Ensures high quality bonding in terms of strength, precision and aesthetics. As opposed to technologies such as impulse and high frequency (HF), hot air welding does not produce any heat stress and only affects those sides of the material that are bonded together. Since the inner part of the fabric is not affected by the heat in any way, its physical and aesthetic properties remain intact. In combination with the patented Intelligent Torque, hot air welding technology avoids puckering of the fabric and fading or altering of the colors, and ensures seams of superior quality. The technology is commonly used on PVC or PVC coated fabrics and gives excellent results when used to weld glue coated zippers to fabrics or to apply glue tape to bond acrylic and polyester.
Hot melt (liquid glue)
Liquid glue technology is used in place of conventional sewing with needle and thread and guarantees incomparable strength, durability and aesthetical results when used on textiles like acrylic and polyester. Besides a significant aesthetical improvement, the liquid glue bonding process ensures waterproof seams since it does not puncture the fabrics (as happens with sewing needles). Tests carried out by independent laboratories show that liquid glue accounts for an increase in durability of up to 60% compared to traditional stitched seams.
SMRE was the first manufacturer in the world to develop a system to glue textiles for outdoor awnings. Today, our customers have welded more than 14 million meters of fabric, making our liquid glue system the undisputed champion in glue bonding of technical fabrics.
Liquid glue is suitable to bond uncoated acrylic and polyester fabrics. For Teflon coated and other hard-to-weld fabrics, a specifically developed system for polyurethane glue is available.
Intelligent Torque for digital fabric tension control
Besides the usual parameters installed in welding machines built by other manufacturers – speed of the welding head and of the wheels, temperature of the air or of the glue, pressure of the wheels on the fabric – SMRE added another parameter: Intelligent Torque.
Intelligent Torque is the force with which the wheels pull the processed fabric under tension during the welding cycle. Fabric tension is of fundamental importance to guarantee high quality seams. If the tension is too high, the fabric tends to stretch during the weld and shrink after the welding process, causing wrinkles in the seam. If the tension is not enough the fabric tends to run out of the guide, compromising the precision of the seam.
By digitally controlling the tension in the processed fabric, the patented Intelligent Torque technology guarantees seams of the highest quality, both aesthetically and in terms of strength.