A full-spectrum heat-absorbing composite filling layer for bedding and its preparation method

Abstract

This invention discloses a full-spectrum heat-absorbing composite filling layer for bedding, comprising a high-fiber heat-absorbing layer and a low-thermal-conductivity layer. The high-fiber heat-absorbing layer comprises at least two layers, and the low-thermal-conductivity layer comprises at least one layer, situated between the high-fiber heat-absorbing layers. The high-fiber heat-absorbing layer is in a flocculent form, and the high-fiber heat-absorbing layer and the low-thermal-conductivity layer are bonded together. The high-fiber heat-absorbing layer is prepared by adding 1% to 10% ceramic particles with a particle size between 1 and 100 nm to polyester fibers. The low-thermal-conductivity layer is far-infrared polypropylene fiber. This invention offers advantages such as excellent warmth retention, light weight, superior wind resistance, and good breathability and moisture permeability.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to a full-spectrum heat-absorbing composite filling layer for bedding and its preparation method. Background Technology

[0002] Current filling materials for clothing mainly include two basic categories: natural cotton, wool, silk, and down, as well as synthetic fiber derivatives. The efficiency of heat transfer by an object is called thermal conductivity, measured in watts per meter per degree (W / (m·K)). Objects with higher thermal conductivity transfer heat faster, while those with lower thermal conductivity transfer heat more slowly. Theoretically, materials with low thermal conductivity can be used to make insulation materials.

[0003] For both natural products and synthetic fiber derivatives as filling materials, the main drawbacks are as follows: demanding storage and maintenance conditions, prone to dampness and mold, odor, insect infestation, deformation after washing, slow drying, pinhole fuzzing, heavyness, and poor wind resistance. The main reason is that after processing, the problem of warmth is solved but the problem of heaviness and bulkiness is not solved, the problem of heaviness is solved but the problem of wind resistance is not solved, and the problem of wind resistance is solved but the breathability and moisture permeability are reduced. Breathability and moisture permeability are two important indicators of comfort. If the clothing has poor breathability and moisture permeability, the sweat on the human body surface cannot be easily evaporated, which will make people feel stuffy and uncomfortable. Poor breathability and moisture permeability of bedding will also affect the quality of sleep.

[0004] Therefore, there is an urgent need in the market for a bedding filling material that combines good warmth retention, light weight, excellent wind resistance, and good breathability and moisture permeability. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the present invention aims to provide a full-spectrum heat-absorbing composite filling layer for bedding, thereby resolving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This invention provides a full-spectrum heat-absorbing composite filling layer for clothing, comprising a high-fiber heat-absorbing layer and a low-thermal-conductivity layer. The high-fiber heat-absorbing layer comprises at least two layers, and the low-thermal-conductivity layer comprises at least one layer. The low-thermal-conductivity layer is located between the high-fiber heat-absorbing layers. The high-fiber heat-absorbing layer is in the form of flakes. The high-fiber heat-absorbing layer and the low-thermal-conductivity layer are bonded together. The high-fiber heat-absorbing layer is made by adding 1% to 10% of ceramic particles with a particle size between 1 and 100 nm to polyester fibers. The low-thermal-conductivity layer is far-infrared polypropylene fiber.

[0008] Preferably, the high-fiber heat-absorbing layer has three layers, the low thermal conductivity layer has two layers, and the low thermal conductivity layer is located between each pair of high-fiber heat-absorbing layers.

[0009] Preferably, the nano-ceramic particles are one or both of oxide ceramic particles and carbide ceramic particles.

[0010] Preferably, the oxide ceramic particles are one or more of Al2O3, TiO2, SiO2 and Fe2O3, and the carbide ceramic particles are one or more of SiC, TiC, MoC, ZrC and Cr3C2.

[0011] Preferably, the average pore size of the far-infrared polypropylene fiber is between 2 μm and 3 μm.

