What is the difference between EVA foam, EPE Ua Npuas Ncauj, and sponge foam

1. EVA ua npuas ncauj (Ethylene Vinyl Acetate)

Nta:

• Fine and uniform cell structure (smooth surface)
• High elasticity and toughness
• Good water resistance and durability
• Can be die-cut, heat-formed, laminated, lossis luam tawm easily
• Density range: 30–300 kg/m³
• Muaj nyob rau hauv various colors and hardness levels

Typical Uses:

• Sports mats, yoga blocks, swimming belts
• Packaging inserts (high-end electronics, Cov cuab yeej)
• Shoe soles, kneeling pads, toys

Pros: Smooth finish, ruaj, customizable, tsis-lom
Cons: Slightly more expensive than EPE

2. EPE Ua npuas ncauj (Expanded Polyethylene)

Nta:

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

Typical Uses:

• Ntim (Khoom siv hluav taws xob, lub khob, rooj tog)
• Edge protectors, foam tubes, rwb thaiv tsev

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

3. Daim txhuam cev (Polyurethane or PU Foam)

Nta:

• Open-cell structure (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, padding

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