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The air filter paper for F7-class vehicles is a medium-high efficiency filtering material. This filter paper is used in heavy truck filters and is capable of adapting to complex road conditions.It can filter out particles with a size ranging from 0.4 to 10 micrometers with a filtration efficiency of 80% to 90%. It can effectively intercept exhaust particulates, road dust, pollen, industrial dust and other fine impurities. This can significantly reduce the amount of impurities entering the engine cylinder, prevent the wear of components such as pistons, cylinder walls and valves, and extend the service life of the engine.
F7 filter paper has a greater dust-holding capacity, with denser fiber arrangement and higher loft. It can accommodate more dust and impurities without clogging quickly. This can extend the replacement cycle of the air filter element, reduce maintenance frequency and vehicle usage costs.
F7 filter paper has a greater dust-holding capacity, with denser fiber arrangement and higher loft. It can accommodate more dust and impurities without clogging quickly. This can extend the replacement cycle of the air filter element, reduce maintenance frequency and vehicle usage costs.In areas with heavy sand and dust, on congested urban roads (where exhaust particulates are dense), or during pollen season, the F7 grade filter paper offers far superior protection compared to ordinary filter paper. It can better adapt to complex driving environments and provide stable clean air intake for the engine.



Technical Data Sheet
| Application | Air Filter | |
| Resin System | Acrylic Resin | |
| Model No. | OJWK-11516 | |
| Test Item | Product Standards | Test Standard |
| Grammage | 115±5 g/m2 | GB/T451.2-2002 |
| Air Permeability | 160 ±30 L/m2•s (△=200pa) | QB/T-2006 |
| Corrugation Depth | 0.45±0.05 mm | GB/T451.3-2002 |
| Thickness | 0.68±0.03 mm | GB/T451.3-2002 |
| Burst Strength | 350±50 kpa | GB/T454-2002 |
| Stiffness | 6.5±0.5 mn•m | GB/T2679.3-1996 |
| Max Pore Size | 40±5 μm | QC/T794-2007 |
| Mean Pore Size | 35±5 μm | |
| Note: color, size and each specification parameter can be changed as per customer’s requirement. | ||
Hebei Oujin Nonwoven Fabric Technology Co., Ltd. was established in 2004. It is an environmentally friendly enterprise specializing in
the production of filter paper. Currently, it has 120 employees, covers an area of 120 acres, has an annual output value of 300 million yuan,
and possesses 4 advanced filter paper production lines and control systems. The annual production capacity reaches 30,000 tons, meeting
the production needs of customer orders. The production strictly follows the ISO9001 and IATF16949 quality management systems,
meeting the production requirements of customers.








FAQ
Why choose our company?
We are a professional filter paper supplier with over 20 years of experience. You can rest assured that all the products purchased from us are made by genuine professional manufacturers. Here, you can get high-quality goods that meet international standards at reasonable prices. We guarantee that all qualified and high-quality products can meet the IATF16949 standards.
Can your factory provide samples?
We can offer free samples to our customers.
What is the production cycle of your factory?
Complete the production within 15 working days
Can I print my logo on the packaging?
Yes.We offer customized packaging services