance indicators, and structural integrity meet preset standards. This process provides a scientific basis for quality control, helping to identify problems and make adjustments in a timely manner.

[0019] The present invention has the following beneficial effects: 1. This method for preparing cooling colored masterbatch gradient blended spinning can achieve precise control of the fiber's cooling properties and color distribution. This method nano-coates the cooling masterbatch and color masterbatch, ensuring good dispersion and stability during the spinning process, avoiding agglomeration and ensuring uniform fiber color and cooling effect. A two-stage blending screw and a zoned melt mixing strategy are used to effectively control the temperature and pressure during the melt mixing process, ensuring the full integration of the cooling masterbatch and color masterbatch with the polyester substrate, thereby improving the overall performance of the fiber.

[0020] 2. This method utilizes gradient blending and spinning to produce cooling colored masterbatch. By employing gradient blending control parameters and a gradient color distribution strategy, it can generate a fiber structure with a color gradient effect, endowing the product with a unique aesthetic and design. The application of annular airflow cooling technology enables rapid shaping of the melt, ensuring the integrity of the fiber structure and dimensional stability. Furthermore, precise control of the cooling rate and flow direction optimizes the material distribution within the fiber, further enhancing the product's cooling effect and color vividness.

[0021] 3. This method for preparing cool colored masterbatch gradient blended spinning can promptly discover and solve problems arising in the production process by comparing and analyzing the actual parameters of the generated fiber structure and the target performance requirement parameters, thereby ensuring the stability and reliability of product quality. This closed-loop feedback mechanism helps to optimize process parameters, improve production efficiency, and reduce production costs. Through a comprehensive evaluation of color distribution uniformity, cool performance indicators, and structural integrity, it can be ensured that the product meets the preset standards and improves consumer satisfaction. This method for preparing cool colored masterbatch gradient blended spinning has the advantages of stable process, controllable product quality, and high added value, providing new ideas and technical support for the development of the textile industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1: Standard cool feeling fiber, refer to Figure 1 The present embodiment provides a method for preparing a cool colored masterbatch gradient blended spinning, which is prepared from the following components by weight: The cooling masterbatch gradient blended spun fiber of this embodiment is prepared from the following ingredients by weight: 74g of polyester base material, 15g of cooling masterbatch, 8g of color masterbatch, and 1g of nano-coating material. The cooling masterbatch is composed of 1.8g of cooling agent, 12.75g of polyester carrier resin, and 0.45g of modified polymer dispersant; the color masterbatch is composed of 0.4g of phthalocyanine blue organic pigment, 7.04g of polyester carrier resin, and 0.56g of modified polymer dispersant; and the nano-coating material is polyethylene, with a coating layer thickness of 0.2μm.

[0025] Preparation method of cooling masterbatch: Mix 1.8g of natural quartz powder and 0.45g of modified polymer dispersant (polyester grafted maleic anhydride) evenly, stir at 2000rpm in a high-speed disperser for 20 minutes, then slowly add 12.75g of molten polyester resin, and extrude and granulate at 180°C to obtain a cooling masterbatch.

[0026] Masterbatch preparation method: After uniformly mixing 0.4 g of phthalocyanine blue organic pigment and 0.56 g of modified polymer dispersant, 7.04 g of molten polyester was added, and the mixture was blended and granulated at 170° C.-180° C. by a twin-screw extruder. After cooling, the mixture was pelletized to obtain a masterbatch.

[0027] Spinning preparation method: Step a: The prepared cooling masterbatch and color masterbatch are subjected to nano-coating treatment by using spray polyethylene coating technology to control the thickness to be 0.2 μm.

[0028] Step b: Mix with polyester base material in proportion, import the programming system to set the target coolness value and color concentration, and make dynamic ratio adjustments.

[0029] Step c: melt mixing was performed using a two-stage blending screw, with the heating section temperatures set at 220° C., 240° C., and 265° C., respectively, and the pressure controlled at 10 MPa.

