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What's the difference between Packaging Sponge of EPE foam, EVA foam, and Sponge?

Sep. 27, 2022

What's the difference between Packaging Sponge of EPE foam, EVA foam, and Sponge?


EPE Foam

EPE (pearl cotton, Expandable Polyethylene), Polyethylene, also known as pearl cotton. Non-crosslinked closed-cell structure, which is a high foam polyethylene product extruded from low-density polyethylene (LDPE) as the primary raw material, is composed of numerous independent bubbles produced by physical foaming of low-density polyethylene grease. It overcomes the shortcoming of the ordinary foaming gum which is fragile, deformed, and weak in recovery. It has many advantages, such as waterproof, shockproof, sound-proof, heat preservation, good plasticity, strong toughness, recycling, environmental protection, strong collision resistance, as well as excellent chemical resistance.


Advantages: environmental protection, no pollution, no waste gas and wastewater in the production process, the auxiliary materials used in the production of pearl cotton such as monoglyceride (food-grade additive), talcum powder, butane gas do not produce chemical reaction is physical foaming. The EPE pearl cotton produced is biodegradable. If the unused pearl cotton is thrown into nature, it will decompose into small particles after being irradiation by ultraviolet light, which will not pollute the environment. Moreover, the discarded EPE pearl cotton can be recycled.

Disadvantages: more fragile than ordinary foam, easy deformation, poor recovery.


Packing SPONGE

Packing Sponges are mostly composed of polyisocyanates and polyols as materials. The first reaction is the reaction of polyurethane produced by polyols and polyisocyanates. The commonly used sponge is called polyurethane soft foaming rubber. And elastic data for shock absorbers and conflict resistance.

Advantages: lightweight, good elasticity, convenient transportation, low price.

Disadvantages: it belongs to synthetic chemical materials and cannot be degraded naturally.


EVA Foam

EVA is made by copolymerization of ethylene (E) and ethylene acetate (VA).EVA is characterized by exceptional softness, the elasticity of rubber, under - 50 ℃ can still have good flexible, good transparency, or surface gloss, excellent chemical stability, anti-aging, and good ozone resistance strength, non-toxic. Proper mixing with filler, good coloring, and molding.

EVA can be injection molding, extrusion, blow molding, rolling plastic vacuum thermoforming, foaming, coating, heat sealing, welding, and other molding processing, can be used as building materials used as waterproof, arson, sound insulation, and other functions.


Advantages: waterproof, anti-corrosion, shockproof, anti-static, heat preservation, sound insulation and other features widely used in medical, electronics, electrical appliances, hardware, lighting, crafts, home appliances, furniture, toys and other high-end gifts and fragile packaging;Because its prevent slippery wear-resisting, also often be used at shoe course of study.

Disadvantages: EVA is substantial, a little too heavy when it is too thick.


As a professional ODM OEM manufacturer in China, Dongguan Tepai Machinery has been specializing in providing EPE Foam Sheet Extrusion Machine. For more information, welcome to contact us at +86 138 0962 5140 or write to us at We will be happy to help you out!

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