71results about How to "Reduce air permeability" patented technology

The invention relates to the technical field of packaging bags, and discloses a moisture-proof medical packaging bag material and a preparation method thereof. The moisture-proof medical packaging bag material comprises a paper layer and a plastic layer, the paper layer comprises modified kraft paper, and the plastic layer comprises the following raw materials in parts by weight: 70-100 parts of polybutylene terephthalate adipate, 30-50 parts of polypropylene carbonate, 5-7 parts of modified mica and 1.5-3 parts of cellulose acetate oleate. The moisture-proof medical packaging bag material prepared by the invention has good water resistance and mechanical properties, also has good degradability, and has a good application prospect.

The invention belongs to the technical field of flame-retardant materials, and particularly relates to a P-N flame retardant as well as a preparation method and application thereof. The preparation method of the P-N flame retardant comprises the following steps: (1) taking amino trimethylene phosphonic acid and adding a solvent for dilution; (2) adding 1, 3, 5-tri (2-ethoxyl) 1, 3, 5-triazine-2, 4, 6-triketone into the solution obtained in the step (1), and carrying out a constant-temperature oil bath reaction for 2-5 hours to obtain a P-N flame retardant precursor solution; (3) preparing an aqueous solution of an amino compound; and (4) dropwise adding the P-N flame retardant precursor solution into an aqueous solution of an amino compound, carrying out constant-temperature oil bath reaction for 5-10 minutes to generate white precipitates, continuing to react for 0.5-1 hour after the precipitates are generated, washing, carrying out suction filtration on the precipitates, and drying to obtain the P-N flame retardant. The P-N flame retardant disclosed by the invention is a white solid which is almost insoluble in water at normal temperature, and has a good flame retardant effect on a bio-based material.

The invention discloses a compressed air storage tank, and relates to the technical field of air compression tanks, the compressed air storage tank comprises a sponge round block, the sponge round block is used for absorbing accumulated water in a round tank body until the absorbed accumulated water slowly overflows from the lower part in a saturated state, and an annular through hole is formed in the top of the sponge round block; according to the compressed air storage tank, a sponge round block is arranged at the bottom of a bottom opening round hole to absorb accumulated water, and the accumulated water is slowly discharged in a saturated overflow mode; and a plurality of sponge round blocks are arranged in the annular cylinder to reduce the air permeability of the sponge round blocks, and the situation that compressed air penetrates through the sponge round blocks and slowly overflows to the outer side to cause air leakage when little accumulated water is accumulated in the round tank body is prevented.

The invention provides an elastic composite material and a preparation method thereof and a pants product, the elastic composite material comprises a first non-woven fabric, a second non-woven fabric and an adhesive elastic band arranged between the first non-woven fabric and the second non-woven fabric, the adhesive elastic band is an SEBS copolymer or contains an SEBS copolymer, and the adhesive elastic band is made of a thermoplastic elastomer. Wherein the adhesive elastic band imparts elasticity to the elastic composite material. The hot melt adhesive property and elasticity of the SEBS copolymer are combined, the inner layer non-woven fabric and the outer layer non-woven fabric of the waistline assembly are bonded together through online melting of the SEBS copolymer, stretchability and viscidity are provided at the same time, existing waistline rubber band and glue bonding is replaced, only the waistline non-woven fabric and the SEBS material are used for compounding, and in addition, the waistline elastic partition design is adopted, so that the elasticity of the waistline assembly is greatly improved. And the advantages of cost saving, air permeability, softness, wearing comfort improvement and the like are brought.

The invention relates to the technical field of textiles, in particular to a washable microcapsule PCM constant-temperature cool-feeling fabric and a preparation method thereof.The washable microcapsule PCM constant-temperature cool-feeling fabric is prepared from, by mass, 0-25% of spandex and the balance nylon through weft knitting, printed patterns coated on the surface of the gray fabric and phase-change microcapsules arranged on the surface of the gray fabric; the average distribution density of the phase change microcapsules is 15-50g / m < 2 >, and the average diameter of the phase change microcapsules is 1-10 microns; pCM in the phase change microcapsules is subjected to phase change at a specific temperature to absorb or release heat, so that the fabric is kept in a constant comfortable temperature range, and a cool constant-temperature experience is provided; the average distribution density of 15-50g / m < 2 > ensures that enough amount of microcapsules cover the fabric, an effective heat energy exchange layer can be formed between a human body and the environment, and efficient temperature regulation is realized; the diameter of the microcapsules is controlled to ensure that the microcapsules are uniformly dispersed in the fabric, and the influence on the hand feeling and air permeability of the fabric is reduced.

