Matches 301 - 350 out of 510 < 1 2 3 4 5 6 7 8 9 10 11 >
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5389350 Gas separation using adsorbent activated carbonized polyarylamides  
Novel polyarylamide derived activated carbon materials are provided by a process comprising the carbonization of polyarylamide fibre at a temperature in excess or 400° C. followed by activation at...
5336557 Carbon fiber felting material and process for producing the same  
The disclosed carbon fiber felting material has a bulk density of 0.01 to 0.5 g/cm 3 and a thermal conductivity of at most 1.0 kcal/mhr°C. in the thickness-wise direction thereof at 2,200°...
5334419 Method of sizing carbon fibers  
A method of sizing carbon fibers includes processing the carbon fibers with a water-based emulsion of sizing agents containing specified kinds of ester compound and non-ionic surfactant...
5316654 Processes for the manufacture of enriched pitches and carbon fibers  
There are provided improved processes for the manufacture of enriched pitches, carbon fiber precursors, carbon fibers, and graphite fibers. The improvement comprises employing an elevated...
5308599 Process for producing pitch-based carbon fiber  
There is disclosed a process for producing pitch-based carbon fiber which comprises melt spinning an optically isotropic pitch or a mesophase pitch to form pitch fiber; subjecting the pitch fiber...
5308598 Plexifilamentary fibers from pitch  
A process is provided for flash-spinning plexifilamentary fiber from pitch. The fibers can be stabilized and graphitized. The flash-spinning requires polyethylene amounting to 0.3 to 3.5% of the...
5292408 Pitch-based high-modulus carbon fibers and method of producing same  
The present invention provides an improvement in the process of producing pitch-based carbon fibers comprising the steps of spinning a spinnable pitch, treating the resulting pitch fibers for...
5283113 Process for producing carbon fiber felt  
There is disclosed a process for continuously producing a pitch-based carbon fiber felt which comprises the steps of spinning a pitch by melt blow spinning system; accumulating the spun fibers as a...
5281477 Carbon fibers having high tenacity and high modulus of elasticity and process for producing the same  
A carbon fiber of a high tenacity and a high modulus of elasticity having a fiber diameter of 1 to 6 μm, a strand tenacity of 430 kg/mm 2 or more, a strand modulus of elasticity of 28 ton/mm 2 ...
5277973 Carbon fibers having high strength and high modulus of elasticity and polymer composition for their production  
Silicon-containing carbide fibers having high strength and modulus of elasticity, and polymer compositions for production thereof. These fibrers are inexpensive and very useful as reinforcing...
5272004 Carbon fibers and process for producing the same  
Pitch-based carbon fiber having from 2 to 200 twists per 1 cm length or from 2 to 200 twists per 1 cm length and curls are provided. These fibers show superior properties as carbon fibers useful...
5268158 High modulus pan-based carbon fiber  
Novel carbon fiber in the form of a plurality of tows or bundles comprising a multitude of continuous filaments is disclosed. The novelty of the carbon fiber resides in its unique combination of...
5266294 Continuous, ultrahigh modulus carbon fiber  
High modulus, pitch-based, continuous carbon fiber having a density above about 2.18 g/cc and an electrical resistivity below about 1.6 micro-ohm-meter, and a method for making.
5264162 Process for manufacturing porous tubes of high permeability made from carbon-carbon composite material, and their application  
A process for manufacturing porous tubes made from carbon-carbon composite material by winding over a mandrel a non-woven sheet, made from a carbon fiber precursor, followed by compression and hot...
5232772 Low density carbonized composite foams  
A carbonized composite foam having a density less than about 50 mg/cm 3 and individual cell sizes no greater than about 1 μm in diameter is described, and the process of making it.
5229202 Carbon fiber and carbon fiber-reinforced resin composition using it  
A carbon fiber having its surface coated with a copolymer composed of a diamine compound, a dicarboxylic acid compound and a glycidyl polyalkylene oxide derivative of the following formula (I),...
