Pneumatic radial tire having a folded belt including a polyvinyl

Details Pneumatic radial tire having a folded belt including a polyvinyl Pneumatic radial tire having a folded belt including a polyvinyl

1987-12-15

1991-04-09

Weston, Caleb

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152528, 152536, 152541, 152554, B60C 926, B60C 1500

Patent

active

050056263

ABSTRACT:
A pneumatic radial tire having a low noise and an improved cornering stability has a belt structure of at least two belt layers composed of at least one layer containing cords each obtained by twisting organic fibers and at least one layer containing steel cords, at least one of the organic fiber cord layers being interposed between the steel cord layer and a tread at a state that both transversely outermost end portions are folded inward. This organic fiber cord is a cord obtained by twisting high strength, high modulus polyvinyl alcohol fibers and has particular twisting coefficient and strength. The tire further satisfies a particular relation between a height of a turnup portion of a carcass ply around a bead portion and a tensile stress at 50% elongation of a bead filler rubber reinforcing the bead portion at room temperature.

REFERENCES:
patent: 3612138 (1971-10-01), Ravenhall
patent: 3826298 (1974-07-01), Tanaka et al.
patent: 3831656 (1974-08-01), Senger et al.
patent: 3851693 (1974-12-01), Takemura et al.
patent: 3854515 (1974-12-01), Takemura et al.
patent: 3874436 (1975-04-01), Hashida et al.
patent: 3961657 (1976-06-01), Chrobak
patent: 4170255 (1979-10-01), Greiner et al.
patent: 4603083 (1986-07-01), Tanaka et al.
patent: 4627479 (1986-12-01), Shurman et al.
Samuel K. Clark, ed., "Mechanics of Pneumatic Tire", National Bureau of Standard Monograph 122, Nov. 1971, pp. 355-369.

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