The utility model provides demolding cloth. The demolding cloth comprises a first polytetrafluoroethylene layer, a first polytetrafluoroethylene spacing layer, glass fiber cloth, a second polytetrafluoroethylene spacing layer and a second polytetrafluoroethylene layer which are sequentially stacked, inorganic fillers are uniformly distributed in the first polytetrafluoroethylene spacing layer and the second polytetrafluoroethylene spacing layer respectively. The demoulding cloth provided by the utility model is imperforate demoulding cloth, is convenient to transfer, can be repeatedly used, does not have mucilage glue, only needs to be fixed by an adhesive tape when being paved, is convenient to demould, and has the air permeability of not more than 0.02 mm / s under the conditions that the pressure is 100Pa and the area is 20cm < 2 >.

The invention provides a brominated butyl rubber piston for a pre-filled syringe and a preparation method of the brominated butyl rubber piston, and relates to the technical field of rubber pistons. The brominated butyl rubber piston comprises a basic elastomer and an inert barrier film covering the surface of the basic elastomer. The basic elastomer comprises brominated butyl rubber, bio-based rubber, polyisobutene, talcum powder, calcined kaolin, carbon black, magnesium powder, titanium dioxide, sulfur, active magnesium oxide, polytetrafluoroethylene wax and a slip agent; the inert barrier membrane is polytetrafluoroethylene modified by modified polydimethylsiloxane. The pharmaceutical composition has good drug compatibility and administration convenience, and ensures the safety of medication.

The utility model relates to the technical field of pest trapping, in particular to farmland pest trapping equipment. In order to solve the problems that in the trapping process of existing trapping equipment, an internal filtering structure is prone to being blocked, the trapping effect is reduced, and meanwhile pest control can be affected due to the fact that overflowing occurs in a collecting structure of the trapping equipment, the following technical scheme is provided that the device comprises an upper shell and a lower shell, and a solar panel is installed on the top wall body of the upper shell; a power grid facilitating pest killing is arranged in the upper shell, the surface of the outer ring of the power grid is sleeved with a first sleeve plate, a rotating assembly is arranged at the top of the first sleeve plate, and a cleaning assembly facilitating cleaning of the power grid is arranged on the upper shell. According to the automatic pest cleaning device, the ventilation effect is improved while pests are automatically cleaned, the purpose of monitoring the weight of pest corpses is achieved, workers can be reminded to clean the pests in time, and follow-up pest treatment is prevented from being affected.

The invention relates to a wheat straw rapid biodegradation device which comprises a compaction box with two open ends, a support and a smashing box with a feeding hopper and a discharging hopper, the compaction box and the smashing box are connected through the support, the discharging hopper is arranged at the lower end of the smashing box, a driving part is arranged on the outer side wall of the smashing box, and the driving part is arranged on the lower end of the smashing box. A crushing shaft extending into the crushing box is arranged at the output end of the driving part, and a plurality of crushing cutters are arranged on the crushing shaft; a receiving hopper corresponding to the discharging hopper is arranged at the upper end of the compaction box, and a push plate is horizontally and slidably connected to the interior of the compaction box; after straw is smashed through the smashing cutter, the straw is pushed to the discharging end of the compaction box through the push plate, the straw is gradually extruded and compacted in the moving process, the compacted straw is discharged from the discharging end, the air permeability of the straw is reduced, the oxygen content is reduced, water loss in the straw in the degradation process is reduced, and the degradation efficiency is improved. Favorable conditions are provided for growth and activity of anaerobic microorganisms, and the degradation speed of the microorganisms on the wheat straw is increased.

The invention discloses a preparation method and application of a cationic polyurethane / carboxyl carbon nanotube conductive composite foam, comprising the following steps: (1) preparing a cationic polyurethane; (2) mixing a cationic polyurethane and an inorganic salt by an organic solvent, drying to obtain a cationic polyurethane / inorganic salt composite elastomer, removing the inorganic salt by soaking in hot water to obtain a cationic polyurethane foam, and soaking the cationic polyurethane foam in an aqueous solution of carboxyl carbon nanotubes for a period of time, washing and drying to obtain a conductive composite foam. The cationic polyurethane of the invention comprises a hard segment structure having a cationic group and a soft segment structure with a strong polarity. By introducing a cationic group into the main chain structure of the hard segment, an electrostatic interaction is formed between the carboxyl carbon nanotubes, thereby promoting the binding ability between the nanofiller and the polyurethane foam. The porous structure of the foam improves the sensitivity of the assembled sensor within a small strain range, and is expected to be applied to the field of human motion detection.

