Abstract: A static dissipative laminate consistently having an internal resistance less than 2.times.10.sup.6 and a resistance to ground measurement of about 5.times.10.sup.6 and a surface resistance in the static dissipative range even at a very low humidities is produced by the use of an ionic salt and an humectant in the overlay and further by the use of a special top core sheet containing 0.6-1.0% by weight of carbon fibers.

Abstract: A decorative static dissipative high pressure laminate having a plurality of consolidated thermosetting resin impregnated layers including a core and a decor surface layer to provide a surface resistance no greater than 2.times.10.sup.9. The core comprises at least one thermosetting resin impregnated paper core sheet and at least one special thermosetting resin impregnated core sheet of predominately paper fibers and a small quantity of stainless steel fibers irregularly distributed among the paper fibers.

Abstract: A fundamentally new papermaking process for the manufacture of paper, board and other wet-laid products on a paper machine under conditions ranging from acidic to alkaline from aqueous furnishes treated with in-situ-synthesized complex functional microgels.

Abstract: Electrically conductive polymeric materials, having microwave susceptive characteristics, are produced by suspending a fibrous based material and a monomer precursor of a conductive polymer in an aqueous solution. Addition of a chemical oxidant induces polymerization of the monomer resulting in coating of the fibrous based material. The invention provides a susceptor material useful for cooking food items in a microwave oven, and enhances the browning and/or crispening of the items. Conductive polymer coated fibrous based materials can be formed into a paper product by conventional papermaking techniques or molded into an integral structures having microwave interactive properties.

Abstract: An anti-static paper sheet for use in high pressure laminates comprised of Pontiac hardwood, high alpha hardwood, and cotton linters, the sheet being initially treated with a wet strength resin and saturated with a water soluble polycationic quaternary ammonium polymer which is free from metallic salts in an amount of at least about one pound of polymer to 1000 square feet of sheet material having a basis weight of about 75 pounds per ream, the anti-static polymer being applied at a temperature of from about 135.degree. F. to about 155.degree. F.

Abstract: Substrates for electrode systems, particularly those to be used for bipolar electrodes in zinc-bromine batteries, are disclosed. The substrates preferably include carbon-black as a conductive filler in a polymeric matrix, with reinforcing materials such as glass fibers. Warpage of the zinc-bromine electrodes which was experienced in the prior art and which was believed to be caused by physical expansion of the electrodes due to bromine absorption by the carbon-black, is substantially eliminated when new substrate fabrication techniques are employed. In the pesent invention, substrates are prepared using a lamination process known as glass mat reinforced thermoplastics technology or, in an alternate embodiment, the substrate is made using a slurry process.

Abstract: Capacitor grade dielectric tissue and electrolytic separator paper are manufactured on a papermaking machine from flash-spun pulp fibers of a synthetic resin such as polypropylene. The flash-spun synthetic pulp fibers are highly fibrillated and microporous and may be combined with unbleached sulfate woodpulp fibers to produce highly absorbent capacitor tissue and separator paper having chemical, physical and electrical properties which conform to all the essential requirements prescribed by ASTM standards.

Abstract: Magnetic paper-forming fibers have a particulate magnetic material incorporated within the fibers, as distinct from between the fibers; this can be achieved by loading the lumens of cellulosic fibers with magnetic particles or by generating magnetic particles in situ in a paper-forming fiber which contains ionic groups effective for ion exchange with ferrous ions; the fibers can be employed to produce single layer or multi-layererd magnetic papers for information storage, security paper applications, paper handling, reprographic applications such as magnetographic printing substrate as well as for speciality uses such as electromagnetic shielding, magnetic separation of antibodies based on selective adsorption.

Abstract: Microporous composites adopted for electrolytic applications, e.g., as cathodes in the electrolysis of sodium chloride, are comprised of a regular, homogeneous and consolidated microporous deposit of monodispersed carbon fibers on a perforated rigid support substrate therefor, said carbon fibers having a distribution by length such that the mean length of at least 80% of the individual fibers, plus or minus 20%, corresponds to the mean length of said fibers.

Abstract: An insulating polyolefin laminate paper and a method for producing such a paper in which first and second fiber paper layers are laminated to a polyolefin film layer. The fiber paper layers have an impermeability of 20 to 4000 Gurley-seconds. At least one of the fiber paper layers is mechanically deformed in such a manner that irregularities are produced having a depth of 2 to 50% of the thickness of the fiber paper layer. The mechanical deformation is accomplished prior to lamination. Before lamination, the water content of the fiber paper layers is controlled to be no more than 4%. Preferably, the thickness of the fiber paper layers is at least 30 microns. Furthermore, an electric power supply cable includes an insulating polyolefin laminate paper as an insulating layer.

