Laminate having a high oxygen transmission rate
AssigneeCryovac, Inc.
InventorEdward Mumpower
Life of this patent
Estimating the term…
Abstract
The invention is a trap-printable laminate having an OTR that is sufficiently high to help facilitate the passage of oxygen through the laminate without sacrificing the properties of the laminate that are necessary for lamination, printing, and heat sealing to a support member, such as a tray. In one embodiment, the laminate has an OTR of at least 4,000, cc at STP/m2/24 hr/atm. The laminate may be particularly useful in high oxygen packaging applications where it may be desirable to have a product bloom from exposure to oxygen. The high OTR of the laminate may allow oxygen to pass through the laminate and interact with portions of a product that may be in direct contact with the laminate.
Claims23
A laminate comprising:
- a first film having inner and outer surfaces, an oxygen transmission rate of at least 7,500 cc at STP/m2/24 hr/atm and a modulus of at least 20,000 psi;
- and
- a second film having inner and outer surfaces, an oxygen transmission rate of at least 7,000 cc at STP/m2/24 hr/atm and a modulus of at least 45,000 psi, wherein the inner surface of said first film is laminated to the inner surface of said second film to produce a laminate having an oxygen transmission rate of at least 4,000 cc at STP/m2/24 hr/atm.
A trap-printed laminate comprising:
- a first film having an oxygen transmission rate of at least 16,000 cc at STP/m2/24 hr/atm and a modulus of at least 25,000 psi;
- a second film adhesively bonded to said film and having an oxygen transmission rate of at least 13,000 cc at STP/m2/24 hr/atm and a modulus of at least 100,000 psi;
- and
- an image disposed between said first and second films, wherein said laminate has an oxygen transmission rate of at least 5,000 cc at STP/m2/24 hr/atm.
A package for sealing a product therein, said package comprising:
- a support member defining an interior space for disposing a product therein;
- a laminate bonded to said support member such that the product is enclosed between said support member and said laminate, said laminate comprising:
- 1) a first film having an oxygen transmission rate of at least 7,500 cc at STP/m2/24 hr/atm and a modulus of at least 20,000 psi;
- 2) a second film having an oxygen transmission rate of at least 7,000 cc at STP/m2/24 hr/atm and a modulus of at least 45,000 psi;
- and
- 3) an image disposed between said first and second films, wherein said laminate has an oxygen transmission rate of at least 4,000 cc at STP/m2/24 hr/atm.
Dependencies are inferred from the claim text.