1414 results about "Microfiber" patented technology

The invention discloses a preparation method of a controllable silk fibroin extracellular skeleton gel material for injection. The composite filler is prepared from the following raw materials in parts by mass: 5-50 parts of silk fibroin, 0.01-5 parts of cellulose and 0.7-10 parts of hyaluronate. The preparation method comprises the following steps: (1) preparation of silk fibroin microfiber gel: adding cellulose into a silk fibroin aqueous solution to prepare gel, crushing and sieving to obtain the silk fibroin microfiber gel; and (2) preparation of an extracellular skeleton gel material: mixing hyaluronate with the silk fibroin microfiber gel, and carrying out physical crosslinking to form the silk fibroin extracellular skeleton gel material. After the modified silk fibroin hydrogel prepared by the method is injected, in-situ tissue regeneration can be promoted, the molecular weight is controllable, the crosslinking degree is controllable, the structure of the modified silk fibroin hydrogel is similar to that of an extracellular matrix (ECM), the degradation process is matched with the in-situ tissue regeneration process, and the modified silk fibroin hydrogel is well improved in the aspects of mechanical property, degradation performance, biocompatibility and the like and has good application prospects. No chemical cross-linking agent is used, and the injection has injectability, and has a very good application prospect in the field of medical beauty injection.

The invention relates to the technical field of synthetic leather, in particular to a preparation method of flame-retardant superfine fiber synthetic leather based on a water decrement technology. The method comprises the following steps: dipping pretreatment of PET / PVA sea-island fiber non-woven fabric in a polyvinyl alcohol aqueous solution, synthesis of a modified polyurethane emulsion with fluorine-containing chain modified melamine coated ammonium polyphosphate as a flame-retardant component, multiple padding and water decrement treatment of a composite base material, and sizing finishing by adding a softening agent and an antistatic agent. Through application of fluorine chain modified melamine, dissolution of flame-retardant components in the water decrement process is effectively prevented, meanwhile, the quality of a carbonized layer is improved, and the flame-retardant efficiency is improved. The obtained superfine fiber synthetic leather has excellent flame retardance, good washing resistance and mechanical properties, comfort and high moisture permeability, and is suitable for clothing and special fields with high safety and durability requirements.

The invention relates to the technical field of composite fabrics, and discloses a preparation method of an antibacterial flame-retardant composite superfine fiber fabric, nylon 6 and low-density polyethylene are subjected to spinning, stretching and heat setting to obtain a fabric base layer, tris (2-chloroethyl) phosphate, p-dimethylaminobenzaldehyde and the like are used as raw materials, and the antibacterial flame-retardant composite superfine fiber fabric is prepared. Performing quaternization and amination reaction to obtain an antibacterial flame-retardant chain extender, and participating in synthesis of polyurethane to obtain a functional layer; the materials of all the layers are flatly laid according to the structure of the fabric base layer, the adhesive layer, the barrier layer, the adhesive layer and the functional layer, and the antibacterial flame-retardant composite superfine fiber fabric is obtained after hot-pressing compounding. The phosphorus and nitrogen elements and the Schiff base in the structure can block the exchange between the fiber matrix and oxygen and heat in the air, so that the flame-retardant effect is achieved; the quaternary ammonium salt cations interfere with metabolism of bacteria through electrostatic interaction, so that the bacteria die due to a'bacterial solution 'phenomenon, and an antibacterial effect is achieved.

The invention belongs to the technical field of new materials in textile engineering, and provides an antibacterial aromatic microfiber suede fabric and a preparation method thereof. The preparation method comprises the following steps: putting a fabric into a 2-methylimidazole solution for dipping treatment; after the dipping treatment is finished, adding a zinc source solution into a 2-methylimidazole solution for reaction to obtain a fabric with MOF nanorods growing on the surface; depositing the electrostatic spinning nanofibers loaded with the aromatic essential oil on a fabric with MOF nanorods growing on the surface to obtain an antibacterial aromatic spinning base cloth layer; and bonding the antibacterial aromatic textile base cloth layer on the microfiber suede layer to obtain the antibacterial aromatic microfiber suede fabric. The antibacterial fragrant microfiber suede fabric prepared by the method is applied to an automotive interior material, so that the automotive interior material has better antibacterial performance and fragrance release function.

