| 摘要 |
PROBLEM TO BE SOLVED: To reduce the weight of a tire as an internal pressure is held. SOLUTION: In a film situated inside a carcass formed throughout a space between a pair of beads, the film is formed of thermoplastic resin and the thermoplastic resin film has characteristics described at under-mentioned (a)-(d). (a) Cutting ductility is 80% or more; (b) tension per with of 1 cm in the case of 5% elongation is 1500 g or less; (c) a tension in the case of 50% elongation is 100% or less of tension in the case of 5% elongation; (d) a gas penetration factor is 5.0×10-12 cm3.cm.cm2.s.cmHg or less.
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