Microwave Pouch Folded-Back Section for Automatic Opening
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Solution Overview
Problem
Conventional microwave-cooking pouches face issues with burst bags due to increased pressure during heating, leading to food spillage and safety hazards, and existing solutions either require extra time and labor or reduce the steaming effect, while flat-type pouches with automatic opening mechanisms struggle to maintain the opening position without auxiliary devices.
Innovation Solution
A flat-type plastic pouch design featuring a folded-back section across its width with heat-sealed edges and an automatic opening mechanism that stabilizes the opening at a high position during microwave heating, eliminating the need for auxiliary devices and ensuring efficient manufacturing and packing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional packaging bag is hermetically sealed and heated by microwave oven, then the bag maintains its sealed state, but the pressure increases causing the bag to burst and scatter contents
Solution Approach 1:
The pouch is divided into a body portion and a folded-back section that can independently deform. The folded-back section acts as a pressure relief mechanism that segments the structural response to internal pressure, allowing controlled opening without complete bag failure.
Solution Approach 2:
The folded-back section is pre-formed during manufacturing to create a structural configuration that will automatically respond to pressure increases. This preliminary structural preparation enables the pouch to self-regulate pressure during microwave heating without requiring external intervention.
2Object-affected harmful factors
If the packaging bag is partly opened or a hole is made before heating, then vapor can be discharged to prevent bursting, but extra time and labor are required and the steaming effect is reduced
Solution Approach 1:
The pouch structure automatically performs the pressure relief function through its folded-back section design. When internal pressure increases during microwave heating, the folded-back section naturally opens to discharge vapor, eliminating the need for manual intervention and preserving the steaming effect within the pouch.
3Productivity
If a flat-type pouch with automatic opening mechanism is used, then productivity and cost are improved, but the opening portion cannot be held stably at a high position causing content spout or leakage
Solution Approach 1:
The folded-back section extends in the width direction across the entire pouch, creating a three-dimensional structure that provides structural support. This dimensional extension allows the opening portion to be held stably at a high position during cooking, preventing content spillage while maintaining the simplicity of flat-type pouch manufacturing.
4Stability of the object's composition
If an auxiliary device such as item packaging box is used to hold the opening portion, then the opening can be stabilized at a high position, but cumbersome operation and increased cost result
Solution Approach 1:
The stabilizing function is extracted from external auxiliary devices and integrated directly into the pouch structure itself. The folded-back section forms an inherent structural support system that holds the opening portion at a high position without requiring separate packaging boxes or additional components.
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 pouch effectively prevents content spillage and leakage by maintaining the automatic opening at a high position, enhancing cooking efficiency and safety without additional components or labor, while maintaining cost-effectiveness and productivity.
Implementation Method 1
heat-sealing peripheral edge portions of plastic films constituting front and back surfaces
Data Source
AI summary
At least one of an obverse surface film and reverse surface film, which are used to together constitute a plastic pouch, is folded back across the entire width of the plastic pouch, and peripheral edge portions of the pouch are heat-sealed, to thereby form, on at least one position, a folded-back section communicating with the body of the pouch.