91 results about "Gas barrier" patented technology

The present application relates to the technical field of high polymer composite material, and particularly discloses a liquid nitrogen resistant ultra-low temperature thermoplastic composite film and a preparation method thereof. The film is prepared from the following raw materials: 50-70 parts of thermoplastic polyurethane elastomer, 15-30 parts of polycaprolactone, 2-12 parts of composite reinforcing filler, 2-5 parts of compatibilizer, 1-3 parts of ultra-low temperature toughening agent, and 0.5-1 part of antioxidant. The composite reinforcing filler comprises nanocellulose crystals. The present application also discloses a preparation method of the composite film, which comprises the steps of drying the raw materials, premixing, melt blending and extruding, casting film forming, and annealing treatment. The film has the following advantages: 1) through the optimization design of the thermoplastic polyurethane elastomer, PCL and the composite reinforcing filler, the composite film has excellent flexibility and mechanical strength at the temperature of liquid nitrogen; 2) through the synergistic effect of the composite reinforcing filler, a new gas barrier mechanism is constructed, and the oxygen permeation rate is reduced by more than 80%; and 3) the preparation method is simple and suitable for industrialized mass production.

To provide as a modified ethylene-vinyl alcohol copolymer achieving both forming processability and gas barrier properties under high humidity, the modified ethylene-vinyl alcohol copolymer having a content of an ethylene structural unit of from 20 to 60 mol %, and having a structural unit (1) described below:wherein in the structural unit (1), R1 is an alkyl group having from one to three carbons; and X is an alkylene group having from one to five carbons.

The application belongs to the field of high polymer materials, and discloses a volatile-preventing and string-preventing high-barrier butyl rubber septum material and a preparation method thereof. The material comprises, by weight, butyl rubber 90-110 parts, modified sheet layer filler 5-12 parts, silane coupling agent containing dynamic bond 2-5 parts, polyisobutylene core-fluorine-containing hydrophobic shell core-shell microsphere 1-3 parts, vulcanizing agent 1.5-3 parts, vulcanization accelerator 0.8-2 parts, and activator 3-5 parts. By constructing a triple synergistic structure of "sheet layer directional barrier-dynamic interface plugging-matrix hydrophobic network interception", the penetration and stringing of volatile organic components in the sealing system are effectively inhibited. The preparation method comprises the steps of sheet layer filler modification, rubber matrix mixing, dynamic vulcanization and post-molding vulcanization, and has high controllability. The prepared material has excellent gas barrier property, puncture resistance and low-temperature elasticity, and is suitable for chromatographic sample bottle sealing systems.

This invention proposes a PBAT / starch-wood vinegar composite film, its preparation method, and its application, belonging to the field of food preservation materials technology. This invention successfully prepared PBAT / starch films with different RWV doping levels using a one-pot melt blending method. This method helps avoid the loss and oxidation of phenolic substances during film processing. During preparation, RWV is initially distributed in the starch phase. With the addition of RWV, the gas barrier properties of the film are enhanced, and it exhibits good release performance in various food simulants. Furthermore, the film of this invention also exhibits excellent antioxidant and antibacterial properties, as well as excellent fruit preservation capabilities. Therefore, the RWV-doped PBAT / starch-RWV composite film of this invention is a food packaging material with good antioxidant and antibacterial properties, meeting the preservation needs of most types of food.

This invention relates to a bag-film laminate comprising a base layer, a gas barrier layer, and a sealant layer sequentially laminated together, wherein the amount of lubricant present on the surface of the sealant layer is 5 mg / m³. 2 Up to 25 mg / m 2 The surface roughness (Ra) of the sealant layer is 0.1 μm to 0.5 μm. The amount of lubricant is obtained by cutting the bag-film assembly into 100 mm × 100 mm sections in the MD direction and TD direction, dropping 5 ml of chloroform onto the surface of the sealant layer of the bag-film assembly and letting it stand for 1 minute to prepare a lubricant extraction solution, and then using gas chromatography to measure the amount of lubricant contained in the lubricant extraction solution.

The application provides a nanofiber membrane for CO2 reduction and a preparation method and application thereof, and belongs to the field of electrocatalytic reduction of CO2. The nanofiber membrane has a porous structure, the average pore diameter of the nanofiber membrane is 1.8-2.5 mu m, the porosity is 42%-50%, and the thickness of the nanofiber membrane is 20-60 mu m. The nanofiber membrane is a three-dimensional network structure built by a plurality of extremely fine fibers and full of nanoscale pores, and can significantly improve the ethylene Faraday efficiency and product selectivity in the process of electro-reduction of CO2. The application further provides a preparation method of the nanofiber membrane, the porous nanofiber membrane is obtained by using natural cellulose, by a mechanical dissociation method and by optimizing the membrane thickness and the interface microenvironment, and has good ion conductivity and gas barrier capacity, and the ethylene Faraday efficiency of the nanofiber membrane is more than 70% at 700 mA cm ‑2 , which is more than 10% higher than that of a traditional anion exchange membrane system.