Sheets of material used in medical devices and filters are disclosed. The sheets may include a fibrous mat including a plurality of microfibers. The microfibers may include a polymer matrix and a plurality of additive particles. The additive particles may include carbon material particles, therapeutic micro particles, and any combination thereof. Medical devices and filters that use the sheets are disclosed. Methods of producing the sheets are also disclosed.

The invention relates to the technical field of microfiber material preparation, in particular to a preparation method of an insulating flame-retardant automotive interior microfiber material, which comprises the following steps: spinning sea-island fibers by taking PA6 as an island component and LDPE as a sea component and matching with master batches; performing opening, carding, lapping, pre-needling by a pre-needling machine and needling by a needling machine on the sea-island fibers to prepare non-woven fabric; carrying out heat setting on the non-woven fabric; preparing insulating flame-retardant polyurethane slurry, infiltrating the heat-set non-woven fabric to enable the non-woven fabric to be fully impregnated, and then feeding the non-woven fabric into an aqueous solution of dimethylformamide to be subjected to water bath curing, so as to prepare a semi-finished synthetic leather product; extracting sea components in the sea-island fibers from the synthetic leather semi-finished product by adopting a stripping process; and drying the reduced superfine fiber synthetic leather base cloth, immersing the base cloth into a softening agent aqueous solution, and then carrying out drying and leather rubbing treatment to obtain the insulating flame-retardant superfine fiber leather. The product provided by the invention is used for external protection of an intelligent auxiliary driving steering wheel sensing layer, and the resistance of the microfiber material reaches 1.2 megohm or above.

The utility model discloses a composite fiber which comprises a first component, a second component and a third component, the cross section, perpendicular to the length direction, of the composite fiber comprises a plurality of single-component areas and a plurality of separated double-component areas, and every two adjacent double-component areas are separated by a single-component area. The plurality of single-component areas are separated from one another or are connected with one another in the center of the cross section perpendicular to the length direction; the component of the single-component area is a third component, the component of the double-component area comprises a first component and a second component, the first component and the second component are arranged in parallel, the first component and the second component are respectively in contact with the third component, and the single-component area and the double-component area are detachably in contact connection; the composite fiber not only can be directly used, but also can be split into the superfine fiber and the single-component fiber with specific structures, and the elasticity, the glossiness and the strength such as the tearing strength of the superfine fiber are obviously improved at the same time.

The invention discloses a waterproof, anti-crack and moisture-proof self-healing material for a concrete structure and a preparation method thereof, relates to the technical field of concrete, and aims to solve the problems that the mixing degree is poor and the waterproof and moisture-proof effects are reduced due to the fact that various aggregates for improving the strength are added to an existing concrete structure in order to improve the anti-crack strength. The concrete is prepared from the following raw materials by weight: 30%-50% of cement; 5%-30% of sand; 5%-30% of stones; 5%-20% of a reinforcing material; 5%-10% of polymer modified asphalt; 1%-5% of a water reducing agent; 1%-5% of an additive; 1%-5% of a chemical self-healing agent; 1%-5% of a foaming agent; the additive is one or more of a concrete expansive agent, a rapid hardening agent, a plasticizer, a polyurethane type flexible agent and a concrete retarder, and the reinforcing material is one or more of microfibers, slag, fly ash, silane ash and a cellulose material. The cellulose material is one or more of wood, hemp, polypropylene fiber and polyester fiber.

The microfiber leather coating device and the waterproof breathable high-wear-resistance microfiber leather belong to the technical field of cloth surface treatment, when the microfiber leather coating device is used for coating a microfiber leather fabric base material, the microfiber leather fabric base material can be spread in the transverse direction and coated at the same time, the microfiber leather fabric base material passes through the upper portion of the coating device, and the microfiber leather fabric base material is coated with the waterproof breathable high-wear-resistance microfiber leather. Through cooperation of extrusion of a first piston assembly and a second piston assembly and expansion or retraction of a rolling ring set, coating liquid can be sprayed to a microfiber leather fabric base material at a certain speed during coating, the coating effect is improved, the coating liquid comprises aluminum oxide, the hardness and wear resistance of the coating liquid are improved, silicon carbide is further included, and the hardness and wear resistance of the coating liquid are improved. According to the present invention, with the impregnation liquid, the wear resistance and the scraping resistance of the coating liquid can be improved, and the water sprinkling agent is added in the impregnation liquid during the molding of the microfiber leather fabric base material, such that the prepared microfiber synthetic leather has characteristics of high gas permeation, high water vapor permeation and high water resistance.