5227237 Noncircular cross-section carbon fiber, process for producing the same and composite of the carbon fiber with resin  
A noncircular cross-section carbon fiber wherein the cross-section is a noncircular one having at least one plane of symmetry passing the centroid and having an angle of rotational symmetry, θ,...
5217701 Process for producing carbon materials  
Disclosed is a process for producing carbon materials which comprises the steps of preparing a raw material composition by mixing a methylene type linkage-containing condensation product of an...
5215651 Process for producing coke  
A process for producing coke, which comprises uniformly dispersing and mixing a carbonized product having an average aspect ratio of at least 1.5 to a starting material oil and then coking the...
5209975 High elongation, high strength pitch-type carbon fiber  
The present invention relates to a high elongation, high strength pitch-type carbon fiber which has an improved handleability. The carbon fiber of this invention has a crystalline structure...
5204030 Method for producing pitch-type carbon fiber  
A method for producing pitch-type carbon fiber, comprising the steps of discharging, from a spinning nozzle, a spinning pitch comprising an optically isotropic pitch and/or optically anisotropic...
5188894 Composite carbon fiber and process for preparing same  
Disclosed herein is curled or uncurled composite carbon fiber which comprises part of optically isotropic carbon fiber and balance of optically anisotropic one and a process for preparing the same....
RE34162 Controlled surface electrical resistance carbon fiber sheet product  
A method of manufacturing controlled surface electrical resistivity carbon fiber sheet products employing a carbonizable starting material, heating and drawing the starting material (if...
5172307 Activated carbon/polyacene composite and process for producing the same  
An activated carbon/polyacene composite is disclosed. The composite contains activated carbon powder or fiber and having a selected molar ratio range of hydrogen atoms [H] to carbon atoms [C] of...
5169616 High thermal conductivity carbon fibers  
High thermal conductivity mesophase pitch based carbon fibers are made using a spinneret which has a sharply angled tapered region at the inlet to the spinneret capillary.
5168004 Melt-spun acrylic fibers possessing a highly uniform internal structure which are particularly suited for thermal conversion to quality carbon fibers  
An acrylic multifilamentary material possessing an internal structure which is particularly suited for thermal conversion to high strength carbon fibers is formed via a specifically defined...
5167945 Method for producing graphite fiber  
A method for producing graphite fiber comprising graphitizing carbon fiber having a strength of 500 kgf/mm 2 or more and a modulus of elasticity of from 27,000 to 33,000 kgf/mm 2 , and having at...
5165909 Carbon fibrils and method for producing same  
The invention relates to carbon fibrils characterized by a substantially constant diameter, length greater than about 5 times the diameter, an ordered outer region of catalytically grown, multiple,...
5156831 Method for producing high strength, melt spun carbon fibers  
Hollow carbon fibers and carbon fibers having a generally C-shaped transverse cross-sectional area are produced by extruding a carbonaceous anisotropic liquid precursor through a spinneret having a...
5154908 Carbon fibers and method for producing same  
Carbon fibers having a multi-lobal transverse cross-section are produced by extruding a carbonaceous anisotropic liquid precursor through a spinneret having a capillary with a multi-lobal...
5149517 High strength, melt spun carbon fibers and method for producing same  
Hollow carbon fibers and carbon fibers having a generally C-shaped transverse cross-sectional area are produced by extruding a carbonaceous anisotropic liquid precursor through a spinneret having a...
5124856 Magnetic recording device with unitary filter medium to trap organic and inorganic chemical pollutants  
A chemical filter assembly mounted in a breather opening in a housing for a magnetic storage device or other device to permit pressure equalization with the surrounding environment comprises at...
5114697 High strength, high modulus pitch-based carbon fiber  
A high strength, high modulus pitch-based carbon fiber has a crystalline structure in which the presence of the (112) cross-lattice line and the resolution of the diffraction band into the (100)...
