High performance polymethacrylimide (PMI) foam

High performance polymethacrylimide (PMI) foam

Summary:PMI foam products include three categories: fine pores, coar...

PMI foam products include three categories: fine pores, coarse pores, and ultrafine pores. PMI foam is used as a high-performance composite core material, which can simplify the process, shorten the process, and solve the problem of coarse pores, easy moisture absorption and easy debonding of honeycomb core materials, and solve the problem of low strength and modulus of general foam core materials. Low and low heat resistance. The performance advantages are: high mechanical properties: high specific strength, high specific modulus, tensile strength, compression, bending, shearing and other strengths and moduli are far superior to other foams or light such as pvc, pu, pet, etc. Wood core material, and isotropic, can improve strength, improve rigidity and reduce weight.


High heat resistance: unique cross-linked structure, imide ring structure, high temperature stability and pressure resistance, heat distortion temperature 200 ° C, suitable for high temperature molding or vacuum autoclave co-curing molding process, shortening process time, Improve production efficiency, improve structural performance; high closed porosity: closed cell ratio of 95% to 98%, used in composite sandwich structure, can avoid the moisture absorption and degumming problems that may occur in honeycomb core materials, improve safety performance and prolong service life. . Due to the high closed cell ratio and water pressure resistance of PMI foam, it can be used as an underwater buoyancy material. High closed cell ratio and fine and uniform cells also make the material have good sound insulation, heat insulation and moisture barrier properties; easy to bond: adapt to various resin systems such as epoxy and unsaturated polyester, and have high bonding strength.


Convenience of processing: easy to machine; can be bent into various curved surfaces under heating conditions, improving design freedom; fatigue resistance: unique molecular structure gives it good fatigue resistance, especially suitable for dynamic load Composite sandwich structure; dielectric properties and aluminum equivalent: low dielectric constant, low dielectric loss over a wide frequency range, PMI foam with good electrical insulation, suitable for radar equipment. Low aluminum equivalent, suitable for the medical device industry.