17 results about "Polyethylene membrane" patented technology

This invention discloses a fire-retardant battery separator, its preparation method, and a fire-retardant battery, relating to the field of battery separator technology. In preparing the fire-retardant battery separator, this invention involves reacting a mixture of diglyceride borate and trimellitic anhydride chloride to obtain a flame-retardant monomer; polymerizing 4,4'-diaminodiphenyl ether and the flame-retardant monomer, followed by electrostatic spraying to obtain polyamic acid microspheres; dehydrating and drying the polyamic acid microspheres to obtain polyimide microspheres; etching and acidifying the polyimide microspheres to obtain carboxylated polyimide microspheres; grafting propylene-based phosphoric acid and acrylic acid copolymers onto the surface of a polyethylene film to obtain a modified polyethylene film; and coating the carboxylated polyimide microspheres onto the surface of the modified polyethylene film to obtain the fire-retardant battery separator. The fire-retardant battery separator prepared by this invention exhibits excellent flame retardancy, wetting, and thermal stability.

This invention discloses a method for preparing a thermally stable multilayer battery separator, relating to the field of battery materials technology. The battery separator of this invention comprises a modified polyethylene film and a coating applied to at least one surface of the modified polyethylene film. The modified polyethylene film is obtained by mixing polyethylene, poly-2,6-dimethyl-1,4-phenyl ether, and maleic anhydride-grafted polyethylene in a mass ratio of 5-7:2-3:1-2, extruding the mixture into a film, and then subjecting it to corona treatment. The coating is obtained by mixing modified nano-titanium dioxide containing ester groups, a solution of 3-(3-(aminomethyl)phenyl)-2,2-difluoropropionitrile, and ethanol in a mass ratio of 1-3:5-8:1-3, adding a small amount of catalyst to obtain a coating solution, and then coating and drying the mixture, significantly improving the thermal stability of the battery separator.

The present invention relates to a multilayer polyethylene film for soil solarisation comprising two linear low density polyethylenes, a soil solarisation system comprising the multilayer polyethylene film and the use of the multilayer polyethylene film for soil solarisation.

The application discloses a processing technology of a membrane composite filter material and relates to the field of filter materials, which comprises a polyurethane-based membrane, a polypropylene membrane fixed at the bottom end of the polyurethane-based membrane, a polyethylene membrane fixed at the top end of the polyurethane-based membrane and the bottom end of the polypropylene membrane, a plurality of through holes penetrating through the polyethylene membrane formed in the polyethylene membrane, antibacterial fabric fixed on the side of the polyethylene membrane away from the polyurethane-based membrane and the polypropylene membrane, and tensile fiber cloth fixed on the side of the antibacterial fabric away from the polyethylene membrane. The antibacterial fabric can inhibit bacteria, so that the impurities and bacteria filtered by the polyurethane-based membrane and the polypropylene membrane cannot continue to breed and corrode the filter material.

This invention relates to the field of polymer molding materials. A functional color-printed composite packaging film of ultra-high molecular weight polyethylene is disclosed, which is formed by curing a polyethylene film substrate, p-hydroxybenzoic acid, polyethylene glycol diacrylate, laccase, and acrylate ink monomers. The film is formed by covalently coupling quinone radicals generated from p-hydroxybenzoic acid and polyethylene glycol diacrylate under laccase catalysis to the substrate surface, forming a polyethylene glycol grafted interlayer. Subsequently, ultraviolet light-initiated polymerization is performed on the surface of the interlayer to form a cross-linked and cured ink layer. This method utilizes the covalently bonded grafted interlayer to block the rearrangement of non-polar molecular chains of the substrate to the surface, maintaining surface polarity stability, and enabling the ink layer and substrate to possess the highest standard peel strength, with no blistering or peeling of the ink layer under boiling water conditions.

The application discloses a kind of high pressure polyethylene film tensile resistance detection device, it is related to high pressure polyethylene film detection technical field, including testing machine body, lifting clamp and sample switching mechanism;The sample switching mechanism includes turntable and lower clamp, the lower clamp is provided with multiple groups, and it is equidistantly distributed on the turntable, the lower clamp includes fixed clamp and movable clamp, the movable clamp is used to fixedly hold the top of sample film, the fixed clamp is used to fixedly hold the bottom of sample film, the fixed clamp is fixedly connected with turntable, and the movable clamp is detachably arranged on the turntable.The application simultaneously distributes multiple groups of lower clamp on the turntable to hold multiple sample films or clamp one sample film, and then directly detects, clamps the next sample film during detection, and after detecting each sample film, the next sample film is switched by the rotation of turntable to detect, effectively saves detection time, and improves detection efficiency.

The application relates to the field of composite films, and particularly discloses an easy-to-tear composite film and a preparation method thereof. The easy-to-tear composite film comprises, from top to bottom, a printing film, a first adhesive layer, an aluminum foil intermediate layer, a second adhesive layer and an inner layer heat-seal polyethylene film; wherein the printing film is a polyethylene terephthalate film; the first adhesive layer comprises the following raw materials in parts by weight: 75-80 parts of a modified polyurethane resin, 3-4 parts of a hyperbranched polymer, 2-4 parts of a curing agent, 70-80 parts of ethyl acetate and 0.5-0.8 parts of methyl methacrylate phosphate; in addition, the easy-to-tear composite film prepared by the application has good impact resistance, good anti-peeling performance and good moisture resistance.

