Patents by Inventor Per-Ola Hagstrand

Per-Ola Hagstrand has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10696762
    Abstract: The present invention relates to a crosslinked polymer composition comprising a crosslinked polyolefin, wherein the polymer composition comprises, prior to crosslinking, a polyolefin and peroxide which is in an amount of less than 35 mmol —O—O-/kg polymer composition, characterized in that the crosslinked polymer composition has been in a direct contact with a semiconductive composition for 24 h at 70° C., and that the crosslinked polymer composition thereafter has an electrical DC-conductivity of 150 fS/m or less, wherein the electrical DC-conductivity is measured in accordance with “DC conductivity method”, as described under “Determination methods”, on a plaque of the crosslinked polymer composition at 70° C. and 30 kV/mm mean electric field from a non-degassed and 1 mm thick plaque sample of the crosslinked polymer composition; a layered structure, cable, e.g. a power cable, use of the crosslinked polymer composition and the structured layer, both, for producing a crosslinked power cable, e.g.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: June 30, 2020
    Assignee: BOREALIS AG
    Inventors: Annika Smedberg, Villgot Englund, Per-Ola Hagstrand, Virginie Erikson, Emy Silfverberg
  • Patent number: 10679768
    Abstract: A cable having one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked and has at least 90 wt % of a polymer composition, said polymer composition having: (I) 85.0 to 99.5 wt % of an LDPE; and (II) 0.5 to 15.0 wt % of an HDPE having a density of at least 940 kg/m3 or 1.5 to 15.0 wt % of an ultra-high molecular weight polyethylene having a Mw of at least 1,000,000.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: June 9, 2020
    Assignee: BOREALIS AG
    Inventors: Per-Ola Hagstrand, Villgot Englund, Thomas Gkourmpis, Mattias Andersson, Jonna Hynynen, Christian Müller
  • Patent number: 10679772
    Abstract: An electric power cable and a process for the production of the cable including a metal conductor and an electric insulation system surrounding the conductor coaxially and radially outwards of the conductor having improved electric properties. The insulation system includes an inner semi-conducting layer surrounded radially outwards by an insulation layer and wherein the insulation layer is surrounded radially outwards by an outer semi-conducting layer. The electric power cable further includes an inner water blocking material arranged in the conductor and/or to surround the conductor radially outwards and an outer water blocking material arranged radially outwards from the insulation system. An inner barrier layer is arranged as a diffusion hindering layer between the inner water blocking material and the insulation system and an outer barrier layer is arranged as a diffusion hindering layer between the insulation system and the outer water blocking material.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: June 9, 2020
    Assignee: NKT HV Cables AB
    Inventors: Hossein Ghorbani, Peter Sunnegårdh, Birgitta Källstrand, Carl-Olof Olsson, Ulf Nilsson, Per-Ola Hagstrand, Villgot Englund, Emy Silfverberg, Niklas Thorn
  • Patent number: 10679769
    Abstract: A cable comprising a conductor surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked or is cross-linked and comprises at least 90 wt % of a polymer composition, said polymer composition comprising: (I) 95.5 to 99.9 wt % of an LDPE; and (II) 0.1 to 4.5 wt % of an HDPE having a density of at least 940 kg/m3.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: June 9, 2020
    Assignee: BOREALIS AG
    Inventors: Per-Ola Hagstrand, Thomas Gkourmpis, Antonios Gitsas, Villgot Englund, Ulf Nilsson, Mattias Andersson, Jonna Hynynen, Christian Müller
  • Patent number: 10626265
    Abstract: The invention relates to a polymer composition with improved DC electrical properties, to the use of the composition for producing a cable layer and to a cable surrounded by at least one layer comprising the polymer composition.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: April 21, 2020
    Assignee: Borealis AG
    Inventors: Ulf Nilsson, Per-Ola Hagstrand, Villgot Englund, Andreas Farkas, Janis Ritums
  • Publication number: 20200115477
    Abstract: A polymer composition includes a crosslinked polyolefin with improved DC electrical properties. Prior to crosslinking, the polymer composition includes a polyolefin and peroxide, in which the peroxide is in an amount of less than 35 mmol —O—O— per kilogram of the polymer composition. A cable can be surrounded by at least one layer including the polymer composition.
    Type: Application
    Filed: December 13, 2019
    Publication date: April 16, 2020
    Inventors: Annika SMEDBERG, Birgitta KALLSTRAND, Ulf NILSSON, Per-Ola HAGSTRAND, Villgot ENGLUND, Gustavo DOMINGUEZ, Carl-Olof OLSSON, Liu RONGSHENG, Marc JEROENSE
  • Publication number: 20190348191
    Abstract: A cable comprising one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein said insulation layer comprises an LDPE homopolymer or copolymer having a density of 927 to 940 kg/m3 and wherein the conductivity of the LDPE is 5.0 fS/m or less when measured according to DC conductivity method as described under “Determination Methods”.
