Polyethylene Patents (Class 174/110PM)
  • Patent number: 6159617
    Abstract: Ethylene polymers having a) a Polydispersity Index of about 2 to about 4; b) a melt index, MI, and Relaxation Spectrum Index, RSI, such that (RSI)(MI.sup.0.6) is about 2.5 to about 6.5; c) a Crystallizable Chain Length Distribution Index, L.sub.w /L.sub.n, of about 1.0 to about 9; and d) a density, .rho., and a percent haze when fabricated into films such that the percent haze is less than 370.rho.-330, are provided. These ethylene polymers advantageously combine superior clarity and toughness with low extractables and enhanced processing ease.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: December 12, 2000
    Assignee: Univation Technologies, LLC
    Inventors: George Norris Foster, Tong Chen, Robert Harold Vogel, Scott Hanley Wasserman, Day-Chyuan Lee, Walter Thomas Reichle, Frederick John Karol, Gregory Todd Whiteker
  • Patent number: 6147309
    Abstract: A communications cable having superior electrical characteristics and meeting the burn requirements for plenum applications has a core formed of one or more twisted wire pairs having primary insulation formed of a suitable material, such as high density polyethylene. The core is surrounded by a single outer jacket formed from a material having excellent heat/flame resistance characteristics and acceptable electrical characteristics that are substantially stable at relatively high temperatures, such as a foamed thermoplastic halogenated polymer, for example polyvinylidene fluoride material. The electrical conductors utilized by the cable are oversized (relative to conventional 24 gauge conductors) to enhance the electrical performance of the cable. An air gap formed between the conductor core and the outer jacket further enhances the electrical performance of the cable.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: November 14, 2000
    Inventors: John J. Mottine, Kenneth S. Koehler, Sayed J. Mirkazemi, William B. Dawson
  • Patent number: 6130385
    Abstract: The invention relates to a coaxial high-frequency cable including an inner conductor, a dielectric material formed about the inner conductor, and an outer conductor formed about the dielectric material. According to the invention, the dielectric material is made from an expanded polymer blend compounded from two a-olefin polymers of different densities, whereby the polymer of the higher density forms the matrix of the polymer blend.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: October 10, 2000
    Assignee: NK Cables Oy
    Inventors: Vesa Tuunanen, Hans-Bertil Martinsson
  • Patent number: 6103374
    Abstract: A composition comprising:(a) polyolefin;(b) as a scorch inhibitor, 4,4'-thiobis(2-methyl-6-t-butyl phenol); 2,2'-thiobis(6-t-butyl-4-methylphenol); or mixtures thereof;(c) hydroquinone; a substituted hydroquinone; or mixtures thereof in an amount sufficient to control color formation; and(d) an organic peroxide.
    Type: Grant
    Filed: June 16, 1998
    Date of Patent: August 15, 2000
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventor: Michael John Keogh
  • Patent number: 6063496
    Abstract: Polyamide coating compositions that demonstrate strength and toughness, flame and corrosion resistance and resistance to hydrolysis and thermal degradation at coating thicknesses of less than or equal to 0.25 mm or 0.15 mm are provided. Such coating compositions are extremely useful for coating wires or cables that are housed in automotive electrical harnesses.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: May 16, 2000
    Assignee: Judd Wire, Inc.
    Inventors: Mark A. Jozokos, Young Joon Kim, Wei Zhu
  • Patent number: 6060162
    Abstract: A pulsed voltage surge resistant magnet wire comprising a conductor, a continuous and concentric and flexible uniform coat of base insulation material superimposed on the conductor. An essentially continuous and concentric and uniform pulsed voltage surge shield overlaying the coat of base insulation material. The shield has therein an effective amount of a particulate material. The shield is superimposed on the coat of base insulation material, and has a continuous and concentric and flexible and uniform top coat of insulation material superimposed thereon.
    Type: Grant
    Filed: June 8, 1995
    Date of Patent: May 9, 2000
    Assignee: Phelps Dodge Industries, Inc.