Abstract: A process for making a paper product that includes both means for preventing images from being copied from the paper product by use of a xerographic photocopier; and means for enabling detection of the paper product when the paper product is transported through an interrogation zone of an article surveillance system.

Abstract: Provided by the present invention is a novel magnetic barrier paper comprised of low hysteresis iron powder. Preferably, the iron powder employed has a hysteresis value of not more than about 5 parts per thousand. The magnetic barrier paper of the present invention is particularly applicable to the protection of floppy disks, as well as electronic components, from stray magnetic fields.

Abstract: The present invention provides a multilayer fibrous material suitable for use as an EMI and RFI shielding packaging material and a process for producing the same comprising first and second outer layers formed of paper or paperboard and an inner layer formed of paper or paperboard containing conductive carbon. The invention also provides a method of providing antistatic properties to the packaging material.

Abstract: A composition is described which is prepared so that it has a low electrical resistivity so that it can be used in electrostatic discharge operations. The composition includes carbon-coated fibers. The fiber is characterized in that it is a Lewis base while the carbon powder is a Lewis acid. The carbon-coated fiber is held together with a binder (such as a latex or resin). The binder may be either neutral or acidic. A resin can also be used to prepare rigid electrostatic discharge objects. When a resin is used, the resin should also be neutral and preferably, is acidic.

Abstract: A process for making a high heat resistant oil-impregnatable insulating board, having a dielectric constant less than 2.7, made from bleached polytetrafluoroethylene floc and aromatic polyamide fibrids and the resulting insulating board are disclosed.

Abstract: An electrostatic recording material which comprises a support coated in sequence with a conductive layer and a recording layer composed of a dielectric resin and a pigment, wherein at least a part of the pigment component in said recording layer is made of an aluminum hydroxide powder having an average particle size of 1-20 .mu.m is disclosed.

Abstract: A paper product includes both means for preventing images from being copied from the paper product by use of a xerographic photocopier; and means for enabling detection of the paper product when the paper product is transported through an interrogation zone of an article surveillance system.

Abstract: The present invention resides in an envelope type separator for a storage battery and the manufacturing process thereof. The separator sheet is comprised of a first, microporous paper layer made of an inorganic powder material, a synthetic organic fiber material and an organic binder, and a second, coarse paper layer made of a synthetic organic fiber material and an organic binder, but no inorganic powder material, these layers being bound together by heating. The resultant separator sheet of combination paper type is then formed so that the mutually inward surfaces of the coarse paper layer are brought into contact with each other and are made to adhere to each other, preferably at the edges, by thermal fusion, so that the separator sheet is formed into the shape of an envelope process for making an envelope type separator sheet is also described.

Abstract: The filter paper according to the invention is characterised in that it contains electrically conductive fibers which render it electrically conductive and able to allow the heating of the fluid to be filtered by the Joule effect. According to a particularly advantageous application, this paper may be used in filters for fuel supply circuits in diesel engines, in order to prevent the blockage of such filters at low temperatures as a result of the freezing of paraffin contained in the fuel.

Abstract: Processes for the production of antistatic or static dissipative papers. The papers produced may be expeditiously used in dunnage converter machines operable to produce an antistatic (static dissipative) resilient pad-like cushioning dunnage product, for packaging and the like. In one of the processes, liquid antistatic material is applied to a still wet porous paper web produced on a Fourdrinier-type paper making machine, and in predetermined amount for impregnation therein, prior to the completion of the drying of the paper. In another process, a web of dry paper is impregnated with liquid antistatic material, and then the treated web is dried.

Abstract: Substrate composites, well adopted for the production of metallized printed circuits and facilely prepared by, e.g., papermaking procedures, include a central core layer comprising fibrous cellulosic material or flaked mica within a matrix of a thermosetting resin binder, said central core element having coextensively laminated to at least one of the face surfaces thereof, a lamina of a thermosetting resin comprising non-conductive metal oxide filler material distributed therethrough, and said metal oxide being borohydride reduceable and reactive to form unstable metal hydride intermediates.

Abstract: In an electrostatic recording material being composed of a multi-layered sheet support having an electroconductive layer and a dielectric layer formed successively thereon, the number of projections having a height of 10 .mu.m or more from the flat surface is limited to a maximum of 50 per 0.1 m.sup.2, so that the material has excellent properties and can produce prints of very high quality.

