42 results about "Porous sheet" patented technology

This provides an improved dissolvable solid article with a specific aspect ratio. Such dissolvable solid article has a multilayer structure comprising two or more flexible, dissolvable, porous sheets, while each of which comprises a water-soluble polymer and a surfactant and is characterized by a Percent Open Cell Content of from 80% to 100% and an Overall Average Pore Size of from 100 μm to 2000 μm. The multilayer dissolvable solid article is characterized by a maximum dimension D and a minimum dimension z; and wherein the ratio of D / z ranges from 1 to 10.

The application discloses a zinc extraction process from secondary zinc oxide, and belongs to the technical field of zinc oxide preparation. In the rotary kiln roasting, composite porous flaky reducing carbon with waste paper, rice husk and wooden chips as main raw materials is used as a reducing agent. Compared with the commercially available anthracite, the composite porous flaky reducing carbon has low cost, realizes resource recycling, and has a large specific surface area and porous properties. A multi-level structure of flaky layers and pores is constructed, so that the contact sites of the composite porous flaky reducing carbon and the secondary zinc oxide are increased. The porous structure can avoid the caking of the material layer caused by the stacking and agglomeration of the flaky layers, and avoid the obstruction of gas flow, so that the pain points of the traditional reducing agent, such as local agglomeration and insufficient contact, are solved. The surface of the composite porous flaky reducing carbon is deposited with calcium oxide. The presence of the calcium oxide can react with a small amount of sulfur elements generated in the rotary kiln roasting process of the composite porous flaky reducing carbon, so as to generate calcium sulfate and reduce the content of sulfur dioxide.

The disclosure provides a metal ion doped lithium iron phosphate material and a preparation method and application thereof, and relates to the technical field of lithium batteries. The metal ion doped lithium iron phosphate material comprises flaky lithium iron phosphate and metal ions doped on the flaky lithium iron phosphate, and the flaky lithium iron phosphate has a porous structure. The method comprises the following steps: using an organic metal compound as a deposition raw material to deposit a carbon layer and metal oxide particles on the surface of a porous Fe2O3 flaky precursor to obtain a composite material; mixing the composite material, a lithium source and a phosphorus source according to a stoichiometric ratio, and then drying and sintering to obtain an M-LiFePO4 material. The M-LiFePO4 prepared by the disclosure has good uniformity and is not prone to agglomeration, inherits the two-dimensional flaky morphology of the precursor material and has a porous structure, has good rapid charging and discharging capacity, and improves the rate performance of the lithium iron phosphate material through doping of metal ions.

In specific embodiments, provided is a material for preventing adhesion of membranes in an ophthalmic surgery for treatment of glaucoma or the like without using mitomycin-C or the like. Particularly provided is such material, which is easy to handle and has no risk of histolysis or infections. In a production method of a preferred embodiment, prepared are: aldehyde-modified dextran (first reactant) having weight-average molecular weight of 10,000-5,000,000 and introduced aldehyde group-per-anhydrous glucose unit (mol / AGU) of 0.4-0.7; and succinic anhydride-added poly-L-lysine (second reactant) having weight-average molecular weight of 1000-100,000 and having residual amino group ratio of 80-99%; then, they are mixed together so that aldehyde group-to-amino group molar ratio becomes 0.9-1.1 and are reacted in presence of water so that polymer concentration becomes 8-20%; and a hydrogel produced by the reaction, or a suspension before gelation, is freeze-dried to produce a porous sheet having a thickness of 0.1-0.8 mm.

Disclosed is a secondary battery. According to the present disclosure, the secondary battery includes a case, an electrode assembly disposed inside the case, a porous sheet disposed between the case and the electrode assembly and configured to temporarily accommodate an electrolyte inside the case or discharge the accommodated electrolyte, and a diffusion guide disposed on the porous sheet and configured to guide the electrolyte discharged from the porous sheet to flow inside the case.

The invention discloses a preparation method of a supported high-entropy metal oxide catalyst for photo-thermal methanol-water reforming hydrogen production. The preparation method is specifically implemented according to the following steps: step 1, preparing CeO2 gel; step 2, grinding the CeO2 gel obtained in the step 1 serving as a raw material to obtain CeO2 gel powder, and calcining the CeO2 gel powder to obtain a porous sheet CeO2 oxide; step 3, loading a plurality of metal ions on the porous sheet CeO2 oxide obtained in the step 2 to prepare multi-metal loaded CeO2 powder; and 4, calcining the multi-metal loaded CeO2 powder obtained in the step 3, and grinding to obtain the loaded high-entropy metal oxide catalyst. The problems of slow reaction kinetics, long activation time and low hydrogen production efficiency of the existing low-temperature methanol-water reforming hydrogen production catalyst in a temperature interval of lower than 150 DEG C are solved.

