Knowde Enhanced TDS
Identification & Functionality
- Core Type
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Weight Savings
When building composite sandwich components, lightweight ROHACELL® A has a closed cell structure that ensures the resin stays exactly where you want it – in the interface. This eliminates excess and unnecessary resin that adds undesirable weight to the finished part.
- Thermoforming and Shaping
ROHACELL® A can be easily thermoformed or CNC machined to meet customer requirements. High precision, pre-shaped and ready-to-use foam cores in complex or simple geometries can also be supplied by the ROHACELL® Shapes Department.
Applications & Uses
- Markets
- Composites End Use
- Composites Processing Methods
- Structural Foam for Aircraft Application
ROHACELL® A is closed-cell rigid foam based on polymethacrylimide (PMI) chemistry that is completely free of CFC’s and engineered to meet the demanding requirements of the aerospace industry.
Stringent quality control supported by extensive testing documentation of ROHACELL® A has led to specification by major aircraft manufacturers for more than 40 years, including MIL, CMS and others.
- Processing and Production
ROHACELL® A foam is suitable for both prepreg processing and vacuum infusion at temperatures up to 130 °C (266 °F) and pressures up to 0.3 MPa (45 psi).
Curing method options include autoclave, vacuum bagged, RTM, VARTM and press.
Using a ROHACELL® core makes it possible to produce sandwich components in a single step (co-curing), resulting in reduced overall production time.
Properties
- Typical Properties
- Dielectric Properties
- Note
* Thickness tolerance +/- 0.2 mm, other tolerances available on request. 1-4 mm thick sheets supplied in ¼ or ½ sheet size.
| Value | Units | Test Method / Conditions | |
| Density | 32 - 75 | kg/m³ | ISO 845 |
| Compressive Strength | 0.4 - 1.5 | MPa | ISO 844 |
| Tensile Strength | 1 - 2.8 | MPa | ISO 527-2 |
| Tensile Modulus | 36 - 92 | MPa | ISO 527-2 |
| Elongation (at Break) | 3.0 | % | ISO 527-2 |
| Shear Strength | 0.4 - 1.3 | MPa | DIN 53294 |
| Shear Modulus | 13 - 29 | MPa | DIN 53294 |
| Coefficient of Thermal Expansion | 3.52 - 3.70 | 1/K × 10⁻⁵ | — |
| Standard Sheet Thickness (2500 X 1250 mm)* | 1 - 138 | mm | — |
| Value | Units | Test Method / Conditions | |
| Ɛ’ (f = 2.5 Ghz) | 1.05 - 1.08 | — | — |
| tan δ (f = 2.5 Ghz) | 0.0003 | — | — |
| Ɛ’ (f = 5 Ghz) | 1.06 - 1.1 | — | — |
| tan δ (f = 5 Ghz) | 0.0006 - 0.0011 | — | — |
| Ɛ’ (f = 10 Ghz) | 1.05 - 1.12 | — | — |
| tan δ (f = 10 Ghz) | 0.0017 - 0.0046 | — | — |
| Ɛ’ (f = 26.5 Ghz) | 1.05 - 1.08 | — | — |
| tan δ (f = 26.5 Ghz) | 0.0034 - 0.0044 | — | — |