Process for producing web sections from a flexible web material as well as for producing packing containers

A process for producing web sections from a flexible web material, wherein:

• the web material is provided with tear-off lines extending across an entire width of the web material at the distance of the length (L) of the web sections to be formed, which tear-off lines weaken the web material but do not bring about a complete separation of the web sections from the web material,
• the web sections are separated from the web material along the tear-off lines by tearing,
• the web material is a fabric made of small stretched plastic bands and that the tear-off lines are produced by laser beam processing, and
• the process comprises:
• guiding a laser beam through a scanner unit along the predefined outline of the tear-off line, and
• when the laser beam is being guided along the predefined outline of the tear-off line, altering the laser energy of the laser beam according to the intended penetration depths into the web material, wherein the power of the laser source is adjusted depending on the relative speed of the laser beam with respect to the web material or that, for achieving a desired penetration depth, the relative speed of the laser beam is adjusted with respect to the web material.