What is the difference between EVA foam, EPE pěna, and sponge foam

1. EVA pěna (Ethylenvinylacetát)

Funkce:

• Fine and uniform cell structure (hladký povrch)
• High elasticity and toughness
• Good water resistance and durability
• Can be Die-řezaný, tepelně formované, laminated, nebo vytištěno easily
• Density range: 30–300 kg/m³
• Available in various colors and hardness levels

Typical Uses:

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

Pros: Smooth finish, odolný, přizpůsobitelné, netoxický
Cons: Slightly more expensive than EPE

2. EPE pěna (Rozšířený polyethylen)

Funkce:

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

Typical Uses:

• Obal (elektronika, sklo, nábytek)
• Edge protectors, foam tubes, izolace

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

3. Houbová pěna (Polyurethane or PU Foam)

Funkce:

• Struktura s otevřenými buňkami (soft and breathable)
• Very compressible and comfortable
• Absorbs water easily
• Density range: 10–60 kg/m³

Typical Uses:

• Seat cushions, Absorpce zvuku, cosmetic sponges
• Cleaning products, gaskets, vycpávka

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