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:
Mar. 07, 2006
Filed:
Jun. 11, 2003
Wolfgang Lohwasser, Gailingen, DE;
Olaf Frei, Siblingen, CH;
Wolfgang Lohwasser, Gailingen, DE;
Olaf Frei, Siblingen, CH;
Alcan Technology & Management, Neuhausen am Rheinfall, CH;
Abstract
The process for preparing a composite film for packaging purposes, that includes coextruding polyethylene terephthalate (PET) and polyethylene-2, 6-naphthalate (PEN) to form a film of polyethylene-2,6-naphthalate. On at least one of the at least one PEN-coated side, a ceramic layer of SiO, where x is number between 0.9 and 2, is deposited by means of the thin-film vacuum process through the simultaneous vaporization of silicon dioxide (SiO) and metallic silicon, or by the vaporization of silicon monoxide (SiO) in a vacuum. Each of the at least one ceramic layers of SiOhaving a thickness of 10 nm to 200 nm. The resultant composite film retains effective permeability barrier effect for water vapor and gases after sterilization in a water bath or in water vapor at a temperature of more than 90° C.