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3/4" 1.6:1 FEP Heat Shrink Tubing (4ft/pc) - Clear (M23053/11-207-C)

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 Product Description

Fluorinated Ethylene Propylene (FEP) heat shrink tubing is a widely used, lower cost alternative to PTFE (Teflon). FEP is sometimes called Teflon (even though that is the wrong name for it). FEP has similar dielectric and frictional properties to PTFE. Although PTFE has superior chemical resistance to FEP, FEP can be used in most applications suited for PTFE. The major difference between the two materials is the continuous use temperature. FEP heat shrinkable tubing is suitable for continuous use at temperatures up to 204°C. FEP heat shrink conforms to Mil-I-23053/11, and UL 94 (V0, VW-1).

Another advantage FEP has over PTFE is its much lower shrink temperature. While PTFE needs a temperature of over 300°C to shrink it, FEP heat shrink can shrink as low as 190°C. This can be a significant advantage when used in conjunction with temperature sensitive components.

FEP is available in 1.6:1 and 1.3:1 shrink ratios.

  • Before shrinking ID Min: 0.750"
  • After shrinking ID Max: 0.450"
  • After shrinking Wall Thickness: 0.020"
  • Continuous operating temperature 400°F (204°C)
  • Outstanding chemical resistance is extreme environments.
  • FDA and USP Class VI approved
  • Lower gas permeability than PTFE
  • Increased translucence compared to PTFE
  • Excellent transmission of UV rays
  • Excellent electrical insulation values
  • Flame Rating: UL94 V0 and VW-1
  • Limiting Oxygen index (LOI): greater than 95
  • Gamma, ETO, e-beam and autoclave sterilizable
  • Mil Spec approved (AMS-DTL-23053/11)

Notes on shrinking FEP:

1) As with all fluoropolymers, it is extremely important to make sure that adequate ventilation in the immediate work area is provided PRIOR to beginning the heat shrink process. This cannot be an afterthought, since fumes can cause nausea and dizziness, especially if flames are being used.
2) Only a small degree of recovery is necessary in the shrinking process; however, you may experience a longitudinal (lengthwise) change of up to 10%.
3) As with PTFE, mandrels can act as "heat-sinks", causing the material to rapidly transition back to the crystalline phase before it gets a chance to shrink. We therefore recommend pre-heating larger diameter mandrels.
4) Slow, even heating of the entire tube is highly recommended to insure uniform shrinkage, and the desired results.
5) If the tubing begins to crack, chances are you overheated the material.
6) Also, higher shrink ratios will require higher shrink temperatures.

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