Sealing Membrane Micro-perforations for Pressure Equalization
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Solution Overview
Problem
Conventional sealed containers for granular or powdered products face issues with pressure differentials during transportation and storage, leading to deformation and seal integrity problems due to air pressure changes with elevation, which existing packaging materials and designs fail to adequately address.
Innovation Solution
A sealed container with a flexible polymer sealing membrane featuring laser-generated micro-perforations, designed to allow air pressure equalization while maintaining seal integrity and preventing contamination, insect infestation, and moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealed container is used to prevent contamination and maintain product freshness, then product protection is improved, but pressure differential damage occurs during elevation changes
Solution Approach 1:
The sealing membrane incorporates laser-generated micro-perforations that create a porous structure. These micro-perforations allow air pressure equalization between the container interior and exterior during elevation changes, preventing container deformation while the membrane itself maintains seal integrity by remaining attached to the sealing lip.
Solution Approach 2:
The solution combines a flexible polymer sealing membrane with micro-perforations to create a composite structure that simultaneously provides sealing functionality and pressure equalization. The membrane material itself maintains structural integrity while the integrated micro-perforations enable pressure relief.
2Strength
If micro-perforations are added to the sealing membrane to equalize pressure, then container deformation is prevented, but contamination risk increases
Solution Approach 1:
The sealing membrane exhibits different properties at different locations: the bulk membrane material provides continuous contamination barrier, while localized micro-perforations provide pressure equalization. The micro-perforations are strategically created only in specific regions of the membrane, allowing pressure relief while maintaining overall seal integrity and contamination protection.
Solution Approach 2:
The laser-generated micro-perforations create a controlled porous structure in the sealing membrane. The porous nature allows air molecules to pass through for pressure equalization, while the small size and distribution of perforations maintain the membrane's ability to block larger contaminants.
3Strength
If a rigid container structure is used to maintain shape, then structural strength is improved, but pressure differential effects worsen
Solution Approach 1:
The sealing membrane with micro-perforations acts as an intermediary element between the rigid container structure and the external environment. It mediates the pressure differential by allowing air passage, thereby protecting the rigid container from deformation while maintaining the benefits of structural strength.
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 differentials, prevents container deformation, maintains seal integrity, and ensures the product's freshness and safety by allowing controlled air exchange without compromising the container's integrity or allowing contaminants in.
Implementation Method 1
the sealing membrane including a plurality of laser generated micro-perforations formed through the sealing membrane, the size of each of the plurality of laser generated micro-perforations being less than 3.937 mils
Data Source
AI summary
A sealed container for packaging of granular or powdered product including a rigid container body defining an interior space and an upper portion, the upper portion having a sealing lip that defines an opening to the interior space, and a flexible, polymer sealing membrane removably attached to the sealing lip to cover the opening, the sealing membrane including a plurality of laser generated micro-perforations formed through the sealing membrane, the size of each of the plurality of laser generated micro-perforations being less than 3.937 mils.