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A new spray system developed for the application of foamed adhesives for tissue or towel lamination is now available multi-ply tissue manufacturers can now effectively preserve tactile properties and virtually prevent the occurrence of ply mismatch. The patented PlyAble Tissue Lamination System uses unique spray technology to precisely apply foamed adhesives to tissue or towel lamination. This innovative technology jointly developed by Spraying Systems Co. and H.B. Fuller Company is designed to replace knurling wheels hot-melt or water-based adhesive systems and provides better tissue bonding using less adhesive. By leveraging H.B. Fullers micro foaming PlyABLE adhesive the patented application process uses a proprietary nozzle to reduce saturation whilst maximising bond strength and reducing waste. The PlyAbleTissue Lamination Spray Systems and Self-Cleaning Header Spray Systems are fully automated systems including cleaning cycles that can eliminate clogging and ensure optimal performance. They are ideal for applying adhesives lotions brighteners scents antimicrobials and other additives to personal care items such as tissue and hygienic products. The PlyAble Tissue Lamination System automatically cleans nozzles in place to ensure clog- free performance thus eliminating the excessive maintenance time required for conventional systems. Between parent roll changes the By Dave Kouwe Marketing Director Spraying Systems Co. Better tissue bonding whilst using less adhesive is now achievable multi-ply tissue manufacturers can now effectively preserve tactile properties and virtually prevent the occurrence of ply mismatch exteriors of the air atomising nozzles are cleaned by full cone nozzles mounted inside the header to remove buildup. Water is then passed through the air passages that feed the nozzles to ensure unobstructed air flow. The cleaning cycle is then repeated a second time Figure 1. The system uses an Allen Bradley PLC-based spray controller with HMI touchscreen to provide closed-loop flow control. As your line speed changes spray volume is automatically adjusted to ensure maximum bond strength. to remove any remaining residue. It is programmable and typically lasts 30 to 60 seconds. It can be programmed to run during unscheduled stoppages such as sheet breaks and should it prove necessary the cleaning cycle can also be triggered manually. Figure 2. Special nozzles optimise foaming and reduce bearding. Plate-mounting allows quick and easy removal from the header. Fluid and air passages are flushed during cleaning cycles. The nozzle on the left is used for starch-based adhesives and the nozzle on the right is typically used for PVA-based adhesives. TISSUE LAMINATION SYSTEMS WORLD PULPPAPER82