[0030] Step d: Extruding the melt through a Y-shaped spinneret to form a functional composite fiber structure.

[0031] Step e: Use annular high-speed airflow for cooling and shaping, with the wind speed set at 9m / s, and finally test the cooling performance, color uniformity and mechanical integrity of the fiber.

[0032] Example 2: Highly cool enhanced fiber, a cool colored masterbatch gradient blending spinning preparation method of this embodiment is prepared from the following components by weight: 70g polyester base material, 20g cooling masterbatch, 8.5g color masterbatch, 1g nano-coating material. The cooling masterbatch is composed of 3g cooling agent (high thermal conductivity muscovite), 16.5g polyester carrier resin, and 0.5g modified polymer dispersant; the color masterbatch is composed of 0.6g high hiding yellow pigment, 7.4g polyester carrier resin, and 0.5g modified polymer dispersant; the nano-coating material is polyethylene, with a coating thickness of 0.3μm.

[0033] Preparation method of cooling masterbatch: 3g of high thermal conductivity muscovite powder and 0.5g of polyester-based modified dispersant were pre-dispersed in a solvent for 10 minutes, and then 16.5g of molten polyester resin was added and extruded and granulated at 185℃-200℃ to obtain a cooling masterbatch.

[0034] Masterbatch preparation method: 0.6 g of high hiding organic yellow pigment was mixed with 0.5 g of modified dispersant, stirred at 2000 rpm, 7.4 g of molten polyester resin was added, and the mixture was blended, extruded and granulated at 175° C. to obtain a masterbatch.

[0035] Spinning preparation method: Step a: The prepared masterbatches are respectively subjected to polyethylene nano-coating to improve thermal stability and distribution uniformity.

[0036] Step b: According to the set cooling value and color concentration requirements, the blending ratio is adjusted through the batching system.

[0037] Step c: a two-stage blending extrusion system was used, with the temperature of the front section set at 230° C., the middle section set at 245° C., the final section set at 265° C., and the pressure set at 12 MPa.

[0038] Step d: Extruded through an "X-shaped" special-shaped spinneret, the fiber cross section has a multifunctional area distribution.

[0039] Step e: Use 7.5m / s cold air to set the shape, and after the silk is obtained, test its thermal conductivity, color difference index, and strength and elongation properties, all of which meet the use requirements.

[0040] Example 3: Light-colored soft-feel fiber. This example describes a method for preparing a cool-feeling colored masterbatch gradient blended spinning. The fiber is prepared from the following components by weight: 78g polyester substrate, 10g cooling masterbatch, 6g color masterbatch, and 0.5g nano-coating material. The cooling masterbatch is composed of 1g cooling agent (bornyl mineral), 8.5g polyester carrier resin, and 0.5g modified polymer dispersant; the color masterbatch is composed of 0.3g pink organic pigment, 5.2g polyester carrier resin, and 0.5g modified polymer dispersant; and the nano-coating material is polyethylene, with a coating thickness of 0.1μm.

[0041] Preparation method of cooling masterbatch: 1g of borneol mineral powder was dispersed in an alcohol solution, 0.5g of a modified dispersant was added, 8.5g of a molten polyester resin was added under low temperature conditions and blended at a low speed, and pelletized after cooling to obtain a cooling masterbatch.

[0042] Masterbatch preparation method: 0.3 g of pink pigment and 0.5 g of modified dispersant were premixed, and then 5.2 g of polyester resin was added. The mixture was blended and granulated at a temperature of 180° C. to obtain a masterbatch.

[0043] Spinning preparation method: Step a: The masterbatch is coated with a thin layer of polyethylene using a micron coating device, and the coating thickness is controlled at 0.1 μm.

[0044] Step b: premixing with polyester substrate at low temperature, setting the starting temperature of blending to 210°C and the end temperature to 250°C.

[0045] Step c: A staged feeding method is used in the blending screw to ensure that the color particles are distributed first, and then the cooling masterbatch is gradually introduced.

