601 results about "Moisture permeability" patented technology

The invention discloses a food-grade high-temperature-resistant coating and a preparation method thereof. The high-temperature-resistant coating is prepared from 60-75% of matrix resin, 18-28% of surface hydrophobic modified nano functional filler and 10-20% of auxiliaries, and the nano functional filler is prepared from 10-15% of nano silicon dioxide, 5-8% of nano aluminum oxide and 3-5% of nano titanium dioxide. According to the food-grade high-temperature-resistant coating and the preparation method thereof, surface hydrophobic modification is carried out on nano particles through a silane coupling agent, the compatibility and dispersion stability of the nano particles in a resin matrix are remarkably improved, coating defects caused by agglomeration at high temperature are avoided, a hydrophobic barrier is formed by the modified nano filler, the moisture permeability is reduced, and the high-temperature-resistant performance of the food-grade high-temperature-resistant coating is improved. And the damp-heat aging resistance of the coating is enhanced.

Structural insulated wall and roof sheathing systems for use in building construction designed to provide a structural building envelope that is moisture permeable but protects from bulk water, excess air, and thermal transfer.

A strain gauge includes a flexible substrate; a resistor made from a film containing Cr, CrN, and Cr2N, on one surface of the substrate; and a resin barrier layer covering the resistor, and, in this strain gauge, in the barrier layer, a ratio of a moisture permeability (g / m2 / 24h) to a thickness (mm) is 5:1 or greater, and the thickness of the barrier layer is 100 μm or more and 3 mm or less.

The invention discloses a bio-based PHA oil-resistant and moisture-permeable coating for hamburger paper, coated paper and a preparation method, and belongs to the technical field of bio-based high polymer materials and paper-based food packaging. The coating is a PHA aqueous dispersion, and mainly comprises a semi-crystalline matrix PHA and a low-crystallinity or amorphous toughening PHA. The core of the coating is that after the coating is dried to form a film, a functional gradient structure can be spontaneously formed in the thickness direction of the coating: an interface layer close to a paper base is rich in toughening PHA so as to enhance toughness and adhesive force; and the surface layer of the coating is rich in matrix PHA so as to maximize the oil resistance. By means of the functional gradient structural design, the packaging material integrates oil resistance, moisture permeability and flexibility of the packaging material, has the degradable environment-friendly characteristic and is suitable for packaging high-grease food.

The invention relates to the technical field of preparation of polyurethane gloves, in particular to an innovative preparation method of waterproof and moisture-permeable polyurethane gloves with remarkably improved waterproof, moisture-permeable and mechanical properties, which comprises the steps of lining finishing, drying after dipping in a coagulator, drying after dipping in a polyurethane foaming slurry, drying after dipping in a polyurethane slurry, and drying after dipping in a particle slurry. In the process of drying the hand mold after dipping, the rotation of the hand mold is utilized, and the improvement of the hand mold structure is matched, so that air flow can be generated in the hand mold, and the air flow can be guided to the surface of the hand mold and surrounds the dipping part of the hand mold to form air flow, and moisture generated by drying the surface of the hand mold is guided, so that the moisture on the surface of the hand mold is quickly removed; and the hand mold drying process is accelerated, so that the hand mold is uniformly dried, the problems that the waterproof performance is reduced, the mechanical performance becomes poor and the moisture permeability is changed after the polyurethane glove is formed are solved, and the waterproof and moisture permeability of the polyurethane glove is improved.

The invention discloses a high-barrier composite film for packaging a vacuum insulated panel, which comprises a high-barrier composite film material, and the high-barrier composite film material is composed of a protective layer, a barrier layer, a solvent bonding layer and a heat sealing layer. The preparation method of the high-barrier composite film for packaging the vacuum insulated panel comprises the following steps: S1, compounding the aluminum-plated surfaces of the first polyester aluminum-plated film and the second polyester aluminum-plated film on a film compounding machine by matching with the second adhesive layer. All layers of materials are combined and bonded together through the solvent bonding layers to form the high-barrier composite membrane material, the high-barrier material is firstly compounded and cured in a mode of step-by-step temperature increasing, and then other layers of materials are compounded, so that the formed high-barrier composite membrane material has better oxygen permeability and moisture permeability detection effects than those of an imported material composite membrane material; and the anti-aging effect is extremely close to that of an imported material composite membrane, so that the cost is reduced, the anti-aging effect is ensured, and the oxygen permeation and moisture permeation effects are improved.

