| 摘要 |
<p>The invention concerns a carcass reinforcement for tyre designed to support heavy loads comprising a composite fabric which includes a reduced hysteresis rubber composition and metallic cords reinforcing the composition. The elastomeric matrix thereof comprises natural rubber or a synthetic polyisoprene as major constituent, and a reinforcing filler comprising a carbon black which simultaneously satisfies the following conditions: (i) 45 <= CTAB specific surface in m<2>/g (according to ASTM D3765-80 standard) <= 70, (ii) 45 <= BET specific surface in m<2>/g (according to ASTM D4820-93 standard) <= 70, (iii) 45 <= iodine absorption number IA in mg/g (according to ASTM D1510-81 standard) <= 70 (iv) (BET surface/IA number) ratio <= 1.07, (v) 115 <= DBP structure value in ml/ 100 g (according to ASTM D2414-93 standard) <=170, (vi) 85 nm <= Stokes equivalent diameter dst in nm <= 145, wherein dst is the aggregate diameter corresponding to the maximum Stokes equivalent diameter in a distribution of aggregates, and (vii) D50/dst <= 0.0090. CTAB + 0.19, wherein D50 is the difference, in the aggregate distribution, between the Stokes equivalent diameters of two aggregates corresponding to a common frequency equal to 50 % of the maximum frequency of Stokes equivalent diameters, dst and D50 being measured by centrifugal photosedimentometry.</p> |
