Foam, sandwich panels, PET, composite panels, insulation panels
PMI (polymethacrylimide) is a foam developed specifically for use as a structural core in connection with vacuum infusion processes. It is applied in components for various sectors including aerospace and sports equipment with resin injection to reduce weight.
The PMI core allows sandwich panels to be produced in a single step (co-polymerisation), resulting in shorter overall production times. It is highly suitable for autoclave technologies and vacuum infusion processes, including RTM (resin transfer moulding) and VARTM (vacuum resin transfer moulding).
The cells of this foam have particularly small diameters in relation to other structural foams. This material achieves an optimal compromise between low resin absorption and satisfactory adhesion of the skins to the core.
Technical features
Processing and production
PMI is particularly suitable for vacuum infusion and RTM processes due to its optimised cell structure, where it can be used at temperatures up to 180°C with pressure up to 0.7 MPa after heat treatment.
Thermoforming and shaping
PMI can be easily thermoformed or CNC machined as required with significant production advantages. We supply high-precision, pre-formed and ready-to-use cores in complex or simple geometries.
Creep deformation test conditions
PMI 24 130 °C/0.1MPa/2h
PMI 30 130 °C/0.1MPa/2h
PMI 50 130 °C/0.3MPa/2h
PMI 75 150 °C/0.3MPa/2h
PMI 110 180 °C/0.3MPa/2h
Note: the technical data of our products are typical values for the nominal density
Applications
Technical datasheet
| Type | Test Method |
Units | PMI 24 | PMI 30 | PMI 50 | PMI 75 | PMI 110 | PMI 200 |
Density |
ISO845 |
kg/m³ |
24±3 |
30±3 |
30±3 | 75±7 | 110±10 | 200±15 |
Compressive
|
ISO844 |
MPa |
0.25 |
0.40 |
0.85 | 1.70 | 3.60 | 9.50 |
| Tensile Strength |
ASTM D638 |
MPa | 0.6 | 0.80 | 1.68 | 2.30 | 3.70 | 7.00 |
Elastic
|
ASTM
|
MPa |
25 |
38 |
83 | 108 | 197 | 380 |
Elongation
|
ASTM
|
% |
2.8 |
2.4 |
2.6 | 2.8 | 2.8 | 3.0 |
Flexural
|
ASTM
|
MPa |
0.4 |
0.80 |
1.60 | 2.90 | 5.20 | 13.0 |
Shear
|
ASTM
|
MPa |
0.3 |
0.40 |
0.85 | 1.25 | 2.38 | 5.00 |
Shear Modulus |
ASTM
|
MPa |
12 |
15 |
30 | 48 | 80 | 160 |
Compressive
|
GB/T
|
% |
>=2.0 |
/ | ||||
Temperature
|
DIN
|
°C |
>=200 |
|||||
Compressive creep testing conditions:
PMI 24 130 °C/0.1MPa/2h
PMI 30 130 °C/0.1MPa/2h
PMI 50 130 °C/0.3MPa/2h
PMI 75 150 °C/0.3MPa/2h
PMI 110 180 °C/0.3MPa/2h
Note: Technical data of our products are typical values for the nominal density.
| PMI | Size (mm) | Standard Thickness Range (mm) | Thickness Tolerance (mm) |
24 |
2500x1250 |
1-60 |
±0.2 |
30 |
2500x1250 |
1-60 |
±0.2 |
| 50 | 2500x1250 | 1-120 | ±0.2 |
75 |
2500x1250 |
1-100 |
±0.2 |
110 |
2160x1100 |
1-90 |
±0.2 |
Note: 1-4mm thick sheet is supplied in 1/4 or 1/2 sheet size.
All heat-treated sheets supplied in sealed aluminum packaging.
LIABILITY DISCLAIMER: The above data are to the best of our knowledge correct and are intended to give information about our products and their potential applications. No warranty is given or implied in respect of certain properties of the products or their suitability for a particular application. We reserve the right for technical changes without further notice. We guarantee impeccable product quality under our terms of sale.
IMPORTANT
To allow us to offer you a panel with particular finishes or colors without minimal pigment variations, it is recommended to place an overall order , so that we can plan the production with the rolling mills that will carry out the painting of the sheets in a batch.