Temperature-control self-heating wool flocculus thermal insulation material and preparation process thereof

Abstract

The preparation process comprises the following steps: carding and lapping enzyme-treated moisture-permeable wool fibers, waterproof breathable phase-change temperature-adjusting acrylic fibers and water-soluble fibers to prepare an anti-permeable temperature-control flocculus, removing the water-soluble fibers in the anti-permeable temperature-control flocculus, filling pores with polyurethane foam to prepare an anti-permeable temperature-control layer, and drying the anti-permeable temperature-control layer to obtain the temperature-control self-heating wool flocculus warm-keeping material. Polylactic acid and phase change microcapsules are dissolved in a solvent, a superfine fiber supporting layer is woven through electrostatic spinning, mercerized wool fibers, hollow antibacterial heating filaments and double-component skin-core heterogeneous low-melting-point fibers soaked with a low-melting-point polyethylene solution are mixed, a hollow antibacterial heating layer is prepared, and the hollow antibacterial heating layer is woven into the hollow antibacterial heating layer. The upper layer of the anti-permeable temperature control layer and the bottom layer of the hollow antibacterial heating layer are coated with a low-melting-point polyethylene solution, and the anti-permeable temperature control layer, the superfine fiber supporting layer and the hollow antibacterial heating layer are stacked layer by layer and then are subjected to hot melting bonding and stitch bonding fixing. The thermal insulation material prepared by the invention integrates temperature control, self-heating and antibacterial properties, and can automatically adjust the body temperature according to the environment temperature change.

Description

Technical Field

[0001] The invention belongs to the technical field of textile materials, and relates to a temperature-controlled self-heating wool flake thermal insulation material and a preparation process thereof. Background Art

[0002] With the continuous advancement of science and technology, people's requirements for wearing comfort and functionality are gradually increasing, and the research and development of thermal insulation materials are gradually developing in the direction of intelligence and functionality. Thermal insulation materials will lock in as much air as possible, slowing down the convection between the hot air between the fibers and the cold air outside, avoiding the heat being taken away.

[0003] Common thermal insulation materials are mainly divided into natural thermal insulation fibers, hollow fibers, and fine-denier polypropylene. Natural thermal insulation fibers include down, cashmere, wool, and cotton. Currently, down is the best material for thermal insulation. Down is a reed-shaped down. Each down fiber can be seen to be fish-scale-shaped under a magnifying glass. There are countless tiny pores, which contain a large amount of still air. Since the air conductivity coefficient is the lowest, down has good thermal insulation. There are about 2 million filaments in one ounce of down. The filaments of better quality down are longer, and the down buds formed are also larger.

[0004] Hollow fiber is an important special-shaped fiber with a cavity along the axial direction of the cross section. The hollow structure gives the fiber good warmth retention and fluffiness. The varieties of hollow fiber are extremely rich and developing rapidly. The number of fiber holes has developed from single hole to four holes, seven holes, nine holes, etc.; the hollow cross section has also developed from round to triangle, quadrilateral, plum blossom, etc. The hollow structure reduces the weight of the fiber and makes its interior rich in still air, greatly increasing the warmth retention of the unit mass product.

[0005] The thermal conductivity index of fine denier polypropylene is the lowest among all synthetic fibers and natural fibers. The heat conduction rate of fine denier polypropylene is very slow and the heat loss rate is very low. Therefore, its thermal insulation performance is better than other fibers and it is a very good thermal insulation material.

[0006] Most of the above thermal insulation materials rely on static thermal insulation effects and cannot adjust their own temperature in time according to changes in ambient temperature. In cold climates, these materials are prone to accumulate moisture, resulting in reduced thermal insulation performance and even producing odor, affecting the wearer's comfort. In addition, most existing thermal insulation materials lack antibacterial functions and are prone to breeding bacteria, affecting health and comfort. Therefore, the development of a new thermal insulation material that integrates temperature control, self-heating, breathability and antibacterial properties has become an important direction of current technical research. Summary of the invention

[0007] One object of the present invention is to provide a temperature-controlled self-heating wool flake thermal insulation material, which solves the problem that the existing thermal insulation materials cannot adjust their own temperature according to changes in ambient temperature.

[0008] Another object of the present invention is to provide a preparation process of a temperature-controlled self-heating wool flake thermal insulation material.

[0009] The first technical solution adopted by the present invention is a temperature-controlled self-heating wool flake thermal insulation material, including an anti-transmission temperature control layer, a microfiber support layer and a hollow antibacterial heating layer. The anti-transmission temperature control layer and the hollow antibacterial heating layer are arranged opposite to each other up and down, and the microfiber support layer is located between the anti-transmission temperature control layer and the hollow antibacterial heating layer. The anti-transmission temperature control layer, the hollow antibacterial heating layer and the microfiber support layer are all bonded by low-melting-point polyethylene.

[0010] The thickness ratio of the anti-transmission temperature control layer, the ultrafine fiber support layer and the hollow antibacterial heating layer is 1-2: 0.1-0.5: 2-5, and the total surface density of the temperature-controlling self-heating wool flake thermal insulation material is 100g / m²~400g / m².

[0011] The anti-permeability temperature control layer is composed of enzyme-treated moisture-permeable wool fibers, waterproof, breathable, phase-change, temperature-regulating acrylic fibers and polyurethane foam. The waterproof, breathable, phase-change, temperature-regulating acrylic fibers are embedded in the enzyme-treated moisture-permeable wool fibers, and the polyurethane foam is filled in the pores between the enzyme-treated moisture-permeable wool fibers and the waterproof, breathable, phase-change, temperature-regulating acrylic fibers.

[0012] The second technical solution adopted by the present invention is a preparation process of a temperature-controlled self-heating wool flake thermal insulation material, comprising the following steps: Step 1, preparing an anti-permeability temperature control layer, including uniformly combing enzyme-treated moisture-permeable wool fiber, waterproof breathable phase-change temperature-regulating acrylic fiber and water-soluble fiber into a mesh structure by a carding machine, and then laying a mesh by a web laying machine to form an anti-permeability temperature control flocculent sheet, and then removing the water-soluble fiber to form a stepped pore distribution in the anti-permeability temperature control flocculent sheet, and finally filling the pores with polyurethane foam; Step 2, preparing an ultrafine fiber support layer, dissolving polylactic acid and phase change microcapsules in a solvent and mixing them evenly to form a polymer solution, wherein the concentration of polylactic acid is 8-14%, and the concentration of phase change microcapsules is 3-5%, and the polymer solution is electrospun to form ultrafine fibers with a diameter of 100nm to 2μm, which are then woven into an ultrafine fiber network, i.e., an ultrafine fiber support layer; Step 3, preparing a hollow antibacterial heating layer, mixing mercerized wool fiber, hollow antibacterial heating filament and two-component sheath-core heterogeneous low-melting-point fiber soaked in a low-melting-point polyethylene solution, combing it into a mesh by a carding machine, and then laying the mesh by a web laying machine to obtain a hollow antibacterial heating layer; Step 4: evenly coat the upper layer of the anti-transmission temperature control layer and the bottom layer of the hollow antibacterial heating layer with a low melting point polyethylene solution, and then stack the anti-transmission temperature control layer, the ultrafine fiber support layer and the hollow antibacterial heating layer from bottom to top, using an arrangement method where the adjacent layers are arranged at different angles and directions, rotate each layer by 45°, and then cut the edges, hot-melt bond them in a hot air oven, and finally fix them with a stitching process. The specific process of step 1 is as follows: Step 1.1, preparing the first layer of anti-permeability temperature-control fiber web, weighing the following components by mass percentage, 20-40% of waterproof and breathable phase-change temperature-control acrylic fiber, 50-70% of enzyme-treated moisture-permeable wool fiber, and 5-10% of water-soluble fiber, the sum of the mass percentages of the above components is 100%, mixing the weighed waterproof and breathable phase-change temperature-control acrylic fiber and enzyme-treated moisture-permeable wool fiber evenly through an opener and a cotton box-type cotton blending machine, and then combing them together with the water-soluble fiber into a mesh through a carding machine, adding the water-soluble fiber to the guide groove added at the feeding roller, and adding it in a strip, dot or line arrangement, and finally laying the net through a web laying machine to form the first layer of anti-permeability temperature-control fiber web; Step 1.2, preparing a second layer of anti-transmission temperature-control fiber web, weighing the following components by mass percentage, respectively, waterproof and breathable phase-change temperature-control acrylic fiber 20-40%, enzyme-treated moisture-permeable wool fiber 50-70%, water-soluble fiber dosage 10-15%, the sum of the mass percentages of the above components is 100%, the weighed waterproof and breathable phase-change temperature-control acrylic fiber and enzyme-treated moisture-permeable wool fiber are mixed evenly through an opener and a cotton box-type cotton blending machine, and then combed together with the water-soluble fiber into a mesh through a carding machine, the water-soluble fiber is added to the guide groove added at the feeding roller, and is added in a strip, dot or line arrangement, and the second layer of anti-transmission temperature-control fiber web is formed by laying the web with a web laying machine, and the amount of water-soluble polyvinyl alcohol fiber added to the second layer of anti-transmission temperature-control fiber web is more than the amount of water-soluble polyvinyl alcohol fiber added to the first layer of anti-transmission temperature-control fiber web; Step 1.3, consolidating the first layer of anti-permeability temperature control fiber mesh and the second layer of anti-permeability temperature control fiber mesh by needle punching to form a double-layer composite anti-permeability temperature control flocculent sheet; Step 1.4, removing the water-soluble fibers in the double-layer composite anti-transmission temperature-controlling floccules, so as to form a stepped pore distribution in the double-layer composite anti-transmission temperature-controlling floccules, and then filling the pores with polyurethane foam.

[0013] The enzyme-treated moisture-permeable wool fiber is a wool fiber treated with an acidic enzyme, using 1-3 g / L of an activator and 2-4 g / L of an acidic protease, and is impregnated under weakly acidic conditions of 40-60°C and a pH value of 5.5-6.5, and then heat-treated at 70-90°C to inactivate the acidic protease; finally, it is washed with water to remove residual enzymes and the activator, and then dried to obtain the enzyme-treated moisture-permeable wool fiber, and the water-soluble fiber is a water-soluble polyvinyl alcohol fiber.

[0014] The waterproof, breathable, phase-change, temperature-regulating acrylic fiber is a phase-change, temperature-regulating acrylic fiber that has been treated with a waterproof and breathable finishing agent of 30-60g / L and a cross-linking agent of 0-10g / L. The phase-change, temperature-regulating acrylic fiber is prepared by a microencapsulation method. The phase change material is wrapped and sealed with a polymer to form a microcapsule. The microcapsules containing the phase change material are blended with the polymer to obtain the phase change temperature of the phase change material in the phase change, temperature-regulating acrylic fiber, which is lower than the phase change temperature of the phase change microcapsule, forming a phase change temperature ladder arrangement.

