High-frequency welding

This technique applies to plastic materials in the form of single, semi-rigid or rigid sheets. Thermoplastics such as phthalate-free PVC, TPU and EVA are the most commonly used. High-frequency weldingjoins two or more sheets together by applying an electromagnetic field. The zone reproduces the shape of the tooling called an electrode.

The high-frequency welding method depends on :

  • Type of material
  • Product shape
  • Product dimensions
  • The number of sheets to be assembled

Step 1

Study

Step 2

Raw material

Step 3

Welding

Step 4

Controls

Step 5

Packaging & shipping

Advantages of high-frequency welding

  • High mechanical strength of the weld
  • Complex shapes
  • Possibility of combining a flexible container with a thermoformed product
  • Rapid prototyping
  • Custom design
  • High speeds
  • Moderate tooling costs

Product types

2 main product families

  • Flexible devices: Watertight containers, Inflatable bladders, Airbags, Heat exchangers, Pouches with tube, Cushions, seats, Dosettes, berlingots
  • Communication media : Wristbands, Presentation cases, Label holders, Document holders, Pockets

Related services

  • Sourcing, assembly of components (valves, taps, plugs, etc.)
  • Personalization (branding, 2-color screen printing, printing)
  • Leak test on request

Application markets

  • Automotive
  • Industry
  • Health
  • Defense
  • Paramedical
  • Leisure
  • Personal protective equipment
  • Communication

Our strengths :

  • Proven expertise in high-frequency welding combined with knowledge of plastic materials (TPU, EVA, phthalate-free PVC…).
  • An integrated design and engineering office for the production of prototypes/models, facilitating product development and fine-tuning.
  • A quality department backed by 1 laboratory to carry out tests (tensile strength, tightness) on request
  • A comprehensive, made-to-measure service including component sourcing, component assembly and customization (printing, labels, markings, etc.).
  • A plant dedicated to this know-how, which also has clean rooms and works with major international groups.

For further information

The Gender Equality Index was established by the Law on the Freedom to Choose One’s Career Future. It is a tool designed to calculate the pay gap between men and women.
This index allows companies to assess the level of gender equality out of 100 points. It is calculated based on the following criteria:

  • Gap in pay between women and men
  • Gap in individual pay raise rates
  • Number of female employees receiving raises following maternity leave
  • Parity among the 10 highest paid employees
  • Gap in promotion rates

The VELFOR Group has calculated its Gender Equality Index. For 2024, it stands at 92/100:

  • Pay gap indicator: 37 points out of 40
  • Individual pay increase rate gap indicator: 35 out of 35
  • Return from maternity leave indicator: 15 out of 15
  • High pay indicator: 5 out of 10