PMI Foam Core

PMI foam core

PMI Foam Core

PMI foam core also called polymethacrylimide foam, it is a high-performance composite material that has great mechanical properties, high heat & chemical corrosion resistance, recyclability, etc.

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KE - PMI Foam Characteristics

1.High Strength and High Modulus

KM series polymethacrylimide foam boasts the highest specific strength and modulus among foam plastics. Using PMI foam to make composite sandwich structures significantly enhances strength, improves rigidity, reduces weight, prevents instability, and enhances energy efficiency in aircraft.

2.High Closed-Cell Rate

KM series foam features mutually isolated closed cells, which result in low and reasonable resin absorption during composite processing. The isotropic nature of the material makes it convenient for manufacturing composite sandwich structures, especially suitable for high-temperature co-curing processes such as hot pressing, autoclaving, liquid resin infusion, and filament winding. 

3.High Heat Resistance

The polymer chains in KM series foam feature a complete imide ring structure and interchain crosslinking, greatly enhancing the material's heat resistance. It performs excellently in medium-temperature (about 130°C) and high-temperature (about 190°C) co-curing processes in composite sandwich materials, exhibiting low thermal compression creep and excellent high-temperature dimensional and weight stability.

3.High Heat Resistance

The polymer chains in KM series foam feature a complete imide ring structure and interchain crosslinking, greatly enhancing the material's heat resistance. It performs excellently in medium-temperature (about 130°C) and high-temperature (about 190°C) co-curing processes in composite sandwich materials, exhibiting low thermal compression creep and excellent high-temperature dimensional and weight stability.

4. Fatigue Resistance

KM series foam offers excellent fatigue resistance, making it suitable for composite sandwich structures that endure dynamic loads.

5. Processing Convenience

KM series foam is easy to cut into blocks, slices, and mill, and can be processed into shaped foam parts using CNC machines. It can also be bent into various single-curved shapes under heating conditions, increasing design and process flexibility.

6. Easy Bonding

The strongly polar molecular structure and densely packed cell surface of KM series foam allow it to form strong bonds with various resins such as epoxy, bismaleimide, and cyanate ester in composite sandwich material co-curing processes.

7. Low Dielectric

KM series foam exhibits extremely low dielectric constant and loss across a wide frequency range, making it suitable for structural substrates and radomes that need to emit and transmit microwaves (e.g., aircraft radar antenna covers).

PMI foam in Aerospace
PMI Foam core in Automotive
PMI core material for wind energy
PMI core in sport industry
PMI foam core in Construction

PMI Foam Data

Polymethacrylimide foam is known for its exceptional strength, lightweight properties, and high-temperature resistance. These qualities make PMI foam core ideal for various applications in demanding environments, particularly in the aerospace, automotive, Wind Energy, Industrial, Sports and Leisure, Construction, and marine industries. 

Density kg/cm3Standard325275100200
ModelKM32KM52KM75KM110KM200
Mechanical Properties at Room Temperature @ρ=0.30g/cm3Strength of Compression / MPaGB/T8813-20080.40.851.52.88.0
Modulus of Compression / MPa345090145300
Strength of Tensile / MPaGB/T9641-19880.741.22.03.55.0
Modulus of Tensile / MPa3565105165350
Percentage of Breaking Elongation / %2.12.392.442.232.1
Strength of Cutting / MPaGB/T1455-20050.30.81.32.04.2
Modulus of Compression / MPa7.5254550120
Strength of Flexural / MPaGB/T8812-20070.821.92.95.112
Modulus of Flexural / MPa3070100140380
Obturator Ratio %GB/T10799-2008≥95≥95≥95≥95≥95
The working Performace at 130℃Strength of Compression / MPaGB/T8813-20080.280.51.01.84.0
Modulus of Compression / MPa14244875140
Dimensional change rate / %GB/T8811-20080.60.60.30.30.3

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