| 摘要 |
In a tyre for motor-vehicles, an auxiliary support element (9) is interposed between the carcass ply (3) and belt structure (6), which element is employed during the manufacturing step of the belt structure (6) in order to stably retain, on the sectors of a comb drum (10), the coils (7a) consecutively formed by winding of an inextensible cord (7). The auxiliary support element (9) is made in the form of an elastomeric sheet containing short aramid fibres in an amount included between 1 and 10 phr, to increase the stretchability of said element without impairing the adhesiveness features of same. The introduction of the short aramid fibres in the blend enables the thickness of the auxiliary support element (9) to be reduced until values of 0.075 mm. <IMAGE> |
