Core advantages: Chemical resistance | Mechanical durability | Low extractables | Cost efficiency | Extends downstream filter lifetime by 3-5×
Availability: In Stock
PP Membrane Filter
Description
High-strength microporous membrane for industrial prefiltration, laboratory clarification, and chemical-resistant liquid processing. Serves as a protective prefilter layer in multi-stage systems.
What is a PP Membrane Filter? (Technical Definition)
A PP membrane filter is a thermally bonded microporous polypropylene structure that operates via surface filtration – particles larger than the pore size are retained on the surface, preventing clogging of downstream filters. Its key advantage lies in the combination of high chemical resistance, mechanical durability, low extractables, and cost efficiency.
Industrial Performance Characteristics
Filtration type: Surface filtration
Material: Polypropylene (PP)
Structure: Microporous thermoplastic
Function: Prefiltration / protection layer
Max temp: ~80°C (continuous)
Chemical resistance: Acids, bases, alcohols, organics
Extractables: Very low
Key Advantages of PP Membrane Filter
- Excellent chemical resistance (acids, bases, solvents)
- High mechanical strength & pressure stability
- Low-cost prefiltration solution
- Wide pore size selection (0.22-0µm)
- Multiple diameters (13-293mm) for all housings
- Extends downstream membrane life by 3-5×
- Low extractables -minimizes contamination
- Surface filtration -easy cleaning & reuse
Industrial Applications (High-Intent)
- Pharmaceutical prefiltration systems
- HPLC sample preparation protection
- Chemical plant liquid clarification
- Industrial water treatment pre-stage filtration
- Bioprocess buffer protection filtration
- Downstream sterile filter protection (0.22µm)
- Laboratory sample clarification
- Protective filtration for PES / PTFE / PVDF / Nylon
PP vs Other Membranes – Engineering Comparison
| Type | Function Role | Strength | Limitation |
| PP | Prefiltration / protection | Low cost + chemical resistance | Not sterilizing-grade |
| PES | Biological filtration | High flow rate | Lower solvent resistance |
| PTFE | Solvent & gas filtration | Extreme chemical resistance | Hydrophobic, expensive |
| PVDF | Pharma filtration | Balanced performance | Higher cost |
| Nylon | HPLC & solvent prep | Strong + hydrophilic | Protein binding |
Explore our full range: PTFE, PES, PVDF, and Nylon membrane filters.
Chemical Compatibility Matrix (Industrial Standard)
| Chemical Type | Compatibility |
| Acids (HCl, H₂SO₄) | Excellent |
| Bases (NaOH, KOH) | Excellent |
| Alcohols (EtOH, IPA) | Good |
| Hydrocarbons | Moderate |
| Strong oxidizers | Limited |
Technical Specifications – Diameter & Packaging
All pore sizes are available in the following diameters (packaging quantities per pack):
| Pore Size | 13 mm | 25 mm | 47 mm | 50 mm | 60 mm | 90 mm | 142 mm | 293 mm |
| 0.22 µm | 400/pk | 200/pk | 100/pk | 100/pk | 50/pk | 50/pk | 50/pk | 50/pk |
| 0.45 µm | 400/pk | 200/pk | 100/pk | 100/pk | 50/pk | 50/pk | 50/pk | 50/pk |
| 1.0 µm | 400/pk | 200/pk | 100/pk | 100/pk | 50/pk | 50/pk | 50/pk | 50/pk |
| 5.0 µm | 400/pk | 200/pk | 100/pk | 100/pk | 50/pk | 50/pk | 50/pk | 50/pk |
Quantities may vary for custom orders. Contact us for bulk pricing.
Why PP Membrane is Used as Prefilter (Core Insight)
In multi-stage filtration systems, PP membranes act as a front-line barrier, removing high-load particulate matter before it reaches fine membranes. This design significantly:
- Reduces membrane fouling
- Increases filtration throughput
- Extends final filter lifetime (up to 3-5×)
- Lowers total operational cost
PP Membrane Filter Selection Logic (Decision Framework)
If your priority is:
- Cost reduction— Choose PP membrane
- Chemical resistance— Choose PP or PTFE
- Sterile filtration— Use PP as prefilter + 0.22μm final filter
- Biological samples— Use PES (not PP alone)
Need the full technical datasheet?
Get detailed specifications, chemical compatibility charts, and dimensional drawings.
Download PDF Datasheet
Frequently Asked Questions
What is a PP membrane filter used for?
It is used for prefiltration, clarification, and protection of downstream fine filters in laboratory and industrial processes.
Is PP membrane hydrophobic?
Yes, polypropylene is naturally hydrophobic but can be surface-treated for specific applications.
Can PP membrane filter solvents?
Yes, it has good resistance to many organic solvents, acids, and bases.
What is the difference between PP and PTFE membranes?
PP is cost-effective and general-purpose, while PTFE is used for aggressive chemicals and gas filtration.
What is the difference between PP and nylon membrane?
PP is cheaper and more chemically resistant; nylon is more suitable for analytical filtration (HPLC).
Why use PP as a prefilter before PTFE or PES?
To reduce particle load and extend downstream membrane lifespan by up to 3-5 times, lowering total operational cost.
Scanning Electron Microscope Picture
| Item Code | Description | Package(pcs/pk) |
| 11207101 | 0.22(μm), 13(mm) | 400 |
| 11207102 | 0.22(μm), 25(mm) | 200 |
| 11207103 | 0.22(μm), 47(mm) | 100 |
| 11207104 | 0.22(μm), 50(mm) | 100 |
| 11207105 | 0.22(μm), 60(mm) | 50 |
| 11207106 | 0.22(μm), 90(mm) | 50 |
| 11207109 | 0.22(μm), 142(mm) | 50 |
| 11207113 | 0.22(μm), 293(mm) | 50 |
| 11207114 | 0.45(μm), 13(mm) | 400 |
| 11207115 | 0.45(μm), 25(mm) | 200 |
| 11207116 | 0.45(μm), 47(mm) | 100 |
| 11207117 | 0.45(μm), 50(mm) | 100 |
| 11207118 | 0.45(μm), 60(mm) | 50 |
| 11207119 | 0.45(μm), 90(mm) | 50 |
| 11207122 | 0.45(μm), 142(mm) | 50 |
| 11207126 | 0.45(μm), 293(mm) | 50 |
| 11207127 | 1.0(μm), 13(mm) | 400 |
| 11207128 | 1.0(μm), 25(mm) | 200 |
| 11207129 | 1.0(μm), 47(mm) | 100 |
| 11207130 | 1.0(μm), 50(mm) | 100 |
| 11207131 | 1.0(μm), 60(mm) | 50 |
| 11207132 | 1.0(μm), 90(mm) | 50 |
| 11207135 | 1.0(μm), 142(mm) | 50 |
| 11207139 | 1.0(μm), 293(mm) | 50 |
| 11207140 | 5.0(μm), 13(mm) | 400 |
| 11207141 | 5.0(μm), 25(mm) | 200 |
| 11207142 | 5.0(μm), 47(mm) | 100 |
| 11207143 | 5.0(μm), 50(mm) | 100 |
| 11207144 | 5.0(μm), 60(mm) | 50 |
| 11207145 | 5.0(μm), 90(mm) | 50 |
| 11207148 | 5.0(μm), 142(mm) | 50 |
| 11207152 | 5.0(μm), 293(mm) | 50 |
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