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:
Aug. 26, 2014
Filed:
Aug. 28, 2007
Scott Beckwith, Greer, SC (US);
Frank Bryan Edwards, Simpsonville, SC (US);
Janet Rivett, Simpsonville, SC (US);
Cynthia Louise Ebner, Greer, SC (US);
Thomas Kennedy, Simpsonville, SC (US);
Rachel Mcdowell, Moore, SC (US);
Drew V. Speer, Simpsonville, SC (US);
Scott Beckwith, Greer, SC (US);
Frank Bryan Edwards, Simpsonville, SC (US);
Janet Rivett, Simpsonville, SC (US);
Cynthia Louise Ebner, Greer, SC (US);
Thomas Kennedy, Simpsonville, SC (US);
Rachel McDowell, Moore, SC (US);
Drew V. Speer, Simpsonville, SC (US);
Cryovac, Inc., Duncan, SC (US);
Abstract
The present invention provides a multilayer film having an active oxygen barrier multilayer core comprising at least one of 1) an active oxygen barrier layer is sandwiched between two passive oxygen barrier layers, or 2) a passive oxygen barrier layer is sandwiched between two active oxygen barrier layers. In one embodiment, the active barrier layer comprises a composition that is a blend of a thermoplastic resin (A) having carbon-carbon double bonds substantially in its main chain, a transition metal salt (B), and an oxygen barrier polymer (C). In some embodiments the active barrier layer may also include a compatibilizer (D). The passive oxygen barrier layers help to maintain the oxygen barrier properties of the multilayer film after the oxygen absorbing capacity of the active barrier layer has been exhausted. As a result, the useful shelf life of the film can be extended.