2. What materials are involved in HF welding?

2.1 Monomaterials

Electrically insulating thermoplastic materials (electrically non-conductive) are affected by high-frequency welding. Only "polar" materials react to high-frequency welding. They are classified according to their ability to react, based on their weldability factor (Fs).

If the weldability factor Fs is :

• greater than 0.1, then HF welding can be performed without difficulty;

• from 0.01 to 0.1 HF welding requires some care and attention when setting machine parameters;

• from 0.001 to 0.01 HF welding requires the preparation of materials and/or a specific machine with an adapted design.

Most machines...