UNI-T AQII: INTRODUCTION
Super EPO
Provides more comfort and wet performance over the life of the tire.
Dual-Layer Tread (enhanced version)
More precise wet handling on a new tire and improves wet performance on a worn tire.
Super EPC
Counteracts the effects of heat giving more flexibility to the tire needed for wet performance.
UNI-T AQII: WEAR VS. PERFORMANCE
UNI-T AQ II improves the tire's performance when new. Super EPO minimizes the deterioration of tires new performance level in wet conditions during use and consequently provides a more consistent wet performance level.
UNI-T AQII: SUPER L.L. CARBON
Conventional L.L. Carbon:
Phenomena:
The Long Linkage construction of carbon makes the rubber resistant to wear. As the bonding of polymer and carbon black increases, the rubber becomes stiffer.
1st Possibility: Longer Linkage
Phenomena: The Longer Link construction of carbon makes the rubber even more resistant to wear
Problem: More bonding of polymer and carbon black will result in a higher stiffness of the rubber.
LESS WET PREFORMANCE
Consequence: Not possible to use for extending current L.L.Carbon
Solution: New Innovation: Super L.L. Carbon
Phenomena: The Longer Link construction of carbon makes the rubber even more resistant to wear.
New Technology: Can control polymer bonding to carbon black & keeps rubber flexibility
MAINTAINS WET PERFORMANCE. BETTER WEAR RESISTANCE AND EXCELLENT WET PERFORMANCE.
UNI-T AQII: PARTICLE Z
Wet Performance « » Silica Content »
Conflict:
1. Expensive.
2. Difficult to Process.
3. Loose wear property
Solution: Innovative Particle Z (filter agent)
Adhesion Index on Wet Surface
Filler Particles Effect on Wet Performance
Deformation capability at tire / road surface area even when small force is applied (wet) = BETTER GRIP
UNI-T AQII: HYDRO EVACUATION SURFACE (H.E.S.)
H.E.S. Reduces flow resistance of water along Groove walls
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Application: Potenza S-03 Pole Position |
Simulation:
Conventional groove wall design: Turbulence of water flow
Hydro Evacuation Surface groove wall design: Smooth & Efficient water flow
Conventional contact patch design did always have a high concentration of pressure on the edges of the contact patch itself as well as each single block.
Reduction of pressure-concentration at block edge. New CSC will improve WET & DRY Handling, Riding Comfort and Wear.
Conventional Geometry
New optimal 3D Geometry CSC
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Convex: optimal for dry surface (used on S-03)
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Concave: optimal for ice surface
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Super E.P. Compound
Super E.P. Compound consists of 3 agents, controlling technology to prevent tread rubber from hardening:
RE-CROSSLINKING BY SULFUR
Effect/Process:
Solution:
EPC additive works more effectively to prevent re-crosslinking, even the mechanism is still the same as that of UNI-T AQ.
After Use....
POLYMER CHAIN SCISSION & RE-POLYMERIZATION
Effect/Process:
Solution:
OIL MIGRATION
Effect/Process:
Solution:
Rubber contains oil, which tends to migrate to the under-tread / casing during a tires life. The surface which loses oil, becomes harder. Bridgestone has replaced partly the oil with a substance that comprises larger molecules which migrate less easily through the rubber.
Enhanced Dual Layer Tread
