Santoprene® TPV 151-70W256

Santoprene TPV 151-70W256 is a black, flame-retardant thermoplastic vulcanizate (TPV) in the thermoplastic elastomer (TPE) family. This material is designed to meet UL requirements for junction boxes and connectors used in photovoltaic systems, including UL 6703, 6703A, 3730 and 1703. It provides UL 94 V-1 flammability performance down to 1.5 mm and UL 94 5VA performance down to 1.8 mm. The material has an elevated Relative Thermal Index (RTI) of 95°C and is rated for outdoor suitability with an f1 classification. This grade of Santoprene TPV is shear-dependent and suitable for injection molding on conventional thermoplastics equipment. It is polyolefin based and recyclable within the manufacturing stream.

Key Features:

• UL listed for plastics components (U.S. and Canada)
• RTI of 95°C per UL 746B
• Outdoor suitability rating (f1) per UL 746C
• UL 94 V-1 flammability rating down to 1.5 mm
• UL 94 5VA flammability rating down to 1.8 mm
• Inclined-Plane Tracking time of 107 minutes at 2.5 kV
• Recyclable within the manufacturing stream

Processing Form:

• Injection Molding
• Multi Injection 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 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.