PMI Foam Technical Specifications
|
Item
|
Unit
|
MKS
CK52
|
MKS
CK72
|
MKS
XK32
|
MKS
XK52
|
MKS
XK75
|
MKS
XK110
|
MKS
XK200
|
MKS
CX32
|
MKS
CX52
|
MKS
CX75
|
MKS
CX110
|
|
Density
|
kg/m³
|
52±8
|
72±11
|
32±5
|
52±8
|
75±11
|
110±16
|
200±30
|
32±5
|
52±8
|
75±11
|
110±16
|
|
Length
|
mm
|
2500
|
2500
|
2500
|
2500
|
2500
|
1900
|
1600
|
2500
|
2500
|
2500
|
1900
|
|
Width
|
mm
|
1250
|
1250
|
1250
|
1250
|
1250
|
900
|
800
|
1250
|
1250
|
1250
|
900
|
|
Thickness
|
mm
|
75
|
80
|
80
|
80
|
80
|
80
|
50
|
80
|
80
|
80
|
75
|
|
Dimensional Change Rate
(130°C,3h)
|
%
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
|
Compressive Strength
|
MPa
|
0.6
|
1.2
|
0.3
|
0.8
|
1.2
|
2.4
|
7.5
|
0.4
|
0.8
|
1.5
|
2.3
|
|
Compression Modulus
|
MPa
|
32
|
60
|
18
|
40
|
60
|
90
|
200
|
18
|
30
|
56
|
90
|
|
Tensile Strength
|
MPa
|
0.8
|
1.5
|
0.8
|
1.2
|
1.8
|
3
|
5.5
|
0.8
|
1.2
|
2
|
3
|
|
Tensile Modulus
|
MPa
|
45
|
80
|
30
|
50
|
80
|
130
|
240
|
30
|
50
|
80
|
100
|
|
Elongation at Break
|
%
|
1.3
|
1.5
|
2.5
|
2
|
2
|
2
|
1.5
|
2
|
2
|
2
|
2.5
|
|
Bending Strength
|
MPa
|
1.2
|
1.8
|
0.6
|
1.5
|
2.2
|
4
|
10
|
0.6
|
1.5
|
2.5
|
4
|
|
Shear Strength
|
MPa
|
0.5
|
1
|
0.3
|
0.6
|
1.1
|
1.7
|
4
|
0.3
|
0.6
|
1
|
1.3
|
|
Shear Modulus
|
MPa
|
20
|
30
|
8
|
20
|
24
|
40
|
100
|
9
|
20
|
30
|
45
|
|
Heat Distortion Temperature
|
°C
|
180
|
180
|
180
|
180
|
180
|
180
|
180
|
180
|
180
|
180
|
180
|
Polymethacrylimide(PMI) foam is a rigid, closed-cell foam material, typically white or light yellow, featuring characteristics such as light weight, high strength, environmental friendliness, high-temperature resistance, low dielectric constant, ease of processing, fatigue resistance, good adhesion, and high closed-cell content.
When used as a core material in composite sandwich structures, PMI foam can simplify the manufacturing process, shorten production cycles, and overcome issues associated with honeycomb cores, such as coarse cells, moisture absorption, and delamination, as well as problems of traditional foam cores, including low strength, low modulus, and poor heat resistance. It effectively enhances the durability and reliability of composite sandwich components.
- High Mechanical Performance
Featuring high specific strength and high specific modulus, its tensile, compressive, flexural, and shear strengths, moduli, and hardness are all significantly superior to those of PVC, PU, PET foams and balsa wood cores. With isotropic properties, it enhances strength, improves stiffness, and reduces weight.
PMI foam features a unique imide ring structure and inter-chain crosslinked network, providing excellent thermal stability and compressive resistance at elevated temperatures. It exhibits low high-temperature compressive creep and can withstand processing temperatures above 130 °C, up to a maximum of 200 °C. This makes it suitable for high-temperature compression molding or
vacuum autoclave co-curing processes, helping to shorten processing cycles, improve production efficiency, and enhance structural performance.
- High Closed-Cell Ratio
With a closed-cell ratio of 95%–98%, this material outperforms honeycomb core materials when used in composite sandwich structures, preventing moisture absorption and debonding issues. It enhances safety performance and extends service life. Due to its high closed-cell ratio and resistance to water pressure, it can also be used as an underwater buoyancy material.
- Easy Bonding
Compatible with various resin systems such as epoxy, unsaturated polyester, and bismaleimide resins, offering high bonding strength.
Its unique molecular structure provides excellent fatigue resistance, making it especially suitable for composite sandwich structures subjected to dynamic loads.
PMI foam is easy to machine and can be thermoformed into various curved surfaces under heating, enhancing design flexibility.
- Low Dielectric Properties
PMI foam exhibits an extremely low dielectric constant and dielectric loss over a wide frequency range, making it suitable for structural substrates and radomes that require microwave transmission (e.g., aircraft radar antenna radomes).
When used as a tabletop material in medical imaging equipment, PMI foam enables clear imaging with the lowest possible radiation dose.
|
Application
|
Description
|
|
Aerospace & Aviation
|
Used in composite sandwich structures, fuselage panels, wing panels, and other lightweight, high-strength structural components.
|
|
Radar Antennas / Radomes
|
Low dielectric loss material, suitable for microwave-transparent radomes and antenna housings.
|
|
UAV / Drone Structures
|
Lightweight core material, improving flight efficiency and structural strength.
|
|
Wind Turbine
|
Blade shear web material, enhancing strength while reducing weight.
|
|
Rail & High-speed Train
|
Sandwich structures and car body panels, used to reduce vehicle weight and improve performance.
|
|
Marine & Yacht
|
Composite sandwich hull panels and deck core materials, resistant to water and corrosion.
|
|
Sports Equipment
|
High-performance core material used in skis, bicycle frames, surfboards, and other sports gear.
|
|
Medical Equipment
|
X-ray / CT tabletops, low aluminum equivalent, achieving clear imaging with minimal radiation exposure.
|
|
Audio & Speaker
|
Used as vibration-damping core material, enhancing sound performance and stability.
|
