57 results about "Impenetrability" patented technology

A novel electrochemical fuel cell comprising at least one fuel cell assembly comprising a Membrane Electrode Assembly (MEA) interposed between an anode separator and a cathode separator. The Membrane Electrode Assembly comprises a solid polymer electrolyte or Proton Exchange Membrane (PEM) interposed between an anode and a cathode, each electrode comprising electrocatalyst. The anode separator contains the fuel flow field distribution features necessary to communicate the fuel to said anode. The cathode separator contains the oxidant flow field distribution features necessary to communicate the oxidant to said cathode. In addition, a Heat Transfer (HT) separator may be integrated into said fuel cell assembly. The Heat Transfer separator contains the flow field distribution features necessary to communicate Heat Transfer Fluid (HTF) through a Heat Transfer Zone (HTZ) in said fuel cell assembly in order to control the thermal conditions of the fuel cell assembly and stack. Each of the said anode, cathode and Heat Transfer separators are made up of a respective series of multiple conductive compression gaskets possessing inter-related fluid distribution channel and manifold features that form intra-communicating systems for the distribution of fuel, oxidant and Heat Transfer Fluid throughout the fuel cell separator and stack. Under sufficient mechanical load, the respective series of multiple compression gaskets are consolidated into fuel cell separators that demonstrate sufficient structural integrity to contain the PEMFC fluids under substantial pressure; that demonstrate sufficient electrical and thermal conductivity to enable the operation of a high-performing Proton Exchange Membrane Fuel Cell; that demonstrate sufficient material obduracy to bear the compressive load necessary to seal the fuel cell assembly and fuel cell stack; and that demonstrate sufficient fluid impermeability in order prevent fluid migration through the gasket material. Within the consolidated fuel cell separators, the inter-related channel and manifold features form an intra-communicating system for the distribution of fuel, oxidant and Heat Transfer Fluid throughout the fuel cell assembly and fuel cell stack. In addition, the present invention includes methods of manufacturing said electrochemical fuel cell.

A radiation emitting device of the present invention includes at least one radiation emitter, first and second electrical leads electrically coupled to the radiation emitter, and an integral encapsulant configured to encapsulate the radiation emitter and a portion of the first and second electrical leads. The encapsulant has at least a first zone and a second zone, where the second zone exhibits at least one different characteristic from the first zone. Such different characteristics may be a physical, structural, and / or compositional characteristic. Preferably, the at least one different characteristic includes at least one of the following: mechanical strength, thermal conductivity, thermal capacity, coefficient of thermal expansion, specific heat, oxygen and moisture impermeability, adhesion, and transmittance with respect to radiation emitted from the radiation emitter. The radiation emitter may be in a form of an emitter, and is preferably an LED.

A connecting ostomy device for coupling a collecting bag to a fixing device (10) includes a first joining part (16) connected to the fixing device and a second joining part (12) connected to the collecting bag. The joining parts interact by adhesion in a plane practically perpendicular to the axes of orifices (14) of the collecting bag of the fixing device in such a way that the transmission of the bag weight and the impermeability thereof are ensured by adhesion. The additional fixing elements (18, 20) ensure the alignment of the orifices (14) of the fixing device (10) and the collecting bag in a position thereof which is practically determined before the removal of the protective film from an adhesive surface. The connecting device is used for ostomy.

[Objective]: To provide a low-cost piston member for syringes, with sufficiently satisfying slidability and sealing performance such as non-leakage and vapor impermeability, without size limitation, from small to large diameters.[Solution]: A piston member 10, such as a gasket 10a or a middle piston 10b, is formed by cut-processing a PTFE block and is press-fitted in a syringe barrel 1 to be slidably used. Protruded rims 13 are formed at least in a circumferential direction of perimeter of a slide-contact surface 11a adjacent to a liquid contact surface 14 of a drug solution 30, in a slide-contact surface 11 of the piston member 10, slidingly making contact with an inner circumferential surface 2 of the syringe barrel 1. After cut-processing, pitch P of the protruded rims 13 is 50 μm or smaller, and press-fit margin T to the syringe barrel 1 is 10 to 150 μm.

