What Is EVA Glue?

Ethylene vinyl acetate (EVA) hot melt adhesive glue is a solid polymer that is solvent-free, no moisture at room temperature. Eva based hot melt adhesive is solid, heating to a certain temperature, into the flow and a certain viscosity of the liquid binder. After melting, ethylene vinyl acetate adhesive is transparent or translucent yellowish or white. EVA based hot melt adhesive is known for its versatility and easy use. Ethylene vinyl acetate glue can be widely used in packaging materials, book binding, wood processing and air filter production and many other industries. With its low price and stable performance, eva based adhesive has become the main branch of the hot melt glue china industry. For more hot glue types such as eva glue stick in bulk prices, inquiry us.

What is EVA Based Hot Melt Adhesive?

EVA based hot melt adhesive is a thermoplastic adhesive, meaning it softens and becomes adhesive when heated, and then hardens upon cooling. The adhesive comes in various forms, such as sticks, pellets, or glue blocks. When heated with a hot glue gun, the EVA melts and becomes sticky.

This allows it to bond different materials together as it cools and solidifies.

EVA hot melt adhesives primarily consist of two key components:

Ethylene Vinyl Acetate (EVA) Copolymer:

This is the base polymer that provides the adhesive properties. It's a thermoplastic material, meaning it softens and becomes sticky when heated, allowing it to form bonds. The ratio of ethylene to vinyl acetate in the copolymer can vary, influencing the adhesive's flexibility, strength, and processing characteristics.

Additives:

Various additives are included in the EVA based hot melt adhesive formulation to enhance its performance and functionality. These additives can include:

Tackifiers: These improve the initial tack and grab of the adhesive, allowing it to quickly form a bond with the materials being joined.

Plasticizers: These enhance the flexibility of the adhesive after it cools and hardens, preventing cracking or brittleness.

Antioxidants: These help prevent the EVA from degrading due to heat or oxidation over time, maintaining the adhesive's long-term performance.

Fillers: These can be inert materials like calcium carbonate that add bulk and can influence the viscosity, cost, and some bonding properties of the adhesive.

Waxes: These can be included to modify the processing characteristics of the adhesive, such as its flow behavior during application.

Colorants: Pigments or dyes may be added for aesthetic purposes or to indicate the adhesive type.

The specific types and ratios of these additives will vary depending on the manufacturer and the intended application of the EVA based hot melt adhesive. Some formulations might also incorporate additional specialty additives to enhance specific properties, such as flame retardancy or UV resistance.

Benefits of EVA Based Hot Melt Adhesive

1. Fast Setting Time

EVA hot melt adhesives set quickly upon cooling, which significantly speeds up production processes and reduces downtime. This rapid setting allows products to be handled almost immediately after application, improving workflow and overall productivity.

2. Strong Adhesion

These adhesives provide strong bonding to a wide variety of substrates, including paper, wood, plastics, and fabrics. The durable bonds they form can withstand various environmental conditions, ensuring long-lasting performance.

3. Flexibility

EVA hot melt adhesives remain flexible even after setting, which is beneficial for applications that require some degree of movement or flexibility. This flexibility also allows the adhesive to absorb shocks and impacts, making it suitable for dynamic applications like packaging.

4. Non-Toxic and Safe

EVA hot melt adhesives are typically non-toxic and safe to use, which is crucial for applications in packaging, consumer goods, and food-related products.