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

1. eva foam (ethylene vinyl acetate)

ຄຸນນະສົມບັດ:

• Fine and uniform cell structure (smooth surface)
• High elasticity and toughness
• Good water resistance and durability
• Can be die-cut, heat-formed, laminated, ຫຼືພິມ 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, ເຄື່ອງມື)
• Shoe soles, kneeling pads, toys

Pros: Smooth finish, ອະົາຫມັ້ນ, ສາມາດປັບແຕ່ງໄດ້, ບໍ່ແມ່ນສານພິດ
Cons: Slightly more expensive than EPE

2. ໂຟມ EPE (Expanded Polyethylene)

ຄຸນນະສົມບັດ:

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

Typical Uses:

• ການຫຸ້ມຫໍ່ທີ່ໃຫຢ່ (ເຄື່ອງໃຊ້ໄຟຟ້າ, glass, ເຄື່ອງດັບເພີງ)
• Edge protectors, foam tubes, ການສອສຕອລ

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

3. Sponge Foam (Polyurethane or PU Foam)

ຄຸນນະສົມບັດ:

• ໂຄງສ້າງເປີດຫ້ອງ (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, ຜ້າປູ

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