Expanded Polypropylene (EPP) is a highly versatile closed-cell bead foam that provides a unique range of properties, including outstanding energy absorption, multiple impact resistance, thermal insulation, buoyancy, water and chemical resistance, exceptionally high strength-to-weight ratio and 100% recyclability. EPP can be made in a wide range of densities, from 15 to 200 grams per litre, which are transformed by moulding into 18 to 260 grams per litre. The steam chest moulding process fuses individual beads into the final product form, resulting in a strong and lightweight shape.
EPP is a fantastic material used for purposes which require elasticity in repetitive static and dynamic loads. It's a properly foamed polypropylene in the form of closed grains filled with air, which create closed cellar structures. It is the structure that polypropylene foam owes its properties.
Low weight, high energy absorption, well chemical resistance and great susceptibility to thermoforming, to name a few. Furthermore, it has shape memory - that is the ability to return to the previous shape after being exposed to a load.
Features
- Light-weight, waterproof, Antiflaming and self-extinguishing, etc
- Sound insulation, heat insulation, noise absorption, heat preservation and anti-corrosion
- Tough, rigid with a high impact strength, not easy to age and can keep its colour for long time
- Easy to clean and maintain
- Environmental-friendly green healthy materials
The main performance parameters are shown in Table
| Subject | Description |
| Exposure Media | 7 days immersion at 22°C
KEY: 1 = no
Change 2 = slight swelling |
| Petrol / Gasoline | 2 |
| Gas-oil | 2 |
| Kerosene | 2 |
| Mineral oil | 2 |
| Toluene | 2 |
| A-cetone | 2 |
| Ethyl alcohol | 1 |
| n- Heptane | 2 |
| Ethyl acetate | 1 |
| Methyl ethyl ketone | 2 |
| 10% Sulfuric acid | 1 |
| 10% Nitric acid | 1 |
| 10% Hydrochloric acid | 1 |
| 10% Sodium hydroxide | 1 |
| Ammonium solution | 1 |
EPP is widely utilised by automotive manufacturers because of its performance benefits for energy management, lightweight, enhanced functionality, durability and recyclability. Applications include seating, bumpers, stowage systems, door panels, pillars, floor levellers, parcel shelves, headrests, tool kits, sun visors and myriad filler parts.
Reusable industrial packaging, known as dunnage, is frequently made from EPP due to its durability and its inherent ability to absorb energy in transit. EPP is used increasingly in furniture, toys such as model aircraft and other consumer products due to its versatility as a structural material and its lightweight, as well as other performance characteristics. appro colour range
EPP is approved for use in conjunction with food products. Its thermal insulation properties and structural strength make it appropriate for containers such as food delivery containers and beverage coolers and the like. EPP does not support microbial growth and can be made sterile with steam cleaning.
EPP was first developed in the 1970's as a result of research into new forms of polypropylene. The material's first applications were for automotive products in Japan in 1982. Demand for EPP has since increased dramatically in all regions of the world based partly on the need of automakers to improve energy management functions whilst reducing weight and improving environmental benefits. The first automotive application for EPP was for an energy-absorbing component in a bumper system. EPP is now widely utilised for numerous other automotive parts and systems, including seating and other interior components
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