Low rolling resistance tire and its manufacturing technology

摘要

The tire includes a top reinforcement including:-Working reinforcement, including one layer of working reinforcement,-The fretting reinforcement arranged radially outside the working reinforcement comprises at least one circumferential spiral wound fretting reinforcement member (170) so as to extend axially from one axial edge of the fretting reinforcement to another axial edge.The steel wire fretting reinforcing member (170) comprises:-Two strands (1701, 1702) of aromatic polyamide or aromatic copolyamide and one strand (1703) of aliphatic polyamide or polyester, or-Three strand multi fiber polyester,Each multifilament strand (1701, 1702, 1703) is spirally wound around the spindle (W) shared by three multifilament strands (1701, 1702, 1703),Fretting bars have a tangent modulus of 1.3% elongation in the range of 200 to 650 Dan / mm.Abstract figure: Figure 5