What is the difference between PCU and TPU?

2026-04-11

I. The essence of materials

TPU (Conventional Thermoplastic Polyurethane)

The mainstream types are polycaprolactone-based or polyether-based TPU.
The soft segments in the molecular structure are composed of polyester/polyether polyols, which are currently the mainstream standard material in the market.

PCU (Polycarbonate-based thermoplastic polyurethane)

It belongs to the high-end segment of TPU, with the soft segment being polycarbonate polyol.
The technology originates from aerospace, and the manufacturing process is extremely difficult.

II. Performance Comparison

characteristic	TPU	PCU
Hydrolysis resistance	Good	Extremely strong (approximately 3 times stronger), more stable in high temperature and high humidity environments.
Yellowing resistance / Weather resistance	Excellent (5-10 years)	Superior performance, with better resistance to UV rays and superior high/low temperatures.
Toughness / Softness	High (elastic modulus 8-10.5MPa)	Higher (softer) (elastic modulus 5.5-6.5MPa), making edge wrapping easier during construction.
Self-repair capability	There are (shallow scars from heat repair).	More powerful, with higher repair speed and depth limits.
Stain-resistant / Corrosion-resistant	good	Superior coating adhesion, resistant to penetration from markers, acid rain, etc.
Surface brightness	High Glossy	Ultra-high brightness and gloss are significantly better than traditional TPU.
Service life	5-10 years	15 years,Extended warranty provided
Price	Mid-to-high-end	Top-tier (20%-50% higher than traditional TPU)

III. How to Choose

Choose traditional TPU:
- Moderate budget, seeking mainstream high-end protection (5-10 years).
- Daily urban driving with relatively stable environmental conditions (humidity/temperature).
- Prioritizing cost-effectiveness, meeting core requirements for scratch resistance, self-healing, and anti-yellowing.
Choose PCU:
- For those with a sufficient budget, seeking top-tier, ultra-long-term protection (10+ years).
- Suitable for high-temperature and high-humidity areas in southern/coastal regions, or environments with extreme temperature differences.
- For luxury and performance cars, prioritizing ultimate brightness, ease of application, and stain resistance.

In summary: PCU is a comprehensive upgrade from TPU, leading in all aspects of hydrolysis resistance, weather resistance, flexibility, brightness, and lifespan. While traditional TPU is already excellent, PCU represents the pinnacle of perfection.

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