[0012] A method for preparing a full-spectrum heat-absorbing composite filling layer for bedding includes the following steps:

[0013] 1) Preparation of high-fiber heat-absorbing layer: Ceramic particles are calcined at 600℃~700℃ for 2.5~3.5 hours, cooled, and ground to particles with a particle size of 1nm~100nm. Polyester chips are dried and melted into polyester melt. The above particles are added in proportion by online addition. The melt is then conveyed to the spinning box by a screw extruder for spinning to produce high-fiber heat-absorbing layer; 2) Layered composite: The high-fiber heat-absorbing layer and the low thermal conductivity layer are composited using a hot melt fiber machine to obtain the finished product.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. The high-fiber heat-absorbing layer of this invention is made by adding 1% to 10% ceramic particles with a particle size between 1-100nm to polyester fibers. As the outer layer, the nano-ceramic particles in the polyester fibers can absorb visible and invisible light from sunlight, efficiently converting radiant energy into heat energy. It has a wide heat source, a large and rapid temperature rise, and excellent heat retention. As the inner layer, it can reflect the heat radiation emitted by the human skin back, further enhancing warmth. The middle low thermal conductivity layer is made of far-infrared polypropylene fiber. The thermal conductivity of far-infrared polypropylene fiber is 0.117W / (m·K), which is lower than that of cotton, wool, and other fiber materials. It can effectively limit heat convection, reduce heat loss, maximize the retention of human body heat, reduce the temperature difference between the two sides of the garment, and play a role in warmth retention. At the same time, it increases wind resistance and has hydrophobic and breathable properties, which can effectively remove moisture emitted by the human body and improve the internal body temperature environment. It can effectively prevent viruses from infecting human skin and has anti-mildew, antibacterial, and washable properties.

[0016] 2. This invention improves warmth retention by combining a high-fiber heat-absorbing layer and a low thermal conductivity layer, while reducing the amount of raw materials used, making the garment lightweight and thin, with a thickness only half that of existing down products, allowing for greater freedom of movement.

[0017] 3. This invention uses a hot melt adhesive fiber low-temperature bonding technology, which does not damage the original fiber structure, is strong, and is not afraid of washing. The processed filling layer is neat and uniform, easy to cut, and has a high yield, which greatly saves labor costs. It is also highly malleable, making the finished garment more beautiful. In addition, the edges and corners can be 100% reused, which is environmentally friendly.

[0018] 4. The present invention can be designed with different numbers of layers according to climate zones. It can be designed with two high-fiber heat-absorbing layers and a middle low thermal conductivity layer, or it can be designed with three high-fiber heat-absorbing layers and a low thermal conductivity layer between each pair of layers, to meet the needs of different climate regions.

[0019] 5. The high-fiber heat-absorbing layer and low thermal conductivity of this invention are both far-infrared materials, which solve the problems of warmth, wind resistance and moisture permeability, while also having health benefits. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a full-spectrum heat-absorbing clothing composite filling layer provided in Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a full-spectrum heat-absorbing clothing composite filling layer provided in Embodiment 2 of the present invention;

[0023] Figure 3 The structure of far-infrared polypropylene fiber under a high-magnification electron microscope;

[0024] Figure 4 This is a physical image of a full-spectrum heat-absorbing composite filling layer for bedding provided in Embodiment 1 of the present invention;

[0025] Figure 5 This is a physical image of a full-spectrum heat-absorbing composite filling layer for bedding provided in Embodiment 2 of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-High-fiber heat-absorbing layer, 2-Low thermal conductivity layer. Detailed Implementation

[0028] Example 1:

[0029] like Figure 1 and 4As shown, this invention provides a full-spectrum heat-absorbing clothing composite filling layer, comprising a high-fiber heat-absorbing layer 1 and a low-thermal-conductivity layer 2. The high-fiber heat-absorbing layer 1 consists of two layers, and the low-thermal-conductivity layer 2 consists of one layer, located between the high-fiber heat-absorbing layers 1. This design is suitable for central and southern regions of my country, and for areas with minimum temperatures above -15°C. The high-fiber heat-absorbing layer is in the form of flakes, and the high-fiber heat-absorbing layer 1 and the low-thermal-conductivity layer 2 are bonded together. The high-fiber heat-absorbing layer 1 is made by adding 1% ceramic particles with a particle size between 1 and 100 nm to polyester fibers. The ceramic particles are oxide ceramic particles, specifically Al2O3, TiO2, SiO2, and Fe2O3, each accounting for 25%. The low-thermal-conductivity layer 2 is far-infrared polypropylene fiber.

[0030] The average pore size of the far-infrared polypropylene fiber is between 2 μm and 3 μm.

[0031] A method for preparing a full-spectrum heat-absorbing composite filling layer for bedding, characterized by comprising the following steps:

[0032] 1) Preparation of high-fiber heat-absorbing layer: Ceramic particles are calcined at 600℃~700℃ for 2.5~3.5 hours, cooled, and ground to particles with a particle size of 1nm~100nm. Polyester chips are dried and melted into polyester melt. The above particles are added in proportion by online addition. The melt is then conveyed to the spinning box by a screw extruder for spinning to produce high-fiber heat-absorbing layer.