A gas barrier film includes a base material containing a polyethylene as a main resin component and an inorganic oxide layer formed on a first surface side of the base material. The birefringence ΔN of the first surface calculated based on measurement by a parallel Nicol rotation method is 0 or more and 0.007 or less, and the proportion of the polyethylene in the entire gas barrier film is 90 mass % or more.

The gas barrier properties of a laminate having a barrier substrate with a vapor-deposited film formed on a stretched polypropylene film and a sealant layer are improved. [Solution] A barrier laminate comprising a first substrate, a second substrate, and a sealant layer in this order in the thickness direction, wherein either the first substrate or the second substrate is a barrier substrate comprising a polypropylene resin layer and a vapor-deposited film, the other of the first substrate or the second substrate is a polypropylene resin substrate, the polypropylene resin layer is a stretched layer, the vapor-deposited film is composed of an inorganic oxide, and the polypropylene resin substrate is a stretched substrate.

The present invention provides a barrier substrate having a gas barrier layer formed on a stretched polypropylene substrate, which exhibits an excellent balance between gas barrier properties and slipperiness. [Solution] A barrier substrate comprising a polypropylene substrate having a first surface layer and a second surface layer, and a gas barrier layer provided on the first surface layer, wherein the polypropylene substrate is a stretched substrate, the first surface layer contains first particles, the average particle diameter of the first particles is 0.5 μm or more and 3.5 μm or less, and the content of the first particles in the first surface layer is 50 ppm or more and 1,800 ppm or less, based on the mass of the first surface layer.

An electrochromic element in which a decrease in responsiveness is minimized by making a side of the electrochromic element have gas barrier properties, and a lens for spectacles, the electrochromic element including a pair of electrode layers and an electrochromic layer arranged between the electrode layers, wherein a barrier layer surrounding the electrochromic layer is provided.

Provided is a gas barrier laminate that is simple to produce and has excellent water vapor barrier properties and gas barrier properties. Also provided are a gas barrier laminate further excellent in recyclability and heat sealing properties, and a method for producing it. The gas barrier laminate has a water vapor barrier layer and a gas barrier layer in that order on at least one surface of a paper support, wherein the water vapor barrier layer contains a layered inorganic compound, a cationic resin and an anionic binder, the aspect ratio of the layered inorganic compound is 50 or more, the thickness of the layered inorganic compound is 200 nm or less, the content of the layered inorganic compound is 0.1 to 800 parts by mass relative to 100 parts by mass of the anionic binder, and the gas barrier layer contains a water-soluble polymer. The invention is also a method for producing the gas barrier material by coating.

Provided are a gas barrier film and manufacturing methods for making the gas barrier film. The gas barrier film includes a gas barrier layer containing silicon and oxygen as main components. The gas barrier layer has a region in the thickness direction containing silicon, oxygen, and nitrogen. The region has an element ratio of nitrogen of 5 at % or greater and a thickness of 30 nm or greater.

To provide gas barrier laminates, packaging films, packaging containers, and packaging products that can improve oxygen barrier properties after abuse. [Solution] A gas barrier laminate comprising, in this order, a base layer containing a thermoplastic resin, a metal oxide layer, and a gas barrier coating layer, wherein the ratio of silicon atoms to carbon atoms (Si / C) measured by X-ray photoelectron spectroscopy on the surface of the gas barrier coating layer is greater than 0 and less than 0.50.

The application discloses a degradable antibacterial bio-based composite film material and a preparation method thereof, and relates to the technical field of degradable materials.The composite film material is prepared from PPCP, PBAT and PHBV as ternary substrates, modified bamboo powder, modified montmorillonite, bacterial cellulose and functional additives through drying and mixing, plasticizing and granulating, and film blowing forming.The application breaks through the bottleneck that the strength and toughness of traditional materials are difficult to be considered simultaneously through complementary performance of substrates and synergy of filler-substrate interface, and the material has high tensile strength, excellent elongation at break, and integrated antibacterial property, gas barrier property and biodegradability, and does not contain toxic and side components and has excellent biocompatibility.The preparation process of the application is simple and controllable, and the cost is low, and the application is suitable for large-scale production, can be widely applied to the fields of food packaging, medical dressings and the like, and has remarkable practical value.

