In fluid processing scenarios—from municipal water treatment to industrial wastewater recycling—suspended solids, colloids, and fine particles (1–100μm) degrade fluid quality and damage downstream equipment. As a listed filtration specialist (Stock Code: 837936), LEFILTER’s Melt-Blown Filter Cartridge delivers cost-effective, reliable purification. Made from food-grade polypropylene (PP) via one-step melt-blowing technology, it achieves 99.8% particle retention while offering high dirt-holding capacity and chemical resistance—ideal for pre-filtration or standalone purification needs.
Gradient Pore Structure: The cartridge is formed by melting and extruding PP resin into microfibers, which are stacked into a gradient pore structure (outer loose, inner dense). This design first traps large particles (50–100μm) on the surface, then captures fine contaminants (1–50μm) in inner layers—minimizing pressure drop (≤0.08MPa at full flow) and extending service life by 40% vs. non-gradient filters.
Food-Grade Safety: The PP material complies with FDA 21 CFR §177.1520 and EU 10/2011 standards—non-toxic, odorless, and free of extractables, making it safe for drinking water, beverage, and pharmaceutical pre-filtration.
Integrated Design: No glue or adhesives are used in production—media and end caps are heat-fused into one piece, avoiding secondary contamination from chemical binders.
Pressure Resistance: The PP media’s inherent rigidity withstands ≤0.6MPa operating pressure, preventing collapse even when saturated with contaminants.
Corrosion Resistance: Resists acids (pH 2–13), alkalis, and most organic solvents—suitable for industrial wastewater (e.g., electroplating rinse water) and chemical fluid filtration.
Tailor to your system: standard lengths (10–40 inch), outer diameters (63mm/114mm), and filtration precisions (1–100μm). For special needs (e.g., high-temperature fluids up to 80℃), we offer modified PP media; for food applications, add a hydrophilic coating to improve water flow.
| Parameter | Standard Details | Custom Options |
|---|
| Filtration Precision | 1μm, 5μm, 10μm, 20μm, 50μm, 100μm | 0.5μm (ultra-fine for electronics) |
| Outer Diameter | 63mm, 114mm (±2mm) | 80mm, 120mm (for non-standard housings) |
| Inner Diameter | 28mm, 45mm (±1mm) | 30mm, 50mm (match housing ports) |
| Length Options | 10-inch (254mm), 20-inch (508mm), 30-inch (762mm), 40-inch (1016mm) (±3mm) | Custom lengths (5–60 inch) |
| Operating Pressure | ≤0.6MPa | ≤0.8MPa (reinforced media) |
| Temp Range | 0℃~60℃ (standard PP); 0℃~80℃ (modified PP) | 0℃~90℃ (high-temperature PP blend) |
| Flow Rate | 10–30 L/min (10-inch); 20–60 L/min (20-inch) | Up to 80 L/min (large-diameter models) |
| Dirt-Holding Capacity | 30–50g (10-inch); 60–100g (20-inch) | Up to 150g (high-capacity media) |
The cartridge’s performance relies on its unique melt-blown gradient structure, which enables three key filtration mechanisms:
Surface Filtration (Outer Layer): Contaminated fluid enters the cartridge from the outside. The loosely packed outer PP fibers (pore size 50–100μm) trap large particles (e.g., sediment, rust) via mechanical interception—preventing them from clogging the finer inner layers.
Depth Filtration (Middle Layer): As fluid flows inward, the gradually denser PP fibers (pore size 10–50μm) capture medium-sized contaminants. These fibers form a "labyrinth" that slows fluid flow, increasing contact time and ensuring particles are trapped via inertial impaction (for 10–50μm) and Brownian diffusion (for 1–10μm).
Fine Filtration (Inner Layer): The innermost dense fiber layer (pore size 1–10μm) catches residual fine particles. Filtered fluid then flows through the inner cavity and exits the cartridge—delivering purified fluid that meets process or discharge standards.
Case: A Beijing community used 10μm melt-blown cartridges as pre-filtration for RO drinking water systems.
Result: Sediment and colloids in tap water were reduced by 99%, RO membrane service life extended from 2 years to 3 years, cutting replacement costs by 33%.
Case: A Guangdong electroplating factory used 20μm cartridges to filter rinse water (containing metal hydroxides).
Result: Suspended solids in water dropped from 50mg/L to <5mg/L, meeting recycling standards—water reuse rate increased by 40%, saving ¥120k/year in water fees.
Case: A Zhejiang juice factory used 5μm food-grade cartridges to filter fruit pulp from juice.
Result: Juice turbidity reduced from 5 NTU to <1 NTU, product shelf life extended by 15%, and cleaning frequency of filling equipment halved.
Case: A Jiangsu semiconductor plant used 1μm cartridges for pre-filtration of ultra-pure water (UPW) systems.
Result: Particles ≥1μm in pre-treated water were removed by 99.8%, reducing UPW system downtime caused by membrane fouling by 60%.
A1: Yes—compared to string-wound cartridges, our melt-blown model has 30% higher dirt-holding capacity, 20% lower pressure drop, and no fiber shedding (a common issue with string-wound). It’s a more cost-effective pre-filtration choice for RO, UF, or ion-exchange systems.
A2: Replace when: ① Pressure drop across the cartridge exceeds 0.1MPa (most systems have pressure gauges); ② Fluid turbidity/post-filtration particle count rises above your standard; ③ Service life reaches 1–3 months (varies by contamination level—e.g., 1 month for wastewater, 3 months for tap water).
A3: Yes—standard PP media resists pH 2–13 (e.g., 5% sulfuric acid, 10% sodium hydroxide). For stronger acids/alkalis (pH <2 or >13), we offer PTFE-blended melt-blown media that maintains performance without degradation.
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