Label for modified atmosphere packaging
Maintenance of conditions optimal to perishable materials within a package during shipment will prolong the lifetime of the goods for shipment. The present invention provides a system for mitigating spoilage of perishable materials. The system comprises a container defining a compartment for storage of perishable materials, the container further defining an opening for providing communication between the compartment and an outside environment. A film cooperates with the container to seal the opening of the container and control flow of gas and water vapor transfer between the compartment and the outside environment.
1. A system for mitigating spoilage of perishable produce, the system comprising:
a container defining a compartment for storage of perishable produce;
a lid for the container, the lid comprising a recessed surface relative to a raised surface of the rest of the lid, the recessed surface defining a plurality of perforations in the recessed surface; and
a label comprising a polyamide film and a hydrophilic ink, the polyamide film comprising:
an oxygen transfer rate of 20-1245 cm 3 /m 2 /day atm at 25° C. and 0% relative humidity,
a carbon dioxide permeability of 60-100 cm 3 /m 2 /day atm at 25° C. and 0% relative humidity,
a water vapor transmission rate of between 170 and 470 g m 2 /day at 38° C. and 0% relative humidity,
wherein the polyamide film sealed to the raised surface of the lid and covering the recessed surface of the lid to form a space between the polyamide film and the recessed surface
a sachet positioned in the space between the recessed surface of the lid and the polyamide film, the sachet containing an oxidizing compound.
2. The system of claim 1 , wherein the film is transparent.
3. The system of claim 1 , wherein the film has a thickness of 500-10,000 μm.
4. The system of claim 1 , wherein the film has a surface area of 90-500 cm 2 .
5. The system of claim 1 , wherein the container is formed from a rigid material formed to maintain shape when carrying perishable produce.
6. The system of in claim 1 , wherein the film is comprised of mixtures of nylon with other polymeric and non-polymeric components.
7. The system of claim 6 , wherein the film is comprised of one or more of nylon-6, nylon-66, nylon-6/66 or nylon-6/12.
8. The system of claim 1 , wherein the oxidizing compound comprises sodium chlorite, citric acid and an inert carrier.
9. A system for mitigating spoilage of perishable produce, the system comprising:
a container defining a compartment for storage of perishable produce and/or flowers and having a first opening;
a lid attached to the first opening, the lid defining a recessed surface therein and defining a second opening further defined by a plurality of perforations in the recessed surface in communication with the compartment;
a label comprising a polyamide film and a hydrophilic ink, the polyamide film comprising:
an oxygen transfer rate of 20-36 cm 3 /m 2 /day atm at 25° C. and 0% relative humidity,
a carbon dioxide permeability of 60-100 cm 3 /m 2 /day atm at 25° C. and 0% relative humidity,
a water vapor transmission rate of between 170 and 470 g m 2 /day at 38° C. and 0% relative humidity,
wherein the polyamide film is sealed to the lid and covering the recessed surface to form a space between the polyamide film and the second opening, and
a sachet positioned in the space between the recessed surface of the lid and the polyamide film, the sachet containing an oxidizing compound.
10. The system of claim 9 , wherein the hydrophilic ink forms a graphic and and/or identifying information.
11. The system of claim 9 , wherein the water vapor transfer rate of the film increases with an increase in temperature.
12. The system of claim 9 , wherein the lid comprises a recessed surface relative to a surrounding raised surface of the lid, the second opening being defined by the recessed surface and wherein the film is attached to the raised surface of the lid to cover and seal a space defined by the recessed surface and walls between the raised surface and the recessed surface.
13. The system of claim 12 , wherein the recessed surface defines a plurality of perforations.
14. The system of claim 9 , wherein the film seals within the compartment antimicrobial vapors from the sachet.
15. The system of claim 9 , wherein the oxidizing compound comprises sodium chlorite, citric acid and an inert carrier.