Open-ended sleeve for laser read disc record folded from paper blank

摘要

The open-ended sleeve for holding a disc record playable by laser pickup is folded from a paper blank having front and rear panel connected via a fold line and one panel provided with adhesive lateral fold flaps. The inner surface of the paper blank has its entire area provided with a 15-30 micron thick plastic coating whilst the pressure-sensitive or hot-melt adhesive does not contain solvent or plasticiser. The coating may consist of polyethene directly extruded on to the paper or of polythene or polypropylene laminated thereon with interposed adhesive poly-urethane layer with 3-4 g/m2 thickness.