[0015] In step 3, the following components are weighed respectively by mass percentage: 10-40% of hollow antibacterial heating filaments, 50-80% of mercerized wool fibers, and 5-30% of two-component sheath-core heterogeneous low-melting-point fibers immersed in a low-melting-point polyethylene solution. The sum of the mass percentages of the above components is 100%. The weighed mercerized wool fibers, hollow antibacterial heating filaments and two-component sheath-core heterogeneous low-melting-point fibers immersed in a low-melting-point polyethylene solution are mixed evenly to form a mixed interwoven structure, which is then evenly combed into a mesh by a carding machine.

[0016] Mercerized wool fiber is wool fiber that has been mercerized. The wool fiber is first chlorinated with 0.2-0.5% sodium hypochlorite solution, and then dechlorinated with 0.1-0.3% sodium carbonate and 0.02-0.1% sodium sulfite to complete the mercerization treatment and obtain mercerized wool fiber.

[0017] The sheath and core of the two-component sheath-core heterogeneous low-melting-point fiber is a concentric circle structure. The core uses fibers with a hot melting temperature higher than 160°C, and the sheath uses fibers with a hot melting temperature of 120-160°C. The diameter of the two-component sheath-core heterogeneous low-melting-point fiber is 1.5D-2D, and the average length is 38mm-51mm.

[0018] The beneficial effects of the present invention are as follows: (1) The temperature-controlling self-heating wool flake thermal insulation material is composed of an anti-permeable temperature control layer, a microfiber support layer and a hollow antibacterial heating layer. It integrates temperature control, self-heating and antibacterial properties. It can automatically adjust the body temperature according to the changes in ambient temperature and spontaneously generate heat in a cold environment. It effectively improves the warmth retention effect and comfort while giving the flakes antibacterial properties, effectively reducing the generation of odor, and regulating the discharge of moisture through its superior breathability, ensuring that the wearer remains comfortable in a dual environment of dampness and coldness; (2) The thickness ratio of the anti-transmission temperature control layer, the ultra-fine fiber support layer and the hollow antibacterial heating layer is 1-2: 0.1-0.5: 2-5, and the total surface density of the temperature-controlling self-heating wool flake thermal insulation material is 100g / m² to 400g / m², ensuring that the material is both light and has a certain structural strength; (3) The anti-permeability temperature control layer is composed of enzyme-treated moisture-permeable wool fiber, waterproof and breathable phase-change temperature-regulating acrylic fiber and polyurethane foam, forming an internal and external two-way adjustment mechanism to maintain a comfortable wearing experience. The polyurethane foam provides a supporting skeleton for the flakes to resist deformation during wearing. (4) The anti-transmission temperature control layer, the hollow antibacterial heating layer and the ultra-fine fiber support layer are all bonded by low-melting-point polyethylene. The melting morphology and speed of each layer are inconsistent, so that the fibers in each layer are entangled with each other, forming a strong interlocking structure; (5) The ultrafine fiber support layer is formed by electrospinning technology under the action of an electric field. It has good air permeability and structural stability. As an intermediate layer, it can prevent the layers from sliding and deforming. (6) The hollow antibacterial heating layer is made of a mixture of mercerized wool fiber, hollow antibacterial heating filaments and a two-component skin-core heterogeneous low-melting-point fiber soaked in a low-melting-point polyethylene solution. This not only optimizes the feel of the material, making it softer and more comfortable, but also significantly improves the antibacterial and heating properties of the thermal insulation material. The hollow antibacterial heating filaments can effectively prevent bacterial growth and the generation of odor, thereby improving the comfort and health of use. (7) The combination of a two-component sheath-core heterogeneous low-melting-point fiber and a low-melting-point polyethylene coating achieves a stepped melting point arrangement. Materials with different melting points can melt layer by layer, significantly improving the close connection between layers and avoiding the delamination or sliding problems that may occur in traditional multi-layer materials. (8) The anti-transmission temperature control layer, the microfiber support layer and the hollow antibacterial heating layer are stacked layer by layer from bottom to top, and the adjacent layers are arranged at different angles and directions, and each layer is rotated 45°. The unique multi-layer entangled structure and layer-by-layer offset processing design and sewing process not only enhance the material's tear resistance, but also improve the material's structural strength and durability, thereby increasing its service life and ensuring long-term use effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the temperature-controlled self-heating wool flake thermal insulation material of the present invention; Figure 2 It is a schematic structural diagram of the anti-transmission temperature control layer in the temperature-controlled self-heating wool flake thermal insulation material of the present invention; Figure 3 It is a schematic diagram of the structure of the two-component skin-core heterogeneous low-melting-point fiber in the temperature-controlled self-heating wool flake thermal insulation material of the present invention; Figure 4 It is a structural schematic diagram of a guide rail groove added to a feeding roller in the preparation process of the temperature-controlled self-heating wool flake thermal insulation material of the present invention.

[0020] In the figure, 1. anti-transmission temperature control layer, 2. ultra-fine fiber support layer, 3. hollow antibacterial heating layer, 4. first layer of anti-transmission temperature control fiber mesh, 5. second layer of anti-transmission temperature control fiber mesh, 6. core, 7. skin layer. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 A temperature-controlled self-heating wool wadding thermal insulation material, see Figure 1 , including an anti-transmission temperature control layer 1, an ultrafine fiber support layer 2 and a hollow antibacterial heating layer 3. The anti-transmission temperature control layer 1 and the hollow antibacterial heating layer 3 are arranged opposite to each other up and down, and the ultrafine fiber support layer 2 is located between the anti-transmission temperature control layer 1 and the hollow antibacterial heating layer 3. The anti-transmission temperature control layer 1, the hollow antibacterial heating layer 3 and the ultrafine fiber support layer 2 are all bonded by low-melting-point polyethylene.

[0023] The anti-permeability temperature control layer 1 is composed of enzyme-treated moisture-permeable wool fibers, waterproof, breathable, phase-change, temperature-regulating acrylic fibers and polyurethane foam. The waterproof, breathable, phase-change, temperature-regulating acrylic fibers are embedded in the enzyme-treated moisture-permeable wool fibers, and the polyurethane foam is filled in the pores between the enzyme-treated moisture-permeable wool fibers and the waterproof, breathable, phase-change, temperature-regulating acrylic fibers.

[0024] The thickness ratio of the anti-transmission temperature control layer 1, the ultrafine fiber support layer 2 and the hollow antibacterial heating layer 3 is 1:0.2:2; the total surface density of the temperature-controlling self-heating wool flake thermal insulation material is 100g / m².

[0025] Example 2 A temperature-controlled self-heating wool flake thermal insulation material comprises an anti-transmission temperature control layer 1, a microfiber support layer 2 and a hollow antibacterial heating layer 3. The anti-transmission temperature control layer 1 and the hollow antibacterial heating layer 3 are arranged opposite to each other up and down, and the microfiber support layer 2 is located between the anti-transmission temperature control layer 1 and the hollow antibacterial heating layer 3. The anti-transmission temperature control layer 1, the hollow antibacterial heating layer 3 and the microfiber support layer 2 are all bonded by low-melting-point polyethylene.

[0026] The anti-permeability temperature control layer 1 is composed of enzyme-treated moisture-permeable wool fibers, waterproof, breathable, phase-change, temperature-regulating acrylic fibers and polyurethane foam. The waterproof, breathable, phase-change, temperature-regulating acrylic fibers are embedded in the enzyme-treated moisture-permeable wool fibers, and the polyurethane foam is filled in the pores between the enzyme-treated moisture-permeable wool fibers and the waterproof, breathable, phase-change, temperature-regulating acrylic fibers.

[0027] The thickness ratio of the anti-transmission temperature control layer 1, the ultrafine fiber support layer 2 and the hollow antibacterial heating layer 3 is 2:0.5:5; the total surface density of the temperature-controlling self-heating wool flake thermal insulation material is 200g / m².

[0028] Example 3 A temperature-controlled self-heating wool flake thermal insulation material comprises an anti-transmission temperature control layer 1, a microfiber support layer 2 and a hollow antibacterial heating layer 3. The anti-transmission temperature control layer 1 and the hollow antibacterial heating layer 3 are arranged opposite to each other up and down, and the microfiber support layer 2 is located between the anti-transmission temperature control layer 1 and the hollow antibacterial heating layer 3. The anti-transmission temperature control layer 1, the hollow antibacterial heating layer 3 and the microfiber support layer 2 are all bonded by low-melting-point polyethylene.

[0029] The anti-permeability temperature control layer 1 is composed of enzyme-treated moisture-permeable wool fibers, waterproof, breathable, phase-change, temperature-regulating acrylic fibers and polyurethane foam. The waterproof, breathable, phase-change, temperature-regulating acrylic fibers are embedded in the enzyme-treated moisture-permeable wool fibers, and the polyurethane foam is filled in the pores between the enzyme-treated moisture-permeable wool fibers and the waterproof, breathable, phase-change, temperature-regulating acrylic fibers.

[0030] The thickness ratio of the anti-transmission temperature control layer 1, the ultrafine fiber support layer 2 and the hollow antibacterial heating layer 3 is 2:0.3:3; the total surface density of the temperature-controlling self-heating wool flake thermal insulation material is 400g / m².

[0031] Example 4 A preparation process of a temperature-controlled self-heating wool flake thermal insulation material, comprising the following steps: Step 1, material selection: the wool fiber has a diameter range of 24-35μm and a length range of 35-65mm; the phase-change temperature-regulating acrylic fiber is Tempsense fiber produced by Qingdao Bangte Company, a natural regenerated fiber with acrylic fiber as a carrier, with a diameter of 1.5-5D, a length of 30-70mm, and an enthalpy value of 15-40J. The phase-change temperature-regulating acrylic fiber is prepared by a microcapsule method, and the phase-change material is wrapped and sealed with a polymer to form a microcapsule, and the microcapsule containing the phase-change material is blended and spun with the polymer; the water-soluble polyvinyl alcohol fiber is a water-soluble fiber produced by Shandong Rongfeng Textile Co., Ltd., with specifications of 1.50dtex*38mm (water-soluble at 20°C), 1.40dtex*38mm (40 ℃), 2.2dtex*38mm / 76mm (water-soluble at 40℃), 1.67dtex*38mm / 51mm / 76mm (water-soluble at 60℃); the hollow antibacterial heating filament is an antibacterial heating hollow fiber produced by Shaoxing Xineng Textile Technology Co., Ltd., with a diameter of 75D, an average length of 30-40mm after cutting, or a fiber diameter of 1-4D, a length of 38-51mm, ≥20% hollowness, and a far-infrared heating antibacterial powder in the matrix, with a far-infrared emissivity of ≥85%, a temperature rise of ≥1.6℃, and a spectral antibacterial property, which can effectively eliminate odor; the two-component sheath-core heterogeneous low-melting-point fiber is an ES composite fiber produced by Jiangsu Zhongshi Fiber Co., Ltd., with a diameter of 2D and an average length of 38mm.

