Properties of Fluoroplastics

Physical Properties of PTFE Compared to FLuorothermoplastics

Properties	Test method	Unit	PTFE	PTFE mod.	FEP	PFA Compounds	PCTFE	PVDF
Density	ISO 12086	g/cm3	2.15 – 2.19	2.15 – 2.19	2.12 – 2.17	2.12 – 2.17	2.10 – 2.20	1.76 – 1.78
Tensile strength 23°C	ISO 12086	N/mm2	22 – 40	22 – 40	18 – 25	27 – 29	30 – 38	38 – 50
Ultimate elongation 23°C	ISO 12086	%	250 – 500	400 – 700	250 – 350	300	80 – 200	30 – 40
Ball indentation hardness 23°C	ISO 12086	N/mm2	23 – 32	23 – 32	23 – 28	25 – 30	30	65
Yield strength 23°C	ISO 12086	N/mm2	10	11	12	14	40	46
Tensile Emodulus 23°C	ISO 12086	N/mm2	400 – 800	440 – 880	350 – 700	650	1000 – 2000	800 – 1800
Bending Emodulus 23°C	ISO 12086	N/mm2	600 – 800	660 – 880	660 – 680	650 – 700	1200 – 1500	1200 – 1400
Bending stress limit 23°C	ISO 12086	N/mm2	18 – 20	18 – 20		15	52 – 63	55
Shore hardness D 23°C	ISO 12086		55 – 72	55 – 72	55 – 60	60 – 65	70 – 80	73 – 85
Melting temperature	ASTM 2116	°C	327	327	253 – 282	280 – 310	185 – 210	165 – 178
Permanent service temperature, unloaded		°C	260	260	205	260	150	150
Thermal expansion coefficient 10–5	DIN 53752	K–1	10 – 16	10 – 16	8 – 14	10 – 16	4 – 8	8 – 12
Thermal conductivity 23°C	DIN 52612	W/K · m	0.25	0.25	0.2	0.22	0.19	0.17
Specific heat 23°C		KJ/kg · K	1.01	1.01	1.17	1.09	0.92	1.38
Oxygen index		%	>95	>95	>95	>95	>95	>43
Water absorption	DIN 53495	%	<0.01	<0.01	<0.01	<0.03	<0.01	<0.03

Physical Properties of PTFE Compared to FLuorothermoplastics(1) Physical Properties of Unfilled PTFE Compared to Various PTFE Compounds

Properties	Properties	Unit	PTFE unfilled	PTFE +60% bronze	PTFE + 10% AP* + 1% carbon black	PTFE + 25% glass fiber	PTFE + 15% graphite	PTFE + 10% glass fiber + 10% graphite	PTFE + 25% carbon	PTFE + 30% carbon + 3% graphite
Density	ISO 12086	g/cm3	2.15	3.85 ±5%	2.04 ±3%	2.23 ±3%	2.16 ±3%	2.17 ±3%	2.09 ±3%	2.0 ±4%
Tensile strength 23°C	ISO 12086	N/mm2	≥ 25	≥ 12	≥ 14	≥ 14	≥ 12	≥ 14	≥ 13	≥ 10
Ultimate elongation 23°C	ISO 12086	%	≥ 280	≥ 120	≥ 160	≥ 160	≥ 120	≥ 200	≥ 100	≥ 60
Ball indentation hardness 135/60 23°C	ISO 12086	N/mm2	≥ 22.6	≥ 33	≥ 32	≥ 27	≥ 28	≥ 30	≥ 34	≥ 40
Specific resistivity	DIN VDE 0303 Teil 30 IEC 93	Ω · cm	>10¹⁸			>10¹⁵	>10¹⁰	>10¹²	>10²
Surface resistivity	DIN VDE 0303 Teil 30 IEC 93	Ω	>10¹⁷			>10¹⁵	>10¹¹	>10¹²	>10²
Thermal conductivity	DIN 52612	W/m · K	0.25	0.6 - 0.8	-	0.4 – 0.5	0.7 – 0.9	0.4 – 0.6	0.5 – 0.7	0.6 – 0.8
Thermal expansion	see Thermal expansion curves page 11 to 13
Use in gaseous oxygen			BAM- approval				BAM- approval	BAM- approval	BAM- approval	BAM- approval