H001052 Method for stabilization of pan-based carbon fibers  
Polyacrylonitrile (PAN) based fibers are stabilized by heating them in an atmosphere containing oxygen and ammonia from room temperature to 150°-350° C., prior to carbonization and...
5108458 Sizing agent for carbon fiber  
This invention provides a sizing agent for carbon fiber which contains an isocyanate regenerating compound which is an isocyanate compound, the --NCO group of which is stabilized with a blocking...
5108830 Shape-stable reentry body nose tip  
A reentry body nose tip constructed from materials and produced by a proc such that shape stability is maintained under ablative erosion occurring during atmospheric reentry.
5098688 Carbon fibres  
Polyacrylonitrile (PAN)-based carbon fiber in the form of a filament bundle has a high Modulus and a high Tensile Strength in the Impregnated Strand Test respectively between about 42 million and...
5075160 Ceramic fiber reinforced filter  
A filter for removing particulate matter from high temperature flowing fluids, and in particular gases, that is reinforced with ceramic fibers. The filter has a ceramic base fiber material in the...
5057341 Method of processing carbon fiber precursor from pitchy materials  
Carbon fiber precursors from pitchy materials are processed by applying thereonto an aqueous emulsion containing a single silicone oil or a mixture of silicone oils selected from polydimethyl...
5047292 Pitch-based carbon fiber and process for preparation thereof  
A pitch-based carbon fiber having a microstructure consisting of strip-like structural units extended in the longitudinal direction of the fiber, wherein the fractal dimension D of the arrangement...
5045299 Manufacturing method of carbon fiber reinforced compound materials  
In place of mechanical complicated pressure means which apply a pressure upon binder impregnated carbon fibers when they are heated to be a compounded compact of a desired shape, thermo-resistant...
5034267 Carbonaceous fiber or fiber assembly with inorganic coating  
A thermally stable metal coated carbonaceous fiber batting, fiber tow, yarn or fabric which maintains loft, has some degree of resiliency and some degree of stability in the presence of various...
5030435 Process for producing chopped strand of carbon fiber  
The present invention relates to a process for producing a carbon fiber chopped strand which comprises preparing a pitch fiber from petroleum pitch or coal pitch, cutting the pitch fiber to a...
5023230 Oxide superconductors encased in pan-derived carbon matrix  
Disclosed is a method of preparing a superconductor wherein a precursor oxide mixture is dispersed in an appropriate polymer matrix and shaped into a predetermined form following which the matrix...
5021107 Process for joining or coating carbon-carbon composite components  
A process for joining or coating carbon-carbon composite components. For joining such components, surfaces of two components are prepared so that they match. An interlayer comprised of a material...
5004511 Process for producing non-woven fabrics of carbon fibers  
A process is provided for producing non-woven fabrics in which adhered points supporting the non-woven fabrics structure are the same carbon materials with the component fibers and which is...
5004590 Carbon fibers  
Polyacrylonitrile (PAN)-based carbon fiber in the form of a filament bundle has a high Modulus and a high Tensile Strength in the Impregnated Strand Test respectively between about 42 million and...
4996037 Processes for the manufacture of enriched pitches and carbon fibers  
There are provided improved processes for the manufacture of enriched pitches, carbon fiber precursors, carbon fibers, and graphite fibers. The improvement comprises employing an elevated...
4990285 Balanced ultra-high modulus and high tensile strength carbon fibers  
Carbon fibers having balanced properties comprising an ultra-high modulus greater than 100 Mpsi and a high tensile strength of greater than 500 kpsi. The carbon fibers are derived from a solvent...
4988492 Method for infusibilizing pitch fibers  
This invention provides a method for infusibilization of pitch fibers for production of carbon fibers which comprises putting pitch fibers prepared by melt spinning from a spinning pitch in...
Matches 301 - 350 out of 510 < 1 2 3 4 5 6 7 8 9 10 11 >