Heat Resistant Belts for High Temperature Applications
PTFE-coated fiberglass belts – the most common ones being 2-ply belts – are ideally suited where thermal transfer through the surface of the belt is required in order to predominately seal plastic bags.
Applications Involving Thermal Transfer
High volume bag manufacturing systems often use these types of belts (2-ply) running as a pair creating a clamping effect on the bag. These belts can also be found on air fill or air cushioning packaging machines as a means of allowing continuous heat sealing to take place without the molten plastic sticking to the belt.
These sealer belts tend to be two belts that run in tandem on the conveyor with a hot plate that sits in contact with the inside of the belts as they run. The heat transfers through the belts’ surface sealing the plastic bag as it conveys through the machine.
Benefits of Using PTFE-Coated Fiberglass Belts in Heat-Sealing and Packaging
The 2-ply belts are constructed with two layers of PTFE-coated fiberglass fabric that is laminated together. This keeps them from being free of any step at the splice area that could leave mark on the end product ensuring a smooth, continuous thickness along the entire belt length which guarantees a uniform seal in packaging and heat-sealing applications.
The PTFE-coated fiberglass fabric used to manufacture the belts has a non-stick, high temperature resistant surface (up to 500°F) that prevents any molten plastics from building up on the belt surface.
The key properties of this material are:
- Non-stick surface
- Temperature resistant (up to 500°F)
- Lightweight and energy efficient for an economical operation
- Exceptional durability and extremely low elongation (<1%).
Based on years of experience, and sampling many products, we can offer market recommendations for what suits your manufacturing and packaging needs. Contact us to obtain samples for your evaluation today!