In the field of special manufacturing, the core value of fiberglass bag air filters lies in their ability to meet high cleanliness requirements, withstand specific environments (such as local high temperatures and low corrosion), and ensure product accuracy and production compliance through “medium-efficiency filtration” or “pre-protection of high-efficiency filters”. They are particularly suitable for manufacturing scenarios that are sensitive to dust and impurities and require stable filtration performance. The specific application scenarios can be further classified into the following four categories, covering key fields such as electronic semiconductors, pharmaceuticals and food, aerospace, and optical instruments:
I. Electronics and Semiconductor Manufacturing: Ensuring precise manufacturing processes and avoiding dust-induced waste
The manufacturing of electronic semiconductors has extremely high requirements for air cleanliness (control of dust at the micrometer or even nanometer level). Fiberglass bag filters, with their low dust generation and medium to high efficiency filtration accuracy, have become the core filtration unit, directly affecting the yield of chips and components.
Core chip manufacturing processes (photolithography/etching/deposition
Scene requirement: During the photolithography process, if dust particles larger than 0.5μm adhere to the surface of the chip wafer, it will directly cause the photolithography pattern to shift and short circuit. During etching/deposition (such as thin film deposition), impurities can disrupt the uniformity of the film and affect the performance of the chip.
Function of the filter As a pre-filter unit for high-efficiency filters (HEPA/ULPA), it intercepts dust and fiber impurities of 0.3-5μm in the air (such as fibers brought in by air conditioning systems and sand and dust in outdoor fresh air), reducing the load on HEPA/ULPA (HEPA is costly and has a short replacement cycle). Pre-filtering can extend its service life by 30% to 50%. Meanwhile, the glass fiber filter material itself has no fiber shedding (low dust generation), avoiding the contamination of wafers by filter material impurities, and is suitable for the clean requirements of advanced processes of 14nm and below (such as the clean workshops of TSMC and SMIC).
Electronic component packaging (LED/IC/ sensor)
When packaging leds, if solder dust or resin particles adhere to the chip pins or the phosphor layer, it will cause brightness attenuation and dead lights. In IC packaging (such as BGA ball grid arrays), tiny impurities can cause false soldering of pins and package bubbles, affecting the reliability of components.
Filter function: Installed in the circulating ventilation system of the packaging workshop, it efficiently captures solder dust (1-3μm) and resin debris. At the same time, it can withstand local high temperatures during the packaging process (such as 180-220℃ during soldering), preventing filter bag deformation and ensuring stable filtration efficiency (filtration efficiency can reach F8-F9 grade, interception efficiency ≥95%@0.5μm).
Ii. Pharmaceutical and Food Manufacturing: Comply with compliance standards, control microorganisms and impurities
Pharmaceutical and food manufacturing must comply with strict industry standards (such as GMP and national food safety standards). Fiberglass bag filters ensure a “sterile and impurity-free” production environment by efficiently intercepting dust and being resistant to disinfection and local high temperatures.
Pharmaceutical clean area (Production of sterile drugs/antibiotics
The production of antibiotics (such as penicillin) and vaccines must be carried out in a clean area of Class D or above. Dust and microbial carriers in the air (such as bacteria attached to dust) can cause drug contamination and batch scrapping. At the same time, some processes (such as drying and sterilization) will generate local high temperatures (120-180℃).
Function of the filter As the core of medium-efficiency filtration in the ventilation system of clean areas, it intercepts dust and microbial carriers larger than 5μm in fresh air or recirculated air, providing “pre-protection” for subsequent high-efficiency filtration (such as HEPA in biosafety cabinets and aseptic filling lines) It complies with the requirements for “airborne particles” stipulated in the “Good Manufacturing Practice (GMP) for Pharmaceutical Products” (for example, the number of particles ≥5μm in the D-class clean area is ≤ 290,000 per cubic meter). Some sterilization-resistant models (capable of withstanding formaldehyde and hydrogen peroxide fumigation) can be adapted to the regular disinfection needs of sterile areas, preventing the growth of microorganisms on filter materials.
High-temperature food processing (baking/spray drying)
When baking cookies and spray drying milk powder, food dust (such as flour particles and milk powder particles) at high temperatures (120-200℃) is produced. If directly discharged, it will cause air pollution. If it enters the air conditioning system, it will lead to cross-contamination in the workshop (such as flour dust mixing into milk powder).
The function of the filter: Installed in the exhaust duct of the workshop, it efficiently captures food dust (filtration efficiency F7 grade, ≥80%@0.5μm) by taking advantage of the temperature resistance of the fiberglass filter material (above 200℃), preventing dust emissions from exceeding the standard (in compliance with the “Integrated Emission Standard of Air Pollutants” GB 16297). At the same time, the filter material has no odor, no migrating substances, will not contaminate food, and meets food safety requirements.
