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 welding joins 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

Our expertise enables us to assist you in your choice of materials and design:

  • Specific, rounded shapes
  • Low or high temperatures : – 80 °C and + 80 °C
  • Mechanical resistance
  • Compatibility with many active pharmaceutical ingredients
  • Suitable for various types of sterilization
  • UV resistance
  • O² and CO² barrier
  • Airtight and liquid-tight

Step 1

Study / specifications

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, rounded shapes
  • Possibility of combining a flexible container with a thermoformed product
  • Rapid prototyping
  • Custom design
  • High speeds
  • Moderate tooling costs
  • Accessories (foam, beads, etc.) can be added inside
  • Different tubes can be integrated …

Product types

  • Watertight devices: free-standing bags, enema bags, blood bags, collection bags, dialysis bags, sampling bags, infusion bags, cerebrospinal fluid bags, anti-bedsore cushions
  • Thermoformed and flexible medical devices: laser protection sleeves, ostomy pouches
  • Heat exchanger pocket

Related services

  • Sourcing of components (needles, tubes, etc.)
  • Component and tube assembly business
  • Packaged in flexible bags
  • Customization (marking, logo, graduation, etc.)
  • Leak test on request
  • Complete traceability from welding to assembly

Application markets

  • Pharmaceuticals
  • Biotechnology
  • Veterinarian
  • Paramedical
  • Medical

Our strengths :

  • Proven expertise in high-frequency welding combined with knowledge of plastic materials(TPU, EVA…)
  • Eco-design: from choice of material to flexible bag packaging
  • An integrated design and engineering department to produce prototypes/models, facilitating product development and fine-tuning.
  • A quality department backed up by a laboratory to carry out tests (traction, tightness) on request
  • A comprehensive made-to-measure service including sourcing, component assembly, personalization and assembly (printing, labeling, marking, etc.).
  • A plant dedicated to this know-how, which also has clean rooms and works with major international groups.
  • A large-scale industrial park enabling us to offer complete surgical kits (thermoformed trays, components, assembled pouches, Tyvek sealing).
  • Quality control and risk management throughout the product process

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