Microwaveable Pan and Cover with Susceptor Layers for Food Browning
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Solution Overview
Problem
Microwave cooking containers struggle to brown food effectively, lacking the ability to achieve the crispy surfaces and taste associated with stovetop cooking, while also requiring durability and ease of cleaning to maintain convenience and safety.
Innovation Solution
A microwaveable container design featuring a pan and pan cover with over-molded heating layers composed of susceptor powder dispersed in a polymer matrix, which converts microwave energy into heat energy, combined with a durable metal construction and anti-stick coatings for efficient food cooking and easy cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If microwaveable containers use traditional heating methods, then they are simple in design and easy to manufacture, but they cannot brown food effectively to achieve crispy surfaces
Solution Approach 1:
The patent applies composite materials by integrating susceptor particles (magnetic or electrically conductive) into the polymer matrix of the container wall. This composite structure enables the container to convert microwave energy into heat locally, achieving browning and crisping surfaces without adding separate heating elements, thus resolving the contradiction between temperature capability and structural complexity.
Solution Approach 2:
The patent changes the physical-chemical parameters of the container material by incorporating susceptors with specific magnetic or electrical properties. These parameter changes allow the material to interact with microwave fields and generate heat, enabling browning functionality while maintaining the integrity of the container structure.
2Temperature
If microwaveable containers incorporate browning capability through additional layers or components, then food browning is achieved, but the container becomes less durable and more difficult to clean
Solution Approach 1:
The patent merges the browning function with the container wall itself by embedding susceptors within the polymer matrix. This integration eliminates the need for separate heating layers or components that could delaminate or fail, thereby maintaining container durability while achieving effective food browning.
Solution Approach 2:
The composite material structure combines the structural integrity of the polymer with the heat-generating properties of susceptors. This unified composite layer maintains the container's mechanical strength and durability while providing the necessary temperature capability for browning, avoiding the reliability issues associated with multi-layer constructions.
3Temperature
If microwaveable containers use complex multi-component structures to achieve browning, then food browning is improved, but the container requires disassembly for cleaning, reducing convenience
Solution Approach 1:
The patent combines the browning functionality directly into the container wall through susceptor-polymer composites, creating a single-integration structure. This eliminates the need for disassembly into multiple cleanable components, allowing the entire container to be washed together in a dishwasher while maintaining effective browning capability.
4Temperature
If microwaveable containers incorporate susceptor layers for browning, then food browning is achieved, but the outer contact surfaces become softer and more susceptible to damage
Solution Approach 1:
The patent applies local quality by concentrating susceptor particles within the polymer matrix at specific locations (inner or outer surfaces) where browning is needed, while maintaining the structural polymer composition in areas requiring mechanical strength. This localized distribution allows the container to achieve both browning capability and surface durability.
Solution Approach 2:
The composite material structure provides a balance between functionality and strength by combining the heat-generating susceptor particles with the structurally sound polymer matrix. The polymer phase maintains surface hardness and resistance to damage, while the susceptor phase enables browning, resolving the contradiction between these two properties.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The container effectively browns food by transferring heat energy from the susceptor layers to the metal surfaces, replicating stovetop cooking results while ensuring durability and ease of cleaning, ensuring food is cooked to a satisfying texture and appearance.
Implementation Method 1
The first and second heating layers independently comprise a susceptor powder selected from manganese zinc ferrite, nickel zinc ferrite, strontium ferrite or mixtures thereof, and a polymer matrix selected from a silicone rubber, a liquid crystal polymer, a polyphenylene sulfide polymer or mixtures thereof, the susceptor powder being dispersed in the polymer matrix
Implementation Method 2
a susceptor powder selected from manganese zinc ferrite, nickel zinc ferrite, strontium ferrite or mixtures thereof
Implementation Method 3
The upper surface of the first heating layer being attached to the bottom lower surface... The upper surface of the first heating layer being attached to the bottom lower surface
Data Source
AI summary
A microwaveable container comprising a pan and a pan cover, the pan comprising a bottom, a continuous wall, a rim, a first heating layer and a first polymeric layer; the pan cover comprising an upper surface, a lower surface, an outer side edge, a second polymeric layer, and a second heating layer, the first heating layer being attached to the pan bottom, the second heating layer being attached to the pan cover, and wherein the first polymeric layer is attached to the rim, the first heating layer and the pan bottom, the second polymeric layer being attached to the pan cover and the second heating layer; the first and second heating layers independently comprising: a susceptor powder selected from manganese zinc ferrite, nickel zinc ferrite, strontium ferrite or mixtures thereof; and a polymer matrix selected from a silicone rubber, a liquid crystal polymer, a polyphenylene sulfide polymer or mixtures thereof.