    Type: Application
    Filed: June 20, 2017
    Publication date: November 14, 2019
    Inventors: Per-Ola Hagstrand, Thomas Gkourmpis
  • Publication number: 20190326033
    Abstract: A cable comprising one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein said insulation layer comprises at least 90 wt % of a polymer composition, said polymer composition comprising (I) 80.0 to 99.9 wt % of an LDPE homopolymer or copolymer; and (II) 0.1 to 20.0 wt % of: (i) an ultra-high molecular weight polyethylene having a Mw of at least 1,000,000; or (ii) a single site catalysed medium density polyethylene (MDPE) having a density of 925 to 940 kg/m3 or a single site catalysed linear low density polyethylene (LLDPE) having a density of 910 to 925 kg/m3.
    Type: Application
    Filed: June 20, 2017
    Publication date: October 24, 2019
    Inventors: Per-Ola Hagstrand, Villgot Englund, Johan Andersson, Virginie Eriksson, Annika Smedberg, Ulf Nilsson, Karl Nielsen, Thomas Gkourmpis, Antonios Gitsas, Mattias Andersson, Christian Müller
  • Publication number: 20190237213
    Abstract: A cable comprising one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked and comprises at least 90 wt % of a polymer composition, said polymer composition comprising: (I) 85.0 to 99.5 wt % of an LDPE; and (II) 0.5 to 15.0 wt % of an HDPE having a density of at least 940 kg/m3 or 1.5 to 15.0 wt % of an ultra-high molecular weight polyethylene having a Mw of at least 1,000,000.
    Type: Application
    Filed: June 20, 2017
    Publication date: August 1, 2019
    Inventors: Per-Ola Hagstrand, Villgot Englund, Thomas Gkourmpis, Mattias Andersson, Jonna Hynynen, Christian Müller
  • Publication number: 20190233627
    Abstract: The invention provides a polymer composition comprising a) a low density polyethylene (LDPE); and b) a conjugated aromatic polymer. The invention also relates to cables comprising said polymer composition and the use of the polymer composition in the manufacture of an insulation layer of cable.
    Type: Application
    Filed: June 20, 2017
    Publication date: August 1, 2019
    Applicant: BOREALIS AG
    Inventors: Per-Ola Hagstrand, Thomas Gkourmpis, Antonios Gitsas, Mattias Andersson, Christian Müller
  • Patent number: 10347390
    Abstract: The present invention relates to a polymer composition comprising a polyolefin, peroxide and a sulphur containing antioxidant, wherein said peroxide is present in an amount which corresponds to X mmol —O—O—/kg polymer composition and said sulphur containing antioxidant is present in an amount which corresponds to Y mmol —OH/kg polymer composition, wherein Y1?Y?Y2, X?45 and 0.9*Y+m?X?n?k*Y, wherein Y1 is 0.50 and Y2 is 10, and m is 0.8, n is 70 and k is 4.7; and wherein said polymer composition has a melt flow rate (MFR) which is at least 1.7, and said polymer composition comprises less than 0.05% by weight (wt %) 2,4-Diphenyl-4-methyl-1-pentene; a crosslinked polymer composition, and use thereof, a power cable insulation, a power cable, useful in high voltage (HV DC) and extra high voltage (EHV DC) direct current applications, and a method for reducing electrical conductivity of a crosslinked polymer composition.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: July 9, 2019
    Assignee: BOREALIS AG
    Inventors: Villgot Englund, Per-Ola Hagstrand, Annika Smedberg, Carl-Olof Olsson, Andreas Farkas
  • Publication number: 20190206588
    Abstract: A cable comprising a conductor surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked or is cross-linked and comprises at least 90 wt % of a polymer composition, said polymer composition comprising: (I) 95.5 to 99.9 wt % of an LDPE; and (II) 0.1 to 4.5 wt % of an HDPE having a density of at least 940 kg/m3.
    Type: Application
    Filed: June 20, 2017
    Publication date: July 4, 2019
    Inventors: Per-Ola Hagstrand, Thomas Gkourmpis, Antonios Gitsas, Villgot Englund, Ulf Nilsson, Mattias Andersson, Jonna Hynynen, Christian Müller
  • Publication number: 20190169414
    Abstract: The invention relates to a polymer composition with improved DC electrical properties, to the use of the composition for producing a cable layer and to a cable surrounded by at least one layer comprising the polymer composition.
