TYRE WITH A SELF-SEALING PLY

摘要

#CMT# #/CMT# The tire (1) has a crown (2) provided radially outside of a tire tread (8), and two sidewalls (3), whose internal surface and the crown forming an internal wall of the tire. A portion of the wall is covered by a self sealing layer (11) made up of styrene thermoplastic elastomer. The self sealing layer has a loss factor lower than the 0.2, and a dynamic modulus lower than the inflation pressure of the tire, for temperature ranging between 30 and 100 degree Celsius. The loss factor and dynamic modulus are measured at the 10 hertz frequency. #CMT#USE : #/CMT# Tire for public work and private vehicle. #CMT#ADVANTAGE : #/CMT# The self sealing layer improves the resistance of the tire against cuts and perforations and improves the speed of covering, during the removal of the pin from the tire. The layer improves the elastic mechanical characteristics of the tire, in the wide temperature range. The dynamic modulus of the tire is lesser than the inflation pressure of the tire, thus improving the stability of shape of the tire during high speed driving at high temperature. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic and radial sectional view of a tire embedded with the self sealing layer. 1 : Tire 2 : Crown 3 : Sidewalls 4 : Tire bead 8 : Tire tread 11 : Self sealing layer #CMT#POLYMERS : #/CMT# The elastomer is chosen from the following co-polymer group such as styrene-butadiene-styrene, styrene-isoprene-styrene, styrene-ethylene-butylenes-styrene, styrene-ethylene-propylene-styrene and styrene-ethylene-ethylene-propylene-styrene.