Hytrel® TPC-ET 6356BKB

Hytrel TPC-ET 6356BKB is a medium-modulus thermoplastic polyester elastomer (TPC-ET) with a nominal hardness of 63D. This grade is a black cube blend of Hytrel 6356 and Hytrel 40CB, offering enhanced processability while retaining excellent toughness, resilience and mechanical stability. The material demonstrates outstanding resistance to creep, impact and flex fatigue, while maintaining flexibility at low temperatures and strong property retention at elevated temperatures. Hytrel TPC-ET 6356BKB contains a non-discoloring stabilizer and provides good resistance to oils, fuels, solvents and many industrial chemicals.

Key Features:

• Medium modulus with good stiffness
• Black cube blend (Hytrel 6356 + Hytrel 40CB)
• Excellent toughness and impact resistance
• Outstanding creep and flex fatigue resistance
• Good resistance to oils, fuels and industrial chemicals
• Non-discoloring stabilizer for enhanced color stability
• Light-stabilized for improved durability
• Plasticizer-free with long-term property retention

Processing Form:

• Injection Molding
• Film Extrusion
• Extrusion
• Sheet Extrusion
• Other Extrusion
• Casting
• Thermoforming

Processing Notes:
Drying is recommended at 100°C for 2–3 hours to achieve a processing moisture content ≤0.08%. Hytrel TPC-ET 6356BKB has an optimal melt temperature of 240°C (range 235–260°C) and an optimal mold temperature of 45°C (max. 55°C). For extrusion, drying at 90–110°C for 2–3 hours with a moisture target ≤0.06% is recommended, with an optimal melt temperature range of 225–240°C. Hytrel is incompatible with acetal and PVC. Please refer to molding and extrusion guidelines for detailed recommendations.