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

1. فوم EVA (اتیلن وینیل استات)

امکانات:

• Fine and uniform cell structure (سطح صاف)
• High elasticity and toughness
• Good water resistance and durability
• Can be مردن, دارای حرارت, laminated, یا چاپ شده easily
• Density range: 30–300 kg/m³
• موجود در various colors and hardness levels

Typical Uses:

• Sports mats, yoga blocks, swimming belts
• Packaging inserts (high-end electronics, ابزار)
• Shoe soles, kneeling pads, اسباب بازی ها

Pros: Smooth finish, بادوام, قابل تنظیم, غیر سمی
Cons: Slightly more expensive than EPE

2. فوم EPE (پلی اتیلن منبسط شده)

امکانات:

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

Typical Uses:

• بسته بندی (الکترونیک, شیشه, مبلمان)
• Edge protectors, foam tubes, عایق

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

3. اسفنج اسفنجی (Polyurethane or PU Foam)

امکانات:

• ساختار سلول باز (soft and breathable)
• Very compressible and comfortable
• Absorbs water easily
• Density range: 10–60 kg/m³

Typical Uses:

• Seat cushions, جذب صدا, cosmetic sponges
• Cleaning products, gaskets, بالشتک

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