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DUAL CORE GOLF BALL HAVING A SHALLOW 'POSITIVE HARDNESS GRADIENT' THERMOPLASTIC INNER CORE AND A STEEP 'POSITIVE HARDNESS GRADIENT' THERMOSET OUTER CORE LAYER
DUAL CORE GOLF BALL HAVING A SHALLOW 'POSITIVE HARDNESS GRADIENT' THERMOPLASTIC INNER CORE AND A STEEP 'POSITIVE HARDNESS GRADIENT' THERMOSET OUTER CORE LAYER
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机译:双芯高尔夫球具有浅的“正硬度梯度”热塑内层和陡峭的“正硬度梯度”热塑外层
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摘要
A golf ball including a highly-neutralized thermoplastic inner core layer having a geometric center hardness less than a surface hardness to define a first hardness gradient, an outer core layer formed from a homogenous thermoset composition and having an interior hardness substantially less than an outer surface hardness to define a second hardness gradient, an inner cover layer, and an outer cover layer. Both the first and second hardness gradients are positive and a slope of the second hardness gradient is greater than a slope of the first hardness gradient to define a shallow hardness gradient inner core and a steep hardness gradient outer core layer.
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