Piezoelectric Sensor Frequency Response Calibration for Folding Boxboard Converting
Piezoelectric sensor frequency response calibration prevents amplitude distortion during high speed creasing by matching amplifier cutoff to rule strike transients.
Drop Ball Shock Test
Impact Evaluation
Standardized laboratory procedures measure the resistance of protective packaging materials and coatings to sudden concentrated forces. The drop ball shock test provides a method for assessing how well a coated paperboard or composite container resists localized cracking upon impact. During this evaluation, a steel ball of known mass falls from a pre-determined height onto the surface of the specimen.
Technicians then inspect the impacted area for visible fractures and delamination.
Coating Integrity
Specialized barrier boards used for food or pharmaceutical packaging must maintain their surface protection even when subjected to rough handling. Performing the drop ball shock test on these materials helps engineers determine if the protective polymer layer will detach or fracture under sudden mechanical load. Cracks in the barrier allow moisture or gases to penetrate the board, which spoils the packaged goods and compromises the shelf life.
The test also evaluates the adhesive bond between the paperboard substrate and the extruded plastic laminate. By adjusting the polymer blend or the substrate surface treatment, paper mills can optimize the board’s toughness to withstand these specific impact forces.
Standard Compliance
Quality assurance teams utilize these drop results to certify board grades for heavy-duty shipping containers. The repeatable nature of the drop ball shock test ensures consistent baseline evaluations across different manufacturing batches.