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PNEUMATIC TIRE AND CROSSLINKED RUBBER COMPOSITION

  • US 20180297404A1
  • Filed: 10/21/2016
  • Published: 10/18/2018
  • Est. Priority Date: 10/27/2015
  • Status: Active Grant
First Claim
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1. A pneumatic tire comprising:

  • bead cores provided on a pair of right and left bead portions, respectively,a carcass ply extending from a crown portion to the both bead portions through both side wall portions and moored to the bead cores,an inner liner disposed at an inner side than the carcass ply in a direction of a tire diameter, anda tread disposed at an outer side than the carcass ply in a direction of a tire diameter and having a volume of the low density region of 35% or more at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5% or less at elongation by an applied stress of 3.0 MPa and a filler dispersibility index Δ

    G* shown by the following equation (I) of 3 or less;


    Δ

    G*=(G*(4%)−

    G*(256%))/G*(256%) 



    (I)wherein in the equation (I), G* (n %) indicates a shear modulus when an n % strain is applied,wherein the low density region is a region having a density of 0.1 to 0.8 times the density of a crosslinked rubber composition before the elongation, andwherein the void portion is a region having a density of 0 to 0.1 times the density of a crosslinked rubber composition before the elongation.

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