[0032] Step 2, preparing the anti-transmission temperature control layer 1, the specific process is as follows: Step 2.1, treating part of the wool fibers selected in step 1 with acidic enzymes, using 1-3 g / L of activator and 2-4 g / L of acidic protease, and performing an impregnation treatment under weakly acidic conditions of 40-60°C and pH 5.5-6.5; effectively degrading the scale layer on the surface of the wool fiber and enhancing its moisture permeability. Subsequently, heat treatment is performed at 70-90°C to inactivate the acidic protease and ensure the deactivation of the enzyme; after washing with water to remove the residual enzyme and activator, drying treatment is performed to obtain enzyme-treated moisture-permeable wool fibers, and the scale layer on the surface of the wool fiber can be effectively stripped by acidic enzyme treatment to enhance its moisture permeability.

[0033] The phase-change temperature-adjusting acrylic fiber selected in step 1 is treated with 30-60 g / L of a waterproof and breathable finishing agent and 0-10 g / L of a cross-linking agent to obtain a waterproof and breathable phase-change temperature-adjusting acrylic fiber. The waterproof and breathable finishing agent is a water-soluble emulsified fluoride or a fluorocarbon polymer, which is a weak cationic type. A cross-linking agent may be added to enhance the bonding strength; Step 2.2, prepare the first layer of anti-transmission temperature-controlled fiber mesh 4, weigh the following components by mass percentage, 20-40% of waterproof and breathable phase-change temperature-controlled acrylic fiber, 50-70% of enzyme-treated moisture-permeable wool fiber, and 5-10% of water-soluble polyvinyl alcohol fiber, the sum of the mass percentages of the above components is 100%, mix the weighed waterproof and breathable phase-change temperature-controlled acrylic fiber and enzyme-treated moisture-permeable wool fiber evenly through an opener and a cotton box-type cotton blending machine, and then comb them together with the water-soluble polyvinyl alcohol fiber into a mesh through a carding machine, add the water-soluble polyvinyl alcohol fiber to the guide groove added at the feeding roller to achieve quantitative control of the water-soluble polyvinyl alcohol fiber, and control the arrangement of the water-soluble polyvinyl alcohol fiber, which can be added in strip, point or line arrangement to achieve precise control of the addition of the water-soluble polyvinyl alcohol fiber and then achieve precise control of the pore arrangement, and finally lay the net through a web laying machine to form the first layer of anti-transmission temperature-controlled fiber mesh; Step 2.3, prepare the second layer of anti-transmission temperature control fiber mesh 5, weigh the following components by mass percentage, waterproof breathable phase change temperature regulating acrylic fiber 20-40%, enzyme treated moisture permeable wool fiber 50-70%, water-soluble polyvinyl alcohol fiber 10-15%, the sum of the mass percentages of the above components is 100%, mix the weighed waterproof breathable phase change temperature regulating acrylic fiber and enzyme treated moisture permeable wool fiber evenly through an opener and a cotton box type blending machine, and then comb them together with the water-soluble polyvinyl alcohol fiber into a mesh shape through a carding machine, and the water-soluble polyvinyl alcohol fiber is evenly combed into a mesh shape through a carding machine. The polyvinyl alcohol fiber is added to the guide groove added at the feeding roller to achieve quantitative control of the water-soluble polyvinyl alcohol fiber and control the arrangement of the water-soluble polyvinyl alcohol fiber. The water-soluble polyvinyl alcohol fiber can be added in a strip, dot or line arrangement to achieve precise control of the addition of the water-soluble polyvinyl alcohol fiber and thus achieve precise control of the pore arrangement. Finally, the second layer of the anti-transmission temperature control fiber net is formed by laying the net with a laying machine. The amount of water-soluble polyvinyl alcohol fiber added to the second layer of the anti-transmission temperature control fiber net 5 is more than that added to the first layer of the anti-transmission temperature control fiber net 4. Step 2.4, consolidating the first layer of anti-permeability temperature control fiber mesh 4 and the second layer of anti-permeability temperature control fiber mesh 5 by needle punching to form a double-layer composite anti-permeability temperature control flocculent sheet; Step 2.5, removing the water-soluble polyvinyl alcohol fiber in the double-layer composite anti-transmission temperature control flocculent sheet, the ratio of water to water-soluble polyvinyl alcohol fiber is 200:1, in actual preparation, the ratio range can be appropriately expanded according to the water absorption capacity of the remaining fibers, the aqueous solution is heated to the required temperature, and the water-soluble polyvinyl alcohol fiber is removed by washing; because the amount of water-soluble polyvinyl alcohol fiber added in the second layer of anti-transmission temperature control fiber net 5 is more than that in the first layer of anti-transmission temperature control fiber net 4, the double-layer composite anti-transmission temperature control flocculent sheet is formed. The two layers are stacked into an air layer structure with a packaging film, placed in a mold, and polyol (agent A) and isocyanate (agent B) are weighed. The ratio of the two reagents is 2:1. The isocyanate (agent B) is added to the polyol (agent A) through a glass rod and stirred rapidly. When the solution is slightly heated, it is quickly poured into a polypropylene tray containing a double-layer composite anti-transmission temperature control flake. Finally, the pores are filled with polyurethane foam. The thickness of the anti-transmission temperature control layer is 4-7mm and the surface density is 60-100g / m 2 , see Figure 2 .

[0034] Step 3, preparing the ultrafine fiber support layer 2, the specific process is as follows: Step 3.1, place the medical grade polylactic acid (PLA) powder in an 85°C dryer for 4 hours, then add it to a DCM (dichloromethane) and DMF (N,N-dimethylformamide) solvent with a volume ratio of 2:1 to form a mixed solution, then add the phase change microcapsules thereto, and then place it in a 37°C water bath, stir it at a constant speed with a magnetic stirrer for 5 hours, mix it evenly, and form a polymer solution, wherein the concentration of polylactic acid (PLA) is 8-14%, the concentration of phase change microcapsules is 3-5%, and the particle size of the phase change microcapsules is 5μm to 10μm. The shell material is a polymer material (such as PMMA, polyurethane, etc.), and the core material is a high-purity normal alkane paraffin. The phase change temperature of the phase change microcapsule is higher than the phase change temperature of the phase change material in the intelligent temperature-regulating acrylic fiber in the anti-transmission temperature control layer, forming a temperature gradient from the outside to the inside, ensuring more accurate and continuous temperature regulation in the variable ambient temperature; Step 3.2, The polymer solution is electrospun to form ultrafine fibers with a diameter of 100nm to 2μm, which are then woven into an ultrafine fiber support layer for interlayer support; Step 4, preparing the hollow antibacterial heating layer 3, the specific process is as follows: Step 4.1, first chlorinating the wool fiber with a 0.2-0.5% sodium hypochlorite solution, and then dechlorinating with 0.1-0.3% sodium carbonate and 0.02-0.1% sodium sulfite, thus completing the mercerization treatment to obtain mercerized wool fiber; Step 4.2, dipping the two-component sheath-core heterogeneous low-melting-point fiber into a low-melting-point polyethylene solution prepared from low-melting-point polyethylene powder, wherein the concentration of the low-melting-point polyethylene solution is 3-10%, and the pretreatment is completed. The external melting point of the fiber is reduced by dipping in the low-melting-point polyethylene solution, and the melting point is controlled by controlling the melting temperature; See also Figure 3 The core and the sheath of the two-component sheath-core heterogeneous low-melting-point fiber have different melting points. The sheath and core of the two-component sheath-core heterogeneous low-melting-point fiber are concentric circle structures. The core 6 adopts fibers with a hot melting temperature higher than 160°C, and the sheath 7 adopts fibers with a hot melting temperature of 120-160°C. The diameter of the two-component sheath-core heterogeneous low-melting-point fiber is 1.5D-2D, and the average length is 38-51mm.

[0035] The core and the cortex of the two-component core-skin heterogeneous low-melting-point fiber are selected from one or more composite fibers of low-melting-point polyolefin fiber, low-melting-point copolyester fiber, low-melting-point copolyamide fiber, and corn fiber. The low-melting-point polyethylene has a melting point of 102°C and an average particle size of about 20 μm.

[0036] Step 4.3, weigh the following components respectively by mass percentage: 10-40% of hollow antibacterial heating filaments, 50-80% of mercerized wool fibers, and 5-30% of two-component sheath-core heterogeneous low-melting-point fibers immersed in a low-melting-point polyethylene solution. The sum of the mass percentages of the above components is 100%. The weighed mercerized wool fibers, hollow antibacterial heating filaments and two-component sheath-core heterogeneous low-melting-point fibers immersed in a low-melting-point polyethylene solution are mixed evenly to form a mixed interwoven structure, and then evenly combed into a mesh by a carding machine, and finally laid by a web laying machine to obtain a hollow antibacterial heating layer 3. The thickness of the hollow antibacterial heating layer is 4 mm, and the surface density is 60-140 g / m 2 ; Step 5, evenly apply low melting point polyethylene solution on the upper layer of the anti-transmission temperature control layer 1 and the bottom layer of the hollow antibacterial heating layer 3, which can be applied multiple times, and then the anti-transmission temperature control layer 1, the ultrafine fiber support layer 2 and the hollow antibacterial heating layer 3 are stacked layer by layer from bottom to top, and the adjacent layers are arranged at different angles and directions, and each layer is rotated 45°. Finally, the edges are cut and hot-melted in a hot air oven. The hot-melt temperature is controlled to be above 102°C or above 120°C as required, and the hot-melt time is 2-10 minutes. After completion, it is fixed by sewing process, and different stitch patterns are used to enhance the firmness of the structure, and also provide better aesthetics and personalized choices. When it is necessary to prevent inter-layer slippage or increase tensile strength, a more intensive stitching method can be selected, and when it is necessary to maintain the softness of the material, a looser sewing pattern can be used.

