GEHR Plastics POM-ESD-FG Polyoxymethylene

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GEHR Plastics POM-ESD-FG Polyoxymethylene
Categories:	Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Copolymer, Unreinforced
Material Notes:	Variant of POM (Copolymer) with an improved electrical conductivity. Surface resistivity =1011 O. Polyoxymethylene can be used in temperatures ranging from -58 °F to +230 °F. The high surface strength is only surpassed by a few materials. POM shows good sliding properties and good resistance to wear because of the high strength and smooth surface. There is a very low risk of stress cracks. Information provided by GEHR Plastics, Inc.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.41 g/cc	1.41 g/cc	ISO 1183
Moisture Absorption at Equilibrium	0.20 %	0.20 %	ISO 62
Water Absorption at Saturation	0.80 %	0.80 %	ISO 62

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	82	82	ISO 868
Tensile Strength at Break	54.0 MPa	7830 psi	ISO 527
Tensile Strength, Yield	>= 56.0 MPa	>= 8120 psi	ISO 527
Elongation at Break	25 %	25 %	ISO 527
Elongation at Yield	20 %	20 %	ISO 527
Modulus of Elasticity	2.67 GPa	387 ksi	ISO 527
Charpy Impact Unnotched	18.0 J/cm²	85.7 ft-lb/in²	ISO 179
Charpy Impact, Notched	0.600 J/cm²	2.86 ft-lb/in²	ISO 179

Electrical Properties	Metric	English	Comments
Volume Resistivity	<= 1.00e+10 ohm-cm	<= 1.00e+10 ohm-cm	IEC 60093
Surface Resistance	<= 1.00e+12 ohm	<= 1.00e+12 ohm	IEC 60093

Thermal Properties	Metric	English	Comments
CTE, linear	120 µm/m-°C	66.7 µin/in-°F	ISO 11359
Melting Point	168 °C	334 °F	ISO 3146
Maximum Service Temperature, Air	100 °C	212 °F	UL 746B
Glass Transition Temp, Tg	-60.0 °C	-76.0 °F	ISO 3146
Flammability, UL94	HB	HB	test results without UL registration; UL 94

Compliance Properties	Metric	English	Comments
FDA	Yes	Yes	Physiological indifference

Descriptive Properties
Acid Resistance	Yes
Aromatic Resistance	Yes
CKW Resistance	Limited
Hydrocarbonate Resistance	Yes
Hydroxide Resistance	Yes
Ketone Resistance	Yes
Physiological indifference	yes, EEC
Resistance to Hot Water	Yes

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PGEHR027c / 122035

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