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Polytetrafluoroethylene (PTFE) Heat Shrink Tubing


Description of Polytetrafluoroethylene (PTFE) Heat Shrink Tubing

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Whether you are working on a complex application or a simple solution, you can rely on PTFE heat shrink which has been designed into products like advanced medical devices and high temperature industrial equipment.

Polytetrafluoroethylene heat shrink tubing has the lowest coefficient of friction any polymer has ever seen and offers a wide working temperature range. Used in the chemical and analytical sciences industries because of its high chemical resistance and unparalleled chemical inertness, PTFE has become the plastic of choice.

*Sold by the Foot.

*Maximum 4 Ft continuous length for this product.

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Features and Benefits

  • Ideal for military applications, able to withstand high continuous temperature range from -454F to 500F (-270C to 260C)
  • Offers high chemical resistance and reduced friction rating
  • Adheres to MIL-I-23053/12 specifications and flame rating for both UL940 and VW-1
  • Resistant to aggressive chemicals except alkali metals in molten state, fluorine gas at high temperatures and chlorine triflouride
  • Good dielectric strength for durability and insulation
  • Comes in Natural color for visibility
  • Very Lubricious with a low coefficient of friction
  • Available in 2:1 shrink ratio and 4:1 shrink ratio
  • Cleans with ease
  • Works well under severe conditions
  • Approved for both FDA and USP Class VI
  • Has a limiting oxygen index greater than 95
  • ETO and autoclave sterilizable

More Info

Property ASTM Typical Value
Tensile Strength D638 2500 psi (17,3 Mpa) 2 inches/mm
Specific Gravity D792 2.2
Elongation D2671 200%, 2 inches/mm
Longitudinal Change - 20%
Water Absorption D570 <0.01%
Fungus Resistance - No growth
Corrosion - Non corrosive
Fluid resistance - No change
Dielectric Strength
Volts/mil (Kv/mm)
Mininum
D2671 800 (31,1)
Volume Resistivity D876 >1018 ohm-cm
Voltage Withstand - Pass (350 4C, 662 7.2F), 5 mn
Continuous Service Temperature - -88F (-67C) to +482 F (+250C)
Storage Temperature - 18 to 35C(65 to 95F) for 4 years
Melting Point - +635 to +650F
Heat Shock - No cracks, flowing or dripping (400 5C, 752 9F
Restricted Shrinkage - Pass (350 4C, 662 7.2F), 5 mn
Low Temperature Flexibility - No cracking (-65 2C, -85 4F)
Flammability - Non Flammable
Flammability Rating UL94 V0

PTFE heat shrink tubing is part of the fluoropolymer material family and is very difficult to shrink due to high shrink temperature at 325 340C. If using a heat gun or welding torch to shrink the heat shrink, the material can overheat in some areas and under-heat in others which can cause uneven shrinking and possibly burning of the material. If you are looking for a reliable way to shrink PTFE, use a controlled temperature oven however, when attached to large harnesses or temperature sensitive components, this can be difficult.

PTFE heat shrink comes in 2:1 and 4:1 shrink ratios often used in military applications due to its adherence to MIL spec MIL-I-23053/12 and because it has a high continuous use temperature of 250C and strong chemical resistance.

When shrinking PTFE, make sure you have good ventilation in your area of work this is in order to ensure human safety as fumes may cause nausea and/or dizziness. The tubing has to be heated uniformly until it becomes clear in color this is what is known as the gel state be sure to preheat the controlled temperature oven before shrinking to ensure uniform shrinkage. Cracked PTFE suggests that the material has been overheated.

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