The ability to "draw down" PET heat shrink tubing allows you to reduce tube diameter by up to 70% while maintaining a high-strength, thin-wall heat shrink tube.
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Unrestricted, PET heat shrink tubing will shrink both radially and axially. In most cases, the best overall performance comes with minimal shrinkage (less than 15%&#;20%), except when the tube drawing process is used as described below, or unless you restrict axial shrinkage.
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You can restrict axial shrinkage by holding the ends of the heat shrink tube during the heating process to prevent the tube from shrinking in length. This will result in a heat shrink tube with radial shrinkage up to 50% or more, depending on temperature.
Wall thickness provided is the expanded wall thickness. Tubing will become slightly thicker during shrinking process.
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