Mechanical Greaseproof Paper Grade Selection for Bakeries and Fast Food Packaging
Optimize mechanical greaseproof paper selection by specifying 80-88 SR refining and 15000+ s Gurley porosity to secure non-PFAS grease resistance.
DIN 53116 Pinhole Test
Permeability Specification
Quantitative assessment determines the barrier effectiveness of packaging materials by detecting microscopic holes that allow light transmission. The din 53116 pinhole test provides a standardized procedure to identify flaws in foils, coated papers, or laminates that could compromise product integrity. A specimen is mounted against a high intensity light source while the opposite side is inspected for glowing apertures.
Automated systems scan the surface to quantify the density and size of these transmission points per square meter of the material. This measurement defines the upper limit of defect frequency acceptable for sensitive applications like food preservation or pharmaceutical unit packaging.
Material Performance
Integrity in barrier layers relies on the absence of structural discontinuities that develop during manufacturing or downstream converting operations. The din 53116 pinhole test monitors the efficiency of coating application processes and substrate uniformity. High quality metalized films or extruded barrier resins aim for zero count readings under specific illumination settings.
Mechanical strain such as folding or heavy creasing often induces fractures that this procedure captures as an increase in total transmission points. Printers and laminators utilize these detection results to calibrate tension settings or adjust doctor blade pressures to prevent surface damage.
Process Control
Defect classification differentiates between inherent production flaws and those occurring after the substrate exits the machine. Continuous monitoring allows manufacturers to maintain consistency across large master rolls destined for high speed filling lines. A sudden rise in the count often indicates machine components requiring maintenance or raw materials failing to meet surface quality requirements.
Accurate detection provides a objective baseline for quality agreements between substrate producers and end users. This metric defines the inherent barrier failure rate of a specific film batch.