Lubrizol Estane® S398A Thermoplastic Polyurethane

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Lubrizol Estane® S398A Thermoplastic Polyurethane (discontinued **)
Categories:	Polymer; Thermoplastic; Polyurethane, TP; Thermoplastic Polyurethane (TPUR), Polyester Grade
Material Notes:	Type: Estane® S398A is a Shore 98A, polyester based thermoplastic polyurethane (TPU) with excellent transparency. FDA approved (21 CFR 177.2600, 177.1680). Uses: Injection Molding. Information Provided by The Lubrizol Corporation
Key Words:	TPU
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Physical Properties	Original Value	Comments

Specific Gravity	1.22 g/cc	ASTM D792
Linear Mold Shrinkage	0.0070 cm/cm	ASTM D955

Mechanical Properties	Original Value	Comments
Hardness, Shore A	98	ASTM D2240
Hardness, Shore D	55	ASTM D2240
Tensile Strength, Ultimate	430 kg(f)/cm²	ASTM D412
Tensile Strength, Yield	200 kg(f)/cm²	at 100% elongation; ASTM D412
	320 kg(f)/cm²	at 300% elongation; ASTM D412
Elongation at Break	420 %	ASTM D412
Tear Strength	170 kg(f)/cm	Die C; ASTM D624
Abrasion	30	mm³ loss; ISO 4649
Compression Set	20 % @Temperature 23.0 °C, Time 79200 sec	ASTM D395
	45 % @Temperature 70.0 °C, Time 79200 sec	ASTM D395

Thermal Properties	Original Value	Comments
Vicat Softening Point	116 °C	ASTM D1525

Processing Properties	Original Value	Comments
Feed Temperature	180 - 195 °C
Nozzle Temperature	190 - 205 °C
Mold Temperature	10.0 - 40.0 °C
Injection Pressure	1200 - 2000 psi
Hold Pressure	800 - 1400 psi
Back Pressure	30.0 - 80.0 psi
Cycle Time - Injection	20 - 30 sec
Screw Speed	160 - 200 rpm

Compliance Properties	Original Value	Comments
FDA	Yes

Descriptive Properties
Injection Time (s)	10-15

**
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