Provided is an apparatus for producing a slurry-impregnated sheet constituted of a fiber sheet or a porous sheet impregnated with a slurry prepared by dispersing particles in a solvent. The apparatus includes: a conveying device configured to convey the fiber sheet or the porous sheet; a coating device configured to meter and apply the slurry to the fiber sheet or the porous sheet; and an impregnation device disposed downstream of the coating device in a sheet conveying direction and configured to apply an external force to the fiber sheet or the porous sheet to impregnate the fiber sheet or the porous sheet with the particles. The coating device includes a die.

The invention relates to the technical field of amphibious automobiles, and discloses an amphibious automobile trim panel mounting structure and an amphibious automobile. The amphibious automobile trim panel mounting structure comprises an automobile door lower trim panel and an automobile door outer panel metal plate; the automobile door outer plate metal plate is of a hole-free metal plate structure, an upper welding support and a lower welding support are welded to the automobile door outer plate metal plate, a buckle piece and an installation hole are formed in the corresponding positions of the automobile door lower decoration plate respectively, and the buckle piece on the automobile door lower decoration plate is connected to the upper welding support in a clamped mode in the Y direction. The position of the mounting hole corresponds to the position of the lower welding support, the axis direction of the mounting hole is the Z direction, and the fixing piece penetrates through the mounting hole and a Z-direction through hole in the lower welding support in the Z direction, so that the vehicle door lower decoration plate and the vehicle door outer plate metal plate are fixed; the automobile door outer plate metal plate does not need to be perforated in the whole process, a water seepage channel can be completely eradicated from the source, the sealing ring at the upper waterproof buckle position and the lower waterproof gasket can form radial and axial double sealing, the requirement for 2 m water depth and long-term wading of an amphibious automobile is met, and electrical components in an automobile body are effectively protected.

Provided is an inter-cell structure which is suitable for maintaining a buffer function for relaxing stress from a lithium ion battery cell with high durability while achieving a size that is suited to the cell. Provided is an inter-cell structure for use in a battery module or a battery pack including a plurality of arrayed lithium ion battery cells, the inter-cell structure being disposed between adjacent cells among the plurality of cells. The inter-cell structure has: a bag body that defines a sealed space; and a fluid such as a gas and a porous sheet in the sealed space. The bag body is formed of a laminated film including a metal layer and a resin layer, and has a sealing end part in which the innermost layers of first and second film parts of the laminated film are joined to each other so as to seal the sealed space. The porous sheet is positioned at a distance from the sealing end part of the bag body. The bag body has, between the sealing end part and the porous sheet, a folded part in which the first and second film parts overlap with each other and are folded with the first film part being on the inner side.

The invention belongs to the technical field of air purification, and particularly relates to an activated carbon adsorbent with ultra-high molecular weight polyethylene fibers as a framework and a preparation method of the activated carbon adsorbent. The activated carbon adsorbent is of a porous sheet structure and comprises 85-95 wt% of activated carbon powder, 1-10 wt% of a polymer and 0.2-3.0 wt% of an auxiliary agent, wherein the polymer is ultra-high molecular weight polyethylene or a mixture of ultra-high molecular weight polyethylene and high-density polyethylene; the polymer presents a cross network skeleton structure in a fibrous form, and the active carbon powder and the auxiliary agent are attached to the polymer fiber. The activated carbon adsorbent has the advantages of extremely low dust capacity in the use process, high content of effective components, small bed resistance, high harmful gas adsorption rate and the like.

To provide a sheet with improved porous structure formation capabilities compared to conventional sheets. [Solution] A porous sheet containing a thermoplastic resin, inorganic particles, and silicone oil, having numerous pores. The porous sheet contains 30% by mass or more of inorganic particles, and the silicone oil and inorganic particles contained in the porous sheet satisfy a predetermined relationship. Preferably, the porous sheet has a plurality of stem fibers extending in one direction and fibril fibers extending between the stem fibers and having a smaller diameter than the stem fibers. Preferably, the plurality of stem fibers include one stem fiber and other stem fibers branched from that stem fiber, and also have voids between the stem fibers.

