Cooling composite shielding fabric as well as preparation method and application thereof

Abstract

The invention provides a cooling composite shielding fabric as well as a preparation method and application thereof. The preparation method comprises the steps that S1, metal wires, artificial fiber inner cores and natural fiber yarns are adopted to prepare double-layer wrap yarns, and the double-layer wrap yarns are woven to obtain conductive cloth; s2, preparing a cooling conductive layer; the cooling conductive layer is provided with a first surface and a second surface which are oppositely arranged, and the cooling conductive layer comprises a radiation refrigeration layer and conductive cloth inserted into the radiation refrigeration layer; s3, forming a flame-retardant protective layer on the first surface of the cooling conductive layer; s4, covering the second surface of the cooling conductive layer with the knitted fabric base fabric to obtain the composite cooling shielding fabric. Through the double-layer wrap yarn structure that the metal wires wrap the artificial fiber inner core and the natural fiber yarn, and the composite design that the radiation refrigeration layer and the flame-retardant protective layer are combined, the efficient conductivity of the fabric is achieved, and the fabric is endowed with the excellent radiation refrigeration effect and protection performance.

Description

Technical Field

[0001] The present invention relates to the field of functional fabrics, and in particular to a cooling composite shielding fabric, a preparation method and application thereof. Background Art

[0002] When carrying out live maintenance work in special workplaces such as high-voltage transmission lines and converter stations, it is often necessary to carry out work in a high-temperature, strong sunlight environment. In order to prevent possible electric shock injuries to operators caused by the electric field, operators must wear shielding clothing. Shielding clothing is generally made of uniform conductor materials and fiber materials. In order to obtain sufficient shielding effect, the shielding clothing is thick and relatively closed. However, due to the influence of the high-temperature working environment, the body temperature of the workers rises, sweating increases, and they are prone to symptoms such as dehydration, heat stroke, dizziness, and palpitations, which in turn leads to reduced work efficiency and personnel safety. The cooling work clothes commonly used on the market generally achieve cooling by adding fans, and are not suitable for live workers in high-voltage transmission lines, converter stations, etc.

[0003] Passive radiation cooling technology is a new type of cooling technology with no energy consumption and no emissions. It uses the thermal radiation from the surface of an object to directly dissipate heat and achieve a cooling effect below the ambient temperature. This technology mainly relies on a special band in the atmosphere, namely the infrared window of 8 to 13 microns. This band has the lowest atmospheric radiation and the highest transmittance, and is the best channel for the thermal radiation from the surface of an object. This technology can effectively reflect sunlight, reduce the heat absorbed by the object, and at the same time increase the thermal emissivity of the surface of the object and improve the heat dissipation efficiency. This technology can be used to optimize and improve the fabric of the shielding suit so that it can take into account both cooling and shielding effects, thus better suited to a variety of working environments.

[0004] Based on this, how to provide a new type of composite shielding fabric with cooling function, which can take into account both cooling and electric field shielding functions while also having excellent tear resistance, is one of the important technical problems that need to be solved in this field. Summary of the invention

[0005] The main purpose of the present invention is to provide a cooling composite shielding fabric, a preparation method and application thereof, so as to solve the problem that shielding clothing fabrics in the prior art are difficult to have cooling function, electric field shielding effect and excellent tear resistance at the same time.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a preparation method of a composite cooling shielding fabric, comprising: step S1, winding and coating a metal wire on the outer surface of an artificial fiber inner core to form a metal wire-coated artificial fiber inner core, and then coating a natural fiber yarn on the outer surface of the metal wire-coated artificial fiber inner core to obtain a double-layer coated yarn, and the double-layer coated yarn is woven to obtain a conductive cloth; step S2, preparing a radiation refrigeration layer solution, and placing the conductive cloth in the radiation refrigeration layer solution for immersion, and obtaining a cooling conductive layer after a first drying, the cooling conductive layer having a first surface and a second surface arranged oppositely, and the cooling conductive layer includes a radiation refrigeration layer and a conductive cloth interspersed in the radiation refrigeration layer; step S3, preparing a flame retardant protective layer solution, and coating the flame retardant protective layer solution on the first surface of the cooling conductive layer, and forming a flame retardant protective layer on the first surface after a second drying; step S4, laminating the knitted fabric base fabric on the second surface of the cooling conductive layer to obtain a composite cooling shielding fabric.

[0007] Furthermore, the artificial fiber inner core is selected from one or more of spandex, rubber wire and polyolefin fiber, and the specification of the artificial fiber inner core is 1000D~2000D; and / or, the metal wire is selected from one or more of stainless steel wire, copper wire and silver wire, and the diameter of the metal wire is 20μm~50μm; and / or, the natural fiber yarn is selected from one or more of cotton yarn, wool yarn and linen yarn, and the specification of the natural fiber yarn is 20s / 2~40s / 2.

[0008] Furthermore, the radiation cooling layer solution comprises, by weight, 10 to 50 parts of a polymer, 40 to 60 parts of an organic solvent, 10 to 20 parts of inorganic nanoparticles, 1 to 10 parts of a silane coupling agent, and 1 to 5 parts of a first auxiliary agent; preferably, the inorganic nanoparticles are silicon dioxide nanoparticles and / or zinc oxide nanoparticles.

