Properties of Wire Insulations

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Material Nom.
Specific
Gravity		 Voltage
Breakdown
(Volts/Mil)		 Abrasion
Resistance		 Nom.
Dielec.
Constant		 Flame
Retardant
Properties		 Flexibility
Polyvinyl Chloride (PVC) 1.37 500 Good 5-8 Excellent Good
Polyethylene - Solid 0.95 600 Good 2.1 Poor Fair
Polyethylene - Foam 0.50 n/a Poor 1.5 Poor Good
Teflon® (FEP) 2.20 600 Excellent 2.1 Excellent Fair
Teflon® (PFA) 2.14 2,000 Excellent 2.0 Excellent Fair
Tefzel™ 1.70 400 Excellent 2.7 Excellent Fair
Nylon 1.07 450 Excellent 4.0 Poor Poor
Polypropylene 0.91 650 Excellent 2.2 Poor Poor
Polyurethane 1.10 500 Excellent 7.0 Poor Excellent
Thermoplastic
Elastomer (TPE)		 1.00 650 Excellent 2.4 Good Good
Hytrel™ 1.20 860 Excellent 6.0 Fair Fair
Silicone 1.32 600 Fair 3.0 Fair Excellent
Fluorosilicone 1.40 350 Excellent 7.0 Excellent Excellent

 

Material Weather-
ability		 Nom. Temp.
Range °C		 Alcoholglycol Gasoline Trichloro-
ethylene
Polyvinyl Chloride (PVC) Excellent -55° - 105° Poor Poor Fair
Polyethylene - Solid Excellent -60° - 80° Good Good Good
Polyethylene - Foam Excellent -60° - 80° Poor Poor Poor
Teflon® (FEP) Excellent -70° - 200° Excellent Excellent Excellent
Teflon® (PFA) Excellent -70° - 260° Excellent Excellent Excellent
Tefzel™ Excellent -70° - 150° Excellent Excellent Excellent
Nylon Excellent -40° - 120° Excellent Good Excellent
Polypropylene Excellent -40° - 105° Good Good Good
Polyurethane Excellent -50° - 80° Good Good Good
Thermoplastic
Elastomer (TPE)		 Excellent -75° - 140° Fair Poor Fair
Hytrel™ Excellent -50° - 105° Good Good Good
Silicone Excellent -65° - 200° Good Good Fair
Fluorosilicone Excellent -60° - 200° Excellent Excellent Excellent
Teflon™, Hytrel™, and Tefzel™ are registered trademarks of DuPont.