Pneumatic tire, the belt of which is reinforced by a thermoplastic polymer film

摘要

Pneumatic tire, the belt of which is reinforced by a multilayer laminate comprising at least one multiaxially drawn thermoplastic polymer film, such as for example a biaxially drawn PET film, placed between and in contact with two layers of rubber composition, such as natural rubber. Preferably, the thermoplastic polymer film has, irrespective of the tensile direction considered, a tensile modulus E which is greater than 500 MPa, a maximum tensile stress σmax which is greater than 80 MPa, and an elongation at break Ar greater than 40%. The above thermoplastic polymer film, placed between two layers of diene rubber compositions, can especially be used in the belt of pneumatic tires as a perforation-resistant protective film.

主权项

1. A pneumatic tire, comprising a belt of which is that is reinforced by a multilayer laminate,
wherein said laminate comprises at least one multiaxially drawn thermoplastic polymer film placed between and in contact with two layers of rubber composition, wherein the thermoplastic polymer film has, irrespective of the tensile direction considered, a tensile modulus, denoted by E, which is between 2000 MPa and 4000 MPa, and a maximum tensile stress, denoted by σmax, which is between 100 MPa and 200 MPa, wherein the rubber composition has a secant tensile modulus, at 10% elongation, measured according to ASTM D412, which is between 4 MPa and 25 MPa, and wherein the belt of the tire is without a metallic working ply.