    Inventors: Weijun Yin, Donald J. Barta
  • Patent number: 6037546
    Abstract: A communications cable having superior electrical characteristics and meeting the burn requirements for plenum applications has a core formed of one or more twisted wire pairs having primary insulation formed of a suitable material, such as high density polyethylene. The core is surrounded by a single outer jacket formed from a material having excellent heat/flame resistance characteristics and acceptable electrical characteristics that are substantially stable at relatively high temperatures, such as a foamed thermoplastic halogenated polymer, for example polyvinylidene fluoride material. The electrical conductors utilized by the cable are oversized (relative to conventional 24 gauge conductors) to enhance the electrical performance of the cable. An air gap formed between the conductor core and the outer jacket further enhances the electrical performance of the cable.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: March 14, 2000
    Assignee: Belden Communications Company
    Inventors: John J. Mottine, Kenneth S. Koehler, Sayed J. Mirkazemi, William B. Dawson
  • Patent number: 6010788
    Abstract: A high speed data transmission cable comprises a pair of primary cables positioned adjacent to each other along their lengths with each primary cable including a pair of generally parallel conductors coupled together and surrounded by insulation. A shield layer surrounds each primary cable along its length to isolate the primary cables from each other. The primary cables and corresponding shield layers are twisted together around a center axis and form a double helical structure, thereby providing improved transmission characteristics in the high speed data transmission cable.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: January 4, 2000
    Assignee: Tensolite Company
    Inventors: Matthew T. Kebabjian, Jerry J. Kulaga
  • Patent number: 6005192
    Abstract: An improved jacket material for insulated electric cable wherein the jacket contains one or more additives of an ion exchange resin and/or an ionic scavenging compound for neutralizing or capturing ionic impurities.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: December 21, 1999
    Assignee: University of Connecticut
    Inventors: Matthew S. Mashikian, Joseph H. Groeger, John A. Tanaka, Bruce S. Bernstein
  • Patent number: 5981065
    Abstract: An article of manufacture comprising (i) a plurality of electrical conductors, each surrounded by one or more layers of a mixture comprising one or more polyolefins and the reaction product of (a) a functionalized hindered amine amic acid hydrazide and (b) a functionalized hindered phenol or a functionalized hindered amine hydrazide and (ii) hydrocarbon cable filler grease within the interstices between said surrounded conductors.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: November 9, 1999
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Michael John Keogh, Geoffrey David Brown
  • Patent number: 5965263
    Abstract: There is disclosed an insulated wire, having, on a conductor, an insulating coating including at least three layers, made up of an underlayer formed by applying and baking a polyamine-imide-series resin coating material, containing 0.05 to 1.0 parts by weight of a trialkylamine, and/or 5 to 20 parts by weight of an alkoxylated melamine resin, per 100 parts by weight of a polyamide-imide-series resin, an intermediate layer formed by applying and baking a polyimide-series resin coating material, and an overlayer formed by applying and baking a self-lubricating-type polyamide-imide-series resin coating material. According to the insulated wire, an insulating coating can be prevented from being damaged at the time of the working of a coil under severe conditions, even when the insulating coating is thin.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: October 12, 1999
    Assignees: The Furukawa Electric Co., Ltd., Denso Corporation
    Inventors: Yoshinori Tatematsu, Atsushi Higashiura, Naruhiko Inayoshi, Hiromitsu Asai
  • Patent number: 5919565
    Abstract: A cable comprising one or more electrical conductors or a core of one or more electrical conductors, each conductor or core being surrounded by an insulating composition comprising a mixture of(i) about 20 to about 50 percent by weight of a homogeneous polyethylene having a polydispersity in the range of about 1.5 to about 3.5 and an essentially uniform comonomer distribution; and(ii) about 50 to about 80 percent by weight of a homopolymer of ethylene made by a high pressure process.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: July 6, 1999
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventor: Laurence Herbert Gross
  • Patent number: 5902681
    Abstract: An insulated wire having as components a conductor, a first insulating layer on the conductor, and a second insulating layer which comprises a coating resin having a glass transition temperature of between 100 and 250.degree. C. after baking and a lubricant and has a thickness of 0.005 mm or less, which has good lubricity and resistance to processing.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: May 11, 1999
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Isao Ueoka, Akira Mizoguchi, Kazuhiro Matumura, Yuki Taguchi, Toshiaki Shishino
