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:
Sep. 08, 1981
Filed:
Oct. 23, 1978
Applicant:
Inventors:
Fosco Bordini, Terni, IT;
Luigi Mauri, Terni, IT;
Assignee:
Moplefan S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ;
U.S. Cl.
CPC ...
428 35 ; 4274123 ; 428501 ; 428516 ; 428518 ; 428520 ; 428524 ; 428910 ;
Abstract
Films consisting essentially of alpha-olefin polymers, such as normally solid polypropylene consisting essentially of recurring propylene units and having a substantial crystalline polypropylene content, and in particular isotactic polypropylene, are coated with a ketonic resin resulting from the polycondensation of aldehydes with ketones, which coating renders the films readily thermoweldable and/or impervious to gases, vapors and the like. The coated films are useful for the manufacture of containers, covers, small bags, vessels and in general for the manufacture of articles useful in the packaging industry.