659 results about "Gas barrier" patented technology

The invention relates to the field of electromagnetic functional composite materials, and particularly discloses a multi-layer composite structure flexible frequency selective surface material and a preparation method thereof. The ultra-high molecular weight polymer fiber-reinforced polymer-based composite material thin-film mechanical enhanced band-pass frequency selection array sequentially comprises an acrylic acid polyvinylidene fluoride organic polymer coating environment-resistant layer, a metal oxide organic film isolation layer, an ultra-high molecular weight polymer fiber-reinforced polymer-based composite material thin-film mechanical enhanced layer, a band-pass frequency selection layer and a packaging protection layer from top to bottom, and the band-pass frequency selection layer is a hexagonal / circular ring nested band-pass frequency selection pattern array. The packaging protection layer is formed by printing a conductive coating composed of conductive filler / polymer resin matrix, and the packaging protection layer is an ink coating. The flexible frequency selective surface material has the characteristics of light weight, high strength, salt fog / rain / ultraviolet and other severe environments, frequency selective wave transmission and multiple functions, has good gas barrier property, is beneficial to maintaining the shape of an inflatable hangar made of a skin and ensuring normal operation of radar equipment, and has good practical engineering application value.

The invention discloses a PHA-acrylic acid structural unit water-based dispersion based on interface engineering regulation and control, a preparation method thereof and application of a paper-based barrier coating, and belongs to the technical field of high polymer materials, interface engineering and water-based coatings. The stable interface layer is constructed in situ between the crystalline PHA and the acrylic resin through the amphiphilic polymer, so that the problems of poor compatibility and film forming defects of a bio-based material are effectively solved. The dispersion can realize excellent waterproof, oil-proof and gas barrier effects by only needing a relatively low coating weight, and the material consumption is remarkably reduced. The unique gradient structure of the coating has excellent mechanical adhesive force and efficient re-pulping and recycling characteristics, and the technical defect that a traditional barrier coating is difficult to recycle is overcome. And an ideal solution with high performance and high safety is provided for green packaging.

This invention discloses a one-piece molded all-plastic flexible hose sheet and its composite hose, belonging to the field of polymer material technology. The one-piece molded all-plastic flexible hose sheet of this invention has a three-layer structure: an outer PE film, an intermediate layer, and an inner PE film. The intermediate layer is selected from one of the following: an intermediate polymer layer, a three-layer composite layer formed by an intermediate polymer layer, a polyethylene layer, and an intermediate polymer layer, or a three-layer composite layer formed by an intermediate polymer layer, an ethylene-vinyl alcohol copolymer layer, and an intermediate polymer layer; the intermediate layer may have a double-sided coated or uncoated adhesive layer; the intermediate polymer layer is polymerized from 2,6-dihydroxyisophthalic acid, diaminoalkane, and 4,4'-tetraphenylsilane. The all-plastic flexible hose sheet provided by this invention is formed in one piece using a five-layer co-extrusion machine, possessing excellent gas barrier properties, water vapor barrier properties, high mechanical strength, and good interlayer peel strength.

The invention discloses a paper-based composite film, which adopts a four-layer structural design, and the outer layer is an ultraviolet shielding layer formed by coating TiO2 with lignin; the transition layer is composed of 32-64 PLA / PBAT alternating microlayers, and the multiple alternating transition layers form a zigzag gas barrier path; ag-coated ZIF-8 nanoparticles are loaded on the paper base layer, so that long-acting antibiosis is realized by slowly releasing silver ions; and the inner layer adopts a PPC / PBS blend to support the heat sealing layer with adjustable heat sealing strength. According to the preparation process, a gradient micro-layer structure is constructed through a multi-runner co-extrusion die head and a layer multiplier, silver ions are loaded to ZIF-8 through an ultrasonic-vacuum impregnation process, the hydroxyl density of the surface of the paper base layer is improved through plasma treatment, good interlayer strength is achieved, ester bond crosslinking is induced in a pre-irradiation mode, and the product is prepared. The paper-based composite film has ultraviolet shielding, gradient blocking, slow-release antibacterial and controllable heat sealing performance, the interface bonding strength of a traditional paper-based composite film is greatly improved, all components are biodegradable, and the paper-based composite film is suitable for packaging of food, medicine and the like.