[0046] Step d: using a fish-scale spinneret structure for extrusion to form a micro-layer composite fiber structure.

[0047] Step e: The cooling rate is controlled to 6m / s through a water cooling + air cooling combined cooling system, and the softness, surface coolness, temperature drop and color distribution effect are finally tested, and the performance is excellent.

[0048] Comparative Example 1 The difference between this comparative example and Example 1 is that the standard comparative sample without nano-coating is used; Comparative Example 2 The difference between this comparative example and Example 1 is that the high cooling type but the masterbatch ratio is unreasonable; Comparative Example 3 The difference between this comparative example and Example 1 is that ordinary masterbatch is used instead of functional masterbatch; Performance Testing The cooling masterbatch and color masterbatch prepared in Examples 1-3 and Comparative Examples 1-3 were used to prepare spinning. After the fibers were generated, the cooling sensation, color gradient effect, final softness, strength and elongation, and mechanical integrity of the fibers were tested using the corresponding test methods. The specific test results are shown in the table below: As can be seen from the above table, the cool feeling colored masterbatch gradient blended yarn prepared by the embodiment of the present invention is superior to the comparative example sample in terms of coolness, color gradient effect, softness, strength and elongation, and mechanical integrity. Comparative Example 1 (standard comparison sample without nanocoating): The lack of nanocoating resulted in poor cooling sensation and color stability. The cooling sensation (2.1°C) and color gradient effect (3.2ΔE) were inferior to those of Example 1, but the softness and mechanical strength remained relatively superior. Comparative Example 2 (High Cooling Type but Unreasonable Masterbatch Ratio): The excessively high masterbatch ratio resulted in an increase in cooling sensation (3.0°C), but the color gradient effect (5.8ΔE) was poor. Furthermore, the high masterbatch ratio affected the overall uniformity of the fiber, resulting in a decrease in mechanical properties (tensile strength and mechanical integrity). Comparative Example 3 (using ordinary masterbatch instead of functional masterbatch): Since no cooling agent and color masterbatch were added, the cooling effect of this sample (0.5°C) was extremely poor, the color gradient effect was poor (1.3ΔE), and the softness was high, but the strength and elongation and mechanical integrity were lower than those of the other comparative examples, and the performance was relatively average. Specifically, the cooling sensation of Examples 1, 2, and 3 all reached above 3.3°C, which is much higher than 0.5°C of Comparative Example 3, showing a better cooling effect; in terms of color gradient effect, Example 3 performed best, with a ΔE value of 7.1, and had a stronger sense of color layering, while Comparative Example 3 had almost no color gradient effect, with a ΔE value of only 1.3; in addition, the fiber softness and strength and elongation properties of the examples were also relatively excellent, ensuring the comfort and durability of the fabric.

[0049] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A cool feeling colored masterbatch gradient blending spinning, characterized in that, It is prepared from the following ingredients in parts by weight: 70-80 parts of polyester base material, 10-20 parts of cooling masterbatch, 5-10 parts of color masterbatch, and 0.5-1 part of nano-coating material; wherein, the cooling masterbatch is composed of the following ingredients in parts by weight: 5-15 parts of cooling agent, 80-90 parts of polyester carrier resin, and 1-5 parts of modified polymer dispersant; the color masterbatch is composed of the following ingredients in parts by weight: 1-5 parts of organic pigment, 85-90 parts of polyester carrier resin, and 1-5 parts of modified polymer dispersant; the coating layer of the nano-coating material has a thickness of 0.1-0.3 μm and is made of polyethylene material, which is used to improve the thermal shielding performance of the cooling masterbatch and the color masterbatch and the distribution stability and uniformity in the fiber.

