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EVA Material from China: Leading Suppliers and Factory for High-Quality Ethylene-Vinyl Acetate Products

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Basic Definitions

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EVA, or Ethylene-Vinyl Acetate, is a versatile thermoplastic polymer composed of ethylene and vinyl acetate. As a popular material among China suppliers and factories, it is used in various applications due to its unique properties. The vinyl acetate (VA) content typically ranges from 5% to 40%, leading to different material characteristics. Depending on the VA concentration, EVA can exhibit enhanced flexibility, transparency, and durability, making it an ideal choice for countless products across industries.

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    Main features

    Flexible elasticity

    The higher the VA content, the softer the material, and the better the elasticity.

    Impact resistance

    Good impact resistance is consistently maintained even at low temperatures.

    Age & Ozone resistance

    More resistant to aging and environmental degradation than ordinary polyethylene.

    Transparency & Gloss

    Can be processed into highly aesthetic translucent or transparent products.

    Non-toxic & Tasteless

    Meets environmental protection requirements, making it ideal for daily use products.

    Good Machinability

    Easy to process via injection, extrusion, foaming, hot pressing, and more.

    Viscosity

    Offers outstanding compatibility and strong adhesion to filling and polar materials.

    Main areas of application

    (1) Footwear Industry
    • Midsole: Foamed EVA provides lightweight, excellent elasticity, and shockproof properties for sports and leisure shoes.
    • Shoe cushions: Serves as a soft, comfortable shock absorber.
    • Slippers: Foam EVA integrated slippers are remarkably light and non-slip.
    (2) Packaging & Buffering Materials
    • Foam EVA can be molded into various customized shapes for protective lining, safeguarding precision instruments, electronic products, gifts, and more.
    (3) Sporting Goods
    • Used in yoga mats, fitness equipment handles, helmet linings, swimsuit frames, and more.
    • Commonly used for children's sports mats and crawling mats (EVA splicing mats).
    (4) Toys & Stationery
    • EVA puzzle mats and children's building blocks (soft, safe, and durable).
    • Stationery items such as stamp pads, protective cases, and organizers.
    (5) Photovoltaics & Cables
    • Photovoltaic packaging film: EVA film is widely used for solar cell module packaging due to its good light transmission, weather resistance, and strong adhesion.
    • Cables: Used for cable shields and high-quality insulation materials.
    (6) Hot Melted Gel
    • EVA with high VA content is key to producing high-performance hot melt adhesives for book binding, furniture edge banding, and packaging bonding.

    Foam EVA (Most common form)

    By adding a foaming agent (such as AC foaming agent) through molding or extrusion, a closed-cell or open-cell foam material is formed, characterized by:

    • Very light weight
    • Excellent buffering and shock-absorption performance
    • Can be easily cut and shaped into any configuration
    • Printable and highly compatible with other composite materials
    Detailed drawing of Foam EVA

    Differences from similar materials

    EVA is softer than PE, more environmentally friendly than PVC (without plasticizers), easier to process than rubber, and lower in price.

    Material Characteristics & Differences
    PE (Polyethylene) Harder and less elastic; not easy to foam into a high-performance elastomer.
    PVC (Polyvinyl Chloride) Adjustable hardness, but often requires the addition of plasticizers, which may raise environmental concerns.
    Rubber Provides good elasticity but is heavy, complex to process, and relatively expensive.

    Note

    High temperature resistance: General EVA use temperature should not exceed 70°C.
    Flammable: Foam EVA is flammable; flame retardants must be added for specific applications.
    Poor oil resistance: Exposure to oil may cause the material to swell or degrade in performance.

    Frequently Asked Questions

    Q What is the relationship between VA content and EVA material properties?

    The VA (Vinyl Acetate) content directly influences elasticity and softness. The higher the VA content in the EVA material, the softer it becomes and the better its elasticity.

    Q Why is Foam EVA widely used in the footwear industry?

    Foam EVA is highly valued for midsoles, cushions, and slippers because it is exceptionally lightweight, shockproof, slip-resistant, and offers excellent cushioning performance.

    Q How does EVA compare to PE and PVC in terms of environmental friendliness?

    EVA is more environmentally friendly than PVC because it does not require plasticizers, which can raise environmental and health concerns. It is also softer and more elastic than PE.

    Q What is the maximum working temperature for standard EVA?

    Generally, the continuous use temperature for standard EVA materials should not exceed 70°C, as high temperatures can degrade its structure and performance.

    Q Does EVA perform well when exposed to oils or fuels?

    No, EVA has poor oil resistance. Exposure to oils, greases, or fuels can cause the material to swell, soften, or lose its structural integrity and performance.

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