The quality of radial tires is particularly sensitive to the process conditions. Thus the production process should be strictly controlled to ensure good quality.
1. Temperature and humidity
All steel radial tire factory must keep constant temperature, especially in the calendering, cutting and curing workshop. Usually the temperature is maintained at 22 degrees Celsus to have specific control of the part size and rubber quality.
The humidity is usually kept below 50%. If higher, the steel cord will rust or cannot bond with rubber. If lower, it will not be comfortable for the workers.
2. UV and O3
All radial tire semi-components should be isolated from UV and O3 to avoid aging of rubber. The building of workshop should pay special attention to lighting.
Dust will hinder the bonding of rubber. The radial tire workshop should be strictly dust free. Transportation vehicles inside and outside should be separated. Besides, there ought to be control procedures against dust brought in by workers.