122 results about "Multilayer membrane" patented technology

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.

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 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.

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.

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.

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.

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.

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.

A device includes a porous substrate and a multilayer film. The porous substrate has a pore structure configured to allow hydrogen molecules to diffuse through the porous substrate. The multilayer film is configured to split hydrogen molecules into at least one of hydrogen atoms or protons in response to contacting the hydrogen molecules in the gas stream. The multilayer film is configured to allow passage of hydrogen atoms or protons through the multilayer film while blocking passage of larger compounds than hydrogen molecules that may be present in the gas stream. The hydrogen atoms or protons bind after passing through the multilayer film to reform hydrogen molecules. The multilayer film includes a first metal layer, an intermediate layer, and a second metal layer.

A method for manufacturing a compostable film for sealing a capsule for making beverages involves arranging an outer barrier layer made of a compostable material, the compostable material being paper, or regenerated cellulose, arranging a filtering element, and extruding and casting, directly onto the outer barrier layer, an inner layer, intended to come into contact with the capsule to be sealed and made of a compostable biopolymer with heat-sealing properties so that the filtering element is at least partially incorporated in the compostable biopolymer.

The present invention relates to a multilayer polyethylene film comprising in order at least an outer layer, a core layer and a sealing layer, wherein the sealing layer comprises: i) at least 30.0 wt% of a first multimodal linear low density polyethylene terpolymer relative to the total weight of the sealing layer; and ii) at least 10.0 wt% of a first plastomeric body having a density of 910 kg / m3or less (ISO 1183) relative to the total weight of the sealing layer; wherein the core layer comprises: a) at least 8.0 wt% of a second plastomeric body having a density of 910 kg / m3or less (ISO 1183) relative to the total weight of the core layer, or b) at least 8.0 wt% of a multimodal linear low density polyethylene (LLDPE) binary copolymer relative to the total weight of the sealing layer; and c) a second multimodal polyethylene terpolymer. 3 The present invention relates to a multilayer polyethylene film comprising in order at least an outer layer, a core layer and a sealing layer, wherein the sealing layer comprises: i) at least 30.0 wt% of a first multimodal linear low density polyethylene terpolymer relative to the total weight of the sealing layer; and ii) at least 10.0 wt% of a first plastomeric body having a density of 910 kg / m3or less (ISO 1183) relative to the total weight of the sealing layer; wherein the core layer comprises: a) at least 8.0 wt% of a second plastomeric body having a density of 910 kg / m3or less (ISO 1183) relative to the total weight of the core layer, or b) at least 8.0 wt% of a multimodal linear low density polyethylene (LLDPE) binary copolymer relative to the total weight of the sealing layer; and c) a second multimodal polyethylene terpolymer. 3 ​

The utility model relates to filter membrane preparation equipment technical field, concretely to a kind of multilayer nanofiber filter membrane superposition assembly device, through the cooperative mechanism of layered precision membrane feeding, whole course tension control, multi-section superposition press and low-temperature heating fusion, the automation, high-precision superposition of different function nanofiber membrane is realized, rack is fixed base, and layered rotating groove of front end U type bearing frame is used to load nanofiber membrane roll of different function, at least three groups layered conveying module are vertically arranged along rack height, ensure that multilayer film material is synchronously conveyed to downstream. Guiding roller and lower roller of tension unit form tension adjusting structure, maintain film material tension stable, avoid tearing or wrinkle, first group of superposition platform preliminary press and eliminate interlayer gap, middle heating box provides low-temperature heating to promote interlayer nanofiber physical fusion, second group of superposition platform carries out secondary press, and strengthens interlayer bonding strength.