A gas barrier laminate including: a substrate layer which contains a polyolefin resin; a barrier layer; and an overcoat layer which contains a polyvinyl alcohol resin, the overcoat layer having a surface which has a surface hardness of 1.5 GPa or less, as measured by a nanoindentation method.

The invention relates to the technical field of packaging materials, and discloses a high-barrier multilayer co-extrusion composite film which sequentially comprises an inner layer, a first bonding layer, a first barrier layer, a second bonding layer, a second barrier layer, a third bonding layer and an outer layer from bottom to top. And the second barrier layer is a nano silicon dioxide modified polyvinyl alcohol layer. The two different barrier layers are arranged, the first barrier layer has a good barrier effect on gas, the second barrier layer has outstanding barrier performance on water vapor, and the two barrier layers have a synergistic effect, so that the comprehensive barrier performance of the composite film on oxygen, water vapor, peculiar smell and the like is remarkably improved, the shelf life of a packaged product can be effectively prolonged, and the packaging cost is reduced. According to the high-barrier film, the high-barrier property is ensured, the quality and the performance of a product are ensured, and the use of expensive materials and a complex production process is avoided and the production cost is reduced by reasonably selecting each layer of material and optimizing the structural design on the premise of ensuring the high-barrier property.

The invention discloses a flexible packaging material and a preparation method and application thereof. The flexible packaging material comprises a sandwich structure formed by sequentially stacking a polymer elastomer with a viscoplastic surface layer, a self-adaptive gas barrier layer and a polymer elastomer with a viscoplastic surface layer, wherein the viscoplastic surface layer of the polymer elastomer consists of a non-polar viscoelastic molecular network and a plastic polar polymer microdomain; the self-adaptive gas barrier layer is at least one of liquid metal, hygroscopic gel and viscous hygroscopic liquid; and the viscoplastic surface layers of the upper and lower polymer elastomers are respectively contacted with two surfaces of the self-adaptive gas barrier layer, so that a sandwich structure is formed. The flexible packaging material not only can be flexibly stretched, but also has ultrahigh gas barrier property, and has important significance and value for promoting the practical application and industrialization process of flexible electronic devices.

The invention discloses an electric flame stove capable of eliminating ozone. The electric flame stove comprises a stove body, a magnetic energy box mounted at the upper end of the stove body and a burner mounted in the stove body, and a magnetron is arranged at the microwave emission port in the magnetic energy box. The high-frequency electromagnetic wave is adopted to excite the initial plasma, so that the temperature and efficiency of the electric flame are improved, and the high-temperature cooking requirements such as stir-frying in a kitchen are met; the reaction between active particles (oxygen ions O or oxygen atoms O) in plasma and ozone is accelerated by adopting high-frequency electromagnetic waves, and finally ozone molecules are decomposed and reduced, so that ozone overflow is inhibited; in a non-pot state, the density of the plasma in the double hearths is small, the microwave switch is switched off, the magnetron stops working, and microwave leakage is completely eradicated from the source; the cooling tank is annularly distributed on the side wall of the second hearth to form a continuous gas barrier surrounding the second hearth, so that the magnetron and the side wall of the second hearth are prevented from being influenced by ultrahigh temperature.

