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MM-W™ MultiMaterial-Welding

MultiMaterial-Welding™ technology (MM-W™ technology) is an innovative fastening technique using ultrasonic energy to create a frictional positive connection in porous materials, sheet structures, sandwich materials, injection-moulded and pressure mouldings. To achieve this, rod or collar-shaped thermoplastic elements are used to fasten components.

Reliable fastening of different materials using an ultrasonic process

Above all in lightweight structural engineering, innovative fastening solutions which offer the highest degree of reliability and efficiency are in great demand. Through the introduction of ultrasonic energy to fixing and fastening solutions, joining of element is accomplished safely and in many cases without much preparation. Ideally, the connecting element should become part of the carrier material.

The MM-W™ technology originated from the WoodWelding® technology, which has been in use for years not only in woodworking but also in surgery.


Benefit from our expert knowledge, gain interesting insights into MultiMaterial Welding™. The webinar was already held but you can download the webinar for free. 

Topic: Connecting Modern with MultiMaterial Welding™

  • Speaker: Lasse Behrmann, MSc Project Manager Lightweight Technologies, KVT-Fastening

  • Language: The webinar was held in English - but we are also happy to answer your questions in German
> Download the webinar


  • Significantly stronger connections than with many other fastening methods

  • Can be used without pre-setting to take up tolerance

  • Clean processing, as no additional materials or or pre-treatment of surfaces is required and no waste is produced

  • Statistical check on the process, which guarantees the quality of the individual fastenings

  • The technology is used in a wide range of industrial processes and in other industries, such as medicine and the furniture industry

MM-W™ technology portfolio

LiteWWeight™ Core

Fastening on honeycomb structures and/or porous building components


Durable bonding solutions and at the same time fast and reliable fastening processes for lightweight honeycomb-core construction.


  • High strength
  • No pilot drilling needed
  • Very fast cycle times
  • Not limited to circular geometries
  • Integration into a functional building component possible

LiteWWeight™ Layer

Bonding to porous polymer and metal structures

High strength and quick-fastening solutions for foamed lightweight material structures, which can also be untightened again and re-used.


  • High strength
  • Durable thread
  • Very short cycle times
  • Not limited to circular geometries

InWWerse™ Disc

Bonding thin-walled polymer components


Used for covers or for an invisible fastening between two non-weldable types of plastic, when the class A surface requirement is maintained.


  • Use for conventional, non-weldable polymer combinations
  • Thin-walled polymer parts without affecting the opposite surface
  • Very short cycle times


Fixing in and around lightweight fibre material


Fast and reliable connection concept for fibre components and textile structures


  • Very fast cycle times
  • High strength due to intensive integration in the fibre matrix
  • Simple and more complex 3-D geometries (due to direction of motion of the fastening element only being in the z-direction)
  • Ideal integration into textile structures possible

Reliable connections of different materials with the ultrasonic procedure

Above all in lightweight building technology, innovative fastening solutions affording the greatest possible degree of reliability and efficiency are in great demand.
With the introduction of ultrasonic energy into fastening and connection solutions, joining elements becomes more reliable and in many cases can be undertaken without extensive preparation.
Ideally, the fastening element should be part of the carrier material.

The MM-W™ technology has its origins in WoodWelding® technology, which has for years been used not only in the timber industry but also on surgery.

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