290 results about "Multilayer membrane" patented technology

The invention relates to the technical field of packaging film production, and discloses a production process of a three-layer co-extrusion FFS (fringe field switching) heavy coating film, which comprises the following steps: S1, selecting proper raw materials including an outer layer material, an inner layer material and a middle layer material; s2, drying the selected raw materials respectively to ensure that the moisture content is lower than 0.1%; s3, uniformly mixing different materials and additives through premixing equipment; s4, feeding the three materials into co-extrusion equipment, simultaneously extruding melt materials of different layers through a co-extrusion machine, and forming a multi-layer film structure through a die head; and S5, controlling the temperature and the flow speed at the die head to ensure the fluidity and the pressure distribution uniformity of the material melt of each layer. Through a dynamic stretching device, a pressure feedback control system, an optimized die head design and an intelligent control system, uniform film bubble expansion, accurate film thickness control and improvement of film quality stability are realized, the production efficiency and automation are improved, and the consistency and overall performance of film quality are remarkably improved.

The invention relates to a preparation method of a multi-porosity gradient multi-layer dry method thick electrode, which comprises the following steps of: stirring and mixing raw materials under the condition that the temperature is less than or equal to 18 DEG C to obtain a premix; quickly shearing the premix and raising the temperature to be less than or equal to 120 DEG C to obtain fiberized powder; the powder is subjected to one-time double-roller hot pressing to form a film continuously, the formed film continuously passes through double rollers and hot pressing to be thinned and then is rolled, multiple layers of films are obtained, and each layer of film has different porosity; the multiple layers of diaphragms with different porosities and the current collector are subjected to continuous double-sided lamination through double-roller hot pressing; the temperature of the double rollers is controlled to be smaller than or equal to 180 DEG C, the pressure of the double rollers is controlled to be 10-200 T, the laminating speed is controlled to be 1-10 m / min, the gap of the double rollers is controlled to be smaller than or equal to 1000 microns, and the multi-layer dry-method thick electrode which is composed of multiple layers of membranes is obtained after rolling, the compaction density of each layer of membrane is different, and the material proportion of each layer of membrane is the same; the method has the advantages that only the compaction density of the pole piece needs to be regulated and controlled, the material ratio does not need to be adjusted, and the interface property is more stable after multiple times of film forming.

The present disclosure relates to a biodegradable multilayer film comprising stacked on each other in the following order: a) a first outer layer comprising a first polymer selected from the group consisting of poly (butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS), poly (butylene succinate-co-adipate) (PBSA), and mixtures thereof; b) a core layer comprising a blend of thermoplastic starch (TPS) and polybutylene adipate terephthalate (PBAT); c) a second outer layer comprising a second polymer selected from the group consisting of poly (butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS), poly (butylene succinate-co-adipate) (PBSA), and mixtures thereof. The present disclosure also relates to a disposable bag, a bioreactor and a container suitable for mixing, packaging, storing or transporting biopharmaceutical substances, wherein the disposable bag, bioreactor and container comprise the biodegradable multilayer film.

The invention provides a preparation method of a multi-layer co-extrusion composite insulating material, and relates to the technical field of battery material manufacturing. The preparation method comprises the following steps: respectively melting and mixing an upper layer component, a middle layer component and a lower layer component which are respectively prepared, co-extruding, casting and forming to obtain a multi-layer membrane; performing two-way stretching on the multiple layers of membranes to obtain a composite insulating material; wherein raw materials adopted by the middle layer component comprise isotactic polypropylene and graphene in-situ polymerized polystyrene, raw materials adopted by the upper layer component comprise isotactic polypropylene and norbornene dianhydride, and raw materials adopted by the lower layer component comprise isotactic polypropylene and norbornene dianhydride. According to the obtained composite insulating material, good bonding strength exists between the layers and between the composite insulating material and the metal layer, and the composite insulating material is especially suitable for being used as a base film of a composite current collector.