The utility model discloses a breathable T-shirt capable of removing peculiar smell, which belongs to the technical field of clothes and comprises a shirt body and sleeves, breathable nets are arranged on the inner sides of the shirt body and the sleeves, the positions of the breathable nets correspond to the armpits of a human body, one end of each breathable net extends to a cuff along the corresponding sleeve, and the other end of each breathable net extends to a lower hem along the shirt body. Flow channels are formed between the breathable net and the clothes body and between the breathable net and the sleeves. According to the breathable T-shirt capable of removing the peculiar smell, breathability and heat dissipation of the armpits are improved, and the influence of sweat on breathability is reduced.

The invention discloses a method for reducing the content of arsenic and tin in a nickel-based alloy material. The method specifically comprises the following steps: adopting pre-melted slag comprising the following components in an electroslag remelting procedure in the preparation process of the nickel-based alloy material: 38%-45% of CaF2, 20%-25% of CaO, 20%-30% of Al2O3, 3%-5% of ZrO2, 3%-5% of BaF2, 1%-3% of MgO, 1%-3% of SiO2 and the balance of inevitable impurities; the ratio of CaO to Al2O3 in the pre-melted slag is 0.8-1; and calcium carbide powder accounting for 1-1.5% of the total amount of the pre-melted slag is also prepared in the pre-melted slag. By the adoption of the method, the removal rate of arsenic and tin in the nickel-based alloy material can reach 46% or above, the problem that arsenic and tin in the nickel-based alloy material are difficult to remove is well solved, the influence of accumulation of As and Sn on the product quality in the recycling process is avoided, and conditions are created for recycling of the nickel-based alloy return scrap.

The present invention relates to the field of crop genetic breeding, and in particular to a method for inducing guava hairy roots without tissue culture. The present invention uses pretreated guava seedlings as explants, uses Agrobacterium rhizogenes carrying a reporter gene and a target gene to infect the explants, and then transfers the infected explants to a culture matrix for cultivation, thereby successfully establishing a simple, low-cost and efficient genetic transformation system for obtaining transgenic materials. Compared with traditional guava genetic transformation methods, the induction method provided by the present invention does not require tissue culture, improves transformation efficiency, shortens the transformation cycle, and also reduces consumables and manpower consumption, thereby solving the problems of complex experimental operation, large-scale equipment and consumables, long cycle and low success rate in the original guava genetic transformation technology, and provides a convenient and efficient tool for the study of guava gene functions (especially root-specific expression of gene functions).

The invention discloses a high-temperature-resistant foamed silica gel material and a preparation method thereof, and belongs to the technical field of silicone rubber, and the preparation method comprises the following steps: 1, adding 95-97 parts by weight of methyl vinyl silicone rubber and 3-5 parts by weight of vinyl polyborosilane into an internal mixer for plastication, then adding 4 parts by weight of hydroxyl silicone oil and 40 parts by weight of white carbon black for mixing, and carrying out extrusion molding to obtain a foamed silica gel material; cooling to obtain a rubber compound, then adding 2-3 parts of an inorganic nano filler and 2 parts of a vulcanizing agent into the rubber compound, and performing room-temperature thin-passing to obtain a composite material; 2, pre-vulcanizing the composite material; then carrying out supercritical CO2 foaming; and finally, carrying out post-vulcanization. The flame retardant property of the foamed silica gel material is improved by regulating and controlling the dosage of the inorganic nanofiller and the vinyl polyborosilane. Wherein the vinyl polyborosilane is introduced, so that the damping temperature range can be widened, the thermodynamic property can be regulated and controlled in a relatively large range, and the vinyl polyborosilane can participate in subsequent crosslinking and has better stability.

The present application relates to volatile gas treatment technical field, disclose a kind of organic liquid volatilization inhibitor and the method for inhibiting organic liquid volatilization.The organic liquid volatilization inhibitor contains hollow microsphere, surfactant, stabilizer, dispersant, coupling agent and solvent, for inhibiting organic liquid volatilization;Wherein, the density of the organic liquid volatilization inhibitor < the density of the organic liquid.The density of the organic liquid volatilization inhibitor provided by the present application is less than volatile liquid, with certain fluidity and stability, can realize the automatic covering and complete sealing to volatile organic liquid surface, effectively prevent organic liquid volatilization during storage, loading and transportation.

