Temperature-regulating, self-heating and long-lastingly warm woolen batt and method for producing the same

Abstract

The present application discloses a temperature-regulating, self-heating and long-lasting warm woolen fluff sheet, which comprises a hydrophilic heat-releasing layer, a temperature control layer and a hollow warm-keeping layer from bottom to top. The preparation method of the temperature-regulating, self-heating and long-lasting warm woolen fluff sheet comprises the following steps: selecting raw materials; obtaining moisture-absorbing wool fibers; assembling the hydrophilic heat-releasing layer; obtaining moisture-permeable wool fibers; obtaining modified phase-change temperature-regulating acrylic fibers; assembling the temperature control layer; obtaining mercerized wool fibers; assembling the hollow warm-keeping layer; and pre-needling and compounding the hydrophilic heat-releasing layer, the temperature control layer and the hollow warm-keeping layer, and then performing hot melt bonding to obtain the temperature-regulating, self-heating and long-lasting warm woolen fluff sheet. The present application effectively recycles heat energy, so that the material continuously absorbs, releases and keeps heat in a dynamic environment, realizing the long-lasting warmth and temperature regulation of the woolen fluff sheet.

Description

Technical Field

[0001] This invention belongs to the field of textile materials technology, and relates to temperature-regulating, self-heating and long-lasting warmth wool wadding. This invention also relates to a method for preparing temperature-regulating, self-heating and long-lasting warmth wool wadding. Background Technology

[0002] In cold climates, warmth is a fundamental need, and insulating materials, as essential for resisting the effects of low temperatures, play a vital role in people's lives. With the continuous advancement of textile technology, the development of insulating materials has been rapid, with research and development increasingly focusing on specialization and functionality. Traditional insulating materials rely heavily on static insulation effects, primarily increasing fabric thickness and density, and enhancing the amount of air trapped within the fibers to reduce heat conduction and convection, thereby improving insulation performance. However, this approach cannot adjust to changes in ambient temperature, leading to a poor wearer experience, affecting the overall aesthetics of the garment, and causing inconvenience in movement.

[0003] In recent years, temperature-regulating materials have gradually become a research hotspot. However, existing materials generally suffer from problems such as high cost and poor comfort. Moreover, existing materials are mostly focused on a single temperature-regulating function and lack self-heating, temperature regulation and long-lasting warmth retention. Summary of the Invention

[0004] The purpose of this invention is to provide a wool wadding that is temperature-regulating, self-heating, and provides long-lasting warmth.

[0005] Another object of the present invention is to provide a method for preparing a temperature-regulating, self-heating, and long-lasting warm wool wadding.

[0006] The first technical solution adopted in this invention is a temperature-regulating, self-heating, and long-lasting warm wool wadding. The structure of the wool wadding includes, from bottom to top, a hydrophilic heat-releasing layer, a temperature-controlling layer, and a hollow insulation layer. The temperature-controlling layer is rotated 45° relative to the hydrophilic heat-releasing layer, and the hollow insulation layer is rotated 90° relative to the hydrophilic heat-releasing layer and 45° relative to the temperature-controlling layer. The temperature-controlling layer includes, from top to bottom, a first top layer and a first bottom layer. The hollow insulation layer includes, from top to bottom, a second top layer, a middle layer, and a second bottom layer.

[0007] The second technical solution adopted in this invention is a method for preparing temperature-regulating, self-heating, and long-lasting warm wool wadding, which is implemented according to the following steps: Step 1: Select wool fiber, moisture-absorbing and heat-generating acrylic fiber, phase change temperature-regulating acrylic fiber, kapok fiber, and heterogeneous low-melting-point fiber as raw materials. Step 2: Treat the wool fibers with alkaline enzymes to obtain moisture-absorbing wool fibers; Step 3: Combing and web-laying the moisture-absorbing wool fiber, moisture-absorbing and heat-generating acrylic fiber, and the heterogeneous low-melting-point fiber with sheath and core, to obtain a hydrophilic heat-releasing layer; Step 4: Treat the wool fibers with acidic enzymes to obtain permeable wool fibers. Step 5: Perform plasma etching on the phase change temperature-regulating acrylic fiber to obtain etched phase change temperature-regulating acrylic fiber; prepare a phase change microcapsule solution, immerse the etched phase change temperature-regulating acrylic fiber in the phase change microcapsule solution to obtain modified phase change temperature-regulating acrylic fiber. Step 6: Comb and lay the moisture-permeable wool fiber, modified phase change temperature-regulating acrylic fiber, and sheath-core heterogeneous low-melting-point fiber to obtain the temperature control layer. Step 7: Chlorinate and dechlorinate the wool fibers to obtain mercerized wool fibers; Step 8: Comb and lay out the kapok fiber, mercerized wool fiber and heterogeneous low melting point fiber to obtain a hollow insulation layer; Step 9: Pre-needle-punch composite of water-release heat layer, temperature control layer and hollow insulation layer, followed by hot-melt bonding to obtain a wool wadding sheet with temperature regulation, self-heating and long-lasting warmth.

[0008] The invention is further characterized by: The raw materials include wool fibers with a diameter of 17-30μm and an average length of 35-51mm; hygroscopic and heat-generating acrylic fibers with a diameter of 2-3dtex and an average length of 30-60mm; phase change temperature-regulating acrylic fibers with a diameter of 1.5-5D, an average length of 38-51mm, and an enthalpy of 15-40J; kapok fibers with a diameter of 30-36μm and an average length of 20-32mm; and core-sheath heterogeneous low-melting-point fibers with a diameter of 1.5-2D and an average length of 38-51mm.

[0009] The alkaline enzyme treatment specifically involves preparing a mixed solution A with a concentration of 1-3 g / L activator and 2-4 g / L alkaline protease. The pH of solution A is adjusted to 10-11, and the solution is heated in a water bath to 40-60°C. Then, the solution A is kept at a bath ratio of 1:20 to wool fibers for 30 minutes to obtain pretreated wool fibers A. After washing the pretreated wool fibers A with water, the solution is heated to 70-90°C to inactivate the alkaline protease. After inactivation, the solution is washed again to remove residues. Finally, the solution is dried in a hot air environment at 60°C to obtain hygroscopic wool fibers.

[0010] The acidic enzyme treatment specifically involves preparing a mixed solution B with a concentration of 1-3 g / L activator and 2-4 g / L acidic protease. The pH of solution B is adjusted to 5.5-6.5, and the solution is heated in a water bath to 40-60°C. Then, the solution is kept at a bath ratio of 1:20 to wool fibers for 30 minutes to obtain pretreated wool fibers B. After washing the pretreated wool fibers B with water, the solution is heated to 70-90°C to inactivate the acidic protease. After inactivation, the solution is washed again to remove residues. Finally, the solution is dried in a hot air environment at 60°C to obtain permeable wool fibers.

[0011] Step 5 specifically involves: Step 501: Use deionized water to repeatedly wash the phase change temperature-regulating acrylic fiber 2-5 times to remove impurities from the surface of the phase change temperature-regulating acrylic fiber. Step 502: The cleaned phase change temperature-regulating acrylic fibers are arranged into parallel and straight fiber bundles, then attached to a metal sheet. The metal sheet is placed in a plasma instrument and etched in an air atmosphere. The etching conditions are: power range of 70-300W, air pressure of 20-65Pa, air flow rate of 10-20sccm, etching time of 1-30min, and etching depth of 1-5μm. After etching is completed, the sample is rinsed with deionized water to remove residual gas and by-products. After cleaning, the sample is placed in a drying oven for drying to obtain etched phase change temperature-regulating acrylic fibers. Step 503: Weigh phase change microcapsules with a phase change temperature of 30-35℃, mix 20-40% of the phase change microcapsules with a phase change temperature of 30-35℃ with 3-10% of the binder to prepare phase change microcapsule solution C, immerse the etched phase change temperature-regulating acrylic fiber in solution C at a temperature of 30-50℃ for 50-90 minutes, and dry it in an environment of 60-90℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber A; Step 504: Weigh phase change microcapsules with a phase change temperature of 25-30℃, mix 20-40% of the phase change microcapsules with a phase change temperature of 25-30℃ and 3-10% of the binder to prepare phase change microcapsule solution D, immerse the etched phase change temperature-regulating acrylic fiber in solution D at a temperature of 30-50℃ for 50-90 minutes, and dry it in an environment of 60-90℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber B.

[0012] The hydrophilic heat-releasing layer contains, by mass percentage, 50-70% moisture-absorbing wool fiber, 20-40% moisture-absorbing and heat-generating acrylic fiber, and 5-30% heterogeneous low-melting-point fiber. The temperature control layer consists of 20-40% modified phase change temperature-regulating acrylic fiber, 50-70% moisture-permeable wool fiber, and 5-30% heterogeneous low-melting-point fiber. The temperature control layer consists of a first top layer and a first bottom layer from top to bottom, with the first top layer being the side furthest from the human body. The hollow insulation layer consists of a second top layer, a middle layer, and a second bottom layer from top to bottom. The second top layer is the side away from the human body, and its mass percentage is 10-20% kapok fiber, 60-80% mercerized wool fiber, and 5-30% heterogeneous low-melting-point fiber in the core and sheath. The middle layer has a mass percentage of 20-30% kapok fiber, 50-70% mercerized wool fiber, and 5-30% heterogeneous low-melting-point fiber in the core and sheath. The second bottom layer has a mass percentage of 30-40% kapok fiber, 40-60% mercerized wool fiber, and 5-30% heterogeneous low-melting-point fiber in the core and sheath.

