PP Melt-Blown Filter Cartridge: Gradient Structure for Uncompromising Fluid Purity

1. Introduction

Engineered with a three-layer gradient design (loose→compact→precise) and food-grade polypropylene, the PP Melt-Blown Filter Cartridge eliminates particles, bacteria, and turbidity down to 1μm. Its self-reinforcing structure resists pressure deformation, while the needle-punched surface boosts flow efficiency—making it the go-to pre-filter for RO systems, food production, and industrial chemical processing.

2. Features

① Gradient Filtration Efficiency

A three-layer structure (loose outer layer → compact middle layer → precise inner layer) traps impurities incrementally:

• Outer layer: Captures large particles (sediment, rust) to reduce initial flow resistance.

• Middle layer: Intercepts medium-sized contaminants (colloids, organic debris).

• Inner layer: Blocks fine particles (down to 1μm) and microorganisms.
  This design boosts dirt-holding capacity by 30% vs. single-layer filters, extending service life.

② Food-Grade Safety

Constructed from 100% pure PP, the cartridge meets FDA standards, ensuring no secondary contamination. Ideal for potable water, food, and pharmaceutical applications.

③ Enhanced Pressure Resistance

An inner-threaded structure reinforces mechanical strength, withstanding up to 0.5 MPa differential pressure without deformation—minimizing bypass risks.

④ Needle-Punched Surface

The needle-punched design increases the effective filtration area by 25%, promoting smooth flow and reducing clogging in high-particulate environments.

3. Technical Data

4. Working Principle

The PP melt-blown cartridge operates via a gradient porous mechanism:

1. Fluid Inflow: Contaminated fluid enters the outer loose layer, where large particles (e.g., sediment, rust) are trapped.

2. Intermediate Filtration: As fluid moves to the compact middle layer, medium-sized impurities (colloids, organic debris) are mechanically intercepted.

3. Fine Filtration: The precise inner layer blocks fine particles (≥1μm) and microorganisms, ensuring ultra-clean output.

Over time, accumulated contaminants increase the pressure differential across the cartridge—indicating the need for replacement.

5. Application Field

① Drinking Water Purification

• Pre-filtration for RO systems in households and commercial plants, protecting membranes from sediment and turbidity.

② Industrial Fluid Treatment

• Filters acidic/alkaline solutions, plating baths, and chemical solvents in petrochemical, metallurgy, and electroplating industries.

③ Food & Beverage

• Clarifies juice, beer, and dairy products, ensuring compliance with FDA/HACCP standards.

④ Electronics & Pharmaceuticals

• Produces ultra-pure water for semiconductors and injectable drugs, removing particles >1μm.

⑤ Wastewater Recycling

• Treats industrial wastewater (printing ink, tannery effluent) for reuse or discharge compliance.

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6. Q&A

Q1: How often should I replace the filter?

A: Replace when the pressure differential reaches 0.2MPa or after 3–6 months of continuous use (varies by fluid quality). Monitor pressure gauges for timely changes.

Q2: Can it filter bacteria and viruses?

A: Yes! A 1μm precision cartridge blocks most bacteria (e.g., E. coli, 1–5μm) and protozoa. For viruses (<0.1μm), pair with RO or UV disinfection.

Q3: Is the material safe for drinking water?

A: Absolutely. The PP material is FDA-approved, non-toxic, and chemically inert—no leaching into potable water.

Q4: Can I customize the filter?

A: Yes! We offer custom lengths (5”–60”), precision (1–50μm), and connection types (e.g., 226, 222 threads) to match your system.

Q5: What’s the maximum operating temperature?

A: The cartridge handles up to 80°C. For higher temperatures, contact us for heat-resistant material options.