The ultrafine leather coater and the waterproof and breathable highly wear-resistant ultrafine leather of the present invention belong to the technical field of fabric surface treatment. When the ultrafine leather coater coats the ultrafine leather fabric substrate, the ultrafine leather fabric substrate can be stretched horizontally while being coated. The ultrafine leather fabric substrate passes above the coater. Through the extrusion of the first piston assembly and the second piston assembly and the expansion or retraction of the rolling ring group, the coating liquid can be sprayed onto the ultrafine leather fabric substrate at a certain speed during coating, improving the coating effect. The coating liquid includes alumina, which improves the hardness and wear resistance of the coating liquid, and also includes silicon carbide, which can enhance the wear resistance and scratch resistance of the coating liquid. During the molding of the ultrafine leather fabric substrate, a water repellent is added to the impregnating liquid, making the produced ultrafine fiber synthetic leather have high air permeability, water vapor permeability, and waterproof performance.

The invention provides a positive pole piece and a preparation method thereof and a battery, the positive pole piece comprises a positive current collector and a positive material coated on the positive current collector, the positive material comprises a positive active material, a conductive agent, a liquid retaining agent and an adhesive, the liquid retaining agent comprises superfine fibers, the diameter of the superfine fibers is 400-900mm, and the superfine fibers are added, so that the conductivity of the positive pole piece is improved. The superfine fibers can be filled in the pores of the positive pole piece, and the pores inside the superfine fibers can absorb a large amount of electrolyte, so that the pores inside the superfine fibers are filled with the electrolyte, the electrolyte absorption and retention capabilities of the positive pole piece are greatly improved, and meanwhile, the free electrolyte is greatly reduced, so that the liquid loss after formation and degassing of the battery can be reduced, and the service life of the battery is prolonged. And the long-cycle capacity retention rate and the high-temperature storage capacity retention rate of the battery are improved.

The invention provides solvent-free nonionic waterborne polyurethane resin as well as a preparation method and application thereof. The solvent-free nonionic waterborne polyurethane resin is prepared from the following raw materials: polymer polyol, diisocyanate, nonionic hydrophilic polyol, an emulsifier, an amine chain extender and an amino silane coupling agent, non-ionic hydrophilic polyol is adopted as an internal hydrophilic chain extender, and an emulsifier is added for synergistic emulsification, so that the water resistance of the obtained waterborne polyurethane resin is effectively improved, the water swelling property of the waterborne polyurethane resin is reduced, the jungle stability of the waterborne polyurethane resin is improved, and the waterborne polyurethane resin has the characteristics that the solid content is relatively high, and acetone does not need to be removed; the water resistance and alkali resistance of the obtained waterborne polyurethane resin are further improved by further introducing an amine chain extender and an amino silane coupling agent, so that the waterborne polyurethane resin is applied to the field of waterborne microfiber leather, and the prepared waterborne microfiber leather is good in hand feeling, fine in crease, good in resilience and qualified in jungle test.

The utility model discloses a spinneret assembly, which comprises a distribution plate and a spinneret plate provided with spinneret orifices, the distribution plate comprises a first runner used for simultaneously introducing a first component and a second component into the spinneret orifices, and a second runner used for introducing a third component into the spinneret orifices; the number of the first flow channels and the number of the second flow channels are respectively multiple, every two adjacent first flow channels are separated by one second flow channel, the multiple second flow channels are mutually separated or the axial leads of the second flow channels are mutually intersected at the same point, and the orthographic projection of the first flow channels and the orthographic projection of the second flow channels are all located in the orthographic projection range of inlets of the spinneret orifices; the spinneret assembly can continuously and stably eject composite fibers with normal sizes and specific structures on the basis of three components, and superfine fibers with at least one excellent effect in the aspects of elasticity, glossiness, strength such as tearing strength and the like can be obtained by removing single-component fibers in the composite fibers.

