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Excellent abrasion resistance for extended service life in demanding mechanical environments.
Outstanding low-temperature flexibility down to –40 °C without significant loss of elasticity.
Good processability via extrusion, injection molding, and calendering with minimal thermal degradation.
High transparency and gloss retention after processing and aging.
Compatible with common plastic substrates for co-extrusion and overmolding applications.
Medical tubing and fluid-handling components requiring biocompatibility and kink resistance.
Automotive interior trim, seals, and soft-touch overlays.
High-performance sporting goods including ski boots, bicycle grips, and protective gear.
Flexible industrial hoses and pneumatic connectors.
Consumer electronics casings and wearable device bands.
| Chemical Type | Aliphatic polyester-based thermoplastic polyurethane |
| Product Form | Pellets (free-flowing, uniform size) |
| Appearance | Translucent ivory granules |
| Shore A Hardness | 85 ± 2 |
| Melt Flow Index (230 °C/2.16 kg) | 12–16 g/10 min |
| Density | 1.18–1.20 g/cm³ |
| Moisture Content (as received) | ≤0.05 wt% |
| Key Features | Hydrolysis resistant, UV stable, non-yellowing |
Q1: What are the key processing advantages of HF-3698A compared to conventional TPU grades?
A: HF-3698A offers enhanced melt flow stability and reduced torque demand during extrusion and injection molding, enabling smoother processing at lower temperatures and shorter cycle times. Its balanced hardness and low melt viscosity support consistent profile formation in thin-wall applications.
Q2: Is HF-3698A suitable for overmolding onto rigid substrates like ABS or PC?
A: Yes — HF-3698A demonstrates good interfacial adhesion to common engineering thermoplastics when processed under optimized temperature and dwell time conditions. Surface preparation and mold design play critical roles in achieving durable bond integrity.
Q3: How does HF-3698A perform under repeated flexing or dynamic mechanical stress?
A: Designed for high resilience and fatigue resistance, HF-3698A maintains structural integrity and surface appearance after extended cyclic deformation, making it well-suited for applications such as flexible hinges, wearable components, and dynamic seals.
Q4: Can HF-3698A be used in applications requiring resistance to hydrolysis or elevated humidity?
A: HF-3698A is formulated with hydrolysis-stabilized polyester chemistry, providing improved retention of mechanical properties under warm, humid conditions compared to standard polyester TPUs — though prolonged exposure to high-temperature water remains a limiting factor.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