This invention discloses an automatic sheet metal flipping device for edge-folding units, involving a machining technology solution. It includes a movable conveyor roller, a roller base frame, a movable flipping suction cup gripper, and a flipping base frame. The device integrates feeding, centering, flipping, and conveying functions. Precise positioning is achieved through a servo-driven centering and alignment device. The movable flipping suction cup gripper can complete 180° flipping in both directions. Individual suction cup components are adjustable and adaptable to large-format, heavy-duty, irregularly shaped, and porous sheets. Servo control and synchronous belt drive ensure smooth operation and precise positioning. The frame is fixed with detachable bolts, and the bottom leveling feet adapt to different sites. It supports parallel operation and single-piece operation, and can be seamlessly integrated into existing automated production lines, effectively improving production efficiency and reducing scrap rates.

To provide a porous sheet that is excellent in performance as a separator for an electrochemical element, in that it is thin but does not cause short circuits. The porous sheet is made of fibers and has a thickness of 4.8 to 30.0 μm, an air resistance of 1 to 1000 seconds / 100 ml, and a valley area of ​​1.0 to 38.0 mm as measured using a three-dimensional white light interference microscope (manufactured by BRUKER). 2 The present invention also provides an electrochemical element including this porous sheet as a separator for the electrochemical element.

The invention provides a conveying device and a conveying method for conveying workpieces in a state of suppressing reduction of quality of the workpieces. A transport device (1) for transporting a single workpiece having, as an adsorption surface, a porous sheet provided on the outermost surface, the transport device being provided with: an input unit (11) for setting an adsorption condition in which an adsorption pad (32) is adsorbed to the workpiece before transport of the workpiece; and a calculation unit (12) that determines whether or not a sag amount greater than a predetermined amount is generated in the workpiece when the adsorption pad (32) is adsorbed to the workpiece and lifted in accordance with the adsorption condition, determines that the workpiece is to be conveyed if the sag amount is equal to or less than the predetermined amount, and determines that the workpiece is not to be conveyed if the sag amount is greater than the predetermined amount.

Geopolymer sheets can be formed by applying a geopolymer composition on a sheet. In some aspects, the sheet can be a porous sheet or non-porous sheet. The geopolymer composition can be prepared from an aqueous formulation of one or more metal silicates, one or more metal oxides, one or more water-soluble caustic agents, and water. In some implementations, the geopolymer composition can be free of, or substantially free of, large solid particles comprised of the metal silicate, metal oxide and water-soluble caustic agent. Such geopolymer sheets can be readily applied to an underlying substrate to transfer a geopolymer thereon and improve the fire resistance of the underlying substrate.

A vacuum pressing apparatus (100) comprising at least:-a support (102) having a first element (104) and a cover (106) movable relative to the first element (104); at least one vacuum source (110) comprising a control unit (114) for actuating the at least one vacuum source and connected to the at least one vacuum port (108) of the support (102); and a vacuum dispensing pad (120) comprising at least: a first porous anti-adhesion sheet (2001) disposed on top of the first element (104) and covering the at least one vacuum port (108); a stack of breathable mesh layers (204) disposed on top of the first porous sheet (2001); and a second porous anti-adhesion sheet (2002) disposed on top of the stack (204) of breathable mesh layers, said second sheet (2002) being connected to the first sheet (2001), said second sheet and said cover being adapted to sandwich the product (1) to be compacted therebetween.

The invention relates to the technical field of materials, in particular to zinc oxide materials with different morphologies and a preparation method and application thereof.The preparation method comprises the steps that a zinc source is subjected to a hydrothermal reaction in a reaction system, and a precursor is prepared; carrying out calcination reaction on the precursor to prepare zinc oxide materials with different morphologies; wherein the zinc oxide materials with different morphologies comprise porous sheet-shaped zinc oxide, rhombic multi-stage zinc oxide, micron-flower-shaped zinc oxide and nano-rod-shaped zinc oxide. The preparation method disclosed by the invention has the characteristics of simplicity and convenience in operation, mild conditions, high product yield and easiness in industrial mass production; and the prepared zinc oxide materials with different morphologies have application prospects in the field of gas sensing.

This method for manufacturing a solid electrolyte-containing sheet comprises: a first step of applying a slurry containing a solid electrolyte and a dispersion medium onto a substrate to form an initial coating film; a second step of disposing a porous sheet on the initial coating film; a third step of applying an additional slurry onto the porous sheet to form a precursor sheet; and a fourth step of drying the precursor sheet to obtain the solid electrolyte-containing sheet. In the second step, the porous sheet is disposed on the initial coating film in a state of containing the dispersion medium.