The invention provides a jujube fruit cracking prevention film agent as well as a preparation method and a use method thereof.The jujube fruit cracking prevention film agent is prepared from the following raw materials in parts by mass: 1-5 parts of a polyvinyl alcohol solution, 1-5 parts of a polyacrylamide solution and 0.5-1 part of a modified oxidized humic acid solution; wherein the polyvinyl alcohol solution is prepared from the following components in parts by mass: 1 to 5 parts of polyvinyl alcohol, 0.1 to 0.5 part of cross-linking agent and 50 to 120 parts of water; the polyacrylamide solution is prepared from the following components in parts by mass: 1 to 5 parts of polyacrylamide, 0.1 to 1 part of hydrophobic monomer and 80 to 150 parts of water; the modified oxidized humic acid solution is prepared from the following components in parts by mass: 1 to 2 parts of modified oxidized humic acid, 0.05 to 0.1 part of calcium salt, 0.05 to 0.1 part of phosphorus salt, 0.05 to 0.1 part of silicon fertilizer, 0.05 to 0.1 part of borax, 0.05 to 0.1 part of growth promoting agent and 30 to 80 parts of water. The jujube fruit cracking prevention film agent can prevent jujube fruit cracking.

The utility model discloses a kind of barrier composite materials for food, including PET film layer and transparent PE film layer;The PET film layer with the transparent PE film layer between adhesive film layer composite connection is connected.The barrier composite material for food provided by the utility model is formed by PET film layer and transparent PE film layer composite, its permeability has been effectively reduced relative to single PE material layer, after packaging food, it can improve the shelf life effect of food, and then extend the shelf life of food.

The invention relates to an antistatic and anti-wrinkle treating agent for paper printing and a using method thereof, and relates to the technical field of paper printing. The antistatic and anti-wrinkle treating agent for paper printing is prepared from the following raw materials in parts by mass: 5 to 15 parts of polyvinyl alcohol, 10 to 15 parts of silicone oil, 15 to 25 parts of acrylate emulsion, 5 to 10 parts of nano silicon dioxide, 0.5 to 1 part of antioxidant, 0.5 to 1 part of mildew preventive and 40 to 60 parts of deionized water. The application ensures that the paper has multiple properties, thereby having the effect of improving the applicability of the paper.

The invention relates to the field of production of pre-dissolving type slagging agents, in particular to a production process of a high-stability pre-dissolving type slagging agent. The production process aims to solve the technical problems that in the prior art, a rotary kiln cannot bear corrosion of sulfur, and matched cooling equipment, dust removal equipment, desulfurization equipment and the like are extremely easy to damage. The production technology of the high-stability pre-dissolving type slagging agent comprises the following steps of S1, solid waste drying, S2, brick pressing, S3, high-temperature firing in a tunnel kiln, S4, cooling and S5, crushing into particles. A tunnel kiln is used for firing, a plurality of processing technologies are added compared with a rotary kiln, however, both the yield and the stability of a finished product are greatly improved, the previous rotary kiln is low in yield, high in equipment corrosion, easy to form a kiln in the production process, high in product density, poor in air permeability and relatively high in environment-friendly emission, and the existing tunnel kiln is high in yield and low in cost. And the product is low in density, good in air permeability, environment-friendly and light in emission pressure, and does not form kiln caking in the production process.

The utility model discloses a hepa filter component, which comprises an outer frame, the outer frame is provided with a mounting cavity for mounting a filter layer, the outer surface of the filter layer and / or the outer surface of the outer frame are / is detachably provided with a rough filter layer, and the hole gap of the rough filter layer is larger than the hole gap of the filter layer. The hepa filtering assembly is reasonable in structure, the rough filtering layer is detachably arranged, when the air permeability effect of the hepa filtering assembly is reduced, the rough filtering layer can be torn down, blocked large-particle dust and small leaves are synchronously removed, the cleaning frequency of the hepa filtering assembly is reduced, and convenience is improved.

