ALU Blister

Foils – Aluminium blister

Aluminium is a common, albeit expensive, material for blisters. However, these offer the greatest safety for the patient, as they almost completely prevent the penetration of water vapour, air and light as well as heat. Particularly sensitive active ingredients are thus optimally protected from external exposure.

Material-specific challenges

Product features

The aluminium is formed by pressure without heat. Therefore, no 90° angles are possible – the cups are correspondingly larger than in PVC blisters, with the same size medicine. In addition, pores can occur in the material during the moulding process, but also deformations during the filling process.

Recommended inspection systems for aluminium blisters

To ensure material safety, the film can be inspected for micro-cracks before or after forming. The correct shaping of the cups can also be checked in 3D.

Highlights of the PATERA FOCON Pinhole Detection

  • Optoelectronic detection of pores and cracks in aluminium foil up to 1,000 mm wide, flat or formed
  • Speeds of 1.5 m/s
  • Detection range of 25, 50, 100, 250 or 500 μm
  • Fill suppression reduces production waste and thus saves costs
  • Available in widths from 200 to 1,000 mm
  • Multilingual display

Highlights of the three-dimensional inspection SPECTRA 3D

  • High-resolution, laser-based vision system for the inspection of blister geometry
  • The geometry of the objects to be inspected is illuminated by a laser. The resulting image is captured by a high-resolution 3D line scan camera. The camera image is processed and digitised. The digital signal is then processed and evaluated.
  • The evaluation is displayed in 3D or colour layers.
  • Evaluation speed 450 in images per minute (at 1000 lines)
  • Camera resolution 1,536 pixels per line
  • Height resolution 0.05mm in 128 grey levels height
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Further foils from scanware

The quality of sealing foil is inspected at high speed - even for wide foils.

Deformations in filled PVC blisters are detected before sealing.

The printing of entire film widths is inspected at high speed.