PTFE filters (filters with polytetrafluoroethylene as the filter material) and high-efficiency filters without separators (high-efficiency filters with glass fiber and other main filter materials and without separators) have significant differences in terms of material, performance, application scenarios, etc. The following is a detailed comparison from the core dimensions:
I. Differences in Core Materials and Structures
Comparison items: PTFE filter, non-partitioned high-efficiency filter
The core filter material is polytetrafluoroethylene (PTFE), which is a high-molecular polymer membrane material and features resistance to high and low temperatures as well as chemical inertness. The core filter materials are mostly superfine glass fibers, with a few being polypropylene (PP), etc. The filtration relies on the interception and adsorption functions of the fibers.
Structural design: Filter materials are usually folded to increase the filtration area and can be matched with different support structures (such as metal or plastic frames), with or without separators (depending on the specific model). It adopts a design without separators, and the folded filter material is fixed by hot melt adhesive or silk thread, reducing air resistance and making the structure more compact.
The frame materials are mostly corrosion-resistant materials such as stainless steel and aluminum profiles, which are suitable for harsh environments. Mostly made of aluminium profiles or galvanized steel plates, they are lightweight and have a relatively low cost.
PTFE filters: They have an extremely wide temperature resistance range (typically -200 ℃ to 260℃), and are resistant to corrosion by strong acids, strong alkalis, organic solvents, etc., making them suitable for high-temperature or strong chemical environments.
High-efficiency filter without separators: The temperature resistance of glass fiber is approximately 120℃ to 180℃ (depending on the frame and adhesive), but it is not resistant to strong acids and strong alkalis and has poor chemical stability.
Resistance and dust holding capacity
PTFE filter: The surface of the PTFE membrane is smooth, and its initial resistance is relatively low (10% to 30% lower than that of glass fiber under the same efficiency), but its dust holding capacity is moderate. After long-term use, the resistance increases rapidly (regular replacement is required).
High-efficiency filter without separators: The glass fiber is fluffy, with a relatively high dust holding capacity. The resistance increases slowly over long-term use and has a relatively longer service life (under normal conditions).
Hydrophobicity
PTFE filter: PTFE material is naturally hydrophobic and not prone to moisture absorption, making it suitable for high-humidity or foggy environments (such as food processing, damp laboratories).
High-efficiency filter without separators: Glass fiber is hydrophilic and tends to clump when exposed to moisture, resulting in a decrease in filtration efficiency. It is necessary to avoid high-humidity environments.
Iii. Differences in Application Scenarios
PTFE filter
Suitable for harsh environments or special demand scenarios, such as:
Filtration of highly corrosive gases in the chemical and pharmaceutical industries;
Exhaust air filtration for high-temperature drying workshops and sterilization equipment;
High humidity environments (such as aquatic product processing, cleanroom humidification systems);
Biosafety laboratories with extremely high requirements for microbial interception (hydrophobic properties reduce bacterial growth).
High-efficiency filter without separators
Suitable for conventional clean environments, such as:
Supply/exhaust air for clean rooms in the electronics manufacturing industry;
Air purification in general operating rooms and icus of hospitals;
The clean ventilation system of the food packaging workshop;
Terminal filtration of laboratory fume hoods (non-corrosive, normal temperature environment).
Iv. Cost Differences
PTFE filters: Due to the high cost of PTFE material and complex processing technology, their price is usually 3 to 5 times that of high-efficiency filters without separators, making them suitable for high-value and high-demand scenarios.
High-efficiency filter without separators: The glass fiber material has a low cost, the design without separators simplifies the process, and the price is more affordable, making it suitable for large-scale routine applications.
Resumen
The core difference between the two lies in the environmental adaptability determined by the material properties: PTFE filters, with their core advantages of “resistance to extreme environments and high precision”, are suitable for complex working conditions. The non-woven high-efficiency filter is characterized by “high cost performance and stable durability”, and is suitable for conventional clean requirements. When making a choice, a comprehensive judgment should be made based on factors such as temperature, corrosiveness, humidity and cost budget.