This invention relates to the field of high-performance fiber and product technology, specifically to a polyethylene release film and its preparation method. The total film thickness is 40-80 μm, and the overall structure is an integrated three-layer continuous film, comprising: a gradient density polyethylene base layer, an in-situ DCP covalently crosslinked interface layer, and a silicone-free perfluorinated passivated release surface layer. The total thickness of the three layers is as follows: gradient density polyethylene base layer 99.7%-99.9%, in-situ DCP covalently crosslinked interface layer 0.015%-0.03%, and the remainder is the silicone-free perfluorinated passivated release surface layer. The in-situ DCP covalently crosslinked interface layer bonds the gradient density polyethylene base layer and the silicone-free perfluorinated passivated release surface layer. This invention solves the problems of weak interlayer bonding and performance imbalance of homogeneous films at the structural level through the structural design of the gradient density polyethylene base layer and the in-situ DCP covalently crosslinked interface layer.

A plastic optical product 1 includes optical multilayer films 6 formed via intermediate films 4 on both surfaces of a plastic base 2. In each optical multilayer film 6, SiO2 layers 10 made of SiO2 and ZrO2 layers 12 made of ZrO2 alternate such that a total number of the SiO2 layers 10 and the ZrO2 layers 12 is eight and a layer closest to the base 2 is the ZrO2 layer. The optical multilayer film 6 has a physical film thickness of not less than 480 nm and not greater than 530 nm. A total of physical film thicknesses of all the SiO2 layers 10 is not less than 350 nm and not greater than 440 nm. The ZrO2 layer 12 that is a first layer L1 closest to the base 2 has a physical film thickness of not less than 5 nm and not greater than 12 nm.

The multilayer film (100) may include a first skin layer (102), a second skin layer (104), and a core (106) between the first skin layer (104) and the second skin layer (102). The first skin layer (102) and / or the second skin layer (104) may independently comprise a linear low density polyethylene (LLDPE) resin. The core 106 may include a first core layer (108), a second core layer (110), and a third core layer (112). The first core layer (108) and the third core layer (112) may independently comprise high density polyethylene (HDPE), LLDPE, or a combination of these. The second core layer (110) may include an ethylene-based copolymer selected from the group consisting of an ethylene / propylene copolymer, an ethylene / butyl acrylate copolymer, an ethylene / ethyl acrylate copolymer, an ethylene / methyl acrylate copolymer, and an ethylene / vinyl acetate copolymer. The thickness of the second core layer (110) may be less than 15% of the thickness of the multilayer film (100). At least one of the core layers (108, 110, 112) may comprise HDPE.

The application discloses a preparation method of a ceramic iron-nickel alloy double-biomimetic multilayer film. The preparation steps comprise the following steps: carrying out carburizing treatment on carbon steel; etching a honeycomb framework on the surface after the carburizing treatment; alternately depositing a metal layer with carburide forming capability, a nickel layer, a metal layer with carburide forming capability and an iron layer along the side wall and the bottom surface of the honeycomb framework as a period of a three-dimensional multilayer film, until the three-dimensional multilayer film is flush with the surface of the substrate; and carrying out heat treatment to make carbon, iron and nickel elements diffuse. Finally, the surface structure is composed of the honeycomb structure framework and the annual ring structure ceramic / iron-nickel alloy multilayer film. The multilayer film has a periodic structure and a gradient ceramic grain size, the interlayer interface is irregular and zigzag and has metallurgical bonding. The ceramic / iron-nickel alloy double-biomimetic structure gradient multilayer film prepared by the application significantly improves the strength and toughness of the film layer and the interfacial bonding force, and further improves the comprehensive performance.

Embodiments of the present invention relate to polyethylene-based compositions, monolayer films, multilayer films, laminates, and articles. In one aspect, a polyethylene-based composition comprises (A) at least 95% by weight, based on the total weight of the polyethylene-based composition, of one or more polyethylenes; and (B) 250 to 15,000 ppm, based on the total weight of the polyethylene-based composition, of a polydimethylsiloxane having a number average molecular weight (Mn) of 1,000 to 40,000 g / mol, wherein the polyethylene-based composition has a density of 0.865 to 0.915 g / cm3 and a melt index (I2) of 0.5 to 25 g / 10 minutes.