  • Patent number: 5837939
    Abstract: A cable having one or more electrical conductors or a core of electrical conductors, each electrical conductor or core being surrounded by an insulating composition, essentially free from water tree growth inhibitors, having(i) a polyethylene having a density in the range of 0.860 to 0.940 gram per cubic centimeter; and, based on 100 parts by weight of component (i),(ii) about 0.2 to about 1 part by weight of a homopolymer of propylenewith the proviso that the insulating composition is extruded at a temperature below the melting point of the homopolymer of propylene.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: November 17, 1998
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Gary S. Cieloszyk, Jinder Jow
  • Patent number: 5807635
    Abstract: A cable construction comprises the following components: (i) a plurality of insulated electrical conductors having interstices therebetween, said insulation comprising (a) one or more polyolefins selected from the group consisting of polyethylene, polypropylene, and mixtures thereof, and, blended therewith, (b) a mixture containing one or more alkylhydroxy-phenylalkanoyl hydrazines and one or two functionalized hindered amines; (ii) hydrocarbon cable filler grease within the interstices; and (iii) a sheath surrounding components (i) and (ii) wherein said hindered amines have the following structural formulae: ##STR1## wherein n is about 2 to about 12; R is CxHyOz wherein x is about 2 to about 6, y is about 4 to about 16, and z is zero to about 3; ##STR2## wherein m is about 2 to about 30; n is about 2 to about 30; and x is about 1 to about 30; or ##STR3## wherein n is about 2 to about 20.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: September 15, 1998
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Jeffrey Morris Cogen, Michael John Keogh, Geoffrey David Brown
  • Patent number: 5770819
    Abstract: Insulated wires and cables, especially local area network (LAN) cables, in which the conductors are covered by foamed insulation made from a composition containing an ECTFE polymer having a crystallinity of at least 50% by weight, and, dispersed in the ECTFE polymer, particles of a PTFE polymer having a crystallinity of at least 50%, the ratio by weight of the ECTFE polymer to the PTFE polymer being 1:1 to 9:1.
    Type: Grant
    Filed: October 23, 1995
    Date of Patent: June 23, 1998
    Assignee: Raychem Corporation
    Inventor: Ashok Mehan
  • Patent number: 5766761
    Abstract: A cable construction comprising the following components: (i) a plurality of insulated electrical conductors having interstices therebetween, said insulation comprising (a) one or more polyolefins selected from the group consisting of polyethylene, polypropylene, and mixtures thereof, and, blended therewith, (b) a mixture containing one or more alkylhydroxy-phenylalkanoyl hydrazines and one or two functionalized hindered amines; (ii) hydrocarbon cable filler grease within the interstices; and (iii) a sheath surrounding components (i) and (ii) wherein said hindered amines have the following structural formulae in which n is about 2 to about 10: ##STR1##
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: June 16, 1998
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Jeffrey Morris Cogen, Michael John Keogh, Geoffrey David Brown
  • Patent number: 5750931
    Abstract: Improved insulative cable assemblies and methods for producing them are disclosed. The insulative cable assemblies have a conductor housed within a polymeric insulation layer expanded with expandable thermoplastic microspheres. The use of a relatively inelastic outside sheath controls the expansion of the insulative layer and assures a snug fit between the insulation and the conductor. The insulation layer is highly resilient and resistant to dielectric changes due to compression or damage from mechanical manipulation of the cable. Additionally, the ability to expand the insulative layer after cable assembly is completed provides far greater freedom in cable processing without compromising low dielectric constant.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: May 12, 1998
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Gordon L. McGregor, Raymond B. Minor, William Hardie, Michael Kennedy
  • Patent number: 5747574
    Abstract: A flame-retarded resin composition contains three types of components: (A) a multiple copolymer of alkylacrylate or alkyl methacrylate, ethylene, and maleic anhydride; (B) thermoplastic styrene elastomer having a tensile strength of 250 kgf/cm.sup.2 or greater; and (C) polyolefin resin except the component (A). The three components have a specific blending ratio, and are added and mixed with a metal hydroxide in a specific quantity to form the composition having a hardness of durometer D not less than 48 nor more than 58.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: May 5, 1998
    Assignee: Yazaki Corporation
    Inventor: Yasuo Kanamori
  • Patent number: 5744756
