What is MPP Foam?
MPP (Microcellular Polypropylene) is a closed-cell polypropylene (PP) thermoplastic foam material with a cell size of less than 100 μm. It is produced using supercritical fluid foaming technology and is a renewable polymer foam. Compared with standard PP or EPP foam, MPP foam is enhanced through material modification and optimized processing, offering improved mechanical strength, heat resistance, and dimensional stability.
Advantages of MPP Foam
- Rigidity and Toughness: Existing foam materials are either hard and brittle, or soft and tough, and it is difficult to have both rigidity and toughness. The microporous polypropylene foam material has both rigidity and toughness, which complements the deficiency of the performance of the existing foam material.
- Environmental Protection: The MPP foaming process is clean and pollution-free, and it can be recycled and reused. It is an environmentally friendly product.
- High Temperature Resistance: The thermal deformation temperature of PP foam material is much higher than that of PS and PU foam materials.
- Thermal Insulation: The micron-sized cells effectively reduce the convection of gas in the foam, thereby effectively reducing the heat transfer caused by air convection.
- Lightweight: The density of MPP foam is generally below 50kg/cm³.
- Waterproof: Micron-sized cells make its extremely low water absorption.
Physical Properties of MPP Foam
| Cell Size | 1~10micron |
| Density | 30~120kg/m³ |
| Heat Distortion Temperature | 60~100°C |
| Thermal Conductivity | 0.04~0.08W/m·K |
| Water Absorption | ≤0.5% |
Mechanical Properties of MPP Foam
| Density Magnification | 10 | 15 | 20 | 25 |
| Density(g/cm³) | 90 | 60 | 45 | 36 |
| Compressive Strength(Mpa） | 0.45 | 0.30 | 0.25 | 0.18 |
| Bending Strength(Mpa） | 0.8 | 0.68 | 0.44 | 0.36 |
| Flexural Modulus(Mpa） | 30 | 25 | 20 | 15 |
| Hardness(HC） | 81 | 70 | 66 | 55 |
Common Applications of MPP foam
MPP foam combines the excellent processability of thermoplastics with the lightweight advantages of foam materials, making it widely used in applications that require lightweight design, structural strength, and long-term durability.
Sports Products
Skiboards, surfboards, and other sports equipment requiring cushioning.
Product Packaging
Especially suitable for fields such as medical devices and food where high hygiene standards for packaging materials are required.
New Energy Vehicles
MPP foam can be used for buffering between battery cells, and can also delay the propagation time of thermal runaway, enabling lightweight design.
Composite Panel Manufacturing
Used as core material for sandwich panels in trucks and trailers to reduce vehicle weight.
Model
MPP foam can be precisely CNC-machined and accurately cut into various complex shapes.
Medical Devices
The non-toxic and environmentally friendly properties of MPP foam make it an ideal choice for packaging medical devices.