Engineering Flexibility with Controlled Polarity

Transform your polymer applications with our Ethylene Vinyl Acetate portfolio, where controlled vinyl acetate incorporation creates a perfect balance of flexibility and performance.

Understanding EVA (Ethylene Vinyl Acetate)

Ethylene Vinyl Acetate represents an elegant example of copolymer engineering, where vinyl acetate (VA) units are precisely incorporated into the polyethylene backbone. The VA content acts like molecular softeners along the polymer chain – imagine placing small cushions at regular intervals along a rigid rope. As we increase the VA content, the polymer becomes increasingly flexible and transparent, while maintaining its toughness. This unique structure allows us to create grades ranging from thermoplastic to rubber-like properties.

EVA Classifications

Low VA Grades (3-12% VA Content)

Our low VA content portfolio features melt flow indices (MFI) from 0.5 to 5 g/10min, designed for applications requiring moderate flexibility with excellent strength. These grades behave similarly to enhanced polyethylene, offering improved clarity and flexibility while maintaining good heat sealability. The lower VA content ensures excellent processability in extrusion and injection molding processes, making them ideal for film applications where clarity meets toughness.

Medium VA Grades (15-20% VA Content)

These versatile grades showcase MFI ranges from 2 to 8 g/10min, offering increased flexibility and transparency. At this VA level, the polymer exhibits excellent low-temperature performance while maintaining good mechanical properties. Their enhanced elasticity makes them perfect for footwear foams and adhesive applications, where resilience meets processability.

High VA Grades (25-40% VA Content)

Our high VA content grades feature MFI ranges from 3 to 15 g/10min, delivering maximum flexibility and optical clarity. These grades approach rubber-like properties while maintaining thermoplastic processability. Their exceptional softness and resilience make them ideal for specialized applications like solar encapsulation films and high-performance wire and cable compounds.

Hot Melt Adhesive Grades

Specifically engineered for adhesive applications, these grades offer MFI ranges from 150 to 500 g/10min with varying VA contents (18-28%). Their carefully controlled molecular weight and VA distribution ensure excellent adhesion to various substrates while maintaining optimal melt viscosity for application. Think of them as molecular bridges, capable of bonding different materials through their balanced polar and non-polar nature.

Applications in Modern Industry

The solar energy industry has been revolutionized by EVA's unique properties, particularly in photovoltaic module manufacturing. High VA grades create perfect encapsulation films that protect solar cells while maximizing light transmission. These films must maintain their properties for decades under intense UV exposure and varying weather conditions – a challenge that EVA meets exceptionally well.

In the footwear industry, EVA has transformed the production of comfortable, durable soles and midsoles. Through controlled foaming processes, medium VA grades create lightweight yet resilient materials that provide excellent cushioning and impact absorption. The material's ability to be colored and modified with various additives allows for creative design possibilities while maintaining functional performance.

The packaging sector leverages EVA's versatility across multiple applications. Low VA grades enhance the performance of packaging films, providing improved clarity and sealing characteristics compared to standard polyethylene. The material's excellent low-temperature performance ensures package integrity even in cold storage applications.