The application relates to a continuous macro-preparation device and method of a soft and elastic ceramic superfine fiber material, which sequentially comprises a feeding and liquid preparation system, a multi-jet uniform electrostatic spinning system, a low-temperature calcination system and a winding system. Raw materials are mixed, low-temperature dispersed and vacuum concentrated to obtain a sol; the sol and a polymer flow into a polymer mixing device to be mixed and bubble removed; the mixed sol flows into an inorganic component content control device to be pumped by negative pressure to obtain a spinning solution; the spinning solution flows into a multi-jet electrostatic spinning module to adjust and control the temperature, humidity and multi-directional differential speed during spinning to obtain a fiber membrane material or a fiber flake material; the fiber material is sequentially transmitted to a drying area, a microwave pretreatment area, a polymer removal area, an oxygen-poor atmosphere heat treatment area and a cooling area to be calcined in multiple temperature zones to obtain the soft and elastic ceramic superfine fiber material; and winding and packaging are realized to realize the continuous macro-manufacture of the soft and elastic ceramic superfine fiber material.

The invention belongs to the technical field of cosmetic preparations, and particularly relates to a microcapsule emulsion containing collagen and a preparation method thereof. According to the invention, tranexamic acid is utilized to adjust the pH value and Zeta potential value of a collagen solution system, so that the collagen shows the characteristics of lowest solubility and lowest conductivity in a state close to an isoelectric point, the microcapsule preparation containing the collagen is successfully prepared, and the purposes of improving the stability and transdermal absorbability of the collagen and improving the bioavailability of the collagen are achieved. And the skin state is improved in a slow-release manner.

The invention discloses a composite fabric production process and a composite fabric, and relates to the technical field of fabric production, the composite fabric comprises a fabric body, the fabric body comprises a base cloth layer, the base cloth layer is a textile material, the top of the base cloth layer is provided with a superfine fiber cloth, and the bottom of the base cloth layer is provided with a cotton fabric; the superfine fiber cloth and the base cloth layer as well as the base cloth layer and the cotton fabric are bonded through glue in a hot pressing manner. By arranging the pressing plate and the electric heating plate, the fabric is subjected to hot pressing through the pressing plate and the electric heating plate, the hot pressing time and force can be controlled, the bonding strength between the two kinds of fabric is better, pretreatment of the fabric can be achieved through the cleaning mechanism and the brushing mechanism directly arranged between the two kinds of fabric, and the cleaning efficiency is improved. The automation effect is improved, the fabric treatment is simpler and more convenient, the hot pressing procedure between the fabrics is simplified, and the practicability is improved.

The invention relates to the technical field of synthetic fiber manufacturing, in particular to meta-aramid fibrid and a preparation method thereof. According to the preparation method provided by the invention, the meta-position aramid polymer stock solution forms superfine fibers by utilizing an electrostatic dissolving and blowing technology in combination with hot air traction, and the superfine fibers are bonded or dispersed again by performing ultrasonic treatment subsequently, so that the meta-position aramid fibrid with a wide size distribution range is obtained, and the relatively fine fibers can be used as gap filling parts during paper forming; and the fibers with larger sizes provide better bonding capacity during paper forming, and the prepared paper sheet has excellent bonding performance. Tests show that after the meta-aramid fibrid obtained through the preparation method is used for preparing paper products, the tensile strength of the obtained paper products reaches 3 kN / m, the longitudinal elongation reaches 8.4%, the transverse elongation reaches 6.1%, the longitudinal initial tearing strength reaches 12.3 N, the transverse initial tearing strength reaches 8.2 N, and the breakdown strength reaches 26.2 kV / mm.

The invention relates to the technical field of breathable adhesive tapes, in particular to a double-layer composite high-breathability low-sensitivity adhesive tape and a preparation method thereof. The adhesive tape comprises a hydrophobic surface layer material, a high-breathability low-sensitivity composite adhesive and release paper. The high-breathability and low-sensitivity adhesive tape comprises a three-dimensional net-shaped breathable layer and a low-sensitivity adhesive layer. The hydrophobic surface layer material adopts a polyvinylidene fluoride electrostatic spinning nanofiber membrane with high specific surface area and porosity, so that the hydrophobicity and the adhesion with the lower layer material are improved; according to the high-breathability and low-sensitivity adhesive tape, polycaprolactone, a polylactic acid-glycolic acid copolymer and polyurethane are copolymerized to obtain a multifunctional three-dimensional net-shaped breathable layer; the high-breathability and low-sensitivity composite adhesive tape is prepared from dopamine modified polydimethylsiloxane microfibers decorated by oxidized dextran modified vinyl siloxane tip fibers, and the adhesive force and biocompatibility of the adhesive tape and skins with different roughness degrees are enhanced. Meanwhile, the lignosulfonate surfactant is added, so that the reproduction of bacteria and fungi in an adhesive tape attachment area can be inhibited.

