Strengthening film carrier bags - by applying strips coated one side with hot melt adhesive by festooning and passing over bottom of doctored roller with adhesive tank on top

摘要

Plastic carrier bags are produced with glued-on reinforcing strips by passing plastic film over a revolving glue-coating roller; the film coated on the one side, continuous or as individual lengths, is laid on to a double-layer film, the double film is punched to have grip holes, and it is finally welded and sepd. into the individual bags. The coating rubber is fed with a high viscosity adhesive based on synthetic rubber/a hydrocarbon resin; the film concerned is passed underneath the coating roller so as to be in contact with the two lowest quarters of the roller circumference. ADVANTAGE - The film web does not become drawn into the bath of adhesive (as happens with previous comparable processes).