The utility model discloses an antibacterial breathable film suitable for a leakproof layer of a paper diaper, which comprises a breathable film main body, two side surfaces of the breathable film main body are respectively provided with a first TPU reinforcing layer and a second TPU reinforcing layer, a gap of the first TPU reinforcing layer is coated with an antibacterial coating to increase the antibacterial effect of the paper diaper, and the second TPU reinforcing layer is coated with an antibacterial coating to increase the antibacterial effect of the paper diaper. Gaps of the second TPU reinforcing layer are coated with the anti-blue-light protective layer to achieve the anti-blue-light effect, the anti-pressure capacity of the breathable film body is enhanced through the first TPU reinforcing layer and the second TPU reinforcing layer, the breathable film body is compounded in a leakage-proof layer structure of the paper diaper, and under the condition that the influence on the breathability of the breathable film body is reduced, the anti-blue-light effect is achieved. The elasticity of the leakage-proof layer of the paper diaper is effectively improved, after the leakage-proof layer is deformed to a large extent, the TPU reinforcing layer can drive the leakage-proof layer to shrink and recover, and the use effect of the breathable film is prevented from being affected.

The application belongs to the technical field of papermaking, and particularly relates to a method for preparing environment-friendly decorative base paper with high water absorption and low air permeability by using bamboo pulp fibers, which comprises the following steps: S1, preparing wet pulp; S2, mixing pulp; S3, preparing base paper; S4, preparing coating; and S5, paper surface coating treatment. The decorative base paper prepared by the method for preparing environment-friendly decorative base paper with high water absorption and low air permeability by using bamboo pulp fibers has the advantages of low filler content, high physical strength, good water absorption and low air permeability.

The invention discloses an efficient performance detection device and method for paper diapers, and aims to solve the problems of various detection instruments, low test efficiency and the like in the prior art. The device comprises a device rack, a lifting component, a lifting mechanism and a detection disc, the device drives the detection disc to descend through the lifting mechanism, and when the detection disc descends, under the action of a transmission assembly, the detection disc is driven to rotate. The lifting component works, so that the pressing frame presses down and fixes the paper diaper on the detection table, when the detection disc continues to descend to press down the pressing frame, an air chamber can be formed, the air supply system inflates the air chamber, the air pressure sensor detects the air pressure change to judge the air permeability of the paper diaper, and then detection water can be sprayed to the paper diaper through the water supply system. And finally, the protruding pressing table can downwards press the paper diaper which absorbs water, so that the back permeability is detected.

The present invention discloses a prefabricated variable diameter hole pipe pile structure for soft foundation treatment and a construction method thereof, which relates to the field of prefabricated pipe piles. The existing pile body small holes with equal apertures cannot quickly discharge the increased pore water in the soil around the deeper pile body into the pipe cavity, and the soil around the pile is easy to block the pile body small holes while discharging the pore water during the pile sinking process, and cause the soil around the pile to be lost. The present invention can discharge the super pore water more quickly and prevent pile sinking accidents by setting a plurality of pile body small holes, i.e., variable diameter holes, whose apertures gradually increase from the pile top to the pile bottom along the axial direction of the pipe pile, on the pipe pile wall; by wrapping a geotextile on the outer side of the pipe pile wall, utilizing the anti-filtration and drainage effects of the geotextile, the super pore water and gas in the soil around the pile are discharged into the pipe cavity through the pores of the geotextile, and at the same time, soil particles are intercepted to prevent the soil from blocking the pile body small holes, and can maintain the stability of the water and soil engineering within the range of the pile body small holes, and prevent soil and water loss in a local range.

The invention is applicable to the field of water quality detection systems, and provides a cloth dyeing wastewater quality detection system and method. The heating module is used for heating the mixed solution in the sampler from a normal temperature to a preset temperature in a discontinuous heating manner so as to reduce the air permeability of an oil film in the sample; the heating timing module is used for recording the interval time and the heating time of the heating work of the heating module and sending a feedback signal to the control module after the time reaches a preset threshold value; the control module receives the feedback signal and controls the heating module to start and stop working; and the dissolved oxygen concentration detection module is used for detecting the content of dissolved oxygen in the sampler, so that the influence caused by a small amount of vegetable fat in a detection solution can be reduced, the precision of detecting the biochemical oxygen demand (BOD5) in the bast fiber textile wastewater is improved, the error rate of an experimental result is reduced, and the accuracy of a numerical value is ensured.

The invention discloses a medical disposable self-adhesive dressing and a manufacturing method thereof, which relates to the technical field of medical self-adhesive dressings, and comprises a self-adhesive dressing base layer, wherein a drug injection module and a drug storage module are installed inside the self-adhesive dressing base layer, wherein the drug injection module comprises a medical silicone injection layer installed inside the self-adhesive dressing base layer, wherein a medical silicone injection protective layer is installed at the bottom of the medical silicone injection layer, wherein a connecting cover is installed at the bottom of the self-adhesive dressing base layer, wherein a movable cover is installed at one side of the connecting cover, and wherein a peeling label is installed at one end of the movable cover. The present invention is provided with a drug injection module, wherein the drug injection module comprises a self-adhesive dressing base layer, a medical silicone injection layer, a medical silicone injection protective layer, a connecting cover, a movable cover, a peeling label and a re-adhesive coating, and wherein the built-in medical silicone injection layer allows drugs to be directly and accurately injected into the medical disposable self-adhesive dressing, thereby solving the problems of inconvenient drug administration and high infection risk during wound care for patients.

