45 PPI PVC Coated Reticulated Foam
45 PPI PVC Coated Open Cell Reticulated Polyether Polyurethane Foam
H-O Products 45 PPI PVC 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 PVC coating is widely specified by architects for its durability and longevity and this grade is best suited for exposure to harsh climate conditions including driving rain, dust storms, and hail storms. It is a fine-pore grade in the PVC coated reticulated foam series.
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)
- Volumetric Air Flow Rate: 12.5 cfm ±2 (ASTM D3574-91)
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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 | — |
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 |
- Loudspeaker covers requiring fine 45 PPI pore filtration in the PVC coated series with PVC weather durability for harshly exposed installations
- Air conditioner filter media in exterior or harsh-environment installations where PVC coating durability is specified and 45 PPI fine filtration is required
- Weep baffling in commercial and residential construction requiring fine 45 PPI particulate filtration with PVC durability under harsh climate conditions
- NEMA enclosure and generator or compressor housing ventilation where fine 45 PPI pore filtration and long-term PVC weather resistance are specified
- General filtering applications in exterior building assemblies requiring the finest pore structure in the ASTM D3574-91 specified PVC coated series within the 1/4″ to 1″ thickness range
Common industries: construction, HVAC, fenestration, electrical enclosures, industrial equipment, audio.
The 45 PPI PVC Coated Reticulated Foam is a fine-pore grade in H-O Products’ PVC 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 PVC coating provides durability widely specified by architects, and this grade is best for exposure to harsh climate conditions such as driving rain, dust storms, and hail storms.
It is designed for loudspeaker covers, 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. Note: UV resistance data is not listed on the TDS for this grade.
Compression force deflection at 25% is 0.65 psi ±0.10 — the highest in the PVC coated series tested to ASTM D3574-91. 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 ASTM D3574-91 PVC coated 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 PVC Coated grade from the 30 PPI, 60 PPI, and 80 PPI PVC coated grades, and from the 45PPIRETICFPU (UL94 HF-1) grade?
The 45 PPI PVC Coated grade is a fine-pore grade unique to the standard PVC coated series, with foam grade S-45 per CREST, CFD of 0.65 psi ±0.10, and the highest elongation at 200% minimum among the ASTM D3574-91 PVC coated grades. Unlike the 45PPIRETICFPU (UL94 HF-1) grade, this TDS does not list UV resistance data. The 60 PPI grade uses ASTM D3574-05 and has a higher density; the 80 PPI grade has a reduced property set tested to ASTM D3574.
Why is compression force deflection important for a PVC coated reticulated foam?
Compression force deflection determines how readily the foam compresses to fill a cavity under installation force. The 45 PPI PVC coated grade has a CFD of 0.65 psi ±0.10 at 25% — the highest in the PVC coated ASTM D3574-91 series — reflecting its fine, dense skeletal structure. This moderately higher resistance should be accounted for during installation in tight-tolerance loudspeaker covers and filter enclosures.
What is the service temperature range for the 45 PPI PVC 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 PVC 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 PVC coating is described as best for harsh climate conditions. UV resistance data is not listed on the TDS for this grade — the 45PPIRETICFPU grade carries UL94 HF-1 and UV resistance data.
How should the 45 PPI PVC Coated Reticulated Foam be specified?
Specify grade (45 PPI PVC 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.
