UL-94 30 PPI Reticulated Foam — Technical Overview & FAQs

Product Overview

UL-94 30 PPI Reticulated Foam is a fine open-cell polyurethane foam designed for applications requiring enhanced filtration efficiency, smooth airflow control, and superior flame resistance.
With 30 pores-per-inch (PPI), this foam provides a tighter, more refined cell structure ideal for capturing finer particulates while still maintaining excellent airflow.

This foam meets the UL 94 HF-1 flame rating, making it a self-extinguishing, low flame spread material suitable for electronics, HVAC, appliances, and industrial systems requiring certified fire performance.
Its reticulated architecture also offers acoustic absorption, lightweight cushioning, and flexible fabrication options.

Applications

Medium-fine HVAC and appliance filtration
Electronic enclosures and cooling systems
Automotive & small engine intake filters
Acoustic absorption and sound buffering
Office equipment, racks, and cabinets
Industrial blowers, fans, and compressor inlets

Key Properties

Base Material: Reticulated polyether polyurethane foam
Pore Density: 30 PPI (fine open-cell structure)
Flame Rating: UL 94 HF-1 (self-extinguishing)
Density: ~1.8–2.3 lb/ft³
Airflow Performance: Controlled airflow with finer particulate capture
Tensile Strength: ~20–30 psi
Elongation at Break: 90–120%
Compression Deflection (25%): 0.8–1.8 psi
Operating Temperature Range: –40 °F to +200 °F (–40 °C to +93 °C)

Color: Black or charcoal

Structure: 100% reticulated open-cell polyurethane network

Compliance: UL 94 HF-1 | RoHS | REACH

FAQs

What is UL-94 30 PPI Reticulated Foam used for?

It is used for medium-to-fine air filtration, airflow control, acoustic absorption, and dust screening in HVAC, electronics, appliances, and industrial equipment requiring UL 94 HF-1-certified flame resistance.

What does 30 PPI mean?

PPI means pores per inch.
30 PPI foam is finer than 10 or 20 PPI, offering better filtration efficiency while still maintaining good airflow through its open-cell structure.

Is this foam flame retardant?

Yes — it meets the UL 94 HF-1 flame rating, making it self-extinguishing and suitable for electronic and appliance applications that require proven fire safety.

Can 30 PPI reticulated foam be die-cut or customized?

Yes — H-O Products can fabricate die-cut shapes, rolls, pads, PSA-backed sheets, or custom assemblies to fit your airflow, filtration, or acoustic requirements.

How well does this foam perform in humid environments?

Polyether reticulated foam offers excellent humidity resistance, quick drying, and long-term performance even when exposed to moisture or continuous airflow.

Contact H-O Products to request UL-94 30 PPI Reticulated Foam samples, technical data sheets, or custom-fabricated filtration and acoustic solutions designed to match your system’s performance needs - contact us.

Learn more about choosing the right reticulated polyether foam for your application in our blog.