Matches 201 - 250 out of 360 < 1 2 3 4 5 6 7 8 >
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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...
5330680 Foliated fine graphite particles and method for preparing same  
This invention relates to a method for preparing fine graphite particles which can be used as a highly functional graphite material in wide applications. According to this method, foliated fine...
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...
5306563 High-performance C/C composite  
A C/C composite including a carbon matrix and carbon fibers and exhibiting a crystal structure of the carbon matrix differing between (a) the portion at and in the vicinity of the interface between...
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.
5246639 Method for producing carbon-carbon composite materials  
A method for producing high density, high strength carbon-carbon composite material, is provided by using pitch-based carbonaceous fibers carbonized at a temperature lower than 2200° C. or...
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.
5230960 Activated carbon fiber structure and process for producing the same  
An activated and heat-treated product of a pitch fiber (A) is combined with an activated and heat-treated product of a precursor fiber of carbon fiber (B) having a larger elongation and a larger...
5227238 Carbon fiber chopped strands and method of production thereof  
A carbon fiber chopped strands suitable for use in production of a composite with a matrix material, which have a circular or elliptical cross-section, wherein carbon fiber filaments are bundled by...
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,...
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...
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...
5171560 Carbon fibrils, method for producing same, and encapsulated catalyst  
A process for preparing carbon fibrils using discrete, unfused, metal-containing catalytic particles encapsulated in non-graphitic carbon, a carbide, or an organic polymer.
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...
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...
5152941 High-density vitreous carbon material and process for producing the same  
The present invention relates to a high-density vitreous carbon material having heat resistance, chemical resistance and no liquid and gas permeability, used in various industries, as well as to a...
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...
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.
5106606 Fluorinated graphite fibers and method of manufacturing them  
Fluorinated graphite fibers comprising an intercalated compound of graphite fibers, having a three-dimensional crystal structure in which carbon hexagonal network faces are substantially in...
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...
5093214 Thin carbon plate suitable for use as fuel cell separator  
A thin carbon plate obtained by forming a polycarbodiimide resin or a mixture of a polycarbodiimide resin and polycarbodiimide fibers into a thin plate and carbonizing the thin plate. This thin...
5076845 Process for producing formed carbon products  
The present invention discloses a process for producing a formed carbon products which comprises the steps of mixing a pitch or a pitch precursor and at least one kind of polymer becoming...
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...
5073412 Method of intercalating large quantities of fibrous structures  
A method of intercalating large quantities of fibrous structures uses a rotatable reaction chamber containing a liquid phase intercalate. The intercalate liquid phase is controlled by appropriately...
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...
5037697 Carbon fiber and process for producing the same  
The present invention relates to a carbon fiber having a novel structure in which the outer circumferential part of fiber section is constituted of an optically isotropic component and its central...
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...
H000907 Process for producing conductive graphite fiber  
A process for producing a graphite fiber is disclosed, which is characterized by using, as a starting material, an optically anisotropic pitch prepared from a compound having a specific chemical...
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...
RE33537 Ultrahigh strength carbon fibers  
An ultrahigh strength carbon fiber having a surface layer having a crystalline completeness which is substantially the same as or higher than that of the central region of the fiber, and a...
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...
4983457 High strength, ultra high modulus carbon fiber  
A high strength, ultra high modulus carbon fiber is characterized by the presence of the (112) cross-lattice line and the resolution of the diffraction band into two distinct lines (100) and (101),...
4981752 Formation of melt-spun acrylic fibers which are well suited for thermal conversion to high strength carbon fibers  
An acrylic multifilamentary material possessing an internal structure which is well suited for thermal conversion to high strength carbon fibers is formed via a specifically defined combination of...
4981751 Melt-spun acrylic fibers which are particularly suited for thermal conversion to high strength 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...
4977023 Elastic carbon fibers  
A fiber made of pitch is disclosed. In the preferred and illustrated embodiment, the fiber has a percent elongation of about 2 percent or greater. This fiber is made by melt spinning an optically...
4975262 Three dimensional woven fabrics of pitch-derived carbon fibers  
Three dimensional woven fabrics containing bent parts of a small radius of curvature which bent parts comprise easily graphitized pitch-derived carbon fibers obtained by thermosetting treatment and...
4970123 Isotropically reinforced net-shape microcomposites  
A novel isotropically reinforced microcomposite is described. An entirely fluid-phase method has been devised for producing the net-shape filamentary structures. The process depends for its success...
Matches 201 - 250 out of 360 < 1 2 3 4 5 6 7 8 >