The invention discloses a self-softening one-way moisture-conducting environment-friendly fabric and a preparation method thereof, and belongs to the technical field of fabric weaving, the front face of the fabric is made of surface yarn chinlon filaments and polyester yarns, the lining is made of polypropylene spandex core-spun yarns, and the fabric is woven through a single-side knitting machine structure and has the characteristics of self-softening and one-way moisture-conducting. Compared with the prior art, the fabric is soft and comfortable, has good moisture permeability and environmental protection property, and is suitable for the fields of outdoor sports, fitness, daily casual clothes and the like.

The invention belongs to the field of high polymer materials, and discloses a double-trigger programmable degradable PHA composition and a preparation method thereof. A cured film structure formed by the composition sequentially comprises an outer protective layer, a trigger layer and an inner functional layer from outside to inside, wherein the outer protective layer takes polyhydroxyalkanoate as a base material, a reversible cross-linked network is introduced into the outer protective layer, the trigger layer is provided with humidity and ion double-trigger microcapsules, and the inner functional layer is used for bearing functional auxiliaries. The cured film can maintain low permeability and mechanical stability before application. After application, under the synergistic effect of specific moisture and ions, the trigger layer is activated, so that the cured film is subjected to step-type improvement of moisture permeability in a preset time window, and a through hole is formed. And finally, integral disintegration is realized through physical structure failure. The technology can be applied to the fields of seed coating and the like, the activity of a biological base material can be ensured by adopting a low-temperature process with the temperature lower than 50 DEG C, and unification of stable protection before application and on-demand disintegration after application is achieved.

The invention discloses a high-water-pressure moisture-permeable physiologically comfortable fabric and a preparation method thereof, and relates to the technical field of layered products, in particular to a layered product composed of polyesters, the preparation method comprises the following steps: after triangular polyester fibers are made into a fabric, the fabric is sequentially subjected to hot-pressing compounding with a PU film and a pretreated raised line fabric, and the fabric is prepared into the high-water-pressure moisture-permeable physiologically comfortable fabric. By means of the special-shaped structures of the fabric made of the triangular polyester fibers and the raised line fabric, the occlusal force of the fabric and the PU film is improved, heat loss is reduced, the water pressure resistance and moisture permeability of the fabric can be guaranteed, meanwhile, the combination effect of the fabric and the PU film is promoted, and the heat preservation performance of the fabric is enhanced; the defect that in the prior art, a synthetic fiber fabric and a PU film in a water-pressure-resistant moisture-permeable fabric are poor in binding property and heat retention property is overcome. The convex strip part can be more tightly attached to the film, and the groove part can play a role in buffering and accommodating, so that the compounded fabric is more tightly attached and is not easy to separate.

The invention relates to the related technical field of composite fiber fabrics, in particular to a composite phase-change fiber fabric which comprises five layers of structures stacked in sequence, a surface layer is warp and weft twisted surface cloth formed by compounding plant source cellulose aerogel, organic phase-change microcapsules, a superfine denier polyester matrix and a carbon-based conductive material, and a surface layer is warp and weft twisted surface cloth formed by compounding plant source cellulose aerogel, organic phase-change microcapsules, a superfine denier polyester matrix and a carbon-based conductive material; through chemical bonding, gradient distribution and bionic structure design, the technical bottlenecks that the heat storage performance of a traditional phase change material is easy to attenuate, moisture permeability and heat preservation are difficult to consider, and a functional layer is easy to peel are systematically solved; the multi-level synergistic effect provides an innovative solution with high stability, wearing comfort and environmental adaptability for the intelligent thermoregulation clothes, and the fabric is obviously superior to the existing single-function or simple composite fabric.