The invention concerns a process for producing a polyolefin film having a combination of properties, specifically water vapor permeability and demonstrating reinforced liquid impermeability, said process comprising the steps of: coextrusion from a die of polyolefinic polymers and / or copolymers mixtures one of which at least contains inorganic fillers forming a precursor film; stretching of the precursor film to form a breathable multilayer film, which is characterized in that said precursor film is a base multilayer film having at least two contiguous layers of same composition, having at the structure "B"-"B", optionally associated to at least one layer having a different composition from the two contiguous layers "B"-"B", and having a specific characteristic.

A prepreg composite material that includes a fiber layer and a resin comprising a thermoset resin component, a curing agent and a fibrous micropulp. The micropulp component is an aramid fiber having a volume average length of from 0.01 to 100 micrometers. The prepreg is useful in composite panel construction for minimizing fluid permeation into the cured structure. This prepreg is particularly suitable for making honeycomb sandwich panels. Film adhesives, liquid and paste resins containing aramid fiber micropulp are also disclosed.

Chemical and biological protective firefighter turnout gear garments are provided. The protective fabric includes at least one sorptive, reactive, or combined sorptive / reactive material capable of providing protection from at least one chemical or biological agent. The sorptive, reactive or sorptive / reactive material preferably can be recharged, regenerated or removed and replaced to allow for increased garment life. Embodiments of the fabric, garment, and methods for making the fabric and / or garment can provide in a protective garment a unique combination of sorptive / reactive capability, flame resistance, water vapor permeability, liquid impermeability, comfort and durability.

A relatively small amount of a plasticizer having an SP value of at least 8.8 and a molecular weight of at most 550 is added to blend rubber of NBR-PVC in which NBR has an AN content of from 43 to 50% by weight. The fuel impermeability and the low-temperature flexibility of the resulting rubber composition are improved to be comparable to those of FKM, and the amount of the plasticizer and its reaction product to be released from the rubber composition in fuel is reduced. Adding a controlled amount of carbon black to the rubber composition makes the composition have favorable electroconductivity. The rubber composition is formed into hoses or electroconductive hoses of low fuel permeation.

The present invention relates to implantable endoluminal prostheses and methods of using such devices in preventing clots migration to avoid ischemic strokes. The implantable endoluminal prosthesisissuitable for deployment from the aortic annulus to the aorta and comprises a self-expandable braided framework able to expand from a radially compressed state in a delivery configuration to a radiallyexpanded state, and a radially collapsible valve body comprising an impermeable material.The self-expandable braided framework isformed of braidedwires having a given diameter,and hasa proximal end configured to extend toward the heart and a distal end configured to extent toward away from the heart and extending along an axis.The braided framework comprises a main tubular body at the distal end of the self-expandable braided framework,a neck at the proximal end of the self-expandable braided framework, a transition portion extending between the proximal end of the main tubular body and the distal end of the neck. The main tubular body 3 and the neck comprisea lumen in a cylindrical form with a circular cross-section and a constant diameterrespectively, and the diameter of the main tubularbody is larger than the one of the neck. The main tubular body, theneck and thetransition portion consistof an integrated structure comprising plurality of layers of made of biocompatible material, being devoid of any impermeable cover layer, and forming a wall having a thickness. The valve body is placed within the lumen of the neck.

Disclosed is an electrolyte membrane which enables a fuel cell to have a high maximum output when used therein since it has high proton conductivity and high hydrogen gas impermeability. Also disclosed are a method for producing such an electrolyte membrane, and a solid polymer fuel cell using such an electrolyte membrane. A method for producing an electrolyte membrane including a step for impregnating a porous base with a solution containing a sulfonic acid group-containing vinyl monomer and then polymerizing the monomer is characterized in that 80% by mole or more of vinyl sulfonic acid having purity of 90% or more, and / or a salt thereof is contained as the sulfonic acid group-containing vinyl monomer, and the concentration of the vinyl sulfonic acid and / or a salt thereof in the solution is set at 35% by weight or more.

A fuel storage device includes a fuel tank that stores liquid fuel which is fed through a fill opening of a vehicle. The fuel tank includes a tank case and a separating film. The tank case has a projecting shape in section and defines a two-tiered upper-lower fuel storage chamber in a state where the fuel tank is disposed in the vehicle. The separating film is deformable in the tank case and has impermeability against liquid fuel in the fuel storage chamber. The fuel storage chamber includes a primary fuel storage chamber and a secondary fuel storage chamber. The primary chamber is surrounded partly with the separating film and communicates with the fill opening. The secondary chamber projects toward an upper side of the primary chamber in the state where the fuel tank is disposed in the vehicle and communicates with the fill opening only via the primary chamber.

