231 results about "Long term durability" patented technology

Biomaterials with enhanced properties such as improved strength, flexibility, durability and reduced thickness are useful in the fabrication of biomedical devices, particularly those subjected to continuous or non-continuous loads where repeated flexibility and long-term durability are required. These enhanced properties can be attributed to elevated levels of elastin, altered collagen types, and other biochemical changes which contribute to these enhanced properties. Examples of devices which would be improved by use of such tissue include heart valves, including percutaneous heart valves, and vascular grafts, patches and the like. Such enhanced materials can be sourced from specific populations of animals, such as neonatal calves, or in range-fed adult cattle, or can be fabricated or created from cell populations exhibiting such properties. In one embodiment, glutaraldehyde-fixed neonatal pericardial tissue is used to create leaflets in a percutaneous heart valve, and may be used without chemical fixation, with or without processes to remove residual cellular membranes, and utilized as a scaffold material for tissue engineering.

The invention provides methodologies and apparatus for producing acellular soft-tissue implants, both in small quantities and in commercializable quantities. Such soft-tissue implants include vascular graft substitutes. An acellular graft is produced by subjecting the tissue sample to an induced pressure mediated flow of an extracting solution, followed by inducing a pressure mediated flow of a treating solution, then washing the treated tissue to produce the acellular graft. The acellular grafts produced are uniform and non-immunogenic. The inventive method allows for the production of multiple decellularized soft tissue implants, where processing time is significantly less than prior art processes and the number of implants produced per day is increased over prior art processes. In clinical use, the decellularized grafts produced exhibit significantly improved in long-term durability and function.

A multi-layer container having a barrier property comprising a polyolefin layer and a nanocomposite blend layer is provided. The multi-layer container maintains a sufficient adhesive strength when contacting gasoline or gasohol, has good durability over a long period of time, and has superior barrier properties to gasoline and organic solvents, and thus is suitable for use in a fuel tank for vehicles.

A novel phenanthroline compound is provided which is represented by the general formula [I]:

(wherein R₁, R₂, R₃, R₄, R₅ and R₆ are the same or different and each is selected from a hydrogen atom, an unsubstituted or substituted alkyl group, an unsubstituted or substituted aralkyl group, an unsubstituted or substituted aryl group, an unsubstituted or substituted heterocyclic group, and a halogen atom; and Ar₁ and Ar₂ are the same or different and each is selected from an unsubstituted or substituted fluorenyl group, an unsubstituted or substituted fluoranthenyl group, an unsubstituted or substituted perylenyl group, and an unsubstituted or substituted carbazolyl group). An organic light emitting device using the phenanthroline compound is also provided that has a light output with a high efficiency and a high luminance and has a high long-term durability.

A cementitious board system which is reinforced on its opposed surfaces by an improved glass fiber mesh scrim with thicker yarn and larger mesh openings to provide a cementitious board with improved handling properties while retaining tensile strength and long term durability. The fabric is constructed as a mesh of high modulus strands of bundled glass fibers encapsulated by alkali and water resistant material, e.g. a thermoplastic material. The composite fabric also has suitable physical characteristics for embedment within the cement matrix of the panels or boards closely adjacent the opposed faces thereof. The fabric provides a board system with long-lasting, high strength tensile reinforcement and improved handling properties regardless of their spatial orientation during handling. Included as part of the invention are methods for making the reinforced board.

A room-temperature curable organopolysiloxane composition is provided, which includes (A) an organopolysiloxane with the terminals blocked with a hydroxyl group, a hydrolysable group, or both these types of groups, and (B) an organosilicon compound containing a hydrolysable group, a partial hydrolysis-condensation product thereof, or a mixture of the two, and (C) a polysiloxane containing an oxyalkylene group bonded to a silicon atom via, for example, a C—C—Si linkage. Application of this composition to an underwater structure is able to generate an antifouling coating that is effective in preventing the adhesion and growth of aquatic organisms on the surface of the underwater structure, and displays superior long term endurance of this antifouling effect.

The present invention provides grease which prevents frictional wear on a lubricating surface and excellent in performance of preventing occurrence of flaking, heat-resistant performance, and long-term durability, a grease-enclosed rolling bearing, a constant velocity joint, and rolling parts. Grease is composed of base grease, essentially containing a thickener, to which at least 0.01 to 15 wt % of one substance selected from among bismuth and inorganic bismuth compounds is added. The inorganic bismuth compounds are at least one inorganic bismuth selected from among bismuth sulfate, bismuth trioxide, bismuth carbonate, and sodium bismuthate. The above-described grease is used for the rolling bearing and the constant velocity joint. A coating film of at least one substance selected from among the bismuth and the inorganic bismuth is formed on surfaces of the rolling parts.

