公开(公告)号：US6094337A

公开(公告)日：2000-07-25

申请号：US29703

申请日：1998-03-06

申请人： Takashi Ueda ,  Itsuo Nagai ,  Shigeru Tanaka ,  Takumi Hirano

发明人： Takashi Ueda ,  Itsuo Nagai ,  Shigeru Tanaka ,  Takumi Hirano

IPC分类号： C08J5/18 ,  H01G4/18 ,  H01G4/26

CPC分类号： C08J5/18 ,  H01G4/18 ,  C08J2323/12

摘要： Biaxially oriented polypropylene film excellent in heat resistance and long-term dielectric properties at high temperatures, reduced insulation defects, and excellent impregnation of insulating oil into the clearance between film layers and swelling resistance when immersed in the insulating oil; in a capacitor having excellent heat resistance, dielectric properties, corona resistance, long-term thermal durability and electric current resistance, with the polypropylene film serving as dielectric; the film is a biaxially oriented polypropylene film characterized by 98 to 99.5% isotacticity, 99% or more in isotactic pentad fraction, 30 ppm or less in ash content and 0.01 to 0.4 .mu.m in center line average surface roughnesses on both sides.

摘要翻译： PCT No.PCT / JP97 / 02791 Sec。 371日期1998年3月6日 102（e）1998年3月6日PCT PCT 1997年8月8日提交PCT公布。 第WO98 / 06776号公报 日期1998年2月19日双轴取向聚丙烯薄膜耐高温性能好，耐高温介电性能好，绝缘性差，绝缘油浸入绝缘油中时，绝缘油浸入薄膜层之间的间隙以及耐溶胀性; 在具有优异的耐热性，介电特性，电晕电阻，长期耐热性和耐电流性的电容器中，聚丙烯膜用作电介质; 该膜是双轴取向的聚丙烯膜，其特征在于98〜99.5％的全同立构规整度，99％以上的全同立构五单元组分数，30ppm以下的灰分和0.01〜0.4μm的中心线平均表面粗糙度。

公开(公告)号：US5724222A

公开(公告)日：1998-03-03

申请号：US703328

申请日：1996-08-27

申请人： Takumi Hirano ,  Itsuo Nagai ,  Shigeru Tanaka ,  Masayoshi Asakura

发明人： Takumi Hirano ,  Itsuo Nagai ,  Shigeru Tanaka ,  Masayoshi Asakura

IPC分类号： B32B27/32 ,  C08J5/18 ,  C08L23/12 ,  C08L101/00 ,  H01G4/18 ,  H01G4/26

CPC分类号： C08J5/18 ,  H01G4/18 ,  C08J2323/10

摘要： The present invention relates to a biaxially oriented polypropylene film and a capacitor made thereof. The biaxially oriented polypropylene film of the invention is a biaxially oriented polypropylene film that is 98-99.5% in isotacticity, above 99% in isotactic pentad fraction, and 1-4% in the sum of the machine- and transverse-direction heat shrinkage at 120.degree. C., or a biaxially oriented polypropylene film that is less than 10 ppm.multidot.% in the product of the film's ash content and internal haze and is above 99% in isotactic pentad fraction. With this constitution, the biaxially oriented polypropylene film of the present invention has good dielectric properties at high temperatures. Furthermore, the capacitor of the invention can be used safely for a long life at operating temperatures higher by up to 20.degree. C. than the maximum operating temperature of 85.degree. C. of the conventional biaxially oriented polypropylene films.

摘要翻译： 本发明涉及双轴取向聚丙烯薄膜及其制成的电容器。 本发明的双轴取向聚丙烯薄膜是双轴取向聚丙烯薄膜，其全同立构规整度为98-99.5％，全同立构五单元组分率高于99％，在横向热收缩率的总和中为1-4％ 或薄膜灰分和内部雾度的乘积小于10ppm x％的双轴取向聚丙烯薄膜，并且在全同立构五单元组分数中高于99％。 采用这种结构，本发明的双轴取向聚丙烯膜在高温下具有良好的介电性能。 此外，本发明的电容器可以在比常规双轴取向聚丙烯膜的最高工作温度85℃高20℃的操作温度下安全使用。