Introduction of PMI Polymer Structure Foam


Polymethacrylimide (PMI) foam is a crosslinked rigid st […]

Polymethacrylimide (PMI) foam is a crosslinked rigid structural foam with
100% closed cell structure, its uniformly crosslinked pore wall structure can give it outstanding structural stability and excellent
Mechanical properties. The PMI foam was first invented by Dr. Schrder of Germany in 1961, by the German Rohm
And Hass Co., Ltd. first developed and implemented the product in Darmstadt, Germany in 1966.
Turn. At present, PMI foam has been widely used in aerospace, aviation, military, ship, automobile, railway machines.
Car manufacturing, radar, antennas and other fields.
PMI foam has the following properties:
1, 100% closed-cell structure, and isotropic.
2, good heat resistance, heat distortion temperature is 180 ~ 240 ° C.
3, excellent mechanical properties, high specific strength, high specific modulus, is the highest among all kinds of foam.
4, surface contact, has a good compression creep performance.
5, high temperature autoclave molding (180 ~ 230 ° C, 0.5 ~ 0.7MPa), vacuum package heating molding (180 ~
230 ° C, several Pa), can also be melt-injected to achieve a one-time co-curing of the foam interlayer and prepreg.
6, no fluorine and halogen. Scorpio new material
7, good fire performance, non-toxic, low smoke.
8. Good compatibility with various resin systems.
9. Excellent dielectric properties: dielectric constant 1.05~1.13, loss tangent at (1~18)×10-3.
In the frequency range of 2 to 26 GHz, the changes in dielectric constant and dielectric loss are small and show good
Its wide frequency stability makes it ideal for radar and radome manufacturing.
10. Damp-hot corrosion of the panel-cellular interface without an aluminum honeycomb sandwich structure.
In the same density of foam, the strength and stiffness of the PMI foam is the highest of all foams. among all the
PMI foam can be used as an advanced composite sandwich structure when the conditions of use are high.
Core materials, such as aerospace, aviation, railway locomotives and ships. PMI foam can be used as a core material
The composite material is produced by a Scrim method, a filament winding method, a pressure casting method, or the like.