This utility model relates to the field of food testing technology and discloses a multi-layer membrane negative pressure rapid filtration device for food testing samples, including a first filter cylinder and a second filter cylinder. The second filter cylinder has a multi-layer membrane body arranged inside, and the output end of the drive motor is connected to a stirring shaft. This utility model fixes a support plate on both sides of the inner wall of the first filter cylinder, and a second positioning column is fixed on the top of the support plate. A second filter plate is assembled above the support plate. Therefore, during operation, the material first passes through multiple layers of filtration within the multi-layer membrane body. This process can be aided by a negative pressure pump to provide a negative pressure environment, thus forming a multi-layer membrane negative pressure filtration. The first and second filter cylinders can be connected and assembled on both sides using connecting plates. During assembly, fixing bolts are used to connect and fix the first filter cylinder to the connecting plate and the connecting plate to the second filter cylinder, thereby improving the connection and assembly capability during operation.

This invention discloses a DNA nanochannel-engineered nanofluidic synapse, its preparation method, and its application. The synapse comprises a solid nanochannel substrate, a phospholipid multilayer membrane, and a programmable DNA nanochannel. The phospholipid multilayer membrane is grown in situ on the surface of the solid nanochannel substrate. The DNA nanochannel is embedded in the phospholipid multilayer membrane through hydrophobic interactions between the hydrophobic tails of cholesterol and phospholipids. A locker specifically for capturing neurotransmitters is disposed at the top of the programmable DNA nanochannel. This invention's DNA nanochannel-engineered nanofluidic synapse, by introducing an AAO substrate (providing mechanical stability and integration) and a phospholipid multilayer membrane (providing a biomimetic environment, interference resistance, and signal amplification), elevates pure DNA nanochannel gating technology from a "fragile and low-sensitivity" state to a "robust and highly sensitive" engineered device.

Embodiments of the present invention relate to multilayer films, labels, and packaging. In one aspect, a multilayer film having at least one matte surface includes (a) an outer layer comprising (i) 30 wt.% to 99.5 wt.% of a first low density polyethylene having a density of 0.919 g / cm 3 to 0.940 g / cm 3 and a melt index (I2) of 0.3 g / 10 min to 5 g / 10 min, (ii) 0.1 wt.% to 20 wt.% of polymer particles having a core and a shell structure, wherein the core comprises a first polymeric material having a first refractive index and the shell comprises a second polymeric material having a second refractive index different from the first refractive index, and (iii) optionally, up to 50 wt.% of a first polyethylene having a density of 0.925 g / cm 3 to 0.970 g / cm 3 and a melt index (I2) of 0.8 g / 10 min to 10 g / 10 min, each based on the total weight of the outer layer; and (b) a second layer in adhering contact with the outer layer, the second layer comprising (i) 1 wt.% to 80 wt.% of a second low density polyethylene having a density of 0.919 g / cm 3 to 0.940 g / cm 3 and a melt index (I2) of 0.3 g / 10 min to 5 g / 10 min, and (ii) 20 wt.% to 99 wt.% of a second polyethylene having a density of 0.925 g / cm 3 to 0.970 g / cm 3 and a melt index (I2) of 0.8 g / 10 min to 10 g / 10 min, each based on the total weight of the second layer; wherein the outer layer has a glossiness of less than 50% measured by ASTM D2457 at a 45° angle.

Provided are a multilayer film capable of suppressing generation of air bubbles in an adhesive layer and suppressing occurrence of winding misalignment when wound immediately after lamination, a method for producing the multilayer film, and a packaging container using the multilayer film. The multilayer film of the present invention is a multilayer film including a plurality of resin films and one or more adhesive layers, and is characterized that at least one of the adhesive layers is formed of a solventless adhesive; and the solventless adhesive contains a main agent made of a polyester-based resin and a curing agent made of an aliphatic isocyanate, and a viscosity of the solventless adhesive at 80°C is from 650 to 1600 mPa·s.

