US Patent 9,925,425
Golf ball incorporating at least three adjacent ionomeric and/or HNP-based layers having multiple related property gradients there between
Abstract
Golf ball having at least three layers comprising an ionomeric and/or HNP composition, wherein for each two adjacent layers, a relationship is established between a ratio of the volumes of the two adjacent layers and a ratio of the percent neutralizations of those two layers such that the volumes and % neutralizations of all layers are interrelated and interdependent to produce unique and desirable playing characteristics. In one embodiment, each of T layers, wherein T≥3, has a different volume “V” and comprises an ionomeric/HNP composition having a different % neutralization “N”; and wherein each of n inner layers of the T layers (n<T) has an adjacent surrounding layer n+1 such that a volume Vn and a % neutralization Nn of each inner layer and a volume V(n+1) and % neutralization N(n+1) of each adjacent surrounding layer n+1 satisfy the relationship (V(n+1)−Vn)/V(n+1)≤(N(n+1)−Nn)/Nn.