GEHR Plastics PET Polyethylene Terephthalate

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GEHR Plastics PET Polyethylene Terephthalate
Categories:	Polymer; Thermoplastic; Polyester, TP; Polyethylene Terephthalate (PET)
Material Notes:	Polyethylene terephthalate shows high tensile and mechanical strength, hardness and toughness, low friction and a high dimensional stability. PET may be used at temperatures ranging from -20°C to approximately 115°C. Properties high mechanical resistance and tensile strength high surface strength easy to varnish and polish high dimensional stability high toughness good electrical insulating properties high chemical resistance limited dielectric properties sensitive to hydrolysis Applications include bearings, pumps and parts for housings, frame components, tank lids, cogwheels, insulators for the electrotechnic, deflection rollers for the filament industry, levers, handles, and control disks.
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Physical Properties	Original Value	Comments

Specific Gravity	1.39 g/cc	ISO 1183
Moisture Absorption at Equilibrium	0.25 %	ISO 62
Water Absorption at Saturation	0.50 %	ISO 62

Mechanical Properties	Original Value	Comments
Hardness, Rockwell M	96	ISO 2039
Hardness, Shore D	84	ISO 868
Ball Indentation Hardness	170 MPa	ISO 2039
Tensile Strength, Yield	90.0 MPa	ISO 527
Elongation at Break	15 %	ISO 527
Elongation at Yield	4.0 %	ISO 527
Modulus of Elasticity	3.445 GPa	ISO 527
Charpy Impact Unnotched	50.0 kJ/m²	ISO 179
	57.0 kJ/m²	round rods 220-300mm; ISO 179
	65.0 kJ/m²	round rods 160-200mm; ISO 179
Charpy Impact, Notched	2.00 kJ/m²	ISO 179

Electrical Properties	Original Value	Comments
Volume Resistivity	3.00e+13 ohm-cm	IEC 60093
Surface Resistance	>= 1.00e+13 ohm	IEC 60093
Dielectric Constant	3.2 @Frequency 1e+6 Hz	IEC 60250
Dielectric Strength	22.0 kV/mm	IEC 60243-1
Dielectric Loss Index	0.014 @Frequency 1e+6 Hz	IEC 60250
Comparative Tracking Index	600 V	IEC 60112

Thermal Properties	Original Value	Comments
CTE, linear	80.0 µm/m-°C	ISO 11359
Thermal Conductivity	0.290 W/m-K @Temperature 20.0 °C	ISO 22007-4
Melting Point	245 °C	DIN EN ISO 3146
Maximum Service Temperature, Air	100 °C	UL 746B
Deflection Temperature at 1.8 MPa (264 psi)	80.0 °C	ISO 75
Minimum Service Temperature, Air	-20.0 °C	UL 746B
Glass Transition Temp, Tg	98.0 °C	DIN EN ISO 3146
Flammability, UL94	HB	UL 94
Oxygen Index	25 %	ASTM D2863

Compliance Properties	Original Value	Comments
FDA	Yes	Physiological indifference

Descriptive Properties
Acid Resistance	yes
Aromatic Resistance	yes
Bondability	yes
CKW Resistance	limited
Color	natural
Hydrocarbonate Resistance	yes
Hydroxide Resistance	limited
Physiological indifference	yes, EEC
UV Stabilization	limited / no

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