shrink wrap how?

Intertape uses multiple extruders to feed into one die. The resin from each of these extruders is then layered over one another as the melt exits the die. This results in a multilayered product.

The extruded structure in the form of a tube is then turned upward, then back downward and filled with air. This process converts the tube into a bubble. This bubble is then stretched on both axis, horizontally by the air flow and vertically by means of a set of pinch rollers drawing the tube down. The act of stretching the film tube on both axis is known as bi-axial orientation. A bi-axial orientation gives the film many of the required strengths of a shrink film.

The pinch rollers collapse the bubble into sheet form where it is then rolled onto a core. This roll of material is called a mill log.

The mill logs are then converted into the finished product. Conversion entails slitting of the film to width and folding in the case of centerfold film. Preperforation is completed during this conversion process.

Shrink wrap related links:

• Shrink Wrap 101 - Shrink Film Buyers Guide
• Shrink Film Packaging - Polyolefin Shrink Films
• Clearance ShrinkWrap Discounted Shrink Wrap
• Shrink Wrap Machines Shrink wrap dispensers and packaging equipment