[0013] The modified phase change temperature-regulating acrylic fiber in the first top layer is modified phase change temperature-regulating acrylic fiber A, and its phase change microcapsule phase change temperature is 30-35℃. The modified phase change temperature-regulating acrylic fiber in the first bottom layer is modified phase change temperature-regulating acrylic fiber B, and its phase change microcapsule phase change temperature is 25-30℃. The phase change microcapsule core material is high-purity n-alkane paraffin, and the shell material is polymethyl methacrylate or polyurethane.

[0014] Step 7 specifically includes: Step 701: Prepare a sodium hypochlorite solution E with a mass percentage of 0.2-0.5%, adjust the pH of solution E to 2-3 using hydrochloric acid, and soak wool fibers at a bath ratio of 1:15 for 15 minutes at room temperature to obtain chlorinated wool fibers. Step 702: Prepare a mixed solution F of sodium carbonate and sodium sulfite with a mass percentage of 0.1-0.3% and 0.02-0.07%, adjust the pH of solution F to 9-10, add chlorinated wool fibers to solution F for dechlorination treatment, soak at room temperature for 40 minutes at a bath ratio of 1:15, then wash until neutral, and dry at 60°C to obtain mercerized wool fibers.

[0015] Step 9 specifically includes: Step 901: Arrange the hydrophilic heat release layer, the temperature control layer, and the hollow insulation layer in a manner that gradually moves away from the human body. The thickness ratio of the hydrophilic heat release layer to the temperature control layer is 1:1-3, the thickness ratio of the hydrophilic heat release layer to the hollow insulation layer is 1:2-5, the position of the temperature control layer is rotated 45° relative to the hydrophilic heat release layer, and the position of the hollow insulation layer is rotated 90° relative to the hydrophilic heat release layer and 45° relative to the temperature control layer. Step 902: Use a pre-needling machine to pre-needle the arranged hydrophilic heat release layer, temperature control layer, and hollow insulation layer, with a needle density of 10-50 needles / cm. 2The needling frequency is 5-15Hz, the needling depth is 5-15mm, the needling speed is 1-5m / min, and the needling angle is 60-90°. Step 903: Use hot air with a temperature range of 120℃-150℃ to fuse the fibers for 2-10 minutes. After the hot melt bonding is completed, a temperature-regulating, self-heating, and long-lasting warm wool wadding is obtained.

[0016] The beneficial effects of this invention are: This invention presents a temperature-regulating, self-heating, and long-lasting warm wool wadding with an integrated structural system, significantly improving the tightness between layers. Combined with a progressively offset arrangement, it enhances the entanglement and mechanical interlocking capabilities between layers, avoiding delamination or slippage problems that may occur in traditional multilayer materials. The temperature-regulating, self-heating, and long-lasting warm wool wadding prepared using the method of this invention employs effective heat energy recycling. Locked water molecules release heat under the thermal stimulation of the fibers, improving the warmth retention effect while achieving heat recycling. This allows the material to continuously perform heat absorption, release, and insulation functions in dynamic environments, achieving long-lasting warmth retention and regulating performance of the wool wadding. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the wool wadding sheet of the present invention, which features temperature regulation, self-heating, and long-lasting warmth. Figure 2 This is a schematic diagram of the layer-by-layer offset structure of the wool wadding sheet of the present invention, which provides temperature regulation, self-heating, and long-lasting warmth. Figure 3 This is a schematic diagram of the stepped arrangement structure between the temperature control layers of the wool wadding sheet, which provides temperature regulation, self-heating, and long-lasting warmth according to the present invention. Figure 4 This is a schematic diagram of the multi-layer interlayer structure of the hollow insulating layer of the wool wadding sheet of the present invention, which features temperature regulation, self-heating, and long-lasting warmth. Figure 5 This is a schematic diagram of the cross-sectional structure of the heterogeneous low-melting-point fiber core and sheath of the wool wadding sheet, which provides temperature regulation, self-heating, and long-lasting warmth according to the present invention. Figure 6 This is a schematic diagram of the phase change temperature-regulating acrylic fiber structure of the wool wadding sheet of the present invention, which features temperature regulation, self-heating, and long-lasting warmth.

[0018] In the figure, 1. Hydrophilic heat release layer; 2. Temperature control layer; 3. Hollow insulation layer; 4. First bottom layer; 5. First top layer; 6. Phase change temperature regulating acrylic fiber; 7. Inner microcapsule; 8. Outer microcapsule; 9. Second top layer; 10. Middle layer; 11. Second bottom layer; 12. Skin layer; 13. Core layer. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] Temperature-regulating, self-heating, and long-lasting warm wool wadding, such as Figure 1 As shown, the structure of the plush wadding, from bottom to top, includes a hydrophilic heat-releasing layer 1, a temperature-controlling layer 2, and a hollow heat-insulating layer 3, as follows: Figure 2 As shown, the position of the temperature control layer 2 is rotated 45° relative to the hydrophilic heat release layer 1, and the position of the hollow insulation layer 3 is rotated 90° relative to the hydrophilic heat release layer 1 and 45° relative to the temperature control layer 2, as follows. Figure 3 As shown, the temperature control layer 2 includes a first top layer 5 and a first bottom layer 4 from top to bottom, as follows: Figure 4 As shown, the hollow insulation layer 3 includes, from top to bottom, a second top layer 9, a middle layer 10, and a second bottom layer 11.

[0021] The preparation method of temperature-regulating, self-heating, and long-lasting warm wool wadding is carried out according to the following steps: Step 1: Select wool fiber, moisture-absorbing and heat-generating acrylic fiber, phase change temperature-regulating acrylic fiber, kapok fiber, and heterogeneous low-melting-point fiber as raw materials. Among them, the wool fiber is from Qinghe County Yuguan Wool Products Co., Ltd., with a diameter of 17-30μm and an average length of 35-51mm; the moisture-absorbing and heat-generating acrylic fiber is from Shanghai Zhengjia Milk Silk Technology Co., Ltd., with a diameter of 2-3dtex and an average length of 30-60mm; the phase change temperature-regulating acrylic fiber is from Qingdao Bangte Co., Ltd., with a diameter of 1.5-5D, an average length of 38-51mm, and an enthalpy value of 15-40J; the kapok fiber is from Nantong Xinlvye Nonwoven Fabric Co., Ltd., with a diameter of 30-36μm and an average length of 20-32mm; and the core-sheath heterogeneous low-melting-point fiber is from Jiangsu Zhongshi Fiber Co., Ltd., with a diameter of 1.5-2D and an average length of 38-51mm. Figure 5 As shown, the heterogeneous low-melting-point fiber with sheath and core has a concentric circle structure, including a sheath 12 and a core 13, wherein the melting point of the sheath 12 is 120℃ and the melting point of the core 13 is 160℃.

