Celanese Hytrel® 7246 TPC-ET

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Celanese Hytrel® 7246 TPC-ET
Categories:	Polymer; Thermoplastic; Elastomer, TPE; Polyester TPE
Material Notes:	72 Shore D High Performance Polyester Elastomer Former DuPont product acquired by Celanese in 2022.
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Physical Properties	Original Value	Comments

Density	1.26 g/cc	ISO 1183
Melt Density	1.11 g/cc @Temperature 245 °C
Water Absorption	0.30 % @Time 86400 sec	Immersion; Sim. to ISO 62
	0.60 % @Thickness 2.00 mm	Sim. to ISO 62
Moisture Absorption	0.200 % @Thickness 2.00 mm	Sim. to ISO 62
Linear Mold Shrinkage, Flow	0.016 cm/cm	ISO 294-4, 2577
Linear Mold Shrinkage, Transverse	0.016 cm/cm	ISO 294-4, 2577
Melt Flow	12 g/10 min @Load 2.16 kg, Temperature 240 °C	cm³/10min Volumetric; ISO 1133
	13 g/10 min @Load 2.16 kg, Temperature 240 °C	ISO 1133

Mechanical Properties	Original Value	Comments
Hardness, Shore D	64	15s; ISO 48-4
	<= 68	ISO 48-4
Tensile Stress at Strain	14.0 MPa @Strain 5.0 %	1BA specimen at 50mm/min; ISO 527-1/-2
	23.0 MPa @Strain 10 %	ISO 527-1/-2
	24.0 MPa @Strain 50 %	ISO 527-1/-2
Tensile Modulus	550 MPa	ISO 527-1/-2
Flexural Modulus	550 MPa	ISO 178
Poissons Ratio	0.47
Izod Impact, Notched (ISO)	7.00 kJ/m² @Temperature -40.0 °C	ISO 180/1A
	38.0 kJ/m² @Temperature 23.0 °C	ISO 180/1A
Charpy Impact, Notched	7.00 kJ/m² @Temperature -40.0 °C	ISO 179/1eA
	8.00 kJ/m² @Temperature -30.0 °C	ISO 179/1eA
	36.0 kJ/m² @Temperature 23.0 °C	ISO 179/1eA
Tensile Impact Strength	300 kJ/m² @Temperature 23.0 °C	Notched; ISO 8256/1
Tensile Creep Modulus, 1 hour	360 MPa	1h; ISO 899-1
Tensile Creep Modulus, 1000 hours	310 MPa	1000h; ISO 899-1
Tear Strength	172 kN/m	normal; ISO 34-1
	182 kN/m	parallel; ISO 34-1
Abrasion	100	mm³; ISO 4649

Electrical Properties	Original Value	Comments
Volume Resistivity	2.00e+12 ohm-cm	IEC 62631-3-1
Surface Resistance	>= 1.00e+15 ohm	IEC 62631-3-2
Dielectric Constant	3.5 @Frequency 1e+6 Hz	IEC 62631-2-1
	4.0 @Frequency 100 Hz	IEC 62631-2-1
Dielectric Strength	20.0 kV/mm	IEC 60243-1
Dissipation Factor	0.016 @Frequency 100 Hz	IEC 62631-2-1
	0.030 @Frequency 1e+6 Hz	IEC 62631-2-1
Comparative Tracking Index	600 V	IEC 60112

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	180 µm/m-°C	ISO 11359-1/-2
	120 µm/m-°C @Temperature -40.0 - 23.0 °C	ISO 11359-1/-2
CTE, linear, Transverse to Flow	170 µm/m-°C	ISO 11359-1/-2
	130 µm/m-°C @Temperature -40.0 - 23.0 °C	ISO 11359-1/-2
Specific Heat Capacity	2.15 J/g-°C @Temperature 245 °C	Melt
Thermal Conductivity	0.150 W/m-K @Temperature 245 °C	Melt
Melting Point	218 °C	10°C/min; ISO 11357-1/-3
Deflection Temperature at 0.46 MPa (66 psi)	100 °C	ISO 75-1/-2
Deflection Temperature at 1.8 MPa (264 psi)	50.0 °C	ISO 75-1/-2
Vicat Softening Point	140 °C	50°C/h, 50N; ISO 306
	205 °C	50°C/h 10N; ISO 306
Brittleness Temperature	-97.0 °C	ISO 974
Glass Transition Temp, Tg	25.0 °C	10°C/min; ISO 11357-1/-2
Flammability, UL94	HB @Thickness 1.50 mm	IEC 60695-11-10
Oxygen Index	23 %	ISO 4589-1/-2

Processing Properties	Original Value	Comments
Melt Temperature	235 °C	Optimum, Extrusion
	225 - 245 °C	Range, Extrusion
	245 °C	Optimum, Injection
	240 - 260 °C	Range, Injection
Mold Temperature	45.0 °C	Optimum, Injection
	45.0 - 55.0 °C	Injection
Drying Temperature	110 °C	Injection
	100 - 120 °C	Extrusion
Dry Time	2.00 - 3.00 hour	Extrusion, Dehumidified Dryer
	2.00 - 3.00 hour	Injection, Dehumidified Dryer
Moisture Content	<= 0.060 %	Extrusion
	<= 0.080 %	Injection
Hold Pressure	<= 70.0 MPa	Injection

Descriptive Properties
Drying Recommended	yes	Injection
Eff. thermal diffusivity (m²/s)	8E-08
Emission of organic compounds (µgC/g)	300	VDA 277
FMVSS Class	SE/B	ISO 3795 (FMVSS 302)
ISO designation	ISO 20029-TPC-ET,,GLN,70-22-075
Light stability delta a	-0.1	DIN 53236
Light stability delta b	15	DIN 53236
Light stability delta E	16	DIN 53236
Light stability delta l	-3	DIN 53236
Part Marking Code	>TPC-ET<	ISO 11469
Polymer	TPC
Resin Identification	TPC-ET	ISO 1043

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