¿Cuál es la diferencia entre la espuma EVA?, Espuma EPE, y espuma de esponja

1. Goma eva (Etileno acetato de vinilo)

Características:

• Fine and uniform cell structure (superficie lisa)
• High elasticity and toughness
• Good water resistance and durability
• Can be cortada, formado por el calor, laminated, o impreso easily
• Density range: 30–300 kg/m³
• Disponible en various colors and hardness levels

Typical Uses:

• Sports mats, yoga blocks, swimming belts
• Packaging inserts (high-end electronics, herramientas)
• Shoe soles, kneeling pads, juguetes

Pros: Smooth finish, durable, personalizable, no tóxico
Cons: Slightly more expensive than EPE

2. Espuma de EPE (Polietileno expandido)

Características:

• Lightweight with larger air bubbles / open cells
• Soft and flexible, excellent Absorción de impacto
• Water and chemical resistant
• Density range: 15–50 kg/m³

Typical Uses:

• embalaje (electrónica, vaso, muebles)
• Edge protectors, foam tubes, aislamiento

Pros: Low cost, good cushioning, reutilizable
Cons: Rougher surface, less firm than EVA, not suitable for precision cutting

3. Espuma de esponja (Polyurethane or PU Foam)

Características:

• Estructura de celda abierta (soft and breathable)
• Very compressible and comfortable
• Absorbs water easily
• Density range: 10–60 kg/m³

Typical Uses:

• Seat cushions, absorción de sonido, cosmetic sponges
• Cleaning products, gaskets, relleno

Pros: Very soft, cómodo, low cost
Cons: Absorbs water, poor durability outdoors, not suitable for heavy loads