2. The cool feeling colored masterbatch gradient blending spinning according to claim 1, characterized in that: The method for preparing a cool colored masterbatch by gradient blending and spinning comprises the following steps: S1. Obtain the ratio of cooling masterbatch and color masterbatch to prepare cooling masterbatch and color masterbatch; The cooling masterbatch and color masterbatch are nano-coated to obtain the raw material parameters of the composite fiber and polyester substrate information with layered embedding ability; Obtain the optimal synergistic ratio of cooling masterbatch and color masterbatch, initialize compatible parameters, and perform fine mixing; S2. Set target performance requirement parameters, dynamically adjust the blending ratio and process path, and programmatically control the cooling sensation and color intensity; S3, using a two-stage blending screw, implementing a zoned melt mixing strategy, and controlling the parameters of the heating and pressure zones of each section of the two-stage screw; S4. According to the compatibility of the cooling masterbatch and the color masterbatch at different melting temperatures, the cooling masterbatch and the color masterbatch are gradually integrated to mix the functional components in stages; S5. Executing a gradient color distribution strategy based on gradient blending control parameters to adjust the material distribution inside the fiber and generate a fiber structure with a color gradient effect; S6. Obtaining preset special-shaped spinneret structural parameters, extruding the melt, and forming a fiber prototype structure with a heterogeneous interface; Adopting annular airflow for cooling, controlling the cooling speed and direction, and quickly shaping the melt; S7. Compare the actual parameters of the generated fiber structure with the target performance requirement parameters to determine whether the color distribution uniformity, cooling performance index and structural integrity meet the preset standards.

3. The method for preparing a cool colored masterbatch by gradient blending and spinning according to claim 2, characterized in that: The nano-coating treatment of the cooling masterbatch and the color masterbatch to obtain composite fiber raw material parameters and polyester substrate information with layered embedding ability includes: Obtaining a preparation ratio of a cooling masterbatch and a color masterbatch, wherein the preparation ratio includes a cooling agent, a pigment, a carrier resin, and a dispersant; A cooling agent, a carrier resin and a dispersant are used to prepare a cooling masterbatch according to the preparation ratio of the cooling masterbatch; Prepare the masterbatch by using the pigment, carrier resin and dispersant according to the preparation ratio of the masterbatch; Obtaining information about the polymer coating material for nano-coating treatment, the material information including compatibility, melting point, dispersibility, and rheological properties at a target temperature; Setting process parameters for nano-coating treatment, including coating material preheating temperature, spraying path, coating layer thickness range, and masterbatch surface pretreatment method; Set the coating order and separation interface structure of cooling masterbatch and color masterbatch; The coating material is evenly covered on the surface of the cooling masterbatch and the color masterbatch in an atomized manner to form a nano-scale heat shield; Determine the optimal synergistic ratio between cooling masterbatch and color masterbatch based on their functional requirements; The coated cooling masterbatch and color masterbatch are fed into the multi-stage mixing system according to the optimal synergistic ratio for low-shear fine mixing operation; A multi-stage mixing device is used to further regulate the interaction between the cooling masterbatch and the color masterbatch.

4. The method for preparing a cool colored masterbatch by gradient blending and spinning according to claim 3, characterized in that: The target performance requirement parameters are set, the blending ratio and process path are dynamically adjusted, and the cooling sensation and color intensity are programmably controlled, including: Setting target performance requirement parameters, wherein the target performance requirement parameters include cooling intensity, color concentration, and structural integrity of the fiber; Dynamically adjust cooling masterbatch and color masterbatch according to target performance requirement parameters; Adjust the proportion and particle size of the cooling masterbatch to control the cooling intensity, and select different color masterbatches and adjust the amount of color masterbatch added to control the color concentration; Set different blending process paths and monitor process parameters in real time, including temperature, pressure, and flow rate, and dynamically adjust performance requirement parameters through programming.

