Features: 1. Adjustable temperature, width, speed and roll prussure to fit different size material. 2. Hot Air can be controlled within ±1℃ to ensure the welding quality. 3. The upper and lower roller can feed the material synchronously to prevent any malposition of the two layers of cloth. Application: Material: polyester, acrylic, PPS, polyurethane, rubber Max Speed 8-16m/min Seam Width 15mm (adjustable) Material Thickness 0.5-2mm Power 4kw Air Temperature max. 640℃