The fixing structure of the present invention is a structure, comprising: a porous sheet having an opening through which an insertion member led from inside of a living body to outside of the living body is insertable, wherein the sheet is composed of a non-resorbable material having biocompatibility; and a filamentary body sewn to the surface of the sheet so as to form an protruded and recessed structure that provides resistance to a relative movement in an extending direction of the sheet with respect to a target site of a living body into which the insertion member is inserted.

A multilayer piezoelectret film element, a polymeric porous sheet, and a method for preparing them are disclosed. The present disclosure ensures that the gas can be ionized without damaging the polymeric porous sheet by adjusting the gap between pores and the dielectric strength of the polymeric porous sheet in the multilayer piezoelectret film element. The polymeric porous sheet has a high piezoelectric constant after electric polarization and surface metallization treatment, and can generate a significant amount of charge under mechanical pressure, thereby exhibiting high sensitivity in applications such as piezoelectric sensors, and solving the problems of low piezoelectric activity and fast loss of piezoelectric activity of the polarized polymeric piezoelectret film element in the art. Moreover, the production process is simple, which can ensure continuous production of the polymeric piezoelectret film element.

A heat and mass exchanger is provided. The heat and mass exchanger includes a parting sheet, a first bed disposed on a first side of the parting sheet and including an amine immobilized in sheet form and a second bed disposed on a second side of the parting sheet opposite the first side and including an amine immobilized in sheet form or a parting sheet, a first bed disposed on a first side of the parting sheet and including a porous layer with an amine embedded therein and a second bed disposed on a second side of the parting sheet opposite the first side and including a porous layer with an amine embedded therein.

This electrode comprises a support sheet and a metal porous sheet. The support sheet has a first main surface. The metal porous sheet has a second main surface and is disposed on the support sheet such that the second main surface faces the first main surface. In a plan view, the apparent area of the support sheet is greater than the apparent area of the metal porous sheet.

The invention belongs to the technical field of industrial solid waste resource utilization and wastewater treatment, and particularly relates to polyacrylamide modified iron mud biochar as well as a preparation method and application thereof. According to the invention, iron mud is used as a raw material, polyacrylamide is used as a flocculant and a slow-release nitrogen source at the same time, and the nitrogen-doped iron mud biochar is prepared through hydrothermal reaction and oxygen-limited pyrolysis. The material has a porous sheet layer and a core-shell structure, and zero-valent iron nanoparticles are tightly coated by a carbon shell. When being used as a catalyst for activating peroxydisulfate to treat antibiotic wastewater, the catalyst shows excellent catalytic activity and universality, and can efficiently degrade various antibiotic pollutants. The catalytic system takes singlet oxygen as a dominant non-free radical path, and has strong anti-interference capability and high reaction selectivity. According to the method, high-value recycling of the iron sludge is realized, and an efficient solution is provided for antibiotic wastewater treatment.

The application discloses a lithium lanthanum zirconium oxide-based solid electrolyte and a preparation method and application thereof. The preparation method comprises the following steps: adding a lithium source, a lanthanum source and a zirconium source into water, and obtaining a first mixed solution after mixing; or, adding the lithium source, the lanthanum source, the zirconium source and a doping metal source into water, and obtaining the first mixed solution after mixing; adding a dispersing agent and carbon quantum dots into the first mixed solution, and obtaining a second mixed solution after stirring; mixing the second mixed solution with a precipitant, co-precipitating, drying, and obtaining a co-precipitated precursor; and sintering the co-precipitated precursor, and obtaining the lithium lanthanum zirconium oxide-based solid electrolyte. In the application, the carbon quantum dots are used as nucleation sites and a one-step lithium mixing method is used as a morphology regulator, so that the porous sheet-shaped two-dimensional lithium lanthanum zirconium oxide-based solid electrolyte is prepared. The preparation method provided by the application can maintain the sheet-shaped morphology advantage of the lithium lanthanum zirconium oxide-based solid electrolyte, obtain a larger specific surface area, and effectively improve the conductivity of the composite solid electrolyte.

This invention relates to the field of turret punch technology, and more particularly to a CNC turret punch for multi-hole sheet metal production. It includes: a main body, on which a punch module and a lower turntable are mounted; a ring-shaped lower die base is fixedly connected to the upper side of the lower turntable; a lower die holder is fixedly connected to the upper side of the lower die base; a lower die is fixedly connected to the lower die holder; and a separation mechanism for separating scrap from the punch is provided within the lower die holder. The separation mechanism includes: an L-shaped component, a mounting ring, two symmetrically distributed swing springs, two symmetrically distributed clamping blocks, and a limiting ring; the two clamping blocks are respectively fixed to the upper ends of adjacent swing springs. This invention utilizes the two clamping blocks to actively clamp the scrap adhering to the lower side of the punch, applying a rigid constraint force to the scrap to promote separation from the punch, thus reducing the probability of the punch carrying scrap away, and consequently reducing the probability of damage to the sheet metal, the punch, and the cutting edge of the lower die.

