STAR Thermoplastic Alloys & Rubbers Starflex® P 7391 Elastomer

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STAR Thermoplastic Alloys & Rubbers Starflex® P 7391 Elastomer (discontinued **)
Categories:	Polymer; Thermoplastic; Elastomer, TPE; Thermoplastic Elastomer, Melt-Processible Rubber
Material Notes:	Description: Starflex® P 7391 Elastomer is an easy processing 91 Shore A hardness material designed for a wide variety of applications. It is supplied in pelletized form ready for thermoplastic processing. Starflex® P 7391 is a versatile product for use in injection molding, extrusion blow molding and other thermoplastic fabricating techniques. Applications: Mud flaps, knobs, pads Information provided by STAR Thermoplastic Alloys & Rubbers.
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Physical Properties	Original Value	Comments

Specific Gravity	1.15 g/cc
Linear Mold Shrinkage	0.010 - 0.015 cm/cm

Mechanical Properties	Original Value	Comments
Hardness, Shore A	91	Injection molded; ASTM D2240
Tensile Strength at Break	1730 psi	ASTM D412
Elongation at Break	640 %	ASTM D412
300% Modulus	0.900 ksi @Strain 300 %	ASTM D412

Processing Properties	Original Value	Comments
Rear Barrel Temperature	380 - 400 °F
Front Barrel Temperature	400 - 420 °F
Nozzle Temperature	420 - 450 °F
Mold Temperature	80.0 - 150 °F
Injection Pressure	500 - 700 psi
Back Pressure	100 - 200 psi

Descriptive Properties
Color	Natural/Black
Injection Rate	Medium-Fast

**
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PSTAR19 / 68552

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