I. Differences in Core Materials and Structures
Comparison items: PTFE filter, non-partitioned high-efficiency filter
The core filter material is polytetrafluoroethylene (PTFE), which is a high-molecular polymer membrane material and features resistance to high and low temperatures as well as chemical inertness. The core filter materials are mostly superfine glass fibers, with a few being polypropylene (PP), etc. The filtration relies on the interception and adsorption functions of the fibers.
Structural design: Filter materials are usually folded to increase the filtration area and can be matched with different support structures (such as metal or plastic frames), with or without separators (depending on the specific model). It adopts a design without separators, and the folded filter material is fixed by hot melt adhesive or silk thread, reducing air resistance and making the structure more compact.
The frame materials are mostly corrosion-resistant materials such as stainless steel and aluminum profiles, which are suitable for harsh environments. Mostly made of aluminium profiles or galvanized steel plates, they are lightweight and have a relatively low cost.
PTFE filters: They have an extremely wide temperature resistance range (typically -200 ℃ to 260℃), and are resistant to corrosion by strong acids, strong alkalis, organic solvents, etc., making them suitable for high-temperature or strong chemical environments.
High-efficiency filter without separators: The temperature resistance of glass fiber is approximately 120℃ to 180℃ (depending on the frame and adhesive), but it is not resistant to strong acids and strong alkalis and has poor chemical stability.
Resistance and dust holding capacity
PTFE filter: The surface of the PTFE membrane is smooth, and its initial resistance is relatively low (10% to 30% lower than that of glass fiber under the same efficiency), but its dust holding capacity is moderate. After long-term use, the resistance increases rapidly (regular replacement is required).
High-efficiency filter without separators: The glass fiber is fluffy, with a relatively high dust holding capacity. The resistance increases slowly over long-term use and has a relatively longer service life (under normal conditions).
Hydrophobicity
PTFE filter: PTFE material is naturally hydrophobic and not prone to moisture absorption, making it suitable for high-humidity or foggy environments (such as food processing, damp laboratories).
High-efficiency filter without separators: Glass fiber is hydrophilic and tends to clump when exposed to moisture, resulting in a decrease in filtration efficiency. It is necessary to avoid high-humidity environments.
Iii. Differences in Application Scenarios
PTFE filter
Suitable for harsh environments or special demand scenarios, such as:
Filtration of highly corrosive gases in the chemical and pharmaceutical industries;
Exhaust air filtration for high-temperature drying workshops and sterilization equipment;
High humidity environments (such as aquatic product processing, cleanroom humidification systems);
Biosafety laboratories with extremely high requirements for microbial interception (hydrophobic properties reduce bacterial growth).
High-efficiency filter without separators
Suitable for conventional clean environments, such as:
Supply/exhaust air for clean rooms in the electronics manufacturing industry;
Air purification in general operating rooms and icus of hospitals;
The clean ventilation system of the food packaging workshop;
Terminal filtration of laboratory fume hoods (non-corrosive, normal temperature environment).
Iv. Cost Differences
PTFE filters: Due to the high cost of PTFE material and complex processing technology, their price is usually 3 to 5 times that of high-efficiency filters without separators, making them suitable for high-value and high-demand scenarios.
High-efficiency filter without separators: The glass fiber material has a low cost, the design without separators simplifies the process, and the price is more affordable, making it suitable for large-scale routine applications.
Resumen
The core difference between the two lies in the environmental adaptability determined by the material properties: PTFE filters, with their core advantages of “resistance to extreme environments and high precision”, are suitable for complex working conditions. The non-woven high-efficiency filter is characterized by “high cost performance and stable durability”, and is suitable for conventional clean requirements. When making a choice, a comprehensive judgment should be made based on factors such as temperature, corrosiveness, humidity and cost budget.