This invention discloses an environmentally friendly biodegradable plastic packaging material and its preparation method, belonging to the technical field of polymer biodegradable packaging materials. It aims to solve the problems of poor compatibility, low melt strength, and slow degradation of existing polylactic acid (PLA) blends. This invention uses PLA as a matrix, introduces a furanyl dicarboxylic acid-pentanediol-itaconic acid copolyester containing side-chain double bonds as a functionalized flexible component, and adds thiol-modified epoxidized soybean oil as a reactive compatibilizer. Chemical linkages between different polymer chains are achieved through reactive extrusion, constructing a cross-linked network structure of thioether bonds. The resulting packaging material maintains good mechanical properties while exhibiting excellent gas barrier properties and biodegradability.

A laminate has a layer A on at least one side of a base material, in which the layer A contains at least aluminum (Al) and oxygen (O), and when a site corresponding to 5.0 to 25.0%, a site corresponding to 40.0 to 60.0%, and a site corresponding to 75.0 to 95.0%, in terms of length in a depth direction in the layer A, are defined as an X portion, a Y portion, and a Z portion, respectively, there are sites having a different composition ratio O / Al of aluminum (Al) and oxygen (O). There are provided a laminate that exhibits high productivity and less variation in gas barrier properties even with a thin film configuration, and a method for manufacturing a laminate.

A laminate for packaging, the laminate including a base material layer, a gas barrier layer including an inorganic oxide layer, and a sealant layer in this order, in which the base material layer is a biaxially stretched polypropylene-based resin film, the sealant layer is a polypropylene-based resin film, a polypropylene-based resin is contained in an amount of 90 mass% or more based on a total amount of the laminate, and a heat shrinkage rate in an MD direction and a heat shrinkage rate in a TD direction of the laminate after being heated in an oven at 150°C for 15 minutes, as determined by the following Equations (1) and (2), are less than 5.0% and less than 10%, respectively: Heat shrinkage rate (%) in MD direction = (Length in MD direction before heating - Length in MD direction after heating) / Length in MD direction before heating × 100...(1) Heat shrinkage rate (%) in TD direction = (Length in TD direction before heating - Length in TD direction after heating) / Length in TD direction before heating × 100...(2)

The utility model discloses a kind of gas-phase rustproof bags for new energy battery packaging, it is related to new energy battery packaging technical field, including rustproof bag body, the rustproof bag body is multilayer composite structure, and by inside and outside sequentially include inner contact layer, buffer isolation layer, nylon film, VCI gas-phase rustproof layer and anti-static shielding layer, the outermost layer of the rustproof bag body is provided with outer protective layer, the outer protective layer is sequentially provided with PE flexible protective layer, PA support layer and EVOH gas barrier core layer from inside and outside.The outer protective layer designed in the utility model is formed by three-layer co-extrusion process once, combined with the flexibility of PE flexible protective layer, the support of PA support layer and the gas barrier property of EVOH gas barrier core layer, this structure design makes that outer protective layer can resist external friction and scratch, and can also keep the stability of bag inner environment, provides all-round protection for new energy battery.

This invention provides a gas barrier laminate, which is a thinner film and can maintain excellent gas barrier and aroma retention properties even after vacuum packaging in high temperature and high humidity environments. This invention relates to a gas barrier laminate, characterized in that it comprises a plastic substrate (I) and a gas barrier layer (II) laminated on the plastic substrate, wherein the total thickness of the gas barrier laminate is less than 100 μm, (1) the plastic substrate (I) comprises a metal-containing layer, wherein the metal-containing layer comprises at least one of a metal and a metal compound and a resin component, (2) the total content of the metal and the metal compound in the metal-containing layer is 0.1 to 20% by mass, (3) the gas barrier layer (II) contains a polycarboxylic acid, (4) the metal-containing layer and the gas barrier layer are laminated in direct contact, and (5) the composite elastic modulus of the gas barrier layer (II) when the surface of the laminate is subjected to a cooking treatment at 120°C for 30 minutes is measured by nanoindentation method is 9.0 to 12.5 GPa.

This invention relates to a linerless liquid hydrogen container carbon fiber composite material and its preparation method. The preparation method includes the following steps: reacting a hydroxyl-terminated polymer with a sulfonyl chloride group to generate a first solution; the hydroxyl-terminated polymer includes a hydroxyl-terminated hyperbranched polymer, a hydroxyl-terminated polyether polyol, or a hydroxyl-terminated liquid rubber; the sulfonyl chloride group organic compound includes dodecylbenzenesulfonyl chloride or ethylsulfonyl chloride; reacting the first solution with 1-methylimidazole, washing the product with a solvent, and vacuum drying to evaporate the solvent to obtain an ionic liquid; mixing the ionic liquid uniformly with graphene or hexagonal boron nitride nanosheets, adding a curing agent, mixing uniformly, then adding epoxy resin, mixing uniformly, and repeatedly vacuuming to obtain a modified epoxy resin mixed solution; and using the modified epoxy resin mixed solution to wind and mold carbon fiber composite material parts. This invention enhances the low-temperature toughness and gas barrier properties of carbon fiber composite materials.

