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High Temperature Materials

		10Y	7Y	6Y	5YX	5Y
		PVDF	ETFE	FEP	PFA	PTFE
		Polyvinylidene Fluoride Kynar/Dyflor	Ethylene- Tetrafluorethylene	Fluorine Ethylene Propylene	Perfluoral- Koxypolymeric	Poly- Tetrafluorethylene
Density g/cm³		1.7-1.9	1.6-1.8	2.0-2.3	2.0-2.3	2.0-2.3
Breakdown Voltage KV/mm (20^oC)		25	36	25	25	20
Specific Volume Resistivity Ω cm (20^oC)		10¹⁴	10¹⁶	10¹⁸	10¹⁸	10¹⁸
Dielectric Constant 50 Hz (20^oC)		9-7	2.6	2.1	2.1	2.1
Dielectric Loss Factor (tan δ)		1.4 x 10^-2	8 x 10^-4	3 x 10^-4	3 x 10^-4	3 x 10^-4
Working Temperature	Permanent ^oC	-40 +135	-100 +150	-100 +205	-190 +260	-190 +260
Working Temperature	Short Time ^oC	+160	+180	+230	+280	+300
Melt Temperature +^oC		>170	>265	>225	>290	>325
Flame Resistance		Self Extinguishing	Self Extinguishing	Self Extinguishing	Self Extinguishing	Self Extinguishing
Oxygen Index LOI (% O2)		40-45	30-35	>95	>95	>95
Heating Value H₀ MJ.kg^-1		15	14	5	5	5
Thermal Conductivity W.K^-1.m^-1		0.17	0.24	0.26	0.21	0.26
Corrosive Gases In Case Of Fire		Hydrofluoric	Yes	Yes	Yes	Yes
Radiation Resistance max Mrad		10	10	1	0.1	0.1
Tensile Strength N/mm²		50-80	40-50	15-25	25-30	80
Elongation At Break %		150	150	250	250	50
Shore Hardness		75-80 (D)	70-75 (D)	55-60 (D)	55-60 (D)	55-60 (D)
Abrasion Resistance		Very Good	Very Good	Very Good	Very Good	Very Good
Water Absorption %		0.01	0.02	0.01	0.01	0.01
Halogen Free		No	No	No	No	No
Weather Resistance		Very Good	Very Good	Very Good	Very Good	Very Good
Cold Resistance		Very Good	Very Good	Very Good	Very Good	Very Good