HEPA Nanofibre Filtration Nonwoven Media — Electrospun Grade India
HEPA (High-Efficiency Particulate Air) nanofibre filtration nonwoven media uses electrospun nanofibres (100–500 nm diameter) deposited on a support substrate to achieve H13–H14 HEPA filtration efficiency (≥99.95% at MPPS — most penetrating particle size 0.1–0.3 micron) at lower pressure drop than conventional meltblown media. The ultrafine electrospun layer intercepts sub-micron particles through diffusion, interception, and inertial impaction — enabling thinner filter media with superior efficiency. Used in clean rooms, medical air handling, automotive cabin filters, and respiratory protection.
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Specifications
| Property | Specification |
|---|---|
| Fibre diameter | 100–500 nm (electrospun layer) |
| Filtration efficiency | H13 ≥99.95%, H14 ≥99.995% (EN 1822) |
| Pressure drop | 50–150 Pa at 5.3 cm/s face velocity |
| Support substrate | Meltblown 25–40 GSM or PET spunbond |
| Width | 160–200 cm |
| MOQ | 500 kg |
FAQ
What is the difference between meltblown and electrospun nanofibre?
Meltblown fibres: 1–5 micron diameter. Electrospun nanofibres: 0.1–0.5 micron diameter — 10–50× finer. Finer fibres = higher filtration efficiency at lower basis weight. Electrospun H14 media achieves ≥99.995% efficiency with 30–50% lower pressure drop vs equivalent efficiency meltblown media.
What applications need HEPA nanofibre media?
ISO Class 5 cleanrooms (semiconductor, pharmaceutical), hospital HVAC (infection control), cabin air filters (automotive premium), N99/FFP3 respirators, and high-purity gas filtration. Wherever H13/H14 efficiency is required with energy efficiency (low pressure drop) constraints.
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B2B Applications & End-Uses
Electrospun nanofibre filtration media represents a step-change in filtration performance relative to conventional spunbond or meltblown nonwoven. The fundamental physics are decisive: filtration efficiency in the most-penetrating particle size range (MPPS, typically 0.1–0.3 micron for HEPA applications) scales with fibre diameter. Conventional spunbond fibres at 15–35 micron diameter capture particles primarily through impaction and interception mechanisms, which are effective at larger particle sizes but lose efficiency in the sub-micron range. Electrospun nanofibre at 100–500 nm diameter activates diffusion capture — the dominant mechanism for sub-micron particles — creating a high-efficiency filtration zone at drastically lower basis weight and with significantly lower pressure drop than equivalent glass microfibre HEPA media.
This combination — higher efficiency at lower pressure drop — is the commercial value proposition driving industrial adoption of electrospun nanofibre filtration media across multiple sectors:
- HVAC HEPA and ULPA filter manufacturers — Commercial and industrial HVAC systems in pharmaceutical manufacturing, hospital operating theatres, and semiconductor cleanrooms require HEPA (H13/H14 per EN 1822) or ULPA (U15/U16) filter elements. Nanofibre media enables filter elements to meet EN 1822 efficiency thresholds at lower fan motor energy consumption, a significant lifecycle cost advantage in continuously operating HVAC systems.
- Respiratory protection OEMs (N99/FFP3 respirator media) — Nanofibre filtration layers in flat-fold and cup-shaped respirators provide the particle capture efficiency required for N99 and FFP3 rating while maintaining breathability (low pressure drop) for extended wear in occupational settings. Critical for healthcare, mining, and construction PPE.
- Pharmaceutical cleanroom filter fabricators — ISO Class 5 (formerly Class 100) and ISO Class 6 cleanrooms in pharmaceutical manufacturing require terminal HEPA filter elements with H14 (≥99.995% at MPPS) efficiency. Nanofibre media enables smaller filter element footprint while maintaining classification compliance.
- Industrial air filtration equipment OEMs — Gas turbine inlet filters, industrial dust collection systems, and process gas filtration units in power generation and chemical processing industries are adopting nanofibre media for extended service life and reduced maintenance frequency.