[0037] The present invention forms a temperature-controlled self-heating wool flake thermal insulation material by stacking an anti-transmission temperature control layer, a microfiber support layer and a hollow antibacterial heating layer layer by layer, which integrates temperature control, self-heating and antibacterial properties, can automatically adjust the body environment temperature according to the change of ambient temperature, and realizes temperature control through the "solid-liquid" transformation of the phase change microcapsule material. When the ambient temperature rises to the phase change temperature of the phase change microcapsule, the phase change material in the microcapsule absorbs the heat of the surrounding environment and changes from solid to liquid. Since the phase change process is accompanied by a large amount of heat absorption, it brings a cooling effect; when the ambient temperature drops and is lower than the phase change temperature of the phase change microcapsule, the phase change material changes from liquid to solid and releases the previously absorbed heat. This process of heat absorption and heat release will automatically occur with the change of ambient temperature, without the participation of external energy, and realizes automatic adjustment of the body environment temperature according to the change of ambient temperature; the phase change temperature of the phase change microcapsules in the anti-transmission temperature control layer and the microfiber support layer is arranged in a step-by-step manner, providing more stable and continuous heat absorption and release performance.

[0038] The temperature-controlled self-heating wool flake thermal insulation material generates heat spontaneously in cold environments. The hollow antibacterial heating filament matrix contains heating powders such as nano far-infrared ceramics, tourmaline, and bamboo charcoal. When these ceramic particles are affected by external temperature or human body temperature, they will convert heat energy into far-infrared radiation energy through vibration and rotation; when tourmaline particles are embedded in the fiber, after a certain pressure or friction (such as contact, movement, and expansion and contraction between the human body and clothing), the tourmaline will release a tiny current, which can be converted into heat energy, thereby generating heat in the fiber; bamboo charcoal particles can promote blood circulation and relax muscles by absorbing external heat, thereby providing a continuous sense of warmth. The synergistic effect of the above materials realizes the spontaneous generation of heat in cold environments; at the same time, the liquid-solid transition of the phase change microcapsules in the phase change fiber will also effectively release heat.

[0039] This thermal insulation material effectively improves the warmth retention effect and comfort level while giving the flakes antibacterial properties, effectively reducing odor generation, and regulating moisture discharge through its superior breathability. First, the wool fibers treated with acidic enzymes will improve the moisture permeability of the wool fibers themselves to a certain extent; secondly, the hollow antibacterial heating layer and the ultrafine fiber support layer in the multi-layer structure ensure the smooth flow of air and promote the discharge of water vapor through their hollow structure and micropores. The design of the anti-permeable temperature control layer gives it a certain degree of moisture permeability to avoid moisture problems caused by sweat accumulation; the ultrafine fiber support layer is bonded to other layers through a low-melting-point polyethylene adhesive material, which will not completely block the passage of air and water vapor. Therefore, this design can maintain moisture discharge while providing comfortable temperature control and heating, avoiding discomfort to the wearer due to moisture, and ensuring that the wearer remains comfortable in a dual environment of moisture and cold.

[0040] Example 5 A preparation process of a temperature-controlled self-heating wool flake thermal insulation material, comprising the following steps: Step 1, material selection: wool fiber diameter range is 24-35μm, length range is 35-65mm; phase change temperature regulating acrylic fiber is Tempsense fiber produced by Qingdao Bonte Company, with a diameter of 1.5D, a length of 38mm, and an enthalpy value of 15J. The phase change temperature regulating acrylic fiber is prepared by a microencapsulation method, and the phase change material is wrapped and sealed with a polymer to form a microcapsule, and the microcapsules containing the phase change material are blended with the polymer to obtain the obtained fiber; water-soluble polyvinyl alcohol fiber is a water-soluble fiber produced by Shandong Rongfeng Textile Co., Ltd., with a diameter of 1.40dtex, an average length of 38mm, and water soluble at 40°C; hollow antibacterial heating filament is an antibacterial heating hollow fiber produced by Shaoxing Xineng Textile Technology Co., Ltd., with a diameter of 75D and an average length of 40mm after cutting; the two-component sheath-core heterogeneous low-melting-point fiber is an ES composite fiber produced by Jiangsu Zhongshi Fiber Co., Ltd., with a diameter of 2D and an average length of 38mm.

[0041] Step 2, preparing the anti-transmission temperature control layer 1, the specific process is as follows: Step 2.1, subjecting part of the wool fibers selected in step 1 to acidic enzyme treatment, using 1g / L of activator and 4g / L of acidic protease, and performing an immersion treatment at 40°C and a weakly acidic pH value of 5.5; effectively degrading the scale layer on the surface of the wool fiber and enhancing its moisture permeability. Subsequently, heat treatment is performed at 70°C to inactivate the acidic protease and ensure the deactivation of the enzyme; after washing with water to remove the residual enzyme and activator, drying treatment is performed to obtain enzyme-treated moisture-permeable wool fibers. The acidic enzyme treatment can effectively remove the scale layer on the surface of the wool fiber and enhance its moisture permeability; The phase-change temperature-regulating acrylic fiber selected in step 1 is treated with 30 g / L of a waterproof and breathable finishing agent and 2 g / L of a cross-linking agent to obtain a waterproof and breathable phase-change temperature-regulating acrylic fiber. The waterproof and breathable finishing agent is a water-soluble emulsified fluoride or a fluorocarbon polymer, which is a weak cationic type. A cross-linking agent may be added to enhance the bonding strength. Step 2.2, prepare the first layer of anti-transmission temperature-controlled fiber mesh 4, weigh the following components respectively by mass percentage, waterproof breathable phase change temperature-regulating acrylic fiber 20%, enzyme-treated moisture-permeable wool fiber 70%, water-soluble polyvinyl alcohol fiber 10%, the sum of the mass percentages of the above components is 100%, mix the weighed waterproof breathable phase change temperature-regulating acrylic fiber and enzyme-treated moisture-permeable wool fiber evenly through an opener and a cotton box-type blending machine, and then comb them together with the water-soluble polyvinyl alcohol fiber into a mesh shape through a carding machine, and add the water-soluble polyvinyl alcohol fiber to the guide groove added at the feeding roller, the guide groove is as follows Figure 4 As shown, the guide groove can adjust the speed, width and placement number; realize quantitative control of water-soluble polyvinyl alcohol fibers, control the arrangement of water-soluble polyvinyl alcohol fibers, add them in a point-like arrangement, realize precise control of the addition of water-soluble polyvinyl alcohol fibers and then realize precise control of pore arrangement, and finally form the first layer of anti-transmission temperature control fiber net through the net laying machine; Step 2.3, prepare the second layer of anti-transmission temperature control fiber mesh 5, weigh the following components respectively by mass percentage, waterproof breathable phase change temperature regulating acrylic fiber 25%, enzyme treated moisture permeable wool fiber 60%, water-soluble polyvinyl alcohol fiber 15%, the sum of the mass percentages of the above components is 100%, mix the weighed waterproof breathable phase change temperature regulating acrylic fiber and enzyme treated moisture permeable wool fiber evenly through an opener and a cotton box type blending machine, and then comb them together with the water-soluble polyvinyl alcohol fiber into a mesh shape through a carding machine, and the water-soluble polyvinyl alcohol fiber is mixed into a mesh shape. The polyvinyl alcohol fiber is added to the guide groove added at the feeding roller to achieve quantitative control of the water-soluble polyvinyl alcohol fiber, control the arrangement of the water-soluble polyvinyl alcohol fiber, add it in a strip arrangement, achieve precise control of the addition of the water-soluble polyvinyl alcohol fiber and then achieve precise control of the pore arrangement, and finally form a second layer of anti-transmission temperature control fiber net through a web laying machine. The amount of water-soluble polyvinyl alcohol fiber added in the second layer of anti-transmission temperature control fiber net 5 is more than that in the first layer of anti-transmission temperature control fiber net 4; Step 2.4, consolidating the first layer of anti-transmission temperature control fiber mesh and the second layer of anti-transmission temperature control fiber mesh by needle punching to form a double-layer composite anti-transmission temperature control flake, which is cut into flakes of 50*50 cm in size; Step 2.5, removing the water-soluble polyvinyl alcohol fiber in the double-layer composite anti-transmission temperature control flocculent sheet, the ratio of water to water-soluble polyvinyl alcohol fiber is 200:1, in actual preparation, the ratio range can be appropriately expanded according to the water absorption capacity of the remaining fibers, the aqueous solution is heated to the required temperature, and the water-soluble polyvinyl alcohol fiber is removed by washing; because the amount of water-soluble polyvinyl alcohol fiber added in the second layer of anti-transmission temperature control fiber net 5 is more than that in the first layer of anti-transmission temperature control fiber net 4, the double-layer composite anti-transmission temperature control flocculent sheet is Form a stepped pore distribution, stack the two layers into an air layer structure with a packaging film, place it in a mold, weigh polyol (agent A) and isocyanate (agent B), the ratio of the two reagents is 2:1, add isocyanate (agent B) to polyol (agent A) through a glass rod, stir quickly, and when the solution is slightly heated, quickly pour it into a polypropylene tray containing a double-layer composite anti-transmission temperature control flakes, and finally fill the pores with polyurethane foam. The thickness of the anti-transmission temperature control layer is 4mm and the surface density is 80g / m 2 .

[0042] Step 3, preparing the ultrafine fiber support layer 2, the specific process is as follows: Step 3.1, place the medical grade polylactic acid (PLA) powder in an 85°C dryer and dry it for 4 hours, then add it to a DCM (dichloromethane) and DMF (N,N-dimethylformamide) solvent with a volume ratio of 2:1 to form a mixed solution, then add the phase change microcapsules thereto, and then place it in a 37°C water bath, stir it at a constant speed with a magnetic stirrer for 5 hours, mix it evenly, and form a polymer solution, wherein the concentration of polylactic acid (PLA) is 14%, the concentration of phase change microcapsules is 5%, and the particle size of the phase change microcapsules is 5μm. The shell material is a polymer material PMMA (polymethyl methacrylate), and the core material is a high-purity normal alkane paraffin. The phase change temperature of the phase change microcapsule is higher than the phase change temperature of the phase change material in the intelligent temperature-regulating acrylic fiber in the anti-transmission temperature control layer, forming a temperature gradient from the outside to the inside, ensuring more accurate and continuous temperature regulation in a variable ambient temperature; Step 3.2, electrospinning the polymer solution to form ultrafine fibers with a diameter of 100 nm to 0.5 μm, and then weaving the ultrafine fiber support layer for interlayer support; Step 4, preparing the hollow antibacterial heating layer 3, the specific process is as follows: Step 4.1, first chlorinating the wool fiber with a 0.2% sodium hypochlorite solution, and then dechlorinating with 0.1% sodium carbonate and 0.02% sodium sulfite, thus completing the mercerization treatment to obtain mercerized wool fiber; Step 4.2, immersing the two-component sheath-core heterogeneous low-melting-point fiber in a low-melting-point polyethylene solution prepared from low-melting-point polyethylene powder, wherein the concentration of the low-melting-point polyethylene solution is 3%, and the pretreatment is completed. The external melting point of the fiber immersed in the low-melting-point polyethylene solution is reduced, and the melting point is controlled by controlling the melting temperature; The core and the sheath of the two-component sheath-core heterogeneous low-melting-point fiber have different melting points. The sheath and core of the two-component sheath-core heterogeneous low-melting-point fiber are concentric circle structures. The core 6 uses fibers with a hot melting temperature higher than 160°C, and the sheath 7 uses fibers with a hot melting temperature of 120-160°C. The diameter of the two-component sheath-core heterogeneous low-melting-point fiber is 1.5D-2D, and the average length is 38-51mm.