Abstract: A heat conductive circuit board includes an insulating layer provided on a metal substrate, and an electrically conductive metal foil formed on the insulating layer, and the insulating layer is formed by impregnating an alumina paper with organic polymer. The alumina paper is made by subjecting a material containing alumina fiber as the principal components to a paper-making process. The insulating layer has excellent properties of heat transfer not only in the thickness direction but also in the surface direction, and thus, the heat conductive circuit board is excellent in heat dissipation properties.

Abstract: An electrophotographic image transfer paper for a copier including a fixing operation, comprises a sheet of raw paper, and a receiving layer on the paper for reducing blistering of the sheet during fixing of an image on the sheet, the receiving layer including a coating on at least one side of the sheet, having a center-line-average surface roughness not more than 2.0 micrometer and an air permeability less than or equal to 4,000 seconds.

Abstract: An electrostatic recording material comprising a substrate treated for low electric resistance and a dielectric layer formed on the substrate and composed of a composition comprising an insulating resin having a volume specific resistance of at least 10.sup.12 .OMEGA.cm and a powder of an acrylonitrile-type polymer having a copolymerized acrylonitrile content of at least 95% by weight and containing substantially no ionic groups, said powder having a volume average particle size of from 1.5 to 4 .mu.m and a content of particles having a size exceeding 8 .mu.m as measured by a particle size distribution measuring apparatus, being at most 0.02% by number.

Abstract: High temperature resistant pressboard having a desirable combination of compression set values and oil absorption is prepared by a process whereby a low density pressboard is first prepared by forming a wet lap of multiple layers of a waterleaf containing 50-95% by weight water and pressing the wet lap at 100-200.degree. C. under a pressure of 10-60 kg/cm.sup.2, drying, ultimately at 270.degree.-320.degree. C. until substantially no further moisture is evolved and finally pressing at 270.degree.-320.degree. C. under a pressure of 8-350 kg/cm.sup.2 and optionally cooling under restraint.

Abstract: A polarizable electrode body which has as a constituting member a paper-type body having activated carbon fiber and a fibrous binding medium as its composition, and also a electric double-layer capacitor having the polarizable electrode body as its constituting member. In comparison with a conventional simple polarizable electrode body of activated carbon fiber fabric, higher integration can be made and charged electric charge per unit volume can be increased, and the electric charge to be stored in the polarizable electrode body can be easily adjusted.

Abstract: A method of manufacturing controlled electrical resistivity carbon fiber sheet products employing a carbonizable starting material, heating and drawing the starting material (if required,) oxidizing the starting material at an elevated temperature of the order of 220 degrees Centigrade to effect molecular aromatic rearrangement of the starting material, carbonizing the oxidized starting material at an elevated temperature in an oxygen free atmosphere within a furnace having an elevated temperature extending over a temperature range to about 1400 degrees Centigrade by soaking the starting material at an elevated temperature for a predetermined period of time to provide a preselected electrical resistivity to the carbonized material. The carbonized material thus treated is formed into end carbon fiber sheet products having the form of paper, woven fabric and the like having a desired electrical resistivity. The starting carbonizable material consists essentially of PAN.

Abstract: A method of continuously manufacturing thin porous conductive strips, the strips including at least one layer based on a substance which contains carbon and a binder, the method comprising the successive steps of:preparing a very dilute aqueous dispersion of carbon or graphite fibers;adding an aqueous binder emulsion to the dispersion;initiating precipitation of a part of the binder onto the fibers;spreading the mixture in the form of a layer (1,2);removing at least some of the water from the mixture (3);drying the mixture (4,5,6,7); andsetting the layer to the required thickness (8) which may be less than a few tens of microns.

Abstract: Antistatic cartons of containerboard having 0.3 to 3.5 percent by weight conductive carbon for protecting electrostatic discharge sensitive devices. The containerboard is made from an alkaline pulp which eliminates acid contamination, increases shelf life, provides Mullen burst strength in the linerboard which exceeds 90(.+-.1) pounds per square inch. The surface resistivity is in the range of from 10.sup.3 to 10.sup.9 ohms per square. The carton includes conductive adhesives to insure dissipation of any static charges.

Abstract: A method for printing by magnetography under atmospheric conditions of relative humidity exceeding 65 or even 75% consists in transferring to a sheet of paper a fusible magnetic ink in powdered form which is distributed on a temporary magnetizable support in accordance with the configuration to be produced, whereupon the ink is fixed by fusion on the sheet of paper. The paper has a surface resistivity of at least 10.sup.10 ohms square and a relative smoothness of at least 20 Bekk.

