Patent ID: 8721473
Filing Date: 2014-05-13
Classification: A63B

Abstract:
1. A golf ball comprising a core, a mid layer positioned outside the core, and a cover positioned outside the mid layer, wherein the cover has a thickness of 0.3 mm or greater and 1.6 mm or less, the cover has a Shore D hardness Hc of 56 or greater, the mid layer has a thickness of 0.5 mm or greater and 1.6 mm or less, the mid layer has a Shore D hardness Hm of 35or greater and 57or less, and the mid layer has a melt flow rate, measured under the conditions of: a temperature of 190° C. and a load of 2.16 kg, of 4 g/10 min or greater, and the mid layer includes a composition (M) that is formed from: the weight ratio A1/B1of the high melt viscosity resin (A) with respect to the low melt viscosity ionomer resin (B) is equal to or greater than 55/45 and equal to or less than 99 /1, and the amount of the metal ion source (C1) is equal to or greater than 0.1 part by weight and equal to or less than 10 parts by weight, per total 100 parts by weight of the high melt viscosity resin (A) and the low melt viscosity ionomer resin (B).