[0009] Furthermore, the polymer is selected from one or more of polyethyl methacrylate, polyacrylonitrile and polyvinylidene fluoride-hexafluoropropylene; and / or the organic solvent is N,N-dimethylformamide and / or acetone, preferably a mixed solvent of N,N-dimethylformamide and acetone, and the weight ratio of N,N-dimethylformamide to acetone is 1:(2-3); and / or the first auxiliary agent is selected from one or more of a first dispersant, a wetting agent, a first defoaming agent, an anti-cratering agent and a film-forming auxiliary agent.

[0010] Furthermore, in step S2, the temperature of the dipping and rolling is 50°C to 55°C, and the rolling rate is 80% to 90%; and the temperature of the first drying is 55°C to 60°C.

[0011] Furthermore, the flame retardant protective layer solution includes, by weight, 20 to 40 parts of a flame retardant, 10 to 20 parts of a reinforcing material, 40 to 50 parts of a film-forming agent and 1 to 5 parts of a second auxiliary agent; preferably, the reinforcing material is selected from one or more of nano-titanium boride, nano-silicon dioxide and aramid fiber.

[0012] Further, the flame retardant is selected from one or more of aluminum hydroxide, magnesium hydroxide and cyclic phosphate flame retardants, and the cyclic phosphate flame retardant is selected from one or more of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, bisphenol A-bis(diphenyl phosphate), resorcinol and trichloroethyl phosphate; and / or, the film-forming agent is acrylic resin and / or water-based polyurethane; preferably, it is a mixture of acrylic resin and water-based polyurethane, and the weight ratio of acrylic resin to water-based polyurethane is (1.8-2.0):1; and / or, the second auxiliary agent is selected from one or more of a plasticizer, a second defoaming agent and a second dispersant.

[0013] Furthermore, in step S3, the coating thickness is 50 μm to 200 μm; and the temperature of the second drying is 60° C. to 65° C.

[0014] A second aspect of the present invention provides a composite cooling shielding fabric, which is prepared by the above-mentioned preparation method of the composite cooling shielding fabric.

[0015] The third aspect of the present invention provides an application of the above-mentioned composite cooling shielding fabric as a shielding clothing fabric in the field of electrical engineering and power, and the shielding clothing includes a mask, a top, trousers and gloves.

[0016] By applying the technical solution of the present invention, a double-layer coated yarn structure of a metal wire-coated artificial fiber inner core and a natural fiber yarn is formed, combined with a composite design of a radiation cooling layer and a flame retardant protective layer, which not only achieves efficient electrical conductivity of the fabric, but also gives the fabric excellent radiation cooling effect and protective performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It is a schematic structural diagram of the composite cooling and shielding fabric provided in an embodiment of the present invention.

[0019] The symbols represent the following:

[0020] 10. Knitted base fabric; 20. Cooling conductive layer; 21. Radiant cooling layer; 22. Conductive fabric; 30. Flame retardant protective layer. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below in conjunction with the embodiments.

[0022] As described in the background art, the shielding clothing fabrics in the prior art have the problem of being difficult to simultaneously have cooling function, electric field shielding effect and excellent tear resistance. In order to solve the above technical problems, the first aspect of the present invention provides a preparation method of a composite cooling shielding fabric, comprising: step S1, winding and coating a metal wire on the outer surface of an artificial fiber inner core to form a metal wire-coated artificial fiber inner core, and then coating a natural fiber yarn on the outer surface of the metal wire-coated artificial fiber inner core to obtain a double-layer coated yarn, and the double-layer coated yarn is woven to obtain a conductive cloth; step S2, preparing a radiation refrigeration layer solution, and placing the conductive cloth in the radiation refrigeration layer solution for immersion, and obtaining a cooling conductive layer after a first drying, the cooling conductive layer having a first surface and a second surface arranged opposite to each other, and the cooling conductive layer includes a radiation refrigeration layer and a conductive cloth interspersed in the radiation refrigeration layer; step S3, preparing a flame retardant protective layer solution, and coating the flame retardant protective layer solution on the first surface of the cooling conductive layer, and forming a flame retardant protective layer on the first surface after a second drying; step S4, laminating the knitted fabric base fabric on the second surface of the cooling conductive layer to obtain a composite cooling shielding fabric.

[0023] The present invention adopts a double-layer coated yarn structure of a metal wire-coated artificial fiber inner core and a natural fiber yarn, combined with a composite design of a radiation cooling layer and a flame retardant protective layer, which not only achieves efficient electrical conductivity of the fabric, but also gives the fabric excellent radiation cooling effect and protective performance.

[0024] Specifically, for the conductive fabric formed by the double-layer coated yarn, since it contains metal wire, it can effectively improve the conductivity of the layer and effectively shield electromagnetic radiation. At the same time, the composite of the metal wire with the artificial fiber core and the natural fiber yarn, and the connection between the two, can effectively balance the mechanical properties, conductivity of the double-layer coated yarn and the subsequent conductive fabric, and the compatibility with the polymer solution in the subsequent steps, so that the conductive fabric can be inserted into the radiation cooling layer as a suitable functional reinforcement skeleton, and significantly improve the electric field shielding performance and cooling performance of the composite cooling shielding fabric in which it is located.