- Automotive cabin air filter manufacturers — PM2.5 and ultrafine particle filtration in cabin air filters for passenger vehicles is an emerging application, particularly for the EV market where cabin air quality is a differentiating OEM product claim.
Certifications & Quality Assurance
Nanofibre HEPA filtration media requires a quality assurance framework calibrated to the exacting standards of the filter manufacturing industry:
- EN 1822 — HEPA/ULPA Classification Testing: Filter media efficiency at MPPS is the defining certification parameter. H13 classification requires ≥99.95% particle capture at MPPS; H14 requires ≥99.995%. Media lots are tested using the sodium flame (NaCl aerosol) or oil aerosol method per EN 1822-3, with results documented per production lot and traceable to roll identity.
- Pressure Drop (Initial Resistance) Testing: Differential pressure across the media at rated face velocity is measured per EN 1822 and documented alongside efficiency. The efficiency-to-pressure-drop ratio is the key performance index for HVAC energy efficiency calculations.
- Fibre Diameter Characterisation: SEM (scanning electron microscopy) analysis confirms nanofibre diameter distribution within the 100–500 nm specification range. Representative SEM images and fibre diameter statistics are available in technical data sheets for each nanofibre grade.
- Substrate Compatibility: Nanofibre layers are deposited on PAN, PET, or nylon substrate nonwovens depending on application requirements. Substrate tensile, thermal resistance, and chemical compatibility are documented to support filter element design across the full operating environment range.
- Humidity and Temperature Stability: Efficiency retention after exposure to defined humidity cycles (per EN 1822-2 conditioning protocols) is verified. HVAC filter applications in humid climates require stability data to support year-round efficiency claims.
- ISO 9001:2015 QMS: Full lot traceability, calibrated test equipment, and documented corrective action protocols underpin all nanofibre media quality assurance activities.
More Questions Answered
What substrate nonwoven is recommended under the electrospun nanofibre layer for HEPA filter media construction?
Substrate selection depends on the downstream filter element manufacturing process and the operating environment of the finished filter. PET spunbond substrates (30–80 GSM) are the most widely used because of their dimensional stability across humidity and temperature ranges typical in HVAC applications, good compatibility with pleating processes used in HEPA panel filter construction, and resistance to the organic solvents used in some filter element potting compounds. Nylon substrates offer superior chemical resistance for aggressive industrial gas filtration environments. PAN substrates are used in speciality high-temperature filtration applications. Favourite Fab can supply the nanofibre layer on customer-specified substrate or recommend a substrate-nanofibre combination based on your pleating process parameters and operating temperature range.
How does electrospun nanofibre media compare to meltblown nonwoven for FFP3 respirator filtration efficiency?
Meltblown nonwoven is the standard filtration layer in most FFP2 and FFP3 respirators currently produced. Electret-charged meltblown fibres (typically 1–5 micron diameter) achieve FFP3-equivalent efficiency through electrostatic capture of sub-micron particles. However, electrostatic charge decays with humidity exposure, mechanical stress, and time — a phenomenon known as charge decay — which can reduce effective filtration efficiency below the rated level under conditions of extended use or storage. Electrospun nanofibre media achieves equivalent or superior efficiency through mechanical capture (diffusion) rather than electrostatic attraction, making efficiency independent of charge state and therefore more stable across humidity exposure, extended wear time, and storage duration. For applications where respirator performance must remain demonstrably compliant throughout a defined service period under variable environmental conditions, nanofibre media provides a technically more robust filtration mechanism than electret meltblown.
Gaurav Garg
I'm Gaurav Garg, CEO of Favourite Fab, a company on a mission to revolutionize the nonwoven industry with sustainable practices. We work hand-in-hand with manufacturers and suppliers who share our commitment to eco-friendly production. With a deep interest in textile innovation, I'm passionate about educating consumers about sustainable material options and their potential to transform the nonwoven landscape.
