Molding strip and improved formation method

A molding device configured to form a retaining device comprising a base provided with one or more of a plurality of retaining elements and preforms of retaining elements, the molding device comprising:

• a molding strip formed of a first material and adapted to be mounted on a support, the molding strip extending along a machine direction, having a width defined along a transverse direction perpendicular to the machine direction, and a thickness measured along a direction perpendicular to the machine direction and to the transverse direction, the molding strip having an inner face and an outer face, and the molding strip comprising a plurality of cavities,
• wherein part of the cavities are at least partially obturated with a plugging material, so as to define molding cavities configured to form one or more of retaining elements and preforms of retaining elements, and non-functional cavities.

A method for preparing a molding device comprising:

• providing a molding strip formed of a first material and adapted to be mounted on a support, the molding strip extending along a machine direction, having a width defined along a transverse direction perpendicular to the machine direction, and a thickness along a direction perpendicular to the machine direction and to the transverse direction, the molding strip having an inner face and an outer face, and the molding strip comprising a plurality of cavities;
• and
• applying a plugging material on the molding strip so as to obturate at least part of the cavities of the molding strip.