The invention discloses a supercritical CO2 phase change cooling heat prevention and control system and method for an energy storage and power battery. According to the invention, the thermophysical property change of supercritical CO2 near a critical point is utilized, so that the volume is greatly reduced, and extremely high heat dissipation efficiency is realized; a multi-stage energy recovery framework is adopted, and gradient utilization of energy is achieved through the synergistic effect of the heat exchanger and the heat regenerator; the phase change evaporation module effectively solves the problem of high-power-density heat dissipation; the modular design enables the thermal management system to occupy a very small area; the battery can stably operate in an environment temperature range of 0-100 DEG C, and is suitable for harsh working conditions such as variable-rate frequent charging and discharging; a thermal runaway emergency system is integrated, liquid direct injection can be completed within seconds, an inert gas barrier is formed, and a triple protection system of'active cooling-emergency inerting protection-environment moisture prevention 'is constructed in cooperation with a refrigeration main cycle and a condensation dehumidification module; the method is also applied to new energy electric vehicle power batteries, 5G base station standby power supplies, satellite and space station energy storage systems and other scenes.

To provide a gas barrier laminate having a gas barrier coating film excellent in oxygen barrier properties and transparency and having steam barrier properties more excellent than those of a conventional gas barrier coating film, and to provide a coating composition capable of efficiently forming the gas barrier coating film.SOLUTION: The gas barrier laminate has a gas barrier coating film on a substrate, and is characterized in that it is free from coloration derived from organic compounds such as amine compounds and carboxylic acid compounds, the content ratio (P / Zr) of Zr (Zr-kα) and P (P-kα) in fluorescent X-ray measurement of the coating film is in the range of 1.39 to 2.59, and the ratio (P2 / P1) of the peak area (P2) at 2600 to 3700 cm-1 to the peak area (P1) at 850 to 1350 cm-1 in the infrared absorption spectrum of the coating film is less than 0.772.SELECTED DRAWING: None

A resin composition containing a hydrophilic resin and a metal compound, and satisfies the following expression (1) when being formed into a film:α1−β1≥1  (1)wherein α1 is an average metal atom concentration (%) in a portion of the film in a depth range of 0 to 9 nm from a film surface, and β1 is an average metal atom concentration (%) in a portion of the film in a depth range of 12 to 21 nm from the film surface. The resin composition is excellent in gas barrier property, particularly in oxygen barrier property, in a high humidity environment.

The invention discloses a high-temperature-resistant polyurethane elastomer and a preparation method thereof, and relates to the technical field of polymer materials, the high-temperature-resistant polyurethane elastomer comprises the following specific components: polyether polyol, poly (toluene diisocynate) pMD I, a chain extender and a cross-linking agent; the high-temperature-resistant polyurethane elastomer further comprises additives, wherein the additives specifically comprise nano aluminum silicate fibers, a titanium phosphate-based temperature-resistant synergist, a multi-walled carbon nanotube grafted amide group and a metal organic framework composite material. According to the high-temperature-resistant polyurethane elastomer and the preparation method thereof, multiple additives and nano aluminum silicate fibers are introduced into the polyurethane elastomer, so that the thermal isolation property of the material is effectively improved; the multi-walled carbon nanotube grafted amide group improves the thermal conductivity, and solves the problem of poor dispersibility of the carbon nanotube in a polyurethane matrix; the thermal stability of the material is further improved by the titanium phosphate-based temperature-resistant synergist; the introduction of the metal organic framework composite material significantly improves the gas isolation and thermal stability of the material.

To provide process paper that can prevent evaporation of volatile ingredients during storage or transportation.SOLUTION: Process paper has barrier-coated paper and a release agent layer on at least one surface of the barrier-coated paper, wherein the barrier-coated paper comprises a paper substrate and a gas barrier coating layer on at least one surface, and the paper substrate has a thickness of 50 μm or more and 200 μm or less, a density of 0.5 g / cm3 or more and 1.1 g / cm3 or less, and a dry shrinkage ratio in the CD direction of 0.6% or less.SELECTED DRAWING: None

The soft envelope laminate according to the present disclosure includes a base material layer, a gas barrier layer, a first sealant layer, and a second sealant layer stacked in this order, in which the elastic modulus of the first sealant layer is greater than the elastic modulus of the second sealant layer. Since the elastic modulus of the first sealant layer is adjusted to be greater than the elastic modulus of the second sealant layer, when a tensile stress is applied to a sealing part of a pouch type battery case prepared from the pouch film laminate, deformation caused by the tensile stress is distributed to the second sealant layer instead of being concentrated in the first sealant layer, and the sealing part of the pouch type battery case is sealed by the pouch film laminate. Therefore, the sealing strength higher than that of the conventional condition can be realized.

