EVA material : flexible and versatile "all-purpose player"
2024-03-15
In daily life, you often come into contact with a material called EVA. You may not have noticed its existence, but it is widely used in refrigerator seals, shoe soles, insoles, floor mats and many other fields. Today, let's learn about the past, present and wide range of uses of this "all-round expert" - EVA material.
1. What is EVA material ？
EVA, full name Ethylene-Vinyl Acetate Copolymer, is a thermoplastic elastic material made of ethylene (E) and vinyl acetate (VA). It is between rubber and plastic, with softness, elasticity and good processing performance.
The properties of EVA depend on its VA content. The higher the VA content, the better the elasticity, transparency and softness; while EVA with a lower VA content is closer to polyethylene, with higher strength and greater hardness.
The properties of EVA depend on its VA content. The higher the VA content, the better the elasticity, transparency and softness; while EVA with a lower VA content is closer to polyethylene, with higher strength and greater hardness.
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2. Characteristics of EVA material ?
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Excellent elasticity and softness
EVA has a soft touch similar to rubber and is not easy to break, making it suitable for use as a cushion or sole.
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Good impact resistance and cold resistance
EVA remains flexible at low temperatures and is widely used in refrigerator sealing, refrigerated packaging and other fields.
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Non-toxic, odorless, safe and environmentally friendly
Complies with EU ROHS, REACH and other environmental protection standards, suitable for children's products and medical fields.
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Easy to process and rich in colors
EVA can be processed by foaming, injection molding, extrusion, calendering and other methods, and the product color and shape are varied.
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Waterproof, UV-resistant, chemical-resistant
Can be used in outdoor environments or in scenes where detergents are exposed.
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3. Application of EVA materials
|
Application
|
Typical Products
|
|---|---|
|
Footwear industry
|
Midsole and outsole for sneakers, slippers and sandals |
|
Toys and children's products |
Puzzle mats, baby crawling mats, safety corner protectors |
|
Packaging Buffer |
Instrument packaging liner, electronic product cushioning |
|
Architecture and Engineering |
Thermal insulation, waterproofing membranes, pipe sheathing |
|
Sports facility |
Surfboards, yoga mats, knee and elbow pads |
|
Medical product |
Medical soft pouches, infusion bottle stoppers, braces materials |
|
Stationery |
EVA foam board, DIY handmade materials |
4. Comparison of EVA with other materials
| Comparison of characteristics |
EVA
|
PE（polyethylene）
|
PVC（polyvinyl chloride (PVC)）
|
Caoutchouc |
|---|---|---|---|---|
| Softness | High | Moderate | Moderate | High |
| Resilient | Good | Relatively low | General | Good |
| Processing temperature | Low | Moderate | Moderate | High |
| Environmental | Good | Good | General (chlorine) | General |
| (manufacturing, production etc) costs | General | Low | Low | High |
5. Why choose EVA material ?
With its soft, lightweight, safe and multifunctional properties, EVA material is widely used in all corners of people's daily lives.From children's toys to adult sporting goods to industrial-grade packaging, it has become an indispensable member of the modern material system due to its excellent comprehensive performance.
If you're looking for an environmentally friendly material with excellent cushioning properties, EVA may be just the material for you.
If you're looking for an environmentally friendly material with excellent cushioning properties, EVA may be just the material for you.
If you need more technical data, processing suggestions or supply channels of EVA materials, please leave a message or contact us for information!
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6. Common EVA manufacturers
Internationally renowned manufacturers include Dow Chemical and ExxonMobil in the United States, which have mature EVA production lines and their products are widely used in the fields of footwear, packaging, cables, etc. Mitsui Chemicals and Sumitomo Chemical in Japan are known for their EVA materials with high VA content, which are particularly suitable for high value-added applications such as photovoltaic films and hot melt adhesives. In the Chinese market, the Yangzi Petrochemical-BASF joint venture, Sinopec Maoming Branch, Formosa Plastics and Liancheng Chemical also have strong production capacity and regional competitive advantages, providing diversified EVA solutions for the local market.
The EVA materials we often supply are
| Item/Model | Lotte VS430 | Lotte VA910 | Dow-Mitsui EV210 | Dow-Mitsui EV40W |
|---|---|---|---|---|
| Vinyl acetate (VA) content | 18% ±1 | 28% ±1 | 18% | 28% |
| Melting Index (MI) | 2.5 g/10min | 2.0 g/10min | 2.0 g/10min | 2.0 g/10min |
| density | 0.935 g/cm³ | 0.950 g/cm³ | 0.933 g/cm³ | 0.950 g/cm³ |
| specificities | Moderate flow, good processability | High VA content for better elasticity | General purpose, good foaming properties | High VA for bonding, high elasticity requirements |
| main application | Shoe soles, foam cushioning, EVA sheets | Hot melt adhesive, adhesive film, soft foam | Shoe foam, foam layer, midsole | Hot melt adhesive, photovoltaic film, transparent matting |
| Processing method | Foaming, calendering, extrusion | Extrusion, coating, injection molding | Foaming, injection molding, calendering | Hot melt adhesive coating, film lamination |
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