- Patent Title: Use of high barrier and peelable polyester film for tray lidding, dual ovenable packaging applications and tray lidding dual ovenable packages obtained therefrom
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Application No.: US16754568Application Date: 2018-10-09
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Publication No.: US11806981B2Publication Date: 2023-11-07
- Inventor: Vittorio Perego , Serena Stracuzzi
- Applicant: Cryovac, LLC
- Applicant Address: US NC Charlotte
- Assignee: Cryovac, LLC
- Current Assignee: Cryovac, LLC
- Current Assignee Address: US NC Charlotte
- Agent Jason R. Womer
- Priority: EP 195475 2017.10.09
- International Application: PCT/EP2018/077516 2018.10.09
- International Announcement: WO2019/072872A 2019.04.18
- Date entered country: 2020-04-08
- Main IPC: B32B27/08
- IPC: B32B27/08 ; B32B27/36 ; B32B7/12 ; B65D43/00 ; B65D81/34 ; B32B27/32

Abstract:
The present invention relates to the use of a laminate film, which can be transparent or white or colored (as described in the specification), comprising a first bi-axially oriented polyester film laminated to a second bi-axially oriented polyester film, wherein said first bi-axially oriented polyester film comprises a polyester base film comprising at least one polyester layer comprising one or more co-polyester(s) comprising units of terephthalic acid and at least a diol, said second bi-axially oriented polyester film comprises a polyethylene terephthalate base film, an inorganic vapor deposited layer, and an optional outer protective layer directly adhered to said inorganic vapor deposited layer, said inorganic vapor deposited layer comprising an inorganic compound selected from the group consisting of oxides, nitrides and oxynitrides of Al, Ti, Si, Zn, Sn, and mixture thereof, and a glue layer is interposed between said first bi-axially oriented polyester film and said second bi-axially oriented polyester film, and wherein said laminate film has (i) a tear ratio, between the tear initiation force measured according to ASTM D-1004 and said first bi-axially oriented polyester film total thickness, of at least 37 gf/micron in at least one of longitudinal and transverse direction, and (ii) a free shrink measured according to modified IS011501-95 at 180° C. for 5 minutes lower than 5% in at least one of longitudinal and transverse direction, as a lid in tray lidding applications and to the tray lidding packages made therefrom.
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