Multi-Component Segmented Pie Filter Medium for HVAC Air Filtration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional filter media used in HVAC and vehicle air filtration systems face challenges in achieving optimal filtration efficiency and durability, particularly in handling increasing air pollution and maintaining mechanical stability during processing and use.
Innovation Solution
A filter medium composed of spun-bonded nonwovens with multi-component segmented pie fibers, featuring interconnected plastic components and a segmented pie configuration, which enhances filtration properties and mechanical resistance without splitting during processing, allowing for improved air permeability and retention capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional filter media are used to filter air in HVAC and vehicle interior systems, then filtration is provided, but filtration efficiency and mechanical stability are insufficient to handle increasing air pollution and maintain performance during processing and use
Solution Approach 1:
The patent employs composite materials by combining multi-component fibers with different plastic properties in a spun-bonded nonwoven structure. The composite nature of the fibers allows optimization of both filtration efficiency and mechanical stability, as each component contributes different characteristics to the overall filter medium performance.
Solution Approach 2:
The patent utilizes parameter changes by selecting plastic components with specific melting point differences and adjusting the ratio of components in the multi-component fibers. This allows control over the thermal behavior and mechanical properties of the filter medium, enabling it to maintain stability during processing while achieving high filtration efficiency.
2Ease of manufacture
If filter media are processed through laminating, embossing, pleating, and other manufacturing steps, then filter elements are formed, but the filter media must maintain suitability through all processing steps which challenges mechanical stability
Solution Approach 1:
The patent applies parameter changes by utilizing the difference in melting points between the plastic components of the multi-component fibers. During processing, temperature control is adjusted to ensure the filter medium remains stable enough to withstand manufacturing steps like laminating and pleating, while the differential melting allows for proper bonding and structural integrity.
3Productivity
If pleated or pleated filter media are used to maximize filter area in a given size, then flow resistance is reduced and filtration efficiency is improved, but the complexity of processing and maintaining structural integrity increases
Solution Approach 1:
The patent uses composite materials in the form of multi-component fibers that provide both the structural integrity needed for pleating and the flexibility required for efficient airflow. The composite structure allows the filter medium to be pleated into complex three-dimensional configurations while maintaining mechanical stability and filtration performance.
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 provides a filter medium with enhanced filtration efficiency, increased mechanical stability, and extended service life by maintaining the integrity of multi-component fibers, thereby improving air quality and reducing material usage while maintaining high filtration performance.
Implementation Method 1
a filter medium for filtering a fluid, in particular for filtering air, with a spun-bonded nonwoven
Data Source
AI summary
A filter medium (10) for filtering a fluid, in particular for use in an interior air filter (32), comprises a spun-bonded nonwoven formed at least in part of multi-component segmented pie fibers (1) having at least a first plastic component (2) and a second plastic component (3). The multi-component fibers (1) are largely non-split, and in order to manufacture same, segmented pie filaments are spun in a spun-bonding process (S4) to form a spun-bonded nonwoven (10). The segmented pie filaments then form the multi-component fibers (4), the first plastic component (2) and/or the second plastic component (3) being made in particular of a polypropylene.