    Abstract: A high speed signal transmission cable including spaced, parallel conductors and an insulation layer comprising blown micro fiber web surrounding the conductors, preferably further including a layer of another dielectric material surrounding the microfiber material.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: April 28, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Denis Dean Springer, Harry Alan Loder, Robert Sam Dodsworth
  • Patent number: 5744757
    Abstract: A plenum cable having a plurality of twisted pair conductors enclosed by a jacket. A plurality of the twisted pair conductors has one insulating material thereon and at least one twisted pair conductor has a different insulation material thereon. In the preferred structure at least one twisted-pair conductor has flame retardant polyethylene or flame retardant polypropylene insulation and at least one other twisted pair conductor being insulated with fluorinated ethylene propylene, tetrafluoroethylene, or ethylenechloro-trifluoroethylene. The preferred twisted pair conductors have a center-to-center distance along any point of a 1000 ft. twisted pair conductor that is .+-.0.3 of an average center-to-center distance and/or have an impedance of 90 to 110 ohms and a variation of .+-.0.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: April 28, 1998
    Assignee: Belden Wire & Cable Company
    Inventors: Robert D. Kenny, Douglas O'Brien
  • Patent number: 5739473
    Abstract: The preferred embodiment of the cable disclosed includes seven groups of twisted-pairs, outlined in dashed lines in FIG. 1. Groups 12, 14, 17 and 19 have four pairs each, and groups 13, 16 and 18 have three pairs each. Six of the groups, namely 12, 13, 14, 16, 17 and 18 are referred to herein as the outer groups since they are collectively twisted and wound helically about the seventh group 19 which is centrally located throughout the length of the cable. Each of the groups of twisted pairs may be held together by a cable binder such as nylon yarn 22. The core thus formed is enclosed within a jacket 23, and the entire assembly is referred to in the art as a "honeycomb" structure. In accordance with the present invention, the twisted pairs of each of the six outer groups are insulated with a fluorinated ethylene-propylene copolymer (FEP) material such as, for example, Teflon.RTM., while the twisted pairs of the central group are insulated with a high density polyethylene (HDPE) material.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: April 14, 1998
    Assignee: Lucent Technologies Inc.
    Inventor: Stephen Taylor Zerbs
  • Patent number: 5731082
    Abstract: A cable comprising one or more electrical conductors or a core of one or more electrical conductors, each conductor or core being surrounded by a layer of insulation comprising a multimodal copolymer of ethylene and one or more alpha-olefins, each alpha-olefin having 3 to 8 carbon atoms, the copolymer having a broad comonomer distribution as measured by TREF with a value for the percent of copolymer, which elutes out at a temperature of greater than 90 degrees C., of greater than about 5 percent; a WTGR value of less than about 20 percent; a melt index in the range of about 0.1 to about 30 grams per 10 minutes; and a density in the range of 0.880 to 0.950 gram per cubic centimeter, and being prepared by a low pressure process.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: March 24, 1998
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Laurence Herbert Gross, Alfred Mendelsohn
  • Patent number: 5721397
    Abstract: A flexible, tough electrical insulation is described for use in electric motors, generators, hermetic motors, transformers, and other electrical devices. The insulation described herein includes a layer of a cyclohexylene dimethylene terephthalate polymer (PCT), or one or more copolymers thereof. The PCT layer can be used in a film or in a nonwoven mat form, by itself, or alternatively, as a component of a laminate. The insulation can take the form of an insulating tape, an insulating sheet, an electric motor slot liner, motor wedges, or as some other die-cut insulating component. The insulation and products protected by the insulation can be used in a broad range of service application temperatures.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 24, 1998
    Inventor: Martin J. Weinberg
  • Patent number: 5719353
    Abstract: A reinforced coaxial cable for underground service is disclosed. The cable generally includes an elongate center conductor, a surrounding dielectric material such as a foamed polymer dielectric, an outer conductor, a first jacket, an intermediate protective layer, and a second jacket. A ripcord can be positioned longitudinally between the first jacket and the intermediate protective layer to facilitate removal of both the intermediate protective layer and the second jacket. A tracer, or other visible indicia, extends longitudinally along the outer surface of the second jacket to facilitate locating the underlying ripcord. The intermediate layer and the second jacket provide increased impact resistance, cut-through resistance, and compressive strength, as well as increased resistance to abrasion and other frictionally induced damage. In addition, the intermediate layer and second jacket can be readily removed to allow increased flexibility or connectorization of the cable.
    Type: Grant
    Filed: June 13, 1995
    Date of Patent: February 17, 1998
    Assignee: Commscope, Inc.