Electrode materials systems for planar solid oxide fuel cells with high electrochemical performance including anode materials that provide exceptional long-term durability when used in reducing gases and cathode materials that provide exceptional long-term durability when used in oxygen-containing gases. The cathode materials comprise zinc-doped lanthanum strontium ferrite (LSZF) or an alternative ferrite, cobaltite or nickelate ceramic electrode material. The cathode material also may comprise a mixed-conducting ceria-based electrolyte material, a palladium dopant, or a combination of these. The cathode may have a bi-layer structure. A ceramic-based interfacial layer may be provided at the electrolyte/cathode interface. The multilayer cathode system and its palladium doped cathode material exhibit a high degree of tolerance to chromium contamination during operation with metallic interconnect materials.

The invention belongs to the technical field of high-speed railway ballastless track repairing and provides a high-speed railway ballastless track line rapid repairing method in order to solve the problem that at present, a complete set of effective, rapid and systematic repairing method is not available for existing high-speed railway ballastless track lines. The high-speed railway ballastless track line rapid repairing method comprises the steps of line-to-line physical isolator installation, track sawing and moving, integral concrete track bed cutting and transporting, subgrade bed surface layer graded broken stone measurement leveling, supporting layer construction, track bed slab construction, steel track welding locking, track fine adjustment, road shoulder waterproof and drainage engineering and related engineering installation; line-to-line physical isolator demolition, line-to-line sealing layer and related engineering recovery, steel track polishing derusting, line-to-line waterproof construction, and drainage side ditch and side ditch platform recovery construction. Implementation is easy, and the high-speed driving requirement is met after repairing; the repairing and reinforcement effect is good, and the situation that a problem happens again to a ballastless track is effectively prevented; and the high-speed railway ballastless track is efficiently, rapidly, completely, systematically and comprehensively repaired and maintained, so that the safety of railway operation and the long-term durability of the structure of the ballastless track are ensured.

The invention relates to flame retardant systems including the brominated flame retardants and chlorinated flame retardants with synergists and char formers for use in wood-filled resins in combination with compatibilizers to enhance physical properties and to increase water extraction resistance and long term durability. Desirable embodiments of the invention relate to brominated and chlorinated flame retardant additives, synergists, and char formers for use in resins, including polyolefins, fillers, wood-filled polyolefins, in combination with compatibilizers and methods of use of the flame retardants and fillers. The invention includes methods of making and using the composition.

A multilayer construction for aerodynamic riblets includes a first layer composed of a material with protuberances, the first layer material exhibiting a first characteristic having long-term durability and a second layer composed of a material, exhibiting a second characteristic with capability for adherence to a surface.

Disclosed is a device for sensing the opening degree of a valve, which can easily determine the upper and lower limits without using upper and lower limit switches so that, besides simplifying the mechanical structure, the device can be easily installed, maintained, and repaired. The device can avoid basic errors and improve the opening degree sensing performance without using upper and lower limit switches, cams, and a spline so that, by simplifying the mechanical structure, the device can be manufactured, installed, maintained, and repaired at a low cost, and its long-term durability is improved. The device has a main gear adapted to disengage from the meter gear when the main gear is rotated excessively so that any damage to the meter gear and potentiometer, which may occur during installation or use, is prevented.

There is provided an actuator element which can be driven at low voltages, is operated stably in air and in vacuo with a quick response, exhibits a large degree of displacement and a large displacement force, has high mechanical strength including flexibility, thus giving long-term durability for repeated use, can be produced by a very simple method, can be formed into a small size because of a simple structure, and can be put into practical use in wide applications. The actuator element is comprised of an ion-conducting layer for an actuator element comprising (I) a fluorine-containing polymer having functional group and (II) an ionic liquid, in which the fluorine-containing polymer having functional group is a polymer having functional group selected from the group consisting of —OH, —COOH, —COOR, —CN, iodine atom, epoxy group and (meth)acryloyl group in a polymer side chain and/or at an end of a polymer trunk chain, and an electrode layer comprising (I) the fluorine-containing polymer having functional group, (II) an ionic liquid and (III) an electroconductive nano-filler.

A hose coupling using at least one reinforcing ring to reinforce a hose coupling during a crimping process, the hose coupling having an inner sleeve, an outer sleeve coaxial with the inner sleeve, and a hose coaxially interposed therebetween. During the crimping process a crimping force is applied directly to the outer sleeve to form at least one depression that results in an area of peak crimp force on the inner sleeve, the depression helping to seal and lock the hose between the inner and outer sleeves. The reinforcing ring is positioned within the inner sleeve and concentric with the area of peak crimp force on the inner sleeve. Consequently, the reinforcing ring prevents the inner sleeve from deforming under the crimping force, thereby ensuring the integrity and long-term durability of the hose coupling. The reinforcing ring preferably has an inside diameter equal to or greater than an inside diameter of the inner sleeve and is disposed within at least one groove located within the inner sleeve to permit unrestricted fluid flow through the hose coupling.