The invention belongs to the technical field of radioactive wastewater treatment and uranium extraction from seawater, and discloses a high-flux cellulose immobilized tannin membrane adsorption material as well as a preparation method and application thereof. The membrane adsorption material comprises an aldehyde cellulose acetate microfiltration membrane and waxberry tannin which is cured on the microfiltration membrane through gradient cross-linking. The membrane adsorption material provided by the invention keeps a reticular porous structure of a cellulose microporous filter membrane and has the characteristics of high flux and rapid mass transfer, the pure water flux of a single-layer membrane can reach 300 L / (m.h), the treatment capacity of a multi-layer membrane is remarkably increased, large-flow treatment can be realized, and the efficiency of extracting uranium from seawater or uranium-containing wastewater is remarkably improved.

A formulation and method for producing a multilayer film and a coated multilayer film comprising a barrier layer including a polar polymer resin, such as EVOH, as described.

The invention relates to the technical field of waterproof coiled materials, and provides an anti-aging film for a waterproof coiled material and a preparation method thereof.The anti-aging film is formed by crossing and compounding multiple layers of films, and the multiple layers of films sequentially comprise an inner layer film, a middle layer film and an outer layer film from top to bottom; wherein the outer-layer film comprises the following components in parts by weight: 80-90 parts of high-density polyethylene, 6-8 parts of black masterbatch, 10-15 parts of hydroxyl nicotinic acid compound modified carbon black, 1-2 parts of an antioxidant and 2-4 parts of a plasticizer, the modified carbon black is hydroxyl nicotinic acid compound modified carbon black, and the inner-layer film and the middle-layer film are polymer film layers. According to the technical scheme, the problem that in the prior art, the aging resistance of the film for the waterproof roll is poor is solved.

The invention relates to the field of hydrogen sensors, in particular to a palladium-based multilayer film hydrogen sensor based on an abnormal Hall effect as well as a preparation method and application of the palladium-based multilayer film hydrogen sensor. The palladium-based multilayer film hydrogen sensor based on the abnormal Hall effect comprises a substrate, a film structure with a Hall rod pattern and an electrode layer which are sequentially arranged from bottom to top, the thin film structure with the Hall rod pattern sequentially comprises a Pd single-layer thin film and a (Co / Pd) X multi-layer thin film from bottom to top, wherein X represents the cycle number of the (Co / Pd) X multi-layer thin film; x is an integer from 1 to 10; in each period of the (Co / Pd) X multilayer film, an arrangement mode that the Co layer is arranged on the lower portion and the Pd layer is arranged on the upper portion is adopted. The palladium-based multilayer film hydrogen sensor based on the abnormal Hall effect has the advantages of being obvious in hydrogen detection current signal, high in environmental gas interference resistance and controllable in hydrogen detection concentration.

An optical filter includes a first dielectric multilayer film, a resin film, a phosphate glass, and a second dielectric multilayer film. The second dielectric multilayer film includes at least one H2 layer satisfying a refractive index of 1.8 or more and 2.5 or less and a QWOT of 1.1 or more and 3.5 or less, when a layer closest to the phosphate glass in the H2 layers is defined as a first H2 layer, the second dielectric multilayer film comprises a first M2 layer comprising a single layer satisfying a QWOT of 1.2 or more and 1.8 or less or a plurality of layers satisfying a total QWOT of 1.2 or more and 1.8 or less between the first H2 layer and the phosphate glass, and the optical filter satisfies all of the spectral characteristics (i-1) to (i-4).

Airsoles or bladders for articles of footwear comprising multi-layered films are provided herein. In one aspect, the airsoles or bladders comprise a first sheet and a second sheet, wherein a first side of the first sheet faces a second side of the second sheet, wherein the first sheet and the second sheet are bonded together to form an internal cavity in a space between the first side of the first sheet and the second side of the second sheet, forming a bladder capable of retaining a gas in the internal cavity at a pressure above atmospheric pressure, at atmospheric pressure, or below atmospheric pressure; and wherein each of the first sheet and the second sheet comprise a multi-layered film comprising: a core region comprising at least 20 gas barrier layers and a plurality of elastomeric layers, wherein the gas-barrier layers alternate with the elastomeric layers.