Iii. Aerospace and High-End Equipment Manufacturing: Suitable for precision processing and resistant to special working conditions
Components in aerospace and high-end equipment manufacturing (such as turbine blades and precision bearings) have strict requirements for “dimensional accuracy and surface finish”, and may be accompanied by local high temperatures and oil mist environments. Fiberglass bag filters can specifically address these filtration needs
Processing of aero engine/gas turbine components
When processing turbine blades (made of high-temperature resistant alloy materials), metal cutting will produce alloy chips (such as titanium alloys and nickel-based alloys) of 1-10μm. If they adhere to the blade surface, it will affect the subsequent grinding accuracy (the blade tolerance needs to be controlled within 0.01mm). At the same time, a small amount of oil mist (atomization of cutting fluid) will be produced during the cutting process, which is prone to clogging ordinary filter materials.
The function of the filter: In the clean ventilation system of the processing workshop, it intercepts metal debris to prevent it from entering the machine tool or adhering to the surface of components. The oil resistance and anti-clogging property of fiberglass filter material (with a dust holding capacity 20%-30% higher than that of ordinary polyester filter material) can adapt to oil mist environments, reduce the frequency of filter replacement, and ensure continuous production.
High-end precision instruments (sensors/precision motors)
During the assembly process of MEMS sensors (such as mobile phone gyroscopes) and precision motors (such as drone motors), dust particles of 0.1 to 1μm can cause component jamming and signal deviation. Some motor winding processes can generate local high temperatures (such as 150℃ when drying insulating varnish).
The function of the filter: As a medium-efficiency filter unit in the assembly workshop, it intercepts fine dust, and at the same time, it can withstand local high temperatures to prevent the filter material from deforming or releasing harmful substances, ensuring the accuracy of the instrument (for example, the measurement error of the MEMS sensor needs to be ≤0.001mm).
Iv. Optics and New Energy Manufacturing: Controlling Tiny Impurities to Ensure Product Performance
Optical devices and new energy products are sensitive to “surface cleanliness and material purity”. Fiberglass bag filters, through high-precision filtration and low-pollution characteristics, prevent impurities from affecting the core functions of the products
Optical instrument manufacturing (lenses/laser devices)
Scene requirements: During the coating/polishing process of camera lenses and lidar lenses, dust particles larger than 0.3μm will adhere to the surface of the lenses, resulting in a decrease in light transmittance (for example, the light transmittance of the lens needs to be ≥99.5%) and laser scattering. The high temperature of the evaporation source during coating (above 200℃ in some areas) also has requirements for the heat resistance of the filter material.
The function of the filter: Installed in the ventilation system of the optical clean workshop, it efficiently intercepts dust particles ranging from 0.3 to 1μm (filtration efficiency H10 grade, ≥95%@0.3μm). Meanwhile, the glass fiber filter material contains no volatile substances and no fiber shedding, preventing contamination of the lens surface. The local high-temperature resistance property can adapt to the environmental requirements of the coating process.
New energy materials manufacturing (lithium batteries/photovoltaic modules)
Scene requirement: When lithium battery cathode materials (such as ternary materials) are mixed, 1-5μm of powder will be produced. If mixed into the battery cells, it will cause internal short circuits. When welding photovoltaic modules (solar cells), dust from the welding tape and glass debris can affect the conductivity of the solar cells and reduce the conversion efficiency of the photovoltaic panels (which needs to be controlled above 23%).
The function of the filter: In the ventilation systems of the material mixing workshop and component assembly workshop, it intercepts the powder of cathode materials and the dust of soldering strips, preventing them from spreading to other processes (such as battery cell packaging). The chemical stability of fiberglass filter material (resistant to lithium salt corrosion in the electrolyte) can be adapted to the slightly corrosive environment in lithium battery workshops, thus extending the service life of the filter.
Summary: The core logic of applications in special manufacturing fields
The application of fiberglass bag filters in special manufacturing fields essentially lies in “meeting the special demands of scenarios with ‘environmental adaptability’ and ensuring product quality with ‘high-precision filtration'”. Its irreplaceable advantages are reflected in three aspects:
Performance compatibility: Medium and high efficiency filtration accuracy (F7-H10 grade) can cover 0.3-5μm dust, meeting the clean requirements of precision manufacturing.
Environmental resistance: Resistant to high temperatures of 200-300℃, mild corrosion, and oil mist, solving the problems of “easy deformation and easy clogging” of common filter materials (such as polyester) under special working conditions.
Compliance: Low dust generation, no migrating substances, in line with industry standards in fields such as electronics, pharmaceuticals, and food (such as GMP, semiconductor cleanliness standards), preventing the filter material itself from becoming a source of pollution.