The invention provides methodologies and apparatus for producing devitalized soft-tissue implants where the implant retains metabolically non-viable and/or reproductively non-viable cells, and preferably retains large molecular weight cytoplasmic proteins, such implants produced both in small quantities and in commercializable quantities. Such soft-tissue implants include vascular graft substitutes. A devitalized graft is produced by subjecting the tissue sample to an induced pressure mediated flow of an extracting solution, optionally followed by inducing a pressure mediated flow of a salt solution, then washing the tissue to produce the devitalized graft. The devitalized grafts produced are uniform and non-immunogenic. The inventive method allows for the production of multiple devitalized soft tissue implants, where processing time is significantly less than prior art processes and the number of implants produced per day is increased over prior art processes. In clinical use, the devitalized grafts produced exhibit significantly improved in long-term durability and function, and enhanced recellularization post-implantation.

Thermally deformable face seals and respirators including such face seals. The thermally deformable face seal structures comprise composite phase change materials that mold to the face of a user to provide a personalized but one-size-fits-all facial fit having excellent shape retention after use and long term durability. The phase change material is applied onto a base component to cover all or substantially all of the surface area of the base component and adapts to the face of the user to provide a secure, leak-free seal.

The present invention relates to a composite core material for a vacuum insulation panel which exhibits excellent initial insulation and long-term durability, a method of manufacturing the same, and a vacuum insulation panel using the same. The vacuum insulation panel includes a composite core material formed of glass fiber wool and a glass fiber board, and an outer skin material having a layered structure comprising a surface protective layer, a metal barrier layer, and a bonding layer from the outside to vacuum-package the core material.

The present invention provides a grease capable of preventing wear on a lubricated surface, excellent in deflection prevention performance, heat resistance, and long-term durability, and a rolling bearing, a constant velocity coupling, and a rotating part filled with the grease. The grease is prepared by adding at least one substance selected from bismuth and inorganic bismuth in an amount of 0.01 to 15% by weight relative to the total amount of grease to a base grease prepared by blending at least a thickener with a base oil. Inorganic bismuth is at least one inorganic bismuth selected from bismuth sulfate, bismuth trioxide, bismuth carbonate and sodium bismuthate, the above-mentioned grease is used for rolling bearings and constant velocity couplings, and the rotating parts are formed on their surfaces selected from bismuth and inorganic bismuth A coating of at least one substance.

Provided is an encapsulant for a solar cell which is highly anticorrosive and can form a solar cell module with a long life. Also provided is an interlayer film for laminated glass, which is highly anticorrosive and can form a laminated glass with long-term durability. The encapsulant for a solar cell or the interlayer film for laminated glass includes a material having a polyvinyl acetal content of 40% by mass or more and a chlorine content of 25 ppm or less and having a plasticizer content of 10 parts by mass or less based on 100 parts by mass of polyvinyl acetal.

The invention discloses fly ash cement comprising the following components in parts by weight: 30-40 parts of fly ashes, 53-65 parts of portland cement clinkers, 2-5 parts of dihydrate gypsum, 0.5-2 parts of excitants, 1-2 parts of active agents, 1.5-3 parts of early strength agents, 5-10 parts of lime, 6-12 parts of calcium-added slag and 15-25 parts of red mud. The fly ash cement disclosed by the invention can be used for also solving the problems of low early strength and long setting time, and the problem that later strength is still high besides that the fly ash cement has the excellent characteristics that the common flash ash cement is small in pollution, low in hydration heat, good in alkali-aggregate reaction resistance, sulfate corrosion resistance, dry shrinkage resistance, stability and the like, and especially, the excitants disclosed by the invention do not contain the substances such as sulfate, chloridion and the like, so that the latent instability of long-term durability of the cement and the concrete is effectively avoided, and meanwhile, the cost is greatly reduced due to adding of a lot of fly ashes and other slag. The obtained cement is extremely high in compressive strength, exceeds 40MPa after three days, and exceeds 70MPa after 28 days.

A nitride semiconductor light emitting device and a method of manufacturing the same are disclosed. The nitride semiconductor light emitting device includes an n-type nitride layer; an active layer formed on the n-type nitride layer; a p-type nitride layer formed on the active layer; a current blocking pattern formed on the p-type nitride layer; a transparent conductive pattern formed to cover upper sides of the p-type nitride layer and the current blocking pattern, and having a contact hole through which a portion of the current blocking pattern is exposed; and a p-electrode pad formed on the current blocking pattern and the transparent conductive pattern, and directly connected to the current blocking pattern. The nitride semiconductor light emitting device can improve long term durability by securing excellent light scattering properties while enhancing adhesion of a p-electrode pad.