Teknor Apex ELEXAR® EL 8421 Thermoplastic Elastomer

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Teknor Apex ELEXAR® EL 8421 Thermoplastic Elastomer
Categories:	Polymer; Thermoplastic; Elastomer, TPE; Thermoplastic Elastomer, Melt-Processible Rubber
Material Notes:	Notes: Elexar® EL-8421 is a high performance thermoplastic elastomer designed for the electrical applications requiring flexibility over a wide temperature range. Elexar® EL-8421 is a high durometer that is RoHS and REACH SVHC compliant. This grade is UL listed and is suitable for both injection molding and extrusion. Features: Good Colorability; Halogen Free; Heat Aging Resistant; High Hardness; High Tensile Strength; Medium Density; Medium Flow Uses: Appliance Wire Insulation; Appliance Wire Jacketing; Cable Jacketing; Connectors; Flexible Cord Jacketing; Industrial Cable Insulation; Terminal Cable Jacketing; Underground Power Cable; Wire & Cable Applications; Wire Jacketing Form: Pellets Processing Method: Extrusion; Injection Molding Information provided by Teknor Apex Company
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Physical Properties	Original Value	Comments

Specific Gravity	0.980 g/cc	ASTM D792
Melt Flow	16 g/10 min @Load 5.00 kg, Temperature 200 °C	ASTM D1238

Mechanical Properties	Original Value	Comments
Hardness, Shore A	91	ASTM D2240
Tensile Strength, Yield	2900 psi	0.02 in, Die C, 20 in/min, die cut from extruded tapes; ASTM D412
	1160 psi @Treatment Temp. 121 °C, Time 64800 sec	in Vegetable Oil; ASTM D471
	2030 psi @Treatment Temp. 121 °C, Time 64800 sec	in Animal Fat; ASTM D471
	2900 psi @Treatment Temp. 136 °C, Time 605000 sec	in Air; ASTM D573
	3103 psi @Treatment Temp. 60.0 °C, Time 605000 sec	in IRM 902 Oil; ASTM D471
Tensile Stress at Strain	955 psi @Strain 100 %, Thickness 0.508 mm	Die C, 20 in/min, die cut from extruded tapes; ASTM D412
	1250 psi @Strain 300 %, Thickness 0.508 mm	Die C, 20 in/min, die cut from extruded tapes; ASTM D412
Elongation at Break	630 %	0.02 in, Die C, 20 in/min, die cut from extruded tapes; ASTM D412
	441 % @Treatment Temp. 121 °C, Time 64800 sec	in Vegetable Oil; ASTM D471
	472.5 % @Treatment Temp. 121 °C, Time 64800 sec	in Animal Fat; ASTM D471
	573.3 % @Treatment Temp. 136 °C, Time 605000 sec	in Air; ASTM D573
	655.2 % @Treatment Temp. 60.0 °C, Time 605000 sec	in IRM 902 Oil; ASTM D471

Electrical Properties	Original Value	Comments
Volume Resistivity	3.50e+16 ohm-cm @Temperature 50.0 °C	ASTM D257
Insulation Resistance	9.00e+10 ohm	IEC 60167
Dielectric Constant	2.4 @Frequency 1000 Hz	ASTM D150
Dielectric Strength	970 V/mil	ASTM D149

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	105 °C	Continuous; UL-1581
Brittleness Temperature	-65.6 °C	ASTM D746
UL RTI, Electrical	50.0 °C	UL746
UL RTI, Mechanical with Impact	50.0 °C	UL746
Flammability, UL94	HB @Thickness 0.762 mm	All Colors
Oxygen Index	18 %	ASTM D2863

Processing Properties	Original Value	Comments
Rear Barrel Temperature	390 - 420 °F
Middle Barrel Temperature	415 - 430 °F
Front Barrel Temperature	430 - 440 °F
Nozzle Temperature	430 - 445 °F
Zone 1	380 - 410 °F
Zone 2	390 - 420 °F
Zone 3	415 - 430 °F
Zone 4	430 - 440 °F
Zone 5	430 - 440 °F
Die Temperature	430 - 445 °F
Melt Temperature	430 - 445 °F	Processing Temp
Mold Temperature	77.0 - 150 °F
Injection Pressure	200 - 1000 psi
Back Pressure	25.0 - 50.0 psi
Cushion	0.150 - 1.00 in
Screw Speed	50 - 100 rpm

Descriptive Properties
Swell	1%;Aged 18 hrs at 121°C in Animal Fat. (ASTM D471)
	1%;Aged 18 hrs at 121°C in Vegetable oil. (ASTM D471)

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