[0033] 2) Layered composite: Two high-fiber heat-absorbing layers and a low thermal conductivity layer are composited using a thermally melted fiber machine to obtain the finished product.

[0034] Example 2:

[0035] like Figure 2 and 5 As shown, this invention provides a full-spectrum heat-absorbing clothing composite filling layer, comprising a high-fiber heat-absorbing layer 1 and a low-thermal-conductivity layer 2. The high-fiber heat-absorbing layer 1 consists of three layers, and the low-thermal-conductivity layer 2 consists of two layers, with the low-thermal-conductivity layer 2 located between each pair of high-fiber heat-absorbing layers 1. This design is suitable for northern my country, regions where the lowest temperature is between -15℃ and -35℃. The high-fiber heat-absorbing layer 1 is in the form of flakes, and the high-fiber heat-absorbing layer 1 and the low-thermal-conductivity layer 2 are bonded together. The high-fiber heat-absorbing layer 1 is made by adding 10% ceramic particles with a particle size between 1 and 100 nm to polyester fibers. The ceramic particles are carbide ceramic particles, specifically 20% each of SiC, TiC, MoC, ZrC, and Cr3C2. The low-thermal-conductivity layer 2 is far-infrared polypropylene fiber.

[0036] A method for preparing a full-spectrum heat-absorbing composite filling layer for bedding, characterized by comprising the following steps:

[0037] 1) Preparation of high-fiber heat-absorbing layer: Ceramic particles are calcined at 600℃~700℃ for 2.5~3.5 hours, cooled, and ground to particles with a particle size of 1nm~100nm. Polyester chips are dried and melted into polyester melt. The above particles are added in proportion by online addition. The melt is then conveyed to the spinning box by a screw extruder for spinning to produce high-fiber heat-absorbing layer.

[0038] 2) Layered Composite: Three high-fiber heat-absorbing layers and two low-thermal-conductivity layers are distributed in an alternating pattern of one high-fiber heat-absorbing layer and one low-thermal-conductivity layer, and composited using a thermoplastic fiber machine to obtain the finished product. Example 3:

[0039] like Figure 2 and 5 As shown, this invention provides a full-spectrum heat-absorbing clothing composite filling layer, comprising a high-fiber heat-absorbing layer 1 and a low-thermal-conductivity layer 2. The high-fiber heat-absorbing layer 1 consists of three layers, and the low-thermal-conductivity layer 2 consists of two layers, with the low-thermal-conductivity layer 2 located between each pair of high-fiber heat-absorbing layers 1. This design is suitable for northern my country, regions where the lowest temperature is between -15℃ and -35℃. The high-fiber heat-absorbing layer 1 is in the form of flakes, and the high-fiber heat-absorbing layer 1 and the low-thermal-conductivity layer 2 are bonded together. The high-fiber heat-absorbing layer 1 is made by adding 5% ceramic particles with a particle size between 1 and 100 nm to polyester fibers. The ceramic particles are a mixture of oxide ceramic particles and carbide ceramic particles, specifically Al2O3, TiO2, MoC, ZrC, and Cr3C2, each accounting for 20%. The low-thermal-conductivity layer 2 is far-infrared polypropylene fiber.

[0040] A method for preparing a full-spectrum heat-absorbing composite filling layer for bedding, characterized by comprising the following steps:

[0041] 1) Preparation of high-fiber heat-absorbing layer: Ceramic particles are calcined at 600℃~700℃ for 2.5~3.5 hours, cooled, and ground to particles with a particle size of 1nm~100nm. Polyester chips are dried and melted into polyester melt. The above particles are added in proportion by online addition. The melt is then conveyed to the spinning box by a screw extruder for spinning to produce high-fiber heat-absorbing layer.

