Process for Introducing a Weakening Line Through Material Removal on a Fibrous Coating Material, in Particular Natural Leather

摘要

Method for introducing a line of weakness through removal of material at a fibrous covering material, in particular a natural leather, in which a pulsed laser beam is guided a plurality of times over the back side in a line-shaped manner, wherein only one laser pulse is emitted for each impingement point, and the laser pulse causes an input of energy which leads to a heating of the fibrous covering material at the impingement point to a temperature above an ablation threshold and which maintains the temperature below a limit temperature in regions of the covering material adjoining the impingement point.

主权项

1. Method for introducing a defined line of weakness through removal of material at a fibrous covering material having a visible side and a back side opposite the visible side, comprising directing a pulsed laser beam to the back side and guiding said laser beam in a line-shaped manner, wherein a depth of a line of weakness that is formed in so doing is in part determined at impingement points of the laser beam along a line by a plurality of laser pulses, said line-shaped guiding being a multiple repetition of a scanning movement in which only one laser pulse is emitted for each impingement point along the line, said laser pulse causing an input of energy which leads at the respective impingement point to a heating of the fibrous covering material to a temperature above an ablation threshold and which maintains in regions of the fibrous covering material adjoining the impingement point a temperature below a limit temperature that would result in changes in the structure of the fibrous covering material.