Nitrogenous vulcanization refers to the use of low-pressure nitrogen (0.4-0.5MPa) for tire molding. In the positive vulcanization process of tires, the capsule is filled with a mixture of high-pressure steam and high-pressure nitrogen (2.5MPa), and the external temperature is vulcanized by low-pressure steam. Both methods use high temperature to change the molecular structure of natural rubber chain into a network structure. At the same time, the layers of bands are tightly combined and the pattern is formed on the tread. Nitrogen vulcanization, tire performance indicators such as mileage, durability, uniformity, penetration ability test, are higher than the traditional superhot water vulcanization performance indicators.

(5) The performance of nitrogen is stable, the heat insulation performance is very good, greatly improving the use of hot water vulcanization heat loss, saving energy.

(6) The high purity nitrogen eliminates the phenomenon of early vulcanization of the capsule, and the average life of the capsule is increased by 10%.

(7) The large amount of steam originally used to heat superhot water is eliminated, reducing the utility investment necessary to meet the process.

(8) It reduces the consumption of water and electricity, and eliminates the phenomenon of running, bubbling, dripping and leaking, so as to meet the requirements of environmental protection operation.

♦ The advantage of tire nitrogen charging

Compared with air-filled tires, filling with dry, low-oxygen nitrogen will stabilize the pressure in the tire, greatly reduce the probability of tire blowout, and improve the safety of high-speed driving.

A. Reduce the chance of blowout and improve driving safety

1. Nitrogen is an inert gas, which avoids oxidation of the rim and tire fabric layer. 

2. The speed of nitrogen penetration into the tire wall is only 1/6 of oxygen, so the tire pressure retention ability of nitrogen-filled tires is strong, and there is no need to regularly replenish air, reduce friction and save oil. 

3. For tubeless, dry nitrogen is filled to avoid corrosion of the wheel by water vapor and high oxygen content.

B.Extend the service life of the tire

1. Nitrogen-filled tires can maintain a stable pressure for a long time, extending the life of the tire. 2. The oxygen and water content in the inner cavity of the tire filled with ordinary air is high, and the oxygen gradually penetrates into the deep wall from the inner cavity of the tire, and the oxygen molecules react chemically with the unsaturated molecules in the rubber, resulting in the aging phenomenon of the rubber until it is scrapped. The nitrogen concentration of nitrogen-filled tires is at least 95%, and the content of oxygen in tires is low. Nitrogen protects the rubber from aging and prolongs the service life of the tire.

3. Ordinary air filling pressure compressed air contains a certain amount of oil, pollution and gradually swelling of the inner tube reduce the service life, dry filling can extend the service life of the tire.

C.Reduce abnormal tire deformation to save additional fuel consumption.

The leakage of air pressure in the tire leads to the increase of additional tire deformation, the increase of rolling resistance, and the increase of fuel consumption. Because the tire pressure can remain stable for a long time, the abnormal deformation of the tire in use is reduced, and the fuel consumption of the vehicle is reduced. It saves exhaust emissions and protects the environment.