Hytrel® TPC-ET HTR8745LV BK320

Hytrel TPC-ET HTR8745LV BK320 is a medium-modulus, high-flow thermoplastic polyester elastomer (TPC-ET) with a nominal hardness of 43D (41D at 15s). This black grade is pigmented with fine-particle carbon black and contains a general-purpose heat and light stabilizer. Developed specifically for injection molding, it provides excellent toughness, resilience and flexibility at low temperatures, while maintaining strong mechanical performance at elevated temperatures. Hytrel TPC-ET HTR8745LV BK320 demonstrates outstanding resistance to creep, impact and flex fatigue, combined with very high tear strength and excellent abrasion resistance. It also offers good resistance to oils, fuels, solvents and many industrial chemicals.

Key Features:

• Medium-modulus grade (43D)
• Black, heat- and light-stabilized formulation
• High-flow behavior for injection molding
• Exceptional toughness and impact strength
• Outstanding creep, tear and flex fatigue resistance
• Good resistance to oils, fuels, solvents and industrial chemicals
• Very low brittleness temperature (–45°C glass transition)
• Plasticizer-free with long-term property stability

Processing Form:

• Injection Molding
• Extrusion
• Sheet Extrusion
• Other Extrusion
• Coating

Processing Notes:
Drying is recommended at 110°C for 2–4 hours to reach a processing moisture content ≤0.08%. Hytrel TPC-ET HTR8745LV BK320 has an optimal melt temperature of 240°C (range 230–250°C) and an optimal mold temperature of 45°C (45–55°C). For extrusion, dry at 100°C for 2–3 hours to reach ≤0.06% moisture and process at ~240°C. Prolonged or repeated drying is not recommended. Hytrel is incompatible with acetal and PVC. Please refer to the molding and extrusion guidelines for detailed recommendations.