822 results about "Gas barrier" patented technology

The invention relates to the technical field of composite film preparation, in particular to a multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film and a preparation method thereof.The multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film comprises a base material layer, a gas barrier layer, a bonding transition layer and a nano ceramic functional coating; the base material layer comprises the following components in parts by mass: 80-100 parts of biaxially oriented polypropylene; 20 to 30 parts of metallocene linear low density polyethylene; 5 to 8 parts of nano titanium dioxide; 0.5 to 1 part of beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid; and 0.3 to 0.6 part of calcium stearate. Through the multi-layer co-extrusion and gradient curing technology and the five-layer co-extrusion technology, it is ensured that the thickness of a base film is uniform and interlayer bonding is firm, the adhesive force of the coating is enhanced through plasma surface treatment, and activity retention and uniform distribution of functional components are guaranteed through the segmented curing strategy of the nano ceramic coating; compared with a traditional hot-pressing compounding or solvent coating process of the composite film, the energy consumption and the solvent residue risk are greatly reduced, meanwhile, the production efficiency and the product consistency are improved, and large-scale application is provided for medicine packaging.

The invention provides a preparation method of an environment-friendly high-performance gas barrier film, which is characterized in that a solution blending method is adopted to prepare a polyvinyl alcohol / nanocellulose / covalent organic framework nanosheet ternary composite system, and a coating method is adopted to prepare the high-performance gas barrier film under high-temperature evaporation. Multidimensional mixed nanocellulose and covalent organic framework nanosheets are introduced as functional fillers to form a stable intercalation structure with a polyvinyl alcohol matrix, so that the interfacial compatibility of the components is remarkably improved. The multi-component gas barrier film is endowed with high humidity resistance, chemical stability, high gas barrier property and the like by regulating and controlling the heat treatment temperature, the environment-friendly gas barrier film material shows good application prospects in the fields of chemical protective clothing and the like, and a new thought is provided for development of high-performance protective materials.

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.

The invention belongs to the technical field of insulating materials, and particularly discloses an insulating material for an insulating soft sling for extra-high voltage working and a preparation method and application of the insulating material. The insulating material is prepared by mixing ZIF-8 particles and polytetrafluoroethylene powder according to a specific mass ratio and utilizing a dry process. And soaking and coating by using a polydimethylsiloxane (PDMS) solution to obtain a double-layer composite insulating material, and cutting and weaving to obtain the insulating soft sling. The high porosity and excellent gas adsorption performance of ZIF-8 and the insulating performance of PTFE and PDMS are combined, and the comprehensive performance of the insulating material is improved. The introduction of the ZIF-8 particles enhances the mechanical strength and the gas barrier property of the material, the PTFE and the PDMS provide good insulativity and corrosion resistance, and the synergistic effect of the PTFE, the PDMS and the ZIF-8 particles realizes the high-performance application of the insulating sling in a complex environment. Meanwhile, the preparation method and device are easy to operate and low in cost, and large-scale production can be achieved.

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.

The invention discloses high-crystallinity copolyester based on furandicarboxylic acid as well as a preparation method and application of the high-crystallinity copolyester. The structural formula of the high-crystallinity copolyester is as follows: # imgabs0 # R1 is-O (CH2) aO-, R2 is-O (CH2) bO-, a, b, x, y, z and n are integers, a = 2-6, b = 6-12, x = 1-10, y = 1-10, z = 1-10, and n = 20-100; and (x + z): y = 1: 1-1: 10. The present invention also provides a highly crystalline copolyester article made from the highly crystalline copolyester. The high-crystallinity copolyester disclosed by the invention not only has excellent crystallization capacity, relatively high crystallinity, excellent thermal stability and mechanical property, but also has excellent barrier property, and has obvious advantages in various gas barrier aspects compared with PET (Polyethylene Terephthalate) on the market; the material can be widely applied to the fields of high-temperature-resistant materials, express packages, food packages, food tableware 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.

A barrier laminated film includes at least an unstretched laminated film and a vapor deposited film. The laminated film includes at least a polyolefin resin layer and a gas barrier resin layer, and the vapor deposited film is disposed on the gas barrier resin layer.

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.

A gas barrier film includes a substrate containing polypropylene as a main component, a gas barrier layer on a first surface of the substrate, and a coating layer on the gas barrier layer. Infrared spectroscopy of the first surface indicates a peak intensity (I1) at 1360 to 1390 cm−1 and a peak intensity (I2) at 1440 to 1480 cm−1 in a ratio satisfying the formula: (I1) / I(2)≤1.65.

A gas barrier laminate according to one aspect of the present disclosure is a gas barrier laminate including a paper base material, a first resin layer, a vapor-deposited layer, and a second resin layer in this order, in which the gas barrier laminate has a density of 0.9 g / cm3 or higher and 1.5 g / cm3 or lower, and a dimensional change percentage in a CD direction of a dimension under conditions of 40° C. and 90% RH with respect to a dimension under conditions of 40° C. and 20% RH of the gas barrier laminate is 0.8% or less.

