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

1. ईवा फ़ोम (एथिलीन विनाइल एसीटेट)

विशेषताएँ:

• Fine and uniform cell structure (सौम्य सतह)
• High elasticity and toughness
• Good water resistance and durability
• Can be साँचा काटना, गर्मी का गठन, laminated, या मुद्रित 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, tools)
• Shoe soles, kneeling pads, खिलौने

Pros: Smooth finish, टिकाऊ, अनुकूलन, गैर-विषाक्त
Cons: Slightly more expensive than EPE

2. ईपीई फोम (Expanded Polyethylene)

विशेषताएँ:

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

Typical Uses:

• पैकेजिंग (इलेक्ट्रानिक्स, glass, फर्नीचर)
• Edge protectors, foam tubes, इन्सुलेशन

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

3. स्पंज फोम (Polyurethane or PU Foam)

विशेषताएँ:

• ओपन-सेल संरचना (soft and breathable)
• Very compressible and comfortable
• Absorbs water easily
• Density range: 10–60 kg/m³

Typical Uses:

• Seat cushions, sound absorption, cosmetic sponges
• Cleaning products, gaskets, गद्दी

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