Hingeable Valve Mechanism for Flexible Pouch Pressure Relief
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Solution Overview
Problem
Conventional packaging for carbonated drinks faces issues with pressure buildup leading to container rupture, as flexible pouches made from recyclable or biodegradable materials are not strong enough to handle the pressure, and existing solutions involve expensive, non-biodegradable rigid valves that complicate manufacturing and are not recyclable or compostable.
Innovation Solution
A flexible pouch with a hingeable valve mechanism that includes channels and a pocket in the top seal, allowing gas to escape while preventing liquid leakage, achieved through the design of kinking features and pressure release channels that close when the pouch is tipped over.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid pressure relief valve is sealed into the pouch, then the pouch can withstand internal pressure from carbonation, but the manufacturing cost and complexity increase significantly
Solution Approach 1:
The rigid valve is segmented into multiple functional elements: a flexible membrane portion that forms the valve body, a hinge connection that enables rotational movement, and integrated sealing features. This segmentation allows each element to perform its specific function while maintaining overall simplicity and reducing manufacturing complexity.
Solution Approach 2:
The valve transitions from a static rigid structure to a dynamic flexible membrane system that can rotate and deform. The hinge connection enables the membrane to pivot open under pressure while remaining closed during normal conditions, providing automatic pressure relief without complex control mechanisms.
2Reliability
If a rigid pressure relief valve is used, then pressure can be relieved, but the valve is not recyclable, compostable, or biodegradable
Solution Approach 1:
The valve material parameters are changed from rigid, non-biodegradable materials to flexible, biodegradable materials. The membrane is made from materials that can naturally decompose, and the hinge connection uses biodegradable components, enabling the entire valve assembly to be compostable and environmentally friendly while maintaining pressure relief functionality.
3Reliability
If the pouch is tipped over, then liquid may leak through the rigid valve, but the valve fails to release gas pressure
Solution Approach 1:
The valve membrane is designed to dynamically respond to orientation changes. When the pouch is upright, the membrane remains closed to prevent leakage. When tipped over, gravity causes the membrane to pivot open on its hinge, allowing liquid to drain while gas pressure continues to escape through the same opening, solving both problems simultaneously.
Solution Approach 2:
The valve uses the pouch's own orientation and gravity to control its operation. No external controls or additional mechanisms are needed - the valve automatically closes when upright and opens when tipped, using the weight of the liquid and gas to drive its own operation and serve the dual functions of preventing leakage and releasing pressure.
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 solution effectively manages pressure buildup without the need for expensive, non-biodegradable rigid valves, allowing for the use of less expensive, recyclable, or compostable materials while preventing leakage and maintaining the integrity of the package during transport.
Implementation Method 1
The gas, being lighter than liquid or air, will go to the top of the pouch and fill the pocket that was formed in the top seal. As the pocket is filled with gas, it can help prevent the top seal from accidentally kinking
Implementation Method 2
If the pouch is accidentally tipped over, the pocket will fill with the liquid content of the pouch and the weight of the liquid within the pocket will cause it to fall out of the seal on the hinge, which in turn will kink the one or more channels in the seal near the pocket
Data Source
AI summary
A flexible and hingeable valve mechanism is provided to a package or pouch, e.g., a package top seal, creating one or more channels through the top seal of the pouch and then, approximate to the one or more channels, making or forming a pocket within the same seal. As the pocket is filled with gas, it can prevent the top seal from accidentally kinking and allow other gas pressure to flow freely through the one or more channels. If the pouch is tilted or tipped over, the pocket will fill with the liquid content of the pouch and the weight of the liquid within the pocket will cause the pocket to hingeably displace and close off at least a portion of the one or more channels to prevent leaking or spilling.