[0025] On this basis, the present invention further provides a flame retardant protective layer on one side surface of the cooling conductive layer, and utilizes the intrinsic protective effect of the flame retardant protective layer and the compatible synergistic effect with the cooling conductive layer to further improve the comprehensive performance of the obtained composite cooling shielding fabric, so that it can not only take into account the cooling function, electric field shielding effect and excellent tear resistance, but also show good protective isolation performance.

[0026] In actual applications, the base fabric of knitted fabric is generally pure cotton knitted fabric with sweat absorption and breathability functions. It can also be replaced by fabrics implanted with cooling factors, such as menthol fiber, or fabrics made of fiber materials with high thermal conductivity and specific heat capacity, such as polyester and nylon blends, and fabrics made of polyurethane fibers.

[0027] Of course, in addition to the intrinsic functions and properties of the above-mentioned layers prepared by the present invention, what is more important is that through the excellent compatibility between them, the above-mentioned conductive fabric, radiation cooling layer, flame retardant protective layer, and knitted fabric base fabric can be used as a complete and continuous overall composite cooling shielding fabric, and exhibit excellent comprehensive performance.

[0028] In several typical embodiments, the man-made fiber core is selected from one or more of spandex, rubber yarn and polyolefin fiber, and the specification of the man-made fiber core is 1000D-2000D; and / or, the metal wire is selected from one or more of stainless steel wire, copper wire and silver wire, and the diameter of the metal wire is 20μm-50μm; and / or, the natural fiber yarn is selected from one or more of cotton yarn, wool yarn and linen yarn, and the specification of the natural fiber yarn is 20s / 2-40s / 2. The rubber yarn is elastic rubber yarn, and the polyolefin fiber is polyolefin elastic fiber. The preferred double-layer coated yarn raw material can better improve the softness and comfort of the resulting conductive fabric, and can also comprehensively improve its conductivity and liquid absorption, so that it can be composited into the radiation refrigeration layer with a functional enhanced skeleton with excellent electric field shielding effect, thereby effectively improving the electric field shielding performance and cooling capacity of the resulting composite cooling shielding fabric.

[0029] Furthermore, after a large number of experiments, the inventors found that the radiation refrigeration layer solution preferably includes 10 to 50 parts of polymer, 40 to 60 parts of organic solvent, 10 to 20 parts of inorganic nanoparticles, 1 to 10 parts of silane coupling agent and 1 to 5 parts of the first auxiliary agent by weight, and a radiation refrigeration layer with superior radiation refrigeration performance is obtained under this formula. At the same time, when the radiation refrigeration layer with this ingredient formula is compounded with a conductive fabric, the compatibility and coordination between the two are higher, and ultimately the comprehensive performance of the resulting composite cooling shielding fabric is higher. At the same time, for inorganic nanoparticles, it is preferred that they are silicon dioxide nanoparticles and / or zinc oxide nanoparticles, so that while the overall radiation refrigeration layer solution formula improves the cooling capacity, it also plays a reinforcing role, thereby making the resulting cooling conductive layer and composite cooling shielding fabric have higher mechanical properties and stronger tear resistance.

[0030] In several typical embodiments, in order to further improve the uniformity and stability of the cured radiation refrigeration layer, thereby further improving the cooling effect and service life of the obtained fabric, the polymer is preferably selected from one or more of polyethyl methacrylate, polyacrylonitrile and polyvinylidene fluoride-hexafluoropropylene; and / or the organic solvent is N,N-dimethylformamide and / or acetone; and / or the first auxiliary agent is selected from one or more of a first dispersant, a wetting agent, a first defoaming agent, an anti-cratering agent and a film-forming auxiliary agent.

[0031] And, for the organic solvent, it is preferably a mixed solvent of N,N-dimethylformamide and acetone, and the weight ratio of N,N-dimethylformamide to acetone is 1:(2-3). This organic solvent combination selected through a large number of experiments can better promote the combination of inorganic nanoparticles and polymers, as well as the composite of the radiation cooling layer as a whole and the conductive fabric, forming a more compact cooling conductive layer, and ultimately improving the cooling performance of the resulting composite cooling shielding fabric.

[0032] In practical applications, the first dispersant may be selected from the types of DisperBYK-111, Solsperse 24000, EfkaPX 4350 and TEGO Dispers 755W; the wetting agent may be selected from the types of TEGO Wet 280, BYK-348, Surfynol 104 and Dynol 960; the first defoaming agent may be selected from the types of BYK-033, TEGO Airex 990, AFCONA-2722 and Tego Foamex 810; the anti-cratering agent may be selected from the types of TEGO Glide 450, BYK-310, Modaflow Resin and Borchi Gol 1470; and the film-forming aid may be selected from the types of Texanol, OE-300, DPNB and LOCA WI-6; but it is not limited to the above types.

[0033] It should be explained in advance that padding is a textile processing technology, and its operating steps include immersing the fabric in a solution and fully absorbing the solution, and then passing the soaked fabric through a roller to remove excess solution and make the solution evenly distributed on the surface of the fabric. The liquid filling rate refers to the proportion of the solution absorbed by the fabric during the padding process, and its calculation formula is: (the weight of the solution of the fabric after padding - the weight of the solution of the fabric before padding) / the weight of the solution of the fabric before padding × 100%.

