HyPUR-cel® V0550
HyPUR-cel® V0550 is a viscoelastic open cell polyurethane foam with a typical density of 5 pcf and an Indentation Force Deflection of 50 lbs at 25% per ASTM D3574. The material delivers very low resilience of 5.5% and exceptionally low compression set across a service temperature range of -40°F to 250°F. As the firmest grade in the V-series, V0550 is thermoformable and engineered for body-contact and impact protection applications requiring the highest load resistance within the viscoelastic range.
Key Properties
- IFD 25%: 50 lbs (40 – 60 lbs tolerance) per ASTM D3574
- Tensile Strength: 48 psi per ASTM D3574
- Elongation: 215% per ASTM D3574
- Compression Set, 50%: 0.5% (3% max) per ASTM D1056
- Density: 5 pcf (4 – 7 pcf tolerance) per ASTM D3574
- Service Temperature: -40°F to 250°F
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Density | 5 pcf (4 – 7 pcf tolerance) | ASTM D3574 |
Mechanical Properties
| Property | Value | Test Method |
| IFD 25% | 50 lbs (40 – 60 lbs tolerance) | ASTM D3574 |
| 25% CFD | 0.8 psi | ASTM D3574 |
| Tensile Strength | 48 psi | ASTM D3574 |
| Elongation | 215% | ASTM D3574 |
| Tear Strength | 8.4 lb./in | ASTM D624 |
| Compression Set 50% | 0.5% (3% max) | ASTM D1056 |
| Compression Set 50% | 1.2% (5% max) | ASTM D3574 |
| Resilience | 5.5% | ASTM D2632 |
Thermal Properties
| Property | Value | Test Method |
| Service Temperature | -40°F to 250°F | — |
- Body-contact cushioning and pressure management components
- Automotive seating comfort layers and headrests
- Medical device padding and patient positioning aids
- Impact protection and energy absorbing assemblies
- Thermoformed contoured cushion and ergonomic padding
Common industries: Automotive, Medical, Protective Equipment, Ergonomic Products, Consumer Goods.
HyPUR-cel® V0550 is the firmest grade in H-O Products Corporation’s V-series of viscoelastic open cell polyurethane foams. As a viscoelastic material, it combines the conformability of open cell foam with slow-recovery characteristics that distribute load and absorb energy. V0550 is engineered specifically for demanding body-contact and impact protection applications where the highest load resistance within the viscoelastic range is required, while maintaining the breathable open cell structure that allows air and moisture passage.
The foam exhibits exceptionally low compression set — 0.5% per ASTM D1056 and 1.2% per ASTM D3574 at 50% deflection — supporting long-term shape retention in cushioning applications. With 215% elongation and a tear strength of 8.4 lb./in, the material provides the stretch and durability needed to conform over complex geometries without splitting or tearing.
V0550 is thermoformable for custom contoured part production and remains dimensionally stable across its full service temperature range of -40°F to 250°F. The very low resilience of 5.5% per ASTM D2632 is what defines its viscoelastic behavior and impact-damping performance.
What differentiates V0550 from softer grades in the HyPUR-cel® V-series?
V0550 is the firmest grade in the V-series, delivering an IFD of 50 lbs at 25% deflection — the highest load resistance available within the viscoelastic range. This makes it the preferred choice when applications demand both viscoelastic energy absorption and substantial structural support, rather than the deeper conformability offered by softer V-series grades.
Why is compression set critical for V0550?
Compression set measures a foam's ability to recover after sustained loading. V0550's exceptionally low values — 0.5% per ASTM D1056 and 1.2% per ASTM D3574 at 50% deflection — mean the foam retains its original thickness and cushioning performance over the long service life typical of seating, medical positioning, and protective padding applications. High compression set would result in permanent thinning and loss of pressure management capability.
What is the service temperature range for V0550?
The service temperature range for HyPUR-cel® V0550 is -40°F to 250°F.
Is V0550 suitable for automotive and medical applications?
V0550 is engineered for automotive seating comfort layers, headrests, medical device padding, and patient positioning aids as identified in the product's typical applications. No specific regulatory compliance standards are stated on the manufacturer's TDS — end users should confirm certification requirements against their application specification.
How should V0550 be specified?
Specify grade (HyPUR-cel® V0550), thickness, compliance requirements, dimensional tolerances, and finished format (sheet, die-cut, thermoformed, or laminated construction).