    Inventors: Bruce J. Carlson, David H. Pixley, James L. Sorosiak
  • Patent number: 5718974
    Abstract: A cable comprising one or more communications media or electrical conductors, or a core of two or more communications media or electrical conductors, each communications medium, electrical conductor, or core being surrounded by at least two layers, an inner insulating layer and an outer jacketing layer, is disclosed. The jacketing layer comprises an in situ blend of two copolymers of ethylene and one or more alpha-olefins having 3 to 12 carbon atoms. The blend has an Mw/Mn ratio in the range of about 8 to about 22; a melt index in the range of about 0.2 to about 3.5 grams per 10 minutes; a melt flow ratio in the range of about 55 to about 135; a molecular weight in the range of about 90,000 to about 250,000; and a density of at least 0.915 gram per cubic centimeter.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: February 17, 1998
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventor: Chester J. Kmiec
  • Patent number: 5698323
    Abstract: A cable comprising one or more electrical conductors or communications media, or a core of two or more electrical conductors or communications media, each electrical conductor, communications medium, or core being surrounded by a composition, which is essentially halogen and antimony free, comprising:(a) a copolymer of ethylene and an unsaturated ester comonomer selected from the group consisting of:(i) an alkyl acrylate;(ii) an alkyl methacrylate; and(iii) a vinyl carboxylatewherein (A) the alkyl group has 1 to 8 carbon atoms and the carboxylate group has 2 to 8 carbon atoms;(B) the copolymer is, optionally, modified with an anhydride of an unsaturated aliphatic diacid having 4 to 20 carbon atoms;(C) the copolymer has an ester content in the range of about 5 to about 50 percent based on the weight of the copolymer and a melt index in the range of about 0.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: December 16, 1997
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Michael John Keough, Sundaresan Ramachandran, Geoffrey David Brown
  • Patent number: 5650205
    Abstract: A flame-retardant resin composition comprising 100 parts by weight of a thermoplastic resin, from 10 to 80 parts by weight of a bis(halogenophenyl)terephthalamide, and from 5 to 40 parts by weight of antimony trioxide; an electric wire comprising a conductor having thereon an insulating layer comprising the resin composition; and a tube or a heat-shrinkable tube comprising the resin composition.
    Type: Grant
    Filed: April 13, 1993
    Date of Patent: July 22, 1997
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Satoshi Shukushima
  • Patent number: 5597981
    Abstract: In an unshielded twisted pair cable, a predetermined number of pairs which are twisted by a predetermined lay-length are covered by a protective sheath. Insulations for insulating conductors for the pairs and the protective sheath are wholly or partially of halogen free polymer having a low dielectric loss tangent and flame-retarding properties. The insulations have a dielectric loss tangent of less than 1.times.10.sup.-2 at 150 MHz and a 2% modulus of at least 0.3 kgf/mm.sup.2.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: January 28, 1997
    Assignee: Hitachi Cable, Ltd.
    Inventors: Shinji Hinoshita, Akinari Nakayama, Kiyoshi Watanabe, Hideki Yagyu, Shinya Ishi, Shigeru Iwata
  • Patent number: 5576515
    Abstract: A low pair count high performance, TIA/EIA 568 Category 5 plenum rated cable has a core made up of a plurality of twisted pairs of conductors, each conductor being insulated with a tetrafluoroethylene/hexafluoropropylene copolymer material, and a single twisted pair of conductors wherein each conductor is insulated with a high density polyethylene material. The core is surrounded and enclosed in a jacket of a plasticized copolymer of ethylene and clorotriflouoroethylene material.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: November 19, 1996
    Assignee: Lucent Technologies Inc.
    Inventors: Larry L. Bleich, Tommy G. Hardin, William Meyers, Warren F. Moore
  • Patent number: 5563377
    Abstract: A telecommunications cable having a cable core in which each conductor is surrounded by an individual dual layer insulation of an inner layer of flame retardant polyolefin and an outer layer of fluorinated ethylene propylene. The cable is for plenum chamber usage in which smoke is to be minimized. Although the flame retardant polyolefin is a known smoke generating substance which does not satisfy plenum test smoke requirements, its use in this structure is entirely suitable for plenum chamber use because little or no smoke is actually generated as the outer layer protects the inner layer from combustion.
