ExxonMobil Santoprene® 273-50 Thermoplastic Elastomer

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ExxonMobil Santoprene® 273-50 Thermoplastic Elastomer (discontinued **)
Categories:	Polymer; Thermoplastic; Elastomer, TPE; Thermoplastic Vulcanizate Elastomer (TPV)
Material Notes:	A hard, colorable, specialty thermoplastic vulcanizate (TPV) in the thermoplastic elastomer (TPE) family. It complies with FDA regulations for rubber articles intended for repeated use, as well as those in contact with non-fatty, non-oily foods as closures and sealing gaskets. This grade of Santoprene TPV is shear-dependent and can be processed on conventional thermoplastics equipment for injection molding, extrusion or blow molding. It is polyolefin based and completely recyclable. Recommended for applications requiring excellent flex fatigue resistance. Recommended for applications requiring excellent ozone resistance. Information provided by Advanced Elastomer Systems
Key Words:	EU 2003/11/EC; FDA 21 CFR 177.1210; FDA 21 CFR 177.2600; NSF 51; RoHS Compliant; UL QMFZ2; UL QMFZ8
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Physical Properties	Original Value	Comments

Specific Gravity	0.940 g/cc	ASTM D792

Mechanical Properties	Original Value	Comments
Hardness, Shore D	50	.12 in; ASTM D2240
Tensile Strength, Yield	1183.2 psi	Air at 302°F, 168 hr; ASTM D573
	1339.8 psi	257°F, 70 hr, in IRM 903 Oil; ASTM D471
	1740 psi	ASTM D638
Elongation at Yield	21.9 %	257°F, 70 hr, in IRM 903 Oil; ASTM D471
	21.9 %	Air at 302°F, 168 hr; ASTM D573
	30 %	ASTM D638
Tear Strength	497 pli	73°F, Die C; ASTM D624
Compression Set	59 % @Temperature 70.0 °C, Time 79200 sec	ASTM D395
	74 % @Temperature 125 °C, Time 252000 sec	ASTM D395

Thermal Properties	Original Value	Comments
Brittleness Temperature	-18.0 °F	ASTM D746

Processing Properties	Original Value	Comments
Processing Temperature	175 - 230 °C
Rear Barrel Temperature	380 °F
Middle Barrel Temperature	390 °F
Front Barrel Temperature	400 °F
Nozzle Temperature	410 - 465 °F
Die Temperature	420 °F	Extrusion
Melt Temperature	410 °F	Extrusion
	420 - 450 °F
Mold Temperature	50.0 - 125 °F	Processing
Drying Temperature	180 °F
Dry Time	3 hour
Moisture Content	0.080 %
Back Pressure	50.0 - 100 psi	Processing
	725 - 2900 psi	Extrusion
Clamp Pressure	6000 - 10000 psi
Vent Depth	0.00100 in
Cushion	0.125 - 0.250 in
Screw Speed	100 - 200 rpm

Compliance Properties	Original Value	Comments
FDA	Yes

Descriptive Properties
Color	Natural Color
Form	Pellets
Injection Rate	Fast
Maximum Regrind %	20
Screw Compression Ratio	2:1 - 2.5:1
Screw L/D Ratio	16:1 - 20:1

**
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