Volumetric Imaging


Volumetric Imaging Technology

VeriPac UBV inspection system for multi-cavity blister packaging features tool-less changeover for different blister package formats

Blister package manufacturing consists of materials such as plastic or foil formed into cavities that house the tablets or capsules, providing the barrier against environmental contaminants for the product’s shelf-life. In the dye ingress test, the package is visually inspected for blue dye penetration after it has been subjected to a vacuum cycle submerged in dye. While the method seems simple, there are several conditional aspects to the method that can contribute to unreliable results and make the method less effective at assuring quality.

The VeriPac Universal Blister Verification (UBV) system is designed for non-destructive blister package leak detection. Using principles similar to those applied in a vacuum based dye ingress test, the UBV applies controlled inputs and measured outputs without the hassle and reliability issues of the dye ingress method. The UBV uses a volumetric imaging technology to measure the motion of a blister package under vacuum to detect leaks. The interface is practical and simple to setup with new blister package formats, requiring no tooling changeover or complex parameter adjustments experienced with other non-destructive blister package inspection systems.

The sample is placed on the inspection stage for vacuum based measurement. After pressing the start button, vacuum is pulled to a defined vacuum. The blisters expand under vacuum, driving air out of the blister through any leaks present. If there is a leak in the blister, the air escapes into the chamber leaving a collapsed blister package. During the dynamic vacuum test sequence, a volumetric measurement reading is taken which determines which blister cavities are defective. A definitive pass/fail result is displayed as well as the quantitative measurement associated with each package test. Like other VeriPac systems, the UBV provides a definitive result based on accurate and measurable quantitative data.

The test time to detect a small defect is rapid. At the end of the 10 second test time, the cavity has evacuated the air needed to provide a measurable difference between the non-leaking cavities and the leaker. The Volumetric Imaging solution developed by PTI provides a distinct quantitative measure of the blister cavity.

The universal nature of the system comes from its ability to adapt from one package format to the next. The system captures the volumetric data from each cavity, adapting to different cavity shapes, sizes and arrangements of different blister pack formats. The intelligent measurement adaption allows for testing different package formats with absolutely no change-over, making it the most simple and universal blister package inspection system.

The PTI VeriPac UBV is a non-destructive and completely tool-less blister pack seal integrity tester. The simplicity of the test method and reliability of the test result makes the UBV a tool to improve quality and production line efficiency. The volumetric imaging technology has proven test sensitivity down to 10 microns. Non-destructive testing provides a greater understanding of package quality while also reducing waste and tool-less operation provides easy changeover. Waste reduction delivers a fast return on investment and brings operations closer to green initiatives.

Benefits

  • Non-destructive technology
  • Accurate and repeatable results
  • Pass/fail results backed by quantitative test data
  • Completely tool-less
  • No changeover to test different blister formats
  • Identifies which cavity is defective
  • Eliminates destructive, subjective testing methods

Inspection Criteria

  • Leak detection and seal integrity testing of the entire package
  • Test sensitivity down to 10 microns
 
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