The invention relates to a production method and production equipment of anti-mite and antibacterial uncertain island superfine fibers, which belong to the technical field of fiber fabric dipping finishing, and are characterized in that functional treatment of the uncertain island superfine fibers is realized by adding an antibacterial agent and an acaricide into supercritical fluid carbon dioxide, so that the produced superfine fibers have the functions of resisting bacteria and killing mites, and the anti-mite and antibacterial performance of the superfine fibers is improved. In order to well guide and treat the surface of the fabric when the supercritical fluid carbon dioxide is used for treating the surface of the fabric, a plurality of finishing guide roller groups are arranged in a zigzag channel, and each finishing guide roller group comprises a parallelogram adjusting frame and a plurality of spraying rollers arranged on a long rod of the parallelogram adjusting frame; the unfigured island superfine fiber fabric to be treated is wound on the material spraying roller in a staggered winding mode, front and back face dipping of the fabric is achieved through transverse movement of the material spraying roller on the unfigured island superfine fiber fabric to be treated, and dipping is more comprehensive and efficient.

The invention belongs to the technical field of non-woven materials and membrane separation, and particularly relates to a separation membrane supporting body with an interlocking structure and a preparation method thereof.The method comprises the steps that firstly, low-crystallinity and sulfonation-modified superfine polyester fibers are introduced into compact layer slurry, and framework polyester fibers and polyester heat bonding fibers are introduced into framework layer slurry; then forming a double-layer wet net by utilizing a double-flow-channel wet-process net forming device, applying gradient increasing negative pressure on one side of the skeleton layer, and enabling the superfine fibers to migrate from the compact layer to pores of the skeleton layer in a controlled manner by virtue of a viscous dragging effect of directional high-speed water flow on the superfine fibers, so as to form a gradient transition interlocking interface layer; finally, plastic deformation of the low-crystallinity fibers and fusion welding of the bonding fibers are utilized, an interlayer structure is locked through segmented hot pressing of a rough pressing section and a fine pressing section, and then cooling shaping is conducted. The prepared separation membrane support has the advantages of excellent interlayer peel strength, ultralow surface roughness, high air permeability, wide adaptability and high safety of the preparation process.

The invention discloses a warp-resistant mineral reinforced PC / PBT alloy material with dimensional stability and a preparation method thereof, and relates to the technical field of polymer composite materials. The preparation method comprises the following steps: weighing polycarbonate, polybutylene terephthalate, ureido pyrimidone-polydimethylsiloxane, epoxy polyhedral oligomeric silsesquioxane, polyimide coated halloysite nanotubes, magnesium-aluminum hydrotalcite, perfluoroalkyl modified boron nitride nanosheets, liquid crystal polymer microfibers, modified PVA (Polyvinyl Alcohol) fibers and a silane coupling agent KH550 according to a ratio; the preparation method comprises the following steps: pre-mixing polycarbodiimide and a composite antioxidant to obtain a mixture, mixing, adding into a double-screw extruder, extruding and granulating, drying, carrying out injection molding, and standing at constant temperature and constant humidity to obtain the composite material. The invention has the significance of providing the PBT / PC alloy material with dimensional stability, warping resistance, low shrinkage rate, low hygroscopicity, creep resistance, impact resistance, arc resistance and chemical corrosion resistance for consumer-grade and industrial-grade underwater plastic parts.