    Type: Grant
    Filed: June 16, 1994
    Date of Patent: October 8, 1996
    Assignee: Northern Telecom Limited
    Inventors: Benoit Arpin, Gayriel L. Vexler
  • Patent number: 5536777
    Abstract: A polyethylene composition which is useful in insulations and joints of extra-high voltage power cables, and in which a cross-linking agent, comprising an organic peroxide subjected to purification processing, and an antioxidant, are blended, wherein the cross-linked composition has a dielectric loss tangent (tan.delta.) of less than or equal to 0.07% at a temperature of 90.degree. C. and under an electric field stress of 20 kV/mm. This polyethylene composition exhibits little dielectric loss, even at high temperatures or high electric field stresses, and is optimally employed in insulations and joints for extra-high voltage power cables of 275 kV or more.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: July 16, 1996
    Assignees: Fujikura Ltd., NOF Corporation
    Inventors: Izumi Ishikawa, Hiroyuki Miyata, Thoru Nakatsuka, Kazuhiko Goto, Kenji Matsui, Shiro Nakayama, Tohru Takahashi, Mitutaka Tanida, Toshio Niwa
  • Patent number: 5525757
    Abstract: An insulated conductor and the flame retardant insulation composition used in plenum cables. The insulation composition includes as a polyolefin blend from about 50 to 85 parts by weight of polypropylene, 10 to about 40 parts by weight of a very low density polyethylene and from about 5 to about 20 parts by weight of a high and/or low density polyethylene. To one hundred parts by weight of the polyolefin blend there is about 6 to about 20 parts by weight of a chlorinated flame retardant, from about 4 to about 12 parts by weight of a flame retardant intumescent, from about 20 to 60 parts by weight of a non-halogen flame retardant, from about 0.2 to about 1.0 parts by weight of hindered phenolic stabilizer; and from about 0.1 to about 0.4 parts by weight of additional stabilizers. One of the non-halogen flame retardants in the polyolefin composition, may be zinc borate which triggers polymer and flame retardant decomposition when the polyolefin composition is exposed to an igniting flame.
    Type: Grant
    Filed: March 15, 1995
    Date of Patent: June 11, 1996
    Assignee: Belden Wire & Cable Co.
    Inventor: Douglas D. O'Brien
  • Patent number: 5521010
    Abstract: A polyethylene for an insulation layer of a power cable, of which the dissipation factor never increases even in a high-temperature, high electric field, and a crosslinked polyethylene insulated power cable which uses this polyethylene so that the high-temperature dielectric breakdown voltage is large enough for high-capacitance transmission. This polyethylene is a low-density polyethylene which is synthesized by high-pressure radical polymerization of ethylene, and has properties including: a melt flow rate of 0.1 to 10 g/10 minutes; a density of 0.915 to 0.935 g/cm.sup.3 ; an absorbance of 0.03 to 1.0 for a ketone-type carbonyl group, having a peak in a position corresponding to a wave-number of 1,725.+-.4 cm.sup.-1 in an infrared absorption spectrum, an absorbance of 1.0 or less for an ester-type carbonyl group, having a peak in a position corresponding to a wave-number of 1,743.+-.4 cm.sup.-1 and absorbances of less than 0.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: May 28, 1996
    Assignees: The Furukawa Electric Co., Ltd., Mitsubishi Chemical Corporation
    Inventors: Toshiya Tanaka, Hitoshi Kimura, Koji Yamamoto, Mitsugu Ishioka, Setsuo Goto
  • Patent number: 5521333
    Abstract: A four-core balanced transmission cable of the present invention includes four insulated electric wires, a low dielectric center interposition member having a diameter 0.35 to 0.45 times as great as an external diameter of the insulated electric wire, a pressing winding material for compressedly winding the four insulated electric wires and the center interposition member and a covering member for covering an external circumference of the pressing winding material. Accordingly, the four-core balanced transmission cable of the present invention is thin, soft and light so as to meet the standards or requirements for a cabling system of a computer.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: May 28, 1996
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Seie Kobayashi, Tetsuo Harada, Seiji Endo
  • Patent number: 5514837
    Abstract: A plenum cable having a plurality of insulated conductors enclosed by a jacket. Each of the insulated conductors or twisted-pair conductors has a dielectric constant that varies .+-.0.25 from any other insulated conductor or twisted-pair conductor. In the preferred structure at least one twisted-pair conductor has flame retardant polyethylene or flame retardant polypropylene insulation and at least one other twisted pair conductor being insulated with fluorinated ethylene propylene, tetrafluoroethylene, or ethylenechloro-trifluoroethylene.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: May 7, 1996
    Assignee: Belden Wire & Cable Company
    Inventors: Robert D. Kenny, Douglas O'Brien
  • Patent number: 5474847
    Abstract: An article of manufacture comprising, as a first component, a plurality of electrical conductors, each surrounded by one or more layers of a mixture comprising one or more polyolefins and the reaction product of a compound containing a sterically hindered amine or phenol and a quinone compound, and, as a second component, hydrocarbon cable filler grease within the interstices between said surrounded conductors.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: December 12, 1995
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Michael J. Keogh, Jeffrey M. Cogen, Geoffrey D. Brown
  • Patent number: 5470657