A diaphragm for a microspeaker has an organic polymer film layer in direct contact with one or both skin layers. The one or two skin layers independently include a block copolymer having a hard segment and a soft segment, wherein a portion of the hard segment is included in a crystalline physically crosslinked domain. The organic polymer film layer is not sticky at 25 DEG C. A method of making the diaphragm is also described. The method includes co-extruding the block copolymer and an organic polymer to provide a multilayer film comprising the one or two skin layers and the organic polymer film layer in direct contact with the one or two skin layers. A microspeaker including the diaphragm is also described.

The present invention provides: a vapor-deposited multilayer film which has high oxygen barrier properties and high water vapor barrier properties, and has sufficient oxygen barrier properties even after a bending treatment; and the like. Provided is a vapor-deposited multilayer film comprising: a multilayer film in which a layer (A), as the outermost layer, a layer (B), and a layer (C) are stacked in this order; and a vapor-deposited inorganic layer (I) stacked on the exposed surface side of the layer (A). The vapor-deposited inorganic layer (I) is a vapor-deposited metal layer that is mainly composed of aluminum, or a vapor-deposited inorganic oxide layer that is mainly composed of alumina or silica. The layer (A) contains, as a main component, an ethylene-vinyl alcohol copolymer (a) that has an ethylene unit content of 36-60 mol%; the layer (B) contains, as a main component, an ethylene-vinyl alcohol copolymer (b) that has an ethylene unit content of 20-35 mol%; and the layer (C) contains a polyethylene or a polypropylene as a main component. The average thickness of the multilayer film is 300 µm or less.

The invention relates to a preparation process of a metal ceramic bionic multilayer film, and belongs to the technical field of metal ceramic films, and the metal ceramic bionic multilayer film comprises a porous metal matrix, a gradient transition layer, a bionic lamination layer and a nanopore separation layer. According to the method, the failure problem of a traditional metal ceramic film under the extreme working condition is systematically solved through the multi-level innovative design, firstly, in the aspects of thermal stress elimination and interface strengthening, a five-layer gradient transition layer structure with the ceramic content changing is adopted, and the plasma spraying-laser remelting synchronous machining technology is combined; the thermal expansion coefficient of the metal matrix and the ceramic layer is continuously and gradually changed, so that the interface thermal stress is effectively reduced, the bonding strength is improved, the problems of cracking and layering under the high-temperature working condition are effectively solved, the service life is effectively prolonged, the structure is strengthened and toughened, and the bionic lamination design simulates the'brick-mud 'structure of a shell pearl layer; the nano-scale metal layer absorbs crack energy, and the ceramic layer provides rigid support, so that the fracture toughness is effectively improved.

The invention provides a ternary random copolymer, a preparation method thereof and a multilayer film structure, and belongs to the technical field of heat-sealing copolymer resin. The ternary random copolymer has a structure as shown in the following formula (I): # imgabs0 # formula (I), x is more than 0 and less than 1, y is more than 0 and less than 1, and x + y is more than 0 and less than 1; n is more than 150 and less than 2000. The ternary random copolymer disclosed by the invention has a rigid structural unit, so that the ternary random copolymer has relatively good temperature resistance and relatively high melting temperature and is favorably applied as a heat sealing layer subsequently.

Magnetic particles with a highly reflective protective membrane (300), comprising: a magnetic core (100), a shell (200) formed on the outer surface of the magnetic core (100), having a multi-layer structure and comprising a first shell (210) made of a dielectric material, and a second shell (220) made of metallic material, formed on the outer surface of the first shell (210) and being a multi-layer membrane in which two or more layers (221, 222, 223) of mutually different metallic materials are stacked on top of each other, and a highly reflective protective membrane (300) which is in contact with the second shell (220) and is formed on the outer surface of the shell (200), wherein the highly reflective protective membrane (300) comprises a multi-layer structure comprising a low refractive index membrane (310) formed on the outer surface of the shell (200) and having an optical thickness between 0.15 to 0.35 of the wavelength, and a high refractive index membrane (320) formed on the outer surface of the low refractive index membrane (310) and having an optical thickness between 0.15 to 0.35 of the wavelength, the dielectric material is one or more materials selected from a group comprising titanium dioxide, aluminum oxide, calcium carbonate, zirconium oxide, magnesium fluoride, zinc oxide and zinc sulfide, the metallic material is one or more materials selected from a group comprising copper, nickel, gold, platinum, silver, aluminum and chromium, the low refractive index membrane (310) consists of one or more materials selected from a group comprising silicon dioxide, magnesium fluoride, polystyrene, polymethyl methacrylate, polystyrene-co-butadiene, vanadium pentoxide, cadmium oxide, polyisobutylene and polyethylene, and the high refractive index membrane (320) consists of one or more materials selected from a group comprising titanium dioxide, aluminum oxide, zinc oxide, zirconium oxide and chromium oxide.

