Semi Steel Radial R17 Tire Curing Bladder(PCR)NO.11

tire curing bladders have a certain elongation ratio when used in vulcanized tires. Generally, radial elongation R=inner diameter of the outer tire (DK)/diameter of the bladder in its original state (DB). The radial extension value of the B-type bladder in a bias tire is 1.6-1.85, and the extension ratio of the A-type and B-type tires in a bias tire is similar. The value of the radial tire is 1.10-1.15, and the allowable value is 1.05-1.20. In addition to the diameter of the bladder, there is also an important condition to note when selecting bladders and tires, which is the circumference of the bladder cross-section. The circumference extension of the bladder section L=the circumference of the inner contour of the outer tire section/the circumference of the bladder section. The elongation of the cross-section circumference of the bladder should be as small as possible, and the elongation from the inner contour of the tire should not exceed 20%. Generally, the cross-section circumference of B-type bladders for light truck tires is 1.08-1.15%. The elongation value of the cross-section perimeter of heavy-duty tires is 1.02-1.04, while the elongation value of the cross-section perimeter of A-type bladders is relatively large. Both diagonal and radial tires are around 1.1-1.15. bladders are working conditions for repeated stretching. So the service life is not only affected by high temperature and oxidation resistance, but also by the deoxygenation of the tire company's hot water. This has specific indicator regulations. Generally, the oxygen index content of superheated water does not exceed 0.05PPm (excluding nitrogen vulcanization).