[0034] As for the step of inserting the conductive fabric into the radiation cooling layer by padding in the present invention, i.e., step S2, the inventor has selected the padding temperature of 50°C to 55°C and the liquid padding rate of 80% to 90% after a large number of experiments, so that the radiation cooling layer solution can better infiltrate the conductive fabric, so as to obtain a more uniform and stable cooling conductive layer, thereby improving the cooling performance of the obtained composite cooling shielding fabric. And the first drying temperature is preferably 55°C to 60°C, so as to improve the curing effect of the radiation cooling layer, promote its closer combination with the conductive fabric, and finally improve the comprehensive performance of the obtained composite cooling shielding fabric as an important functional component.

[0035] In several typical implementations, the flame retardant protective layer solution includes 20-40 parts of flame retardant, 10-20 parts of reinforcing material, 40-50 parts of film-forming agent and 1-5 parts of second auxiliary agent by weight. The addition of the flame retardant protective layer with the above formula, when it is cured, can not only improve the flame retardant properties of the resulting fabric, but also better cooperate with the already formed cooling conductive layer, and synergistically enhance the mechanical properties of the resulting composite cooling shielding fabric, especially the tear resistance.

[0036] And in order to further improve the tear resistance of the obtained fabric, the reinforcing material is preferably selected from one or more of nano titanium boride, nano silicon dioxide and aramid fiber.

[0037] Further, the flame retardant is selected from one or more of aluminum hydroxide, magnesium hydroxide and cyclic phosphate flame retardants, and the cyclic phosphate flame retardant is selected from one or more of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), bisphenol A-bis(diphenyl phosphate) (BDP), resorcinol (RDP) and trichloroethyl phosphate (TCEP); and / or, the film-forming agent is acrylic resin and / or waterborne polyurethane; and / or, the second auxiliary agent is selected from one or more of plasticizer, second defoamer and second dispersant. The above-mentioned types of components can be better matched with each other, so as to provide better flame retardant protection and mechanical reinforcement effect without affecting the air permeability and comfort of the fabric.

[0038] On this basis, in order to form a tougher and more flexible flame retardant protective layer to improve the tear resistance of the resulting fabric while optimizing its fit, the inventors, after a large number of experiments, preferably selected a mixture of acrylic resin and waterborne polyurethane as the film-forming agent, and the weight ratio of acrylic resin to waterborne polyurethane was (1.8-2.0):1.

[0039] In practical applications, the plasticizer may be selected from the types of diisononyl phthalate (DINP), dioctyl terephthalate (DOTP), dioctyl phthalate (DOP) and trioctyl trimellitate (TOTM); the second defoamer may be selected from the types of TEGO Airex 902W, BYK-1790, AFCONA-2020 and TEGO Foamex N; the second dispersant may be selected from the types of DisperBYK-180, TEGO Dispers 670, Solsperse 20000 and Efka FA 4611; but it is not limited to the above types.

[0040] In several typical implementations, the coating thickness in step S3 is preferably 50 μm to 200 μm, and the temperature of the second drying is 60° C. to 65° C. Such control of process parameters can improve the structural uniformity and stability of the flame retardant protective layer obtained by curing, and reduce the performance degradation caused by too thick or too thin coating. At the same time, the temperature setting of the second drying can more effectively promote the curing of the flame retardant protective layer material and the compounding with the cooling conductive layer to form a compact overall structure, thereby further improving the flame retardancy and mechanical strength of the obtained fabric.

[0041] The second aspect of the present invention provides a composite cooling shielding fabric, which is prepared by the above-mentioned composite cooling shielding fabric preparation method. The obtained fabric not only has excellent electrical conductivity, can effectively shield electromagnetic radiation, and protect electricians and power workers from electromagnetic harm, but also its composite design of radiation cooling layer and flame retardant protective layer can provide effective cooling effect and flame retardant protection in high temperature environment.

[0042] The third aspect of the present invention provides an application of the above-mentioned composite cooling shielding fabric as a shielding clothing fabric in the field of electrical engineering and power, and the shielding clothing includes a mask, a top, trousers and gloves.

[0043] The present invention obtains a fabric with excellent radiation cooling effect, electric field shielding effect and tear resistance effect through a double-layer coated yarn structure of a metal wire-coated artificial fiber inner core and a natural fiber yarn, combined with a composite design of a radiation cooling layer and a flame retardant protective layer. When it is used as a shielding clothing fabric in the electrical and power field, it can effectively reduce the body temperature of workers in a high temperature environment and improve their comfort and safety. At the same time, because the composite cooling shielding fabric provided by the present invention has good flame retardancy and mechanical strength, it significantly improves the working efficiency and protection level.

[0044] The present application is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed in the present application.

