What’s the difference between EPE packaging foam, EVA packaging foam, sponge packaging materials?
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.
Disadvantages: it belongs to synthetic chemical materials and cannot be degraded naturally.
Advantages: lightweight, good elasticity, convenient transportation, low price.
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.
Disadvantages: EVA is substantial, a little too heavy when it is too thick.
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.
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.
Disadvantages: more fragile than ordinary foam, easy deformation, poor recovery.
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.
The differences between the 3 are as follows:
1. Sponge can be distinguished with the naked eye, the general micro - yellow sponge, very elastic, relatively light than these three.
2. EPE pearl cotton is generally white, and the sponge is perfect to distinguish, sponge no matter how you divided into the original state, and EPE pearl cotton you press hard will hear the sound of popping, pushing the place will be concave.
EPE pearl cotton is wavy and looks very light with lots of foam.
3. The hardness of EVA is the strongest, and it is the heaviest among the three.
The difference between EVA, EPE, and sponge can be distinguished with the naked eye. The sponge is generally yellowish and very elastic, which is relatively lighter than these three.EVA is a little hard, usually black, is the three inside massive, EPE pearl cotton is generally white, it is straightforward to distinguish with sponge, sponge no matter how you press will be divided back to its original state, and EPE pearl cotton you push hard will hear the sound of popping, touching the place will concave.