Described are ligand-modified porous membranes that include a porous polymeric membrane having a ligand-modified surface, the ligand-modified surface having a hydrogen bond-acceptor group-containing ligand, a hydrogen bond-donor group-containing ligand, or both of these; methods of making the ligand-modified porous membrane; and method of using the ligand-modified porous membrane to filter a photoresist solution and remove unwanted polymer molecules from the photoresist solution.

A retro-reflective sheet having an optical interference layer according to an embodiment of the present invention comprises: glass beads applied to a diffusion film of a polyethylene film (PE film) and a polyethylene terephthalate film (PET film); an optical interference layer deposited on the glass beads; a color layer coated on the optical interference layer; and a backing substrate attached to the color layer by an adhesive resin layer, wherein the optical interference layer may be composed of an optical interference thin film layer with ZnS deposited thereon.

The utility model discloses a kind of food packaging boxes with reinforcing structure, belong to food packaging box technical field, its technical scheme main points include box body and top cover, the rear side of top cover and the top of box body are integrally formed, the chamfer of box body inboard is fixedly connected with corner block, four corner blocks are bonded with soft strip, the top of soft strip is equipped with foam mesh cage, with certain gap between box body and foam mesh cage, so it is not easy to cause impact to food in the deformation range of box body, the space formed by foam board and foam mesh cage also has good damping buffering effect, simultaneously setting polyethylene film can not affect foam board deformation and can not cause oppression to food on the basis, can avoid that food falls into between box body and top cover by foam board inboard slotting, leading to difficult to clean in later period, desiccant bag also can also auxiliary keep box body inside dry, avoid that food is affected quality by damp.

This invention relates to the field of medical dressing technology, and discloses a medical dressing based on a liquid metal composite nanoclay. The dressing core material is prepared by ultrasonic mixing of gallium-based liquid metal and halloysite nanoparticles as core functional components. The core material is uniformly coated onto the surface of a double-sided coated fabric, with the outermost layer of the fabric covered by a breathable polyethylene (PE) film. By adjusting the ratio of gallium-based liquid metal to halloysite nanoparticles, the hardness, softness, and other physical properties of the dressing can be adjusted to suit different types of wounds. This invention organically combines liquid metal and nanoclay, possessing the performance advantages of both. It exhibits excellent antibacterial properties, biocompatibility, and environmental stability, creating a sterile and moist microenvironment for wound healing, promoting wound healing. Furthermore, the preparation process is simple, the structure is convenient, and the core material is recyclable, effectively reducing medical costs and showing promising application prospects in clinical wound care.

The application relates to a tear-resistant polyethylene film and a preparation method and application thereof, and belongs to the technical field of polyolefin materials. The tear-resistant polyethylene film comprises the following raw materials: high-density polyethylene, functionalized masterbatch and antioxidant A, the functionalized masterbatch is prepared by uniformly mixing polybutylene terephthalate, ethylene-1-octene copolymer grafted maleic anhydride, epoxy soybean oil, epoxy soybean oil coated talc powder, a catalyst and antioxidant B, and after a premix is obtained, a double-screw extruder is used for full-process vacuum exhaust, and extrusion granulation is carried out. The application effectively dissipates impact through the construction of a continuous transition "PBT-ESO flexible hinge-POE buffer layer" gradient interface, simultaneously uses the epoxy soybean oil coated talc powder, and selects zinc acetylacetonate as the catalyst in the process of preparing the functionalized masterbatch, so that the prepared polyethylene film has excellent tear resistance, impact resistance and high tensile strength and other mechanical properties.

This invention discloses a gold-based gas diffusion electrode and its preparation method for the electrochemical synthesis of hydrogen peroxide, belonging to the field of electrochemical catalysis and synthesis technology. The gold-based gas diffusion electrode comprises a polyethylene film substrate and a gold catalyst layer supported on the substrate surface. The gold catalyst layer is formed in situ by magnetron sputtering and has a crystal structure with gold {200} crystal planes as the main exposed or predominantly oriented crystal planes. By controlling the sputtering deposition conditions, gold layer thickness, and interface structure, a gas diffusion electrode with low gold loading, high oxygen transport efficiency, and high two-electron oxygen reduction selectivity can be obtained. When used for the oxygen reduction electrosynthesis of hydrogen peroxide, this electrode can achieve high hydrogen peroxide selectivity, mass activity, and operational stability with relatively low amounts of noble metals. The preparation method of this invention is simple, requires no complex post-processing or additional binders, and is suitable for the electrochemical synthesis of hydrogen peroxide in acidic, neutral, or alkaline electrolyte systems.

This utility model relates to the field of polyethylene production technology, specifically to an extrusion device for raw materials in polyethylene film bag production. It includes a cylindrical component, a feed frame fixedly installed at the upper end of the cylindrical component, and a discharge pipe fixedly installed at the discharge position of the cylindrical component. It also includes a movable component movably connected to one side of the cylindrical component, the outer end of which extends through the cylindrical component and is fixedly mounted with a fixing plate. Furthermore, it includes a rotating shaft rotatably connected inside the cylindrical component, with a heating ring fixedly installed at the inner end of the shaft. Finally, it includes a conveying roller fixedly installed at the end of the heating ring. Through the movable component and the frustum-shaped heating ring mounted on the rotating shaft, stable heating of the granular raw material can be achieved, improving the hot-melt efficiency. Moreover, the connection between the cavity and the connecting hole allows for dust removal of the raw material during feeding.