Protective masks made with polymer-based materials

A method of forming an interlaced structure of polymer-based materials, comprising:

• applying adhesive to a substrate;
• electrospinning a first polymer solution onto said substrate from a first group of spinning electrodes;
• electrospinning a second polymer solution onto said substrate from a second group of spinning electrodes, wherein said first group of spinning electrodes and said second group of spinning electrodes are located adjacent to each other, and
• applying hot air to dry the polymer-based materials electrospun from said first polymer solution and said second polymer solution;
• wherein throughout the whole process, said substrate moves in a direction from the first group of spinning electrodes to the second group of spinning electrodes such that a layer of fibers from the first polymer solution is formed on said substrate and a layer of fibers from the second polymer solution is formed on said layer of fibers from the first polymer;
• whereby an interlaced structure comprising the fibers from the first polymer solution and the fibers from the second polymer solution is formed between the layer of fibers from the first polymer solution and the layer of fibers from the second polymer solution.