The invention relates to a high-performance multi-period stacked X-ray broadband multilayer film design method, which comprises the following steps of: determining a material combination and a film pair number of a non-periodic multilayer film according to a target wave band of a broadband multilayer film, and according to the material characteristics, determining the number of film pairs of the non-periodic multilayer film; fixing each layer of a first material of which the film forming quality is easy to change along with the film thickness in the material combination of the aperiodic multi-layer film as a single thickness; according to the target wave band and incident angle requirements of the broadband multilayer film, the thickness of each layer of a second material in the material combination of the aperiodic multilayer film is taken as a variable, the film layer thickness of the second material is optimized through an evaluation function, and an initial broadband multilayer film is obtained; dividing a film layer of the initial broadband multilayer film into a plurality of sections according to the film thickness distribution condition of the initial broadband multilayer film; and fixing the film thickness of the second material in each section of film layer as a single thickness, and optimizing to obtain the multi-period stacked broadband multilayer film. Compared with the prior art, the preparation difficulty of the multilayer film is remarkably reduced while the wide energy spectrum and high efficiency are maintained.

Provided are a multilayer film for a container, a container comprising the multilayer film, a method for manufacturing the container comprising the multilayer film, and a medical container containing a drug solution and containing the drug solution, the multilayer film being capable of suppressing oxidative deterioration of contents by oxygen remaining in the container or the contents and / or oxygen that permeates into the container, and also capable of suppressing oxidative deterioration of the contents by oxygen that remains in the container and / or the oxygen that permeates into the container, the container comprising the multilayer film, the method for manufacturing the container comprising the multilayer film, and the medical container containing the drug solution. As a result, it is possible to suppress adsorption of the contents on the film constituting the container, decrease in drug efficacy and adsorption of flavor substances, increase in the amount of the contents adsorbed on the film during the distillation step, uneven deformation of the film and occurrence of unevenness of the surface, and deformation of the container. A multilayer film for a container comprises: an outer film which is a transparent oxygen barrier film; an intermediate film which is a co-extruded film having an oxygen-absorbing layer; and an inner film which is a co-extruded film having a cyclic polyolefin layer containing a cyclic polyolefin, in which the intermediate film has a symmetrical laminated structure having a surface layer with the oxygen-absorbing layer as a core layer, and the inner film has a symmetrical laminated structure having a surface layer with the cyclic polyolefin layer as a core layer.

The invention discloses an adjustable multilayer membrane dynamic pollution simulation and separation analysis system and method, and the method comprises the following steps: respectively embedding membranes of different materials or apertures into modular membrane bins formed by filter plates and filter frames, and stacking multilayer membrane units according to experimental requirements; rotating the filter frame to a target mode position, locking through a plate frame fixing nut, and linking an adjusting valve to close a central water path or a side water path; low-pressure air is introduced to detect the leakproofness of the first quick-assembly flange, the second quick-assembly flange and the interlayer O-shaped ring; the centrifugal pump is started, and the concentration of inflow pollutants is adjusted through the dosing device; the pumping system is started, so that water flow passes through the multi-layer membrane assembly according to a preset path, and graded interception or multi-membrane cooperative pollution analysis of pollutants is realized according to different working modes; the membrane unit is disassembled, and pollutants on the surface of each layer of membrane are analyzed. The device can simulate the influence of different water qualities on membrane pollution and blockage in a laboratory environment, and solves the problem that a membrane combination mode and a water flow path cannot be flexibly controlled traditionally.

This invention discloses a flexible, bendable composite pipe with spring support for ePTFE membrane winding, its preparation method, and its applications. The composite pipe includes a spring support body; multiple layers of ePTFE expanded polytetrafluoroethylene (ePTFE) membrane wound around the outer surface of the spring support body; the multiple ePTFE membranes are crystalline-linked by a hot-melt sintering process to form fluorocarbon bonds, thus combining the multiple ePTFE membranes with the spring support body to form a composite pipe wall structure. This structure solves the problems of collapse and loosening caused by the softness and deformation of single-layer ePTFE membranes, endowing the pipe with good tensile strength, flexible bending characteristics, and air permeability / filtration functions due to the microporous structure of ePTFE. The pipe is resistant to chemical corrosion and has a wide temperature adaptability range, making it suitable for industrial fluid transport and filtration systems requiring flexible conveying, pressure balance, or the infiltration / emission of specific gases. The preparation method mainly includes winding and hot-melt sintering processes within a specific temperature range.