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Excellent abrasion resistance for extended service life in demanding mechanical environments.
Outstanding oil and grease resistance, maintaining performance in lubricated or hydrocarbon-exposed conditions.
High tensile strength and elongation at break, enabling reliable elasticity and load-bearing capability.
Good low-temperature flexibility down to –30 °C, ensuring dimensional stability and resilience in cold climates.
Easy processability via extrusion, injection molding, and calendering without requiring plasticizers or secondary additives.
Automotive interior trim components including instrument panel skins and door armrests.
Industrial hoses and fluid transfer tubing for pneumatic and hydraulic systems.
Wear-resistant conveyor belts and modular belt components in material handling equipment.
Protective casings and gaskets for electronic enclosures and industrial control housings.
Flexible couplings and vibration-damping mounts in precision machinery.
| Chemical Type | Thermoplastic Polyurethane (TPU), polyester-based |
| Product Form | Pellets |
| Appearance | Off-white to light amber, free-flowing granules |
| Density | 1.20–1.23 g/cm³ |
| Hardness (Shore A) | 90 ± 2 |
| Melt Flow Index (230 °C/5 kg) | 10–14 g/10 min |
| Tensile Strength | ≥35 MPa |
| Elongation at Break | ≥450 % |
Q1: What are the key processing advantages of HF-3690A compared to conventional TPU grades?
A: HF-3690A 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 optimized rheology supports consistent dispersion in compound formulations and minimizes die swell in profile extrusion.
Q2: Is HF-3690A suitable for applications requiring high abrasion resistance and flexibility at low temperatures?
A: Yes — HF-3690A is engineered with a balanced hard-segment/hard-segment distribution that delivers excellent resistance to wear, cut, and flex fatigue, while maintaining elasticity and impact resilience down to -20 °C. It is commonly selected for demanding dynamic components such as rollers, seals, and automotive interior trims.
Q3: Can HF-3690A be blended with other thermoplastics or elastomers?
A: HF-3690A exhibits good compatibility with common engineering thermoplastics such as ABS, PC, and certain polyesters, especially when used as a toughening modifier. Compatibility with other TPUs or TPEs is generally favorable, though phase morphology and final properties depend on processing conditions and formulation ratios.
Q4: How should HF-3690A be dried prior to processing?
A: Like most polyester-based TPUs, HF-3690A is hygroscopic and must be thoroughly dried before melt processing. Recommended drying conditions are 80–90 °C for 3–4 hours in a dehumidifying hopper dryer. Inadequate drying may lead to surface defects, reduced mechanical performance, or hydrolytic degradation during processing.
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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
