21results about How to "Reduce air permeability" patented technology

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 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 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 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 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 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 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.

The application provides a coating slurry, a diaphragm, a preparation method of the diaphragm and a battery. The diaphragm comprises a base material and a coating layer arranged on at least one surface of the base material, wherein the coating layer comprises non-fluorine polymer microspheres and a non-fluorine binder; the mass ratio of the non-fluorine polymer microspheres to the non-fluorine binder is (1-18):1; the melting point of the non-fluorine polymer microspheres is denoted as T, the glass transition temperature of the non-fluorine binder is denoted as Tg, and the T and the Tg satisfy the following relationship: 30≤|T+Tg|≤190. In the application, the diaphragm can be cold-pressed with positive and negative electrode sheets at low temperature, the adhesion between the diaphragm and the positive and negative electrode sheets is high, the diaphragm has excellent interface bonding performance, and the diaphragm has good air permeability, thermal stability and anti-liquid wrinkle performance.

The application belongs to the technical field of papermaking, and provides a food contactable double-coated copper-coated card paper, a preparation method and application thereof. The food contactable double-coated copper-coated card paper comprises, from the front side to the back side, a front side surface coating layer, a front side base coating layer, a base paper, a back side base coating layer and a back side surface coating layer which are sequentially stacked, and the base paper comprises, from the front side to the back side, a surface layer, a core layer and a bottom layer which are sequentially stacked, the front side base coating layer and the back side base coating layer are obtained by coating a first coating material, and the front side surface coating layer and the back side surface coating layer are obtained by coating a second coating material, wherein the first coating material comprises the following components: 65-grade ground calcium carbonate, a first latex and a starch-acrylate graft copolymer, and the second coating material comprises the following components: 95-grade ground calcium carbonate, a second latex and a starch-acrylate graft copolymer. The double-coated copper-coated card paper has the advantages of high printing surface strength, high gloss, low surface roughness, low difference between two sides and low heavy metal content.

The invention provides a sintering dehumidification method, which relates to the technical field of sintering, and comprises the following steps: conveying a material to be sintered to a sintering trolley; the sintering trolley is used for conducting sintering operation on the materials, so that the materials gradually form a sinter layer, a combustion layer, a preheating layer, a drying layer and an over-wet layer from top to bottom; carrying out air draft operation on the sintered material, and carrying out step-by-step adjustment on the air draft height based on the height change of the over-wet layer, so that the air draft range covers at least part of the over-wet layer in the height direction; and after the combustion layer, the preheating layer, the drying layer and the over-wet layer disappear, obtaining a sintered ore finished product. Water vapor in the material can be efficiently removed through air draft operation, so that the condensation amount of the water vapor is reduced, the thickness of an over-wet layer is reduced, and the sintering effect is improved. And moreover, by controlling the air draft height step by step, the problem of waste of the air draft amount is obviously reduced under the condition that the dehumidification requirement of the over-wet layer is met.

The invention relates to the technical field of PE films, in particular to an ultrathin PE base film and a preparation method thereof. The ultra-thin PE base film is obtained by sequentially carrying out the steps of shearing and melting, extruding and casting and the like on ultra-high molecular weight PE. The ultrathin PE base film has good hydrophobicity and insulativity, and is ultrathin and uniform in thickness, low in air permeability and uniform in pore structure.

This invention discloses a composite fabric, characterized in that the composite fabric comprises a top layer, a middle layer, and a bottom layer sequentially laminated from top to bottom. The middle layer is a waterproof and breathable membrane. The top layer and the middle layer are bonded together by a first adhesive layer, and the middle layer and the bottom layer are bonded together by a second adhesive layer. Both the first and second adhesive layers are hot melt adhesive dot arrays, and the adhesive dots of the first and second adhesive layers at least partially overlap. Using this technical solution helps to improve the softness of the fabric while ensuring a certain level of breathability.

The present invention relates to the technical field of asphalt hot regeneration equipment, and provides an oil fume removal device and method for factory-mixed hot regeneration tail gas, the oil fume removal device comprising a bag dust collector, a powder spraying device and an oil fume removal box; an exhaust gas outlet is formed in the middle of the oil fume removal box, the exhaust gas outlet is equipped with an adjustable damper, and the input end of the bag dust collector is connected with the exhaust gas outlet; a powder bin for storing mineral powder is formed at the lower part of the oil fume removal box; an exhaust gas inlet is provided at the top of the oil fume removal box, and a plurality of the powder spraying devices are provided around the exhaust gas inlet on the inner top wall of the oil fume removal box. The advantages of the present invention are: it can effectively remove asphalt oil fume in the hot regeneration tail gas before entering the bag dust collector, so that the asphalt oil fume in the hot regeneration tail gas will not enter the bag dust collector, and the bag dust collector will not reduce the air permeability due to being filled with asphalt oil fume, thereby effectively improving the service life of the bag dust collector.

The present application relates to a composite separator and a preparation method therefor and use thereof. The composite separator comprises a base film and a composite coating coated on at least one side of the base film, wherein the composite coating comprises ceramics and polymers which are mutually dispersed. The ceramics and the polymers are mutually dispersed, such that the composite separator has good thermal stability, electrolyte wettability and good mechanical properties; and in addition, the hardness of a battery is improved, such that the safety performance of a lithium ion battery is significantly improved.