Packaging materials and processes for producing packaging materials.

摘要

The disclosure relates to a process for producing twin or multiply corrugated medium in which a first ply (2) is provided from a feeder reel (1) and is fed to a compact and lightweight spray station (3) where adhesive is sprayed onto one surface of the ply. A second ply (4) is supplied from a second feeder reel (5) and one surface of the second ply is brought into contact with the sprayed surface of the first ply and is bonded thereto. The resulting double ply is corrugated in a corrugator (6). The adhesive used is required to set during the corrugation process which can readily be arranged because the compact and lightweight spray station can be positioned immediately adjacent the corrugates.