The invention discloses a waterproof and moisture-permeable composite film and a preparation method thereof, a waterproof and moisture-permeable fabric and clothes. The waterproof moisture-permeable composite film comprises a microporous film, a ceramic layer and a waterproof layer, wherein the ceramic layer is arranged on the surface of one side or two sides of the microporous film in a laminated manner; the waterproof layer is arranged on the surface of the ceramic layer in a laminated manner; the ceramic layer comprises ceramic particles, the waterproof layer comprises a cross-linked substance of a waterproof finishing agent, or the waterproof moisture-permeable composite film comprises a microporous film and a composite layer laminated on the surface of one side or two sides of the microporous film, and the composite layer comprises ceramic particles and a cross-linked substance of a waterproof finishing agent. The waterproof and moisture-permeable composite film can be used for preparing a waterproof and moisture-permeable fabric. The waterproof and moisture-permeable composite film disclosed by the invention has excellent waterproof performance and washing resistance while keeping good air and moisture permeability.

The invention relates to a flash evaporation material with high transparent strength and a preparation method thereof, the flash evaporation material comprises the following raw materials: polyethylene with high transparent strength of 0.2-3 kN / m; the high-permeability strength is equal to the moisture permeability index * the longitudinal tensile strength; the test standard of the tensile strength is a constant-speed tensile method for testing the tensile strength of paper and paperboards according to GBT 12914-2018; the test standard of the moisture permeability index is GB / T 11048-2018 determination of thermal resistance and moisture resistance (evaporation hot plate method) under the physiological comfort steady state condition of the textile. The flash evaporation material disclosed by the invention has relatively good high-transmittance strength.

The invention discloses an ethylene-propylene-diene monomer rubber working at a high temperature of 180 DEG C. The ethylene-propylene-diene monomer rubber has the characteristics of excellent insulativity, high and low temperature resistance, acid and alkali resistance, weather resistance, high elasticity and flexibility, has more excellent thermal stability and ultraviolet resistance, and has lower wet permeability than natural rubber, butyronitrile rubber and silica gel; the invention also provides a preparation process aiming at the formula, the process is adopted for control, and a two-stage method is adopted for rubber mixing, so that the advantages of each component in the formula are further exerted, and the temperature resistance, the sealing property and the strength of the ethylene propylene diene monomer are improved; the ethylene propylene diene monomer provided by the invention can be widely applied to static sealing products and can be used within the range of 180 DEG C or below, the technical problem that fluororubber with higher cost has to be adopted when the temperature exceeds 165 DEG C is solved, and the ethylene propylene diene monomer has a wide application prospect. The invention belongs to the technical field of rubber processing.

The utility model provides refrigeration equipment. The refrigeration equipment comprises a shell; a drawer; a moisture permeable structure; a refrigeration air supply outlet is formed in the refrigeration chamber, an air return inlet is formed in the fresh-keeping chamber, a first distance is formed between the moisture permeable structure and the inner wall of the fresh-keeping chamber, and the refrigeration air supply outlet is communicated with the air return inlet through the first distance. According to the refrigeration equipment provided by the utility model, the first interval is formed between the moisture-permeable structure and the fresh-keeping chamber, so that air flow entering the refrigeration chamber can only flow to the air return port through the first interval, and the air flow is utilized to take away water accumulated on the moisture-permeable structure and damage humidity accumulation on the surface of the moisture-permeable structure; a dynamic and stable internal and external humidity difference environment is established, the moisture permeable effect of the moisture permeable structure is kept, then the fresh-keeping effect of the refrigeration equipment is guaranteed, and the use experience of a user is improved.