In accordance with a version of the invention, graphene with a ferroelectric material is used as the transparent electrode material in an electrochromic device. The use of curved and dynamically flexing substrates enables flexible and stretchable applications for electrochromic films. Furthermore, the nonreactive and impermeable nature of graphene increases the durability of the device through increased resistance to external impurities. In addition, the incorporation of ferroelectric materials allows the device to exhibit nonvolatile usage; that is, devices can remain transparent with no external power source. Furthermore, devices may exhibit a charging effect, permitting recovery of energy stored in alignment of ferroelectric dipoles within the ferroelectric material.

A non-biodegradable, unitary drainage device of highly flexible character. The invention features a monolithic, sandwich construct consisting of membranous, planar top and, optional-use, bottom sheets which form a wrap / envelope or covering on a planar array of quasi-tubular supports or “stand-off ”elements. Actual positioning of the supports in their planar array is varied, with parallel-interleaving, cross-lining and intertwining of supports, of either or both embodiments, being done to acquire varying degrees of strength and flexibility. Depending on specific function to be performed, the covering sheet(s) may be of differing materials, for either particulate filtering or fluid impermeability (sealing). A connection adjunct is provided that allows direct fluid communication from support(s) of one such monolith to another.

An apparatus wherein the gas enters from an opening 4 located in a part of a compaction chamber 3 and is dragged through a granulator 5, a fractioning device 12, a special cyclone 11 and a filter system 8A to a suction fan, which creates a gas stream. In such apparatus the bulk to be compacted 1, the fine particles to be compacted again and the compacted bulk have the same flow direction than the carrier gas. Due to its complete or partial impermeability, the structure of the apparatus makes also possible the use of a gas different from normal air. This is important when the bulk is sensible to oxygen.

A laminated, bioimplantable dural graft product is configured for use as both an onlay graft and a suturable graft. The dural graft product is sufficiently pliable so as to sufficiently conform to a curvature of a tissue surface to which it is applied, such as the curved surface of a meningeal membrane. The use of the graft product can have improved properties, including suture retention strength and fluid impermeability. To use the dural graft product as an implant to replace, reinforce or strengthen bodily tissue, or to act as an adhesion barrier, the dural graft is placed in contact with bodily tissue and conforms to the curvature of the bodily tissue. Sutures can be used to maintain the contact between the dural graft and the bodily tissue.

Disclosed is an electrolyte membrane which enables a fuel cell to have a high maximum output when used therein since it has high proton conductivity and high hydrogen gas impermeability. Also disclosed are a method for producing such an electrolyte membrane, and a solid polymer fuel cell using such an electrolyte membrane. A method for producing an electrolyte membrane including a step for impregnating a porous base with a solution containing a sulfonic acid group-containing vinyl monomer and then polymerizing the monomer is characterized in that 80% by mole or more of vinyl sulfonic acid having purity of 90% or more, and / or a salt thereof is contained as the sulfonic acid group-containing vinyl monomer, and the concentration of the vinyl sulfonic acid and / or a salt thereof in the solution is set at 35% by weight or more.

A protective coating system is described that is characterized by fluid impermeability and a reduced coefficient of friction. The coating system includes a carbide-based thermal spray composition; a low friction layer; and a sealant impregnated into the low friction layer. Unlike conventional materials, the coating systems of the present invention achieve and maintain sealing surfaces, without adversely impacting lubricity, wear resistance and corrosion resistance during the service life of the coated component.

The impermeability of a test piece, e.g., a pipe made of concrete, clay, stoneware, etc., is tested using negative pressure air. Air in a compensation tank is maintained at negative pressure and also at a temperature that correspond to the temperature of the inside wall of the test piece. Then, the test piece, sealed on both ends, has a negative pressure is generated therein that corresponds to the negative pressure inside the compensation tank. Subsequently, the air inside the test piece is replaced with the temperature-controlled air from inside the compensation tank, and then the negative pressure inside the test piece is adjusted to a predetermined testing level. The progression of the negative pressure over a time period in the test piece is monitored. If the measured negative pressure drops below a prescribed tolerance limit, the pipe is considered too leaky.

