Microwave Bag with Heat-Resistant Paper Base
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Solution Overview
Problem
Existing bag-like containers for microwave cooking, primarily made of resin films, risk damage from heat generated by the heating element during cooking.
Innovation Solution
A bag-like container with a bottom sheet comprising a first paper base layer and a heating element layer that absorbs electromagnetic waves, and a top sheet that transmits electromagnetic waves and is separable from the bottom sheet, preventing damage from heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a resin film is used as the container material, then the container can be manufactured easily and is cost-effective, but the resin film is damaged by heat generated by the heating element during microwave cooking
Solution Approach 1:
The container uses a composite structure combining a resin film layer and a heat-resistant paper layer. The resin film provides ease of manufacture and sealing properties, while the heat-resistant paper layer prevents damage from heating element heat, thus resolving the contradiction between ease of manufacture and heat resistance.
2Productivity
If a heating element layer is provided on the container to brown food, then cooking effectiveness is improved, but the heating element generates heat that damages the resin film container
Solution Approach 1:
The container combines a resin film layer for sealing and manufacturing ease with a heat-resistant paper layer that can withstand heating element temperatures. This composite structure allows the heating element to function effectively for browning food while preventing heat damage to the container material.
Solution Approach 2:
The heat-resistant paper layer acts as an intermediary between the heating element and the resin film. It protects the resin film from direct heat exposure while allowing the heating element to maintain contact with the container for effective food browning.
3Strength
If the top sheet is bonded permanently to the bottom sheet, then structural integrity is maintained, but the container cannot be opened to access the cooked food
Solution Approach 1:
The bond between the top sheet and bottom sheet is designed to be dynamic rather than permanent. The sheets are bonded in a manner that allows separation after cooking, providing both structural integrity during cooking and ease of opening after cooking, thus resolving the contradiction between strength and openability.
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 prevents damage from heat and achieves a browned surface and crispy texture for the food, while maintaining structural integrity during microwave cooking.
Implementation Method 1
a heating element layer configured to generate heat by absorbing electromagnetic waves
Implementation Method 2
the top sheet transmits the electromagnetic waves
Data Source
AI summary
A bag-like container includes a bottom sheet including a first paper base layer and a heating element layer configured to generate heat by absorbing electromagnetic waves; and a top sheet bonded to the bottom sheet in such a manner as to be separable from the bottom sheet with a content to be cooked being contained, wherein the top sheet transmits the electromagnetic waves.