[0022] Step 2: Treat the wool fibers with alkaline enzymes to obtain hygroscopic wool fibers. Specifically, prepare a mixed solution A with a concentration of 1-3 g / L activator and 2-4 g / L alkaline protease, wherein the alkaline protease is SAVINASE 16 L. Adjust the pH of solution A to 10-11 and heat it in a water bath to 40-60℃. Then, keep it at a bath ratio of 1:20 with wool fibers for 30 minutes to obtain pretreated wool fibers A. After washing the pretreated wool fibers A with water, heat it to 70-90℃ to inactivate the alkaline protease. After inactivation, wash again to remove residues. Finally, dry it in a hot air environment at 60℃ to obtain hygroscopic wool fibers. Step 3: Moisture-absorbing wool fibers, moisture-absorbing and heat-generating acrylic fibers, and heterogeneous low-melting-point fibers are uniformly mixed using an opening machine and a cotton box, and then uniformly carded into a web using a carding machine. The web is then laid out using a web-laying machine to obtain a hydrophilic heat-releasing layer 1. The hydrophilic heat-releasing layer 1 contains, by mass, 50-70% moisture-absorbing wool fibers, 20-40% moisture-absorbing and heat-generating acrylic fibers, and 5-30% heterogeneous low-melting-point fibers. Step 4: Treat the wool fibers with acidic enzymes to obtain permeable wool fibers. Specifically, prepare a mixed solution B with a concentration of 1-3 g / L activator and 2-4 g / L acidic protease. Adjust the pH of solution B to 5.5-6.5 and heat it in a water bath to 40-60℃. Then, keep it at this temperature for 30 minutes when the bath ratio of solution B to wool fibers is 1:20 to obtain pretreated wool fibers B. After washing the pretreated wool fibers B with water, heat it to 70-90℃ to inactivate the acidic protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60℃ to obtain permeable wool fibers. Step 5: Perform plasma etching on the phase change temperature-regulating acrylic fiber to obtain etched phase change temperature-regulating acrylic fiber; prepare a phase change microcapsule solution, immerse the etched phase change temperature-regulating acrylic fiber in the phase change microcapsule solution to obtain modified phase change temperature-regulating acrylic fiber. Step 501: Repeatedly wash the phase change thermoregulating acrylic fiber with deionized water 2-5 times to remove impurities from the surface of the phase change thermoregulating acrylic fiber, such as... Figure 6 As shown, the phase change temperature-regulating acrylic fiber 6 has several internal microcapsules 7 distributed inside, and the phase change temperature of the internal microcapsules 7 is 15-25℃. Step 502: The cleaned phase change temperature-regulating acrylic fibers are arranged into parallel and straight fiber bundles, and then attached to a metal sheet. The metal sheet is placed in a plasma instrument and etched in an air atmosphere. The etching conditions are: power range of 70-300W, air pressure of 20-65Pa, air flow rate of 10-20sccm, etching time of 1-30min, and etching depth of 1-5μm. If the etching depth is too deep, it will damage the internal microcapsules 7. After etching is completed, the sample is rinsed with deionized water to remove residual gas and by-products. After cleaning, the sample is placed in a drying oven for drying to obtain etched phase change temperature-regulating acrylic fibers. Step 503: Weigh phase change microcapsules with a phase change temperature of 30-35℃, mix 20-40% of the phase change microcapsules with a phase change temperature of 30-35℃ with 3-10% of the binder to prepare phase change microcapsule solution C, immerse the etched phase change temperature-regulating acrylic fiber in solution C at a temperature of 30-50℃ for 50-90 minutes, and dry it in an environment of 60-90℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber A; Step 504: Weigh phase change microcapsules with a phase change temperature of 25-30℃, mix 20-40% of the phase change microcapsules with a phase change temperature of 25-30℃ and 3-10% of the binder to prepare phase change microcapsule solution D, immerse the etched phase change temperature-regulating acrylic fiber in solution D at a temperature of 30-50℃ for 50-90 minutes, and dry it in an environment of 60-90℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber B; Step 6: Moisture-permeable wool fibers, modified phase change temperature-regulating acrylic fibers, and heterogeneous core-sheath low-melting-point fibers are uniformly mixed using an opening machine and a cotton box, and then uniformly carded into a web using a carding machine. This web is then laid out using a web-laying machine to obtain the temperature control layer 2. The mass percentages of the temperature control layer 2 are 20-40% modified phase change temperature-regulating acrylic fibers, 50-70% moisture-permeable wool fibers, and 5-30% heterogeneous core-sheath low-melting-point fibers. The temperature control layer 2 consists of a first top layer 5 and a first bottom layer 4 from top to bottom, with the first top layer 5 being the side furthest from the human body. Figure 6 As shown, modified phase change temperature-regulating acrylic fiber 6 has several external microcapsules 8 distributed on its exterior. The modified phase change temperature-regulating acrylic fiber in the first top layer 5 is modified phase change temperature-regulating acrylic fiber A, and the phase change temperature of its external microcapsules 8 is 30-35℃. The modified phase change temperature-regulating acrylic fiber in the first bottom layer 4 is modified phase change temperature-regulating acrylic fiber B, and the phase change temperature of its external microcapsules 8 is 25-30℃. The phase change temperature of the internal microcapsules 7 is lower than that of the external microcapsules 8, and the phase change temperature of the first bottom layer 4 is lower than that of the first top layer 5. The phase change microcapsules have a core material of high-purity n-alkane paraffin and a shell material of polymethyl methacrylate or polyurethane. Step 7: Chlorinate and dechlorinate the wool fibers to obtain mercerized wool fibers; Step 701: Prepare a sodium hypochlorite solution E with a mass percentage of 0.2-0.5%, adjust the pH of solution E to 2-3 using hydrochloric acid, and soak wool fibers at a bath ratio of 1:15 for 15 minutes at room temperature to obtain chlorinated wool fibers. Step 702: Prepare a mixed solution F of sodium carbonate and sodium sulfite with a mass percentage of 0.1-0.3% and 0.02-0.07%, adjust the pH of solution F to 9-10, add chlorinated wool fibers to solution F for dechlorination treatment, soak at room temperature for 40 minutes at a bath ratio of 1:15, then wash until neutral, and dry at 60°C to obtain mercerized wool fibers; Step 8: Thoroughly pre-clean the kapok fibers to remove surface impurities. Immerse the pre-cleaned kapok fibers in a wool oil solution containing 2-6% owf (owl f.), using an aliphatic polymer compound, nonionic or anionic, at a liquor ratio of 1:7 to 1:10. Soak at room temperature for 30-50 minutes. Remove the kapok fibers, clean and dry them. Mix the kapok fibers, mercerized wool fibers, and heterogeneous low-melting-point fibers through an opening machine and a cotton box. Card the mixture evenly into a web using a carding machine, and then lay it evenly using a web-laying machine to obtain the hollow insulation layer 3. The hollow insulation layer 3 consists of a second top layer 9, a middle layer 10, and a second bottom layer from top to bottom. 11. The second top layer (9) is the side furthest from the human body, and its mass percentages are: 10-20% kapok fiber, 60-80% mercerized wool fiber, and 5-30% heterogeneous low-melting-point fiber (core-sheath hybrid). The middle layer (10) has a mass percentage of: 20-30% kapok fiber, 50-70% mercerized wool fiber, and 5-30% heterogeneous low-melting-point fiber (core-sheath hybrid). The second bottom layer (11) has a mass percentage of: 30-40% kapok fiber, 40-60% mercerized wool fiber, and 5-30% heterogeneous low-melting-point fiber (core-sheath hybrid). Step 9: Pre-needle-punching composite of water-release heat layer 1, temperature control layer 2 and hollow insulation layer 3, followed by hot-melt bonding to obtain a temperature-regulating, self-heating and long-lasting warm wool wadding sheet. Step 901: Arrange the hydrophilic heat release layer 1, the temperature control layer 2, and the hollow insulation layer 3 in a manner that gradually moves away from the human body. The thickness ratio of the hydrophilic heat release layer 1 to the temperature control layer 2 is 1:1-3, the thickness ratio of the hydrophilic heat release layer 1 to the hollow insulation layer 3 is 1:2-5, the total thickness of the hydrophilic heat release layer 1, the temperature control layer 2, and the hollow insulation layer 3 is 6-13mm, the position of the temperature control layer 2 is rotated 45° relative to the hydrophilic heat release layer 1, and the position of the hollow insulation layer 3 is rotated 90° relative to the hydrophilic heat release layer 1 and 45° relative to the temperature control layer 2. Step 902: Use a pre-needling machine to pre-needle the arranged hydrophilic heat release layer 1, temperature control layer 2, and hollow insulation layer 3, with a needle density of 10-50 needles / cm.2 The needling frequency is 3-15Hz, the needling depth is 5-15mm, the needling speed is 1-5m / min, and the needling angle is 60-90°. Step 903: Hot air with a temperature range of 120℃-150℃ is used for fusion, in which the heterogeneous low melting point fibers of the core and sheath are evenly distributed between the layers for bonding. The fusion time is 2-10 minutes. After the hot melt bonding is completed, a wool wadding sheet with temperature regulation, self-heating and long-lasting warmth is obtained.

[0023] In this invention, the hydrophilic heat-releasing layer 1 aims to provide moisture absorption and heat release properties. The moisture-absorbing wool fibers in the hydrophilic heat-releasing layer 1 can absorb moisture from sweat, reduce body surface moisture, and work synergistically with the moisture-absorbing and heat-generating acrylic fibers to better achieve heat generation performance. The temperature control layer 2 is located in the middle, and the moisture-permeable wool fibers allow the absorbed moisture to pass through better, preventing moisture accumulation within the layer. Working together with the modified phase change temperature-regulating acrylic fibers, it forms a two-way regulation mechanism, ensuring effective moisture release while absorbing moisture. At the same time, the temperature control layer 2's temperature regulation function ensures a comfortable wearing experience. The hollow insulation layer 3 adopts a design that combines multi-layered kapok fibers and mercerized wool fibers. The mercerized wool enhances the feel and luster, achieving a balance between warmth and weight reduction. In addition, the hollow fiber design effectively isolates the external environment, improving the overall warmth performance.

