Patent application number | Description | Published |
20140325767 | METHOD FOR REMOVING SULFUR FROM FIBER USING HALIDE ACID ION EXCHANGE - The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: a) contacting never-dried sulfate anion-containing polymeric-fiber with an halide-containing acid to displace at least a portion of the sulfate ions with halide anions; and b) rinsing the fiber to remove the displaced sulfate ions. | 11-06-2014 |
20140331415 | PROCESS FOR PREPARING ARAMID COPOLYMER YARN USING A HALIDE ACID WASH - The present invention concerns methods for removing sulfur from yarn comprising the steps of: a) contacting never-dried polymeric yarn with an aqueous base, the polymer comprising imidazole groups and said polymer comprising sulfur atoms characterized as being in the form of sulfate anions; b) contacting the yarn with an aqueous acid comprising a halide; and c) rinsing the yarn. | 11-13-2014 |
20140336351 | METHOD FOR REMOVING SULFUR FROM FIBER USING A WEAK BASE - The present invention concerns methods for removing sulfur from a fiber comprising the steps of: a) contacting never-dried sulfur-containing fiber in a yarn with an aqueous base having a pKa less than or equal to 11 to release at least a portion of said sulfur, said sulfur comprising, at least in part, sulfate anions and said yarn comprising fiber derived from polymer comprising imidazole groups; and b) rinsing said yarn to remove at least a portion of released sulfur. | 11-13-2014 |
20140353858 | PROCESS FOR PREPARING ARAMID COPOLYMER YARN HAVING LOW RESIDUAL SULFUR - The present invention concerns methods for producing a yarn comprising the steps of: (a) producing a plurality of dope filaments by spinning a polymer solution in sulfuric acid through a multi-hole spinneret, the polymer comprising imidazole groups; (b) coagulating the plurality of dope filaments into an as-spun yarn; (c) contacting the yarn with an aqueous base having a pKa less than or equal to 11; and (d) rinsing the yarn. | 12-04-2014 |
20140356610 | SULFUR-CONTAINING IMIDAZOLE FIBER HAVING IONICALLY BONDED HALIDES - The present invention concerns fiber made from a polymer comprising imidazole groups, fiber further having: i) a halide anion, the halide anion being present in an amount of 0.05 to 20.1 weight percent, based on weight of fiber; and ii) sulfur, wherein the sulfur is present in the fiber in an amount of 0.05 to 3 weight percent. | 12-04-2014 |
20140356611 | SULFUR AND ALKALI METAL CONTAINING IMIDAZOLE FIBER HAVING IONICALLY BOUND HALIDES - The present invention concerns fiber made from a polymer comprising imidazole groups, the polymer further having: i) halide anions being present in an amount in the range of 0.05 to 20.1 weight percent, based on weight of fiber; ii) sulfur, wherein the sulfur is present in the fiber in an amount in the range of 0.05 to 3 weight percent, based on weight of fiber; and iii) alkali metal ion, wherein the alkali metal ion is present in the fiber in an amount in the range of 0.05 to 2 weight percent, based on weight of fiber. | 12-04-2014 |
20150007859 | PROCESS FOR PREPARING ARAMID COPOLYMER YARN USING AN ACID WASH - The present invention concerns methods for removing sulfur from yarn comprising the steps of: a) contacting never-dried polymeric yarn with an aqueous base, the polymer comprising imidazole groups and said polymer comprising sulfur atoms characterized as being in the form of sulfate anions; b) contacting the yarn with an aqueous acid solution of pH 5 or lower; and c) rinsing the yarn. | 01-08-2015 |
20150021812 | PROCESS FOR PREPARING YARN DERIVED FROM ARAMID COPOLYMER FIBER HAVING LOW RESIDUAL SULFUR - The present invention concerns processes for producing a yarn comprising polymer comprising imidazole groups, the process having the following steps: (a) spinning a solution of polymer in sulfuric acid to give rise to a plurality of dope filaments; (b) coagulating the plurality of dope filaments into a multi-filament as-spun yarn; and (c) washing the as-spun multi-filament yarn with an aqueous acid comprising a halide or an aqueous salt comprising a halide or combination thereof. | 01-22-2015 |
20150047130 | METHOD FOR REMOVING SULFUR FROM FIBER USING AN AQUEOUS ACID - The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: contacting never-dried sulfate anion-containing polymeric-fiber with an aqueous acid having a pKa of less than 5 to displace at least a portion of the sulfate anions; and b) rinsing the fiber to remove the displaced sulfate ions. | 02-19-2015 |
Patent application number | Description | Published |
20120327297 | DISPLAY SYSTEM AND METHOD FOR PROJECTION ONTO NON-PLANAR SURFACES - A system for projecting changeable electronic content, such as video or digital still images, onto a curved surface. The system includes a housing, a reflector within the housing, and a projector. The housing has an exterior surface and an interior space. At least a portion of the exterior surface is a curved display surface capable of displaying electronic content projected upon it, and at least one portion of the exterior surface has an aperture through the exterior surface to the interior space. The projector is located proximate the aperture for projecting content through the aperture to the reflector. When the projector receives converted content and projects the converted content through the aperture to the reflector, the curved display surface displays the converted content undistorted to a viewer. The system can also provide for display of branded content on a product container having a shape corresponding with the brand. | 12-27-2012 |
20130033650 | DISPLAY SYSTEM AND METHOD FOR PROJECTION ONTO MULTIPLE SURFACES - A system for projecting changeable electronic content, such as video or digital still images, onto multiple surfaces. The system includes a projector, one or more reflectors, and at least two display surfaces. The projector via a reflector projects content onto one of the display surfaces and either directly or via another reflector projects content onto the other display surface. The display surfaces can be multiple curved surfaces, multiple planar surfaces in different viewing planes, or a curved surface and a planar surface. For the curved surfaces, the projector receives converted content and projects the converted content such that the curved surface displays the converted content undistorted to a viewer. The system can also provide for display of branded content on a product container having a shape corresponding with the brand. | 02-07-2013 |
20140218695 | ORTHOGONALLY DISPOSED PROJECTION SURFACES - A system for projecting changeable electronic content across multiple display surfaces. The system includes display surfaces arranged at a non-zero angle with respect to one another, such as three orthogonal display surfaces in the corner of a rectangular shaped product container. Changeable electronic content, including video and digital still images, is converted such that, when the projector receives and projects the content to the multiple display surfaces, the content is displayed undistorted to a viewer. | 08-07-2014 |