Profiled protective tape for rotor blades of wind turbine generators

Process of forming a multilayer tape (1) comprising:

• (i) providing a substrate (4);
• (ii) providing in a coating chamber (6) a coating knife (300) having a profiled recess (301) at its lower end facing the substrate (4) and which forms a gap (401) normal to the surface of the substrate (4);
• (iii) moving the substrate (4) relative to the coating knive (300) in a downstream direction;
• (iv) providing to the upstream side of the coating knife (300) a curable adhesive thereby coating an adhesive layer (3) onto the substrate (4) through the gap (401);
• (v) providing a polymer film (2) to the upstream side of the coating knife (300) and feeding the film (2) simultaneously with the adhesive layer (3) through the recess (301) of the coating knife (300), wherein the film (2) is positioned between the recess (301) and the adhesive layer (3);
• (vi) curing the adhesive of the multilayer tape thus obtained, wherein the profiled recess (301) of the coating knife (300) and the size of the gap (400) between the coating knife (300) and the substrate (4) define the cross-sectional profile of the tape (1).