What is the principle of puncture-proof tires?

[EthanLee]

The principle of puncture-proof tires is: using automatic CNC glue-spraying equipment to evenly apply MPN rubber material on the inner wall of the tire, forming a 3 to 5 mm protective coating. When sharp objects with a diameter of less than 6 mm penetrate the tire, they are quickly tightly wrapped by the MPN rubber coating without causing air leakage. Puncture-proof tires are also called self-repairing tires. They have a layer of high-molecular composite material on the inner wall of the tubeless tire, which is in a soft solid gel state. When the tire is punctured by sharp objects, the high-molecular composite material can quickly repair the perforation, ensuring no air leakage and safe vehicle operation. The functions of puncture-proof tires include: 1. Providing puncture and leak prevention, as well as bulletproof and buffering against tire bursts; 2. Reducing noise generated between the tire and the ground, alleviating vibrations during high-speed driving, and making the ride more comfortable.

[MacElena]

As a driver with over 20 years of experience, I understand exactly how puncture-proof tires work. They contain a special adhesive layer between the inner wall and the tread of the tire. During normal driving, this adhesive remains in a soft, liquid state. When a nail or piece of glass punctures the tire, the pressure pushes the adhesive to flow quickly and fill the hole, sealing it and preventing air from leaking. The principle is somewhat like squeezing toothpaste to cover a wound, except it automatically repairs small punctures. This is all thanks to material selection - engineers use polymer compounds that are both flexible and highly adhesive. I've used these tires on long trips and encountered multiple punctures on rough roads, yet the air pressure remained intact. I could simply drive to a repair shop for inspection without having to stop and change tires midway, saving a lot of hassle and safety risks. Of course, they won't work for large holes, but they generally handle everyday small punctures effectively.

[Harper]

I always use puncture-proof tires because they're simple and worry-free. The basic principle is that a self-sealing adhesive, like a thick fluid similar to honey, is added inside the tire. When a nail punctures it, the adhesive around the hole is pushed by the air pressure to seal the puncture, preventing air from escaping. My car is equipped with Michelin brand tires, and last time it got punctured by a screw without going flat—I just drove straight to the shop to get it fixed. I think this design is really smart, eliminating my worries about roadside blowouts. Regular tires lose air immediately when punctured, but these can maintain stable pressure for a while after minor damage, making driving safer. Tire manufacturers have also tested that this adhesive material can quickly seal punctures even at high speeds. Whether driving in the city or going on a suburban trip, I don’t have to worry about construction debris anymore—it can keep going for dozens of kilometers without issue.

[DiOlive]

From a material perspective, the core of puncture-proof tires lies in using innovative adhesive technology to form an internal isolation layer. When sharp objects penetrate, the adhesive fluid automatically flows into the puncture under pressure, acting like a sealant to plug the hole and prevent air leakage. The design considers fluidity to ensure self-repair of small punctures (e.g., under 3mm). The tire structure also reinforces the sidewalls to prevent rapid deformation. Having tested several brands, I found variations in adhesive formulations: some are thicker and more durable, suitable for long-distance driving; others react faster, ideal for city use. Overall, it reduces the risk of blowouts, but regular checks of tire pressure and adhesive condition are recommended.