The invention relates to the technical field of polymeric membrane materials, in particular to a functional packaging membrane material and a preparation method thereof. The packaging film material is prepared from PET, PLA, a modifier and an ultraviolet absorbent, wherein the modifier is formed by grafting dimethyl terephthalate, ethylene glycol and dihydroxyl-terminated polylactic acid to the surface of carboxylated graphene after ester exchange. Under the synergistic effect of the carboxylated graphene nanosheets and the modifier, the uniform dispersion and interface bonding strength of the nanofiller are effectively improved, so that the compatibility of PET (Polyethylene Terephthalate) and PLA (Polylactic Acid) is optimized. According to the structural design, the comprehensive performance such as tensile strength, toughness, gas barrier property and thermal deformation temperature of the composite material can be remarkably improved, and meanwhile, good processability and degradability of the material are guaranteed. The invention provides reliable technical support for developing a novel green packaging film material with high performance and low environmental burden, and has wide industrial application prospect.

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.

The invention relates to the technical field of high polymer materials, in particular to high-barrier modified polyethylene which comprises high-density polyethylene, vinyl silane, montmorillonite, alkali, an antioxidant, nano silicon dioxide, a polyolefin grafted compound, a plasticizer and a stabilizer. According to the invention, additives such as vinyl silane, modified montmorillonite and the like are introduced into high-density polyethylene, and an irradiation crosslinking process is adopted, so that the gas barrier property and the mechanical property of polyethylene are remarkably improved; through surface modification of the montmorillonite, the compatibility of the montmorillonite and a polyethylene matrix is improved, so that the polyethylene matrix is more uniform in microstructure, and the barrier effect is effectively enhanced; by adopting an irradiation crosslinking technology, not only is the barrier property of polyethylene improved, but also the heat resistance and the mechanical strength of the polyethylene are enhanced, so that the material can keep stable performance in a harsh environment; compared with a traditional modification method, the method has the advantages that the production process is simplified, and the dependence on chemical additives is reduced.

Provided are: a gas barrier film that includes a vapor deposition layer (B) that includes at least one metal element selected from among zinc, magnesium, and calcium and a compound that has a carbonyl group on a plastic film; and a packaging body that includes the gas barrier film. The peak ratio (A1575 / A1687) of the absorption peak height A1687 at a wavenumber of 1687 cm-1 to the absorption peak height A1575 at a wavenumber of 1575 m-1 on an infrared absorption spectrum for the vapor deposition layer (B) is preferably 0.1–5.0.

The invention discloses an automatic cleaning system for industrial television coking materials of a substrate glass kiln, and belongs to the technical field of coking material cleaning. The device comprises a high-temperature-resistant extension protective sleeve, a multi-layer annular space gas barrier module, a central vortex gas cleaning module, a self-sealing pneumatic valve, a clean gas supply system and an intelligent control system. The gas barrier module is integrated on the inner wall of the protective sleeve and can form laminar flow and oblique composite gas flow on the surface of the optical window to actively isolate pollutants; the vortex cleaning module is coaxially arranged in front of the window, and high-speed rotating airflow is generated through a plurality of tangential nozzles to clean coking materials; the self-sealing valve seals the window in a non-cleaning state; the intelligent control system automatically controls the cleaning process according to temperature and image signals. According to the invention, continuous protection, automatic cleaning and intelligent regulation and control of the industrial television window are realized, and the reliability and safety of kiln monitoring are obviously improved.

