- Look at the colors
× Pseudo-TPU is semi-bright yellowish, or milky white;
√ True TPU is transparent, translucent, or fluorescent blue, the higher the quality of TPU, the higher the clarity;
- Measure rebound
Cut an invisible suit 3 cm wide and 10 cm long, tear off the protective paper on the back and pull it at both ends.
× Fake TPU rebounds a little after stretching, but the rebound is slow;
√ True TPU has strong rebound ability after stretching, and can quickly return to its original shape, it is like a rubber band, and the stretching function is very good;
In addition: take a small piece of TPU car film, pull it vigorously until it shows the stringing, and then pour it on it with hot water (or sun exposure), it will recover.
- Light a sample, smell the odor/see the remnants
× The smell of fake TPU is pungent after incineration, poisonous/carbonized after incineration, hard, and will become a developing powder after hand twisting;
√ True TPU contains the aroma of different ethanol after incineration/turns black to form a viscous liquid after incineration, and there is adhesion and drawing after hand touching;
- Puncture test to see durability
× Fake TPU has no durability at all, partly due to the amount of plasticizer, the flexibility is different, but it will be whitened after stretching;
√ True TPU is durable, has excellent anti-penetration function, is not easy to penetrate, does not deform, etc., and is punctured with a screwdriver;
- Distinguish between good and bad glue/glue layers
A good glue is odorless, even if there is a subtle smell, it is a normal smell, and the residual glue layer will have some pungent chemical odor. Look at the adhesive viscosity, the thumb will be the glue layer can be jacked, and then use these raised pointed surfaces to quickly glue the flat surface, more than 50 times without glue is a good product, fake TPU on the glue 5 times on the glue drop!
Keeping in mind the above points, NAR PDI can help you to be aware when it comes to putting clothes on your car.
