Ultrasound is the name given for sound waves that have a frequency that is higher than the upper limits of human hearing. It is no different from the normal sound waves that we can hear as noise in day to day life. The only difference is that we as humans cannot hear them.
Ultrasound equipment can be used for many different technological devices. From detecting objects to measuring distances, cleaning and so much more. The ultrasound that so many pregnant mothers receive to check the progress of their baby is a prime example of using sound waves to detect and view objects through surfaces.
At Ardmel, we have developed ultrasonic soundwave technology and incorporated it into our award winning range of Cutting & Sewing/Bonding Machines which you can view from this link
The results of applying ultrasonic technology to textile and garment fabrics in the form of both ultrasonic ‘welding’ and cutting has allowed Ardmel to lead the way in this field of technology and innovation, developing ultrasonic machines tailored for garment construction with stitchless seams and precise cutting that is far superior to laser cutting.
The high frequency ultrasonic acoustic vibrations of ultrasonic welding can weld under high pressure to create solid-state welds using a frequency commonly in the region of 20 – 40kHz (dependent on the textiles being used).
While the traditional needle and thread sewing machines are and always will be a common site in clothing factories around the world, ultrasonic welding is proving to be a superior alternative in so many clothing sectors including sportswear and outdoor clothing. On traditional sewing machines, the needle punctures holes into the fabric, weakening its structure while the overlap of fabrics at the joint creates thick seams that are bulky, can restrict movement, are wasteful and adds weight to the garment. A multitude of negatives in the sportswear market. With our ultrasonic sewing machines, we can create a weld so small that it has to be backed with a seam sealing tape. Our standard weld created from an ultrasonic sewing machine is just 0.5mm!
There are a few requirements that have to be met for fabrics and textiles that are to be used in ultrasonic welding. A broad melting range with a high coefficient of friction are required while the fabric must have a consistent thickness throughout. In order to achieve the melting point that allows for ultrasonic bonding, the textile must have a 20% minimum thermoplastic content with sufficient strength within the material to withstand the welding process. As an example, polyester is a common and popular choice of fabric material used for ultrasonic welding and sewing.
If you would like to know more about our range of ultrasonic equipment and to discuss the benefits of using ultrasonic welding and cutting for your garment construction requirements, please contact our head office in Scotland where our engineers can answer any enquiry you may have.
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