[0045] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0046] Example 1

[0047] A preparation method of a composite cooling shielding fabric:

[0048] Step S1, preparing a conductive fabric, using pure cotton yarn (20s / 2), stainless steel wire (diameter 30μm), spandex elastic wire (1500D), and the manufacturing method is to use 1500D spandex elastic wire as the core layer, evenly wind the stainless steel wire on the spandex wire to form an inner coating layer, and then evenly wind 20s / 2 pure cotton yarn on the spandex elastic wire and the stainless steel wire to form an outer coating layer. Use pure cotton yarn with lower elasticity in the warp direction, use the obtained double-layer coated yarn in the weft direction, and use a twill (two up and two down) structure weaving method to obtain a conductive fabric.

[0049] Step S2, preparing a radiation refrigeration layer solution: the materials used are polymer: polyacrylonitrile (mass fraction 30%), organic solvent: N,N-dimethylformamide / acetone (weight ratio 3:7, total mass fraction 45%), additives: zinc oxide nanoparticles (mass fraction 15%), interface agent: KF-550 (mass fraction 5%), additives: 1% first dispersant DisperBYK-111, 1% wetting agent TEGOWet280, 1% first defoaming agent BYK-033, 1% anti-cratering agent TEGO Glide40, 1% film-forming additive OE-300 (total mass fraction 5%).

[0050] Rolling: At room temperature, use a stirrer to stir the radiation cooling layer solution for 10 hours, then place the conductive fabric in the radiation cooling layer solution for rolling, the temperature is 50°C, the rolling rate is 80%, and then high-temperature drying (60°C) is performed to obtain a cooling conductive layer, which includes a solidified radiation cooling layer and a conductive fabric interspersed inside the radiation cooling layer.

[0051] Step S3, preparing a flame retardant protective layer solution: the materials used are flame retardant: magnesium hydroxide (mass fraction 30%), reinforcing material: nano silicon dioxide (mass fraction 15%), film-forming agent: acrylic resin / aqueous polyurethane (weight ratio 2:1, total mass fraction 45%), additives: 0.6% plasticizer DINP, 0.7% second defoamer TEGO Airex902W, 0.7% second dispersant DisperBYK-180 (total 2%).

[0052] Coating: At room temperature, use a stirrer to stir the flame retardant protective layer solution for 10 hours, then apply the flame retardant protective layer solution on one side of the cooling conductive layer with a coating thickness of 150 μm, and then dry it at high temperature (60°C) to obtain a semi-finished composite layer formed by the flame retardant protective layer and the cooling conductive layer.

[0053] Step S4: Use a coating machine to evenly coat the polyurethane adhesive AH-1704-1 on the other side of the cooling conductive layer without the flame retardant protective layer, with a coating thickness of 0.15 mm, and then preliminarily press the sweat-absorbent breathable knitted fabric base and the semi-finished composite layer together. Then use a hot air oven, set the temperature to 70°C, and dry for 45 minutes to completely cure the adhesive. Finally, rinse, dry, roll, and cut into the required shape to obtain a composite cooling shielding fabric, the structural diagram of which is shown in the figure. Figure 1 shown.

[0054] Example 2

[0055] A preparation method of a composite cooling shielding fabric:

[0056] Step S1, preparing a conductive fabric, using pure cotton yarn (30s / 2), copper wire (diameter 30μm), spandex elastic wire (1000D), and the manufacturing method is to use 1000D spandex elastic wire as the core layer, evenly wind the copper wire on the spandex wire to form an inner coating layer, and then evenly wind 30s / 2 pure cotton yarn on the spandex elastic wire and the copper wire to form an outer coating layer. Use pure cotton yarn with lower elasticity in the warp direction, use the obtained double-layer coated yarn in the weft direction, and use a twill (two up and two down) structure weaving method to obtain a conductive fabric.

[0057] Step S2, preparing a radiation refrigeration layer solution: the materials used are polymer: polyvinylidene fluoride-hexafluoropropylene (mass fraction 30%), organic solvent: N,N-dimethylformamide / acetone (weight ratio 3:7, total mass fraction 40%), additive silica nanoparticles (mass fraction 15%), interface agent: KF-550 (mass fraction 8%), additives: 0.4% first dispersant Solsperse 24000, 0.4% wetting agent TEGO Wet 280, 0.4% first defoaming agent BYK-033, 0.4% anti-cratering agent BYK-310, 0.4% film-forming aid Texanol (total mass fraction 2%).

[0058] Rolling: At room temperature, use a stirrer to stir the radiation cooling layer solution for 10 hours, then place the conductive fabric in the radiation cooling layer solution for rolling, the temperature is 50°C, the rolling rate is 80%, and then high-temperature drying (60°C) is performed to obtain a cooling conductive layer, which includes a solidified radiation cooling layer and a conductive fabric interspersed inside the radiation cooling layer.

[0059] Step S3, preparing a flame retardant protective layer solution: the materials used are flame retardant: cyclic phosphate flame retardant TCEP (mass fraction 35%), reinforcing material: nano titanium boride (mass fraction 15%), film-forming agent: acrylic resin / aqueous polyurethane (weight ratio 2:1, total mass fraction 45%), additives: 0.6% plasticizer DOP, 0.7% second defoamer BYK-1790, 0.7% second dispersant TEGO Dispers 670 (total 2%).

