Surface Energy Measurement Methods for Polyolefin Packaging Films
Polyolefin surface energy audits require OWRK polar component tracking and dyne fluid validation to prevent lamination delamination and slip agent masking.
Tape Adhesion Astm D3359
Coating Evaluation
Mechanical tests that evaluate the coating bond through cross cut incisions measure the durability of inks on rigid substrates. The implementation of tape adhesion ASTM D3359 involves cutting a lattice pattern into the coating, applying a pressure-sensitive tape, and removing it rapidly. This process provides a qualitative assessment of the coating’s bond to the substrate, classified on a scale from 0B to 5B.
This evaluation is critical for ensuring that printed designs do not peel or flake during handling and distribution.
Test Execution
Multi-blade cutters are used to create a series of parallel cuts through the coating to the substrate, followed by a second set of perpendicular cuts. The operator applies a specified adhesive tape over the cross-cut area, rubs it firmly to ensure good contact, and then pulls it off at an angle close to 180 degrees. The grid area is then inspected under illumination to assess the percentage of coating removed.
This visual comparison provides a quick way to verify coating integrity.
Adhesion Quality
Poor tape adhesion results from inadequate surface treatment or incorrect ink curing. If the coating lifts off with the tape, it indicates a weak interfacial bond that could lead to failure in the field. This testing method is widely used in quality control laboratories to monitor the performance of printed packaging materials.