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Excellent abrasion resistance for extended service life in demanding mechanical environments.
Outstanding low-temperature flexibility down to –30 °C without significant loss of elasticity.
Good oil and grease resistance, maintaining dimensional stability in contact with hydrocarbon-based fluids.
High tensile strength and elongation at break, enabling reliable performance under dynamic stress.
Process-friendly melt flow behavior suitable for extrusion, injection molding, and calendering.
Automotive interior trim components including instrument panel skins and door armrests.
Industrial hoses and pneumatic tubing requiring flexibility and pressure resilience.
Protective coatings and overmolding for electronic enclosures and handheld tools.
High-performance seals and gaskets for HVAC and fluid handling systems.
Specialty footwear midsoles and outsoles demanding rebound and wear resistance.
| Chemical Type | Aliphatic polyester-based thermoplastic polyurethane |
| Product Form | Pellets |
| Appearance | Off-white to light yellow translucent granules |
| Density (g/cm³) | 1.18–1.20 |
| Melt Flow Index (210 °C/2.16 kg, g/10 min) | 10–14 |
| Tensile Strength (MPa) | 32–36 |
| Elongation at Break (%) | 520–580 |
| Hardness (Shore A) | 83–85 |
Q1: What are the primary processing methods suitable for HF-4085AU?
A: HF-4085AU is designed for melt-processing techniques including extrusion, injection molding, and blow molding. Its balanced melt viscosity and thermal stability support consistent flow and good surface finish across standard TPU processing equipment.
Q2: Is HF-4085AU compatible with common engineering thermoplastics for alloying or blending?
A: Yes — HF-4085AU demonstrates good compatibility with polyesters (e.g., PET, PBT) and certain polyolefins when used with appropriate compatibilizers. Blending is typically employed to enhance flexibility, impact resistance, or processability without compromising mechanical integrity.
Q3: How does HF-4085AU perform under repeated flexing or dynamic mechanical stress?
A: As a high-performance aromatic TPU elastomer, HF-4085AU offers excellent resilience, abrasion resistance, and fatigue endurance. It maintains structural integrity and elasticity over extended cycles of bending, twisting, or compression—making it well-suited for demanding applications such as automotive trim, wearable components, and industrial bellows.
Q4: Does HF-4085AU require drying before processing, and what are the recommended conditions?
A: Yes — like most TPU grades, HF-4085AU is hygroscopic and must be thoroughly dried prior to melt processing. Standard practice involves drying at 80–90 °C for 2–4 hours using a desiccant dryer, with moisture content targeted below 0.05% to prevent hydrolysis and surface defects.
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