What is High Frequency Welding (HF Pressing)?

High frequency welding, also known as radio frequency (RF) or high frequency (HF) pressing, is a process commonly used for bonding thermoplastic materials such as PVC, PU, EVA, and synthetic leather. It works by applying a high-frequency electromagnetic field (usually 27.12 MHz or 40.68 MHz) to the material, causing the molecules to vibrate, generate heat, and fuse together under pressure.

Key Features of HF Welding:

1. 1.Strong Bonding – Produces firm and durable joints that are difficult to separate.

2. 2.High Efficiency – Fast heating and short welding cycles make it suitable for mass production.

3. 3.Wide Applicability – Works well with PVC, PU, EVA, and other thermoplastic materials.

4. 4.Neat and Attractive Finish – Weld lines are smooth, and the process can include embossing or trimming.

5. 5.Eco-Friendly – No need for chemical adhesives, making it safer and more sustainable.

6.  

Common Applications:

• *PVC or PU packaging boxes

• *Stationery items (card holders, binders, name card albums)

• *Inflatable toys, swimming rings, air beds

• *Medical products (IV bags, blood bags)

• *Automotive interiors and synthetic leather products

Conclusion:
High frequency welding is a reliable, efficient, and eco-friendly method of bonding plastic and synthetic materials. It not only ensures durability but also enhances product appearance, making it widely used in packaging, medical, and consumer goods industries.