Murtfeldt Murytal® C Acetal Copolymer

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Murtfeldt Murytal® C Acetal Copolymer
Categories:	Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Copolymer, Unreinforced
Material Notes:	Thanks to their extremely low absorption of moisture, Murytal® materials are ideally suited for use as electronic isolation components. A fine crystalline structure and high yield strength mean that Murytal® C has a high ability to regain its original form. Special Properties: • High rigidity • Excellent ability to regain its form • Extremely good electric isolation properties • Practically no moisture absorption • Good resistance to chemicals (pH 4 – 13) • Approved for use in the food industry (EU and FDA) • Extremely good machinability • Hydrolysis resistant to 80°C Information provided by Murtfeldt Kunststoffe GmbH & Co. KG.
Key Words:	POM-C
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Physical Properties	Original Value	Comments

Density	1.41 g/cc	ISO 1183-1
Moisture Absorption at Equilibrium	0.20 % @Temperature 23.0 °C	50% RH
Water Absorption at Saturation	0.80 % @Temperature 23.0 °C

Mechanical Properties	Original Value	Comments
Hardness, Rockwell M	84	dry; ISO 2039-2
Hardness, Shore D	81	DIN 53505
Ball Indentation Hardness	140 MPa	dry; ISO 2039-1
Tensile Strength, Yield	66.0 MPa	dry; ISO 527-1
	66.0 MPa	50% RH; ISO 527-1
Elongation at Break	50 %	dry; ISO 527-1
	50 %	50% RH; ISO 527-1
Creep Strength	13.0 MPa @Time 3.60e+6 sec	stress leading to 1% elongation; dry; ISO 899-1
	13.0 MPa @Time 3.60e+6 sec	stress leading to 1% elongation; 50% RH; ISO 899-1
Modulus of Elasticity	2.80 GPa	dry
	2.80 GPa	50% RH
Compressive Yield Strength	19.0 MPa @Strain 1 %	dry; ISO 604
	35.0 MPa @Strain 2 %	dry; ISO 604
	67.0 MPa @Strain 5.0 %	dry; ISO 604
Charpy Impact Unnotched	150 kJ/m²	dry; ISO 179-1/1eU
	>= 150 kJ/m²	ISO 179
Charpy Impact, Notched	7.00 kJ/m²	dry; ISO 179-1/1eA
Coefficient of Friction, Dynamic	0.30
Sand Slurry	8.9	µm/km

Electrical Properties	Original Value	Comments
Electrical Resistivity	>= 1.00e+14 ohm-cm	dry; IEC 60093
	>= 1.00e+14 ohm-cm	50% RH; IEC 60093
Surface Resistance	>= 1.00e+13 ohm	dry; IEC 60093
	>= 1.00e+13 ohm	50% RH; IEC 60093
Dielectric Constant	3.8 @Frequency 100 Hz	dry; IEC 60250
	3.8 @Frequency 100 Hz	50% RH; IEC 60250
	3.8 @Frequency 1e+6 Hz	dry; IEC 60250
	3.8 @Frequency 1e+6 Hz	50% RH; IEC 60250
Dielectric Strength	20.0 kV/mm	dry; IEC 60243-1
	20.0 kV/mm	50% RH; IEC 60243-1
Dielectric Loss Index	0.0030 @Frequency 100 Hz	dry; IEC 60250
	0.0030 @Frequency 100 Hz	50% RH; IEC 60250
	0.0080 @Frequency 1e+6 Hz	dry; IEC 60250
	0.0080 @Frequency 1e+6 Hz	50% RH; IEC 60250

Thermal Properties	Original Value	Comments
CTE, linear	110 µm/m-°C @Temperature 23.0 - 60.0 °C
	125 µm/m-°C @Temperature 23.0 - 100 °C
Thermal Conductivity	0.310 W/m-K
Melting Point	165 °C	ISO 11357-1
Maximum Service Temperature, Air	100 °C @Time 7.20e+7 sec
	115 °C @Time 1.80e+7 sec
	140 °C @Time <=86400 sec
Minimum Service Temperature, Air	-50.0 °C
Glass Transition Temp, Tg	-50.0 °C	ISO 11357-1
Flammability, UL94	HB

Compliance Properties	Original Value	Comments
European Food 1935/2004	Yes
FDA	Yes

Descriptive Properties
Color	Natural/Black

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PMURT926 / 156573

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