STRAIN VIEWER FOR PET PREFORMS (Ref. S-400)
Check PET Preforms for CRYSTALLINITY and other defects.
Strain Viewer with special Alignment Stage removed.
This Sharples Strain Viewer is already in worldwide use for the quality control of PET preforms.
The advantages of our PET preform Strain Viewer are : -
1. Crystallinity is readily identified.
2. Not only can the molecular birefringent flow lines (fringes) be seen in colour but the black isoclinic lines are visible when the preform axis are parallel to the polarising axis of the viewer. The isoclinic lines indicate the directions of the molecular orientational strains.
A special and removable stage is provided to rapidly
obtain the correct alignments
of the preforms when viewing.
Sodium light is also provided, in addition to white light, for the examination of coloured preforms or completed bottles. The lamphouse is fan cooled.
Viewing field:..............260 x 260mm
Overall size:...............445 x 280 x 280mm
Mains voltage:............220/240v or 110v
Preform strain pattern