[0043] The core of the two-component core-skin heterogeneous low-melting-point fiber is corn fiber, and the cortex is low-melting-point copolyamide fiber. The melting point of the low-melting-point polyethylene is 102°C, and the average particle size is about 20μm.

[0044] Step 4.3, weigh the following components respectively by mass percentage: 10% hollow antibacterial heating filament, 80% mercerized wool fiber, 10% two-component sheath-core heterogeneous low-melting-point fiber immersed in a low-melting-point polyethylene solution, the sum of the mass percentages of the above components is 100%, mix the weighed mercerized wool fiber, hollow antibacterial heating filament and two-component sheath-core heterogeneous low-melting-point fiber immersed in a low-melting-point polyethylene solution evenly to form a mixed interwoven structure, and then use a carding machine to evenly comb it into a mesh, and finally use a mesh laying machine to lay the mesh to obtain a hollow antibacterial heating layer 3, the thickness of the hollow antibacterial heating layer is 4 mm, and the surface density is 120 g / m 2 ; Step 5, evenly apply low melting point polyethylene solution on the upper layer of the anti-transmission temperature control layer 1 and the bottom layer of the hollow antibacterial heating layer 3, and can be applied multiple times. Then, the anti-transmission temperature control layer 1, the ultrafine fiber support layer 2 and the hollow antibacterial heating layer 3 are stacked layer by layer from bottom to top, and the adjacent layers are arranged at different angles and directions. The layers are rotated 45° layer by layer, and finally the edges are cut and hot-melted in a hot air oven. The hot-melting temperature is greater than 120°C and the hot-melting time is 2 minutes. After completion, the sewing process is used to fix it, and different stitch patterns are used to enhance the firmness of the structure and provide better aesthetics and personalized choices. When it is necessary to prevent inter-layer slippage or increase tensile strength, a more intensive stitching method can be selected, and when it is necessary to maintain the softness of the material, a looser sewing pattern can be used.

[0045] Example 6 A preparation process of a temperature-controlled self-heating wool flake thermal insulation material, comprising the following steps: Step 1, material selection: wool fiber diameter range is 24-35μm, length range is 35-65mm; phase change temperature regulating acrylic fiber is Tempsense fiber produced by Qingdao Bangte Company, with a diameter of 2D, a length of 30-50mm, and an enthalpy value of 25J. The phase change temperature regulating acrylic fiber is prepared by a microencapsulation method, and the phase change material is wrapped and sealed with a polymer to form a microcapsule, and the microcapsules containing the phase change material are blended with the polymer to obtain the obtained fiber; water-soluble polyvinyl alcohol fiber is a water-soluble fiber produced by Shandong Rongfeng Textile Co., Ltd., with a diameter of 1.5dtex, an average length of 38mm, and water soluble at 20°C; hollow antibacterial heating filament is an antibacterial heating hollow fiber produced by Shaoxing Xineng Textile Technology Co., Ltd., with a diameter of 75D and an average length of 30mm after cutting; the two-component sheath-core heterogeneous low-melting-point fiber is an ES composite fiber produced by Jiangsu Zhongshi Fiber Co., Ltd., with a diameter of 2D and an average length of 38mm.

[0046] Step 2, preparing the anti-transmission temperature control layer 1, the specific process is as follows: Step 2.1, the wool fibers selected in step 1 are treated with acidic enzymes, using 2g / L of activator and 3g / L of acidic protease, and are impregnated under weakly acidic conditions of 50°C and pH 6; the scale layer on the surface of the wool fibers is effectively degraded to enhance its moisture permeability. Subsequently, heat treatment is performed at 80°C to inactivate the acidic protease to ensure the deactivation of the enzyme; after washing with water to remove the residual enzyme and activator, drying treatment is performed to obtain enzyme-treated moisture-permeable wool fibers. The scale layer on the surface of the wool fibers can be effectively removed by acidic enzyme treatment to enhance its moisture permeability.

[0047] The phase-change temperature-adjusting acrylic fiber selected in step 1 is treated with 40 g / L of a waterproof and breathable finishing agent and 5 g / L of a cross-linking agent to obtain a waterproof and breathable phase-change temperature-adjusting acrylic fiber. The waterproof and breathable finishing agent is a water-soluble emulsified fluoride or a fluorocarbon polymer, which is a weak cationic type. A cross-linking agent may be added to enhance the bonding strength. Step 2.2, prepare the first layer of anti-transmission temperature-controlled fiber mesh 4, weigh the following components by mass percentage, 30% of waterproof and breathable phase-change temperature-controlled acrylic fiber, 65% of enzyme-treated moisture-permeable wool fiber, and 5% of water-soluble polyvinyl alcohol fiber, the sum of the mass percentages of the above components is 100%, mix the weighed waterproof and breathable phase-change temperature-controlled acrylic fiber and enzyme-treated moisture-permeable wool fiber evenly through an opener and a cotton box-type cotton blending machine, and then comb them together with the water-soluble polyvinyl alcohol fiber into a mesh through a carding machine, add the water-soluble polyvinyl alcohol fiber to the guide groove added at the feeding roller to achieve quantitative control of the water-soluble polyvinyl alcohol fiber, control the arrangement of the water-soluble polyvinyl alcohol fiber, add it in a linear arrangement, achieve precise control of the addition of the water-soluble polyvinyl alcohol fiber, and then achieve precise control of the pore arrangement, and finally lay the net through a web laying machine to form the first layer of anti-transmission temperature-controlled fiber mesh; Step 2.3, prepare the second layer of anti-transmission temperature control fiber mesh 5, weigh the following components respectively by mass percentage, waterproof breathable phase change temperature regulating acrylic fiber 20%, enzyme treated moisture permeable wool fiber 70%, water-soluble polyvinyl alcohol fiber 10%, the sum of the mass percentages of the above components is 100%, mix the weighed waterproof breathable phase change temperature regulating acrylic fiber and enzyme treated moisture permeable wool fiber evenly through an opener and a cotton box blending machine, and then comb them together with the water-soluble polyvinyl alcohol fiber into a mesh shape through a carding machine, and the water-soluble polyvinyl alcohol fiber is mixed into a mesh shape. The polyvinyl alcohol fiber is added to the guide groove added at the feeding roller to achieve quantitative control of the water-soluble polyvinyl alcohol fiber, control the arrangement of the water-soluble polyvinyl alcohol fiber, add it in a strip arrangement, achieve precise control of the addition of the water-soluble polyvinyl alcohol fiber and then achieve precise control of the pore arrangement, and finally form a second layer of anti-transmission temperature control fiber net through a web laying machine. The amount of water-soluble polyvinyl alcohol fiber added in the second layer of anti-transmission temperature control fiber net 5 is more than that in the first layer of anti-transmission temperature control fiber net 4; Step 2.4, consolidating the first layer of anti-permeability temperature control fiber mesh and the second layer of anti-permeability temperature control fiber mesh by needle punching to form a double-layer composite anti-permeability temperature control flocculent sheet; Step 2.5, removing the water-soluble polyvinyl alcohol fiber in the double-layer composite anti-transmission temperature control flocculent sheet, the ratio of water to water-soluble polyvinyl alcohol fiber is 200:1, in actual preparation, the ratio range can be appropriately expanded according to the water absorption capacity of the remaining fibers, the aqueous solution is heated to the required temperature, and the water-soluble polyvinyl alcohol fiber is removed by washing; because the amount of water-soluble polyvinyl alcohol fiber added in the second layer of anti-transmission temperature control fiber net 5 is more than that in the first layer of anti-transmission temperature control fiber net 4, the double-layer composite anti-transmission temperature control flocculent sheet is Form a stepped pore distribution, stack the two layers into an air layer structure with a packaging film, place it in a mold, weigh polyol (agent A) and isocyanate (agent B), the ratio of the two reagents is 2:1, add isocyanate (agent B) to polyol (agent A) through a glass rod, stir quickly, and when the solution is slightly heated, quickly pour it into a polypropylene tray containing a double-layer composite anti-transmission temperature control flakes, and finally fill the pores with polyurethane foam. The thickness of the anti-transmission temperature control layer is 5mm and the surface density is 60g / m 2 .

[0048] Step 3, preparing the ultrafine fiber support layer 2, the specific process is as follows: Step 3.1, place the medical grade polylactic acid (PLA) powder in an 85°C dryer and dry it for 4 hours, then add it to a DCM (dichloromethane) and DMF (N,N-dimethylformamide) solvent with a volume ratio of 2:1 to form a mixed solution, then add the phase change microcapsules thereto, and then place it in a 37°C water bath, stir it at a constant speed with a magnetic stirrer for 5 hours, mix it evenly, and form a polymer solution, wherein the concentration of polylactic acid (PLA) is 10%, the concentration of phase change microcapsules is 3%, and the particle size of the phase change microcapsules is 8μm. The shell material is polyurethane, and the core material is high-purity normal alkane paraffin. The phase change temperature of the phase change microcapsule is higher than the phase change temperature of the phase change material in the intelligent temperature-regulating acrylic fiber in the anti-transmission temperature control layer, forming a temperature gradient from the outside to the inside, ensuring more accurate and continuous temperature regulation in the variable ambient temperature; Step 3.2, electrospinning the polymer solution to form ultrafine fibers with a diameter of 0.8 to 2 μm, and then weaving them into an ultrafine fiber support layer for interlayer support; Step 4, preparing the hollow antibacterial heating layer 3, the specific process is as follows: Step 4.1, first chlorinating the wool fiber with a 0.3% sodium hypochlorite solution, and then dechlorinating with 0.2% sodium carbonate and 0.05% sodium sulfite, thus completing the mercerization treatment to obtain mercerized wool fiber; Step 4.2, immersing the two-component sheath-core heterogeneous low-melting-point fiber in a low-melting-point polyethylene solution prepared from low-melting-point polyethylene powder, wherein the concentration of the low-melting-point polyethylene solution is 5%, and the pretreatment is completed. The external melting point of the fiber immersed in the low-melting-point polyethylene solution is reduced, and the melting point is controlled by controlling the melting temperature; The core and the sheath of the two-component sheath-core heterogeneous low-melting-point fiber have different melting points. The sheath and core of the two-component sheath-core heterogeneous low-melting-point fiber are concentric circle structures. The core 6 is made of low-melting-point copolyester fiber with a thermal melting temperature higher than 160°C, and the sheath 7 is made of low-melting-point polyolefin fiber with a thermal melting temperature of 120-160°C. The diameter of the two-component sheath-core heterogeneous low-melting-point fiber is 1.5D-2D, and the average length is 38-51mm.