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

The invention provides a channel type flow guide plate based on an inverted-cone-shaped pore plate structure. The channel type flow guide plate comprises a capillary porous plate and a groove structure. And the channel type guide plate is connected with a liquid accumulator at the bottom of the storage box through a bracket. The channel type flow guide plate is parallel to the inner wall face of the storage box and extends to the top of the storage box along the inner wall face. The cross section of the channel type guide plate is of a trapezoidal structure, the channel type guide plate is hollow, and a closed channel is formed for propellant flowing. A capillary perforated plate is arranged on the side, close to the wall face of the storage box, of the channel type flow guide plate, a plurality of micron-sized inverted-cone-shaped capillary pores are formed in the capillary perforated plate in a single-side laser drilling mode, and the functions of storing liquid and serving as a gas barrier can be achieved. The channel type guide plate is suitable for a satellite propulsion system with strong maneuverability and high acceleration, has the advantages of simple structure, portability, high reliability, strong flow conductivity and the like, and can provide guidance for the development of a third-generation surface tension storage tank PMD.

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 relates to the technical field of inorganic / organic composite film functional materials, and discloses a hydrotalcite material as well as a preparation method and application thereof. Carrying out a colloid mill nucleation reaction on the first mixed salt solution and an alkali solution to obtain hydrotalcite seed crystal slurry; mixing the second mixed salt solution, a slow-release precipitator, an anionic high-molecular polymer and a high-polarity polymer to obtain a mixed solution; dropwise adding the obtained mixed solution into hydrotalcite seed crystal slurry, and reacting to obtain a hydrotalcite material; wherein the first mixed salt solution and the second mixed salt solution both contain soluble divalent metal salt and soluble trivalent metal salt, and the types and the concentrations of the metal salts are the same. The hydrotalcite material provided by the invention has a larger plane size, and can effectively prolong the diffusion path of gas in a film and improve the gas barrier property when being added into a polymer matrix (such as polyurethane) as a functional aid.

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

To provide a gas barrier laminate that exhibits excellent environmental compatibility and offers sufficient suitability for bag production.SOLUTION: A gas barrier laminate according to the present disclosure has a laminated structure including a vapor-deposited layer and a sealant film in this order, wherein the sealant film contains a polyolefin resin, and assuming that the basis weight of the paper substrate is defined as X and the weight of the sealant film per m2 is defined as Y, the ratio of X to Y (X / Y) is 3.7 or more and 30.0 or less, and X is 10 g / m2 or more and 100 g / m2 or less.SELECTED DRAWING: Figure 1

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.

A gas barrier film includes: a substrate layer containing polypropylene or polyethylene as a main component; a gas barrier layer formed on a side of a first surface of the substrate layer; and a heat seal layer that is formed on a second surface opposite to the first surface and contains polypropylene or polyethylene as a main component. A peel strength between the substrate layer and the heat seal layer is 1.0 N / 15 mm or more and 7.0 N / 15 mm or less in a 180° peel test in accordance with JIS K 6854-2, and 1.0 N / 15 mm or more and 4.0 N / 15 mm or less in a T-peel test in accordance with JIS K 6854-3.

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.

The invention discloses a method for preparing a high barrier polypropylene film, and belongs to the technical field of polypropylene films. The method comprises the following raw materials in parts by weight: 80-100 parts of polypropylene resin, 18-30 parts of ethylene-vinyl alcohol copolymer, 5-15 parts of modifier, 0.1-0.3 parts of initiator, and 4-6 parts of lubricant. With polypropylene as the matrix, the film is endowed with excellent water barrier properties and mechanical properties; wherein the ethylene-vinyl alcohol copolymer can improve the gas barrier properties of the film, and is easy to process; the obtained film is a single-layer film, and the preparation process is simple; wherein the modifier can significantly enhance the film's antioxidant, antibacterial properties and a certain degree of hydrophobicity, and the performance is long-term and stable, and is not easy to fall off; therefore, the film prepared by the present invention has high mechanical properties, good barrier properties, simple process, and stable and efficient antioxidant, antibacterial properties and a certain degree of hydrophobicity, and has important application value in the technical field of polypropylene films.

To provide a vacuum insulation panel improved in manufacturability.SOLUTION: A vacuum insulation panel 100 in which a pair of plate materials 1 and 2 face each other to form an internal space Q between them comprises: a metallic first plate material 1; a metallic second plate material 2 that forms an internal space Q between it and the first plate material 1; and a spacer S that supports the first plate material 1 and the second plate material 2 from the internal space Q side. The first plate material 1 has: a first outer edge plate part 12; an upright plate part 13 that is erected from the first outer edge plate part 12 to be formed by a curve surface; and a main plate part 11 that is connected to the upright plate part 13 and is supported by the spacer S. A first resin material 3 having gas barrier properties is interposed between the first outer edge plate part 12 on an outer edge side of the first plate material 1 and a second outer edge plate part 22 on an outer edge side of the second plate material 2. The spacer S is a resin material and is separated from the first outer edge plate part 12 and the second outer edge plate part 22.SELECTED DRAWING: Figure 1

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.

To provide a laminate that can suppress a decrease in gas barrier property after retort processing when used in a packaging bag for a retort pouch or the like.SOLUTION: Provided is a laminate comprising at least: a barrier film in which a substrate, an inorganic oxide layer, and a coating layer with a barrier property are layered in this order; an adhesive agent layer; and a sealant layer, wherein the substrate comprises a stretched substrate that includes polypropylene as the primary component thereof, the sealant layer includes polypropylene as the primary component thereof, the barrier film is positioned such that the coating layer faces the adhesive agent layer side, the elastic modulus of a cross-section of the adhesive agent layer in the laminate is 100.0 MPa or less as measured using an atomic force microscope (AFM), and the indentation hardness from a cross-section of the coating layer in the laminate is 0.9 GPa to 1.7 GPa as measured using a nano-indentation method.SELECTED DRAWING: Figure 1