Smithers Pira can locate pinholes in flexible films using a range of vacuum, gas detection, optical, porosity and dye penetration techniques to corresponding standards.
Pinholes in packaging films may result from the material conversion process or subsequent manual handling and transit of the primary packaging. Damage mechanisms include abrasion; flex cracking, snagging and puncture.
Standards and Accreditation
All test methods adhere to British and International standard BS EN 868-1 for which Smithers Pira is UKAS, ISO 17025 accredited.
Pinhole Testing and Pack Integrity
The size of pinholes or micro-perforations can be determined either by optical microscopy or an aggregate hole-size determined for a pack using a pressure decay pack integrity method.