An electrochemical cell comprising a lithium anode, a silver vanadium oxide cathode having a relatively lower basis weight, and an electrolyte activating the anode and the cathode is described. By limiting the amount of cathode active material per unit area (i.e. basis weight) facing the anode in the Li / SVO cell, the magnitude of the passivating film growth at the solid-electrolyte interphase (SEI) and its relative impermeability to lithium ion diffusion is reduced. Therefore, by using a cathode of a relatively low basis weight active material, it is possible to eliminate or significantly reduce undesirable irreversible Rdc growth and voltage delay in the cell and to extend its useful life in an implantable medical device.

A device for measuring permeability of a filter cartridge seal includes a blocking member for blocking an input to the filter cartridge and a housing for tightening the seal. A removable chamber wall is configured to form a sealed chamber with the housing and the blocking member. Pressure in the sealed chamber is varied to test the seal and to detect leaks.

A straight opposing member insertion section located at the end of a hose tube and has a ring-shaped groove for inserting a sealing ring. The opposing member insertion section has a ring-shaped tongue piece and / or a ring-shaped ring supporting section. Tongue-piece has a sloped surface and an overhang positioned over the ring-shaped groove. Ring supporting section is an indentation on the ring-shaped groove that protrudes away from the end of the hose tube. A sealing ring is tightly inserted into the ring-shaped groove. A ring-shaped engagement projection on the end of the tube-shaped opposing member is pushed into the opposing member insertion section until the engagement projection abuts the sealing ring. Sealing ring and the section of the tube wall with the ring-shaped groove can be constructed to handle seal deterioration. The resulting fuel hose connection structure has superior fuel sealing properties, fuel impermeability and can be contructed simplely and inexpensively.

It is provided an underground structure, usable at least as a shelter, having a light weight substantially cylindrical portion, of a cylindrical casing having a weight to area ratio in the range of 8 to 30 kg / m2. The casing has a strength level and an impermeability level high enough for serving as part a sealable underground liquid storage tank and at least one sealable opening connecting it to external spaces. The cylindrical portion includes openings for entering and exiting the interior of the portion, and passageways communicate the structure with outside spaces. The surrounding ground provides a geo-thermal reservoir which is used to regulate by a flowing fluid the temperature of the shelter space, modules inside the shelter or above ground structures. The structure includes provisions for receiving of variety of auxiliary systems like an air-treatment system, communication system water and power supply.

The present invention relates to an oil pipe having a lining imparting substantially reduced adhesion of asphaltenes, paraffin wax, and inorganic scale, so as to reduce plugging of said oil pipe, and impermeability to salt water so as to protect the oil pipe from corrosion.

The invention discloses a mobile phone encryption and decryption method based on bluetooth equipment, and aims at realizing the data and application encryption and decryption operation process of a mobile phone by relying on other bluetooth equipment (such as a smart wristband and a smart watch). The specific bluetooth equipment (such as the smart wristband or the smart watch) is required in the mobile phone encryption and decryption process and is in the connection state, or decryption cannot be performed so that privacy of data files and impenetrability of sensitive application in the mobile phone can be greatly maintained even the user's mobile phone is lost. More abundant choices are provided for the data and application encryption and decryption method in the age that smart wearable equipment is increasingly popular so that convenience and operability are high.

The present invention relates to a buffering composition, more closely a composition comprising porous matrix-enclosed buffering agent(s) giving a stabilisation of pH when applied in for example aqueous environment.The composition comprises buffering agent(s) enclosed in a first porous matrix with an impenetrability corresponding to a fractionation range for globular proteins and peptides of <10000 g / mol, preferably <5000 g / mol, more preferably <700 g / mol.

An electrochemical cell comprising a lithium anode, a cathode comprising a blank cut from a free-standing sheet of a silver vanadium oxide mixture contacted to a current collector. The active material has having a relatively lower surface area and an electrolyte activating the anode and the cathode is described. By optimizing the cathode active material surface area in a SVO-containing cell, the magnitude of the passivating film growth at the solid-electrolyte interphase (SEI) and its relative impermeability to lithium ion diffusion is reduced. Therefore, by using a cathode of an active material in a range of from about 0.2 m2 / gram to about 2.6 m2 / gram, and preferably from about 1.6 m2 / gram to about 2.4 m2 / gram, it is possible to eliminate or significantly reduce undesirable irreversible Rdc growth and voltage delay in the cell and to extend its useful life in an implantable medical device.