Tyre comprising a self-sealing layer having a radial creep gradient

摘要

A pneumatic tire includes an internal sealing layer, which partially delimits an internal volume of the pneumatic tire, and a self-sealing layer formed of a self-sealing product. The self-sealing layer is positioned radially on an inside region with respect to the internal sealing layer, and has a creep resistance indicator that decreases radially outwards, i.e., towards outside of the pneumatic tire.

主权项

1. A pneumatic tyre comprising:
an internal sealing layer structured to partially delimit an internal volume of the pneumatic tyre; and a self-sealing layer formed of at least one self-sealing product, the self-sealing layer being positioned radially on an inside region with respect to the internal sealing layer, and the self-sealing layer having a creep resistance indicator that decreases radially towards outside of the pneumatic tyre, wherein the self-sealing layer includes first and second layers respectively formed of first and second self-sealing products, each of which contains a diene elastomer, a hydrocarbon resin, a liquid plasticizer, and optionally a filler, wherein the first layer is positioned radially on an inside region with respect to the second layer, wherein the first self-sealing product has a creep resistance indicator greater than a creep resistance indicator of the second self-sealing product, and wherein the first layer extends axially on an outside region beyond the second layer.