Multi-layer golf ball
View Patent ↗Multi-layer golf balls having a relatively hard outer core surrounding a relatively soft, low compression inner core are provided. The inner core generally has a compression of less than 50 and the inner core and outer core generally have a combined dual core compression of 50 or greater. The outer core generally has a Shore C hardness of 80 or greater. A cover, which can be a single-, dual-, or multi-layer cover, is provided to surround the outer core. A moisture barrier layer is optionally provided between the outer core and the cover. The moisture vapor transmission rate of the moisture barrier layer is preferably less than the moisture vapor transmission rate of the cover.
1. A golf ball consisting of the following three layers:
a dual layer core having a diameter of from 1.52 inches to 1.66 inches and consisting of an inner core layer and an outer core layer, the inner core layer having a compression of 40 or less, a Shore C hardness of less than 80, and a specific gravity of 1.11 or greater; and the outer core layer having a Shore D hardness of from 55 to 80 and a specific gravity less than or equal to the specific gravity of the inner core layer; and
a cover layer having a Shore D hardness of from 55 to 80;
wherein the hardness of the inner core layer is less than the hardness of the outer core layer.