[0042] 2) Layered Composite: Three high-fiber heat-absorbing layers and two low-thermal-conductivity layers are distributed in an alternating pattern of one high-fiber heat-absorbing layer and one low-thermal-conductivity layer, and composited using a thermoplastic fiber machine to obtain the finished product. Example 4:

[0043] like Figure 1 and 4As shown, this invention provides a full-spectrum heat-absorbing clothing composite filling layer, comprising a high-fiber heat-absorbing layer 1 and a low-thermal-conductivity layer 2. The high-fiber heat-absorbing layer 1 consists of two layers, and the low-thermal-conductivity layer 2 consists of one layer, with the low-thermal-conductivity layer 2 located between the high-fiber heat-absorbing layers 1. This design is suitable for central and southern regions of my country, and for areas with minimum temperatures above -15°C. The high-fiber heat-absorbing layer 1 is in the form of flakes, and the high-fiber heat-absorbing layer 1 and the low-thermal-conductivity layer 2 are bonded together. The high-fiber heat-absorbing layer 1 is made by adding 3% ceramic particles with a particle size between 1 and 100 nm to polyester fibers. The ceramic particles are a mixture of oxide ceramic particles and carbide ceramic particles, specifically Al2O3, TiO2, SiC, and TiC each accounting for 25%. The low-thermal-conductivity layer 2 is far-infrared polypropylene fiber.

[0044] A method for preparing a full-spectrum heat-absorbing composite filling layer for bedding, characterized by comprising the following steps:

[0045] 1) Preparation of high-fiber heat-absorbing layer: Ceramic particles are calcined at 600℃~700℃ for 2.5~3.5 hours, cooled, and ground to particles with a particle size of 1nm~100nm. Polyester chips are dried and melted into polyester melt. The above particles are added in proportion by online addition. The melt is then conveyed to the spinning box by a screw extruder for spinning to produce high-fiber heat-absorbing layer.

[0046] 2) Layered composite: Two high-fiber heat-absorbing layers and a low thermal conductivity layer are composited using a thermally melted fiber machine to obtain the finished product.

[0047] Example 5:

[0048] like Figure 2 and 5 As shown, this invention provides a full-spectrum heat-absorbing clothing composite filling layer, comprising a high-fiber heat-absorbing layer 1 and a low-thermal-conductivity layer 2. The high-fiber heat-absorbing layer 1 consists of three layers, and the low-thermal-conductivity layer 2 consists of two layers, with the low-thermal-conductivity layer 2 located between each pair of high-fiber heat-absorbing layers 1. This design is suitable for northern my country, regions where the lowest temperature is between -15℃ and -35℃. The high-fiber heat-absorbing layer 1 is in the form of flakes, and the high-fiber heat-absorbing layer 1 and the low-thermal-conductivity layer 2 are bonded together. The high-fiber heat-absorbing layer 1 is made by adding 5% ceramic particles with a particle size between 1 and 100 nm to polyester fibers. The ceramic particles are a mixture of oxide ceramic particles and carbide ceramic particles, specifically SiO2 and Cr3C2 each accounting for 50%. The low-thermal-conductivity layer 2 is far-infrared polypropylene fiber.

[0049] The average pore size of far-infrared polypropylene fibers is between 2µm and 3µm.

[0050] A method for preparing a full-spectrum heat-absorbing composite filling layer for bedding, characterized by comprising the following steps:

[0051] 1) Preparation of high-fiber heat-absorbing layer: Ceramic particles are calcined at 600℃~700℃ for 2.5~3.5 hours, cooled, and ground to particles with a particle size of 1nm~100nm. Polyester chips are dried and melted into polyester melt. The above particles are added in proportion by online addition. The melt is then conveyed to the spinning box by a screw extruder for spinning to produce high-fiber heat-absorbing layer.

[0052] 2) Layered composite: Three high-fiber heat-absorbing layers and two low-thermal-conductivity layers are distributed in an alternating manner with one high-fiber heat-absorbing layer and one low-thermal-conductivity layer, and the composite is obtained by using a hot melt fiber machine.

[0053] Experimental example:

[0054] 1. Thermal insulation test

[0055] Test method:

[0056] Four ordinary adult men were selected as subjects and divided into two groups of two. One group wore clothing filled with the filling layer of Embodiment 1 of the present invention as the experimental group, and the other group wore existing down jackets as the control group. The two groups of clothing had the same weight, the same amount of down filling, the same style, and the same fabric. The two groups of subjects were tested with a probe thermometer under outdoor conditions of -10℃. The temperature was recorded every minute. The results are shown in Table 1.

