Santoprene® TPV 121-70B260

Santoprene TPV 121-70B260 is a medium hard, black thermoplastic vulcanizate (TPV) in the thermoplastic elastomer (TPE) family. This material combines a low coefficient of friction with good bonding to TPV and EPDM rubber. It offers excellent processability due to high shear thinning behavior for injection molding of complex geometries and excellent surface aesthetics providing color harmony with extruded profiles, without surface bleeding or change of friction after heat aging. This grade has been designed for complex corner molding and end caps of automotive dense extruded weatherseals, either in TPV or EPDM rubber.

Key Features:

• Specially formulated to replace thermoset EPDM rubber in automotive GRC corner molding applications
• Designed for shorter processing cycle time compared to thermoset EPDM rubber
• Adheres to vulcanized EPDM rubber and TPV
• Built-in low COF properties
• Good flowability with excellent surface aspect

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 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.