[0024] Example 1 Step 1: Select wool fibers with a diameter of 30μm and an average length of 51mm; hygroscopic and heat-generating acrylic fibers with a diameter of 2.67dtex and an average length of 38mm; phase change temperature-regulating acrylic fibers with a diameter of 1.5D, an average length of 38mm, and an enthalpy of 15J; kapok fibers with a diameter of 30μm and an average length of 20mm; and heterogeneous core-sheath low-melting-point fibers with a diameter of 1.5D and an average length of 38mm as raw materials. Step 2: Prepare a mixed solution A with a concentration of 3 g / L activator and 3 g / L alkaline protease. Adjust the pH of solution A to 10 and heat it to 50°C in a water bath. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution A and wool fiber to obtain pretreated wool fiber A. Wash the pretreated wool fiber A with water and heat it to 80°C to inactivate the alkaline protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60°C to obtain moisture-absorbing wool fiber. Step 3: Moisture-absorbing wool fiber, moisture-absorbing and heat-generating acrylic fiber, and heterogeneous low-melting-point fiber are uniformly mixed using an opening machine and a cotton box, and then uniformly carded into a web using a carding machine. The web is then laid out using a web-laying machine to a thickness of 1 mm, and a hydrophilic heat-releasing layer 1 is obtained by uniformly laying the web. The hydrophilic heat-releasing layer 1 has the following mass percentages: 50% moisture-absorbing wool fiber, 30% moisture-absorbing and heat-generating acrylic fiber, and 20% heterogeneous low-melting-point fiber. Step 4: Prepare a mixed solution B with a concentration of 3 g / L activator and 3 g / L acidic protease. Adjust the pH of solution B to 5.5 and heat it to 50°C in a water bath. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution B and wool fiber to obtain pretreated wool fiber B. Wash the pretreated wool fiber B with water and heat it to 80°C to inactivate the acidic protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60°C to obtain breathable wool fiber. Step 5: Repeat the cleaning of the phase change temperature-regulating acrylic fiber three times with deionized water to remove impurities on the surface of the phase change temperature-regulating acrylic fiber. Arrange the cleaned phase change temperature-regulating acrylic fiber into parallel and straight fiber bundles, and then attach them to a metal sheet. Place the metal sheet in a plasma instrument and etch it in an air atmosphere. The etching conditions are: power range of 90W, air pressure of 20Pa, air flow rate of 10sccm, etching time of 15min, and etching depth of 5μm. After etching is completed, rinse the sample with deionized water to remove residual gas and by-products. After cleaning, place the sample in a drying oven to dry it to obtain etched phase change temperature-regulating acrylic fiber. Weigh out phase change microcapsules with a phase change temperature of 30℃, mix 20% of the phase change microcapsules with a phase change temperature of 30℃ with 3% of the binder to prepare phase change microcapsule solution C, immerse the etched phase change temperature-regulating acrylic fiber in solution C at a temperature of 40℃ for 50 minutes, and dry it at 80℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber A; Weigh out phase change microcapsules with a phase change temperature of 25℃, mix 30% of the phase change microcapsules with a phase change temperature of 25℃ and 5% of the binder to prepare phase change microcapsule solution D, immerse the etched phase change temperature-regulating acrylic fiber in solution D at a temperature of 30℃ for 50 minutes, and dry it in an environment of 70℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber B; Step 6: The moisture-permeable wool fiber, modified phase change temperature-regulating acrylic fiber, and heterogeneous core-sheath low-melting-point fiber are uniformly mixed through an opening machine and a cotton box, and then uniformly carded into a web by a carding machine. The web is then laid out by a web-laying machine with a thickness of 1 mm to obtain the temperature control layer 2. The mass proportions of the first top layer 5 in the temperature control layer 2 are 30% modified phase change temperature-regulating acrylic fiber, 55% moisture-permeable wool fiber, and 15% heterogeneous core-sheath low-melting-point fiber. The modified phase change temperature-regulating acrylic fiber in the first top layer 5 is modified phase change temperature-regulating acrylic fiber A, and its external microcapsule 8 has a phase change temperature of 30°C. The modified phase change temperature-regulating acrylic fiber in the first bottom layer 4 is modified phase change temperature-regulating acrylic fiber B, and its external microcapsule 8 has a phase change temperature of 25°C. The internal microcapsule 7 of the phase change temperature-regulating acrylic fiber has a phase change temperature of 15°C. Step 7: Prepare a sodium hypochlorite solution E with a mass percentage of 0.3%, adjust the pH of solution E to 2 using hydrochloric acid, and soak the wool fibers at a bath ratio of 1:15 for 15 minutes at room temperature to obtain chlorinated wool fibers. Prepare a mixed solution F containing 0.1% sodium carbonate and 0.05% sodium sulfite by mass percentage, adjust the pH of solution F to 9, add chlorinated wool fibers to solution F for dechlorination treatment, soak at room temperature for 40 minutes at a bath ratio of 1:15, then wash until neutral, and dry at 60℃ to obtain mercerized wool fibers. Step 8: Thoroughly pre-clean the kapok fibers to remove surface impurities. Immerse the pre-cleaned kapok fibers in a wool oil solution containing 5% owf at a liquor ratio of 1:7 to 1:10 for 40 minutes at room temperature. Remove the kapok fibers, clean and dry them. Mix the kapok fibers, mercerized wool fibers, and heterogeneous low-melting-point fibers through an opening machine and a cotton box. Card the mixture evenly into a web using a carding machine, and then lay it into a web with a thickness of 4mm using a web-laying machine. This results in a hollow thermal insulation layer 3. The second top layer 9 has the following mass percentages: kapok fiber 10%, mercerized wool fiber 75%, and heterogeneous low-melting-point fibers 15%. The middle layer 10 has the following mass percentages: kapok fiber 20%, mercerized wool fiber 65%, and heterogeneous low-melting-point fibers 15%. The second bottom layer 11 has the following mass percentages: kapok fiber 30%, mercerized wool fiber 55%, and heterogeneous low-melting-point fibers 15%. Step 9: Arrange the hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 in a manner that gradually moves away from the human body. The position of temperature-controlling layer 2 is rotated 45° relative to hydrophilic heat-releasing layer 1, and the position of hollow insulating layer 3 is rotated 90° relative to hydrophilic heat-releasing layer 1 and 45° relative to temperature-controlling layer 2. Use a pre-needling machine to pre-needle the arranged hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 at a needle density of 10 needles / cm². 2 The needle punching frequency is 5Hz, the needle punching depth is 15mm, the needle punching speed is 3m / min, and the needle punching angle is 90°. Hot air with a temperature range of 125℃ is used for fusion, in which the heterogeneous low melting point fibers of the core and sheath are evenly distributed between the layers for bonding. The fusion time is 8min. After the hot melt bonding is completed, a wool wadding sheet with temperature regulation, self-heating and long-lasting warmth is obtained.

[0025] Example 2 Step 1: Select wool fibers with a diameter of 24μm and an average length of 45mm; moisture-absorbing and heat-generating acrylic fibers with a diameter of 3dtex and an average length of 30mm; phase-change temperature-regulating acrylic fibers with a diameter of 4D, an average length of 45mm, and an enthalpy value of 30J; kapok fibers with a diameter of 32μm and an average length of 28mm; and heterogeneous core-sheath low-melting-point fibers with a diameter of 2D and an average length of 51mm as raw materials.

[0026] Step 2: Prepare a mixed solution A with a concentration of 2 g / L activator and 2 g / L alkaline protease. Adjust the pH of solution A to 11 and heat it in a water bath to 40°C. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution A and wool fiber to obtain pretreated wool fiber A. Wash the pretreated wool fiber A with water and heat it to 90°C to inactivate the alkaline protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60°C to obtain moisture-absorbing wool fiber. Step 3: Moisture-absorbing wool fiber, moisture-absorbing and heat-generating acrylic fiber, and heterogeneous low-melting-point fiber are uniformly mixed using an opening machine and a cotton box, and then uniformly carded into a web using a carding machine. The web is then laid out using a web-laying machine to a thickness of 1 mm, and a hydrophilic heat-releasing layer 1 is obtained by uniformly laying the web. The hydrophilic heat-releasing layer 1 has the following mass percentages: 60% moisture-absorbing wool fiber, 20% moisture-absorbing and heat-generating acrylic fiber, and 20% heterogeneous low-melting-point fiber. Step 4: Prepare a mixed solution B with a concentration of 1 g / L activator and 4 g / L acidic protease. Adjust the pH of solution B to 6 and heat it in a water bath to 60°C. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution B and wool fiber to obtain pretreated wool fiber B. Wash the pretreated wool fiber B with water and heat it to 80°C to inactivate the acidic protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 90°C to obtain breathable wool fiber. Step 5: Repeat the cleaning of the phase change temperature-regulating acrylic fiber three times with deionized water to remove impurities from the surface of the phase change temperature-regulating acrylic fiber. Arrange the cleaned phase change temperature-regulating acrylic fiber into parallel and straight fiber bundles, and then attach them to a metal sheet. Place the metal sheet in a plasma instrument and etch it in an air atmosphere. The etching conditions are: power range of 70W, air pressure of 50Pa, air flow rate of 15sccm, etching time of 1min, and etching depth of 1μm. After etching is completed, rinse the sample with deionized water to remove residual gas and by-products. After cleaning, place the sample in a drying oven to dry it to obtain etched phase change temperature-regulating acrylic fiber. Weigh out phase change microcapsules with a phase change temperature of 32℃, mix 30% of the phase change microcapsules with a phase change temperature of 32℃ with 5% of the binder to prepare phase change microcapsule solution C, immerse the etched phase change temperature-regulating acrylic fiber in solution C at a temperature of 30℃ for 90 minutes, and dry it at 90℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber A; Weigh out phase change microcapsules with a phase change temperature of 28℃, mix 40% of the phase change microcapsules with a phase change temperature of 28℃ and 3% of the binder to prepare phase change microcapsule solution D, immerse the etched phase change temperature-regulating acrylic fiber in solution D at a temperature of 50℃ for 90 minutes, and dry it at 60℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber B. Step 6: The moisture-permeable wool fiber, modified phase change temperature-regulating acrylic fiber, and heterogeneous core-sheath low-melting-point fiber are uniformly mixed through an opening machine and a cotton box, and then uniformly carded into a web by a carding machine. The web is then laid out by a web-laying machine with a thickness of 2 mm to obtain a temperature control layer 2. The mass proportions of the temperature control layer 2 are 40% modified phase change temperature-regulating acrylic fiber, 55% moisture-permeable wool fiber, and 5% heterogeneous core-sheath low-melting-point fiber. The modified phase change temperature-regulating acrylic fiber in the first top layer 5 is modified phase change temperature-regulating acrylic fiber A, and its external microcapsule 8 has a phase change temperature of 32℃. The modified phase change temperature-regulating acrylic fiber in the first bottom layer 4 is modified phase change temperature-regulating acrylic fiber B, and its external microcapsule 8 has a phase change temperature of 28℃. The internal microcapsule 7 of the phase change temperature-regulating acrylic fiber has a phase change temperature of 20℃. Step 7: Prepare a sodium hypochlorite solution E with a mass percentage of 0.2%, adjust the pH of solution E to 2.5 using hydrochloric acid, and soak the wool fibers at a bath ratio of 1:15 for 15 minutes at room temperature to obtain chlorinated wool fibers. Prepare a mixed solution F containing 0.3% sodium carbonate and 0.02% sodium sulfite by mass percentage, adjust the pH of solution F to 10, add chlorinated wool fibers to solution F for dechlorination treatment, soak at room temperature for 40 minutes at a bath ratio of 1:15, then wash until neutral, and dry at 60℃ to obtain mercerized wool fibers. Step 8: Thoroughly pre-clean the kapok fibers to remove surface impurities. Immerse the pre-cleaned kapok fibers in a wool oil solution containing 2% owf at a liquor ratio of 1:7 to 1:10 for 50 minutes at room temperature. Remove the kapok fibers, clean and dry them. Mix the kapok fibers, mercerized wool fibers, and heterogeneous low-melting-point fibers through an opening machine and a cotton box. Card the mixture evenly into a web using a carding machine, and then lay it into a web with a thickness of 5mm using a web-laying machine. This results in a hollow insulation layer 3. The second top layer 9 has the following mass percentages: kapok fiber 15%, mercerized wool fiber 80%, and heterogeneous low-melting-point fibers 5%. The middle layer 10 has the following mass percentages: kapok fiber 30%, mercerized wool fiber 65%, and heterogeneous low-melting-point fibers 5%. The second bottom layer 11 has the following mass percentages: kapok fiber 40%, mercerized wool fiber 55%, and heterogeneous low-melting-point fibers 5%. Step 9: Arrange the hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 in a manner that gradually moves away from the human body. The position of temperature-controlling layer 2 is rotated 45° relative to hydrophilic heat-releasing layer 1, and the position of hollow insulating layer 3 is rotated 90° relative to hydrophilic heat-releasing layer 1 and 45° relative to temperature-controlling layer 2. Use a pre-needling machine to pre-needle the arranged hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 at a needle density of 15 needles / cm². 2 The needle punching frequency is 15Hz, the needle punching depth is 5mm, the needle punching speed is 5m / min, and the needle punching angle is 60°. Hot air with a temperature range of 120℃ is used for fusion, in which the heterogeneous low melting point fibers of the core and sheath are evenly distributed between the layers for bonding. The fusion time is 10min. After the hot melt bonding is completed, a wool wadding sheet with temperature regulation, self-heating and long-lasting warmth is obtained.