    Type: Application
    Filed: February 5, 2019
    Publication date: June 6, 2019
    Inventors: Ulf Nilsson, Per-Ola Hagstrand, Villgot Englund, Andreas Farkas, Janis Ritums
  • Patent number: 10304582
    Abstract: The present invention relates to a use of a polymer composition preferably in electrical devices as well as to a cable surrounded by at least one layer including the polymer composition.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: May 28, 2019
    Assignee: Borealis AG
    Inventors: Villgot Englund, Per-Ola Hagstrand
  • Publication number: 20190077944
    Abstract: The invention relates semiconductive polyethylene composition, for use in power cables, with improved smoothness compared to other available semiconductive polymer compositions. This invention relates to a cable with a layer comprising the semiconductive polyethylene composition.
    Type: Application
    Filed: November 21, 2016
    Publication date: March 14, 2019
    Inventors: Christer Svanberg, Fredrik Skogman, Annika Smedberg, Per-Ola Hagstrand, Niklas Thorn
  • Patent number: 10221300
    Abstract: The present invention relates to a crosslinked polymer composition, which is obtained by crosslinking a polymer composition, which polymer composition has a melt flow rate (MFR) of at least 1.7 and comprises a polyolefin, peroxide and sulphur containing antioxidant, characterized by that the crosslinked polymer composition has an Oxidation Induction Time, determined according to ASTM-D3895, ISO/CD 11357 and EN 728 using a Differential Scanning Calorimeter (DSC), which Oxidation Induction Time corresponds to Z minutes, and comprises an amount of peroxide by-products which corresponds to W ppm determined according to BTM2222 using HPLC, wherein Z1?Z?Z2, W1?W?W2, and W?p?270*Z, wherein Z1 is 0, Z2 is 60, W1 is 0 and W2 is 9500, and p is 18500; and use thereof, a power cable insulation and a power cable, useful in high voltage (HV) and extra high voltage (EHV) cable applications direct current (DC) applications.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: March 5, 2019
    Assignee: BOREALIS AG
    Inventors: Per-Ola Hagstrand, Villgot Englund, Annika Smedberg, Andreas Farkas, Carl-Olof Olsson
  • Patent number: 10208196
    Abstract: The invention relates to a polymer composition with improved DC electrical properties, to the use of the composition for producing a cable layer and to a cable surrounded by at least one layer comprising the polymer composition.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: February 19, 2019
    Assignee: BOREALIS AG
    Inventors: Ulf Nilsson, Per-Ola Hagstrand, Villgot Englund, Andreas Farkas, Janis Ritums
  • Publication number: 20180190409
    Abstract: An electric power cable and a process for the production of the cable including a metal conductor and an electric insulation system surrounding the conductor coaxially and radially outwards of the conductor having improved electric properties. The insulation system includes an inner semi-conducting layer surrounded radially outwards by an insulation layer and wherein the insulation layer is surrounded radially outwards by an outer semi-conducting layer. The electric power cable further includes an inner water blocking material arranged in the conductor and/or to surround the conductor radially outwards and an outer water blocking material arranged radially outwards from the insulation system. An inner barrier layer is arranged as a diffusion hindering layer between the inner water blocking material and the insulation system and an outer barrier layer is arranged as a diffusion hindering layer between the insulation system and the outer water blocking material.
    Type: Application
    Filed: June 23, 2015
    Publication date: July 5, 2018
    Inventors: Hossein Ghorbani, Peter Sunnegårdh, Birgitta Källstrand, Carl-Olof Olsson, Ulf Nilsson, Per-Ola Hagstrand, Villgot Englund, Emy Silfverberg, Niklas Thorn
  • Publication number: 20180148569
    Abstract: The invention relates to polymer composition comprising a polyolefin (a) and an inorganic filler (b) wherein the polyolefin (a) is obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (a) from the unreacted products and recovering the separated polyolefin (a) in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil, power cable, for example a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable.
    Type: Application
    Filed: October 27, 2015
    Publication date: May 31, 2018
    Inventors: Villgot ENGLUND, Per-Ola HAGSTRAND, Annika SMEDBERG, Ulf NILSSON
  • Patent number: 9978478
    Abstract: The present invention relates to a polymer composition, to the use of the composition for producing an electrical device, as well as to a cable surrounded by at least one layer including the polymer composition.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: May 22, 2018
    Assignee: Borealis AG
    Inventors: Johan Andersson, Villgot Englund, Per-Ola Hagstrand, Ulf Nilsson, Annika Smedberg, Thomas Steffl, Johannes Wolfschwenger