[0049] The melting point of low melting point polyethylene is 102°C and the average particle size is about 20 μm.

[0050] Step 4.3, weigh the following components respectively by mass percentage: 20% hollow antibacterial heating filament, 75% mercerized wool fiber, 5% two-component sheath-core heterogeneous low-melting-point fiber immersed in low-melting-point polyethylene solution, the sum of the mass percentages of the above components is 100%, mix the weighed mercerized wool fiber, hollow antibacterial heating filament and two-component sheath-core heterogeneous low-melting-point fiber immersed in low-melting-point polyethylene solution evenly to form a mixed interwoven structure, and then use a carding machine to evenly comb it into a mesh, and finally use a mesh laying machine to lay the mesh to obtain a hollow antibacterial heating layer 3, the thickness of the hollow antibacterial heating layer is 5 mm, and the surface density is 140 g / m 2 ; Step 5, evenly apply low melting point polyethylene solution on the upper layer of the anti-transmission temperature control layer 1 and the bottom layer of the hollow antibacterial heating layer 3, which can be applied multiple times, and then the anti-transmission temperature control layer 1, the ultrafine fiber support layer 2 and the hollow antibacterial heating layer 3 are stacked layer by layer from bottom to top, and the adjacent layers are arranged at different angles and directions, and each layer is rotated 45°. Finally, the edges are cut and hot-melted in a hot air oven. The hot-melting temperature is greater than 120°C and the hot-melting time is 5 minutes. After completion, the sewing process is used to fix it, and different stitch patterns are used to enhance the firmness of the structure and provide better aesthetics and personalized choices. When it is necessary to prevent inter-layer slippage or increase tensile strength, a more intensive stitching method can be selected, and when it is necessary to maintain the softness of the material, a looser sewing pattern can be used.

[0051] Example 7 A preparation process of a temperature-controlled self-heating wool flake thermal insulation material, comprising the following steps: Step 1, material selection: wool fiber diameter range is 24-35μm, length range is 35-65mm; phase change temperature regulating acrylic fiber is Tempsense fiber produced by Qingdao Bangte Company, with a diameter of 5D, a length of 51mm, and an enthalpy value of 40J. The phase change temperature regulating acrylic fiber is prepared by a microencapsulation method, and the phase change material is wrapped and sealed with a polymer to form a microcapsule, and the microcapsules containing the phase change material are blended with the polymer to obtain the obtained fiber; water-soluble polyvinyl alcohol fiber is a water-soluble fiber produced by Shandong Rongfeng Textile Co., Ltd., with a diameter of 1.67dtex, an average length of 51mm, and water-soluble at 60°C; hollow antibacterial heating filament is an antibacterial heating hollow fiber produced by Shaoxing Xineng Textile Technology Co., Ltd., with a diameter of 4D and an average length of 51mm after cutting; the two-component sheath-core heterogeneous low-melting-point fiber is an ES composite fiber produced by Jiangsu Zhongshi Fiber Co., Ltd., with a diameter of 2D and an average length of 38mm.

[0052] Step 2, preparing the anti-transmission temperature control layer 1, the specific process is as follows: Step 2.1, treating part of the wool fibers selected in step 1 with acidic enzymes, using 3g / L of activator and 3g / L of acidic protease, and performing an impregnation treatment under weakly acidic conditions of 60°C and pH 6.5; effectively degrading the scale layer on the surface of the wool fibers and enhancing their moisture permeability. Subsequently, heat treatment is performed at 70°C to inactivate the acidic protease and ensure the deactivation of the enzyme; after washing with water to remove the residual enzyme and activator, drying is performed to obtain enzyme-treated moisture-permeable wool fibers; The phase-change temperature-adjusting acrylic fiber selected in step 1 is treated with 30 g / L of a waterproof and breathable finishing agent and 10 g / L of a cross-linking agent to obtain a waterproof and breathable phase-change temperature-adjusting acrylic fiber. The waterproof and breathable finishing agent is a water-soluble emulsified fluoride or a fluorocarbon polymer, which is a weak cationic type. A cross-linking agent may be added to enhance the bonding strength. Step 2.2, prepare the first layer of anti-transmission temperature-controlled fiber mesh 4, weigh the following components by mass percentage, 40% of waterproof, breathable, phase-change temperature-controlled acrylic fiber, 54% of enzyme-treated moisture-permeable wool fiber, and 6% of water-soluble polyvinyl alcohol fiber, the sum of the mass percentages of the above components is 100%, mix the weighed waterproof, breathable, phase-change temperature-controlled acrylic fiber and enzyme-treated moisture-permeable wool fiber evenly through an opener and a cotton box-type cotton blending machine, and then comb them together with the water-soluble polyvinyl alcohol fiber into a mesh through a carding machine, add the water-soluble polyvinyl alcohol fiber to the guide groove added at the feeding roller to achieve quantitative control of the water-soluble polyvinyl alcohol fiber, control the arrangement of the water-soluble polyvinyl alcohol fiber, add it in a point-like arrangement, achieve precise control of the addition of the water-soluble polyvinyl alcohol fiber, and then achieve precise control of the pore arrangement, and finally lay the net through a web laying machine to form the first layer of anti-transmission temperature-controlled fiber mesh; Step 2.3, prepare the second layer of anti-transmission temperature control fiber mesh 5, weigh the following components respectively by mass percentage, waterproof breathable phase change temperature regulating acrylic fiber 30%, enzyme treated moisture permeable wool fiber 59%, water-soluble polyvinyl alcohol fiber 11%, the sum of the mass percentages of the above components is 100%, mix the weighed waterproof breathable phase change temperature regulating acrylic fiber and enzyme treated moisture permeable wool fiber evenly through an opener and a cotton box blending machine, and then comb them together with the water-soluble polyvinyl alcohol fiber into a mesh shape through a carding machine, and the water-soluble polyvinyl alcohol fiber is mixed into a mesh shape. The polyvinyl alcohol fiber is added to the guide groove added at the feeding roller to achieve quantitative control of the water-soluble polyvinyl alcohol fiber, control the arrangement of the water-soluble polyvinyl alcohol fiber, add it in a linear arrangement, achieve precise control of the addition of the water-soluble polyvinyl alcohol fiber and then achieve precise control of the pore arrangement, and finally form a second layer of anti-transmission temperature control fiber net through a web laying machine. The amount of water-soluble polyvinyl alcohol fiber added in the second layer of anti-transmission temperature control fiber net 5 is more than that in the first layer of anti-transmission temperature control fiber net 4; Step 2.4, consolidating the first layer of anti-permeability temperature control fiber mesh and the second layer of anti-permeability temperature control fiber mesh by needle punching to form a double-layer composite anti-permeability temperature control flocculent sheet; Step 2.5, removing the water-soluble polyvinyl alcohol fiber in the double-layer composite anti-transmission temperature control flocculent sheet, the ratio of water to water-soluble polyvinyl alcohol fiber is 200:1, in actual preparation, the ratio range can be appropriately expanded according to the water absorption capacity of the remaining fibers, the aqueous solution is heated to the required temperature, and the water-soluble polyvinyl alcohol fiber is removed by washing; because the amount of water-soluble polyvinyl alcohol fiber added in the second layer of anti-transmission temperature control fiber net 5 is more than that in the first layer of anti-transmission temperature control fiber net 4, the double-layer composite anti-transmission temperature control flocculent sheet is Form a stepped pore distribution, stack the two layers into an air layer structure with a packaging film, place it in a mold, weigh polyol (agent A) and isocyanate (agent B), the ratio of the two reagents is 2:1, add isocyanate (agent B) to polyol (agent A) through a glass rod, stir quickly, and when the solution is slightly heated, quickly pour it into a polypropylene tray containing a double-layer composite anti-transmission temperature control flakes, and finally fill the pores with polyurethane foam. The thickness of the anti-transmission temperature control layer is 6mm and the surface density is 100g / m 2 .

[0053] Step 3, preparing the ultrafine fiber support layer 2, the specific process is as follows: Step 3.1, place the medical grade polylactic acid (PLA) powder in an 85°C dryer for 4 hours, then add it to a DCM (dichloromethane) and DMF (N,N-dimethylformamide) solvent with a volume ratio of 2:1 to form a mixed solution, then add the phase change microcapsules thereto, and then place it in a 37°C water bath, stir it at a constant speed with a magnetic stirrer for 5 hours, mix it evenly, and form a polymer solution, wherein the concentration of polylactic acid (PLA) is 8%, the concentration of phase change microcapsules is 3%, the particle size of the phase change microcapsules is 10μm, the shell material is polyurethane, and the core material is high-purity normal alkane paraffin. The phase change temperature of the phase change microcapsule is higher than the phase change temperature of the phase change material in the intelligent temperature-regulating acrylic fiber in the anti-transmission temperature control layer, forming a temperature gradient from the outside to the inside, ensuring more accurate and continuous temperature regulation in the variable ambient temperature; Step 3.2, electrospinning the polymer solution to form ultrafine fibers with a diameter of 0.8 to 1 μm, and then weaving them into an ultrafine fiber support layer for interlayer support; Step 4, preparing the hollow antibacterial heating layer 3, the specific process is as follows: Step 4.1, firstly chlorinate the wool fiber with a 0.4% sodium hypochlorite solution, and then dechlorinate with 0.3% sodium carbonate and 0.02% sodium sulfite, thus completing the mercerization treatment to obtain mercerized wool fiber; Step 4.2, immersing the two-component sheath-core heterogeneous low-melting-point fiber in a low-melting-point polyethylene solution prepared from low-melting-point polyethylene powder, wherein the concentration of the low-melting-point polyethylene solution is 6%, and the pretreatment is completed. The external melting point of the fiber immersed in the low-melting-point polyethylene solution is reduced, and the melting point is controlled by controlling the melting temperature; The core and the sheath of the two-component sheath-core heterogeneous low-melting-point fiber have different melting points. The sheath and core of the two-component sheath-core heterogeneous low-melting-point fiber are concentric circle structures. The core 6 is made of low-melting-point copolyester fiber with a thermal melting temperature higher than 160°C, and the sheath 7 is made of low-melting-point polyolefin fiber ES with a thermal melting temperature of 120-160°C. The diameter of the two-component sheath-core heterogeneous low-melting-point fiber is 1.5D-2D, and the average length is 38-51mm.