[0057] Table 1 Results of thermal insulation test

[0058]

[0059]

[0060] As shown in Table 1, the initial temperatures of the experimental group and the control group were not significantly different. At the second minute, the temperature of the experimental group was more than 1°C higher than that of the control group. From the third to the thirteenth minute, the temperature of the experimental group consistently rose higher than that of the control group, ultimately reaching a temperature approximately 4°C higher. This demonstrates that the filling layer of this invention has superior warmth retention compared to existing down jackets. Furthermore, the temperature of the filling layer of this invention can rise by 4°C within 2-3 minutes, achieving a photothermal conversion rate of approximately 96%.

[0061] 2. Breathability test:

[0062] Test standard: GB / T5453-1997 Test for air permeability of textile fabrics

[0063] Test instrument: YG461E medium-pressure air permeability meter

[0064] Experimental method: Take 20cm samples each of Example 1, cotton, wool, and silk. 2The sample is conditioned and balanced in a constant temperature and humidity environment for a certain period of time, and then tested in this environment. The sample is held flat and wrinkle-free on the air permeability meter fixture, the instrument is started, and airflow is allowed to pass through the sample. The airflow is adjusted so that the pressure drop value reaches 100pa. The airflow rate passing vertically through the specified sample area within a certain time is measured. The same sample is tested 10 times, and the average value is taken to calculate the air permeability. The higher the air permeability, the better the air permeability of the product.

[0065] The test results are shown in Table 2. As can be seen from Table 2, the air permeability of the filling layer of the present invention is much higher than that of the filling layer of existing thermal insulation products, and the air permeability is good.

[0066] Table 2 Results of air permeability test

[0067] sample <![CDATA[Air permeability (L / m 2 .s)]]> The filling layer of the present invention 1165.17 cotton 371.67 wool 381.00 silk 725.38

[0068] 3. Moisture permeability test

[0069] Test standard: GB / T12704-1991 Method for Determination of Moisture Permeability of Fabrics - Moisture Permeability Cup Method

[0070] Test instrument: YG601 computerized fabric moisture permeability meter

[0071] Test method: Fill a clean and dry moisture-permeable cup with desiccant. Take the sample from Example 1 and cotton, wool and silk as the test samples. Seal the cup with the test samples and quickly put it into the test chamber. Take it out after half an hour, quickly cover the cup with the lid, put it in the desiccator to balance for half an hour, weigh each one, remove the cup lid, quickly put it into the test chamber, take it out after another hour, repeat the previous steps, balance and weigh, calculate the moisture permeability based on the difference in weight of the two assemblies, and the results are shown in Table 3. As can be seen from Table 3, the moisture permeability of the filling layer of the present invention is higher than that of the existing thermal insulation product filling layer, and the moisture permeability is good.

[0072] Table 3 Results of the moisture permeability test

[0073] sample <![CDATA[Water vapor permeability (g / m 2 .d)]]> The filling layer of the present invention 6032.23 cotton 5095.54 wool 5289.32 silk 5718.33

[0074] Working principle: The outer high-fiber heat-absorbing layer utilizes light resources (visible and invisible light) for heat energy conversion and heat storage, achieving a photothermal conversion rate of up to 96% and a far-infrared reflectivity of 92%. It can raise the temperature by 4 degrees Celsius, thus maintaining a higher temperature on the outer layer of the filling layer. The heat radiation emitted by the human skin is reflected back by the inner high-fiber heat-absorbing layer, with a reflectivity of approximately 92%. The middle low thermal conductivity layer is made of far-infrared polypropylene fiber, with a thermal conductivity of 0.117 W / (m·K), lower than cotton, wool, and other fiber materials. It possesses the characteristics of ultra-fine fiber and high density, reflecting low-energy wavelengths from the human body, effectively limiting heat convection, reducing heat loss, maximizing the retention of body heat, reducing the temperature difference between the two sides of the garment, thus providing warmth and increasing wind resistance. Furthermore, due to the characteristics of far-infrared polypropylene fiber material, the low thermal conductivity layer has hydrophobic and breathable properties, which can effectively remove moisture emitted by the human body and improve the internal body temperature environment. The effective blocking rate against viruses can reach more than 90%, which can effectively prevent viruses from infecting human skin. It has the advantages of being mildew-proof, antibacterial, water-resistant, non-lint-shedding, quick-drying, wind-resistant, lightweight, soft, moisture-wicking, and having good shape retention and resilience.

