Our PTFE heat-shrinkable tubing with a shrinkage ratio of 4:1 covers object diameters from 0.80-65.00mm as standard. Apart from the standard dimensions, which are usually available in stock at short notice, we also manufacture customer-specific versions in terms of geometry, colour or finishing.
Please contact us for individual solutions. These can usually be implemented promptly and effectively.
| Type | Expanded I. D. (mm) | Shrunk I.D. (mm) | Wall thickness after max. Shrinkage (mm) | Tol. Wall thickness (+/-mm) | Rec. Object diameter | (mm) item. Number |
| 5/64“ | 1,98 | 0,64 | 0,22 | 0,05 | 0,80-1,80 | 33450198006401 |
| 1/8“ | 3,18 | 0,94 | 0,25 | 0,05 | 1,10-3,00 | 33450318009401 |
| 3/16“ | 4,75 | 1,27 | 0,30 | 0,08 | 1,45-4,40 | 33450475012701 |
| ¼“ | 6,35 | 1,60 | 0,30 | 0,08 | 1,90-6,00 | 33450635016001 |
| 5/16“ | 7,92 | 2,00 | 0,30 | 0,08 | 2,40-7,60 | 33450792020001 |
| 3/8“ | 9,52 | 2,44 | 0,30 | 0,08 | 2,90-9,00 | 33450952024401 |
| 7/16“ | 11,13 | 2,85 | 0,30 | 0,08 | 3,40-10,60 | 33451113028501 |
| ½“ | 12,70 | 3,66 | 0,38 | 0,10 | 4,50-11,50 | 33451270036601 |
| 9/16“ | 14,27 | 3,94 | 0,38 | 0,10 | 5,50-12,00 | 33451427039401 |
| 5/8“ | 15,88 | 4,52 | 0,38 | 0,10 | 6,00-13,50 | 33451588045201 |
| 11/16“ | 17,75 | 5,03 | 0,38 | 0,10 | 7,00-15,00 | 33451775050301 |
| ¾“ | 19,05 | 5,70 | 0,38 | 0,10 | 7,50-17,00 | 33451905057001 |
| 7/8“ | 22,23 | 6,20 | 0,38 | 0,10 | 8,00-20,00 | 33452223062001 |
| 1“ | 25,40 | 7,06 | 0,38 | 0,10 | 9,55-22,50 | 33452540070601 |
| 1 ¼“ | 31,75 | 8,82 | 0,38 | 0,10 | 11,20-28,00 | 33453175088201 |
| 1 ½“ | 38,10 | 10,20 | 0,38 | 0,10 | 12,50-34,00 | 33453810102001 |
| 1 ¾“ | 44,45 | 11,43 | 0,38 | 0,10 | 13,50-40,00 | 33454445114301 |
| 2“ | 50,80 | 13,20 | 0,50 | 0,13 | 15,00-46,00 | 33455080132001 |
| 2 ¼“ | 57,15 | 14,85 | 0,50 | 0,13 | 16,50-53,00 | 33455715148501 |
| 2 ½“ | 63,50 | 16,50 | 0,50 | 0,13 | 19,00-59,00 | 33456350165001 |
| 2 ¾“ | 69,85 | 18,00 | 0,50 | 0,13 | 21,00-65,00 | 33456985180001 |
Avoid temperatures above 330°C during processing. The decomposition temperature of PTFE is reached at this point. Fluoropolymer fever and other secondary manifestations are possible. Process PTFE heat-shrinkable tubing only when a suitable exhaust system is in place.
The optimum processing window for our PTFE heat- shrinkable tubing is between 330°C and 380°C. The optimum temperature is reached when the heat-shrinkable tubing starts decreasing in size and the colour changes from slightly “milky” to completely transparent.
If temperature is applied to the heat-shrinkable tubing from the outside, the heat-shrinkable tubing isolates the temperature from the object. In this case, the object is too cold and cools the heat-shrinkable tubing from the inside. Consequently, it does not fit tightly onto the object.
The heating should be continued for a longer period of time in order to heat up the processed object accordingly.
Any visible waves that appear on the shrunken object are usually air inclusions. The best way to avoid this is to reduce the temperature and at the same time increase the exposure time. If this does not prove effective, the shrinking process should be initiated from the centre of the processed object. Start from the centre and proceed to both sides. This will force excess air out to the ends.
In the event that waves persist, it is possible that the contracted object is “outgassing”. In this case, replace with FEP heat-shrinkable tubing, which can be processed at a much lower temperature.
The polymer is soft and fragile throughout the shrinking process. The heat-shrinkable tubing may crack if the objects are very sharp-edged. The same applies to selective overheating in the course of the shrinking process. If the product is subject to repeated damage, try using the next larger size. In many cases, the problem will resolve itself.
However, please do not hesitate to contact us if you have any problems with the application of our heat-shrinkable tubing. It is also possible to provide your products with a coating in our company.