Horizontal Venting Gasket for Pressure-Sensitive Containers
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Solution Overview
Problem
Existing venting arrangements for containers with temperature and pressure-sensitive substances have limited venting capacity and mechanical properties, leading to potential container collapse, swelling, or leakage due to inadequate pressure equalization.
Innovation Solution
A gasket comprising a hydrophobic, liquid-impermeable outer layer and a porous, incompressible inner layer, such as PTFE and UHMW polyethylene, respectively, allowing horizontal gas venting to improve flow rates and resist compressive loads, while maintaining a liquid-tight seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional PTFE or ePTFE liners are used for venting, then liquid sealing is achieved, but venting capacity is limited due to constrained aperture size and channel dimensions
Solution Approach 1:
The patent transitions from vertical venting channels to horizontal venting apertures, changing the orientation dimension. This allows the venting surface to extend laterally across the gasket rather than being constrained to a vertical column, effectively increasing the venting area without increasing gasket thickness
Solution Approach 2:
The patent employs a microporous PTFE membrane material that provides distributed porosity throughout the gasket structure. This porous network creates numerous small venting pathways across the entire gasket surface, dramatically increasing total venting capacity while maintaining structural integrity and liquid sealing
2Reliability
If conventional PTFE is used for the gasketing element, then sealing is provided, but mechanical properties deteriorate under compressive loads causing the material to spread out
Solution Approach 1:
The patent creates a composite structure by combining PTFE membrane material with a reinforcing mesh or fabric substrate. This composite construction provides the PTFE's chemical resistance and sealing properties while the mesh substrate supplies tensile strength and dimensional stability, preventing material spread under compression
Solution Approach 2:
The patent utilizes a thin PTFE membrane that is stretched and tensioned within the gasket structure, creating a pre-stressed state that enhances compressive resistance. The membrane's flexibility allows it to conform to sealing surfaces while its tensile strength prevents excessive deformation under load
3Productivity
If vertically oriented venting channels are used, then pressure equalization is achieved, but gas flow rate is restricted by the narrow channel dimensions
Solution Approach 1:
The patent reorients venting from a vertical column configuration to a horizontal planar configuration. This dimensional change allows gas to flow laterally across a much larger area of the gasket, dramatically increasing flow rate while reducing the effective flow path length through the material
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 gasket enhances venting capacity, resists compressive loads, and maintains a secure seal, effectively preventing container issues like collapse or leakage by allowing increased gas flow and accommodating various geometries and applications.
Implementation Method 1
The at least one first outer layer may be hydrophobic and may have one or more apertures therethrough
Implementation Method 2
At least one of the layers is a porous, substantially incompressible layer, such as UHMW polyethylene, for venting gas substantially horizontally therethrough
Data Source
AI summary
There is provided a gasket element having at least one first inner layer and at least one first outer layer. Each of the at least two layers have differing material properties. The gasket element is well suited to cooperate with an ingress/egress opening of a container that in turn is well suited to retain an active pressure and/or temperature sensitive substance. The gasket element may be operatively connected to a cap element that is suitable to selectively close the at least one ingress/egress opening of the container. The cap element may be a stand alone sealing cap or may be operatively associated with a spray nozzle or the like.