The invention provides a fiber-reinforced silicon dioxide aerogel composite material, which is characterized in that a fiber felt formed by two kinds of glass fibers is used as a reinforcing material, one kind is hollow short fibers with the average diameter of 5.0-25 microns and the length of 0.5-2.0 mm, the other kind is superfine fibers with the average diameter of 0.6-5.0 microns and the length of 0.5-3.0 mm, and the difference between the average diameters of the two kinds of fibers is at least 3 microns. The fiber reinforced composite material provided by the invention has very strong mechanical properties and very low heat conductivity coefficient, and can exert excellent thermal insulation efficiency as a building thermal insulation material.

The invention provides gas-electricity coupled gelatin and sodium alginate composite hydrogel as well as a preparation method and application thereof, and belongs to the technical field of biological materials. The gas-electricity coupled gelatin and sodium alginate composite hydrogel disclosed by the invention is prepared from the following raw materials in parts by weight: 1 to 10 parts of gelatin, 1 to 10 parts of sodium alginate, 0.1 to 1 part of polyphenol modified fibroin microfiber coupled with 3, 4-ethylenedioxythiophene, 0.05 to 0.5 part of sodium hydrosulfide loaded bovine serum albumin nanoparticles, 1 to 10 parts of polyethylene glycol diglycidyl ether and 100 to 200 parts of water. The hydrogel has good biocompatibility and mechanical properties, is good in stability, can slowly release hydrogen sulfide gas, has relatively good conductivity, has anti-inflammatory and immunoregulation effects, can attract stem cells and promote angiogenesis and bone formation, has an excellent repair effect on diabetic periodontitis, and has a good application prospect.

The invention relates to a nanofiber membrane and a preparation method and application thereof, the preparation method comprises the following steps: (1) mixing polyurethane, nano lanthanum oxide, a waterproof agent and a solvent to obtain a spinning solution; (2) performing electrostatic spinning on the spinning solution to obtain an electrostatic spinning membrane; and (3) spraying the after-finishing liquid on the electrostatic spinning membrane, and then carrying out heating treatment to obtain the nanofiber membrane. Polyurethane is stretched into superfine fibers through an electrostatic spinning technology, an ultrahigh porous membrane similar to a spider web is prepared, billions of nanopores are formed in per square centimeter of the porous membrane, so that the porous membrane has high air permeability and waterproof and moisture-permeable performance, fibers are bound through a fiber bonding point technology, and the fiber bonding point technology is adopted, so that the waterproof and moisture-permeable performance of the membrane is improved. Therefore, the fabric has excellent washing resistance. The nano lanthanum oxide heating functional particles are added, so that the nanofiber membrane is endowed with heating and heat storage functions, and the washing resistance of the fabric is further improved.

The utility model relates to the technical field of microfiber suede leather, and discloses an automobile seat microfiber suede leather with a heating function, the automobile seat microfiber suede leather comprises a microfiber suede leather forming body, the microfiber suede leather forming body is composed of an external airtight weather-proof layer, an internal damping contact layer, a positioning isolation layer, a heat insulation layer and a heat-resistant protection layer; the heat-resistant protection layer is located at the bottommost end, the heat insulation layer is located at the top of the heat-resistant protection layer, and the positioning isolation layer is located at the top of the heat insulation layer; a buffering inner cavity can be reserved between the damping contact layer and the adhesion fabric layers which are connected and fixed through the adhesion sealing layer, and limiting and fixing are achieved through the two sets of external airtight weather-proof layers which are connected and fixed, so that it is guaranteed that the soft package protrusions have effective moving space, and the soft package protrusions can move into the buffering inner cavity when being extruded; therefore, the soft package protrusions on the two sides are extruded in the buffering inner cavity, the buffering function is achieved, and deformation and ineffectiveness are avoided.

The invention discloses leather-imitated superfine fiber layered synthetic leather and a production process thereof, and belongs to the technical field of synthetic leather. The production process of the synthetic leather comprises the following steps: carrying out superfine fiber alkali treatment and DMC / HEMAP / UV-1 monomer graft copolymerization modification; forming a fiber net by air laying and gradient needling; anionic water-based PU resin containing wood powder is used for impregnation reinforcement, and soft hydrolysis-resistant water-based PU resin is used for coating to form a porous surface layer; and performing wet solidification, bionic embossing, cationic dye dyeing and surface finishing to obtain a finished product. Through fiber modification, gradient structure, bi-component PU cooperation and process optimization, the problems that traditional synthetic leather is hard in hand feeling, poor in breathability, low in texture simulation degree, difficult to dye, weak in interlayer binding force and the like are solved, and the product has high simulation degree and excellent comprehensive performance and stability.

