Cold Foil Register Drift as the Stack Warms across a Shift
Stack thermal buildup causes substrate shrinkage and mechanical expansion, driving cold foil register drift across continuous production shifts.
Dynamic Shear Resistance
Shear Force
Adhesion strength under rapid sliding forces determines the structural integrity of double-sided tapes used in corrugated board splicing. The dynamic shear resistance of an adhesive tape measures its ability to withstand forces that act parallel to the joint during high speed processing. Splicing tapes must hold the moving webs securely without slipping under the sudden tension changes of the manufacturing line.
High web speeds generate large parallel forces that try to pull the joint apart.
Splice Stability
High mechanical stresses are exerted on paper splices as they pass through the tension rolls and heating sections of the corrugator. If the adhesive lacks sufficient shear strength, the splice can fail, causing a web break that halts the entire production line. Splicing failures result in costly waste and machine downtime.
Selecting an adhesive tape with high shear resistance ensures that the splice remains intact during these high temperature and high tension phases.
Test Method
Testing of this property involves pulling a lap joint of tape and paperboard in a tensile tester until the bond fails. The test records the maximum force required to cause shear failure under a constant rate of extension. This measurement helps converters choose the right tape.