The invention relates to the technical field of flame-retardant fireproof materials, in particular to a hydrophobic and moisture-permeable flame-retardant fireproof material as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, mixing phenol and formaldehyde, adding a catalyst, carrying out a reaction at 80-85 DEG C for 3-4 h, adjusting the pH value to strong acidity, then adding a modifier, carrying out mixing, carrying out a reaction at 80-100 DEG C for 2-6 h, adjusting the pH value to 5-6, and carrying out washing and drying so as to obtain modified phenolic resin; and S2, drying the modified phenolic resin, and carrying out melt blowing, curing, washing and drying to obtain the flame-retardant fireproof material. The prepared non-woven material has excellent flame-retardant and fireproof performance, the hydrophobic and moisture-permeable performance is further improved, the non-woven material is comfortable and durable, the applicability in an extreme environment is excellent, and the application requirement of firefighter uniform or heat insulation clothes can be met.

The invention discloses a high-comfort-degree pillowcase blended fabric, and particularly relates to the field of articles for daily use, the high-comfort-degree pillowcase blended fabric comprises an outer fabric layer, a middle spacing layer and an inner fabric layer, and the outer fabric layer and the inner fabric layer are connected through the middle spacing layer; and the outer fabric layer, the middle spacing layer and the inner fabric layer jointly form a three-dimensional spacer fabric with a multi-layer structure. According to the invention, through the multi-layer structure design, a three-dimensional pore structure is formed, air flow and heat dissipation are promoted, the moisture-permeable and air-permeable performance is excellent, and comfort and hygiene in the use process are ensured; the outer layer, making contact with the skin, of the cloth is made of cool fibers, the middle spacing layer achieves dynamic supporting and long-term shape stability through the composite design of a rigid framework and elastic driving, and the use comfort is remarkably improved; by means of the moisture and air permeability design of the pillowcase, the use experience is further improved, stuffiness and discomfort are avoided, and the air permeability, the moisture permeability, the cool feeling and the supporting performance are comprehensively improved in combination with the synergistic effect of specific fiber materials.

The invention provides a degradable breathable composite film based on a gradient microporous structure and a preparation method and application thereof, and belongs to the field of protective materials.The preparation method comprises the steps that PLA, PBAT, ADR, CaCO3 and modified master batches are subjected to melt blending in proportion, a three-layer casting film is prepared through three-layer casting film forming equipment, the three-layer casting film is formed through a stretching technology, and a gradient breathable film is obtained; a PLA non-woven fabric is prepared through a melt-blowing or spun-bonding technology; and compounding the gradient breathable film with a PLA non-woven fabric to obtain the degradable breathable composite film based on the gradient microporous structure. The three-layer casting co-extrusion process is adopted, the gradient porosity breathable film and the hydrophilic / hydrophobic design are combined, the comprehensive performance of the protective material is effectively improved, the moisture permeation amount of the material is increased, the hydrostatic pressure of the material is improved, and therefore the barrier property and comfort of the material are enhanced. The blocking layer is made of a porous membrane material formed by stretching PLA and PBAT composite CaCO3, the comfortable layer is made of a PLA spunbond / melt-blown non-woven fabric material, and full degradation of the protective material is achieved.

The application discloses a kind of high waterproof moisture-permeable polyurethane film materials and high waterproof moisture-permeable fabric, it is related to polyurethane film material technical field, high waterproof moisture-permeable polyurethane film material, including following raw materials: polyether diol, diisocyanate, organic solvent, modified porous biochar, modified diatomite, chain extender, thickening agent, defoaming agent, ultraviolet absorber, dibutyltin dilaurate;The modified porous biochar is prepared by activating corn straw powder by potassium phosphate and potassium hydroxide in cooperation, and polyethylene glycol is added as a dispersant, and the modified porous biochar is treated by mercapto and fluorination modification;By introducing potassium phosphate in cooperation with potassium hydroxide to form an activation system in the preparation of modified porous biochar in polyurethane film material, combined with polyethylene glycol, dispersion optimization and reduction synergy are realized, and the moisture permeability, waterproofness, mechanical properties and durability of the material are improved.

