▎ 摘　　要

NOVELTY - A golf ball (10) comprises an inner core (12a) comprising a polybutadiene material, an outer core (12b) comprising 0.1-5.0 wt.% polybutadiene and graphene materials, and a cover layer (16) arranged over the outer core. The outer core has a flexural modulus of 80-95 MPa. A dual core comprising the inner core and the outer core has a compression value of 40-55. USE - Golf ball. ADVANTAGE - The golf ball has excellent impact strength due to the presence of graphene core. The golf ball exhibits high mean time to fail upon repeated impact in a high speed testing device or with a golf club. The incorporation of graphene in the inner and outer cores enhances durability, compression and coefficient of restitution of the dual core. Due to high thermal conductivity of graphene, the overall thermal conductivity of the core is increased. DESCRIPTION OF DRAWING(S) - The drawing shows an exploded partial cut-away view of the golf ball. Golf ball (10) Inner core (12a) Outer core (12b) Inner mantle layer (14a) Outer mantle layer (14b) Cover layer (16)