PEEK — Polyetheretherketone

Polyether ether ketone (PEEK) is a colourless thermoplastic polymer in the polyaryletherketone (PAEK) family. PEEK is a semicrystalline thermoplastic with excellent mechanical and chemical resistance properties that are retained to high temperatures. PEEK has a glass transition temperature of around 143 C and melts around 343 C. It is highly resistant to thermal degradation, as well as to attack by both organic and aqueous environments and shows high resistance to biodegradation.

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Structure

Application

Electronical industry: insulators, connectors and wafer-carrier

Mechanical engineering: gear wheels, sliding elements, compressor- and pump-components, bushings, valves and rollers

Automotive industry: clutch and gearbox components and turbocharger impeller

Conveyor technics: guidances, strokes, rollers, grippers, and valves

Medical industry: parts for surgical instruments and short term implants

Food industry: valves, blenders, strippers, dosing systems and kneaders

Oil- and gas industry: drill heads, sealings and sensors

Selected Grades

Items		Units	Test Methord	Test Condition	770G	550G	330G	550CA30	550GL30
Mechanical Properties	Tensile Strength	-	ISO 527	23℃ Break	-	-	-	250	175
	Tensile Strength	Mpa	ISO 527	23℃ Yield	100	100	100	-	-
	Tensile Elogation	%	ISO 527	23℃ Break	45	40	25	1.6	2.7
	Flexural Strength	-	ISO 178	23℃ Break	-	-	-	370	265
	Flexural Strength	MPa	ISO 178	23℃ Yield	165	170	175	-	-
	Flexural Modulus	GPa	ISO 178	23℃	4.1	4.2	4.3	22	11.3
	Compressive Strength	Mpa	ISO 604	23℃	125	125	130	300	250
	Charpy Impact Strength	kJ m-2	ISO 179/1eA	Notched	7	6	4	7	8
	Charpy Impact Strength	kJ m-2	ISO 179/1U	Unnotched	-	-	-	45	55
	Izod Imact Strength	kJ m-2	ISO 180/A	Notched	7.5	6	5	9	10
	Izod Imact Strength	kJ m-2	ISO 180/U	Unnotched	-	-	-	45	55
	Mould Shrinkage	%	ISO 294-4	Along Flow	1	1	1	0.1	0.3
	Mould Shrinkage	%	ISO 294-4	Across Flow	1.3	1.3	1.3	0.5	0.8
Thermal properties	Melting Point	℃	ISO 11357	-	343	343	343	343	343
	Glass Transition (Tg)	℃	ISO 11357	onset	143	143	143	143	143
	Special Heat Capacity	kJ kg-1 ℃-1	DSC	23℃	2.2	2.2	2.2	1.8	1.7
	Coefficient of thermal expansion	ppm K-1	ISO11359	Below Tg along the flow direction	45	45	50	5	18
	Coefficient of thermal expansion	ppm K-1	ISO11359	Higher Tg along the flow direction	120	120	120	6	18
	Heat Deflection Tempereture	℃	ISO 75A-f	1.8 Mpa	152	152	156	336	328
	Thermal Conductivity	W m-1 K-1	ISO22007-4	23℃	0.29	0.29	0.29	0.95	0.3
Flow	Melting Index	g 10min-1	ISO 1133	380℃,5kg	10	20	80	5	6
Miscellaneous	Density	g cm-3	ISO 1183	Crystalline	1.3	1.3	1.3	1.4	1.51
	Density	g cm-3	ISO 1183	Amorphous	1.26	1.26	1.26	-	-
	Shore D Hardness	-	ISO 868	23℃	85	85	85	88	88
	Water Absorption (3.2mm Thick Tensile Bar)	%	ISO 62-1	24h, 23℃	0.07	0.07	0.07	0.04	0.04
	Water Absorption (3.2mm Thick Tensile Bar)	%	ISO 62-1	23℃ Equilibrium	0.4	0.4	0.4	0.3	0.3
Electrical Data	Dielectric Strength	kV mm-1	IEC 60243-1	2mm	23	23	23	-	25
	Comparative Tracking Index	V	IEC 60112	-	150	150	150	-	150
	Dielectric Constant	-	IEC 60250	23℃, 1kHz	3	3.2	3.2	-	150
	Dielectric Constant	-	IEC 60250	23℃, 50Hz	3	4.5	-	-	-
	Loss Tangent	-	IEC 60250	23℃, 1MHz	0.004	0.003	0.004	-	0.005
	Volume Resistivity	Ω cm	IEC 60093	23℃, 1V	10¹⁶*	10¹⁶*	10¹⁶*	10⁵*	10¹⁶*
	Volume Resistivity	Ω cm	IEC 60093	275℃	10⁹*	10⁹*	10⁹*	-	-