Santoprene® TPV 251-70W232

Santoprene TPV 251-70W232 is a soft, colorable, flame-retardant thermoplastic vulcanizate (TPV) in the thermoplastic elastomer (TPE) family. It offers good fluid resistance and contains non-ether brominated flame retardants. This grade does not contain metal deactivators and is suitable for applications requiring excellent flex fatigue and ozone resistance. Santoprene TPV 251-70W232 is shear-dependent and can be processed on conventional thermoplastics equipment for injection molding, extrusion or blow molding. It is polyolefin based and recyclable within the manufacturing stream.

Key Features:

• UL listed for plastics components (U.S. and Canada)
• UL 94 Vertical Flame rated (V-0 at 1.5 mm; V-2 at 1 mm)
• Excellent flex fatigue resistance
• Excellent ozone resistance
• Good fluid resistance
• Recyclable within the manufacturing stream

Processing Form:

• Injection Molding
• Multi Injection Molding
• Extrusion
• Sheet Extrusion
• Blow Molding
• Injection Blow Molding
• Extrusion Blow Molding

Processing Notes:
Desiccant drying for 3 hours at 80°C (180°F) is recommended. Santoprene TPV has a wide temperature processing window from 175 to 230°C (350 to 450°F) and is incompatible with acetal and PVC.

Santoprene TPV has a relatively high melt viscosity at low shear rates. Viscosity decreases as the shear rate increases. Increasing temperature has little effect on TPV melt viscosity. Smaller gates and higher shear rates keep melt viscosity low and improve melt flow. Please also refer to the injection molding guide.