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Elmet Technologies

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
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 1.41 g/cc0.0509 lb/in³ISO 1183-1
Moisture Absorption at Equilibrium 0.20 %
@Temperature 23.0 °C
0.20 %
@Temperature 73.4 °F
50% RH
Water Absorption at Saturation 0.80 %
@Temperature 23.0 °C
0.80 %
@Temperature 73.4 °F
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell M 8484dry; ISO 2039-2
Hardness, Shore D 8181DIN 53505
Ball Indentation Hardness 140 MPa20300 psidry; ISO 2039-1
Tensile Strength, Yield 66.0 MPa9570 psidry; ISO 527-1
 66.0 MPa9570 psi50% RH; ISO 527-1
Elongation at Break 50 %50 %dry; ISO 527-1
 50 %50 %50% RH; ISO 527-1
Creep Strength  13.0 MPa
@Time 3.60e+6 sec
1890 psi
@Time 1000 hour
stress leading to 1% elongation; dry; ISO 899-1
 13.0 MPa
@Time 3.60e+6 sec
1890 psi
@Time 1000 hour
stress leading to 1% elongation; 50% RH; ISO 899-1
Modulus of Elasticity 2.80 GPa406 ksidry
 2.80 GPa406 ksi50% RH
Compressive Yield Strength  19.0 MPa
@Strain 1 %
2760 psi
@Strain 1 %
dry; ISO 604
 35.0 MPa
@Strain 2 %
5080 psi
@Strain 2 %
dry; ISO 604
 67.0 MPa
@Strain 5.0 %
9720 psi
@Strain 5.0 %
dry; ISO 604
Charpy Impact Unnotched 15.0 J/cm²71.4 ft-lb/in²dry; ISO 179-1/1eU
 >= 15.0 J/cm²>= 71.4 ft-lb/in²ISO 179
Charpy Impact, Notched 0.700 J/cm²3.33 ft-lb/in²dry; ISO 179-1/1eA
Coefficient of Friction, Dynamic 0.300.30
Sand Slurry 8.98.9µm/km
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity >= 1.00e+14 ohm-cm>= 1.00e+14 ohm-cmdry; IEC 60093
 >= 1.00e+14 ohm-cm>= 1.00e+14 ohm-cm50% RH; IEC 60093
Surface Resistance >= 1.00e+13 ohm>= 1.00e+13 ohmdry; IEC 60093
 >= 1.00e+13 ohm>= 1.00e+13 ohm50% RH; IEC 60093
Dielectric Constant  3.8
@Frequency 100 Hz
3.8
@Frequency 100 Hz
dry; IEC 60250
 3.8
@Frequency 100 Hz
3.8
@Frequency 100 Hz
50% RH; IEC 60250
 3.8
@Frequency 1e+6 Hz
3.8
@Frequency 1e+6 Hz
dry; IEC 60250
 3.8
@Frequency 1e+6 Hz
3.8
@Frequency 1e+6 Hz
50% RH; IEC 60250
Dielectric Strength 20.0 kV/mm508 kV/indry; IEC 60243-1
 20.0 kV/mm508 kV/in50% RH; IEC 60243-1
Dielectric Loss Index  0.0030
@Frequency 100 Hz
0.0030
@Frequency 100 Hz
dry; IEC 60250
 0.0030
@Frequency 100 Hz
0.0030
@Frequency 100 Hz
50% RH; IEC 60250
 0.0080
@Frequency 1e+6 Hz
0.0080
@Frequency 1e+6 Hz
dry; IEC 60250
 0.0080
@Frequency 1e+6 Hz
0.0080
@Frequency 1e+6 Hz
50% RH; IEC 60250
 
Thermal PropertiesMetricEnglishComments
CTE, linear  110 µm/m-°C
@Temperature 23.0 - 60.0 °C
61.1 µin/in-°F
@Temperature 73.4 - 140 °F
 125 µm/m-°C
@Temperature 23.0 - 100 °C
69.4 µin/in-°F
@Temperature 73.4 - 212 °F
Thermal Conductivity 0.310 W/m-K2.15 BTU-in/hr-ft²-°F
Melting Point 165 °C329 °FISO 11357-1
Maximum Service Temperature, Air  100 °C
@Time 7.20e+7 sec
212 °F
@Time 20000 hour
 115 °C
@Time 1.80e+7 sec
239 °F
@Time 5000 hour
 140 °C
@Time <=86400 sec
284 °F
@Time <=24.0 hour
Minimum Service Temperature, Air -50.0 °C-58.0 °F
Glass Transition Temp, Tg -50.0 °C-58.0 °FISO 11357-1
Flammability, UL94 HBHB
 
Compliance PropertiesMetricEnglishComments
European Food 1935/2004 YesYes
FDA YesYes
 
Descriptive Properties
ColorNatural/Black

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