The invention provides microfiber spinning oil and a preparation method thereof, and belongs to the technical field of textiles. The microfiber spinning oil comprises the following components in parts by mass: 12-17 parts of castor oil, 3-8 parts of white oil, 25-30 parts of polyurethane resin, 1-3 parts of modified filler, 2-5 parts of an antistatic agent, 6-10 parts of a wetting agent, 4-8 parts of an emulsifier, 1-3 parts of a defoaming agent, 1-3 parts of a flatting agent, 2-5 parts of a dispersing agent and 30-36 parts of deionized water. The prepared microfiber spinning oil has good stability, layering and precipitation phenomena cannot occur after the microfiber spinning oil is placed for a long time, superfine fibers treated by the prepared microfiber spinning oil have excellent weather resistance and mechanical properties, and the microfiber spinning oil has wide application prospects.

The invention discloses an aerospace electromagnetic shielding material based on modified polytetrafluoroethylene and a preparation method, and belongs to the technical field of nano materials. The method comprises the following steps: by taking polytetrafluoroethylene dispersion resin as a matrix, adding an extrusion aid and carbon nanotubes, stirring, curing, pre-pressing to form a green body, pushing and calendering to prepare a base film, and drying, stretching and mechanically splitting to form a microfiber layer; meanwhile, the polytetrafluoroethylene, the conductive filaments and the conductive reinforcing agent are twisted to prepare a twisted layer; the microfiber layer serves as an outer layer, the twisted layer serves as an inner layer, an electromagnetic shielding layer is woven, finally, the electromagnetic shielding layer is soaked in shielding liquid, dried and subjected to hot press forming, and the electromagnetic shielding material is prepared. According to the material, by constructing a continuous conductive network, excellent electromagnetic shielding effectiveness and low resistance are achieved, and the requirements for light weight, high conductivity and electromagnetic interference resistance in the aerospace field are met. The process parameters are strictly controlled, it is ensured that the fiber structure and the conductivity are optimized, and the method is suitable for electromagnetic protection in the extreme environment.

The invention discloses a polyglutamic acid-based composite degradable dressing as well as a preparation method and application thereof. The blending dressing is prepared from polyglutamic acid and hyaluronic acid or polyvinyl alcohol through an electrostatic spinning technology, the combination of hyaluronic acid and polyglutamic acid can increase the local anti-inflammatory performance of the blending dressing, and the combination of polyvinyl alcohol and polyglutamic acid can enhance the degradability and film-forming property of the blending dressing; the polyglutamic acid-based composite degradable dressing prepared by adopting an electrostatic spinning method is actually non-woven fiber membrane cloth formed by superfine fibers, the fibers have high surface area and porosity, the composition and the structure of the fibers can be adjusted according to different application requirements, and multifunctional integration is realized; fiber membrane dressings with different shapes and sizes can be prepared, the requirements of different skin parts are met, and traditional gauze can be replaced; the degradable dressing prepared by the preparation method disclosed by the invention has good degradability and skin-friendly property, good ductility, good biological safety and small irritation, and has a good application prospect.

The invention belongs to the technical field of sofa leather production, and discloses a microfiber suede sofa leather production winding device which comprises a base, a supporting assembly is movably installed at the top end of the base, a machine base is fixedly installed at the top end of the supporting assembly, and a winding roller is movably installed in the middle of the machine base. Clamping grooves are formed in the positions, close to the upper end and the lower end, of the left side and the right side of the machine base correspondingly, limiting clamping plates located on the outer side face of the winding roller are movably clamped into the clamping grooves correspondingly, and limiting assemblies are fixedly installed on the left side and the right side of the machine base correspondingly. Through cooperation between the supporting assembly and the power assembly, the device can rapidly complete the power transmission process only by controlling the supporting assembly to drive the machine base to descend and cooperating with the power assembly, meanwhile, power transmission can be rapidly relieved during dismounting, the whole process is rapidly completed, a complex dismounting process is not needed, and the dismounting efficiency is improved. Rapid separation of the winding roller can be achieved, and the winding efficiency is improved.