236 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.

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 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.

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.

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.

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.

The invention provides a biomimetic enzyme functional composite membrane constructed by microfluidics and application of the biomimetic enzyme functional composite membrane in removal of water pollutants. According to the composite membrane, lipidosome vesicles embedded with laccase molecules are prepared through a microfluidic method, a functional coating is formed by sodium alginate, and the functional coating and a porous PVDF supporting membrane are compounded to form a multi-layer membrane structure. The prepared biomimetic membrane simulates the gradient structure of a biological water channel, achieves the synergistic effect of enzyme catalytic degradation and physical filtration, has high selectivity and high permeation flux, and solves the technical problem that'flux-selectivity 'of a traditional membrane is difficult to consider. The membrane material is derived from natural renewable resources, the preparation process is green and environment-friendly, and the membrane shows efficient purification capacity in the aspect of removing heavy metal ions and organic dye pollutants and has excellent anti-pollution and self-cleaning characteristics.

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.

The invention relates to an optical thin film, in particular to a method for removing Sn pollutants on the surface of a multilayer film based on wetting-stress removal, which comprises the following steps of: firstly depositing a layer of continuous Sn thin film on the multilayer film of which the surface is polluted by Sn, and then depositing a layer of Al2O3 thin film of which the thickness is greater than 100nm to form a layer to be removed; heating treatment is carried out in a vacuum environment, so that the to-be-removed layer has cracks under the action of dewetting-stress, and the binding force between the to-be-removed layer and the multi-layer film is reduced; and polishing the sample, and removing the to-be-removed layer on the surface of the multilayer film. According to the method for removing the Sn pollutants on the surface of the multilayer film, the Sn pollutants on the surface of the multilayer film can be efficiently removed on the premise that the structure of the multilayer film is not obviously affected, and then the optical function of the multilayer film is recovered.

The present disclosure provides a laminate. In an embodiment, the laminate includes (1) a first machine direction oriented multilayer film (1MD0), (2) a second film, and (3) an adhesive layer between the 1MD0 and the second film. The 1MDO includes (a) a skin layer with (i) a skin layer (SL) first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc and (ii) a skin layer (SL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc. The 1MDO includes (b) a first intermediate layer (FIL) in direct contact with the skin layer. The first intermediate layer includes an FIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc. The 1MDO includes (c) a core layer (CL) in direct contact with the first intermediate layer (b). The core layer (c) includes (i) a core layer (CL) first ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc, and (ii) a core layer (CL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc. The 1MD0 includes (d) a second intermediate layer (SIL) in direct contact with the core layer. The second intermediate layer includes an SIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc. The 1MDO includes (e) an interior layer (IL) in direct contact with the second intermediate layer. The interior layer includes (i) an interior layer (IL) first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc, and (ii) an interior layer (IL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc.

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.

Multilayer film made of a polymeric material comprising a polypropylene homopolymer, a polypropylene copolymer and EVOH in an amount of at least 96 wt%, preferably at least 98 wt%, relative to the polymeric material, said multilayer film comprising at least 6 layers: a base layer (BL) / laminate layer (LL) / tie layer 1 (TL1) / core layer (CL) / tie layer 2 (TL2) / sealant layer (SL) wherein all layers do not contain polyethylene terephthalate (PET).

The present invention belongs to the field of biomedical science and technology, and specifically discloses a multilayer dental diaphragm made of TPU material for stress relaxation resistance and a preparation method thereof, comprising a three-layer TPU material diaphragm, wherein the first and third layers are both high-relaxation performance TPU materials, and the second layer is low-flexural modulus TPU material. Through photocuring and crosslinking, chemical bonds are formed between the three diaphragm layers. The high-relaxation performance TPU outer layer provides the correction force required for the diaphragm, and the low-flexural modulus TPU inner layer produces a certain buffering effect to prevent excessive initial correction force from causing discomfort to the patient, taking into account both correction effect and comfort. The three-layer dental diaphragm is prepared with these two materials, and then through photocuring and crosslinking, chemical bonds are formed between the three diaphragm layers to ensure that the multilayer diaphragm retains better relaxation performance while greatly improving the patient's wearing comfort. By changing the content of TMPME in the inner and outer layers, the crosslinking density can be changed, thereby achieving a gradient change in diaphragm performance to meet the different strengths of correction force and relaxation effect required for orthodontics.

The application provides a ternary random copolymer, a preparation method thereof and a multilayer film structure, and belongs to the technical field of heat-seal copolymer resins. The ternary random copolymer has the structure shown in the following formula (I), formula (I), wherein 0 < x < 1, 0 < y < 1, and 0 < x + y < 1; 150 < n < 2000. The ternary random copolymer has a rigid structural unit, so that the ternary random copolymer has good temperature resistance and a high melting temperature, and is beneficial to subsequent application as a heat-seal 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 application discloses a kind of multilayer film materials and preparation method thereof, and the preparation method comprises: two-dimensional material is dispersed in solvent, and two-dimensional material dispersion liquid is prepared;The raw material of each layer film is dispersed in each solvent respectively, and several film material dispersion liquids are prepared;Two-dimensional material dispersion liquid is subjected to suction filtration;When two-dimensional material dispersion liquid is about to be suction filtered, the film material dispersion liquid of the adjacent film layer of two-dimensional material layer is added to the two-dimensional material layer formed, and suction filtration is continued until the film material dispersion liquid of each layer film is suction filtered;After suction filtration is completed, the suction filtration membrane attached with multilayer film is dried and peeled, and multilayer film is prepared.The application can finely control the number of layers and the thickness of each layer film material of film material, and the operation is simple, convenient and fast.