The manufacturing process is designated as a "DOUBLE BUBBLE" Process.

The first phase is the extrusion of polymer in a descending direction through a die (3 layers) which forms a primary tube, that is immediately cooled.

The primary tube is then conveyed to the top of the orientation tower.

At the top of the tower the primary tube is drawn in a downward direction and at the same time the tube is heated to a temperature just below the melt point. Air pressure is introduced expanding the tube to the gauge required. The biaxial orientation takes place as the tube is expanded and the downward speed is accelerated.

After this operation, the bubble is collapsed between two sets of rollers. The resulting flat sheets are then cut and rewound onto master rolls.

The master rolls are stored for use as required by the "Finishing Dept".