What is the difference between EVA foam, EPEフォーム, and sponge foam

1. EVAフォーム (エチレン酢酸ビニル)

特徴:

• Fine and uniform cell structure (滑らかな表面)
• High elasticity and toughness
• Good water resistance and durability
• Can be ダイカット, 熱型, laminated, または印刷 easily
• Density range: 30–300 kg/m³
• で利用可能 various colors and hardness levels

Typical Uses:

• Sports mats, yoga blocks, swimming belts
• Packaging inserts (high-end electronics, ツール)
• Shoe soles, kneeling pads, おもちゃ

Pros: Smooth finish, 耐久性, カスタマイズ可能, 無毒
Cons: Slightly more expensive than EPE

2. EPEフォーム (発泡ポリエチレン)

特徴:

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

Typical Uses:

• 包装 (エレクトロニクス, ガラス, 家具)
• Edge protectors, foam tubes, 絶縁

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

3. スポンジフォーム (Polyurethane or PU Foam)

特徴:

• オープンセル構造 (soft and breathable)
• Very compressible and comfortable
• Absorbs water easily
• Density range: 10–60 kg/m³

Typical Uses:

• Seat cushions, 音の吸収, cosmetic sponges
• Cleaning products, gaskets, パディング

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