The invention relates to the technical field of polymer functional material processing, and particularly discloses a polyethylene waterproof breathable film using PTFE micro powder as an opening agent and a preparation method of the polyethylene waterproof breathable film. The waterproof breathable film is prepared from the following components in parts by weight: 50-70 parts of linear low-density polyethylene, 10-40 parts of PTFE (Polytetrafluoroethylene) micro powder, 3-8 parts of a modified compatilizer and an auxiliary agent. The preparation method comprises the following steps: S1, activating PTFE micro-powder by a silane coupling agent and coating the PTFE micro-powder with polyethylene wax to obtain modified micro-powder; s2, uniformly mixing all the components; s3, carrying out melt extrusion at 180-210 DEG C through a double-screw extruder, and carrying out tape casting to form a cast sheet; s4, the casting piece is heated to 90-115 DEG C for two-way stretching, and micropores are formed through interface stripping between the PTFE particles and the base body; and S5, carrying out heat setting at 120-130 DEG C, cooling, and rolling to form the film. Through the synergistic effect of the self-made compatilizer and the pretreatment process, the interface anchoring force is enhanced, the problems of powder falling and water leakage of highly-filled PTFE are solved, and meanwhile, high moisture permeability, high hydrostatic pressure resistance and high mechanical property are taken into account.

The invention relates to the technical field of spunlace non-woven materials, and particularly discloses a medical high-performance polylactic acid spunlace composite non-woven material and a preparation method thereof.The preparation method comprises the steps that firstly, polylactic acid fibers and crude natural cellulose fibers are modified, and a compatilizer PLGA-PEG-MDI segmented copolymer is prepared; the preparation process of the spunlace composite non-woven material comprises the steps that viscose is subjected to plasma activation, a compatilizer is sprayed to be loosened and mixed with modified polylactic acid fibers, cross lapping is carried out, polylactic acid added with the compatilizer is melt-blown to the surface of the lapping, and the spunlace composite non-woven material is obtained. And finally, paving the modified crude natural cellulose on the surface of the melt-blown layer to form the spunlace composite non-woven material with good antibacterial property, one-way wet permeability and degradability.

The invention provides a polymer total heat exchange membrane with a Tailing structure and a preparation method and application thereof.The polymer total heat exchange membrane comprises a net-shaped porous supporting layer and a functional layer, and the functional layer is arranged on the single-side surface of the net-shaped porous supporting layer and fills at least part of pores of the net-shaped porous supporting layer; the functional layer is provided with an uneven Turing structure; the net-shaped porous supporting layer and the functional layer with the uneven Tailing structure are matched, so that the obtained polymer total heat exchange membrane has excellent moisture permeability and is suitable for being applied to a fresh air exchange system.

The present invention belongs to the field of preparation of nanofiber composite fabrics. The present invention provides a nanofiber high moisture permeability waterproof fabric with multi-level interconnected channels and a preparation method thereof. The fabric body includes an outer layer, an intermediate layer and an inner layer. The outer layer is a pure polyester waterproof fabric that has been waterproofed, the intermediate layer is a nanofiber membrane with multi-level interconnected channels, and the inner layer is a pure polyester fabric; the inner side of the outer layer of pure polyester waterproof fabric is bonded to the hydrophobic polyvinyl alcohol nanofiber membrane of the intermediate layer of nanofiber membrane with multi-level interconnected channels through hot melt adhesive compounding, and the inner layer of pure polyester fabric is bonded to the hydrophilic polyurethane nanofiber membrane of the intermediate layer of nanofiber membrane with multi-level interconnected channels through hot melt adhesive compounding. The nanofiber membrane with multi-level interconnected pores in the middle layer is composed of multiple nanofiber membrane layers stacked in sequence. Each nanofiber membrane layer has two layers of nanofiber membranes with different fiber diameters, one layer is a hydrophilic polyurethane nanofiber membrane, and the other layer is a hydrophobic polyvinyl alcohol nanofiber membrane. The nanofibers of the two membranes between and within the multi-level nanofiber membrane layers are cross-connected to form a three-dimensional structure with multi-level interconnected pores. The pore size gradually decreases from the hydrophilic polyurethane nanofiber membrane to the hydrophobic polyvinyl alcohol nanofiber membrane. The moisture permeability is higher than 15000g / (m 2 24h), the hydrostatic pressure is higher than 60kPa.

