BFE 99 Meltblown Filter Fabric — Wholesale Supplier for Surgical Mask Manufacturers
BFE 99 meltblown filter fabric is the critical filtration layer in surgical masks and medical respirators. Manufacturers sourcing BFE 99 meltblown filter fabric require consistent electret charge performance, certified ASTM F2101 test data, and lot-to-lot uniformity across production runs. Favourite Fab supplies BFE 99 meltblown nonwoven directly to surgical mask OEMs, N95 producers, and respirator assemblers across India and 50+ export markets — with flexible MOQ, full test documentation, and technical support.
What Is BFE 99 Meltblown Filter Fabric
Meltblown nonwoven is produced by extruding molten polypropylene through a high-velocity hot-air stream that attenuates the polymer into ultrafine fibers ranging from 1 to 5 microns in diameter. These fibers are collected as a random entangled web with very high surface area and tight interfiber spacing.
BFE 99 refers to a Bacterial Filtration Efficiency of 99% or higher, measured per ASTM F2101. This test challenges the fabric with a nebulized Staphylococcus aureus aerosol at a defined airflow and particle size distribution. Achieving BFE 99 requires both fine fiber structure and electrostatic charge enhancement — a process called electret treatment. Electret meltblown carries a permanent surface charge that captures submicron particles through electrostatic attraction, not just mechanical interception.
For surgical mask applications, meltblown filter fabric is typically produced in a GSM range of 18 to 40. The filter layer sits between two spunbond layers in a standard surgical mask construction. BFE 99 fabric is also used as the primary filtration layer in KN95, FFP2, and some N95-class respirators where high BFE and PFE performance is required.
How Electret Charge Determines BFE 99 Performance
Raw meltblown fabric — without electret treatment — relies on mechanical interception alone. Fine fibers catch particles larger than the interfiber gap, but submicron particles and bacteria-carrying aerosol droplets pass through easily. Mechanical-only meltblown at typical mask GSM achieves BFE of 70–85%. That is inadequate for surgical mask compliance.
Electret treatment adds a permanent electrostatic charge to the fiber surface. Charged fibers attract and hold submicron particles through electrostatic attraction even when the particle is smaller than the fiber gap. This is how 25 GSM meltblown achieves BFE 99 — the charge, not the mass, does the filtration work. Two electret methods are used commercially: corona discharge (high-voltage electrical treatment) and hydrocharging (water-jet impingement followed by drying). Hydrocharged electret retains charge better in humid conditions, which matters for masks worn in operating rooms or tropical climates.
Charge decay is the main quality risk in meltblown supply. Fabric stored near chemical vapours, solvents, or high humidity loses charge faster. Favourite Fab stores meltblown rolls in controlled-environment warehouses and ships with moisture-barrier packaging. We include charge retention test data with each lot so your incoming QC can flag degraded rolls before they enter your mask production line.
BFE 99 Meltblown Filter Fabric — Specifications and Options
Favourite Fab supplies BFE 99 meltblown filter fabric in a range of GSM, width, and charge configurations. All lots are tested at accredited third-party laboratories. Specifications below reflect standard production grades with custom options available for volume buyers.
| Parameter | Specification | Detail |
|---|---|---|
| GSM Range | 18 – 40 GSM | 25 GSM standard for 3-ply surgical mask; 40 GSM for enhanced filtration grades |
| Bacterial Filtration Efficiency (BFE) | ≥ 99% | Tested per ASTM F2101 with S. aureus challenge aerosol at 28.3 L/min airflow |
| Particulate Filtration Efficiency (PFE) | ≥ 95% at 0.1 µm | Tested per MIL-M-36954C; higher PFE grades available at ≥ 99% for respirator applications |
| Differential Pressure (ΔP) | ≤ 5.0 mmH2O/cm² | Tested per EN 14683 Annex C; low ΔP ensures breathability in finished mask |
| Fiber Diameter | 1 – 5 microns (mean ~2 µm) | Ultrafine fiber structure contributes to both BFE and PFE performance |
| Fabric Width | 160 cm / 240 cm | Slit to custom width for mask machine line requirements |
| Electret Charge Type | Corona / Hydrocharging | Corona electret standard; hydrocharged electret available for superior charge retention in humid conditions |
| Hydrophobicity | Class III (AATCC 22) | Water repellent surface prevents moisture-induced charge decay during mask wear |
Why Source From Favourite Fab
- MOQ-friendly: We supply qualification lots and full production runs. Emerging mask OEMs can start with trial quantities to validate our fabric on their machine lines.
- Export-ready: Supply to 50+ countries with COA, test reports (ASTM F2101, EN 14683), commercial documentation, and HS code guidance for medical nonwoven imports.
- ISO certified: Manufacturing under ISO 9001 quality management. Electret treatment process controlled for charge uniformity and lot consistency.
- 10+ years in nonwoven supply: We have served mask manufacturers, respirator OEMs, and filtration media producers since 2014 across global markets.
- Custom specs on request: GSM, width, charge level (BFE 95 / BFE 99 / BFE ≥99.9%), and hydrophobic treatment can be tuned to your machine specifications.
- Full test documentation per lot: Every shipment includes BFE, PFE, ΔP, and hydrophobicity test certificates from accredited labs for your regulatory file.
