Invisible car jacket TPU material decryption

The quality of the invisible car jacket must be affected by the material. For example, a feature of the TPU material is heat repair, which can withstand minor scratches and leave no traces. Therefore, if you want to buy an invisible car jacket, you must first know what material it is. Yes, the material used in the YEECAR stealth car jacket is aliphatic TPU. Some people may have questions. What is this aliphatic TPU and what is the difference between it and the TPU we often say?

Aliphatic TPU of YEECAR Stealth Car Jacket

Aliphatic TPU is actually a branch of TPU. The two are subordinate. The full name of TPU is called thermoplastic polyurethane elastomer. Its structure is not fixed. It can be divided into two types according to different chemical properties: aliphatic and aromatic.

1. Aromatic TPU: containing benzene ring, also known as MDI system, MDI benzene ring is directly connected with isocyanate group, the large pi bond of benzene ring and isocyanate group form a conjugate structure, but long-term exposure to sunlight (ultraviolet Function), the isocyanate group decomposes to generate aniline structure, aniline rearranges, and forms other color groups. The intuitive performance is that the color changes from transparent to yellowing. This is the case for most TPUs in the world. Yellowing is the product characteristic ( For example, the TPU protective case that you buy with a mobile phone), although this color change does not have much impact on its basic performance.

2. Aliphatic TPU: A rare species of TPU. Only a few manufacturers in the world have the ability to mass produce. Its structure has no MDI benzene ring, is not easily affected by the environment, and can be permanently non-yellowing. (Note: But the invisible car jacket is not pure TPU. It also contains glue and other materials, which can only be resistant to yellowing. Of course, some brands that use aliphatic TPU materials will provide warranty for yellowing)

The degree of yellowing of aliphatic TPU and aromatic TPU in the UV test is as follows:

Although they belong to the same TPU material, they have shown completely different results after long-term UV exposure. Only aliphatic TPU can maintain the effect of yellowing resistance. This is also the material advantage of YEECAR invisible car jackets. Where.