The invention discloses a fire extinguishing microcapsule with an EVA ultraviolet crosslinking barrier material as a wall material and a preparation process of the fire extinguishing microcapsule. According to the fire extinguishing microcapsule with the EVA ultraviolet crosslinking barrier material as the wall material, the whole fire extinguishing microcapsule is spherical or sphere-like, a composite material of EVA and graphene is used as the wall material, a core material is wrapped in the wall material, the thickness of the wall material is 10-50 microns, and the diameter of the fire extinguishing microcapsule is 300-500 microns. The excellent gas barrier property of the EVA and graphene composite wall material is utilized, volatilization of perfluorohexanone is effectively blocked, the storage stability of the fire extinguishing microcapsule is improved, the service life of the fire extinguishing microcapsule is prolonged, and the effective content of a fire extinguishing agent during fire extinguishing is guaranteed.

The present invention discloses a degradable plastic, a container made from the plastic, and a preparation method thereof, belonging to the technical field of degradable plastic container processing. The preparation method of the degradable plastic comprises the following steps: mixing polybutylene terephthalate-adipate resin, starch, composite aerogel, modified corn straw fiber, a lubricant, and a plasticizer, stirring uniformly to obtain a mixture; and extruding and granulating the mixture to obtain a degradable plastic. The composite aerogel has gas barrier properties, improving the gas barrier properties of the polybutylene terephthalate-adipate plastic container. The composite aerogel also has high mechanical strength, preventing the leakage of modified ultrafine coal powder caused by the poor mechanical properties of the sericin aerogel, causing the modified ultrafine coal powder to migrate and precipitate in the plastic, affecting the degradation performance of the plastic.

A method for obtaining low molecular weight polytetrafluoroethylene (PTFE) comprising the following steps: provision of high molecular weight PTFE; arrangement of said high molecular weight PTFE in a chamber, delimited by a gas barrier and containing a controlled atmosphere with an amount of oxygen comprised from 0.005% to 0.5% by volume; hermetically sealing of said chamber containing said high molecular weight PTFE; irradiating said PTFE into said hermetically sealed chamber to obtain said low molecular weight PTFE.

The present invention discloses a degradable cling film for fruit preservation and a preparation method thereof, and belongs to the technical field of cling film. The cling film comprises the following raw materials in parts by weight: 40-60 parts of polylactic acid, 15-25 parts of polyvinyl alcohol, 6-12 parts of cellulose, 10-20 parts of modified chitosan, and 3-9 parts of lubricant. The prepared cling film is based on polylactic acid, which gives the cling film high transparency, heat resistance and degradability; wherein the polyvinyl alcohol is a degradable material that can enhance the gas barrier property of the cling film; wherein the cellulose can improve the thermal stability and mechanical properties of the cling film; wherein the modified chitosan can enhance the antibacterial property, heat resistance, water barrier property and mechanical property of the cling film, and the performance is long-lasting and stable; therefore, the cling film prepared by the present invention has excellent mechanical properties, good barrier property, stable and efficient antibacterial and heat resistance, and is environmentally friendly and degradable, and has important application value in the technical field of cling film.

The invention relates to a biodegradable high-toughness and high-barrier composite membrane, which comprises an inner PVA-based composite membrane and an outer chitosan-based composite membrane, the two layers are compounded through tape casting and are combined through dynamic bonds, and after the two layers are compounded, the two layers are subjected to membrane treatment by adopting a double-drawing process to obtain the biodegradable high-toughness and high-barrier composite membrane, and the biodegradable high-toughness and high-barrier composite membrane has excellent strength, toughness and water and gas barrier property. The water vapor barrier property is greatly higher than that of a common pure PVA film, and the film also has surface antibacterial property and can be applied to the field of food and medicine packaging.

