US 11,806,981 B2
Use of high barrier and peelable polyester film for tray lidding, dual ovenable packaging applications and tray lidding dual ovenable packages obtained therefrom
Vittorio Perego, Busto Arsizio (IT); and Serena Stracuzzi, Parabiago (IT)
Assigned to Cryovac, LLC, Charlotte, NC (US)
Appl. No. 16/754,568
Filed by Cryovac, LLC, Charlotte, NC (US)
PCT Filed Oct. 9, 2018, PCT No. PCT/EP2018/077516
§ 371(c)(1), (2) Date Apr. 8, 2020,
PCT Pub. No. WO2019/072872, PCT Pub. Date Apr. 18, 2019.
Claims priority of application No. 17195475 (EP), filed on Oct. 9, 2017.
Prior Publication US 2020/0254724 A1, Aug. 13, 2020
Int. Cl. B32B 27/08 (2006.01); B32B 27/36 (2006.01); B32B 7/12 (2006.01); B65D 43/00 (2006.01); B65D 81/34 (2006.01); B32B 27/32 (2006.01)
CPC B32B 7/12 (2013.01) [B32B 27/08 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); B65D 81/343 (2013.01); B65D 81/3446 (2013.01); B32B 2250/244 (2013.01); B32B 2307/308 (2013.01); B32B 2307/31 (2013.01); B32B 2307/4023 (2013.01); B32B 2307/412 (2013.01); B32B 2307/518 (2013.01); B32B 2307/724 (2013.01); B32B 2307/746 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A dual ovenable package comprising a container, a product and a lid sealed onto said container, wherein the lid is a laminate film, which is either
a transparent laminate film 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 wherein
a glue layer is interposed between said first bi-axially oriented polyester film and the inorganic vapor deposited layer or the protective layer, if present, of said second bi-axially oriented polyester film,
or
a white or colored laminate film 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 wherein
a glue layer is interposed between said first bi-axially oriented polyester film and the inorganic vapor deposited layer or the protective layer, if present, of said second bi-axially oriented polyester film, and
an ink layer is interposed between said first bi-axially oriented polyester film and the glue layer and/or between the glue layer and said protective layer of said second bi-axially oriented polyester film,
wherein said laminate film has
a tear ratio, between the tear initiation force measured according to ASTM D-1004 and the total thickness of the laminate film, of at least 37 gf/micron in at least one of longitudinal and transverse direction, and
a free shrink measured according to modified ISO11501-95 at 180° C. for 5 minutes lower than 5% in at least one of longitudinal and transverse direction.