[0060] Coating: At room temperature, use a stirrer to stir the flame retardant protective layer solution for 10 hours, then apply the flame retardant protective layer solution on one side of the cooling conductive layer with a coating thickness of 200 μm, and then dry it at high temperature (60°C) to obtain a semi-finished composite layer formed by the flame retardant protective layer and the cooling conductive layer.

[0061] Step S4: Use a coating machine to evenly coat the polyurethane adhesive AH-1704-1 on the other side of the cooling conductive layer without the flame retardant protective layer, with a coating thickness of 0.15 mm, and then preliminarily press the sweat-absorbent breathable knitted fabric base and the semi-finished composite layer together. Then use a hot air oven with a temperature set to 70°C and a drying time of 45 minutes to completely cure the adhesive, and finally rinse, dry, roll, and cut into a desired shape to obtain a composite cooling shielding fabric.

[0062] Example 3

[0063] A preparation method of a composite cooling shielding fabric:

[0064] Step S1, preparing a conductive fabric, using pure cotton yarn (25s / 2), silver wire (diameter 25μm), spandex elastic thread (2000D), and the manufacturing method is to use 2000D spandex elastic thread as the core layer, evenly wind the silver wire on the spandex thread to form an inner coating layer, and then evenly wind 25s / 2 pure cotton yarn on the spandex elastic thread and the silver wire to form an outer coating layer. Use pure cotton yarn with lower elasticity in the warp direction, use the obtained double-layer coated yarn in the weft direction, and adopt a twill (two up and two down) structure weaving method to obtain a conductive fabric.

[0065] Step S2, preparing a radiation refrigeration layer solution: the materials used are polymer: polyethyl methyl acrylate (mass fraction 35%), organic solvent: N, N-dimethylformamide / acetone (weight ratio 3:7, total mass fraction 40%), additive silica nanoparticles (mass fraction 15%), interface agent: KF-550 (mass fraction 7%), additives: 0.6% first dispersant Efka PX 4350, 0.6% wetting agent BYK-348, 0.6% first defoamer AFCONA-2722, 0.6% anti-crater agent BYK-310, 0.6% film-forming aid DPNB (total mass fraction 3%).

[0066] Rolling: At room temperature, use a stirrer to stir the radiation cooling layer solution for 10 hours, then place the conductive fabric in the radiation cooling layer solution for rolling, the temperature is 50°C, the rolling rate is 90%, and then high-temperature drying (60°C) is performed to obtain a cooling conductive layer, which includes a solidified radiation cooling layer and a conductive fabric interspersed inside the radiation cooling layer.

[0067] Step S3, preparing a flame retardant protective layer solution: the materials used are flame retardant: magnesium hydroxide (CAS No. 1309-42-8, mass fraction 25%), reinforcing material: aramid fiber (mass fraction 20%), film-forming agent: acrylic resin / aqueous polyurethane (weight ratio 2:1, total mass fraction 40%), additives: 1.6% plasticizer TOTM, 1.7% second defoamer TEGO FoamexN, 1.6% second dispersant Solsperse 20000 (total 5%).

[0068] Coating: At room temperature, use a stirrer to stir the flame retardant protective layer solution for 10 hours, then apply the flame retardant protective layer solution on one side of the cooling conductive layer with a coating thickness of 50 μm, and then dry it at high temperature (60°C) to obtain a semi-finished composite layer formed by the flame retardant protective layer and the cooling conductive layer.

[0069] Step S4: Use a coating machine to evenly coat the polyurethane adhesive AH-1704-1 on the other side of the cooling conductive layer without the flame retardant protective layer, with a coating thickness of 0.15 mm, and then preliminarily press the sweat-absorbent breathable knitted fabric base and the semi-finished composite layer together. Then use a hot air oven with a temperature set to 70°C and a drying time of 45 minutes to completely cure the adhesive, and finally rinse, dry, roll, and cut into a desired shape to obtain a composite cooling shielding fabric.

[0070] Example 4

[0071] A preparation method of a composite cooling shielding fabric:

[0072] The only difference between this embodiment and embodiment 1 is that the material performance parameters used to prepare the conductive fabric are different, specifically, the materials used are pure cotton yarn (15s / 2), stainless steel wire (diameter 60 μm), and spandex elastic thread (500D).

[0073] Example 5

[0074] A preparation method of a composite cooling shielding fabric:

[0075] The only difference between this embodiment and embodiment 1 is that the material performance parameters used to prepare the conductive fabric are different, specifically, the materials used are pure cotton yarn (45s / 2), stainless steel wire (diameter 15 μm), and spandex elastic thread (2500D).

[0076] Example 6

[0077] A preparation method of a composite cooling shielding fabric:

[0078] The only difference between this embodiment and embodiment 1 is that the mass fractions of the materials used to prepare the radiation refrigeration layer solution are different, specifically: polymer: polyacrylonitrile (mass fraction 5%), organic solvent: N,N-dimethylformamide / acetone (weight ratio 3:7, total mass fraction 65%), additive: zinc oxide nanoparticles (mass fraction 5%), interface agent: KF-550 (mass fraction 15%), additives: 2% dispersant, 2% wetting agent, 2% defoaming agent, 2% anti-cratering agent, 2% film-forming aid (total mass fraction 10%).

