Electrospinning method

A method of electrospinning comprising:

• (i) holding a liquid comprising a polymer melt or a polymer solution in a container;
• (ii) letting out a stream of the liquid from the container through at least one nozzle;
• (iii) creating a voltage difference between the nozzle and a collecting surface;
• (iv) collecting electro spun material coming from the nozzle so as to form a fibrous structure on the collecting surface;
• (v) directing a laser beam towards the collecting surface so as to locally remove a part of the fibrous structure;
• (vi) interrupting the laser beam for a moment;
• and
• (vii) directing the laser beam towards the collecting surface again so as to locally remove another part of the fibrous structure,
• wherein steps (vi) and (vii) are repeated to create a pattern of separated holes in the fibrous structure, and
• wherein the pattern of separated holes in the fibrous structure is created in such a way that a directional stiffness is created in the fibrous structure.