Why Use Nitrogen to Weld Plastic?

Nitrogen is used for plastic welding because it creates a stronger, cleaner weld compared to hot air.

Air is composed of 80% nitrogen and 20% oxygen. The oxygen in the air causes oxidation, burning the plastic during the welding process. This results in smoke, ash, and sparks, which weaken the weld and create contamination.

Welding with nitrogen eliminates this issue by flushing out the oxygen from the weld zone. Without oxygen, the plastic melts cleanly without burning or oxidizing. This allows the melted plastics to fuse together with no contamination for a stronger, more durable weld.