Transmission line and manufacture method of isolating layer thereof

    公开(公告)号:US12087466B2

    公开(公告)日:2024-09-10

    申请号:US17473231

    申请日:2021-09-13

    申请人: Tsun Yi Ko

    发明人: Tsun Yi Ko

    摘要: A transmission line includes a conductor for signal transmission and an isolating layer covering the conductor. The isolating layer includes a first isolating strand group and a second isolating strand group. The first isolating strand group is wound in a way that forms an S-twist around the conductor along an axis direction the conductor, and the second isolating strand group is wound in a way that forms a Z-twist around the conductor along the axis direction. In an interval from a first position to a second position, including the first position, the first isolating strand group continuously overlaps an outside of the second isolating strand group, and in an interval from the second position to a third position, including the second position, the second isolating strand group continuously overlaps an outside of the first isolating strand group.

    CROSSLINKABLE POLYOLEFIN COMPOSITIONS FOR WIRE AND CABLE APPLICATIONS

    公开(公告)号:US20240240006A1

    公开(公告)日:2024-07-18

    申请号:US18289819

    申请日:2022-05-18

    申请人: Borealis AG

    IPC分类号: C08L23/08 C08F210/02

    摘要: The present invention relates to a crosslinkable polyolefin composition for wire and cable applications, and particularly for low voltage (LV) and medium voltage (MV) cables, to a cable comprising said compositions and to the use of said compositions for increasing the tensile strength and/or flexibility of a cable. The crosslinkable polyolefin composition of the invention comprises (a) 50 to 99 wt. %, based on the total polyolefin composition, of one or more ethylene copolymer(s) containing monomer units with polar groups and monomer units with hydrolysable silane groups, wherein the monomer units with polar groups are present in an amount of from 1 to 25 mol. % based on the total polyolefin composition, and (b) 1 to 50 wt. %, based on the total polyolefin composition, of a copolymer of ethylene and a C3 to C8 alpha-olefin co-monomer having a density of from 850 to 970 kg/m3 and a MFR2.16 of from 0.1 to 50 g/10 min. determined according to ISO 1133 at a temperature of 190° C. and a load of 2.16 kg. A cable comprising such a crosslinkable polyolefin composition and its use for increasing the tensile strength and/or flexibility of a cable are disclosed as well.

    POLYPROPYLENE COMPOSITION FOR CABLE INSULATION

    公开(公告)号:US20240199865A1

    公开(公告)日:2024-06-20

    申请号:US18549717

    申请日:2022-03-23

    申请人: BOREALIS AG

    IPC分类号: C08L23/14 C08K5/1575 H01B3/44

    摘要: The present invention relates to a polypropylene composition comprising (A) a copolymer of propylene and comonomer units selected from ethylene and alpha-olefins having from 4 to 12 carbon atoms with a total amount of comonomer units of from 10.0 to 16.0 wt %, based on the total amount of monomer units in the polypropylene composition, and (B) an alpha-nucleating agent; wherein the polypropylene composition has a xylene cold soluble (XCS) fraction in a total amount of from 25.0 to 50.0 wt %, based on the total weight amount of the polypropylene composition, with an amount of comonomer units of at least 23.0 wt %, based on the total amount of monomer units in the xylene cold soluble (XCS) fraction, a melt flow rate MFR2 of from 0.5 to 5.0 g/10 min, and a flexural modulus of not more than 470 MPa, an article comprising said polypropylene composition, preferably a cable comprising an insulation layer comprising said polypropylene composition and the use of said polypropylene composition as cable insulation for medium and high voltage cables.