Polypropylene-based multilayer film, which is biaxially oriented, process for manufacturing biaxially oriented multilayer film and its use in flexible packaging.

The present disclosure relates to a multilayer film, which successively has: a first outer layer containing a propylene homopolymer (A) and a propylene-ethylene random copolymer (B) as a heat-seal layer; an inner layer containing a propylene-ethylene block copolymer (C) and an ethylene-propylene copolymer elastomer (D); and a second outer layer containing the propylene homopolymer (A) and the propylene-ethylene random copolymer (B), wherein at least any one of the first outer layer, the inner layer, and the second outer layer further contains a polyphenol compound.

The present invention relates to a multilayer film comprising: an inner layer system comprising a first surface and a second surface; a first skin layer adhered to the inner layer system at the first surface of the inner layer system; and a second skin layer adhered to the inner layer system at the second surface of the inner layer system; wherein the inner layer system consists of a polymer formulation (A), wherein the polymer formulation (A) comprises: > 60.0 and < 90.0 wt% of a first ethylene-based polymer which is a linear low density polyethylene A (LLDPE A); and > 10.0 and < 40.0 wt% of a high density polyethylene (HDPE) having a density > 940 and < 970 kg / m 3 , preferably > 955 and < 970 kg / m 3 ; measured according to ASTM D792 (2008); and the first and / or second skin layer is a sealing layer comprising a second ethylene-based polymer which is a linear low density polyethylene B (LLDPE B) comprising polymerized moieties derived from ethylene and 1-octene or 1-hexene having a density > 890 and < 915 kg / m 3 , preferably > 900 and < 915 kg / m 3 , measured according to ASTM D792 (2008); preferably, wherein the sealing layer comprises > 70.0 wt% of the second ethylene-based polymer, or wherein the sealing layer consists of the second ethylene-based polymer; wherein the multilayer film is a biaxially oriented film, wherein the biaxial orientation is introduced in solid state. This film allows the production of a sealed package having a sufficiently high seal strength at reduced sealing temperature (also referred to as seal initiation temperature) which at the same time has improved tensile properties, such as an improved tensile modulus in machine and transverse direction and an improved tensile strength in machine and transverse direction, which has proven.

The present invention relates to a multilayer finished shrink film comprising at least two layers, for example at least three layers, where at least one layer (A) comprises at least (A1) a specific multimodal copolymer of ethylene and (A2) LDPE and at least one layer (B) comprises at least (B1) recycled LDPE and (B2) a specific copolymer of ethylene. The invention further relates to a method for producing the multilayer film and to the use of the multilayer film in the field of secondary packaging.

This invention provides a hydrocarbon gas separation system, comprising a double-layered tube assembly and a negative pressure system. The double-layered tube assembly includes a medium delivery inner tube, a multi-layered membrane assembly, an annular interlayer gap, and a pressure-bearing protection section outer tube. The double-layered tube assembly is sealed at both ends. The multi-layered membrane assembly includes a retention layer, an isolation layer, and a selectively permeable membrane layer. The medium delivery inner tube is nested inside the pressure-bearing protection section outer tube and encloses the multi-layered membrane assembly. The negative pressure system is connected to the double-layered tube assembly. After the mixed gas is processed by the multi-layered membrane assembly in the medium delivery inner tube, sulfur dioxide is retained. The hydrocarbon gas enters the annular interlayer gap for extraction, and the retained sulfur dioxide is released back into the gas. Finally, the gas enters a sulfur dioxide detection instrument and is detected using ultraviolet fluorescence, making the data more consistent with the actual value and providing a scientific basis for relevant decision-making.