[0075] The middle layer of far-infrared polypropylene fiber with low thermal conductivity is a superfiber with an irregular bonded structure, which is far superior to warp and weft woven fabrics. The gaps between warp and weft threads in a traditional fabric are like straight roads, while the irregular ultrafine fibers are winding and convoluted, restricting airflow and trapping air for a greater time and in greater space, thus providing excellent wind resistance. Figure 3 It can be seen that the average pore size of far-infrared polypropylene fiber is between 2μm and 3μm. The density of air retention space is large at the microscopic level, which can effectively block strong heat convection of air, thus resulting in excellent heat insulation performance. It can effectively avoid the temperature difference between the inside and outside of the clothing. Under the same fabric weight and thickness conditions, the heat insulation performance can be improved by 20% to 40%, which can reduce the weight by the same amount and save the amount of raw material filling.

[0076] The design employs a layered composite method, utilizing fiber wadding to create a uniform, wide-width flat surface of appropriate weight. The layered composite process uses hot melt adhesive fiber low-temperature bonding technology, which does not damage the original fiber structure, ensuring strength and water resistance. The processed filling layer is neat and uniform, offering significant advantages over its competitors. It is also convenient to cut, environmentally friendly, greatly saves labor costs, and has strong plasticity, resulting in more aesthetically pleasing garments.

[0077] In practical applications, the quality of the filling layer can be determined based on the temperature and wind speed. When the wind force is greater than level three, the dense fibers of the low thermal conductivity layer can basically seal the pores of 0.2 to 0.5 μm. Due to the pressure difference, this directly and effectively prevents the loss of heat from the body and ensures the effective maintenance of the body temperature. When the wind force is less than level three, the hot and humid air inside the body will be discharged to the outside through the gaps, thus achieving the functions of both warmth and breathability.

[0078] Especially in high-altitude and cold regions with long hours of sunshine and high reflectivity of snow, it can efficiently utilize light energy and retain body heat. For outdoor sports enthusiasts and athletes, it can effectively reduce clothing weight, make clothing lighter, and improve quick response capabilities. Furthermore, due to the far-infrared effect, it has medical and health benefits for the elderly and patients. It is of great significance to border guards who are stationed in high-altitude and cold regions for extended periods, achieving dual military and civilian use.

[0079] Based on the five climate zones, the number of layers and weight can be adjusted to achieve the best cost-effectiveness.

[0080] The high-fiber heat-absorbing layer and low thermal conductivity layer of this invention can be flame-retardant treated as needed to increase the flame-retardant properties of the clothing.

[0081] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A full-spectrum heat-absorbing composite filling layer for bedding, characterized in that, It includes a high-fiber heat-absorbing layer and a low-thermal-conductivity layer, wherein the high-fiber heat-absorbing layer comprises at least two layers and the low-thermal-conductivity layer comprises at least one layer, wherein the low-thermal-conductivity layer is located between the high-fiber heat-absorbing layers, wherein the high-fiber heat-absorbing layer is in the form of flakes, and wherein the high-fiber heat-absorbing layer and the low-thermal-conductivity layer are bonded together, wherein the high-fiber heat-absorbing layer is made by adding 1% to 10% of ceramic particles with a particle size between 1 and 100 nm to polyester fibers, and wherein the low-thermal-conductivity layer is far-infrared polypropylene fiber; The high-fiber heat-absorbing layer consists of three layers, and the low-thermal-conductivity layer consists of two layers, with the low-thermal-conductivity layer located between each pair of high-fiber heat-absorbing layers. The ceramic particles are one or both of oxide ceramic particles and carbide ceramic particles. The oxide ceramic particles are one or more of Al2O3, TiO2, SiO2 and Fe2O3, and the carbide ceramic particles are one or more of SiC, TiC, MoC, ZrC and Cr3C2. The average pore size of the far-infrared polypropylene fiber is between 2 μm and 3 μm.

2. The method for preparing a full-spectrum heat-absorbing composite filling layer for clothing as described in claim 1, characterized in that, Includes the following steps: 1) Preparation of high-fiber heat-absorbing layer: Ceramic particles are calcined at 600℃~700℃ for 2.5~3.5 hours, cooled, and ground to particles with a particle size of 1nm~100nm. Polyester chips are dried and melted into polyester melt. The above particles are added in proportion by online addition. The melt is then conveyed to the spinning box by a screw extruder for spinning to produce high-fiber heat-absorbing layer. 2) Layered composite: The high-fiber heat-absorbing layer and the low thermal conductivity layer are composited using a thermally melted fiber machine to obtain the finished product.

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