[0027] Example 3 Step 1: Select wool fibers with a diameter of 17μm and an average length of 35mm; hygroscopic and heat-generating acrylic fibers with a diameter of 2.67dtex and an average length of 60mm; phase change temperature-regulating acrylic fibers with a diameter of 5D, an average length of 51mm, and an enthalpy of 40J; kapok fibers with a diameter of 20μm and an average length of 32mm; and heterogeneous core-sheath low-melting-point fibers with a diameter of 1.8D and an average length of 45mm as raw materials.

[0028] Step 2: Prepare a mixed solution A with a concentration of 1 g / L activator and 4 g / L alkaline protease. Adjust the pH of solution A to 10.5 and heat it to 60°C in a water bath. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution A and wool fiber to obtain pretreated wool fiber A. Wash the pretreated wool fiber A with water and heat it to 70°C to inactivate the alkaline protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60°C to obtain moisture-absorbing wool fiber. Step 3: Moisture-absorbing wool fiber, moisture-absorbing and heat-generating acrylic fiber, and heterogeneous low-melting-point fiber are uniformly mixed using an opening machine and a cotton box, and then uniformly carded into a web using a carding machine. The web is then laid out using a web-laying machine to a thickness of 2 mm, and a hydrophilic heat-releasing layer 1 is obtained by uniformly laying the web. The hydrophilic heat-releasing layer 1 has the following mass percentages: 70% moisture-absorbing wool fiber, 25% moisture-absorbing and heat-generating acrylic fiber, and 5% heterogeneous low-melting-point fiber. Step 4: Prepare a mixed solution B with a concentration of 2 g / L activator and 2 g / L acidic protease. Adjust the pH of solution B to 6.5 and heat it to 40°C in a water bath. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution B and wool fiber to obtain pretreated wool fiber B. Wash the pretreated wool fiber B with water and heat it to 70°C to inactivate the acidic protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60°C to obtain breathable wool fiber. Step 5: Repeat the cleaning of the phase change temperature-regulating acrylic fiber three times with deionized water to remove impurities on the surface of the phase change temperature-regulating acrylic fiber. Arrange the cleaned phase change temperature-regulating acrylic fiber into parallel and straight fiber bundles, and then attach them to a metal sheet. Place the metal sheet in a plasma instrument and etch it in an air atmosphere. The etching conditions are: power range of 300W, air pressure of 60Pa, air flow rate of 20sccm, etching time of 30min, and etching depth of 3μm. After etching is completed, rinse the sample with deionized water to remove residual gas and by-products. After cleaning, place the sample in a drying oven to dry it to obtain etched phase change temperature-regulating acrylic fiber. Weigh out phase change microcapsules with a phase change temperature of 35℃, mix 40% of the phase change microcapsules with a phase change temperature of 35℃ with 10% of the binder to prepare phase change microcapsule solution C, immerse the etched phase change temperature-regulating acrylic fiber in solution C at a temperature of 50℃ for 80 minutes, and dry it at 60℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber A. Weigh out phase change microcapsules with a phase change temperature of 30℃, mix 20% of the phase change microcapsules with a phase change temperature of 30℃ and 10% of the binder to prepare phase change microcapsule solution D, immerse the etched phase change temperature-regulating acrylic fiber in solution D at a temperature of 40℃ for 70 minutes, and dry it in an environment of 90℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber B. Step 6: The moisture-permeable wool fiber, modified phase change temperature-regulating acrylic fiber, and heterogeneous core-sheath low-melting-point fiber are uniformly mixed through an opening machine and a cotton box, and then uniformly combed into a web by a carding machine. The web is then laid out by a web-laying machine with a thickness of 4 mm to obtain the temperature control layer 2. The mass proportions of the temperature control layer 2 are 20% modified phase change temperature-regulating acrylic fiber, 55% moisture-permeable wool fiber, and 25% heterogeneous core-sheath low-melting-point fiber. The modified phase change temperature-regulating acrylic fiber in the first top layer 5 is modified phase change temperature-regulating acrylic fiber A, and its external microcapsule 8 has a phase change temperature of 35°C. The modified phase change temperature-regulating acrylic fiber in the first bottom layer 4 is modified phase change temperature-regulating acrylic fiber B, and its external microcapsule 8 has a phase change temperature of 30°C. The internal microcapsule 7 of the phase change temperature-regulating acrylic fiber has a phase change temperature of 25°C. Step 7: Prepare a sodium hypochlorite solution E with a mass percentage of 0.5%, adjust the pH of solution E to 3 using hydrochloric acid, and soak the wool fibers at a bath ratio of 1:15 for 15 minutes at room temperature to obtain chlorinated wool fibers. Prepare a mixed solution F containing 0.2% sodium carbonate and 0.07% sodium sulfite by mass percentage, adjust the pH of solution F to 9.5, add chlorinated wool fibers to solution F for dechlorination treatment, soak at room temperature for 40 minutes at a bath ratio of 1:15, then wash until neutral, and dry at 60℃ to obtain mercerized wool fibers. Step 8: Thoroughly pre-clean the kapok fibers to remove surface impurities. Immerse the pre-cleaned kapok fibers in a wool oil solution containing 6% owf at a liquor ratio of 1:7 to 1:10 for 30 minutes at room temperature. Remove the kapok fibers, clean and dry them. Mix the kapok fibers, mercerized wool fibers, and heterogeneous low-melting-point fibers through an opening machine and a cotton box. Card the mixture evenly into a web using a carding machine, and then lay it into a web with a thickness of 6mm using a web-laying machine. This results in a hollow insulation layer 3. The second top layer 9 has the following mass percentages: 20% kapok fiber, 60% mercerized wool fiber, and 20% heterogeneous low-melting-point fibers. The middle layer 10 has the following mass percentages: 25% kapok fiber, 50% mercerized wool fiber, and 25% heterogeneous low-melting-point fibers. The second bottom layer 11 has the following mass percentages: 30% kapok fiber, 40% mercerized wool fiber, and 30% heterogeneous low-melting-point fibers. Step 9: Arrange the hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 in a manner that gradually moves away from the human body. The position of temperature-controlling layer 2 is rotated 45° relative to hydrophilic heat-releasing layer 1, and the position of hollow insulating layer 3 is rotated 90° relative to hydrophilic heat-releasing layer 1 and 45° relative to temperature-controlling layer 2. Use a pre-needling machine to pre-needle the arranged hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 at a needle density of 30 needles / cm². 2 The needle punching frequency is 3Hz, the needle punching depth is 10mm, the needle punching speed is 1m / min, and the needle punching angle is 80°. Hot air with a temperature range of 150℃ is used for fusion, in which the heterogeneous low melting point fibers of the core and sheath are evenly distributed between the layers for bonding. The fusion time is 2min. After the hot melt bonding is completed, a wool wadding sheet with temperature regulation, self-heating and long-lasting warmth is obtained.

[0029] Example 4 Step 1: Select wool fibers with a diameter of 22μm and an average length of 40mm; hygroscopic and heat-generating acrylic fibers with a diameter of 2.67dtex and an average length of 51mm; phase change temperature-regulating acrylic fibers with a diameter of 4D, an average length of 51mm, and an enthalpy of 40J; kapok fibers with a diameter of 30μm and an average length of 20mm; and heterogeneous core-sheath low-melting-point fibers with a diameter of 1.5D and an average length of 38mm as raw materials.

