MATERIALS, ADHESIVES AND COATINGS
Hyfonic™ hydrolysis-resistant flame-retardant sound-absorbing polyether foam, UL 94 HF-1, FAR 25.853
Country: USA · Model: Hyfonic
Acoustic polyether foam with modified flammability, resistant to hydrolysis in a hot humid environment. Density 1.7 lb/ft³ (about 27 kg/m³), NRC 0.45, SAA 0.50, thermal conductivity 0.04423 W/(m·K), so it is used as both sound and thermal insulation. Complies with UL 94 HF-1, FMVSS 302 and FAR 25.853.
- Material
- flexible polyether-based polyurethane foam, modified for flammability
- Density
- 1.7 lb/ft³ (≈27 kg/m³)
- Pore size
- 65 ppi (not per the ASTM method)
- Tensile strength
- 14 psi (12 psi after activation)
Technical specifications
| Material | flexible polyether-based polyurethane foam, modified for flammability |
|---|---|
| Density | 1.7 lb/ft³ (≈27 kg/m³) |
| Pore size | 65 ppi (not per the ASTM method) |
| Tensile strength | 14 psi (12 psi after activation) |
| Indentation IFD 25 % / 65 % | 0.5 / 0.7 psi |
| NRC / SAA | 0.45 / 0.50 |
| Thermal resistance R | 0.574 m²·K/W |
| Thermal conductivity | 0.04423 W/(m·K) |
| Temperature range | short-term up to 250 °F (121 °C); no cracking at −40 °F (−40 °C) |
| Fire safety | UL 94 HF-1; FAR 25.853 App. F Part I (a)(1)(i), (a)(1)(ii); FMVSS 302 (DOT MVSS 302) |
| Test methods | ASTM D3574, ASTM C423 |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The main difference from ordinary polyester-based acoustic foams is resistance to hydrolytic degradation, so the material does not lose strength and structure under prolonged exposure to a hot humid environment. The foam withstands brief heating to 250 °F (121 °C), and at −40 °F (−40 °C) it does not crack when bent on a mandrel whose diameter equals the sample thickness. Per ASTM D3574 and ASTM C423 the pore size is 65 ppi (determined not per the ASTM method), tensile strength 14 psi (12 psi after activation), and indentation force IFD 0.5 psi at 25 % and 0.7 psi at 65 % deformation. Thermal resistance R is 0.574 m²·K/W. The manufacturer rates die-cutting suitability as fair or good. The foam is formed, laminated and supplied in sheets and die-cut parts.
How to choose
Hyfonic™ is taken when the sound-absorbing material works in heat and humidity and hydrolysis resistance is needed. Burning requirements are covered by UL 94 HF-1, the US automotive standard FMVSS 302 and FAR 25.853, Appendix F, Part I, paragraphs (a)(1)(i) and (a)(1)(ii). If a denser foam for vibration damping is needed, look at AEROFONIC® with a density of 5.4 lb/ft³.
Request a price and lead time
Hyfonic™ hydrolysis-resistant flame-retardant sound-absorbing polyether foam, UL 94 HF-1, FAR 25.853. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How does Hyfonic differ from ordinary acoustic foams?
It is made on polyether, so it is resistant to hydrolytic degradation and does not lose strength in a hot humid environment.
What are the acoustic and thermal parameters of Hyfonic?
NRC 0.45, SAA 0.50, thermal resistance R 0.574 m²·K/W and thermal conductivity 0.04423 W/(m·K). Therefore the foam can be used as both sound and thermal insulation.
What temperature does Hyfonic withstand?
Briefly up to 250 °F (121 °C). At −40 °F (−40 °C) it does not crack when bent on a mandrel whose diameter equals the thickness.
Which burning standards does Hyfonic meet?
UL 94 HF-1, FMVSS 302 and FAR 25.853, Appendix F, Part I, paragraphs (a)(1)(i) and (a)(1)(ii).
Where is Hyfonic used?
In the aerospace industry, enclosures of industrial equipment, interiors of class 8 long-haul truck cabs, enclosures of medical equipment for home use and other noise insulation assemblies.
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