| Patent application number | Description | Published |
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| 20090048359 | Compositions for compounding, extrusion and melt processing of foamable and cellular fluoropolymers - The disclosure provides a composition or set of compositions and methods for producing cellular foamable, foamed, or blown perfluoropolymers or fluoropolymers and other thermoplastics to create products including a lower cost communications cable, conductor separator, conductor support-separator, jacketing, tape, wire insulation and in some cases a conduit tube as individual components or combined configurations that exhibit improved electrical, flammability and optical properties. The composition of the invention can be is chemically foamable yielding homogeneous foamed insulating structures which excel simultaneously in providing excellent insulating properties on metal wires or optical fibers, outstanding processing parameters for high speed cable manufacture and high performance ratings on flammability, smoke generation and fuel load. Specifically, the foamable perfluoropolymer cellular insulation composition comprises blending or individually utilizing; a selected perfluoropolymer in combination with magnesium carbonate, calcium carbonate and Aclyn® wax; a second composition comprising the first composition and an additional selected one or more perfluoropolymers; a third composition comprising; talc and the selected one or more perfluoropolymers; a fourth composition comprising; the second composition, the third composition and the selected one or more perfluoropolymers. A single compounded pellet or product resulting in cellular foams obtained from melt processing the pellets has also been realized by providing the melt combination of only talc and a perfluoropolymer. The present invention includes a foamable perfluoropolymer composition comprising at least one melt-processible per(halo)fluoropolymer; and a blowing agent comprising an effective amount of magnesium carbonate; and
| 02-19-2009 |
| 20100072644 | Compositions, additives, and compounds for melt processable, foamable, and cellular fluoroploymers - The disclosure provides a composition or set of compositions and method for producing cellular, foamed, or blown fluoropolymers such as perfluoropolymers and other thermoplastics to create a lower cost communications cable, conductor separator, conductor support-separator, jacketing, tape, wire insulation and in some cases a conduit tube as individual components or combined configurations that exhibit improved electrical, flammability and optical properties. Specifically, the foamable or blown perfluoropolymer cellular insulation composition comprises; talc and the selected fluoropolymers such as perfluoropolymers. Compounded pellets including inorganic and organic fillers resulting in products in cellular or foamable form with and without solid skin surfaces has also been realized by providing melt combinations within the pellets primarily comprising talc and a perfluoropolymer, and additives as needed to provide desired property differentiation. | 03-25-2010 |
| 20100151243 | COMPOSITIONS FOR COMPOUNDING FOAMABLE, FLUROPOLYMER PELLETS FOR USE IN MELT PROCESSING CELLULAR OR FOAMED FLUOROPOLYMER APPLICATIONS - The disclosure provides a composition as well as a set of compositions and method for producing cellular or foamed or blown fluoropolymers such as perfluoropolymers and other thermoplastics articles allowing for the creation of a lower cost communications cable, conductor separator, conductor support-separator, jacketing, tape, wire insulation and in some cases a conduit tube as individual components or combined configurations that exhibit improved electrical, flammability and optical properties. Specifically, the foamable or blown fluoropolymer such as a perfluoropolymer cellular insulation composition comprises; talc and the selected fluoropolymer such as perfluoropolymers. Compounded pellets or products resulting in cellular or foamable products using these pellets has also been realized by providing the melt combination in the pellets of only talc and a perfluoropolymer. | 06-17-2010 |
| 20100206609 | HIGH PERFORMANCE SUPPORT-SEPARATORS FOR COMMUNICATIONS CABLES PROVIDING SHIELDING FOR MINIMIZING ALIEN CROSSTALK - The present invention includes a high performance communications cable that provides for wireless fidelity applications and includes core support-separators having profiles which define a clearance to maintain spacing and/or channel between the transmission media and power conductors. The core may be formed of a conductive or insulative material that have, principally, polymer blends that include olefin and/or fluoropolymer and/or chlorofluoropolymer based resins. The polymer blends can also be utilized for fabricating shielding materials. The core support-separators have both a central region as well as a plurality of shaped sections that extend outward from the central region that are either solid or partially solid, foamed or foamed with a solid skin surface. | 08-19-2010 |
