EVA Hot-Melt Adhesive Storage — Ethylene-Vinyl Acetate Copolymer Heated-Tank Selection

Storing Hot Melt EVA Copolymer? Start Here

Hot melt EVA copolymer adhesives are essential in industries like packaging, bookbinding, and woodworking. These adhesives are made from ethylene-vinyl acetate copolymer, mixed with tackifiers, waxes, and antioxidants. They are used in a molten state at high temperatures (150-200°C) to bond materials quickly and effectively. If you're working with hot melt EVA, it's crucial to store it properly to maintain its performance and prevent degradation.

Can you store it in a poly tank?

No, polyethylene tanks are not suitable for storing hot melt EVA copolymer in its molten state. The high temperatures required for application will cause polyethylene to melt. For molten storage, use 316L stainless steel tanks with appropriate gaskets and seals. However, unheated EVA pellets can be stored in HDPE bulk bags at room temperature without any issues.

Key Issue: Thermal Degradation

One of the main challenges with hot melt EVA is thermal degradation. If the adhesive is kept at high temperatures for too long, it can char and form scale on tank walls, leading to maintenance issues and reduced adhesive quality. Using tanks with non-stick interior coatings can help minimize this problem.

The safety that actually matters

• Ensure proper ventilation to manage fumes from heated EVA.
• Use personal protective equipment (PPE) when handling molten adhesive.
• Regularly inspect and maintain tanks to prevent char buildup.

Common questions

Can I store hot melt EVA in a plastic tank?

No, plastic tanks are not suitable for molten EVA storage due to high temperatures.

How should I store unheated EVA pellets?

Store unheated pellets in HDPE bulk bags at room temperature.

What materials should I use for gaskets?

Use Viton (FKM) gaskets for heated applications; match gaskets to the manufacturer chart for specifics.