A laminate 1 comprises a paper substrate 10, a filling layer 12, and a gas barrier layer 14 in this order. A product parameter M×S of a basis weight M (g / m2) and a smoothness S (seconds) in the filling layer 12 is 4,000 or more.

To provide a gas barrier film that has good and stable water vapor barrier properties while incorporating a gas barrier layer containing silicon dioxide. [Solution] The gas barrier film according to the present invention comprises a substrate layer and a gas barrier layer made of an inorganic oxide containing Si, Bi, and O, provided on one or both sides of the substrate layer, wherein the surface of the gas barrier layer is measured by X-ray photoelectron spectroscopy, and Si 2p Peak, Bi 4f7 / 2 Peak and O 1s The Bi / (Si+Bi) ratio, calculated using the peak area intensity, is between 0.10 and 0.80, and the O / (Si+Bi) ratio is between 1.00 and 1.80.

To provide a gas barrier film that has good and stable water vapor barrier properties while incorporating a gas barrier layer containing silicon dioxide. [Solution] The gas barrier film according to the present invention comprises a substrate layer and a gas barrier layer made of an inorganic oxide containing Si, Ga, and O, provided on one or both sides of the substrate layer, wherein the surface of the gas barrier layer is measured by X-ray photoelectron spectroscopy, and Si 2p Peak, Ga 3d Peak and O 1s The Ga / (Si+Ga) ratio, calculated using the peak area intensity, is between 0.05 and 0.80, and the O / (Si+Ga) ratio is between 1.00 and 1.80.

A manufacturing line for manufacturing a compostable pod for brewing products, the pod made of two complementary portions. The manufacturing line includes at least one shaping line for shaping the complementary portions, and the shaping line includes: a handling unit for handling the sheet of biodegradable paper-based material with gas barrier biodegradable polymer; a humidifying unit for moistening at least one side of the sheet of biodegradable paper-based material; an optional pre-drying unit for drying, at least partially, the at least one side of the sheet of biodegradable paper-based material; a forming unit for shaping the sheet of biodegradable paper-based material into one of the complementary portions; and a drying unit for drying the at least one side of the sheet of biodegradable paper-based material forming one of the complementary portions.

The invention relates to a bag system (1) for treating a biological fluid by electromagnetic irradiation. The bag system comprises at least one element consisting of an irradiation bag (2) intended to contain the biological fluid to be irradiated. The irradiation bag (2) is made of a material permeable to the electromagnetic radiation. The bag system (1) further comprises at least one protective film (26a, 26b) covering the irradiation bag (2). The protective film (26a, 26b) is made of a gas barrier polymeric material with an oxygen permeability less than or equal to 100 cm3 / m2 / 24 at a temperature of 23 °C and a relative humidity of 50%.

[Problem] To provide a laminated film which is formed of a laminate of a polypropylene film as a main body and has a basic single resin type with less environmental load, and has gas barrier properties required for a packaging material when an inorganic film layer is laminated. [Means for Solving the Problem] A laminated film for forming an inorganic film layer, characterized by having a cover layer laminated on at least one surface of a base material layer of a polypropylene resin as a main component, and satisfying the following conditions (I) to (III). (I) The heat elongation rate at 130°C of the laminated film is 10% or less in the MD direction and the TD direction. (II) The total of the maximum peak height (Rp) and the maximum valley depth (Rv) obtained by measuring the side surface of the cover layer with a scanning probe microscope is 30.0 nm or less. (III) The attachment amount of the cover layer is 0.10 g / m 2 or more and 0.50 g / m 2 or less.

The main purpose of the present invention is to provide a rubber molded article that has a layer of a non-fluorine-based resin film on the surface, and that has preferable gas barrier properties and electron beam resistance and exhibits preferable moldability during production.　Provided is a rubber molded article that includes a layer of a non-fluorine-based resin film. The non-fluorine-based resin film before being laminated exhibits a ratio (TD / MD) of 0.80-1.20 regarding the elongation in the TD-direction with respect to the elongation in the MD-direction. Furthermore, the elongation in the MD-direction may be 150-450% and the elongation in the TD-direction may be 150-450% in the non-fluorine-based resin film before being laminated.

A gas barrier film includes a multilayer polyethylene film and a gas barrier layer, in which the multilayer polyethylene film includes at least three layers of a front layer, an intermediate layer, and a rear layer in this order on the gas barrier layer side; the intermediate layer has a probe descent temperature which is higher than that of the front layer and is higher than or equal to that of the rear layer; the front layer is constituted of a medium-density polyethylene resin having a density of 0.926 g / cm3 or more, or a high-density polyethylene resin; and the gas barrier layer includes at least either of an inorganic oxide layer and a gas barrier coating layer.