This invention relates to the field of polyurethane glove manufacturing technology, specifically an innovative manufacturing method for waterproof and breathable polyurethane gloves with significantly improved waterproof, breathable, and mechanical properties. The method includes lining finishing, impregnation with a coagulant followed by drying, impregnation with polyurethane foam slurry followed by drying, impregnation with polyurethane slurry followed by drying, and impregnation with particle slurry followed by drying. During the drying process after impregnation, the hand mold's rotation, combined with improvements to its structure, generates airflow within the mold. This airflow is guided to the mold surface, circling around the impregnated area and creating airflow. This airflow effectively removes moisture generated during the drying process, accelerating the drying process and ensuring uniform drying. This avoids the problems of reduced waterproof performance, deteriorated mechanical properties, and altered breathability that often occur after polyurethane glove molding, thus improving the waterproof and breathable properties of the polyurethane gloves.

The invention belongs to the technical field of textiles, and particularly relates to a composite fabric, a preparation method thereof and a textile. The composite fabric is formed by sequentially compounding a first fabric layer, a film layer, a comfortable layer and a second fabric layer through adhesive hot melting in the thickness direction, the first fabric layer and the film layer are compounded through adhesive point-like hot melting, the film layer and the comfortable layer are compounded through adhesive point-like hot melting, and the film layer is made of a polytetrafluoroethylene film or a film formed by modified polytetrafluoroethylene. According to the application, a waterproof, moisture-permeable and air-permeable polytetrafluoroethylene film or a film formed by modified polytetrafluoroethylene is selected as a film layer material, and the first fabric layer and the film layer as well as the film layer and the comfortable layer are compounded through adhesive point-like hot melting; the technical problems of poor air permeability and poor moisture permeability caused by the fact that the adhesive covers the contact surface between the film layer and the adjacent layer in the compounding process are solved, so that the composite fabric has air permeability, waterproofness and moisture permeability, and the comfort of the composite fabric is improved.

The invention discloses a highly waterproof and moisture permeable polyurethane film material and a highly waterproof and moisture permeable fabric, and relates to the technical field of polyurethane film materials. Comprising the following raw materials: polyether glycol, diisocyanate, an organic solvent, modified porous charcoal, modified diatomite, a chain extender, a thickening agent, a defoaming agent, an ultraviolet absorbent and dibutyltin dilaurate. The modified porous biochar is prepared by synergistically activating corn straw powder through potassium phosphate and potassium hydroxide, polyethylene glycol is added as a dispersing agent, and the modified porous biochar is subjected to sulfhydrylation and fluorination modification treatment; potassium phosphate is introduced in preparation of modified porous biochar of a polyurethane film material to cooperate with potassium hydroxide to form an activation system, and polyethylene glycol is combined to realize dispersion optimization and reduction cooperation, so that moisture permeability, water resistance, mechanical properties and durability of the material are improved.

A moisture-permeable waterproof laminated fabric (9) includes an outer fabric layer (2), and a nanofiber nonwoven fabric layer (3) laminated on one face of the outer fabric layer (2). At least one face of the nanofiber nonwoven fabric layer (3) is a water-repellent layer (5). The outer fabric layer (2) and the nanofiber nonwoven fabric layer (3) are partially bonded together with an adhesive (4). A method for manufacturing the fabric includes applying a water repellent agent to at least one face of the nanofiber nonwoven fabric layer (3) and curing the water repellent agent to form a water repellent layer (5), and partially bonding the nanofiber nonwoven fabric layer (3) and the outer fabric layer (2) together with an adhesive (4). As a result, the moisture-permeable waterproof laminated fabric that can continue to display the air permeability and the moisture permeability of its moisture permeable film irrespective of exposure to rain and perspiration during wearing, the method for manufacturing the fabric, and a garment including the fabric are provided.

