Golf ball incorporating positive hardness gradient thermoset polyurethane outer cover layer
申请人:Acushnet Company
公开号:US10252115B2
公开(公告)日:2019-04-09
Golf ball comprising a core having a hardness gradient and an outer cover layer having a microhardness gradient and being formed from a thermoset polyurethane material throughout, and having: i) a treated region that is contacted with a thermoset polyurethane microhardness-increasing solution consisting of an isocyanate portion and at least one non-aqueous solvent; and ii) an untreated region that is not contacted with the thermoset polyurethane microhardness-increasing solution. The treated region comprises the isocyanate portion, whereas the untreated region does not comprise the isocyanate portion. Treated region has a microhardness M1 that is greater than microhardness M2 of untreated region to define the outer cover layer positive microhardness gradient ΔM=M1−M2. The treated region may have a depth Dtr that extends inward from the cover outer surface and in some embodiments is less than a thickness of the untreated region. Treated region may alternatively extend from the inner surface toward outer surface.
高尔夫球,包括一个具有硬度梯度的球芯和一个具有微硬度梯度的外包层,整个外包层由热固性聚氨酯材料形成,并具有:i) 与由异氰酸酯部分和至少一种非水溶剂组成的热固性聚氨酯微硬度增加溶液接触的处理区域;以及 ii) 未与热固性聚氨酯微硬度增加溶液接触的未处理区域。处理区包括异氰酸酯部分,而未处理区不包括异氰酸酯部分。处理区的显微硬度 M1 大于未处理区的显微硬度 M2,以确定外覆盖层的正显微硬度梯度 ΔM=M1-M2。处理区可具有从覆盖层外表面向内延伸的深度 Dtr,在某些实施例中小于未处理区的厚度。处理区也可以从内表面向外表面延伸。