When making a selection, it is necessary to focus on matching the cleanliness level of the scene (such as F8 or H10), the temperature range (such as whether it exceeds 200℃), and whether there is corrosion/oil mist, to ensure that the filter is precisely compatible with the manufacturing process.
I. Electronics and Semiconductor Manufacturing: Ensuring precise manufacturing processes and avoiding dust-induced waste
The manufacturing of electronic semiconductors has extremely high requirements for air cleanliness (control of dust at the micrometer or even nanometer level). Fiberglass bag filters, with their low dust generation and medium to high efficiency filtration accuracy, have become the core filtration unit, directly affecting the yield of chips and components.
Core chip manufacturing processes (photolithography/etching/deposition
Scene requirement: During the photolithography process, if dust particles larger than 0.5μm adhere to the surface of the chip wafer, it will directly cause the photolithography pattern to shift and short circuit. During etching/deposition (such as thin film deposition), impurities can disrupt the uniformity of the film and affect the performance of the chip.
Function of the filter As a pre-filter unit for high-efficiency filters (HEPA/ULPA), it intercepts dust and fiber impurities of 0.3-5μm in the air (such as fibers brought in by air conditioning systems and sand and dust in outdoor fresh air), reducing the load on HEPA/ULPA (HEPA is costly and has a short replacement cycle). Pre-filtering can extend its service life by 30% to 50%. Meanwhile, the glass fiber filter material itself has no fiber shedding (low dust generation), avoiding the contamination of wafers by filter material impurities, and is suitable for the clean requirements of advanced processes of 14nm and below (such as the clean workshops of TSMC and SMIC).
Electronic component packaging (LED/IC/ sensor)
When packaging leds, if solder dust or resin particles adhere to the chip pins or the phosphor layer, it will cause brightness attenuation and dead lights. In IC packaging (such as BGA ball grid arrays), tiny impurities can cause false soldering of pins and package bubbles, affecting the reliability of components.
Filter function: Installed in the circulating ventilation system of the packaging workshop, it efficiently captures solder dust (1-3μm) and resin debris. At the same time, it can withstand local high temperatures during the packaging process (such as 180-220℃ during soldering), preventing filter bag deformation and ensuring stable filtration efficiency (filtration efficiency can reach F8-F9 grade, interception efficiency ≥95%@0.5μm).
Ii. Pharmaceutical and Food Manufacturing: Comply with compliance standards, control microorganisms and impurities
Pharmaceutical and food manufacturing must comply with strict industry standards (such as GMP and national food safety standards). Fiberglass bag filters ensure a “sterile and impurity-free” production environment by efficiently intercepting dust and being resistant to disinfection and local high temperatures.
Pharmaceutical clean area (Production of sterile drugs/antibiotics
The production of antibiotics (such as penicillin) and vaccines must be carried out in a clean area of Class D or above. Dust and microbial carriers in the air (such as bacteria attached to dust) can cause drug contamination and batch scrapping. At the same time, some processes (such as drying and sterilization) will generate local high temperatures (120-180℃).
Function of the filter As the core of medium-efficiency filtration in the ventilation system of clean areas, it intercepts dust and microbial carriers larger than 5μm in fresh air or recirculated air, providing “pre-protection” for subsequent high-efficiency filtration (such as HEPA in biosafety cabinets and aseptic filling lines) It complies with the requirements for “airborne particles” stipulated in the “Good Manufacturing Practice (GMP) for Pharmaceutical Products” (for example, the number of particles ≥5μm in the D-class clean area is ≤ 290,000 per cubic meter). Some sterilization-resistant models (capable of withstanding formaldehyde and hydrogen peroxide fumigation) can be adapted to the regular disinfection needs of sterile areas, preventing the growth of microorganisms on filter materials.
High-temperature food processing (baking/spray drying)
When baking cookies and spray drying milk powder, food dust (such as flour particles and milk powder particles) at high temperatures (120-200℃) is produced. If directly discharged, it will cause air pollution. If it enters the air conditioning system, it will lead to cross-contamination in the workshop (such as flour dust mixing into milk powder).
The function of the filter: Installed in the exhaust duct of the workshop, it efficiently captures food dust (filtration efficiency F7 grade, ≥80%@0.5μm) by taking advantage of the temperature resistance of the fiberglass filter material (above 200℃), preventing dust emissions from exceeding the standard (in compliance with the “Integrated Emission Standard of Air Pollutants” GB 16297). At the same time, the filter material has no odor, no migrating substances, will not contaminate food, and meets food safety requirements.
