Hytrel® TPC-ET HTR8908 BK320

Hytrel TPC-ET HTR8908 BK320 is a soft-hardness, halogen-free flame-retardant thermoplastic polyester elastomer (TPC-ET) with a nominal hardness of 28D (Shore D). This black grade delivers strong flammability performance, achieving V-2 at 1.6 mm and V-1 at 3.2 mm according to IEC 60695-11-10. The material offers excellent toughness, resilience and flexibility at low temperatures, along with very high impact resistance even down to -40°C. Hytrel TPC-ET HTR8908 BK320 provides outstanding resistance to creep, flex fatigue and tearing, and offers good resistance to oils, solvents and many industrial chemicals. It is heat-stabilized, light-stabilized and especially suitable for thin-wall wire & cable extrusion.

Key Features:

• Halogen-free flame-retardant formulation
• IEC 60695 performance: V-2 at 1.6 mm, V-1 at 3.2 mm
• Soft hardness (28D) with high flexibility
• Exceptional impact resistance down to -40°C
• Outstanding creep, tear and flex fatigue resistance
• Good resistance to oils, fuels, solvents and industrial fluids
• Black, heat-stabilized and light-stabilized grade
• Suitable for thin-wall wire & cable extrusion
• Plasticizer-free with long-term property retention

Processing Form:

• Injection Molding
• Extrusion
• Other Extrusion
• Calendering
• Casting
• Thermoforming
• Extrusion – Wire & Cable

Processing Notes:
Drying is recommended at 100°C for 2–3 hours to reach a processing moisture content ≤0.08%. Hytrel TPC-ET HTR8908 BK320 has an optimal melt temperature of 215°C (range 200–230°C) and a molding temperature of 30–40°C. For extrusion, dry at 70–90°C for 2–3 hours to achieve ≤0.06% moisture and process at a melt temperature of 200–235°C. Hytrel is incompatible with acetal and PVC. Please refer to the molding and extrusion guidelines for detailed recommendations.