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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FAQs
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We offer one-stop packaging solutions, including design, printing, and handicraft processing for electronic boxes, plastic boxes, paper boxes, paper bags, and book printing.

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Yes, we export worldwide and work with reliable logistics partners for timely delivery.

About us
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.

Leading time for samples production?

Normally we need 3-7 days for samples making, 10-12 days to complete your orders,but the delivery time more depends on the order QTY.

How many kinds the printing process you have?

We can make Silk screen printing, offset printing, and also hot silver stamping

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