[0030] Step 2: Prepare a mixed solution A with a concentration of 2 g / L activator and 2 g / L alkaline protease. Adjust the pH of solution A to 11 and heat it in a water bath to 40°C. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution A and wool fiber to obtain pretreated wool fiber A. Wash the pretreated wool fiber A with water and heat it to 90°C to inactivate the alkaline protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60°C to obtain moisture-absorbing wool fiber. Step 3: Moisture-absorbing wool fiber, moisture-absorbing and heat-generating acrylic fiber, and heterogeneous low-melting-point fiber are uniformly mixed using an opening machine and a cotton box, and then uniformly carded into a web using a carding machine. The web is then laid out using a web-laying machine to a thickness of 2 mm, and a hydrophilic heat-releasing layer 1 is obtained by uniformly laying the web. The hydrophilic heat-releasing layer 1 has the following mass percentages: 50% moisture-absorbing wool fiber, 20% moisture-absorbing and heat-generating acrylic fiber, and 30% heterogeneous low-melting-point fiber. Step 4: Prepare a mixed solution B with a concentration of 3 g / L activator and 3 g / L acidic protease. Adjust the pH of solution B to 5.5 and heat it to 50°C in a water bath. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution B and wool fiber to obtain pretreated wool fiber B. Wash the pretreated wool fiber B with water and heat it to 80°C to inactivate the acidic protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60°C to obtain breathable wool fiber. Step 5: Repeat the cleaning of the phase change temperature-regulating acrylic fiber three times with deionized water to remove impurities on the surface of the phase change temperature-regulating acrylic fiber. Arrange the cleaned phase change temperature-regulating acrylic fiber into parallel and straight fiber bundles, and then attach them to a metal sheet. Place the metal sheet in a plasma instrument and etch it in an air atmosphere. The etching conditions are: power range of 150W, air pressure of 20Pa, air flow rate of 10sccm, etching time of 15min, and etching depth of 5μm. After etching is completed, rinse the sample with deionized water to remove residual gas and by-products. After cleaning, place the sample in a drying oven to dry it to obtain etched phase change temperature-regulating acrylic fiber. Weigh out phase change microcapsules with a phase change temperature of 35℃, mix 20% of the phase change microcapsules with a phase change temperature of 35℃ with 3% of the binder to prepare phase change microcapsule solution C, immerse the etched phase change temperature-regulating acrylic fiber in solution C at a temperature of 40℃ for 50 minutes, and dry it at 80℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber A; Weigh out phase change microcapsules with a phase change temperature of 25℃, mix 30% of the phase change microcapsules with a phase change temperature of 25℃ and 5% of the binder to prepare phase change microcapsule solution D, immerse the etched phase change temperature-regulating acrylic fiber in solution D at a temperature of 30℃ for 50 minutes, and dry it in an environment of 70℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber B; Step 6: The moisture-permeable wool fiber, modified phase change temperature-regulating acrylic fiber, and heterogeneous core-sheath low-melting-point fiber are uniformly mixed through an opening machine and a cotton box, and then uniformly combed into a web by a carding machine. The web is then laid out by a web-laying machine with a thickness of 3mm to obtain the temperature control layer 2. The mass proportions of the temperature control layer 2 are 30% modified phase change temperature-regulating acrylic fiber, 50% moisture-permeable wool fiber, and 20% heterogeneous core-sheath low-melting-point fiber. The modified phase change temperature-regulating acrylic fiber in the first top layer 5 is modified phase change temperature-regulating acrylic fiber A, and its external microcapsule 8 has a phase change temperature of 35℃. The modified phase change temperature-regulating acrylic fiber in the first bottom layer 4 is modified phase change temperature-regulating acrylic fiber B, and its external microcapsule 8 has a phase change temperature of 25℃. The phase change temperature-regulating acrylic fiber internal microcapsule 7 has a phase change temperature of 15℃. Step 7: Prepare a sodium hypochlorite solution E with a mass percentage of 0.3%, adjust the pH of solution E to 2 using hydrochloric acid, and soak the wool fibers at a bath ratio of 1:15 for 15 minutes at room temperature to obtain chlorinated wool fibers. Prepare a mixed solution F containing 0.1% sodium carbonate and 0.05% sodium sulfite by mass percentage, adjust the pH of solution F to 9, add chlorinated wool fibers to solution F for dechlorination treatment, soak at room temperature for 40 minutes at a bath ratio of 1:15, then wash until neutral, and dry at 60℃ to obtain mercerized wool fibers. Step 8: Thoroughly pre-clean the kapok fibers to remove surface impurities. Immerse the pre-cleaned kapok fibers in a wool oil solution containing 5% owf at a liquor ratio of 1:7 to 1:10 for 40 minutes at room temperature. Remove the kapok fibers, clean and dry them. Mix the kapok fibers, mercerized wool fibers, and heterogeneous low-melting-point fibers through an opening machine and a cotton box. Card the mixture evenly into a web using a carding machine, and then lay it into a web with a thickness of 8mm using a web-laying machine. This results in a hollow insulation layer 3. The second top layer 9 contains 10% kapok fiber, 60% mercerized wool fiber, and 30% heterogeneous low-melting-point fibers. The middle layer 10 contains 20% kapok fiber, 70% mercerized wool fiber, and 10% heterogeneous low-melting-point fibers. The second bottom layer 11 contains 35% kapok fiber, 60% mercerized wool fiber, and 5% heterogeneous low-melting-point fibers. Step 9: Arrange the hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 in a manner that gradually moves away from the human body. The position of temperature-controlling layer 2 is rotated 45° relative to hydrophilic heat-releasing layer 1, and the position of hollow insulating layer 3 is rotated 90° relative to hydrophilic heat-releasing layer 1 and 45° relative to temperature-controlling layer 2. Use a pre-needling machine to pre-needle the arranged hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 at a needle density of 50 needles / cm². 2The needle punching frequency is 5Hz, the needle punching depth is 15mm, the needle punching speed is 3m / min, and the needle punching angle is 90°. Hot air with a temperature range of 125℃ is used for fusion, in which the heterogeneous low melting point fibers of the core and sheath are evenly distributed between the layers for bonding. The fusion time is 8min. After the hot melt bonding is completed, a wool wadding sheet with temperature regulation, self-heating and long-lasting warmth is obtained.

[0031] Example 5 Step 1: Select wool fibers with a diameter of 18μm and an average length of 35mm; hygroscopic and heat-generating acrylic fibers with a diameter of 2.67dtex and an average length of 38mm; phase change temperature-regulating acrylic fibers with a diameter of 4D, an average length of 51mm, and an enthalpy of 40J; kapok fibers with a diameter of 30μm and an average length of 20mm; and heterogeneous core-sheath low-melting-point fibers with a diameter of 1.5D and an average length of 38mm as raw materials.

[0032] Step 2: Prepare a mixed solution A with a concentration of 1 g / L activator and 4 g / L alkaline protease. Adjust the pH of solution A to 10.5 and heat it to 60°C in a water bath. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution A and wool fiber to obtain pretreated wool fiber A. Wash the pretreated wool fiber A with water and heat it to 70°C to inactivate the alkaline protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60°C to obtain moisture-absorbing wool fiber. Step 3: Moisture-absorbing wool fiber, moisture-absorbing and heat-generating acrylic fiber, and heterogeneous low-melting-point fiber are uniformly mixed using an opening machine and a cotton box, and then uniformly carded into a web using a carding machine. The web is then laid out using a web-laying machine to a thickness of 1 mm, and a hydrophilic heat-releasing layer 1 is obtained by uniformly laying the web. The hydrophilic heat-releasing layer 1 has the following mass percentages: 55% moisture-absorbing wool fiber, 40% moisture-absorbing and heat-generating acrylic fiber, and 5% heterogeneous low-melting-point fiber. Step 4: Prepare a mixed solution B with a concentration of 3 g / L activator and 3 g / L acidic protease. Adjust the pH of solution B to 5.5 and heat it to 50°C in a water bath. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution B and wool fiber to obtain pretreated wool fiber B. Wash the pretreated wool fiber B with water and heat it to 80°C to inactivate the acidic protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60°C to obtain breathable wool fiber. Step 5: Repeat the cleaning of the phase change temperature-regulating acrylic fiber three times with deionized water to remove impurities on the surface of the phase change temperature-regulating acrylic fiber. Arrange the cleaned phase change temperature-regulating acrylic fiber into parallel and straight fiber bundles, and then attach them to a metal sheet. Place the metal sheet in a plasma instrument and etch it in an air atmosphere. The etching conditions are: power range of 90W, air pressure of 20Pa, air flow rate of 10sccm, etching time of 15min, and etching depth of 5μm. After etching is completed, rinse the sample with deionized water to remove residual gas and by-products. After cleaning, place the sample in a drying oven to dry it to obtain etched phase change temperature-regulating acrylic fiber. Weigh out phase change microcapsules with a phase change temperature of 35℃, mix 20% of the 35℃ phase change microcapsules with 3% of the binder to prepare phase change microcapsule solution C, immerse the etched phase change temperature-regulating acrylic fiber in solution C at a temperature of 40℃ for 50 minutes, and dry it at 80℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber A. Weigh out phase change microcapsules with a phase change temperature of 28℃, mix 30% of the phase change microcapsules with a phase change temperature of 28℃ and 5% of the binder to prepare phase change microcapsule solution D, immerse the etched phase change temperature-regulating acrylic fiber in solution D at a temperature of 30℃ for 50 minutes, and dry it in an environment of 70℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber B; Step 6: The moisture-permeable wool fiber, modified phase change temperature-regulating acrylic fiber, and heterogeneous core-sheath low-melting-point fiber are uniformly mixed through an opening machine and a cotton box, and then uniformly combed into a web by a carding machine. The web is then laid out by a web-laying machine with a thickness of 3 mm to obtain the temperature control layer 2. The mass proportions of the temperature control layer 2 are 10% modified phase change temperature-regulating acrylic fiber, 70% moisture-permeable wool fiber, and 20% heterogeneous core-sheath low-melting-point fiber. The modified phase change temperature-regulating acrylic fiber in the first top layer 5 is modified phase change temperature-regulating acrylic fiber A, and its external microcapsule 8 has a phase change temperature of 35℃. The modified phase change temperature-regulating acrylic fiber in the first bottom layer 4 is modified phase change temperature-regulating acrylic fiber B, and its external microcapsule 8 has a phase change temperature of 28℃. The internal microcapsule 7 of the phase change temperature-regulating acrylic fiber has a phase change temperature of 20℃. Step 7: Prepare a sodium hypochlorite solution E with a mass percentage of 0.3%, adjust the pH of solution E to 2 using hydrochloric acid, and soak the wool fibers at a bath ratio of 1:15 for 15 minutes at room temperature to obtain chlorinated wool fibers. Prepare a mixed solution F containing 0.1% sodium carbonate and 0.05% sodium sulfite by mass percentage, adjust the pH of solution F to 9, add chlorinated wool fibers to solution F for dechlorination treatment, soak at room temperature for 40 minutes at a bath ratio of 1:15, then wash until neutral, and dry at 60℃ to obtain mercerized wool fibers. Step 8: Thoroughly pre-clean the kapok fibers to remove surface impurities. Immerse the pre-cleaned kapok fibers in a wool oil solution containing 5% owf at a liquor ratio of 1:7 to 1:10 for 40 minutes at room temperature. Remove the kapok fibers, clean and dry them. Mix the kapok fibers, mercerized wool fibers, and heterogeneous low-melting-point fibers through an opening machine and a cotton box. Card the mixture evenly into a web using a carding machine, and then lay it into a web with a thickness of 5mm using a web-laying machine. This results in a hollow insulation layer 3. The second top layer 9 has the following mass percentages: kapok fiber 10%, mercerized wool fiber 60%, and heterogeneous low-melting-point fibers 30%. The middle layer 10 has the following mass percentages: kapok fiber 20%, mercerized wool fiber 50%, and heterogeneous low-melting-point fibers 30%. The second bottom layer 11 has the following mass percentages: kapok fiber 35%, mercerized wool fiber 60%, and heterogeneous low-melting-point fibers 5%. Step 9: Arrange the hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 in a manner that gradually moves away from the human body. The position of temperature-controlling layer 2 is rotated 45° relative to hydrophilic heat-releasing layer 1, and the position of hollow insulating layer 3 is rotated 90° relative to hydrophilic heat-releasing layer 1 and 45° relative to temperature-controlling layer 2. Use a pre-needling machine to pre-needle the arranged hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 at a needle density of 10 needles / cm². 2 The needle punching frequency is 5Hz, the needle punching depth is 15mm, the needle punching speed is 3m / min, and the needle punching angle is 90°. Hot air with a temperature range of 125℃ is used for fusion, in which the heterogeneous low melting point fibers of the core and sheath are evenly distributed between the layers for bonding. The fusion time is 8min. After the hot melt bonding is completed, a wool wadding sheet with temperature regulation, self-heating and long-lasting warmth is obtained.

