公开(公告)号：US11011287B2

公开(公告)日：2021-05-18

申请号：US15106011

申请日：2014-08-19

Applicant: BOREALIS AG

Inventor： Peter Sunnegårdh ,  Marc Jeroense ,  Anders Gustafsson ,  Pär Lilja ,  Per-Ola Hagstrand ,  Villgot Englund ,  Annika Smedberg ,  Ulf Nilsson ,  Johan Andersson ,  Virginie Eriksson ,  Jonas Jungqvist ,  Jonny Brun

IPC: H01B9/02 ,  H01B3/44 ,  H01B13/24

Abstract: A transmission cable includes a conductor or a bundle of conductors extending along a longitudinal axis, which is circumferentially covered by an insulation layer having an extruded insulation material, whereby the transmission cable passes the electrical type test as specified in Cigré TB496, whereby the rated voltage U0 is 450 kV or more. The type test includes subjecting the power cable to a DC voltage of 1.85*U0 during 10 to 15 cycles at negative polarity, followed by a polarity reversal with another 10 to 15 cycles at positive polarity at a DC voltage of 1.85*U0, followed by additional 2 to 5 cycles during at least 4 to 10 days at positive polarity, and wherein U0 is 450 kV, or 525 kV, or more.

公开(公告)号：US20220403149A1

公开(公告)日：2022-12-22

申请号：US17773972

申请日：2020-12-07

Applicant: Borealis AG

Inventor： Susanne Nilsson ,  Lars Efraimsson ,  Jonas Jungqvist ,  Victoria Karlsson ,  Bemt-Åke Sultan

IPC: C08L23/08 ,  H01B3/44 ,  H01B7/295

Abstract: The present invention relates to a flame retardant polymer composition comprising at least the following components A) 2.0 to 49.8 wt.-% based on the overall weight of the polymer composition of a copolymer comprising ethylene units and units selected from the group consisting of methyl acrylate, methyl methacrylate and mixtures thereof; B) 0.1 to 6.0 wt.-% based on the overall weight of the polymer composition of a polyethylene and/or polypropylene containing units originating from maleic acid anhydride; C) 0.1 to 5.0 wt.-% based on the overall weight of the polymer composition of a silicone fluid and/or a silicon gum; D) 50.0 to 70.0 wt.-% based on the overall weight of the polymer composition of a magnesium hydroxide; and E) 0 to 17.0 wt.-% based on the overall weight of the polymer composition of a copolymer of ethylene and a C4 to C10 alpha olefin comonomer having a density in the range of 860 kg/m3 to 950 kg/m3 determined according to ISO 1183; wherein the weight proportions of components A) to E) add up to 100 wt.-%. In addition, the present invention refers to a wire or cable comprising at least one layer comprising the polymer composition according to the present invention and to the use of the polyolefin composition according to the present invention as a flame retardant layer of a wire or cable.