Insulation Type: XL-PVDF
Trade Names(the following are common tradenames used for XL-PVDF insulation)
 |
| MIL-W-81044/12 |
 |
| As shown in structure I, the cross-linking is via a former carbon boned to hydrogen. It is possible that the cross-linking is through a former carbon-fluorine bond (structure II), but the bond strength of a carbon-fluorine is greater than that of a carbon-carbon bond. |
Aircraft on which XL-PVDF has been used/found- A-10 (No dates available)
- Boeing 747 (No dates available)
- Cessna 400 Series (No dates available)
- Cessna 500 Series (No dates available)
- DC-9 (1968 - 1977)
*Note: Some of the older aircraft types of insulation may have replaced by the original wire. The listings of aircraft are not complete, especially with those special uses, e.g., engine areas, electronic boxes, etc.
Mil Specs and other Standards using XL-PVDF- BMS13-38 (Boeing)
- DSP-26
- MIL-W-81044/1
- MIL-W-81044/2
- MIL-W-81044/3
- MIL-W-81044/4
- MIL-W-81044/5
- MIL-W-81044/6
- MIL-W-81044/7
- MIL-W-81044/8
- MIL-W-81044/9
- MIL-W-81044/10
- MIL-W-81044/11
- MIL-W-81044/12
- MIL-W-81044/13
- MIL-W-81044/14
- MIL-W-81044/15
Advantages: Because dual extrusion which is fused by sintering, it combines excellent abrasion and cut-through resistance of PVDF with poly-alkene for greater flexibility and improved heat resistance
Cross-linked PVDF reduces possible decomposition with the loss of HF – expected to be a small effect
Not affected with exposure to normally expected fluids
Radiation damage starts at ~ 10^7 Rd
Disadvantages: PVDF by itself is stiff
Heavy - 5.5 pounds per 1000 feet (8.1 kg/km) for AWG 20
Somewhat lower temperature ratings, e.g., 150 C maximum
Relative thicker than some other wire types -70 mils (1.78 mm) for AWG 20
Small weight loss over time from decomposition (loss of HF) - 1 % in 15 yr (estimated)
Other Information: When employed in aircraft wiring, it appears that XL PVDF is used with an inner layer of XL-Poly alkene
Cross linking by high energy electrons