Hytrel® TPC-ET HTR4275 BK600

Hytrel TPC-ET HTR4275 BK600 is a medium-modulus thermoplastic polyester elastomer (TPC-ET) with a nominal hardness of 55D (50D at 15s). This black grade is pigmented with fine-particle carbon black and formulated for superior UV stability. Designed for blow molding and other high-viscosity processing methods, it provides excellent toughness, resilience and low-temperature flexibility while maintaining strong mechanical performance at elevated temperatures. Hytrel TPC-ET HTR4275 BK600 demonstrates outstanding resistance to creep, impact and flex fatigue, very high tear strength, and excellent abrasion resistance. It also shows good resistance to oils, fuels, solvents and a broad range of industrial chemicals.

Key Features:

• Medium-modulus grade (55D)
• Black formulation with enhanced UV stability
• High melt viscosity for blow molding
• Excellent toughness and impact resistance
• Outstanding creep, tear and flex fatigue resistance
• Good resistance to oils, fuels, solvents and industrial chemicals
• Very low brittleness temperature (–30°C Tg)
• Plasticizer-free with long-term property retention

Processing Form:

• Injection Molding
• Extrusion
• Blow Molding
• Thermoforming

Processing Notes:
Drying is recommended at 100°C for 2–3 hours to reach a processing moisture level ≤0.06%. For extrusion: process at a melt temperature range of 205–220°C. For blow molding: moisture must be ≤0.02%; shrinkage for blow-molded parts is 1.5–2.0% (parallel) and 2.2–2.7% (normal) at 1.0 mm thickness. Hytrel is incompatible with acetal and PVC. Refer to the molding and extrusion guidelines for complete recommendations.