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:
Jun. 20, 1989
Filed:
Oct. 17, 1988
Applicant:
Inventor:
Marcel Eyraud, Lyons, FR;
Assignee:
Rhone-Poulenc Films, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
428213 ; 264171 ; 2641772 ; 428220 ; 428323 ; 428480 ;
Abstract
A thick composite polyester film of between 40 and 300 microns in thickness being crystalline or semicrystalline comprising drawn unfilled layer (A) of thickness e, covered on at least one surface thereof with a thin drawn filled layer (B) of thickness e.sub.2, having an overall roughness greater than 0.3 microns and being filled with inert particles wherein the volume median diameter of the filler being at least equal to the thickness of layer (B); the thickness ratio of layers (A) and (B) denoted by e.sub.1 /e.sub.2 is lower than 5% and the percentage of scattered light transmitted from the composite film is lower than 7.