The invention discloses a surgical protective film with a guiding effect and a preparation process, and belongs to the technical field of medical instruments. The operation protective film with the guiding function sequentially comprises a first water retaining dam, an antibacterial film, a collecting bag, a valve and a discharging hose from top to bottom, and a second water retaining dam and a third water retaining dam are vertically arranged on the periphery of the antibacterial film side by side; the water retaining dam is obtained by soaking water retaining foam in a PE-PU solution, punching the water retaining foam through a laser-beam drilling machine and conducting hydrophobic treatment. The antibacterial film is obtained by coating and drying a polymer solution and nano particles. According to the surgical protective film, the antibacterial film with the guiding function is prepared through the laser etching technology, positioning in the surgical process is facilitated, and therefore the surgical efficiency and safety are improved; by means of the three-face blocking structure, flushing fluid flows in one direction to enter the collecting bag, the fluid can be effectively prevented from permeating to the outside of an operation area in the operation process, and the risks of pollution and cross infection in the operation process are reduced.

The utility model relates to a sewage-proof circulating breathable shoe, which comprises a shoe main body, the shoe main body comprises a front vamp part, a rear heel part and a sole, the front vamp part and the rear heel part are respectively provided with a breathable mesh surface, an elastic insole is arranged in the shoe main body, a plurality of breathable cavities are arranged in the elastic insole, and the breathable cavities are communicated with the shoe main body. The shoe sole is provided with a containing groove and a rear baffle, the containing groove and the rear baffle correspond to the breathable net face in position and shape, a groove opening of the containing groove is vertically upward, the edge of the groove opening of the containing groove is provided with a protruding extrusion rubber strip, the bottom end of the rear baffle is inserted into the containing groove, and the extrusion rubber strip is tightly attached to the side face of the rear baffle. The baffle and the shoe sole are connected into a whole after the baffle is pulled upwards, sewage splashed when a user steps on a water pit is blocked, the sewage is prevented from permeating into the shoe from the breathable net face, and the shoe is kept breathable and dry.

The utility model relates to the technical field of curtains, and particularly discloses a heat insulation composite textile curtain fabric which comprises pure cotton cloth, a composite textile heat insulation structure is arranged at the upper end of the pure cotton cloth and comprises polyamide fabric, and a plurality of connecting strips are arranged at the upper end of the polyamide fabric. The composite textile heat insulation structure further comprises polyester fibers, linen fabric and a ceramic microbead coating, the polyester fibers are located at the upper ends of the connecting strips, the connecting strips are made of non-woven fabric and located between the polyester fibers and the polyamide fabric, a certain distance is reserved between the polyester fibers and the polyamide fabric, the linen fabric is located at the upper ends of the polyester fibers, and the ceramic microbead coating is located at the lower ends of the linen fabric. According to the curtain fabric, the polyester fibers and the polyamide fabric are arranged, the polyester fibers and the polyamide fabric are connected through the connecting strips, a certain air compartment is reserved between the polyester fibers and the polyamide fabric, and due to the fact that air has a certain heat insulation effect, the curtain fabric can further achieve the heat insulation effect, and practicability is improved.

The invention relates to the field of novel building materials, in particular to air permeability adjustable concrete and a preparation method thereof. The invention provides a concrete raw material with adjustable air permeability. The concrete raw material comprises concrete; an inorganic adhesive; mineral particles; a pore regulator; carbon nanotubes and synthetic fibers. Wherein the concrete, the inorganic adhesive and the mineral particles are used as base materials, and then the air hole regulator, the carbon nanotubes and the synthetic fibers are added at a certain temperature, so that the concrete with adjustable air permeability is prepared. The invention further provides a preparation method of the concrete with the adjustable air permeability. The preparation method comprises the two steps of S1, base material mixing and S2, preparation of the concrete with the adjustable air permeability. The pore regulator is uniformly distributed in the concrete produced by the preparation method, a carbon nanotube fiber thin layer is generated on the surface, and the air permeability can be regulated by combining the pore regulator and the carbon nanotube fiber thin layer.