|
 Manufactured
from a variety of polymers, heat shrink tubings are used for
product and manufacturing applications including electrical
insulation, mechanical reinforcement, encapsulation, marking
and identification. They are available in standard or long
continuous lengths and in precision cut pieces.
Factors
in selecting the proper tubing include usage and shrink temperature,
electrical insulation requirements, biocompatibility, mechanical
properties, shrink ratio and cost. While the chart below summarizes
some of these properties, please contact your local rep to
review your application and get samples. All values are typical
and come from published sources. You must conduct your own
testing to determine the suitability of these materials for
your application.
|
Polymer
|
Shrinkage
Temperature
|
Dielectric
Strength
|
Max
Shrink Ratio
|
Specs*
|
| PTFE |
675
F |
>1,400
volts/mil
|
4:1 |
1,
2, 3, 4 |
| FEP |
425
F |
>2,000
volts/mil
|
1.67:1 |
1,
2, 3, 4 |
| PET
(solid tubing) |
175-350
F |
>5,000
volts/mil
|
1.25:1 |
1,
3 |
| Polyolefin |
121
C |
>1,300
volts/mil
|
3:1 |
1,
2, 3, 4 |
| PET
(spiral wound) |
175-350
F |
>1,500
volts/mil
|
2:1 |
2,
3, 4 |
| LDPE
|
mid-100’s |
450
- 1,000 volts/mil |
custom
|
1
|
| PVC |
200
F |
>1,000
volts/mil
|
2:1 |
1,
2, 3, 4 |
| PVC
layflat
|
200
F |
>1,000
volts/mil
|
2:1 |
2,
3, 4 |
| Kynar™ |
350
F |
>1,000
volts/mil
|
2:1 |
1,
2, 3, 4 |
| Viton™ |
175
C |
>500
volts/mil
|
2:1 |
3,
4 |
*Specification
Code: (1) U.S.P.. Class VI (2) UL/CSA listed (3) UL Flame
resistant or retardant (4) Mil-Spec compliance (contact
us for specifics)
While
heat shrink tubings serve many different purposes, at times
the use of a tight tolerance extrusion, direct surface coating,
coextrusion, material substitution or some other approach
will result in cost reductions. We would be happy to review
any of these options with you.
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