Introduction

Our medical polymer sintered filter elements are manufactured from virgin medical-grade PE, PP, UHMWPE and PTFE raw materials through high-temperature compression sintering. Unlike traditional woven filter cloth and membrane filters, they form an integrated three-dimensional interconnected microporous structure without binders, delivering consistent, reliable filtration performance for medical devices, biopharma, clinical diagnostics and laboratory systems.

All products are produced in cleanroom conditions and comply with mainstream medical material standards, including ISO 10993 biocompatibility test, USP Class VI, ISO13485 and FDA food/medical contact requirements. Zero fiber shedding, low extractables and excellent chemical stability make them a preferred porous filter component for critical medical fluid and gas control applications.

How It Works

Polymer powder is pressed and sintered under controlled heat and pressure. Particles fuse together to create uniform, adjustable pores ranging from 0.1μm to 100μm. This solid porous body allows gas or liquid to pass through while trapping particulates, bacteria and contaminants above the rated pore size. A special self-sealing version is available: normally breathable, it instantly blocks airflow once in contact with liquid, preventing backflow, overflow and cross-contamination in negative-pressure medical circuits.

Core Advantages

✅ Medical Safety & Biocompatibility Made of pure virgin resin, no plasticizer, no additives. Pass cytotoxicity, skin sensitization and hemolysis tests, safe for contact with body fluids, pharmaceutical liquids and respiratory gas pathways.

✅ No Fiber Shedding Integral sintered structure, no loose fibers falling off. Avoid sample pollution and pipeline blockage, critical for diagnostic, cell culture and sterile drug filtration.

✅ Wide Chemical Compatibility Resistant to most weak acids, weak alkalis, alcohol and common pharmaceutical solvents. Stable performance during repeated sterilization cycles (121°C steam, EO sterilization).

✅ Adjustable Pore Size & High Mechanical Strength Pore size, porosity and thickness customizable. Hard, rigid filter body resists deformation under differential pressure, suitable for long-running continuous filtration.

✅ Self-Sealing Optional Function Hydrophobic self-sealing sintered filters stop liquid overflow automatically, widely used for waste liquid bottles, suction devices and humidifier vent protection.

✅ Rich Shape Options & Full Customization Available as filter disc, filter rod, filter tube, filter cartridge, filter sheet and special-shaped parts. We support OEM & ODM according to customer drawings, samples and equipment assembly requirements.

Typical Applications

• Medical device vent & overflow protection: suction machine waste canister, humidifier, negative pressure drainage bag

• Oxygen concentrator, nebulizer and respiratory equipment: air filtration, noise reduction, flow stabilization

• Biopharmaceutical filtration: purified water, infusion liquid, fermentation broth clarification, pre-filtration before sterile filters

• In vitro diagnostic & laboratory instruments: pipette tip filters, sample protection, air barrier

• Medical water system, lab reagent filtration, sterile exhaust filtration

Technical Specifications

• Material: Medical PE / PP / UHMWPE / PTFE

• Pore Size: 0.1μm ~ 100μm

• Porosity: 30% – 45% (adjustable)

• Max Working Temp: 80℃ (PE/PP); up to 260℃ (PTFE)

• Sterilization Method: Steam autoclave, EO, gamma irradiation

• Shape: Disc, cylinder, rod, sheet, custom profile

• Certification: ISO13485, ISO10993, USP Class VI, RoHS, REACH

FAQ

Q1: Are sintered polymer filters reusable? A: Standard medical versions are mostly single-use for sterile scenarios. Some large-size PP/PE sintered cartridges can be cleaned and reused for non-clinical pre-filtration after validation.

Q2: What is the difference between sintered PE filter and PES membrane filter? A: Sintered polymer filters are rigid, anti-shedding, pressure-resistant and good for venting / overflow stop; membrane filters deliver higher precision sterile filtration but are fragile and easy to break under pressure. They are often used together in one system.

Q3: Can you produce self-sealing sintered filters? A: Yes. Our self-sealing sintered PE filters are designed for liquid backflow prevention, a mature part for suction and waste collection medical modules.

Q4: What is the MOQ for custom sintered filter parts? A: We accept sample trial orders and small batch customization. Contact our sales team with drawings, target pore size and dimension requirements for quotation.

Get Custom Solutions

If you need sintered polymer filters for medical equipment, biotech or diagnostic projects, send us your drawing, sample or technical datasheet. Our engineering team will support material selection, pore optimization and prototype testing.