Flexible Microwave Cooking Package with Conformable Susceptor
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Solution Overview
Problem
Existing microwave cooking packages often fail to position cooking surfaces sufficiently close to the food item for effective browning or crisping, limiting the ability to replicate conventional frying, baking, or grilling results.
Innovation Solution
A flexible package design featuring a tray and a cover with microwave interactive material, including a susceptor, that conforms to the shape of the food item through foldable sections, allowing for closer proximity and efficient heating by expanding insulating cells when exposed to microwave energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed-shape package is used, then the package structure is simple and easy to manufacture, but the cooking surface cannot be positioned sufficiently close to the food item for effective browning or crisping
Solution Approach 1:
The package transitions from a fixed rigid structure to a dynamic flexible structure that can adapt its shape. The microwave-responsive material causes the package to inflate and conform to the food item's shape during cooking, dynamically adjusting the cooking surface proximity to achieve optimal browning and crisping contact.
Solution Approach 2:
The package utilizes microwave energy to change its physical state and dimensions. Exposure to microwave radiation causes the package material to inflate and change shape, transforming from a flat or rigid configuration to a three-dimensional form that closely fits the food item, thereby improving cooking surface contact.
2Ease of operation
If the package uses flexible material with fold lines to conform to food shape, then the cooking surface proximity is improved, but the manufacturing precision and structural integrity become more difficult to control
Solution Approach 1:
The package is divided into multiple sections separated by fold lines, allowing each segment to independently flex and conform to the food item's surface. This segmentation enables the package to adapt to various food shapes while maintaining manufacturing simplicity through standardized fold line patterns.
Solution Approach 2:
The package utilizes a flexible thin-film structure with integrated fold lines that allows it to bend and conform to irregular food shapes. The flexible material maintains structural integrity while enabling the necessary deformation to achieve close contact with the food surface for effective cooking.
3Productivity
If microwave interactive material is added to the package, then browning and crisping performance is enhanced, but the package complexity and material cost increase
Solution Approach 1:
The package employs composite material construction combining microwave-responsive materials with flexible packaging materials. This composite structure enables both the conformability needed for close contact and the microwave interaction required for effective browning and crisping, while integrating multiple functions into a single package system.
Solution Approach 2:
The package serves multiple functions simultaneously: it provides structural containment, enables shape conformation through flexibility, facilitates microwave energy interaction for heating, and creates close cooking surface contact for browning and crisping. This multi-functionality consolidates several cooking requirements into a single integrated package solution.
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
Enhances browning and crisping of food surfaces by increasing the proximity of the susceptor to the food, providing both conduction and convection heating, thereby improving the cooking performance in microwave ovens.
Implementation Method 1
The susceptor typically includes a microwave energy interactive material, such as a metal, that absorbs, reflects, and transmits microwave energy in varying proportions. The susceptor absorbs the microwave energy and thereby becomes hot
Implementation Method 2
The susceptor absorbs the microwave energy and thereby becomes hot, and transmits heat to the food item to promote surface browning and crisping
Implementation Method 3
Upon exposure to microwave energy, the cells expand to form inflated cells that thermally insulate the food item in the package from the environment exterior to the package
Implementation Method 4
the cells expand to form inflated cells that thermally insulate the food item in the package from the environment exterior to the package
Data Source
AI summary
A package for heating a food product. The package has a tray with a central panel for supporting the food product and a flexible flap containing a layer of microwave insulating material for heating the food product. The flexible flap has independently movable sections, wraps around the food product, and forms an open ended cooking sleeve.