    Abstract: Disclosed is a heat-resistant, high-voltage insulated lead wire for direct current, which meets the demand for higher heat resistance, and its insulating coating over the conductor is formed by a polyolefin resin composition. The polyolefin resin composition is a flame-retarded resin composition comprising of a mixture of a polyethylene whose crystalline component has melting point higher than 125.degree. C. and a copolymer of ethylene and .alpha.-olefin, which contains a multifunctionalized monomer having unsaturated carbon-carbon bond moiety in the molecule as an indispensable component. The insulating coating made of this resin composition is irradiated by an ionizing radiation to give a heat-resistant, high-voltage lead wire for direct current, which has a perpendicular flame resistance (VW-1) acceptable in the UL Standards and has a temperature rating of higher than 125.degree. C.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: November 28, 1995
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Hiroshi Hayami
  • Patent number: 5459286
    Abstract: An electric conductor (10, 20, 30) provided with an insulating layer (11, 21, 31) and a protective layer (12, 22, 32), surrounding the conductor, in the form of a polymer material containing at least :stabilized polyethylene. To said polyethylene there is added a combined antioxidant and voltage stabilizer, in the form of 5,10-dihydroindeno[1,2-b]indole or substituted florins thereof such as methyl, methoxy, dimethylamino or other donor substituents to counteract degradation as a result of electric load.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: October 17, 1995
    Assignee: Asea Brown Boveri AB
    Inventors: Jan Bergman, Lennart Johansson
  • Patent number: 5455392
    Abstract: The invention concerns an electrical winding with a conductor layer (14) which is sealed in an insulating layer (30) of polyethylene. The polyethylene has a degree of crosslinking of at least 60% and contains an anti-oxidant. The starting material used is a not yet crosslinked polyethylene to which a foaming agent is added so that, when heated to be crosslinked, during which it also melts, the polyethylene penetrates between the individual turns (20) in the conductor layer (14). The protective insulating layer (24) round the individual turns of the winding consists of a material which is stable at the crosslinking temperature.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: October 3, 1995
    Inventors: Hans Preu, Viktor Doroschenko
  • Patent number: 5453322
    Abstract: An article of manufacture comprising (i) a plurality of electrical conductors having interstices therebetween, each conductor being surrounded by one or more layers of a composition comprising (a) one or more polyolefins and, blended therewith, (b) a mixture containing one or more alkylhydroxyphenylalkanoyl hydrazines and a defined functionalized hindered amine; and (ii) hydrocarbon cable filler grease within the interstices.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: September 26, 1995
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Michael J. Keogh, Geoffrey D. Brown, Jeffrey M. Cogen
  • Patent number: 5426264
    Abstract: An electrical cable for use in submersible well pumps in oil and gas well environments is provided having an electrical conductor core which is surrounded by an insulating layer of cross-linked polyethylene. A barrier layer surrounds the cross-linked polyethylene insulating layer. The barrier layer is impermeable to oil and other liquid hydrocarbons, but is permeable to low molecular gases. The barrier layer is preferably formed from a fluoropolymer and is surrounded by a polymeric protective layer. An adhesive layer attaches the barrier layer to the insulating layer.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: June 20, 1995
    Assignee: Baker Hughes Incorporated
    Inventors: David W. Livingston, David H. Neuroth, David G. Korte
  • Patent number: 5416269
    Abstract: An insulated cable which combines good roundness and good strippability includes one or more insulated conductors, an inner lining of polymeric tape wrapped around the conductors, and an outer jacket of polymeric insulation melt extruded around the inner lining. The level of adhesion between the inner lining and the conductors is less than the level of adhesion between the inner lining and the outer jacket. The insulated cable is particularly useful in anti-lock braking systems. A process for making the cable is also disclosed.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: May 16, 1995
    Assignee: Raychem Corporation
    Inventors: John L. Kemp, Alan S. Yeung
  • Patent number: 5380591
    Abstract: An article of manufacture comprising (i) a plurality of electrical conductors, each surrounded by one or more layers of a composition comprising (a) one or more polyolefins and, blended therewith, (b) a mixture containing one or more alkylhydroxyphenylalkanoyl hydrazines and one or more functionalized hindered amines; and (ii) hydrocarbon cable filler grease within the interstices between said surrounded conductors.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: January 10, 1995
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Michael J. Keogh, Geoffrey D. Brown
  • Patent number: 5336851
    Abstract: An insulated wire has a conductor, a first insulating metal oxide layer which is formed around the conductor, and a second insulating metal oxide layer, containing ceramic particles mixed by addition and formed around the first insulating metal oxide layer. The so formed insulating metal oxide layers are produced by changing a precursor of a metal oxide into the ceramic state. This change is caused by a method such as a sol-gel method or a thermal decomposition method. The mixed ceramic particles are more preferably in the form of fine platelets. This insulated wire has an excellent flexibility, emits no gas, can maintain its insulation even at a high temperature, and has a high breakdown voltage.
