15% from the minimum expanded inside diameter.
Whenever very high radial shrinkage (up to 50% or more) is required, the "Drawing Process" can be used. This simply requires axial tension and stretching of the tube while it is being heated. Over 50% diameter reduction can be achieved at temperatures below 100°C (212°F). Higher diameter reductions can be achieved at higher temperatures, up to about 190°C (374°F).
4. Does the tubing shrink axially? 10. What lengths are available?
Standard length is 50" min.
Maximum straight length 96" - longer lengths are possible for some sizes.
Custom cutting as short as 0.020" or less.
Cryogenic to 125° C; Short term up to 200° C
18. What causes pin-holes in the shrink tubing?
A number of things can cause pin-holes in the shrink tubing. The damage is typically related to sharp objects, mishandling or overheating. Proper handling of the tubing is the key. First of all, the product that is being covered must be completely de-burred and not have any sharp edges. Secondly, care must be taken when placing the shrink tubing over the product as well as moving the product through a heat source and/or removal from an oven. Damage can also occur if the covered product accidentally comes in contact with a sharp object. Additionally, subjecting the product to temperatures above the melting temperature of PET can cause holes or splits.
19. How do I minimize axial shrinkage?
By either choosing a tubing size that more closely fits on to the product to be covered (start with a small tube size) or hold/restrain the ends of the tube during the shrinking process to prevent the tube from shrinking in length.