Abstract: An insulating polyolefin laminate paper and a method for producing such a paper in which first and second fiber paper layers are laminated to a polyolefin film layer. The fiber paper layers have an impermeability of 20 to 4000 Gurley-seconds. At least one of the fiber paper layers is mechanically deformed in such a manner that irregularities are produced having a depth of 2 to 50% of the thickness of the fiber paper layer. The mechanical deformation is accomplished prior to lamination. Before lamination, the water content of the fiber paper layers is controlled to be no more than 4%. Preferably, the thickness of the fiber paper layers is at least 30 microns. Furthermore, an electric power supply cable includes an insulating polyolefin laminate paper as an insulating layer.

Abstract: A process for the production of a laminated sheet is disclosed, which comprises impregnating a base paper for laminated sheet using a wood pulp having an .alpha.-cellulose content of 87.0% or more with a synthetic resin to prepare a prepreg and subjecting the prepreg to laminate molding by heat. A process for the production of a metal foil-clad laminated sheet is also disclosed, which comprises impregnating a base paper for laminated sheet using a wood pulp having an .alpha.-cellulose content of 87.0% or more with a synthetic resin to prepare a prepreg, piling up the prepreg, placing a metal foil one either one or both sides of the prepregs, and subjecting the resulting prepregs with metal foil to laminate molding by heat. The laminated sheet or metal foil-clad laminated sheet of this invention has not only excellent punchability but also excellent electric characteristics and heat resistance and hence, it is quite useful as a laminated sheet for high density printed wiring system.

Abstract: A diaphragm or membrane for use in electrolysis cells resistant to chemical action thereof is disclosed. In the preferred and illustrated embodiment, a fluoropolymer binder cooperative with a random mix of carbon fibers up to about 13 mm long and up to about 0.01 mm in diameter forms such diaphragm or membrane. The carbon fibers are preferably pliable, nonbrittle, resilient, electrically nonconductive, impervious to chemical attack, and are annealed up to a specified temperature.

Abstract: A process for producing an electroconductive film having a volume resistivity of fiber oriented direction of not more than 1.times.10.sup.8 ohm cm comprising mixing from 94.5% to 40% volume of a thermoplastic synthetic pulp with from 5% to 30% by volume of thermoplastic composite fibers comprising of a first component having a lower melting point than that of said thermoplastic synthetic pulp and a second component having a higher melting point than that of said thermoplastic synthetic pulp, and from 0.5% to 30% by volume of electroconductive fibers to prepare a paper stock; forming a wet web from the paper stock; heating and drying said wet web at a specific first temperature to melt the first component of the composite fibers, thereby forming a base paper; and thereafter heating said base paper under pressure at a specific second temperature to melt the thermoplastic synthetic pulp, thereby forming a film having dispersed said second component and said electroconductive fibers therein.

Abstract: A novel, improved battery separator material particularly adaptable for use in maintenance free batteries. The battery separator material includes a diatomaceous earth filler, an acrylate copolymer binder and a combination of fibers comprising polyolefin, polyester and glass fibers.

Abstract: A multi-ply, fibrous material-based, conductive structure, and a method of making such a structure, which comprises as an integral structural member thereof at least one ply having an integral, continuous, uninterrupted, electroconductive barrier capable of intercepting and dissipating any electrostatic charges or discharges coming into contact with the structure. The ply provided with the electroconductive barrier can, during manufacture, be preselectively positioned with relation to the other, non-conductive plies comprising the structure to meet the specific performance demands of a user of the structure.

Abstract: An aqueous slurry comprising fibrous particles of a heat-resistant aromatic polymer and short fibers made of said polymer or insulating inorganic short fibers, or a mixture thereof, is made into a wet web and, after adjusting the water content to 50 to 95 weight %, said wet web is laid up in a desired number of layers, and then the laminate is dewatered and dried for integration under pressure at a temperature not exceeding the softening point of said aromatic polymer, thereby obtaining an oil-impregnatable insulating board with high strength and capable of uniform impregnation of oil therein.

Abstract: A fibrous sheet material suitable for use in a high-pressure laminate of improved electrical conductivity, which fibrous sheet material comprises a dried paper sheet material saturated with a heat-curable thermoset resin, and an electrically conductive amount of a quaternary ammonium compound.

Abstract: Essentially isotropic metallizable polymeric substrates having very low coefficients of thermal expansion are well adopted for printed circuits, are facilely prepared by papermaking technique and hot pressing, and are comprised of a fibrous polymer matrix, advantageously an aramide non-woven batt, bonded together with a cured imido prepolymer, and include particulate filler material, advantageously electrically insulating metal oxide particles, distributed therethrough.

