The main difference between aliphatic and aromatic TPU film is that aliphatic TPU PPF film is UV-stable and resists yellowing, making it ideal for outdoor and high-clarity applications, while aromatic TPU is less expensive and mechanically stronger but will yellow with UV exposure. Comparison Table
| Property | Aliphatic TPU Film | Aromatic TPU Film |
|---|---|---|
| UV Resistance / Yellowing | Excellent; is UV-stable and resists yellowing | Poor; yellows and degrades with UV exposure/oxidation |
| Transparency/Clarity | High clarity; often optical grade | Typically has a yellowish tint, even when new |
| Mechanical Strength | Generally lower tensile strength | Higher tensile strength and abrasion resistance |
| Cost | More expensive | Less expensive/more cost-effective |
| Lifespan (Outdoor) | Long-lasting (often 7-10+ year warranties for PPF) | Shorter lifespan (yellows within 1-2 years outdoors) |
Key Decision Factors
- Aliphatic TPU Film: Choose this if UV exposure, color stability, and clarity are critical. It is the standard for premium, long-term outdoor applications.
- Ideal for: Automotive paint protection film (PPF), high-end medical devices, electronic screen protectors, and architectural films that must remain transparent and clear over time.
- Aromatic TPU Film: Choose this if cost is a primary concern and the film will be used in applications with minimal or no UV exposure.
- Ideal for: Indoor industrial uses, economical/short-term protective films, footwear components (soles), and as a base coat in multi-layer coating systems.
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