Air Filter Paper: Air filter paper is employed to prevent particles and pollutants from entering the engine through the intake air. Unlike oil filters, air filters require high permeability to ensure that the engine receives an adequate supply of fresh air while effectively capturing dust, pollen, insects, and other minute particles.
Oil Filter Paper: The role of oil filter paper is to remove impurities from the engine oil to maintain its purity. Oil filter paper needs to handle high-viscosity liquid, making it generally more dense.
Material: Filter paper is typically made from cellulose, synthetic fibers, or hybrid materials. Different materials exhibit varying filtration efficiency and durability.
Fiber Density: The fiber density of filter paper affects its particle-capturing ability. Denser fibers can better capture tiny particles, but they may reduce permeability.
Permeability: Permeability is a crucial characteristic of filter paper, especially for air filters. High-permeability filter paper allows more air to pass through, improving engine performance while effectively preventing particle ingress. Permeability is often determined by the pore size and fiber arrangement in the filter paper.
Folding Methods: In automotive filters, filter paper is typically folded to increase the filtration surface area, enhancing efficiency. Different folding methods can affect the stability and structure of the filter paper. Common folding methods include pleating, corrugation, and combination styles.
Filtration Efficiency: Different filter papers also exhibit varying filtration efficiencies. High-efficiency filter paper can capture tiny particles effectively but may require more frequent replacement due to potential clogging.
Permeability: High permeability is crucial, especially for air filters. Filter paper with high permeability allows more fresh air into the engine, enhancing combustion efficiency and driving performance. Inadequate permeability can lead to power loss as the engine struggles to obtain sufficient oxygen. Improved permeability is achieved by controlling pore size, fiber spacing, and fiber types.
Folding Methods: The folding of filter paper aims to increase the filter's surface area, enhancing filtration efficiency. More surface area means more particles can be captured, extending the filter paper's lifespan. Different folding methods can impact the stability and structure of the filter paper. Common folding methods include pleating, wave patterns, and hybrid styles.