Textile finishing in classic dip tanks requires large amounts of drying energy due to the immense water volumes used in the dipping process, which often lead to high water loads in the dryer. In contrast to this, spray application offers precise and minimal dosage, saving energy, water and chemicals, and enabling the one-sided or even double-sided bi-functional finishing of textiles and tiles.
In many cases, an upstream corona pre-treatment offers particular advantages, since it leads to the quicker and more even absorption of spray chemicals on certain substrates. Until now, however, such systems have not been available from one single source. This led Ahlbrandt System GmbH to develop the Web Process Line, a complete solution from a single source that combines the components of corona pretreatment, spray application and drying. It works with the proven corona technology, allows an extremely thin, water-based spray application and dries streak-free. This makes this new process more energy-efficient, more resource-saving and financially more economical than processing the substrate in a dip tank.
Ahlbrandt has designed the Web Process Line so that only water-based chemicals are processed. These are atomized via several rotors arranged in parallel and are applied evenly onto textiles or fleece. This special arrangement produces overlapping spraying fields that guarantee an even and highly effective application.
The spraying volume is automatically dosed and is adapted to the web speed, resulting in a minimum amount of chemicals and drying energy being required. Subsequently, the spray application is dried with hot air. This is done streak-free for up to six meters of substrate width, which makes the drying process energy efficient and resource saving.
The dryer can also be equipped with additional infrared radiators, which enables quicker material heating with thicker fabrics, thus reducing the time required in the dryer. The system is individually configured in close collaboration with the customer.