[0054] The melting point of low melting point polyethylene is 102°C and the average particle size is about 20 μm.

[0055] Step 4.3, weigh the following components respectively by mass percentage: 30% of hollow antibacterial heating filaments, 60% of mercerized wool fibers, and 10% of two-component sheath-core heterogeneous low-melting-point fibers immersed in a low-melting-point polyethylene solution. The sum of the mass percentages of the above components is 100%. The weighed mercerized wool fibers, hollow antibacterial heating filaments and two-component sheath-core heterogeneous low-melting-point fibers immersed in a low-melting-point polyethylene solution are mixed evenly to form a mixed interwoven structure, and then evenly combed into a mesh by a carding machine, and finally laid by a web laying machine to obtain a hollow antibacterial heating layer 3. The thickness of the hollow antibacterial heating layer is 6 mm and the surface density is 120 g / m2 ; Step 5, evenly apply low-melting-point polyethylene solution on the upper layer of the anti-transmission temperature control layer 1 and the bottom layer of the hollow antibacterial heating layer 3, which can be applied multiple times, and then stack the anti-transmission temperature control layer 1, the ultrafine fiber support layer 2 and the hollow antibacterial heating layer 3 from bottom to top, and arrange the adjacent layers at different angles and directions, rotate each layer by 45°, and finally cut the edges, hot-melt bond them in a hot air oven, the hot-melt temperature is greater than 120°C, and the hot-melt is performed for 10 minutes; after completion, fix them with a sewing process to obtain a temperature-controlled self-heating wool flake thermal insulation material, which is sewn with different stitch patterns to enhance the firmness of the structure.

[0056] Example 8 A preparation process of a temperature-controlled self-heating wool flake thermal insulation material, comprising the following steps: Step 1, material selection: wool fiber diameter range is 24-35μm, length range is 35-65mm; phase change temperature regulating acrylic fiber is Tempsense fiber produced by Qingdao Bangte Company, with a diameter of 1.5D, a length of 38mm, and an enthalpy value of 15J. The phase change temperature regulating acrylic fiber is prepared by a microencapsulation method, and the phase change material is wrapped and sealed with a polymer to form a microcapsule, and the microcapsules containing the phase change material are blended with the polymer to obtain the obtained fiber; water-soluble polyvinyl alcohol fiber is a water-soluble fiber produced by Shandong Rongfeng Textile Co., Ltd., with a diameter of 2.2dtex, a length of 38 / 76mm, and water-soluble at 40°C; hollow antibacterial heating filament is an antibacterial heating hollow fiber produced by Shaoxing Xineng Textile Technology Co., Ltd., with a diameter of 75D and an average length of 40mm after cutting; the two-component sheath-core heterogeneous low-melting-point fiber is an ES composite fiber produced by Jiangsu Zhongshi Fiber Co., Ltd., with a diameter of 2D and an average length of 38mm.

[0057] Step 2, preparing the anti-transmission temperature control layer 1, the specific process is as follows: Step 2.1, treating part of the wool fibers selected in step 1 with acidic enzymes, using 3g / L of activator and 4g / L of acidic protease, and performing an impregnation treatment under weakly acidic conditions of 60°C and pH 6.5; effectively degrading the scale layer on the surface of the wool fibers and enhancing their moisture permeability. Subsequently, heat treatment is performed at 90°C to inactivate the acidic protease and ensure the deactivation of the enzyme; after washing with water to remove the residual enzyme and activator, drying is performed to obtain enzyme-treated moisture-permeable wool fibers; The phase-change temperature-adjusting acrylic fiber selected in step 1 is treated with 30-60 g / L of a waterproof and breathable finishing agent and 0-10 g / L of a cross-linking agent to obtain a waterproof and breathable phase-change temperature-adjusting acrylic fiber. The waterproof and breathable finishing agent is a water-soluble emulsified fluoride or a fluorocarbon polymer, which is a weak cationic type. A cross-linking agent may be added to enhance the bonding strength; Step 2.2, prepare the first layer of anti-transmission temperature-controlled fiber mesh 4, weigh the following components by mass percentage, 32% of waterproof, breathable, phase-change temperature-regulating acrylic fiber, 60% of enzyme-treated moisture-permeable wool fiber, and 8% of water-soluble polyvinyl alcohol fiber, the sum of the mass percentages of the above components is 100%, mix the weighed waterproof, breathable, phase-change temperature-regulating acrylic fiber and enzyme-treated moisture-permeable wool fiber evenly through an opener and a cotton box-type cotton blending machine, and then comb them together with the water-soluble polyvinyl alcohol fiber into a mesh through a carding machine, add the water-soluble polyvinyl alcohol fiber to the guide groove added at the feeding roller to achieve quantitative control of the water-soluble polyvinyl alcohol fiber, control the arrangement of the water-soluble polyvinyl alcohol fiber, add it in a linear arrangement, achieve precise control of the addition of the water-soluble polyvinyl alcohol fiber, and then achieve precise control of the pore arrangement, and finally lay the net through a web laying machine to form the first layer of anti-transmission temperature-controlled fiber mesh; Step 2.3, prepare the second layer of anti-transmission temperature control fiber mesh 5, weigh the following components respectively by mass percentage, waterproof breathable phase change temperature regulating acrylic fiber 30%, enzyme treated moisture permeable wool fiber 55%, water-soluble polyvinyl alcohol fiber 15%, the sum of the mass percentages of the above components is 100%, mix the weighed waterproof breathable phase change temperature regulating acrylic fiber and enzyme treated moisture permeable wool fiber evenly through an opener and a cotton box blending machine, and then comb them together with the water-soluble polyvinyl alcohol fiber into a mesh shape through a carding machine, and the water-soluble polyvinyl alcohol fiber is mixed into a mesh shape. The polyvinyl alcohol fiber is added to the guide groove added at the feeding roller to achieve quantitative control of the water-soluble polyvinyl alcohol fiber, control the arrangement of the water-soluble polyvinyl alcohol fiber, add it in a point-like arrangement, achieve precise control of the addition of the water-soluble polyvinyl alcohol fiber and then achieve precise control of the pore arrangement, and finally form a second layer of anti-transmission temperature control fiber net through a web laying machine. The amount of water-soluble polyvinyl alcohol fiber added in the second layer of anti-transmission temperature control fiber net 5 is more than that in the first layer of anti-transmission temperature control fiber net 4; Step 2.4, consolidating the first layer of anti-permeability temperature control fiber mesh and the second layer of anti-permeability temperature control fiber mesh by needle punching to form a double-layer composite anti-permeability temperature control flocculent sheet; Step 2.5, removing the water-soluble polyvinyl alcohol fiber in the double-layer composite anti-transmission temperature control flocculent sheet, the ratio of water to water-soluble polyvinyl alcohol fiber is 200:1, in actual preparation, the ratio range can be appropriately expanded according to the water absorption capacity of the remaining fibers, the aqueous solution is heated to the required temperature, and the water-soluble polyvinyl alcohol fiber is removed by washing; because the amount of water-soluble polyvinyl alcohol fiber added in the second layer of anti-transmission temperature control fiber net 5 is more than that in the first layer of anti-transmission temperature control fiber net 4, the double-layer composite anti-transmission temperature control flocculent sheet is Form a stepped pore distribution, stack the two layers into an air layer structure with a packaging film, place it in a mold, weigh polyol (agent A) and isocyanate (agent B), the ratio of the two reagents is 2:1, add isocyanate (agent B) to polyol (agent A) through a glass rod, stir quickly, and when the solution is slightly heated, quickly pour it into a polypropylene tray containing a double-layer composite anti-transmission temperature control flakes, and finally fill the pores with polyurethane foam. The thickness of the anti-transmission temperature control layer is 7mm and the surface density is 140g / m 2 .

[0058] Step 3, preparing the ultrafine fiber support layer 2, the specific process is as follows: Step 3.1, place the medical grade polylactic acid (PLA) powder in an 85°C dryer and dry it for 4 hours, then add it to a DCM (dichloromethane) and DMF (N,N-dimethylformamide) solvent with a volume ratio of 2:1 to form a mixed solution, then add the phase change microcapsules thereto, and then place it in a 37°C water bath, stir it at a constant speed with a magnetic stirrer for 5 hours, mix it evenly, and form a polymer solution, wherein the concentration of polylactic acid (PLA) is 10%, the concentration of phase change microcapsules is 5%, the particle size of the phase change microcapsules is 8μm, the shell material is polyurethane, and the core material is high-purity normal alkane paraffin. The phase change temperature of the phase change microcapsule is higher than the phase change temperature of the phase change material in the intelligent temperature-regulating acrylic fiber in the anti-transmission temperature control layer, forming a temperature gradient from the outside to the inside, ensuring more accurate and continuous temperature regulation in the variable ambient temperature; Step 3.2, the polylactic acid solution and the phase change microcapsule solution are mixed evenly to form a polymer solution, the polymer solution is electrospun to form ultrafine fibers with a diameter of 0.8 to 1 μm, and then woven into an ultrafine fiber support layer for interlayer support; Step 4, preparing the hollow antibacterial heating layer 3, the specific process is as follows: Step 4.1, first chlorinating the wool fiber with a 0.5% sodium hypochlorite solution, and then dechlorinating with 0.3% sodium carbonate and 0.1% sodium sulfite, thus completing the mercerization treatment to obtain mercerized wool fiber; Step 4.2, immersing the two-component sheath-core heterogeneous low-melting-point fiber in a low-melting-point polyethylene solution prepared from low-melting-point polyethylene powder, wherein the concentration of the low-melting-point polyethylene solution is 10%, and the pretreatment is completed. The external melting point of the fiber immersed in the low-melting-point polyethylene solution is reduced, and the melting point is controlled by controlling the melting temperature; The core and the cortex of the two-component sheath-core heterogeneous low-melting-point fiber have different melting points. The sheath and core of the two-component sheath-core heterogeneous low-melting-point fiber are concentric circle structures. The core 6 adopts low-melting-point copolyester fiber with a thermal melting temperature higher than 160°C, and the cortex 7 adopts low-melting-point copolyester fiber with a thermal melting temperature of 120-160°C. The diameter of the two-component sheath-core heterogeneous low-melting-point fiber is 1.5D-2D, and the average length is 38-51mm.