Iii. Aerospace and High-End Equipment Manufacturing: Suitable for precision processing and resistant to special working conditions
Components in aerospace and high-end equipment manufacturing (such as turbine blades and precision bearings) have strict requirements for “dimensional accuracy and surface finish”, and may be accompanied by local high temperatures and oil mist environments. Fiberglass bag filters can specifically address these filtration needs
Processing of aero engine/gas turbine components
When processing turbine blades (made of high-temperature resistant alloy materials), metal cutting will produce alloy chips (such as titanium alloys and nickel-based alloys) of 1-10μm. If they adhere to the blade surface, it will affect the subsequent grinding accuracy (the blade tolerance needs to be controlled within 0.01mm). At the same time, a small amount of oil mist (atomization of cutting fluid) will be produced during the cutting process, which is prone to clogging ordinary filter materials.
The function of the filter: In the clean ventilation system of the processing workshop, it intercepts metal debris to prevent it from entering the machine tool or adhering to the surface of components. The oil resistance and anti-clogging property of fiberglass filter material (with a dust holding capacity 20%-30% higher than that of ordinary polyester filter material) can adapt to oil mist environments, reduce the frequency of filter replacement, and ensure continuous production.
High-end precision instruments (sensors/precision motors)
During the assembly process of MEMS sensors (such as mobile phone gyroscopes) and precision motors (such as drone motors), dust particles of 0.1 to 1μm can cause component jamming and signal deviation. Some motor winding processes can generate local high temperatures (such as 150℃ when drying insulating varnish).
The function of the filter: As a medium-efficiency filter unit in the assembly workshop, it intercepts fine dust, and at the same time, it can withstand local high temperatures to prevent the filter material from deforming or releasing harmful substances, ensuring the accuracy of the instrument (for example, the measurement error of the MEMS sensor needs to be ≤0.001mm).
Iv. Optics and New Energy Manufacturing: Controlling Tiny Impurities to Ensure Product Performance
Optical devices and new energy products are sensitive to “surface cleanliness and material purity”. Fiberglass bag filters, through high-precision filtration and low-pollution characteristics, prevent impurities from affecting the core functions of the products
Optical instrument manufacturing (lenses/laser devices)
Scene requirements: During the coating/polishing process of camera lenses and lidar lenses, dust particles larger than 0.3μm will adhere to the surface of the lenses, resulting in a decrease in light transmittance (for example, the light transmittance of the lens needs to be ≥99.5%) and laser scattering. The high temperature of the evaporation source during coating (above 200℃ in some areas) also has requirements for the heat resistance of the filter material.
The function of the filter: Installed in the ventilation system of the optical clean workshop, it efficiently intercepts dust particles ranging from 0.3 to 1μm (filtration efficiency H10 grade, ≥95%@0.3μm). Meanwhile, the glass fiber filter material contains no volatile substances and no fiber shedding, preventing contamination of the lens surface. The local high-temperature resistance property can adapt to the environmental requirements of the coating process.
New energy materials manufacturing (lithium batteries/photovoltaic modules)
Scene requirement: When lithium battery cathode materials (such as ternary materials) are mixed, 1-5μm of powder will be produced. If mixed into the battery cells, it will cause internal short circuits. When welding photovoltaic modules (solar cells), dust from the welding tape and glass debris can affect the conductivity of the solar cells and reduce the conversion efficiency of the photovoltaic panels (which needs to be controlled above 23%).
The function of the filter: In the ventilation systems of the material mixing workshop and component assembly workshop, it intercepts the powder of cathode materials and the dust of soldering strips, preventing them from spreading to other processes (such as battery cell packaging). The chemical stability of fiberglass filter material (resistant to lithium salt corrosion in the electrolyte) can be adapted to the slightly corrosive environment in lithium battery workshops, thus extending the service life of the filter.
Summary: The core logic of applications in special manufacturing fields
The application of fiberglass bag filters in special manufacturing fields essentially lies in “meeting the special demands of scenarios with ‘environmental adaptability’ and ensuring product quality with ‘high-precision filtration'”. Its irreplaceable advantages are reflected in three aspects:
Performance compatibility: Medium and high efficiency filtration accuracy (F7-H10 grade) can cover 0.3-5μm dust, meeting the clean requirements of precision manufacturing.
Environmental resistance: Resistant to high temperatures of 200-300℃, mild corrosion, and oil mist, solving the problems of “easy deformation and easy clogging” of common filter materials (such as polyester) under special working conditions.
Compliance: Low dust generation, no migrating substances, in line with industry standards in fields such as electronics, pharmaceuticals, and food (such as GMP, semiconductor cleanliness standards), preventing the filter material itself from becoming a source of pollution.
When making a selection, it is necessary to focus on matching the cleanliness level of the scene (such as F8 or H10), the temperature range (such as whether it exceeds 200℃), and whether there is corrosion/oil mist, to ensure that the filter is precisely compatible with the manufacturing process.