    Type: Grant
    Filed: December 11, 1992
    Date of Patent: August 9, 1994
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kazuo Sawada, Shinji Inazawa, Kouichi Yamada
  • Patent number: 5304619
    Abstract: A polar group-containing ethylene polymer or copolymer having improved insulating properties, or a composition thereof is characterized in that said polar group-containing ethylene polymer or copolymer contains 20 to 8000 ppm of a polar group having a dipole moment of more than 0.8 debye. The polymer can be used in a power cable as insulation.
    Type: Grant
    Filed: June 4, 1991
    Date of Patent: April 19, 1994
    Assignee: Nippon Petrochemicals Co., Ltd.
    Inventors: Junichi Yokoyama, Hideo Kawabata, Masaaki Ikeda, Katsufumi Suga, Masayoshi Kariya
  • Patent number: 5304740
    Abstract: A fusible link wire for use in an electric circuit comprising a fusible conductor for opening the circuit in response to a given current level, an inner electrical insulation layer surrounding the fusible conductor, a braided sheath positioned over the inner electrical insulation layer for increasing the structural strength of the insulation layer and for holding the inner electrical insulation layer in place in the event of a failure, and an outer protective coating surrounding the sheath and the inner electrical insulation layer for holding the sheath in place during handling or processing of the fusible link wire and for providing protection against the environment.
    Type: Grant
    Filed: November 20, 1991
    Date of Patent: April 19, 1994
    Assignee: Essex Group, Inc.
    Inventors: David A. Bozell, Eric W. Bates
  • Patent number: 5286924
    Abstract: A ribbon cable or discrete wires, having a layer of thermally stable, crush resistant, fibril microporous heat sealable thermoplastic crystallizable polymer dielectric surrounding said conductor. The thermoplastic dielectric having a void volume in excess of 70%, a propagation velocity of the insulated conductor greater than 85% the propagation velocity in air and the crush resistance being the recovery rate of the material after being under a 500 gram weight for 10 minutes greater than 92% of the initial thickness.
    Type: Grant
    Filed: September 22, 1992
    Date of Patent: February 15, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Harry A. Loder, Denis D. Springer, John L. Roche
  • Patent number: 5283120
    Abstract: An electric cable contains a cable insulation having high resistance to the formation or growth of water trees and having high aging resistance and good processibility and consisting of an ethylene polymer and from 0.5 to 40% by weight of an ethylene copolymer ionomer which contains, in addition to predominant amounts of ethylene, a C.sub.3 -C.sub.6 -alkenecarboxylic acid or a C.sub.4 -C.sub.6 -alkenedicarboxylic acid or -dicarboxylic anhydride as copolymerized units, some of the carboxyl groups or carboxylic anhydride groups having been converted into ammonium salts of tertiary amines.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: February 1, 1994
    Inventors: Ernst Koehnlein, Heinz Vogt, Johannes Schlag, Thomas Muehlenbernd, Hans-Henning Hub
  • Patent number: 5281766
    Abstract: The present invention features a new lead wire for use with class F motors, coils and transformers. The new motor lead wire has the UL-required temperature rating of at least 150.degree. C. and a voltage rating of approximately 600 volts. The lead wire is characterized by a thinner and less costly insulative construction. The motor lead wire has a conductive core member that is overcoated with a primary insulation layer of polyolefin. The polyolefin layer is of a reduced thickness, generally below the standard 30 mils. The polyolefin insulation thickness can be reduced by half, to about 15 mils. This reduced insulation layer is then protected with a jacket of polyvinylidene fluoride or a polyvinylidene fluoride copolymer having an approximate maximum thickness of 0.005 inches. The primary insulation is cross-linked and stabilized with zinc salt of methylmercaptobenzimidazole and a hindered phenol oxidant.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: January 25, 1994
    Assignee: Champlain Cable Corporation
    Inventor: Nelson Hildreth