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Teknor Apex Medalist® MD-8431 Thermoplastic Elastomer
Categories: Polymer; Thermoplastic; Elastomer, TPE

Material Notes: Notes: Medalist MD-8431 is a high performance thermoplastic elastomer designed specifically for extrusion and injection molded electrical applications in the medical and healthcare industry. Medalist MD-8431 is a low hardness, low density grade exhibiting good flexibility over a wide temperature range and is suitable for insulation and jacketing.

Availability: Africa & Middle East; Europe; Asia Pacific; Latin America; North America

Features: Autoclave Sterilizable; Electrically Insulation; Ethylene Oxide Sterilizable; Good Color Stability; Good Colorability; Good Sterilizability; Halogen Free; High Tensile Strength; Low Density; Low Flow; Low Specific Gravity; Medium Hardness; Radiation Sterilizable; Slip

Uses: Dental Applications; Flexible Jacketing; Hospital Goods; Medical Devices; Medical/Healthcare Applications; Pharmaceuticals; Rubber Replacement; Wire & Cable Applications

Agency Ratings: ISO 13485

RoHS Compliance: RoHS Compliant

Form: Pellets

Processing Method: Extrusion; Injection Molding

Preliminary data.

Information provided by Teknor Apex

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Physical PropertiesOriginal ValueComments
Density 0.920 g/ccASTM D792
Melt Flow 5.0 g/10 min
@Load 5.00 kg,
Temperature 200 °C
ASTM D1238
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 68
@Time 5.00 sec
ASTM D2240
 70
@Time 1.00 sec
ASTM D2240
Tensile Strength at Break 2650 psiASTM D412
 1830 psi
@Treatment Temp. 60.0 °C,
Time 605000 sec
in IRM 902 Oil; ASTM D573
 3340 psi
@Treatment Temp. 108 °C,
Time 605000 sec
In Air; ASTM D573
Tensile Stress at Strain 380 psi
@Strain 100 %
ASTM D412
 660 psi
@Strain 300 %
ASTM D412
Elongation at Break 700 %ASTM D412
 651 %
@Treatment Temp. 60.0 °C,
Time 605000 sec
in IRM 902 Oil; ASTM D471
 693 %
@Treatment Temp. 108 °C,
Time 605000 sec
In Air; ASTM D471
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 3.90e+15 ohm-cm
@Temperature 50.0 °C
ASTM D257
 4.30e+16 ohm-cm
@Temperature 22.8 °C
ASTM D257
Dielectric Constant 2.29
@Frequency 1000 Hz
ASTM D150
Dielectric Strength 1200 V/milASTM D149
Dissipation Factor 0.00086
@Frequency 1000 Hz
ASTM D150
 
Thermal PropertiesOriginal ValueComments
Brittleness Temperature <= -76.0 °FASTM D746
Flammability, UL94 HB
@Thickness 1.52 mm
NT
Oxygen Index 19 %ASTM D2863
 
Processing PropertiesOriginal ValueComments
Processing Temperature 430 - 445 °FMelt, Injection
Rear Barrel Temperature 390 - 420 °FInjection
Middle Barrel Temperature 415 - 430 °FInjection
Front Barrel Temperature 430 - 440 °FInjection
Zone 1 380 - 410 °FExtrusion
Zone 2 390 - 420 °FExtrusion
Zone 3 415 - 430 °FExtrusion
Zone 4 415 - 430 °FExtrusion
Zone 5 430 - 445 °FExtrusion
Die Temperature 430 - 445 °FExtrusion
Mold Temperature 77.0 - 150 °FInjection
Back Pressure 25.0 - 50.0 psiInjection
Cushion 0.150 - 1.00 inInjection
Screw Speed 30 - 100 rpmExtrusion
 50 - 100 rpmInjection
 
Descriptive Properties
AppearanceColors Available
 Natural Color
 Opaque

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