169results about How to "Low gas permeability" patented technology

The present invention relates to composite solid polymer electrolyte membranes (SPEMs) which include a porous polymer substrate interpenetrated with a water soluble ion-conducting material. SPEMs of the present invention are useful in electrochemical applications, including fuel cells and electrodialysis.

The present invention refers to a multilayer barrier film capable of encapsulating a moisture and / or oxygen sensitive electronic or optoelectronic device, the barrier film comprises at least one nanostructured layer comprising reactive nanoparticles capable of interacting with moisture and / or oxygen, the reactive nanoparticles being distributed within a polymeric binder, and at least one ultraviolet light neutralizing layer comprising a material capable of absorbing ultraviolet light, thereby limiting the transmission of ultraviolet light through the barrier film

The present invention relates to a medical container useful upon transportation of plural syringe barrels. The medical container includes at least a container main body and a holding member arranged inside the container main body. The holding member is provided at least with a plurality of cylindrical holding portions for holding syringe barrels. The container main body has at least a peripheral rim arranged on and along an outer periphery of an opening and a shoulder-shaped portion arranged on an inner wall of the container to arrange the holding member. The shoulder-shaped portion has at least three ribs for supporting the holding member, and has a structure that enables to arrange via the ribs the holding member in a horizontal position relative to a bottom wall of the container main body. According to the present invention, there is provided a medical container of a construction that can be promptly brought into a sterilized state by various methods, can be readily brought into a state capable of maintaining the sterilized state, and during transportation, can fixedly secure, without rattling, syringe barrels held upright by holders.

A silicone resin composition comprising (A) an organopolysiloxane containing silicon-bonded aryl and alkenyl groups in a molecule, (B) an organohydrogenpolysiloxane, and (C) an addition reaction catalyst is low gas permeable. An optoelectronic device encapsulated therewith is highly reliable.

The present invention relates to a multilayer barrier film capable of encapsulating a moisture and / or oxygen sensitive electronic or optoelectronic device, the barrier film including at least one nanostructured layer including reactive nanoparticles capable of interacting with moisture and / or oxygen, the reactive nanoparticles being distributed within a polymeric binder, and at least one ultraviolet light neutralizing layer comprising a material capable of absorbing ultraviolet light, thereby limiting the transmission of ultraviolet light through the barrier film.

The present invention relates to composite solid polymer electrolyte membranes (SPEMs) which include a porous polymer substrate interpenetrated with an ion-conducting material. SPEMs of the present invention are useful in electrochemical applications, including fuel cells and electrodialysis.

Described is a membrane comprising a microlayer polymeric composite having at least about 10 microlayers. The microlayers are each individually up to about 100 microns thick and alternate between at least one gas barrier material and at least one elastomeric material. The membrane can be formed into a pressurized bladder or cushioning device for many applications, including footwear and hydropneumatic accumulators.

The present invention provides a liquid crystalline resin composition capable of readily blow-molding a molded article having uniform thickness, with the addition of good blow-moldability owing to the improved drawdown-resistant property, the improved melt-tension increase rate, and other properties without deteriorating the low gas-permeability which is a characteristic of liquid crystalline resin. Specifically, it provides a liquid crystalline resin composition for blow molding, obtainable by melt-kneading: (A) 100 parts by weight of a melt-processable aromatic polyester and / or polyester amide, which can form an anisotropic molten phase; (B) 10 to 25 parts by weight of a styrene-based copolymer composed of 40 to 97% by weight of a styrene group, 60 to 3% by weight of a specific glycidyl ester of α,β-unsaturated acid and 0 to 50% by weight of other vinyl-based monomer, wherein the styrene-based copolymer has epoxy equivalents ranging from 300 to 3000 g / eq, and weight average molecular weights of 30000 or more; and (C) 0 to 100 parts by weight of one or more of fibrous filler, powdery or granular filler, and plate-like filler.

The accuracy and / or precision of measurements of extracellular acidification rate or CO2 evolution in cell culture medium may be improved by using materials with low CO2 permeability for medium-containing vessels.

The invention provides an improved method of collecting biogas from a landfill that results in more complete collection of biogas produced in the landfill, and with less contamination with air. The method involves providing the landfill with an upper gas containment layer near the surface of the landfill to retard biogas escape and air entrainment into the landfill. Underneath the gas containment layer is provided a gas-permeable conductive layer. Underneath the conductive layer, a well withdraws biogas from the landfill. Withdrawal of biogas from the well creates a partial vacuum that draws gas from the gas-permeable conductive layer down through the waste mass to the well. If the rate of gas withdrawal from the well is too rapid, air will be entrained from the atmosphere into the gas-permeable conductive layer. But if the rate of gas withdrawal from the well is too slow, biogas may percolate through the gas-containment layer and the surface of the landfill to escape. Monitoring the gas composition of the gas-permeable layer allows one to determine quickly and continuously whether the rate of gas withdrawal from the well is too fast or too slow.