[0033] Example 6 Step 1: Select wool fibers with a diameter of 24μm and an average length of 51mm; moisture-absorbing and heat-generating acrylic fibers with a diameter of 3dtex and an average length of 38mm; phase-change temperature-regulating acrylic fibers with a diameter of 1.5D, an average length of 45mm, and an enthalpy value of 30J; kapok fibers with a diameter of 32μm and an average length of 20mm; and heterogeneous core-sheath low-melting-point fibers with a diameter of 2D and an average length of 51mm as raw materials.

[0034] Step 2: Prepare a mixed solution A with a concentration of 3 g / L activator and 3 g / L alkaline protease. Adjust the pH of solution A to 10 and heat it to 50°C in a water bath. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution A and wool fiber to obtain pretreated wool fiber A. Wash the pretreated wool fiber A with water and heat it to 80°C to inactivate the alkaline protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60°C to obtain moisture-absorbing wool fiber. Step 3: Moisture-absorbing wool fiber, moisture-absorbing and heat-generating acrylic fiber, and heterogeneous low-melting-point fiber are uniformly mixed using an opening machine and a cotton box, and then uniformly carded into a web using a carding machine. The web is then laid out using a web-laying machine to a thickness of 2 mm, and a hydrophilic heat-releasing layer 1 is obtained by uniformly laying the web. The hydrophilic heat-releasing layer 1 has the following mass percentages: 50% moisture-absorbing wool fiber, 30% moisture-absorbing and heat-generating acrylic fiber, and 20% heterogeneous low-melting-point fiber. Step 4: Prepare a mixed solution B with a concentration of 2 g / L activator and 2 g / L acidic protease. Adjust the pH of solution B to 6.5 and heat it to 40°C in a water bath. Then, keep it at this temperature for 30 minutes with a bath ratio of 1:20 between solution B and wool fiber to obtain pretreated wool fiber B. Wash the pretreated wool fiber B with water and heat it to 70°C to inactivate the acidic protease. After inactivation, wash it again to remove residues. Finally, dry it in a hot air environment at 60°C to obtain breathable wool fiber. Step 5: Repeat the cleaning of the phase change temperature-regulating acrylic fiber three times with deionized water to remove impurities on the surface of the phase change temperature-regulating acrylic fiber. Arrange the cleaned phase change temperature-regulating acrylic fiber into parallel and straight fiber bundles, and then attach them to a metal sheet. Place the metal sheet in a plasma instrument and etch it in an air atmosphere. The etching conditions are: power range of 200W, air pressure of 20Pa, air flow rate of 10sccm, etching time of 15min, and etching depth of 5μm. After etching is completed, rinse the sample with deionized water to remove residual gas and by-products. After cleaning, place the sample in a drying oven to dry it to obtain etched phase change temperature-regulating acrylic fiber. Weigh out phase change microcapsules with a phase change temperature of 35℃, mix 20% of the phase change microcapsules with a phase change temperature of 35℃ with 3% of the binder to prepare phase change microcapsule solution C, immerse the etched phase change temperature-regulating acrylic fiber in solution C at a temperature of 40℃ for 50 minutes, and dry it at 80℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber A; Weigh out phase change microcapsules with a phase change temperature of 28℃, mix 30% of the phase change microcapsules with a phase change temperature of 28℃ and 5% of the binder to prepare phase change microcapsule solution D, immerse the etched phase change temperature-regulating acrylic fiber in solution D at a temperature of 30℃ for 50 minutes, and dry it in an environment of 70℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber B; Step 6: The moisture-permeable wool fiber, modified phase change temperature-regulating acrylic fiber, and heterogeneous core-sheath low-melting-point fiber are uniformly mixed through an opening machine and a cotton box, and then uniformly combed into a web by a carding machine. The web is then laid out by a web-laying machine with a thickness of 3 mm to obtain the temperature control layer 2. The mass proportions of the temperature control layer 2 are 20% modified phase change temperature-regulating acrylic fiber, 50% moisture-permeable wool fiber, and 30% heterogeneous core-sheath low-melting-point fiber. The modified phase change temperature-regulating acrylic fiber in the first top layer 5 is modified phase change temperature-regulating acrylic fiber A, and its external microcapsule 8 has a phase change temperature of 35°C. The modified phase change temperature-regulating acrylic fiber in the first bottom layer 4 is modified phase change temperature-regulating acrylic fiber B, and its external microcapsule 8 has a phase change temperature of 28°C. The internal microcapsule 7 of the phase change temperature-regulating acrylic fiber has a phase change temperature of 15°C. Step 7: Prepare a sodium hypochlorite solution E with a mass percentage of 0.3%, adjust the pH of solution E to 2 using hydrochloric acid, and soak the wool fibers at a bath ratio of 1:15 for 15 minutes at room temperature to obtain chlorinated wool fibers. Prepare a mixed solution F containing 0.1% sodium carbonate and 0.05% sodium sulfite by mass percentage, adjust the pH of solution F to 9, add chlorinated wool fibers to solution F for dechlorination treatment, soak at room temperature for 40 minutes at a bath ratio of 1:15, then wash until neutral, and dry at 60℃ to obtain mercerized wool fibers. Step 8: Thoroughly pre-clean the kapok fibers to remove surface impurities. Immerse the pre-cleaned kapok fibers in a wool oil solution containing 5% owf at a liquor ratio of 1:7 to 1:10 for 40 minutes at room temperature. Remove the kapok fibers, clean and dry them. Mix the kapok fibers, mercerized wool fibers, and heterogeneous low-melting-point fibers through an opening machine and a cotton box. Card the mixture evenly into a web using a carding machine, and then lay it into a web with a thickness of 8mm using a web-laying machine. This results in a hollow insulation layer 3. The second top layer 9 contains 10% kapok fiber, 60% mercerized wool fiber, and 30% heterogeneous low-melting-point fibers. The middle layer 10 contains 20% kapok fiber, 70% mercerized wool fiber, and 10% heterogeneous low-melting-point fibers. The second bottom layer 11 contains 35% kapok fiber, 60% mercerized wool fiber, and 5% heterogeneous low-melting-point fibers. Step 9: Arrange the hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 in a manner that gradually moves away from the human body. The position of temperature-controlling layer 2 is rotated 45° relative to hydrophilic heat-releasing layer 1, and the position of hollow insulating layer 3 is rotated 90° relative to hydrophilic heat-releasing layer 1 and 45° relative to temperature-controlling layer 2. Use a pre-needling machine to pre-needle the arranged hydrophilic heat-releasing layer 1, temperature-controlling layer 2, and hollow insulating layer 3 at a needle density of 20 needles / cm². 2The needle punching frequency is 5Hz, the needle punching depth is 15mm, the needle punching speed is 3m / min, and the needle punching angle is 90°. Hot air with a temperature range of 125℃ is used for fusion, in which the heterogeneous low melting point fibers of the core and sheath are evenly distributed between the layers for bonding. The fusion time is 8min. After the hot melt bonding is completed, a wool wadding sheet with temperature regulation, self-heating and long-lasting warmth is obtained.

