Textiles and non-wovens
Hydrophilic or hydrophobic.
Textiles and non-wovens are usually made of woven or spun fibres. The materials are wool, cotton and synthetic fibres. The corona treatment therefore does not take place on a homogeneous surface, but on a variety of surfaces contained within the web.
The aim of the treatment is to improve the absorbency. How effective the treatment is you can tell by how quickly a drop of liquid is absorbed.
The corona treatment must be carried out gently in order not to thermally damage the individual filaments, but intense enough to activate hard to treat synthetic fibres.
This creates the prerequisite for further process steps. Specific coatings adhere and provide a wide range of properties, i.e. flame retardent or water repellent.