Hytrel® TPC-ET HTR8341C BK320

Hytrel TPC-ET HTR8341C BK320 is a medium-modulus thermoplastic polyester elastomer (TPC-ET) with a nominal hardness of 40D (37D at 15s). This black grade is formulated with fine-particle carbon black and contains a general-purpose stabilizer. Designed for blow molding and other processing methods requiring high melt viscosity, it offers excellent toughness, resilience and flexibility at low temperatures. Hytrel TPC-ET HTR8341C BK320 provides outstanding resistance to creep, impact and flex fatigue, superior tear strength and high abrasion resistance. The material also offers good resistance to oils, fuels, solvents and a wide range of industrial chemicals.

Key Features:

• Medium-modulus grade (40D)
• Black, heat- and light-stabilized formulation
• High melt viscosity for blow molding
• Excellent toughness and impact performance
• Outstanding creep, tear and flex fatigue resistance
• Good resistance to oils, fuels, solvents and industrial chemicals
• Stable melt behavior across a wide temperature range
• Plasticizer-free with long-term property retention

Processing Form:

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

Processing Notes:
Drying is recommended at 100°C for 3–4 hours to achieve a processing moisture content ≤0.08%. Hytrel TPC-ET HTR8341C BK320 has an optimal melt temperature of 240°C (range 230–250°C) and an optimal mold temperature of 45°C (40–50°C range). For blow molding, dry ≤110°C with moisture ≤0.02% and process at an optimal melt temperature around 235°C. For extrusion, dry at 100°C for 2–3 hours to reach ≤0.06% moisture and process at approx. 230°C. Hytrel is incompatible with acetal and PVC. Please refer to molding and extrusion guidelines for detailed recommendations.