Claims

1. A method for preparing a temperature-regulating, self-heating, and long-lasting warm wool wadding, characterized in that, The specific steps are as follows: Step 1: Select wool fiber, moisture-absorbing and heat-generating acrylic fiber, phase change temperature-regulating acrylic fiber, kapok fiber, and heterogeneous low-melting-point fiber as raw materials. Step 2: Treat the wool fibers with an alkaline enzyme to obtain moisture-absorbing wool fibers; Step 3: The moisture-absorbing wool fiber, moisture-absorbing and heat-generating acrylic fiber and the sheath-core heterogeneous low-melting-point fiber are combed and laid into a web to obtain a hydrophilic heat-releasing layer (1). Step 4: Treat the wool fibers with acidic enzymes to obtain moisture-permeable wool fibers; Step 5: Perform plasma etching on the phase change temperature-regulating acrylic fiber to obtain etched phase change temperature-regulating acrylic fiber; prepare a phase change microcapsule solution, immerse the etched phase change temperature-regulating acrylic fiber in the phase change microcapsule solution to obtain modified phase change temperature-regulating acrylic fiber. Step 6: The moisture-permeable wool fiber, modified phase change temperature-regulating acrylic fiber and sheath-core heterogeneous low-melting-point fiber are combed and laid into a web to obtain the temperature control layer (2). Step 7: Chlorinate and dechlorinate the wool fibers to obtain mercerized wool fibers; Step 8: Comb and lay the kapok fiber, mercerized wool fiber and sheath-core heterogeneous low melting point fiber into a web to obtain a hollow insulation layer (3). Step 9: The water-release heat layer (1), temperature control layer (2) and hollow heat insulation layer (3) are pre-needled and then hot-melted bonded to obtain a wool wadding sheet with temperature regulation, self-heating and long-lasting warmth. The alkaline enzyme treatment specifically involves preparing a mixed solution A with a concentration of 1-3 g / L activator and 2-4 g / L alkaline protease, adjusting the pH of solution A to 10-11, heating it in a water bath to 40-60°C, and then keeping it at a bath ratio of 1:20 to wool fiber for 30 minutes to obtain pretreated wool fiber A. After washing the pretreated wool fiber A with water, it is heated to 70-90℃ to inactivate alkaline protease. After inactivation, it is washed again to remove the residue. Finally, it is dried in a hot air environment at 60℃ to obtain moisture-absorbing wool fiber. The acidic enzyme treatment specifically involves preparing a mixed solution B with a concentration of 1-3 g / L activator and 2-4 g / L acidic protease, adjusting the pH of solution B to 5.5-6.5, heating it in a water bath to 40-60°C, and then keeping it at a bath ratio of 1:20 with wool fibers for 30 minutes to obtain pretreated wool fibers B. After washing the pretreated wool fiber B with water, heat it to 70-90℃ to inactivate the acidic protease. After inactivation, wash it again to remove the residue. Finally, dry it in a hot air environment at 60℃ to obtain the moisture-permeable wool fiber. The structure of the temperature-regulating, self-heating and long-lasting warm wool wadding includes, from bottom to top, a hydrophilic heat-releasing layer (1), a temperature control layer (2), and a hollow heat-insulating layer (3). The position of the temperature control layer (2) is rotated 45° relative to the hydrophilic heat-releasing layer (1). The position of the hollow heat-insulating layer (3) is rotated 90° relative to the hydrophilic heat-releasing layer (1) and 45° relative to the temperature control layer (2). The temperature control layer (2) includes, from top to bottom, a first top layer (5) and a first bottom layer (4). The hollow heat-insulating layer (3) includes, from top to bottom, a second top layer (9), a middle layer (10), and a second bottom layer (11).

2. The method for preparing the temperature-regulating, self-heating, and long-lasting warm wool wadding according to claim 1, characterized in that, The raw materials include wool fibers with a diameter of 17-30 μm and an average length of 35-51 mm; hygroscopic and heat-generating acrylic fibers with a diameter of 2-3 dtex and an average length of 30-60 mm; phase-change temperature-regulating acrylic fibers with a diameter of 1.5-5 D, an average length of 38-51 mm, and an enthalpy value of 15-40 J; kapok fibers with a diameter of 30-36 μm and an average length of 20-32 mm; and core-sheath heterogeneous low-melting-point fibers with a diameter of 1.5-2 D and an average length of 38-51 mm.

3. The method for preparing the temperature-regulating, self-heating, and long-lasting warm wool wadding according to claim 1, characterized in that, Step 5 specifically involves: Step 501: Use deionized water to repeatedly wash the phase change temperature-regulating acrylic fiber 2-5 times to remove impurities from the surface of the phase change temperature-regulating acrylic fiber. Step 502: The cleaned phase change temperature-regulating acrylic fibers are arranged into parallel and straight fiber bundles, then attached to a metal sheet. The metal sheet is placed in a plasma instrument and etched in an air atmosphere. The etching conditions are: power range of 70-300W, air pressure of 20-65Pa, air flow rate of 10-20sccm, etching time of 1-30min, and etching depth of 1-5μm. After etching is completed, the sample is rinsed with deionized water to remove residual gas and by-products. After cleaning, the sample is placed in a drying oven for drying to obtain etched phase change temperature-regulating acrylic fibers. Step 503: Weigh phase change microcapsules with a phase change temperature of 30-35℃, mix 20-40% of the phase change microcapsules with a phase change temperature of 30-35℃ with 3-10% of the binder to prepare phase change microcapsule solution C, immerse the etched phase change temperature-regulating acrylic fiber in solution C at a temperature of 30-50℃ for 50-90 minutes, and dry it in an environment of 60-90℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber A; Step 504: Weigh phase change microcapsules with a phase change temperature of 25-30℃, mix 20-40% of the phase change microcapsules with a phase change temperature of 25-30℃ and 3-10% of the binder to prepare phase change microcapsule solution D, immerse the etched phase change temperature-regulating acrylic fiber in solution D at a temperature of 30-50℃ for 50-90 minutes, and dry it in an environment of 60-90℃ after immersion to obtain modified phase change temperature-regulating acrylic fiber B.

4. The method for preparing the temperature-regulating, self-heating, and long-lasting warm wool wadding according to claim 3, characterized in that, The hydrophilic heat-releasing layer (1) contains 50-70% moisture-absorbing wool fiber, 20-40% moisture-absorbing and heat-generating acrylic fiber, and 5-30% heterogeneous low-melting-point fiber. The temperature control layer (2) contains 20-40% modified phase change temperature-regulating acrylic fiber, 50-70% moisture-permeable wool fiber, and 5-30% heterogeneous low-melting-point fiber; the temperature control layer (2) includes a first top layer (5) and a first bottom layer (4) from top to bottom, and the first top layer (5) is the side away from the human body; The hollow insulation layer (3) includes a second top layer (9), a middle layer (10), and a second bottom layer (11) from top to bottom. The second top layer (9) is the side away from the human body, and its mass percentages are 10-20% kapok fiber, 60-80% mercerized wool fiber, and 5-30% heterogeneous low-melting-point fiber. The middle layer (10) has a mass percentage of 20-30% kapok fiber, 50-70% mercerized wool fiber, and 5-30% heterogeneous low-melting-point fiber. The second bottom layer (11) has a mass percentage of 30-40% kapok fiber, 40-60% mercerized wool fiber, and 5-30% heterogeneous low-melting-point fiber.

5. The method for preparing the temperature-regulating, self-heating, and long-lasting warm wool wadding according to claim 4, characterized in that, The modified phase change temperature-regulating acrylic fiber in the first top layer (5) is modified phase change temperature-regulating acrylic fiber A, and its phase change microcapsule phase change temperature is 30-35℃. The modified phase change temperature-regulating acrylic fiber in the first bottom layer (4) is modified phase change temperature-regulating acrylic fiber B, and its phase change microcapsule phase change temperature is 25-30℃. The phase change microcapsule has a core material of high-purity n-alkane paraffin and a shell material of polymethyl methacrylate or polyurethane.

6. The method for preparing the temperature-regulating, self-heating, and long-lasting warm wool wadding according to claim 1, characterized in that, Step 7 specifically involves: Step 701: Prepare a sodium hypochlorite solution E with a mass percentage of 0.2-0.5%, adjust the pH of solution E to 2-3 using hydrochloric acid, and soak wool fibers at a bath ratio of 1:15 for 15 minutes at room temperature to obtain chlorinated wool fibers. Step 702: Prepare a mixed solution F of sodium carbonate and sodium sulfite with a mass percentage of 0.1-0.3% and 0.02-0.07%, adjust the pH of solution F to 9-10, add chlorinated wool fibers to solution F for dechlorination treatment, soak at room temperature for 40 minutes at a bath ratio of 1:15, then wash until neutral, and dry at 60°C to obtain mercerized wool fibers.

7. The method for preparing the temperature-regulating, self-heating, and long-lasting warm wool wadding according to claim 1, characterized in that, Step 9 specifically involves: Step 901: Arrange the hydrophilic heat release layer (1), the temperature control layer (2), and the hollow heat insulation layer (3) in a way that gradually moves away from the human body. The thickness ratio of the hydrophilic heat release layer (1) to the temperature control layer (2) is 1:1-3, and the thickness ratio of the hydrophilic heat release layer (1) to the hollow heat insulation layer (3) is 1:2-5. The position of the temperature control layer (2) is rotated 45° relative to the hydrophilic heat release layer (1), and the position of the hollow heat insulation layer (3) is rotated 90° relative to the hydrophilic heat release layer (1) and 45° relative to the temperature control layer (2). Step 902: Use a pre-needling machine to pre-needle the arranged hydrophilic heat release layer (1), temperature control layer (2) and hollow heat insulation layer (3). The needle density is 10-50 needles / cm2, the needle frequency is 3-15Hz, the needle depth is 5-15mm, the needle speed is 1-5m / min, and the needle angle is 60-90°. Step 903: Use hot air with a temperature range of 120℃-150℃ to fuse the fibers for 2-10 minutes. After the hot melt bonding is completed, a temperature-regulating, self-heating, and long-lasting warm wool wadding is obtained.

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