Product Overview
UL-94 45 PPI Reticulated Foam — Technical Overview & FAQs
Product Overview
UL-94 45 PPI Reticulated Foam is an open-cell, flame-retardant polyurethane foam engineered for acoustic absorption, air filtration, and vibration damping in demanding environments.
With 45 pores per inch (PPI), this foam achieves a fine, consistent cell structure ideal for precise air and sound management.
This material is PVC-coated for enhanced chemical resistance, dimensional stability, and extended life in applications requiring fire safety and high airflow.
It meets UL 94 HF-1 flammability rating, ensuring low flame spread and self-extinguishing performance.
Applications
Acoustic panels and sound baffles
HVAC and electronic enclosure filtration
Automotive and transportation air filters
EMI/thermal shielding padding or vibration dampers
Aerospace and appliance insulation requiring UL 94 HF-1 compliance
Key Properties
Base Polymer: Polyether Urethane Foam, PVC-coated
Pore Density: 45 PPI (fine open-cell structure)
Flame Rating: UL 94 HF-1 (self-extinguishing)
Density: ~2.2 lb/ft³ (ASTM D3574)
Tensile Strength: ~25 psi (ASTM D3574)
Elongation at Break: ~100% (ASTM D3574)
Compression Deflection (25%): 1.0–2.0 psi (ASTM D3574)
Operating Temperature Range: –40 °F to +200 °F (–40 °C to +93 °C)
Airflow: 300–350 cfm/in² @ 0.5 in H₂O
Color: Black
Structure: Open-cell reticulated with PVC surface coating
Compliance: UL 94 HF-1 | RoHS | REACH
FAQs
What is UL-94 45 PPI Reticulated Foam used for?
It’s used for sound attenuation, dust filtration, and vibration control in enclosures, HVAC systems, and electronics requiring UL 94 HF-1 fire safety certification.
What does 45 PPI mean?
PPI stands for pores per inch. A higher PPI value (like 45) indicates finer cells, allowing better acoustic absorption and filtration precision compared to coarse foams.
What makes this foam UL 94 HF-1 rated?
The foam’s PVC coating and formulation meet the UL 94 HF-1 standard, meaning it is self-extinguishing and demonstrates low flame propagation in horizontal burn tests.
Is it resistant to moisture and chemicals?
Yes — the PVC coating provides enhanced resistance to moisture, oils, and light solvents, improving service life and dimensional stability.
Can it be die-cut or fabricated to custom shapes?
Yes — H-O Products offers custom die-cut, laminated, and fabricated shapes for air, sound, or sealing applications across multiple industries.
Contact H-O Products for UL-94 45 PPI Reticulated Foam samples, technical data sheets, or custom-fabricated filtration and acoustic solutions tailored to your system’s design requirements - contact us.
Learn more about choosing the right reticulated polyether foam for your application in our blog.