| 20100243291 | HIGH PERFORMANCE COMMUNICATIONS CABLES SUPPORTING LOW VOLTAGE AND WIRELESS FIDELITY APPLICATIONS PROVIDING REDUCED SMOKE AND FLAME SPREAD - The present invention provides conductive and/or insulative compositions comprising polymer blends that include olefin and/or fluoropolymer and/or chlorofluoropolymer based resins with and without inorganic additives. These compositions reduce flammability and smoke generation and are used primarily for insulation materials and for high performance communications cables. In addition, support-separators using these same compositions, to be used within the communications cables, and normally within the cable core, are described. These unique compositions include polymer blends that offer both flame and smoke suppression while maintaining the characteristics necessary to improve electrical performance and allow for severe cost reduction over conventional separators. These polymers blends can also be utilized for fabricating shielding materials. The specially shaped core support-separators can be either interior to the cable jacket or be employed singularly without the benefit of a jacket and extend along the longitudinal length of the communications cable. Alternatively, if no jacket is used for cable completion, a portion of the separator with a thin layer of material surrounding the separator core can act as a type of skin for mechanical protection. Specially shaped core support-separators have both a central region as well as a plurality of shaped sections that extend outward from the central region for which the materials of construction are either solid or partially solid, foamed or foamed with a solid skin surface. | 09-30-2010 |
| 20110224318 | Compositions for Compounding, Extrusion and Melt Processing of Foamable and Cellular Fluoropolymers - The present invention relates generally to the use of talc as a chemical foaming agent in perfluoropolymers to form foamable and foamed compositions. For example, in one aspect, a foamable composition is disclosed, which comprises (i) one or more base perfluoropolymers comprising at least 50 percent by weight of the composition, and (ii) talc blended with the one or more base perfluoropolymers, where the talc comprises 3 percent to about 15 percent by weight of the composition. Each of the perfluoropolymers is selected from the group consisting of tetrafluoroethylene/perfluoromethylvinyl ether copolymer (MFA), hexafluoropropylene/tetrafluoroethylene copolymer (FEP) and perfluoroalkoxy (PFA) and any blend thereof, where hydrogen-containing fluoropolymers are absent from the composition. The one or more base perfluoropolymers are melt-processable at one or more elevated processing temperatures of at least about 600° F. at which the talc functions as a chemical foaming agent for extrusion or mold processing of the composition into a foamed article having uniform cell structures. | 09-15-2011 |
| 20110266052 | HIGH PERFORMANCE SUPPORT-SEPARATORS FOR COMMUNICATIONS CABLES PROVIDING SHIELDING FOR MINIMIZING ALIEN CROSSTALK - The present invention includes a high performance communications cable that provides for wireless fidelity applications and includes core support-separators having profiles which define a clearance to maintain spacing and/or channel between the transmission media and power conductors. The core may be formed of a conductive or insulative material that have, principally, polymer blends that include olefin and/or fluoropolymer and/or chlorofluoropolymer based resins. The polymer blends can also be utilized for fabricating shielding materials. The core support-separators have both a central region as well as a plurality of shaped sections that extend outward from the central region that are either solid or partially solid, foamed or foamed with a solid skin surface. | 11-03-2011 |
| 20110284287 | Flame Retardant and Smoke Suppressant Composite High Performance Support-Separators and Conduit Tubes - The present invention includes a high performance communications cable exhibiting reduced cross-talk between transmission media with one or more core support-separators having various shaped profiles defining a clearance that maintains spacing between transmission media. The core is formed of a conductive or insulative material to further reduce cross-talk and improve other electrical properties in addition to reducing flame and smoke spread. The cable and separators are comprised of polymer blends that include olefin and/or fluoropolymer and/or chlorofluoropolymer based resins with and without inorganic additives including nano-clay composites. The core support-separators have both a central region and a plurality of shaped sections that extend outward from the central region and are solid, or partially solid, foamed, or foamed with a solid skin surface. In addition, the invention includes the incorporation of hollow ducts used to provide a pathway for conductor media before, during, or after installation of the cable. | 11-24-2011 |