To provide a packaging film, a packaging bag, and a packaged product capable of having excellent gas barrier properties while suppressing a decrease in the ratio of polyolefin-based resin in the entire packaging film.SOLUTION: A packaging film includes a gas barrier film, an adhesive layer, and a sealant layer in this order. The gas barrier film includes a base material layer, an anchor coat layer, and a vapor deposition layer in this order. The base material layer includes a polyolefin-based base material layer containing a polyolefin-based resin. The anchor coat layer contains a polyurethane resin and has a thickness of 0.02 μm or more. The adhesive layer is obtained by bonding an adhesive resin composition containing a polyolefin-based adhesive resin to the gas barrier film by melt extrusion. The sealant layer contains a polyolefin-based resin.SELECTED DRAWING: Figure 1

The invention relates to an interfacial polymerization PBI modified alkaline water electrolysis composite diaphragm as well as a preparation method and application thereof. The alkaline water electrolysis composite diaphragm provided by the invention has excellent super-hydrophilicity, high gas barrier property, low surface resistance and alkali-resistant stability. The method has the advantages of stable physical properties, mild and simple process, green and environment-friendly raw materials, low cost and industrial application potential.

The invention concerns a preform (10) for forming a bottle for gaseous beverage, the preform comprising a multilayered wall obtained by injection in a mould from an injecting point (22) located at a central bottom end of the preform, the multilayered wall including an inner layer (24), an outer layer (26) and a gasbarrier layer (28) sandwiched between the inner and outer layer. The gas barrier layer (26) advantageously extends along the entire preform multilayered wall except for a bottom ending portion (30), this bottom ending portion free of barrier layer (30) being a central part of a base-forming portion (20) delimited by a solid angle (α) comprised between 5° to 80°, the apex (C) of this solid angle being the centre of a semi-spherical lower segment of the base-forming portion (20). A bottle obtained by blow-moulding such a preform has a bottom ending portion free of barrier layer within a solid angle comprised between 5° and 50°.

To provide a laminate that is highly recyclable and has excellent heat-sealing properties. [Solution] A laminate comprising at least a base layer, an adhesive layer, and a sealant layer in this order, wherein a protective layer is provided on the outermost side of the base layer, the protective layer is made of a thermosetting resin, both the base layer and the sealant layer are made of polyethylene resin, the base layer has a probe drop temperature of 180°C or higher, the proportion of polyethylene in the laminate is 90% by mass or higher, and the adhesive layer is formed from a polyamine-based adhesive or a urethane-based adhesive having gas barrier properties.

The present invention provides a barrier paper that can suppress the decrease in barrier properties when folded, and also has good heat seal strength, suitability for bag making, and blocking suppression properties. [Solution] A barrier paper according to one aspect of the present invention comprises a base material, a gas barrier layer laminated on one or both sides of the base material, and a water vapor barrier layer laminated on the surface of the gas barrier layer, wherein the gas barrier layer mainly consists of polyvinyl alcohol, the water vapor barrier layer contains a wax resin and a styrene-acrylic copolymer as its main component, the amount of wax resin in the water vapor barrier layer is 3 parts by mass or more and 11 parts by mass or less per 100 parts by mass of styrene-acrylic copolymer, the gas barrier layer contains an inorganic compound in an amount of 15 parts by mass or less per 100 parts by mass of polyvinyl alcohol, or does not contain an inorganic compound, and the water vapor barrier layer does not contain an inorganic compound.

To provide a laminate having a polyolefin layer, a vapor-deposited film, and an adhesive layer, the laminate exhibiting excellent gas barrier performance and excellent adhesion between the adhesive layer and an adjacent layer thereto.SOLUTION: A laminate comprises, in this order in the lamination direction, a first polyolefin layer, an adhesive layer containing a polyolefin plastomer and an acid group-containing ethylene-based polymer, and a second polyolefin layer, wherein a vapor-deposited film is further provided between the first polyolefin layer and the adhesive layer and / or between the adhesive layer and the second polyolefin layer.SELECTED DRAWING: Figure 1