公开(公告)号：US20220033631A1

公开(公告)日：2022-02-03

申请号：US17413612

申请日：2019-12-20

Applicant: BOREALIS AG

Inventor： Dietrich GLOGER ,  Hermann BRAUN ,  Antonios GITSAS ,  Davide TRANCHIDA ,  Franciscus JACOBS ,  Wolfram STADLBAUER

IPC: C08L23/12 ,  C08L23/14 ,  C08L23/20 ,  B29C55/16 ,  B29C48/00 ,  C08J5/18 ,  H01G4/18

Abstract: The present invention is directed to a biaxially oriented polypropylene (BOPP) film with improved breakdown strength and to a capacitor comprising an insulation film comprising a layer of the biaxially oriented polypropylene film of the present invention. The present invention is further directed to a process for producing a biaxially oriented polypropylene film. Finally, the present invention is further directed to the use of a biaxially oriented polypropylene film of the present invention as layer of an insulation film of a capacitor. The BOPP film comprises a polypropylene composition, wherein the polypropylene composition comprises a high isotactic homopolymer of propylene and a polymeric α-nucleating agent. The BOPP film has a dielectric breakdown field strength Eb63.2 of at least 595 kV/mm. The process for producing a biaxially oriented polypropylene film comprises the steps of extruding a polypropylene composition to a flat film and orienting the flat film simultaneously in the machine direction and in the transverse direction.

公开(公告)号：US20230227637A1

公开(公告)日：2023-07-20

申请号：US18017274

申请日：2021-07-23

Applicant: BOREALIS AG

Inventor： Felice DE SANTIS ,  Matthias HOFF ,  Kalin SIMEONOV ,  Davide TRANCHIDA ,  Martin NEUHEIMER ,  Stefan POLLHAMMER

IPC: C08L23/08 ,  C08F210/16 ,  C08F2/06 ,  C08F2/34 ,  C08F4/659 ,  C08J5/18

CPC classification number: C08L23/0815 ,  C08F210/16 ,  C08F2/06 ,  C08F2/34 ,  C08F4/659 ,  C08J5/18 ,  C08L2203/16

Abstract: The present invention relates to a new multimodal ethylene copolymer (P), to the use of the copolymer in film applications and to a film comprising the copolymer of the invention.