45 PPI Acrylic Coated Reticulated Foam
45 PPI UV-Resistant Acrylic Coated Open Cell Reticulated Polyether Polyurethane Foam
H-O Products 45 PPI Acrylic Coated Reticulated Foam is a compressible open cell polyether polyurethane foam with a nominal cell count of 45 ppi ±5 (CREST), a density of 1.4 lb/ft³ ±0.10, and a volumetric air flow rate of 12.5 cfm ±2 per ASTM D3574-91. The acrylic coating provides UV resistance rated Excellent at 252 hours per ASTM G154. It is the finest-pore fully specified grade in the acrylic coated reticulated foam series and is an economical alternative to PVC coating for applications not exposed to harsh climate conditions.
Key Properties
- Compression Force Deflection @ 25%: 0.65 psi ±0.10 (ASTM D3574-91)
- Compression Set @ 50% Deflection: 25% loss maximum (ASTM D3574-91)
- Tensile Strength: 22 lb/in minimum (ASTM D3574-91)
- Elongation @ Break: 200% minimum (ASTM D3574-91)
- Density: 1.4 lb/ft³ ±0.10 (ASTM D3574-91)
- UV Resistance, 252 Hours: Excellent (ASTM G154)
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Thickness | 1/4″, 3/8″, 5/8″, 1/2″, 3/4″, 7/8″, 1″ | — |
| Material/Substrate | Polyether Polyurethane Foam | — |
| Color | Black | — |
| Cell Structure | Open Cell | — |
| Cell Count | 45 ppi ±5 | CREST |
| Foam Grade | S-45 | CREST |
| Density | 1.4 lb/ft³ ±0.10 | ASTM D3574-91 |
Mechanical Properties
| Property | Value | Test Method |
| Compression Force Deflection @ 25% | 0.65 psi ±0.10 | ASTM D3574-91 |
| Compression Set @ 50% Deflection | 25% loss maximum | ASTM D3574-91 |
| Tensile Strength | 22 lb/in minimum | ASTM D3574-91 |
| Elongation @ Break | 200% minimum | ASTM D3574-91 |
| Tear Strength | 4.5 lb/in minimum | ASTM D3574-91 |
Acoustic / Air Flow
| Property | Value | Test Method |
| Volumetric Air Flow Rate | 12.5 cfm ±2 | ASTM D3574-91 |
| Air Pressure Drop | 0.15 ±0.05 | ASTM D3574-91 |
Flame & Fire Performance
| Property | Value | Test Method |
| Flame Retardant | Flame retardant available by special request. | — |
Environmental Performance
| Property | Value | Test Method |
| UV Resistance, 252 Hours | Excellent | ASTM G154 |
Aging Performance
Dry Heat Aging
| Property | Value | Test Method |
| Tensile Strength Dry Heat Loss | 20% maximum | ASTM D3574-91 |
Autoclave Aging
| Property | Value | Test Method |
| Compression Set @ 50% Deflection Autoclave Loss | 25% maximum | ASTM 3574-91 |
| 25% Compression Load Deflection Autoclave Loss | 15% maximum | ASTM D3574-91 |
- Air conditioner filter media requiring fine 45 PPI pore filtration with UV resistance for outdoor or exposed installations
- Weep baffling in commercial and residential construction where fine particulate filtration and UV resistance are required in applications not subject to harsh weather conditions
- General filtering applications inside and outside buildings requiring fine 45 PPI pore filtration with UV stability
- NEMA enclosure and generator or compressor housing ventilation requiring fine 45 PPI filtration and UV resistance
- Moisture and air infiltration barriers in building envelope assemblies requiring finer filtration than the 30 PPI acrylic grade with UV stability for sunlight-exposed installations
Common industries: construction, HVAC, fenestration, electrical enclosures, industrial equipment.
The 45 PPI Acrylic Coated Reticulated Foam is the finest-pore fully specified grade in H-O Products’ acrylic coated reticulated foam series, with a nominal cell count of 45 ppi and a volumetric air flow rate of 12.5 cfm ±2. Foam Grade S-45 per CREST.
The acrylic coating provides UV resistance in black and is an economical alternative to PVC coating for applications not exposed directly to harsh climate conditions such as driving rain, dust storms, or hail storms. It is designed for air conditioner filters, general filtering applications, and weep baffling in commercial and residential construction.
Per the TDS note, the Crest visual PPI standard is the industry accepted nomenclature for defining reticulated foam pore size; however, the air flow is the only quantifiable value for determining PPI for published specifications, and the only exception allowed is if visual PPI is agreed as a standard in advance prior to order submission.
Compression force deflection at 25% is 0.65 psi ±0.10 — the highest in the acrylic coated series with full ASTM D3574-91 data. Compression set at 50% deflection is 25% loss maximum. Tensile strength is 22 lb/in minimum with a dry heat loss maximum of 20%. Elongation at break is 200% minimum — the highest in the series. Tear strength is 4.5 lb/in minimum. Air pressure drop is 0.15 ±0.05 per ASTM D3574-91.
Autoclave compression set loss is 25% maximum and 25% compression load deflection autoclave loss is 15% maximum. Flame retardant is available by special request.
What differentiates the 45 PPI Acrylic Coated grade from the 30 PPI acrylic grade and the 60 PPI and 80 PPI acrylic grades?
The 45 PPI grade is the finest-pore fully specified grade in the acrylic coated series, with a volumetric air flow of 12.5 cfm ±2, foam grade S-45 (using the "S" prefix), and a full ASTM D3574-91 property set including compression set, autoclave aging, tear strength, and air pressure drop data. It has the highest CFD (0.65 psi ±0.10) and highest elongation (200% minimum) among the fully specified acrylic grades. The 60 PPI and 80 PPI acrylic grades are specified to ASTM D3574 without the -91 suffix and provide a reduced property set.
Why is compression force deflection important for an acrylic coated reticulated foam?
Compression force deflection determines how readily the foam compresses to fill a cavity under installation force. The 45 PPI acrylic coated grade has a CFD of 0.65 psi ±0.10 at 25% — the highest in the acrylic coated series with full ASTM D3574-91 data — reflecting its fine, dense skeletal structure. This moderately higher resistance should be accounted for during installation in tight-tolerance enclosures and filter frames where the foam must seat firmly and maintain consistent filtration contact.
What is the service temperature range for the 45 PPI Acrylic Coated Reticulated Foam?
A specific service temperature range is not stated on the manufacturer's TDS for this material. Aging performance data includes tensile strength dry heat loss of 20% maximum per ASTM D3574-91 and autoclave aging performance per ASTM 3574-91 and ASTM D3574-91.
Is the 45 PPI Acrylic Coated Reticulated Foam suitable for regulated environments?
No compliance standards are specified on the manufacturer's TDS for this material. A flame retardant formulation is available by special request. The TDS notes that the acrylic coating is suitable as an economical alternative to PVC when the foam is not exposed directly to harsh climate conditions such as driving rain, dust storms, or hail storms.
How should the 45 PPI Acrylic Coated Reticulated Foam be specified?
Specify grade (45 PPI Acrylic Coated Reticulated Foam, Foam Grade S-45), thickness, color (Black), compliance requirements if applicable, dimensional tolerances, and finished format. Per the TDS, air flow is the only quantifiable value for determining PPI for published specifications.
