Fundamentals of Ultrasonics - NONWOVENS

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Touch-free welding, laminating, perforating and cutting for continuous processing: almost Wear-free

To economically convert nonwovens, composite materials and paper, continuous processes are necessary to provide high production speeds, maximum precision, short setup times, minimum wear and low defect rates. Conventional heat sealing and gluing technologies do not meet these requirements.

NON-CONTACT/NON-WEAR Technology

When processing nonwovens and composite materials, conventional ultrasonic technology cannot meet the necessary weld quality and repeatability requirements. Herrmann Ultrasonics provides a patented system tailored to these applications. The basic principle is a rigid mounted converter/booster/horn stack assembly, which can be precisely positioned in reference to an anvil drum. A constant gap between the weld horn and the anvil drum is automatically maintained and can be adjusted to the specific application.

Ultrasonics offer decisive advantages for processing of nonwovens and composite materials:

Consistent material characteristics--bonding and cutting with ultrasonics eliminates thermal degradation of the materials.
Ultrasonic laminating allows joining of materials with different melt temperatures.
Ultrasonically bonded materials can be easily recycled. No glue or other consumables are used.
Consistent weld quality is achieved even with different layers of material or when bonding in cross direction.
Increased efficiency as a result of minimized scrap during machine start-up, reduced down time, no heat-up wait period and reduced energy consumption.
High processing speeds are achievable because bonding, cutting, and perforating are possible in one step, even simultaneously in length and cross direction.