| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the leak of air in a tire to attain an extremely easy maintenance without requiring the periodic inspection supply of air pressure by integrally providing an air impermeable layer for airtightly covering the inner surface of a body, which consists of an ethylene-vinyl alcohol copolymer. SOLUTION: An annular air chamber C capable of filling and holding high pressure air is directly formed between the inner surface 1f of a tire body 1 and a rim R. The tire body 1 is integrally provided with an air impermeable layer S for airtightly covering the inner surface 1f extending over the whole surface, which consists of an ethylene-vinyl alcohol copolymer. The ethylene- vinyl alcohol copolymer is obtained by saponifying an ethylene-vinyl acetate copolymer, formed into a thin film having a thickness of about 15-30μm, which is then integrally connected and used as the air impermeable layer S. Since the leak of air from the air chamber C can effectively be prevented, the maintenance work can be facilitated.
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