Meltblown Filter Fabric in Surgical Mask Construction
A standard 3-ply surgical mask contains three nonwoven layers. The outer layer is a coloured or white spunbond for water repellency and structure. The inner layer (skin-facing) is a soft spunbond for comfort. The middle layer is the meltblown filter fabric — the BFE 99 grade that determines the mask’s bacterial filtration claim.
Mask machine line settings depend on meltblown roll width and tension characteristics. Favourite Fab supplies meltblown in slit widths matched to common mask machine specifications — typically 175 mm for standard adult masks and 250 mm for folded designs. Roll length and core diameter are configurable to match your unwind stations. If you are setting up a new mask production line, share your machine make and model and we will recommend the optimal roll configuration to reduce machine stops.
For KN95 and FFP2 mask constructions, the meltblown filter layer is typically doubled — two layers of 25 GSM meltblown — or a single layer of 35–40 GSM high-density meltblown is used. Both approaches can achieve the PFE ≥ 94% required for KN95 compliance. We supply both single-layer and double-layer grade meltblown and can provide PFE data at your chosen construction GSM to support your regulatory dossier.
Pricing and MOQ
Favourite Fab offers competitive wholesale pricing on BFE 99 meltblown filter fabric. Pricing depends on GSM, width, charge grade, and order volume. We do not publish fixed rates — all enquiries receive a tailored quotation.
MOQ is flexible. Trial orders for machine qualification are accepted. Volume buyers receive structured pricing tiers with preferred lead times. To receive a quotation, share your target GSM, mask type (surgical / KN95 / FFP2), monthly volume, and destination port. Our team responds within one business day.
How to Order
- Send your specification: Email or WhatsApp us with target GSM, filtration grade (BFE 99 or PFE grade), roll width, and estimated monthly volume.
- Receive quotation and sample: We send a formal quotation with pricing, lead time, and a sample roll for your mask machine line validation and in-house testing.
- Confirm and ship: On purchase order confirmation, we produce and ship with full lot test documentation and commercial paperwork. Contact us at sale@favouritehub.com.
Frequently Asked Questions
Q: What is the difference between BFE 95 and BFE 99 meltblown filter fabric?
A: BFE 95 means the fabric filters 95% of a standardized bacterial aerosol under ASTM F2101 test conditions. BFE 99 filters 99% of the same aerosol. The higher BFE is achieved through finer fiber diameter, higher basis weight (GSM), or stronger electret charge. Surgical masks for operating room use and Type IIR masks (EN 14683) require BFE ≥ 98%, so BFE 99 provides the compliance margin most mask OEMs need.
Q: Does electret charge degrade over time or with humidity?
A: All electret charges decay over time. Standard corona-charged meltblown retains effective BFE for 12–18 months under normal storage conditions (cool, dry, away from UV). Hydrocharged electret performs better under high relative humidity during mask wear. We supply charge-retention data on request so your QC team can set shelf-life protocols for finished masks.
Q: Can I use Favourite Fab BFE 99 meltblown for N95 or FFP2 respirator production?
A: Our BFE 99 meltblown achieves PFE ≥ 95% at 0.1 µm in standard grades. For N95 (NIOSH) or FFP2 (EN 149) compliance, the finished mask must pass NIOSH or NELSON LABS testing. We supply meltblown that meets the raw material performance inputs for these products. Final respirator compliance depends on your complete construction (layers, nose wire, earloop, fit). We can provide PFE ≥ 99% grades for high-performance respirator applications.
Q: What roll dimensions does Favourite Fab supply for mask machine lines?
A: We supply standard rolls at 160 cm and 240 cm width, slit to custom widths based on your machine specification (commonly 175 mm, 250 mm slit rolls for mask machines). Roll length is configurable. Share your machine make and line speed requirements and we will recommend the optimal roll configuration to minimize changeover downtime.
Q: What test reports are included with each shipment of meltblown filter fabric?
A: Every lot ships with a Certificate of Analysis (COA) covering GSM, BFE (ASTM F2101), differential pressure (EN 14683 Annex C or equivalent), and hydrophobicity. PFE test data per MIL-M-36954C is available on request. Third-party lab reports from NABL-accredited laboratories are available for regulatory submissions in regulated markets.
Q: Does Favourite Fab supply polypropylene meltblown only, or other polymers as well?
A: Our standard BFE 99 filter fabric is 100% polypropylene (PP) — the industry standard for electret meltblown filtration media. PP is chemically inert, latex-free, and suitable for direct skin contact in mask applications. For specialty filtration applications requiring other polymers or fiber blends, contact us to discuss feasibility.
Contact Favourite Fab
Favourite Fab is a B2B raw material supplier for the global mask and respirator manufacturing industry. We supply BFE 99 meltblown filter fabric to surgical mask OEMs, N95 producers, and filtration media converters across 50+ countries.
To request a quotation, sample roll, or lot test reports, contact our sales team directly:
- Email: sale@favouritehub.com
- WhatsApp: +91-9528811566
Share your target GSM, filtration grade, roll width, and monthly volume. Our team sends a detailed quotation within one business day. Request your BFE 99 meltblown filter fabric sample today.
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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.
