| Propietat | Eva Foam | Escuma EPE | Escuma d'esponja (PU) |
|---|
| Superfície | suau & fine | Rougher | Suau, porous |
| Density range (kg/m³³) | 30–300 | 15–50 | 10–60 |
| Water absorption | None | Very low | High |
| Elasticity | High | Medium | Very high (tova) |
| Durabilitat | Excel·lent | Good | Fair |
| Common uses | Esport, envasament, toys | Esmortegar, protecció | Mobles, neteja |
1. Eva Foam (Acetat de vinil etilè)
Característiques:
- Fine and uniform cell structure (superfície llisa)
- High elasticity and toughness
- Good water resistance and durability
- Can be troquelats, format per calor, laminated, o imprès easily
- Density range: 30–300 kg/m³
- Disponible a various colors and hardness levels
Usos típics:
- Sports mats, yoga blocks, swimming belts
- Packaging inserts (high-end electronics, eines)
- Shoe soles, kneeling pads, toys
Pros: Acabat llis, durador, personalitzable, no tòxic
Cons: Slightly more expensive than EPE
2. Escuma EPE (Polietilè expandit)
Característiques:
- Lightweight with larger air bubbles / open cells
- Soft and flexible, excellent Absorció de xocs
- Water and chemical resistant
- Density range: 15–50 kg/m³
Usos típics:
- Embalatge (electrònica, vidre, mobles)
- Edge protectors, foam tubes, aïllament
Pros: Low cost, good cushioning, reutilitzable
Cons: Rougher surface, less firm than EVA, not suitable for precision cutting
3. Escuma d'esponja (Polyurethane or PU Foam)
Característiques:
- Estructura de cèl·lules obertes (soft and breathable)
- Very compressible and comfortable
- Absorbs water easily
- Density range: 10–60 kg/m³
Usos típics:
- Seat cushions, absorció del so, cosmetic sponges
- Cleaning products, gaskets, encoir
Pros: Very soft, confortable, low cost
Cons: Absorbs water, poor durability outdoors, not suitable for heavy loads