Flexible Laminate One-Way Valve With Tunable Degassing Pressure
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Solution Overview
Problem
Conventional one-way valves in flexible packages are either structurally unsupported due to the lack of adhesives, leading to unwanted oxygen ingress, and cannot be adjusted for varying opening pressures, which compromises the integrity of the package by allowing gas buildup and potential bursting.
Innovation Solution
A flexible laminate structure with an integrated one-way valve featuring adhesive zones that create specific de-gassing flow channels, allowing customizable opening pressures by varying the adhesive amount and disposition, ensuring the valve remains closed and preventing oxygen ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If adhesive-free valve area is used, then the valve can open easily for gas release, but the valve becomes structurally unsupported allowing unwanted oxygen ingress
Solution Approach 1:
The patent applies adhesive selectively in specific locations within the valve area rather than uniformly across the entire valve region. This creates zones of different adhesive concentration that provide structural support in certain areas while maintaining ease of opening in others, resolving the contradiction between valve opening ease and package integrity.
2Reliability
If adhesive is applied in the valve area, then the valve structure is reinforced preventing oxygen ingress, but the valve opening pressure cannot be customized
Solution Approach 1:
The patent enables customization of valve opening pressure by varying parameters such as adhesive amount, adhesive disposition, flow channel size, and adhesive strength. These parameter changes allow the valve to be tuned for different opening pressures while maintaining structural reinforcement, thus achieving both package integrity and adaptability.
3Ease of manufacture
If uniform adhesive application is used, then manufacturing is simple, but the opening pressure cannot be adjusted for different products
Solution Approach 1:
The patent transitions from a static uniform adhesive application to a dynamic system where adhesive distribution can be varied. By using patterned adhesive application with controllable parameters (amount, disposition, flow channel dimensions), the system becomes adaptable to different opening pressure requirements while remaining manufacturable through controlled application processes.
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 allows gas escape while maintaining package integrity, reducing oxygen ingress and customizable opening pressures, thus preventing package distortion and bursting.
Implementation Method 1
The valve area comprises a viscous medium, such as oil, that is pattern-applied to at least one of the first or second film layers and is disposed between the first and second film layers
Implementation Method 2
An adhesive layer is disposed between the first and second film layer, wherein the first film layer, the second film layer, and the adhesive layer define a valve area in which the first film layer and the second film layer are not permanently adhered to each other
Data Source
AI summary
The invention is directed to a one-way valve for a flexible package which comprises a first film layer having at least one first cut line and a second film layer having at least one second cut line, wherein the lines are offset from one another. An adhesive layer is disposed between the film layers. The film layers and the adhesive layer define a valve area wherein the first film layer and the second film layer are not permanently adhered to each other. The second cut line fluidly connects the interior of the flexible package to the valve area and the first cut line fluidly connects the valve area to the ambient atmosphere surrounding the flexible package. The adhesive pattern within the valve area creates a gas flow channel from the second cut line toward the first cut line.