What is High Frequency Welding (HF Pressing)?

2025-09-05
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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.

High Frequency Welding

 

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.

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The process of your packaging box production?

1. Make knife mold as per box size and structure

2. order material as per mold
3. make printing on material if need to print
4. suppress and cut material
5. Makeboxes with glue edge in machine
6. Package boxes into cartons

How much of your samples cost ?

 1. If samples are without printing, we can make free samples as per your box size or structure;
 2. If samples are silk printing, normally USD 25 per color,depending on your logo colors;
 3. If samples are offset printing, need USD 180 as offset printing mold cost is high.

What is the box size and structure?

1. All boxes are customized and all detailed requirements  can be provided by clients, we are definitely your OEM service supplier.
2. If you have no idea about the measurements and structure  on your products, our professional design team can suggest and solute for you .

Are you able to do design for my products?

Yes, just send us your logo artwork in Vector file, such as AI or PDF format,and text information you want to print ,we can put it on box to make the design to let you check. Once you say ok, then we go on to make samples or production.

FAQs
Do you support custom designs?

Yes, we provide custom packaging designs tailored to your brand and product needs.

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