The invention provides a perforated sheet positioning device, a feeding device, a carrying and pressing device and a sheet pasting device and method, and relates to the field of outer packaging product machining. The sheet pasting device comprises a frame body, the perforated sheet positioning device, the perforated sheet feeding device, a box body positioning device and the perforated sheet carrying and pressing device; the perforated sheet positioning device is mounted on the frame body; the perforated sheet feeding device is arranged on the feeding side of the perforated sheet positioning device; the box body positioning device is arranged on the discharging side of the perforated sheet positioning device; the perforated sheet carrying and pressing device is located above the perforated sheet positioning device and the perforated sheet feeding device. Precise positioning and bonding of the sheet and the box body are achieved through automatic equipment, the problem that hole position deviation is prone to being caused by manual operation is effectively solved, the alignment precision of sheet holes and box body holes can be stably kept in the continuous production process, the bonding quality is greatly improved, the production speed is increased, and meanwhile the production efficiency is improved. And the qualified rate of products is obviously improved.

The application discloses praseodymium-neodymium oxide and a preparation method thereof. The preparation method comprises the following steps: 1) adding a praseodymium-neodymium chloride solution and ammonia water into an ammonium acetate solution in a parallel flow mode, performing solid-liquid separation after the reaction is completed, and obtaining a praseodymium-neodymium oxide precursor; 2) performing calcination on the praseodymium-neodymium oxide precursor, and obtaining praseodymium-neodymium oxide. The praseodymium-neodymium oxide has a porous sheet structure. The praseodymium-neodymium oxide with the porous sheet structure can be obtained by using the preparation method.

This fixing device is provided with a porous sheet body (2), a device main body (3) provided with a through-hole (31), the device main body (3) having a flange section (32) extending outward at a predetermined width along the outer periphery of a first end section (31a), and an annular clamping member (4) that can be attached to the outside of the first end section (31a) of the through-hole (31) and that can be inserted into the through-hole (31), the device main body (3) having a flange section (32) extending outward at a predetermined width along the outer periphery of the first end section (31a) of the through-hole (31). The flange section (32) has a first surface (32a) that serves as the outside of the body in a state where the fixing device (1) is attached to the living body, and the sheet body (2) is inserted through a first end section (31a) of the insertion section (31) and is sandwiched between the first surface (32a) of the flange section (32) and the sandwiching member (4). With such a structure, it is possible to provide a fixing device capable of suppressing the generation of steps between a biocompatible sheet embedded in a living body and the living body.

This application belongs to the field of tunnel engineering construction technology, and particularly relates to a sheet-like nano C-S-H crystal nucleus, its preparation method, sprayed concrete, and its application method. Addressing the industry pain points of existing high-temperature tunnel shotcrete, such as abnormal hydration, insufficient early strength, high rebound rate, poor durability, and easy agglomeration and low nucleation activity of existing C-S-H crystal nuclei, this application uses calcium nitrate and sodium silicate as raw materials. Through a combination of processes including low-speed dropwise controlled precipitation, in-situ modification with TPEG-type polycarboxylate dispersant, and low-temperature post-treatment, loose, porous, plate-like C-S-H crystal nuclei with a diameter of 50-100 nm are obtained. These nuclei are then incorporated into shotcrete at 1.0%-1.5% of the total mass of cementitious materials. Combined with an online mixing of accelerators and a high-temperature aggregate pre-cooling construction process, the shotcrete strength can be increased by more than 30% in 8 hours to 3 days, the construction rebound rate can be reduced to below 8%, and the 28-day impermeability grade can reach P15. This method is suitable for tunnel conditions with high ground temperatures above 35℃ and high corrosion. The process is simple, cost-controllable, and suitable for large-scale engineering applications.

A method for manufacturing a fiber mat includes a step of dispersing fine fibers in a dispersion medium (41) and a step of matting the dispersed fine fibers. The fine fibers have a fiber length that is smaller than a pore diameter of a papermaking wire (20). The step of matting includes a step of picking up the dispersed fine fibers to a micro-porous sheet (10) having a pore diameter that is smaller than the papermaking wire (20) and disposed on the papermaking wire (20).