The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 1983
Filed:
Oct. 10, 1980
Applicant:
Inventors:
Gunther Crass, Taunusstein, DE;
Hartmut Hensel, Wiesbaden, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Primary Examiner:
Int. Cl.
CPC ...
H01G / ;
U.S. Cl.
CPC ...
361313 ; 2641 / ; 2642101 ; 2642105 ; 2642107 ; 361314 ; 361323 ; 427 79 ; 428141 ; 428156 ; 428163 ; 428164 ; 428167 ; 428409 ; 428461 ;
Abstract
Disclosed is a film for use in the field of electrical insulation comprising a biaxially stretched rough polypropylene film comprising a plurality of first zones of high roughness, the first zones having a relatively high number of .alpha.-crystallites; and a plurality of second zones of substantially lesser roughness, the second zones having a substantially lesser number of .alpha.-crystallites than the first zones, the first zones being adjacent to the second zones and the adjacent first and second zones forming fine channels between each other. Also disclosed is a method for producing this film.