Vehicle tire and method of making same

Details Vehicle tire and method of making same Vehicle tire and method of making same

B - Operations, Transporting

60

C

18/125, 152/84

B60C 15/00 (2006.01) B29D 30/00 (2006.01) B60C 5/01 (2006.01) B60C 7/00 (2006.01)

Patent

CA 1091563

ABSTRACT OF THE DISCLOSURE A vehicular pneumatic tire which, except for head cores, is composed solely of an elastomer blend strengthened by molecular orientation. The blend is a mono- olefin copolymer rubber with a polyolefin and sufficient curing agents to affect vulcanization when the blend is subjected to heat and pressure. The process for making the tire comprises performing an annulus of the elastomeric blend with bead cores and adjacent the edges, the diameter of the preform being essentially that of the bead diameter of the completed tire and the axial distance between the beads less than the transverse arcuate dimension of the completed tire. The preform is cured and while still hot following curing, is stretched and shaped to final size and the gener- ally toroidal form characteristic of conventional pneumatic tires with resulting biaxial molecular orientation, which orientation is retained in the tire by cooling it below the melting point of the polyolefin before removing the tire from the mold.

307416

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