| abstract |
The reinforced tyre which is characterized in that its carcass material consists of the cord composed substantially of polyethylene 2,6-naphthalate, said cord, as set in the tyre, having the twisting coefficient, K-value, of 1600 to 3300, the modulus under 2% extension of 40 - 160 g/denier, and the dry heat shrinkage of no greater than 3% when exposed to the temperature of 150*C. for 30 minutes, with the definition of K as below: K T square root D in which T denotes the number of folded twist per 10 cm of the cord, and D denotes the total denier of the filaments constituting the cord. |