METHOD FOR MONITORING THE QUALITY OF AN ADHESIVE APPLICATION DURING A LAMINATION PROCESS

摘要

A method for monitoring the quality of an adhesive application during a lamination process for manufacturing a packaging laminate includes conveying a first film or foil web in a longitudinal direction, applying an adhesive material over the whole surface or in a pattern onto the moving first film or foil web and applying a second film or foil web onto the adhesive coated first film or foil web and conveying the first and second film or foil web having the intermediate deposited adhesive material layer in the longitudinal direction to a pressing station to form a laminate. A fluorescent agent may be added to and intermixed with the adhesive material such that the fluorescent agent is uniformly distributed. Fluorescence radiation emitted by an ultraviolet-exposed adhesive material layer is detected by a visual inspection system.

主权项

1. A method for monitoring the quality of an adhesive application during a lamination process for manufacturing a packaging laminate, comprising:
conveying a first film or foil web in a longitudinal direction; applying an adhesive material as an adhesive material layer over the whole surface or in a pattern onto the moving first film or foil web and applying a second film or foil web onto the adhesive coated first film or foil web and conveying said first and second film or foil web comprising the intermediate deposited adhesive material layer in the longitudinal direction to a pressing station to form a laminate, wherein a fluorescent agent is added to and intermixed with the adhesive material such that an adhesive material comprising a uniformly distributed fluorescent agent is provided before the adhesive material is deposited onto the first film or foil web wherein the fluorescent agent is chosen from those that absorb ultraviolet light and emit light in the visible spectrum, wherein a predefined area of the adhesive coated first film or foil web is exposed to ultraviolet radiation, and wherein the resulting fluorescence radiation emitted by the uv-exposed adhesive material layer is detected by a visual inspection system adapted to monitor the quality and homogeneity of the adhesive material layer.