The invention relates to laminated high oxygen barrier films for packaging applications and especially for shrinkable lidding applications. The multilayer heat shrinkable plastic film of the present invention comprises a laminate of at least two films 1 and 2, wherein film 1 has a hot glycerine shrinkage of more than 20% at 110° C. for 5 seconds and at least one of MD, TD directions; and film 2 has a hot glycerine shrinkage of less than 20% at 110° C. for 5 seconds in at least one of MD, TD directions.

The invention provides an improved method of collecting biogas from a landfill that results in more complete collection of biogas produced in the landfill, and with less contamination with air. The method involves providing the landfill with an upper gas containment layer near the surface of the landfill to retard biogas escape and air entrainment into the landfill. Underneath the gas containment layer is provided a gas-permeable conductive layer. Underneath the conductive layer, a well withdraws biogas from the landfill. Withdrawal of biogas from the well creates a partial vacuum that draws gas from the gas-permeable conductive layer down through the waste mass to the well. If the rate of gas withdrawal from the well is too rapid, air will be entrained from the atmosphere into the gas-permeable conductive layer. But if the rate of gas withdrawal from the well is too slow, biogas may percolate through the gas-containment layer and the surface of the landfill to escape. Monitoring the gas composition of the gas-permeable layer allows one to determine quickly and continuously whether the rate of gas withdrawal from the well is too fast or too slow.

Oriented films are prepared. A thermoplastic vulcanizate, prepared by mixing at least 20 wt % of a thermoset rubber by weight of the total composition into a thermoplastic polymer are disclosed. After the mixture is prepared the thermoset rubber is entrained as discrete particles within the continuous thermoplastic polymer phase. The resulting composite is subjected to a stress either by pulling, blow molding, or any other film-forming process as is known in the art. This stress causes the continuous phase polymer molecules to become aligned or oriented in the direction in which the stress was applied, thus creating the oriented thermoplastic vulcanizate of the invention. This material has improved gas permeability and improved flexibility properties.

A silicone resin composition comprising (A) an organopolysiloxane containing silicon-bonded aryl and alkenyl groups in a molecule, (B) an organohydrogenpolysiloxane, and (C) an addition reaction catalyst is low gas permeable. An optoelectronic device encapsulated therewith is highly reliable.

The invention relates to a composite material with high obstruction and high performance and a preparation method thereof. The composite material with high obstruction and high performance is a laminated body sequentially compounded by a polyfluoroethylene thin film layer, a polyurethane adhesive layer, an AL / PET film layer, a polyurethane adhesive layer, a Kevlar fabric layer and a polyurethane coating. The composite material can ensure lower gas permeability and good mechanical properties and fatigue resistivity under the condition of lighter quality and can be really adapted to the application requirement on the material with high obstruction in the aerospace field. The preparation method is a dry method solvent-free composite technology, the solid content of adhesive used for the method is 100 percent, and no solvent is contained. The method has the great characteristics of environment protection, high product hygiene index and product quality guarantee.

A natural rubber modification method based on a graphene modification technology. The invention belongs to the technical field of natural rubber material modification and particularly relates to a method of employing graphene or a derivative thereof to modify natural rubber through an aqueous-phase dispersion technology. According to the modification method, the graphene or the derivative thereof is homogeneously dispersed in natural rubber through the aqueous-phase dispersion technology to prepare the modified natural rubber. The modified natural rubber is improved by more than 40% in tensile strength and can reach 500% maximumly under an optimum concentration, is reduced by 10-20% in ultimate strain, is increased by 5-30% in elasticity modulus, is increased by 1000 times maximumly in electric-conductivity, is increased by 18-39% in thermal-conductivity, is reduced in air permeability and is increased in compactness.

A process of sealing a semiconductor substrate by contacting the semiconductor substrate with a surface of a release layer (I) of a gas barrier release film that is in the form of a mold, which includes vacuum suction; injecting a sealing resin between the semiconductor substrate and the mold; and releasing said mold from said semiconductor substrate having said sealing resin present thereon, where the gas barrier release film has a release layer (I), which has excellent releasability; a plastic support layer (II) supporting the release layer; and a metal or a metal oxide gas restraint layer (III), present between the release layer and the support layer, where the gas barrier release film exhibits a xylene gas permeability of at most 5×10−15 (kmol m / (s·m2·kPa)) at 170° C., and a surface of said release layer (I) has an arithmetic surface roughness of from 0.15 to 3.5 μm, exhibiting a satin-finish.

The invention provides a composite film having gas barrier, heat insulation and fire resistance properties. The composite film is characterized in that the composite film is sequentially formed by an inorganic fiber cloth layer 10, an aluminum-plastic composite layer 20 and a plastic composite layer 30 from outside to inside, and a binder is bonded between each two adjacent layers. The invention also provides a making method of the composite film having gas barrier, heat insulation and fire resistance properties. The barrier film has the characteristics of low gas and water transmittance, good alkali resistance, good weather resistance, good fire resistance, good puncture resistance, and no generation of a chemical reaction with an alkaline cement mortar, and can be widely used in the fields of machines, electronics, buildings, aviations, spaceflights, automobiles and ships needing heat insulation in the cold, hot and wet environments.