20 PPI Acrylic Coated Reticulated Foam
20 PPI Acrylic Coated Reticulated Foam is a compressible open cell polyether polyurethane foam with a nominal cell count of 20 ppi ±5 (CREST), a density of 1.4 lb/ft³ ±0.10, and a volumetric air flow rate of 22 cfm ±3.5 per ASTM D3574-91. The acrylic coating provides UV resistance rated Excellent at 252 hours per ASTM G154, making this grade suitable for applications with UV exposure where the uncoated grade is not appropriate. It is the mid-pore grade in the acrylic coated reticulated foam series.
Key Properties
- Compression Force Deflection @ 25%: 0.50 psi ±0.10 (ASTM D3574-91)
- Compression Set @ 50% Deflection: 15% loss maximum (ASTM D3574-91)
- Tensile Strength: 18 lb/in minimum (ASTM D3574-91)
- Elongation @ Break: 180% 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″, 1-1/8″, 1-1/4″, 1-3/8″, 1-1/2″, 1-3/4″, 2″ | — |
| Material/Substrate | Polyether Polyurethane Foam | — |
| Color | Black | — |
| Cell Structure | Open Cell | — |
| Cell Count | 20 ppi ±5 | CREST |
| Foam Grade | T-20 | CREST |
| Density | 1.4 lb/ft³ ±0.10 | ASTM D3574-91 |
Mechanical Properties
| Property | Value | Test Method |
| Compression Force Deflection @ 25% | 0.50 psi ±0.10 | ASTM D3574-91 |
| Compression Set @ 50% Deflection | 15% loss maximum | ASTM D3574-91 |
| Tensile Strength | 18 lb/in minimum | ASTM D3574-91 |
| Elongation @ Break | 180% minimum | ASTM D3574-91 |
| Tear Strength | 5 lb/in minimum | ASTM D3574-91 |
Acoustic / Air Flow
| Property | Value | Test Method |
| Volumetric Air Flow Rate | 22 cfm ±3.5 | 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 | 15% maximum | ASTM D3574-91 |
Autoclave Aging
| Property | Value | Test Method |
| Compression Set @ 50% Deflection Autoclave Loss | 10% maximum | ASTM 3574-91 |
| 25% Compression Load Deflection Autoclave Loss | 15% maximum | ASTM D3574-91 |
- Air conditioner filter media requiring mid-pore filtration with UV resistance for outdoor or exposed installations
- Weep baffling in commercial and residential construction where UV resistance is required and the acrylic coating provides an economical alternative to PVC in applications not subject to driving rain, dust storms, or hail
- General filtering applications requiring a balance of air flow and particulate filtration with UV stability
- NEMA enclosure and generator or compressor housing ventilation where moderate air flow and UV-resistant foam are specified
- Moisture and air infiltration barriers in building envelope assemblies where the foam is exposed to sunlight or UV and the uncoated grade is not appropriate
Common industries: construction, HVAC, fenestration, electrical enclosures, industrial equipment.
The 20 PPI Acrylic Coated Reticulated Foam is a mid-pore grade in H-O Products’ acrylic coated reticulated foam series, with a nominal cell count of 20 ppi and a volumetric air flow rate of 22 cfm ±3.5. 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 0.50 psi ±0.10. Compression set at 50% deflection is 15% loss maximum, with the tightest autoclave compression set loss in the series at 10% maximum. Tensile strength is 18 lb/in minimum with a dry heat loss maximum of 15%. Elongation at break is 180% minimum. Tear strength is 5 lb/in minimum. Air pressure drop is 0.15 ±0.05 per ASTM D3574-91. The 25% compression load deflection autoclave loss is 15% maximum. Flame retardant is available by special request.
What differentiates the 20 PPI Acrylic Coated grade from the 20 PPI Uncoated grade and from the other acrylic coated grades?
The acrylic coating adds UV resistance rated Excellent at 252 hours per ASTM G154, making this grade suitable for UV-exposed applications where the uncoated 20 PPI grade cannot be used. The coating is an economical alternative to PVC for conditions that do not include harsh weather. Within the acrylic coated series, the 20 PPI grade is a mid-pore grade with a volumetric air flow of 22 cfm ±3.5 and the tightest autoclave compression set loss at 10% maximum.
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 20 PPI acrylic coated grade has a CFD of 0.50 psi ±0.10 at 25%, providing moderate compression resistance that allows the foam to seat reliably in its cavity while maintaining consistent filtration contact throughout its service life.
What is the service temperature range for the 20 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 15% maximum per ASTM D3574-91 and autoclave aging performance per ASTM 3574-91 and ASTM D3574-91.
Is the 20 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 20 PPI Acrylic Coated Reticulated Foam be specified?
Specify grade (20 PPI Acrylic Coated Reticulated Foam, Foam Grade T-20), 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.
