Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

DuPont Hytrel E4778 TPEE

DuPont Hytrel E4778 is a high-performance thermoplastic elastomer (TPEE) offering exceptional elasticity, heat resistance up to 150°C, and outstanding chemical/moisture resistance. Ideal for automotive, industrial, and consumer applications requiring durability and dynamic fatigue resistance. Combines rubber-like flexibility with thermoplastic processability for efficient injection molding and extrusion.
  • dupont hytrel e4778 tpee_b118ad1c
  • dupont hytrel e4778 tpee_b118ad1c

Features Of DuPont Hytrel E4778 TPEE

  1. Excellent balance of toughness and flexibility across a wide temperature range (–40 °C to 150 °C short-term)

  2. Outstanding resistance to oils, greases, and many common automotive fluids

  3. Good melt processability for injection molding and extrusion with low moisture sensitivity

  4. High resilience and fatigue resistance for dynamic, repetitive-use components

  5. Enhanced flow characteristics compared to higher-hardness TPEE grades, enabling thin-wall part production

Typical Applications Of DuPont Hytrel E4778 TPEE

  1. Automotive under-hood air ducts and fluid handling hoses

  2. Powertrain grommets, bushings, and vibration-damping mounts

  3. Industrial pneumatic tubing and connector seals

  4. Consumer appliance components requiring repeated flexing and thermal stability

  5. Medical device housings and ergonomic grips where chemical compatibility is critical

Specifications Of DuPont Hytrel E4778 TPEE

Chemical TypeThermoplastic Polyester Elastomer (TPEE)
Product FormNatural-colored pellets
AppearanceOpaque, off-white to light tan granules
Hardness (Shore D, ASTM D2240)48 ± 2
Density (ASTM D792)1.16 g/cm³
Melt Flow Rate (230 °C/2.16 kg, ASTM D1238)28–36 g/10 min
Primary ApplicationsDynamic sealing, flexible ducting, vibration isolation
Key FeaturesOil resistance, thermal stability, high elasticity, processing ease


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