[0079] Example 7

[0080] A preparation method of a composite cooling shielding fabric:

[0081] The only difference between this embodiment and embodiment 1 is that the mass fractions of materials used to prepare the radiation refrigeration layer solution are different, specifically: polymer: polyacrylonitrile (mass fraction 55%), organic solvent: N,N-dimethylformamide / acetone (weight ratio 3:7, total mass fraction 20%), additive: zinc oxide nanoparticles (mass fraction 24%), interface agent: KF-550 (mass fraction 0.5%), additives: 0.1% dispersant, 0.1% wetting agent, 0.1% defoaming agent, 0.1% anti-cratering agent, 0.1% film-forming aid (total mass fraction 0.5%).

[0082] Example 8

[0083] A preparation method of a composite cooling shielding fabric:

[0084] The difference between this embodiment and embodiment 1 is that the rolling conditions in step S2 are different. Specifically, the conductive fabric is placed in the radiation cooling layer solution for rolling at a temperature of 40° C. and a rolling rate of 95%, and then dried at a high temperature (50° C.) to obtain a cooling conductive layer.

[0085] Example 9

[0086] A preparation method of a composite cooling shielding fabric:

[0087] The difference between this embodiment and embodiment 1 is that the rolling conditions in step S2 are different. Specifically, the conductive fabric is placed in the radiation cooling layer solution for rolling at a temperature of 60° C. and a rolling rate of 75%, and then dried at a high temperature (65° C.) to obtain a cooling conductive layer.

[0088] Example 10

[0089] A preparation method of a composite cooling shielding fabric:

[0090] The only difference between this embodiment and embodiment 1 is that the mass fractions of the materials used to prepare the flame retardant protective layer solution are different, specifically: magnesium hydroxide (mass fraction 64.7%), reinforcing material: nano silicon dioxide (mass fraction 0%), film-forming agent: acrylic resin / aqueous polyurethane (weight ratio 2:1, total mass fraction 35%), additives: 0.1% plasticizer, 0.1% defoamer, 0.1% dispersant (total 0.3%).

[0091] Embodiment 11

[0092] A preparation method of a composite cooling shielding fabric:

[0093] The only difference between this embodiment and embodiment 1 is that the mass fractions of the materials used to prepare the flame retardant protective layer solution are different, specifically: magnesium hydroxide (mass fraction 12%), reinforcing material: nano silicon dioxide (mass fraction 25%), film-forming agent: acrylic resin / aqueous polyurethane (weight ratio 2: 1, total mass fraction 54%), additives: 3% plasticizer, 3% defoamer, 3% dispersant (total 8%).

[0094] Example 12

[0095] A preparation method of a composite cooling shielding fabric:

[0096] The only difference between this embodiment and embodiment 1 is that the coating conditions in step S3 are different. Specifically, the flame retardant protective layer solution is coated on one side surface of the cooling conductive layer with a coating thickness of 40 μm, and then dried at high temperature (70°C) to obtain a semi-finished composite layer formed by the flame retardant protective layer and the cooling conductive layer.

[0097] Embodiment 13

[0098] A preparation method of a composite cooling shielding fabric:

[0099] The only difference between this embodiment and embodiment 1 is that the coating conditions in step S3 are different. Specifically, the flame retardant protective layer solution is coated on one side surface of the cooling conductive layer with a coating thickness of 220 μm, and then dried at high temperature (55°C) to obtain a semi-finished composite layer formed by the flame retardant protective layer and the cooling conductive layer.

[0100] Comparative Example 1

[0101] A preparation method of a composite cooling shielding fabric:

[0102] The only difference between this comparative example and Example 1 is that no flame retardant protective layer is provided.

[0103] Comparative Example 2

[0104] A preparation method of a composite cooling shielding fabric:

[0105] The only difference between this comparative example and Example 1 is that when preparing the conductive fabric, no double-layer coated yarn is prepared, but pure cotton yarn is used in both the warp and weft directions to obtain the conductive fabric after weaving.

[0106] Comparative Example 3

[0107] A preparation method of a composite cooling shielding fabric:

[0108] The only difference between this comparative example and Example 1 is that when preparing the conductive fabric, no double-layer coated yarn is prepared, but pure cotton yarn with lower elasticity is used in the warp direction, and a spandex elastic thread core is directly used in the weft direction to obtain the conductive fabric after weaving.

[0109] Test Method

[0110] Cooling capacity (℃): In a sunny environment with a perceived temperature of 30℃ to 40℃, each sample and 32-count, 133*72-density, plain-weave cotton fabric were placed outdoors without shelter. The temperature sensor was used to test the sample surface temperature T1 and the ordinary fabric surface temperature T0 every hour within 10 hours, and the difference T between the two was calculated, T=T0-T1. The maximum value of T was taken as the index value for evaluating the cooling capacity of each sample. The larger the value, the greater the decrease in the sample surface temperature relative to the ordinary fabric surface temperature, that is, the stronger the cooling capacity of the corresponding sample.

[0111] Electric field shielding capability: tested in accordance with GB / T 6568-2008 “Shielding clothing for live working”.

[0112] Tear resistance: tested according to GB / T 6568-2008 "Shielding clothing for live working".

