Tire wheel assembly and run-flat core
A runflat and assembly technology, applied in the direction of wheels, pneumatic tires, tire parts, etc., can solve problems such as increased cavity resonance sound, achieve the effect of reducing friction and improving durability
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[0051] Including a pneumatic tire with a tire size of 215 / 55R16 and a wheel with a rim size of 16×7JJ, and inserting a leak air composed of a pair of elastic rings and an annular shell into the cavity formed between the pneumatic tire and the rim of the wheel In the tire wheel assembly of the core, a tire wheel assembly in which a sound absorbing material was provided on the annular shell of the runflat core was prepared (Examples 1 and 2). In addition, for comparison, a tire and wheel assembly (conventional example) in which no sound absorbing material was provided on the annular shell of the runflat was prepared.
[0052] In Example 1, a polyurethane foam having a tear strength (JIS K6301) of 4.5 N / cm and a sound absorption rate at 200 Hz (JIS A1405) of 18% was used as the sound absorbing material. In Example 2, as a sound absorbing material, a polyurethane foam having a tear strength (JIS K6301) of 5.5 N / cm and a sound absorption rate at 200 Hz (JIS A1405) of 12% was used. ...
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