5. The method for preparing a cool colored masterbatch by gradient blending and spinning according to claim 1, characterized in that: The two-stage blending screw is used to implement a zoned melt mixing strategy to control the parameters of the heating zone and pressure zone of each section of the two-stage screw, including: Dry the cooling masterbatch, color masterbatch and polyester substrate to make the moisture content lower than α; Initialize the temperature setting of the heating zone of the two-stage blending screw and perform primary heating in the feed zone; The temperature of the feeding zone is controlled to C1 to perform thermoplastic softening on the polyester substrate; Control the temperature of the preliminary mixing zone to C2, initially introduce the cooling masterbatch, and perform low shear mixing; Control the temperature of the deep mixing zone to C3, deeply disperse and initially blend the cooling masterbatch, and increase the shear frequency to a medium level; The temperature of the masterbatch introduction zone is controlled at C4, and the masterbatch is introduced in sections while the pressure is increased to B1, and the high shear fusion stage is entered; the temperature of the homogenization zone is controlled at C5, and the masterbatch is fused with the fused cooling masterbatch and the polyester substrate; The temperature of the gradient control zone is controlled to C6, and the screw structure is adjusted to achieve hierarchical construction of functional components; The output area maintains a constant temperature, performs terminal homogenization and melt delivery preparation, maintains a constant temperature output state and completes pressure equalization processing.

6. The method for preparing a cool colored masterbatch by gradient blending and spinning according to claim 5, characterized in that: The method of executing a gradient color distribution strategy based on gradient blending control parameters, adjusting the material distribution inside the fiber, and generating a fiber structure with a color gradient effect includes: Set the screw speed and feed rate according to the spinning speed and output requirements of the target fiber; Maintain a uniform screw speed and dynamically adjust the feed rate to achieve a gradual distribution of the masterbatch in the melt; After being heated and blended, the melt is cooled down to C when it passes through the spinning die and enters the cooling section. w the following; Set the gradient change of cooling rate and gradually adjust the rate according to needs to make the color transition between the outer layer and the inner layer smooth; By adjusting the temperature of the cooling section and the flow rate of the cooling medium, the melt temperature of the outer layer is first reduced to a lower value C during the cooling process. w ; The inner layer temperature needs to slowly drop to the required temperature C w the following.

7. The method for preparing cool colored masterbatch by gradient blending and spinning according to claim 6, characterized in that: The method of using an annular airflow for cooling, controlling the cooling speed and flow direction, and quickly shaping the blended material comprises: After the material is heated, it is pushed to the spinneret through the extrusion head and the melt is extruded through the special-shaped spinneret holes; According to the design of the spinneret and the structure of the spinneret hole, a fiber prototype with anisotropic interface is formed; The melt deforms due to shear force and temperature difference, forming a multi-layered structure; Adopting annular airflow cooling method, the airflow surrounds the fiber surface for uniform cooling; The cooling airflow flows around the fiber surface through the annular pipe. The direction of the airflow is perpendicular or oblique to the stretching direction of the fiber, so that the airflow can effectively cover the fiber surface and interior. Control the flow rate and temperature of the annular airflow, and set the airflow from the outside of the fiber to the inside, surrounding the entire fiber for convection cooling; Rapid shaping of fiber structures with heterogeneous interfaces.

8. The method for preparing cool colored masterbatch by gradient blending and spinning according to claim 4, characterized in that: The comparing of the actual parameters of the generated fiber structure with the target performance requirement parameters to determine whether the color distribution uniformity, the cooling performance index and the structural integrity meet the preset standards includes: obtaining actual parameters of the generated fiber structure, and comparing the actual parameters of the generated fiber structure with target performance requirement parameters; The cooling intensity, color concentration, and structural integrity of the resulting fibers were compared; If the color distribution is uneven, find out the specific cause and adjust the temperature gradient of the cooling section, the cooling rate, or the ratio of the color masterbatch to the cooling masterbatch to make the color distribution uniform; If the cooling intensity does not reach the target intensity, check the distribution of the cooling masterbatch, adjust the addition amount of the masterbatch, improve the blending efficiency, optimize the spinning temperature and cooling process, and increase the cooling intensity in turn; If the tensile strength of the fiber does not meet expectations, adjust the ratio of raw materials, strengthen the selection of base materials, and optimize the spinning and stretching processes to ensure the structural stability and toughness of the fiber.

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