What is PMI foam?
Polymethacrylimide (PMI) foam is a cross linked rigid structural foam material. It takes the copolymer of methacrylic acid (MAA) and methacrylonitrile (MAN) as the base resin, and is made by a unique solid state foaming technology. PMI foam has a 100% closed cell structure with excellent comprehensive performance. Its uniformly cross linked pore structure endows it with good mechanical properties, heat distortion temperature and chemical stability.
Why use PMI foam Board?
Excellent mechanical properties: It has high specific strength and high specific modulus. Its tensile, compression, bending and shear strength and modulus are far superior to other foam materials or lightweight wood core materials such as PVC, PU and PET, and it has isotropy. It can improve strength, enhance rigidity and reduce weight.
Excellent high temperature resistance: It has a unique cross linked structure and imide ring structure, with good high temperature stability and pressure resistance. The heat distortion temperature exceeds 200℃, which is suitable for high temperature molding or autoclave co curing process. It can shorten the process time, improve production efficiency and improve structural performance.
High closed cell rate: The closed cell rate reaches 95%-98%. When used in composite sandwich structures, it can avoid the moisture absorption and debonding problems of honeycomb core materials, improve safety performance and extend service life. Due to its high porosity and water pressure resistance, it can be used as underwater buoyancy material.
Barrier performance: Due to its high closed cell rate and fine and uniform bubbles, the material has good sound insulation, heat insulation and moisture resistance performance.
Easy to bond: Suitable for epoxy resin, unsaturated polyester and other resin systems with high bonding strength.
Easy processing: Easy to process, can be bent into various curved surfaces under heating conditions, improving the freedom of design.
Fatigue resistance: Its unique molecular structure gives it good fatigue resistance, especially suitable for composite sandwich structures under dynamic load.
Aluminum equivalent and dielectric properties: It has low aluminum equivalent, suitable for the medical equipment industry. It has low dielectric constant, low dielectric loss and good electrical insulation in a wide frequency range, and is also suitable for radar equipment.
