公开(公告)号：US20160304681A1

公开(公告)日：2016-10-20

申请号：US15101837

申请日：2014-12-18

Applicant: BOREALIS AG

Inventor： Gregory POTTER ,  Dietrich GLOGER ,  Thomas HORILL ,  Antonis GITSAS ,  Franciscus JACOBS ,  Matthew PARKINSON

IPC: C08J5/18 ,  B29C55/10

CPC classification number: C08J5/18 ,  B29C55/10 ,  B29C55/12 ,  B29K2023/14 ,  B29L2007/008 ,  C08F210/16 ,  C08J2323/12 ,  C08J2323/14 ,  C08F110/06 ,  C08F4/6543 ,  C08F210/06 ,  C08F2/001 ,  C08F210/02 ,  C08F2500/12 ,  C08F2500/26

Abstract: The present invention relates to a new biaxially oriented polypropylene (BOPP) film, a process for the preparation of such film as well as the use of a polypropylene for the preparation of such film and an article comprising such film.

Abstract translation: 本发明涉及新的双轴取向聚丙烯（BOPP）膜，制备这种膜的方法以及使用聚丙烯制备这种薄膜，以及包含这种薄膜的制品。

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.