[0113] Table 1

[0114]

[0115]

[0116] From the above description, it can be seen that the above-mentioned embodiments of the present invention realize the preparation of composite cooling and shielding fabrics with excellent performance. The obtained composite cooling and shielding fabrics not only have excellent cooling ability and electric field shielding ability, but also show good tear resistance, thereby being able to meet the use requirements of various fields.

[0117] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those described herein, for example.

[0118] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a composite cooling shielding fabric, characterized in that: include: Step S1, winding and coating the metal wire on the outer surface of the artificial fiber inner core to form the metal wire coated artificial fiber inner core, and then coating the natural fiber yarn on the outer surface of the metal wire coated artificial fiber inner core to obtain a double-layer coated yarn, and weaving the double-layer coated yarn to obtain a conductive fabric; Step S2, preparing a radiation cooling layer solution, and placing the conductive fabric in the radiation cooling layer solution for immersion and rolling, and obtaining a cooling conductive layer after a first drying; The cooling conductive layer has a first surface and a second surface that are arranged opposite to each other, and the cooling conductive layer includes a radiation cooling layer and the conductive fabric interspersed in the radiation cooling layer; Step S3, preparing a flame retardant protective layer solution, and coating the flame retardant protective layer solution on the first surface of the temperature-reducing conductive layer, and forming a flame retardant protective layer on the first surface after a second drying; Step S4, laminating the knitted fabric base fabric on the second surface of the cooling conductive layer to obtain the composite cooling shielding fabric.

2. The method for preparing the composite cooling shielding fabric according to claim 1, characterized in that: The man-made fiber inner core is selected from one or more of spandex, rubber yarn and polyolefin fiber, and the specification of the man-made fiber inner core is 1000D-2000D; and / or, The metal wire is selected from one or more of stainless steel wire, copper wire and silver wire, and the diameter of the metal wire is 20 μm to 50 μm; and / or, The natural fiber yarn is selected from one or more of cotton yarn, wool yarn and linen yarn, and the specification of the natural fiber yarn is 20s / 2 to 40s / 2.

3. The method for preparing the composite cooling shielding fabric according to claim 1 or 2, characterized in that: The radiation cooling layer solution comprises, by weight, 10 to 50 parts of a polymer, 40 to 60 parts of an organic solvent, 10 to 20 parts of inorganic nanoparticles, 1 to 10 parts of a silane coupling agent, and 1 to 5 parts of a first auxiliary agent; Preferably, the inorganic nanoparticles are silicon dioxide nanoparticles and / or zinc oxide nanoparticles.

4. The method for preparing the composite cooling shielding fabric according to claim 3, characterized in that: The polymer is selected from one or more of polyethyl methacrylate, polyacrylonitrile and polyvinylidene fluoride-hexafluoropropylene; and / or, The organic solvent is N,N-dimethylformamide and / or acetone, preferably a mixed solvent of N,N-dimethylformamide and acetone, and the weight ratio of the N,N-dimethylformamide to the acetone is 1:(2-3); and / or, The first auxiliary agent is selected from one or more of a first dispersant, a wetting agent, a first defoaming agent, an anti-cratering agent and a film-forming auxiliary agent.

5. The method for preparing the composite cooling shielding fabric according to any one of claims 1 to 4, characterized in that: In step S2, The padding temperature is 50°C to 55°C, and the padding rate is 80% to 90%; The temperature of the first drying is 55°C to 60°C.

6. The method for preparing the composite cooling shielding fabric according to any one of claims 1 to 5, characterized in that: The flame retardant protective layer solution includes 20 to 40 parts of a flame retardant, 10 to 20 parts of a reinforcing material, 40 to 50 parts of a film-forming agent, and 1 to 5 parts of a second auxiliary agent by weight. Preferably, the reinforcing material is selected from one or more of nano titanium boride, nano silicon dioxide and aramid fiber.

7. The method for preparing the composite cooling shielding fabric according to claim 6, characterized in that: The flame retardant is selected from one or more of aluminum hydroxide, magnesium hydroxide and cyclic phosphate flame retardants, and the cyclic phosphate flame retardant is selected from one or more of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, bisphenol A-bis(diphenyl phosphate), resorcinol and trichloroethyl phosphate; and / or, The film-forming agent is an acrylic resin and / or an aqueous polyurethane; preferably a mixture of an acrylic resin and an aqueous polyurethane, and the weight ratio of the acrylic resin to the aqueous polyurethane is (1.8-2.0):1; and / or, The second auxiliary agent is selected from one or more of a plasticizer, a second defoaming agent and a second dispersant.

8. The method for preparing the composite cooling shielding fabric according to any one of claims 1 to 7, characterized in that: In step S3, The coating thickness of the coating is 50 μm to 200 μm; The temperature of the second drying is 60°C to 65°C.

9. A composite cooling shielding fabric, characterized in that: The composite cooling and shielding fabric is prepared by the preparation method of the composite cooling and shielding fabric according to any one of claims 1 to 8.

10. An application of the composite cooling shielding fabric according to claim 9 as a shielding clothing fabric in the field of electrical engineering and power, characterized in that: The shielding clothing includes a mask, a coat, pants or gloves.

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