Deactivation of Microwave Interactive Material
AssigneeGraphic Packaging International, Inc.
InventorsJeffrey T. Sloat, William Gilpatrick
Life of this patent
Estimating the term…
Abstract
Microwave energy interactive material is partially coated with thermoset polymeric material. The thermoset polymeric material is cured on a first portion of the microwave energy interactive material. A second portion of the microwave energy interactive material is neither covered by nor protected by the cured thermoset polymeric material. A deactivating agent is applied to the coated microwave energy interactive material, so that the agent deactivates the second portion of the microwave energy interactive material into a microwave energy transparent area. The cured thermoset polymeric material protects the first portion of the microwave energy interactive material from the agent, so that it remains microwave energy interactive.
Claims22
A packaging material, comprising:
- a substrate;
- microwave energy interactive material on the substrate;
- microwave energy transparent material on the substrate and adjacent to the microwave interactive material on the substrate, the microwave energy transparent material comprising the microwave energy interactive material in a deactivated condition;
- and
- thermoset polymeric material on the microwave energy interactive material, the thermoset polymeric material and the microwave energy interactive material being superposed with one another.
A method of at least forming a microwave energy transparent area in a layer of microwave energy interactive material, the method comprising:
- partially coating the layer of microwave energy interactive material with thermoset polymeric material, comprising curing the thermoset polymeric material on a first portion of the layer of microwave energy interactive material so that
- the cured thermoset polymeric material is operative to protect the first portion of the layer of microwave energy interactive material, and
- a second portion of the layer of microwave energy interactive material is neither covered by nor protected by the cured thermoset polymeric material;
- applying an agent to the coated layer of the microwave energy interactive material, so that
- the agent transforms the second portion of the layer of microwave energy interactive material into a microwave energy transparent area, and
- the cured thermoset polymeric material protects the first portion of the layer of microwave energy interactive material from the agent, so that the first portion of the layer of microwave energy interactive material remains microwave energy interactive.
A method of at least forming a microwave energy transparent area in a layer of microwave energy interactive material, the method comprising:
- partially coating the layer of microwave energy interactive material with thermoset polymeric material, comprising printing the thermoset polymeric material onto a first portion of a layer of microwave energy interactive material;
- curing the thermoset polymeric material on the first portion of the layer of microwave energy interactive material, comprising exposing the thermoset polymeric material on the first portion of the layer of microwave energy interactive material to ultraviolet light, so that
- the cured thermoset polymeric material is operative to protect the first portion of the layer of microwave energy interactive material, and
- a second portion of the layer of microwave energy interactive material is neither covered by nor protected by the cured thermoset polymeric material;
- applying a deactivating agent to the coated layer of the microwave energy interactive material, so that
- the agent deactivates the second portion of the layer of microwave energy interactive material into a microwave energy transparent area, and
- the cured thermoset polymeric material protects the first portion of the layer of microwave energy interactive material from the agent, so that the first portion of the layer of microwave energy interactive material remains microwave energy interactive.
Dependencies are inferred from the claim text.