Abstract: A heat resistant thin paper excellent in electrical insulating property can be obtained by subjecting pulp-like particles of aromatic polyamide or aromatic polyamide-imide, which have a low freeness and a low ion content to wet paper-making process, drying and then making the resulting web dense under a pressure.

Abstract: A static-dissipating, synthetic surface-covering sheet laminate material which comprises a plurality of cured, resin-saturated paper sheet materials laminated together under heat and pressure, and which includes a resin-saturated and cured top sheet material having an electrically conductive amount of a polyalkylene glycol, to provide a surface resistivity of the sheet laminate material of about 100 ohms per square inch or less, when tested in accordance with ASTM-0257.

Abstract: Electrically conductive paper is coated with an insulating coating comprising an organic solvent-soluble solution copolymer of monoethylenically unsaturated monomers comprising from about 1% to about 8% of copolymerized acrylamide or a monoethylenic derivative thereof in combination with from 4% to 10% of copolymerized monoethylenically unsaturated carboxylic acid including from 1/4th to 3/4ths of methacrylic acid based on total carboxylic acid monomer.

Abstract: An insulating system is described that incorporates a cellulosic material which is impregnated with a nitrogen content no less than 0.2% by weight and a overall density not greater than 0.9 gm/cm.sup.3. This cellulosic material when impregnated by a dielectric liquid such as transformer oil, exhibits a more uniform electrical stress distribution than papers having a density greater than 0.9 gm/cm.sup.3. The insulating system thereformed is particularly useful for application in low stress areas such as the layer insulation in a distribution class transformer.

Abstract: A process for making an electrographic recording material which comprises applying to a conductive support an electrically insulating layer comprising an intimate blend of a vinyl ester interpolymer latex and up to 500 parts of an inert finely divided pigment per 100 parts by weight of latex interpolymer. The vinyl ester interpolymer comprises about 3 to about 7 weight percent of carboxylic acid groups supplied by an interpolymerized C.sub.4 -C.sub.10 vinylene monobasic carboxylic acid monomer.

Abstract: Security paper with authenticity characteristics embodied therein or printed thereon which are both ferrimagnetic and also only slightly absorbed in the infrared spectral region.The presence of both properties at the same position on the security paper is tested, wherein both tests can preferably be carried out simultaneously. Materials which show this rare combination of properties are some ferrites, ferrimagnetic garnet compounds and the so-called green ferromagnetic compounds.

Abstract: A discharge recording material produced by successively forming a colored layer comprising mainly carbonblack and a binder, a deposited metal layer and optionally a protective layer on a support is provided. In particular, the discharge recording material wherein said carbonblack being carbonblack aggregates obtained by pretreating carbonblack particles with a plasticizer is provided.

Abstract: An electrostatic recording member comprising a recording layer, an electrically conductive layer and a support, wherein the electrically conductive layer is composed of from 2 to 40 parts by weight of electrically conductive micro-fine powder dispersed in from 60 to 98 parts by weight of an organic polymer binder, and has a surface resistivity of 10.sup.6 to 10.sup.8 Ohms.

Abstract: The invention relates to a method for improving the thermal stability and dielectric integrity of a cellulosic web product. The cellulosic web is impregnated with a nitrogen donor compound such that the web contains not less than 0.2% by weight of the compound and thereafter impregnated with an aqueous vegetable protein solution at a pH of not less than about 8.5.

Abstract: A method of manufacturing controlled .Iadd.surface .Iaddend.electrical resistivity carbon fiber sheet products employing a carbonizable starting material, heating and drawing the starting material (if required), .Iadd.stabilizing and .Iaddend.oxidizing the starting material .Iadd.if required .Iaddend.at an elevated temperature of the order of 220 degrees Centigrade to effect molecular aromatic rearrangement of the starting material, .Iadd.partially .Iaddend.carbonizing the oxidized starting material at .[.an.]. elevated temperature .Iadd.values .Iaddend.in an oxygen free atmosphere within a furnace having an elevated temperature extending over a temperature range .Iadd.from about 370 degrees Centigrade .Iaddend. to about 1400 degrees Centigrade .[.by soaking the.]..Iadd.. The .Iaddend.starting material .Iadd.is soaked .Iaddend.at an elevated temperature for a predetermined period of time to provide a .Iadd.known .Iaddend.preselected .Iadd.surface .Iaddend.electrical resistivity to the .Iadd.partially .