The invention relates to the technical field of fabric fabrics, in particular to preparation of a stain-resistant and waterproof polyester composite fabric. The invention discloses a stain-resistant waterproof polyester composite fabric and a preparation method thereof, the composite fabric is composed of three layers from outside to inside, the first layer is a polyester filament yarn surface layer subjected to fluorinated graphene and plant source C18 alkylsilane amphiphobic finishing; the second layer is a copolyamide hot melt adhesive net film with a melting point of 105 DEG C; and the third layer is a degradable multifunctional thermoplastic polyurethane elastomer film loaded with silver zeolite antibacterial microcapsules and conductive carbon nanotubes. An amphiphobic finishing liquid is uniformly deposited on the surface of polyester by adopting a supercritical CO2 one-step method, and nanoparticles and fibers are covalently bonded through a chitosan-citric acid cross-linked network, so that the waterproof grade is still greater than or equal to 90 after 30 times of water washing, the oil repellent grade is greater than or equal to 5, and the water contact angle and the oil contact angle are reduced by lt; the temperature is 5.5 DEG C, and the moisture permeability retention rate is gt; the antibacterial rate is 97%, and the antibacterial rate is gt; the compost degradation rate within 180 days is gt; 90%.

The invention discloses a surface texture recognition system based on a fabric tactile sensor and a construction method of the surface texture recognition system, and relates to the field of recognition precision regulation and control. The prepared interdigital electrode and the sensing electrode are laminated and assembled into the fabric tactile sensor with the bionic microstructure; the constructed microstructure sensing electrode can realize efficient sensing of static force and mechanical vibration at the same time through microstructure multi-dimensional deformation so as to realize efficient identification of surface fine texture textures; the constructed sensing electrode microstructure is adjustable and controllable, so that the performance is adjustable and controllable, the problems of device flexibility, air and moisture permeability, wearing comfort, recognition accuracy reduction and the like caused by a commonly used template microstructure preparation method are solved, and the problems of difficult signal collection and signal crosstalk caused by a multi-mechanism mixed mode are solved.

The invention discloses a roof component based on evaporation and radiation collaborative cooling and preparation and construction thereof. The roof component breaks through the limitation of a single cooling mode through a multi-layer structure coupling evaporative cooling and radiation cooling technology. The reflective film specifically comprises a base layer, an evaporation radiation synergistic cooling material layer and a reflective protection layer. The synergistic material layer is formed by modifying polyacrylamide hydrogel through lithium bromide moisture absorption salt, titanium dioxide nanoparticles are embedded to improve the short-wave reflectivity and long-wave emissivity, and the synergistic material layer has the functions of radiation cooling and moisture absorption evaporation; the reflective protective layer is made of polyvinylidene fluoride-hexafluoropropylene copolymer, so that radiation cooling power is supplemented and pollution is prevented on the premise of moisture permeability; the heat entering a room is reduced by combining an evaporation radiation synergistic cooling material and a reflection protection material; by means of the roof component based on evaporation and radiation collaborative cooling, the limitation of cooling power can be broken through, the cooling effect is enhanced, and the purpose of building energy saving is achieved.

The invention relates to the technical field of composite fabrics, in particular to a heat-preservation and warm-keeping composite fabric inspired by the polar bear skin structure and a preparation method, the heat-preservation and warm-keeping composite fabric is composed of a surface layer, a middle layer and an inner layer, and the surface layer is a polyester yarn raw white fabric which is of a hollow structure and is added with far-infrared heating functional particles; the middle layer is a high-moisture-permeability polyurethane black film added with far infrared functional particles; the inner layer is a yellow knitted polar fleece which is of a hollow structure and is processed by polyester yarns added with far infrared heating functional particles; the surface layer, the middle layer and the inner layer are adhered together through a lamination compounding process. The far-infrared thermal-insulation board is simple in production and processing mode, excellent in far-infrared performance and moisture permeability, high in thermal insulation rate, high in practicability and capable of effectively resisting severe cold of ice and snow weather in winter.