RADIAL PLY PNEUMATIC TYRE CASING

摘要

FIELD: tyre industry; road vehicle pneumatic tyres. SUBSTANCE: ratio of thickness to width of breaker thread is from 0.25 to 0.8, and bending rigidity, at equal thread strength, is 1.5-4.0 times as great as bending rigidly of threads of twisted metal cord or flat wire. Shaped tubber bands are laid under edges of breaker made of two or more crossing layers of rubberized metal threads of rectangular section. Ratio of thickness of middle part of band to breaker thickness is within 2.0 and 3.5 and width between thin edges of band and breaker width is within 0.5 and 0.65. EFFECT: improved quality of tyre. 3 cl, 1 tbl, 1 dwg øøø1