[0059] The melting point of low melting point polyethylene is 102°C and the average particle size is about 20 μm.

[0060] Step 4.3, weigh the following components respectively by mass percentage: 40% of hollow antibacterial heating filaments, 50% of mercerized wool fibers, and 10% of two-component sheath-core heterogeneous low-melting-point fibers immersed in a low-melting-point polyethylene solution. The sum of the mass percentages of the above components is 100%. The weighed mercerized wool fibers, hollow antibacterial heating filaments and two-component sheath-core heterogeneous low-melting-point fibers immersed in a low-melting-point polyethylene solution are mixed evenly to form a mixed interwoven structure, and then evenly combed into a mesh by a carding machine, and finally laid by a web laying machine to obtain a hollow antibacterial heating layer 3. The thickness of the hollow antibacterial heating layer is 7 mm and the surface density is 140 g / m 2 ; Step 5, evenly apply low melting point polyethylene solution on the upper layer of the anti-transmission temperature control layer 1 and the bottom layer of the hollow antibacterial heating layer 3, which can be applied multiple times, and then stack the anti-transmission temperature control layer 1, the ultrafine fiber support layer 2 and the hollow antibacterial heating layer 3 from bottom to top, and arrange the adjacent layers at different angles and directions, rotate each layer by 45°, and finally cut the edges, hot-melt bond them in a hot air oven, the hot-melt temperature is greater than 120°C, and the hot-melt is performed for 10 minutes; after completion, the sewing process is used to fix them, and different stitch patterns are used to enhance the firmness of the structure, and finally the temperature-controlled self-heating wool flake thermal insulation material is obtained.

Claims

1. Temperature-controlled self-heating wool flake thermal insulation material, characterized in that: The invention comprises an anti-transmission temperature control layer (1), an ultrafine fiber support layer (2) and a hollow antibacterial heating layer (3); the anti-transmission temperature control layer (1) and the hollow antibacterial heating layer (3) are arranged opposite to each other in upper and lower positions; the ultrafine fiber support layer (2) is located between the anti-transmission temperature control layer (1) and the hollow antibacterial heating layer (3); and the anti-transmission temperature control layer (1), the hollow antibacterial heating layer (3) and the ultrafine fiber support layer (2) are all bonded by low melting point polyethylene.

2. The temperature-controlled self-heating wool flake thermal insulation material according to claim 1, characterized in that: The thickness ratio of the anti-transmission temperature control layer (1), the ultrafine fiber support layer (2) and the hollow antibacterial heating layer (3) is 1-2:0.1-0.5:2-5, and the total surface density of the temperature-controlling self-heating wool flake thermal insulation material is 100g / m² to 400g / m².

3. The temperature-controlled self-heating wool flake thermal insulation material according to claim 1, characterized in that: The anti-permeability temperature control layer (1) is composed of enzyme-treated moisture-permeable wool fibers, waterproof breathable phase-change temperature-regulating acrylic fibers and polyurethane foam, wherein the waterproof breathable phase-change temperature-regulating acrylic fibers are embedded in the enzyme-treated moisture-permeable wool fibers, and the polyurethane foam is filled in the pores between the enzyme-treated moisture-permeable wool fibers and the waterproof breathable phase-change temperature-regulating acrylic fibers.

4. The preparation process of the temperature-controlled self-heating wool flake thermal insulation material according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1, preparing an anti-permeability temperature control layer (1), comprising uniformly combing enzyme-treated moisture-permeable wool fibers, waterproof and breathable phase-change temperature-regulating acrylic fibers and water-soluble fibers into a mesh structure by a carding machine, and then laying a mesh by a web laying machine to form an anti-permeability temperature control flocculent sheet, and then removing the water-soluble fibers to form a stepped pore distribution in the anti-permeability temperature control flocculent sheet, and finally filling the pores with polyurethane foam; Step 2, preparing an ultrafine fiber support layer (2), dissolving polylactic acid and phase change microcapsules in a solvent to form a polymer solution, wherein the concentration of polylactic acid is 8-14%, and the concentration of phase change microcapsules is 3-5%, and the polymer solution is subjected to electrostatic spinning to form ultrafine fibers with a diameter of 100 nm to 2 μm, which are then woven into an ultrafine fiber network, i.e., an ultrafine fiber support layer; Step 3, preparing the hollow antibacterial heating layer (3), uniformly mixing the mercerized wool fiber, the hollow antibacterial heating filament and the two-component core-skin heterogeneous low-melting-point fiber soaked in a low-melting-point polyethylene solution, combing the mixture into a mesh by a carding machine, and then laying the mesh by a web laying machine, thereby obtaining the hollow antibacterial heating layer (3); Step 4, evenly coating the upper layer of the anti-transmission temperature control layer (1) and the bottom layer of the hollow antibacterial heating layer (3) with a low melting point polyethylene solution, and then stacking the anti-transmission temperature control layer (1), the ultrafine fiber support layer (2) and the hollow antibacterial heating layer (3) layer by layer from bottom to top, using an arrangement method in which adjacent layers are arranged at different angles and directions, rotating each layer by 45°, and then cutting the edges, hot-melt bonding in a hot air oven, and finally fixing by a sewing process to obtain a temperature-controlled self-heating wool flake thermal insulation material.

5. The preparation process of the temperature-controlled self-heating wool flake thermal insulation material according to claim 4, characterized in that: The specific process of step 1 is as follows: Step 1.1, preparing a first layer of anti-permeability temperature-control fiber web (4), respectively weighing the following components by mass percentage: 20-40% of waterproof and breathable phase-change temperature-control acrylic fiber, 50-70% of enzyme-treated moisture-permeable wool fiber, and 5-10% of water-soluble fiber, the sum of the mass percentages of the above components being 100%, mixing the weighed waterproof and breathable phase-change temperature-control acrylic fiber and enzyme-treated moisture-permeable wool fiber evenly through an opener and a cotton box-type blending machine, and then combing them together with the water-soluble fiber into a mesh through a carding machine, adding the water-soluble fiber into a guide groove added at the feeding roller in a strip, dot or line arrangement, and finally laying the mesh through a web laying machine to form the first layer of anti-permeability temperature-control fiber web; Step 1.2, preparing a second layer of anti-transmission temperature-control fiber web (5), weighing the following components respectively by mass percentage: 20-40% of waterproof and breathable phase-change temperature-control acrylic fiber, 50-70% of enzyme-treated moisture-permeable wool fiber, and 10-15% of water-soluble fiber, the sum of the mass percentages of the above components being 100%, mixing the weighed waterproof and breathable phase-change temperature-control acrylic fiber and enzyme-treated moisture-permeable wool fiber evenly through an opener and a cotton box-type cotton blending machine, and then combing them together with the water-soluble fiber into a mesh through a carding machine, adding the water-soluble fiber into a strip, dot or line arrangement in the guide groove added at the feeding roller, and laying the mesh through a web laying machine to form a second layer of anti-transmission temperature-control fiber web, the amount of water-soluble polyvinyl alcohol fiber added to the second layer of anti-transmission temperature-control fiber web (5) is greater than the amount of water-soluble polyvinyl alcohol fiber added to the first layer of anti-transmission temperature-control fiber web (4); Step 1.3, consolidating the first layer of anti-permeability temperature-controlling fiber mesh (4) and the second layer of anti-permeability temperature-controlling fiber mesh (5) by needle punching to form a double-layer composite anti-permeability temperature-controlling flocculent sheet; Step 1.4, removing the water-soluble fibers in the double-layer composite anti-transmission temperature-controlling floccules, so as to form a stepped pore distribution in the double-layer composite anti-transmission temperature-controlling floccules, and then filling the pores with polyurethane foam.

6. The preparation process of the temperature-controlled self-heating wool flake thermal insulation material according to claim 5, characterized in that: The enzyme-treated moisture-permeable wool fiber is a wool fiber treated with an acidic enzyme, using 1-3 g / L of an activator and 2-4 g / L of an acidic protease, and performing an immersion treatment under weakly acidic conditions of 40-60° C. and a pH value of 5.5-6.5, and then performing a heat treatment under 70-90° C. to inactivate the acidic protease; finally, after washing with water to remove residual enzymes and the activator, a drying treatment is performed to obtain the enzyme-treated moisture-permeable wool fiber, and the water-soluble fiber is a water-soluble polyvinyl alcohol fiber.

7. The preparation process of the temperature-controlled self-heating wool flake thermal insulation material according to claim 5, characterized in that: The waterproof, breathable, phase-change, temperature-regulating acrylic fiber is a phase-change, temperature-regulating acrylic fiber that has been treated with a waterproof and breathable finishing agent of 30-60 g / L and a cross-linking agent of 0-10 g / L. The phase-change, temperature-regulating acrylic fiber is prepared by a microcapsule method, in which a phase-change material is wrapped and sealed with a polymer to form a microcapsule, and the microcapsules containing the phase-change material are blended and spun with a polymer. The phase-change temperature of the phase-change material in the phase-change, temperature-regulating acrylic fiber is lower than the phase-change temperature of the phase-change microcapsule, forming a phase-change temperature ladder arrangement.

8. The preparation process of the temperature-controlled self-heating wool flake thermal insulation material according to claim 5, characterized in that: In the step 3, the following components are weighed respectively by mass percentage: 10-40% of hollow antibacterial heating filaments, 50-80% of mercerized wool fibers, and 5-30% of two-component sheath-core heterogeneous low-melting-point fibers immersed in a low-melting-point polyethylene solution. The sum of the mass percentages of the above components is 100%. The weighed mercerized wool fibers, hollow antibacterial heating filaments and two-component sheath-core heterogeneous low-melting-point fibers immersed in a low-melting-point polyethylene solution are mixed evenly to form a mixed interwoven structure, which is then evenly combed into a mesh shape by a carding machine.

9. The preparation process of the temperature-controlled self-heating wool flake thermal insulation material according to claim 8, characterized in that: The mercerized wool fiber is a wool fiber that has been mercerized. The wool fiber is first chlorinated with a 0.2-0.5% sodium hypochlorite solution, and then dechlorinated with 0.1-0.3% sodium carbonate and 0.02-0.1% sodium sulfite to complete the mercerization treatment and obtain the mercerized wool fiber.

10. The preparation process of the temperature-controlled self-heating wool flake thermal insulation material according to claim 8, characterized in that: The sheath and core of the two-component sheath-core heterogeneous low-melting-point fiber are concentric circle structures. The core (6) uses fibers with a thermal melting temperature higher than 160°C, and the sheath (7) uses fibers with a thermal melting temperature of 120-160°C. The diameter of the two-component sheath-core heterogeneous low-melting-point fiber is 1.5D-2D, and the average length is 38mm-51mm.

Images