Evonik - Polymethacrylimide (PMI) Foam - Core Material

Knowde Enhanced TDS

Identification & Functionality

Features & Benefits

Labeling Claims: Chlorofluorocarbon (CFC)-Free
Materials Features: Good Rigidity,
High Pressure Resistance,
High Temperature Resistance,
Machinable
Thermoforming and Shaping: ROHACELL® XT can be easily thermoformed or CNC machined to meet customer requirements, bringing tremendous manufacturing advantages.

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

Composites Processing Methods: Out of Autoclave Prepreg,
Resin Transfer Molding (RTM),
Thermoforming,
Vacuum Assisted Resin Transfer Molding (VARTM),
Vacuum Infusion Processing (VIP)
For the Most Demanding Process Conditions: ROHACELL® XT is a closed-cell rigid foam based on polymethacrylimide (PMI) chemistry that is completely free of CFC’s and is engineered to meet extreme and demanding processing requirements.
Processing and Production: Of all the ROHACELL® grades, it is the grade that is best suited to withstand the most demanding process conditions: curing temperatures of up to 180 °C (356 °F) and pressures as high as 0.45 MPa (65 psi).

After heat treatment, ROHACELL® XT-HT can even be used at temperatures of 190 °C (374 °F) and pressure of 0.7 MPa (102 psi) dependent upon density. Typical curing temperatures of BMI resin system of up to 210 °C (410 °F) can be applied in a pressureless post-cure process.

These extreme properties make ROHACELL® XT the ideal foam for use with BMI resins, among other materials.

ROHACELL® XT foam is suitable for autoclave technologies, vacuum infusion, RTM and VARTM processes.

Properties

Typical Properties
Note: * Thickness tolerance +/- 0.2 mm, other tolerances available on request. 1-4 mm thick sheets supplied in ¼ or ½ sheet size.