To provide a laminate capable of suppressing occurrence of a crack in a dielectric multilayer film due to temperature changes, while also suppressing occurrence of an appearance defect.SOLUTION: A laminate 11 comprises a synthetic resin substrate 12, an acrylic polymer film 13 laminated on a back surface of the substrate 12, and a dielectric multilayer film 14 laminated on the acrylic polymer film 13.SELECTED DRAWING: Figure 1

This document discloses feminine hygiene products and multilayer membrane structures. According to one or more embodiments disclosed herein, a feminine hygiene product may include a feminine sanitary pad comprising an absorbent body, an adhesive layer located on at least one surface of the absorbent body, and a pouch package in contact with the adhesive layer of the feminine sanitary pad. The pouch package may include a release layer in direct contact with the adhesive layer. The release layer may comprise a polymer composition comprising low-density polyethylene covalently bonded to polydimethylsiloxane.

An apparatus includes a porous substrate and a multi-layer membrane. The porous substrate has a pore structure configured to allow diffusion of hydrogen molecules through the porous substrate. The multi-layer membrane is configured to, in response to contacting a hydrogen molecule present in the gas stream, split the hydrogen molecule into at least one of hydrogen atoms or protons. The multi-layer membrane is configured to allow passage of the hydrogen atoms or protons through the multi-layer membrane while blocking passage of compounds that may be present in the gas stream that are larger than hydrogen molecules. The hydrogen atoms or protons, after passing through the multi-layer membrane, combine to reform the hydrogen molecule. The multi-layer membrane includes a first metallic layer, an intermediate layer, and a second metallic layer.

Polypropylene-based multilayer film, which is biaxially oriented, a process for manufacturing the biaxially oriented multilayer film and its use in flexible packaging.

A multilayer film (8) for applying a label (4) to a fabric support (2) by hot pressing includes a lower layer (8a), a barrier layer (8b) and an upper layer (8c). The lower layer (8a) is substantially made of copolyamide, the barrier layer (8b) is substantially made of EVOH, and the upper layer (8c) is substantially made of copolyamide. The film is particularly effective for limiting the migration of pigments from the fabric to the label.

The present invention relates to a hydrophobic polyelectrolyte multilayer (PEM) membranes comprised of a polyelectrolyte layer comprised of one or more bilayer(s) of a polycation and a polyanion, preferably an nanofiltration PEM membrane. The present invention further relates to a method for providing an asymmetrical PEM membrane, or the use of the PEM membranes for the purification, decontamination or cleanup of water, including drinking water.

The present application discloses a cell slitting method and a slitting device. The cell slitting method includes: controlling a pressing plate to tightly press a lamination unit on a cell support table, and controlling the slitting device to slit multiple layers of membranes of the lamination unit according to a pre-set slitting line to obtain m×n independent cell bodies. With respect to the existing slitting device using the mode of cutting off a single cell single-layer tail membrane, according to the present application, the slitting device slits the lamination unit according to a pre-set slitting line such that m×n independent cell bodies can be obtained by simultaneously cutting off multiple layers of membranes, which greatly improves the slitting efficiency and improves the production efficiency of cells.

The multilayer film according to an embodiment is of high applicability as a protective film and comprises: a first layer having one surface and other surface; and a second layer disposed on one surface of the first layer. The Shore D hardness measured on the surface of the second layer is 60 or higher, and the flexural modulus is 1300 MPa or lower. The multilayer film according to an embodiment is easily elongated on curved or bent surfaces, has excellent workability, superior impact absorption functionality, and excellent surface durability.

Disclosed in the present invention are a multifunctional film, a preparation method therefor and a use thereof, and a light-transmitting panel. The multifunctional film comprises a multilayer film and a hydrophobic film layer which are connected in an overlapping manner, the multilayer film comprises a plurality of high refractive index film layers and a plurality of low refractive index film layers, and the plurality of high refractive index film layers and the plurality of low refractive index film layers are alternately and overlappingly arranged in sequence, wherein the side of the multilayer film connected to the hydrophobic film layer is the high refractive index film layer, and wherein the hydrophobic film layer comprises element Si, element C, and element O. The multifunctional film of the present invention can achieve multiple effects of surface hydrophobicity, anti-aging, abrasion resistance, anti-reflection, and the like for a product.