Pleated Air Filter Bridging Filaments Structural Integrity
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Solution Overview
Problem
Pleated air filters face challenges in maintaining structural integrity and airflow efficiency due to the lack of effective bridging and continuous-contact filaments, which affect their rigidity and compressibility, particularly in HVAC systems.
Innovation Solution
The use of linear bridging filaments on the upstream face and continuous-contact filaments on the downstream face of pleated air filter media, extrusion-bonded to the pleat tips and media surfaces respectively, enhances the structural stability and airflow by creating a truss-like structure that resists compression while allowing lateral compressibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If pleated air filter media uses traditional filtration structure without bridging and continuous-contact filaments, then manufacturing is simpler, but structural integrity and rigidity are insufficient
Solution Approach 1:
The filter media is divided into distinct functional elements: pleats for filtration surface area, bridging filaments for cross-pleat connection, and continuous-contact filaments for longitudinal support. This segmentation allows each element to perform its specific function optimally while collectively providing the required structural integrity.
Solution Approach 2:
The filter media combines multiple filament types (bridging filaments and continuous-contact filaments) with the base filtration material to create a composite structure. This composite approach provides both filtration capability and enhanced mechanical strength, resolving the contradiction between simplicity and structural integrity.
2Force
If pleated air filter media lacks effective bridging filaments, then manufacturing process is simpler, but resistance to compression and deformation is reduced
Solution Approach 1:
Bridging filaments are incorporated into the filter media during the manufacturing process, establishing the compression-resistance structure before the filter is put into service. This preliminary structural reinforcement ensures the filter can withstand compression forces during operation without requiring complex post-manufacturing reinforcement.
3Stability of the object's composition
If pleated air filter media uses rigid structure to improve rigidity, then structural stability improves, but airflow efficiency and compressibility for storage are compromised
Solution Approach 1:
Different regions of the filter media have different structural properties: the pleats maintain openness for airflow, while the bridging and continuous-contact filaments provide localized reinforcement for structural stability. This local differentiation allows the filter to be both stable and airflow-efficient simultaneously.
Solution Approach 2:
The filter media uses thin filament structures (bridging and continuous-contact filaments) that provide structural support without creating significant flow resistance. These thin-film-like filaments maintain the pleated geometry and provide stability while preserving airflow efficiency.
4Volume of moving object
If pleated air filter media is made highly compressible for storage, then ease of storage improves, but structural integrity during operation is compromised
Solution Approach 1:
The filter media exhibits dynamic structural properties: during storage, the pleats can be compressed together to reduce volume, but the bridging and continuous-contact filaments maintain their structural integrity during operation, preventing collapse under compression forces. This dynamic behavior allows the filter to adapt between storage and operational states.
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
This configuration significantly improves the rigidity and resistance to deformation of the pleated media, maintaining airflow efficiency and allowing for controlled lateral compression, enabling easier storage and installation without compromising filtration performance.
Implementation Method 1
a first plurality of molten streams of extrudable organic polymeric material are extruded and partially solidified into a first plurality of parallel, spaced-apart, elongate, partially-solidified filaments; the first partially-solidified filaments are then deposited onto a downstream face of a moving, flat fibrous air-filtration web
Implementation Method 2
a first plurality of molten streams of extrudable organic polymeric material are extruded and partially solidified into a first plurality of parallel, spaced-apart, elongate, partially-solidified filaments
Data Source
AI summary
A pleated air filter media is provided. The pleated air filter media comprises a plurality of upstream linear bridging filaments that are extrusion-bonded to at least some of a plurality of upstream pleat tips of a fibrous web, and a plurality of downstream continuous-contact filaments that are extrusion-bonded to a downstream face of the fibrous web. Methods of making and using the same are also provided.