HPP-PP Polypropylene Depth Filter Cartridge by NeuronBC

Overview

The HPP-PP Polypropylene Depth Filter Cartridge is a high-integrity, thermally stable, and chemically inert filtration solution engineered for critical bioprocessing applications in upstream and downstream operations. Designed using asymmetric depth filtration principles, the cartridge employs a gradient-density matrix of US-sourced polypropylene melt-blown microfiber media—structured to provide progressive particle retention from coarse surface capture to fine sub-surface entrapment. This architecture minimizes premature blinding while maintaining consistent flow dynamics and high contaminant loading capacity. Unlike surface-type membrane filters, the HPP-PP leverages tortuous path geometry and adsorptive interaction within its 100% polypropylene matrix to achieve robust particulate, microbial, and colloidal removal without shedding or extractables. Its fully thermoplastic construction enables repeatable sterilization via steam-in-place (SIP) at 121 °C for 30 minutes, meeting ASME BPE 2023 requirements for single-use and reusable bioprocess systems.

Key Features

• Full polypropylene construction—no adhesives, no binders, no metal components—ensuring zero leachables and full compatibility with aggressive CIP agents (e.g., 0.5 M NaOH, 2% citric acid, 30% IPA)
• Thermally bonded end caps and thermal fusion sealing eliminate gasket failure risks and support pressure integrity up to 0.42 MPa forward differential pressure at 25 °C
• Broad chemical resistance across pH 1–14, enabling use in acidic harvest buffers, alkaline cleaning solutions, and organic solvent rinses
• Validated thermal stability: continuous operation at ≤80 °C; repeated SIP cycles (≥5×) at 121 °C/30 min without structural degradation or performance drift
• Low ΔP design: typical pressure drop <0.08 MPa at 100 L/m²/h (for 0.22 µm rating), supporting energy-efficient large-volume processing
• Manufactured under controlled cleanroom conditions (ISO Class 7) with full traceability documentation including lot-specific integrity test reports (forward flow & water intrusion)

Sample Compatibility & Compliance

The HPP-PP cartridge is qualified for use with mammalian cell culture harvests, monoclonal antibody (mAb) purification streams, viral vector intermediates, vaccine bulk solutions, and sterile-grade buffer preparations. It complies with material safety requirements per FDA 21 CFR §177.1520 for polypropylene food-contact polymers and meets USP elemental impurity limits. All raw materials are certified non-pyrogenic (<0.25 EU/mL) and subjected to extractables profiling per USP and . The cartridge supports GLP/GMP-aligned validation protocols—including pre-use integrity testing, post-sterilization bubble point verification, and end-of-life challenge studies per ASTM F838-22 (B. diminuta) and ASTM F795-23 (S. marcescens). Documentation packages include Certificate of Conformance, Biocompatibility Summary (ISO 10993-5/-10), and Regulatory Support File (RSF) for regulatory submissions.

Software & Data Management

While the HPP-PP is a passive, hardware-only filtration component, it integrates seamlessly into digitally monitored bioprocess trains. When deployed in conjunction with validated process skids (e.g., ÄKTA, Sartorius BPS, Pall Allegro), the cartridge’s performance metrics—including real-time ΔP trends, cumulative throughput, and integrity test logs—are captured via OPC UA or Modbus TCP interfaces. All batch records generated during SIP, CIP, and filtration runs are stored with electronic audit trails compliant with 21 CFR Part 11 requirements. NeuronBC provides optional digital twin mapping support for predictive lifetime modeling based on historical pressure decay curves and feed stream turbidity profiles.

Applications

• Prefiltration of clarified cell culture fluid prior to protein A chromatography
• Final sterile filtration of therapeutic proteins, vaccines, and gene therapy vectors (when paired with 0.22 µm rating)
• Clarification of fermentation broths containing shear-sensitive enzymes or inclusion bodies
• In-line polishing of process buffers and media components in continuous manufacturing platforms
• CIP rinse water recovery loops requiring particulate removal without introducing metallic ions or silicone residues
• Single-use bioreactor harvest lines where extractables control is mandated by ICH Q5C and Q5D guidelines

FAQ

Can the HPP-PP cartridge be reused after steam sterilization?
Yes—validated for ≥5 consecutive SIP cycles at 121 °C for 30 minutes when operated within specified pressure and temperature limits.
Is integrity testing required before each use?
Yes. Forward flow and water intrusion tests must be performed per ASTM F3154-18 and documented as part of batch release criteria.
Does the cartridge support gamma irradiation?
No. Gamma exposure degrades polypropylene crystallinity and compromises mechanical integrity; only steam and hot water sanitization are approved.
What is the maximum allowable flow rate for the 0.22 µm variant?
Maximum recommended flux is 100 L/m²/h at 25 °C; higher rates may reduce particle retention efficiency and increase risk of fiber migration.
Are custom lengths or diameters available?
Yes—NeuronBC offers OEM configuration options including 10″, 20″, and 30″ lengths, as well as sanitary clamp (Tri-Clamp®) and flange-end configurations upon request.