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

1. EVA 폼 (에틸렌비닐아세테이트)

특징:

• Fine and uniform cell structure (부드러운 표면)
• High elasticity and toughness
• Good water resistance and durability
• Can be 다이 컷, 열 형성, laminated, 또는 인쇄 easily
• Density range: 30–300 kg/m³
• 사용 가능 various colors and hardness levels

Typical Uses:

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

Pros: Smooth finish, 튼튼한, 사용자 정의 가능, 무독성
Cons: Slightly more expensive than EPE

2. EPE 폼 (확장 폴리에틸렌)

특징:

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

Typical Uses:

• 포장 (전자 제품, 유리, 가구)
• Edge protectors, foam tubes, 단열재

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

3. 스폰지 폼 (Polyurethane or PU Foam)

특징:

• 오픈 셀 구조 (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, 심

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