An object of the present invention is to provide a golf ball showing both striking a good balance between the visibility and the weather resistance. The present invention provides a golf ball comprising a golf ball body and two or more paint film layers formed on a surface of the golf ball body, wherein the paint film layers comprises a first paint film layer containing an inorganic fluorescent agent but substantially not containing an ultraviolet absorber, and a second paint film layer containing an ultraviolet absorber but substantially not containing an inorganic fluorescent agent; and the second paint film layer is disposed inside the first paint film layer.
1. A golf ball comprising a golf ball body and two or more paint film layers formed on a surface of the golf ball body, wherein the paint film layers comprises a first paint film layer containing an inorganic fluorescent agent but substantially not containing an ultraviolet absorber, and a second paint film layer containing an ultraviolet absorber but substantially not containing an inorganic fluorescent agent; and the second paint film layer is disposed inside the first paint film layer.
2. The golf ball according to claim 1 , wherein the first paint film layer is an outermost paint film layer.
3. The golf ball according to claim 1 , wherein the inorganic fluorescent agent is at least one selected from the group consisting of BaMgAl 10 O 17 :Eu, (SrCaBaMg) 5 (PO 4 ) 3 Cl:Eu, Zn 2 SiO 4 :Mn, BaMg 2 Al 16 O 27 :Eu, BaMg 2 Al 16 O 27 :Eu/Mn, LaPO 4 :Ce/Tb, Y 3 Al 5 O 12 :Ce, Y 2 O 2 S:Eu, Ca 10 (PO 4 ) 6 FCl:Sb/Mn, and Y 2 O 3 :Eu.
4. The golf ball according to claim 1 , wherein a content of the inorganic fluorescent agent in the first paint film layer ranges from 1 part by mass to 25 parts by mass with respect to 100 parts by mass of a base resin constituting the first paint film layer.
5. The golf ball according to claim 1 , wherein a content of the ultraviolet absorber in the second paint film layer ranges from 0.2 part by mass to 3.5 parts by mass with respect to 100 parts by mass of a base resin constituting the second paint film layer.
6. The golf ball according to claim 1 , wherein a base resin constituting the first paint film layer and the second paint film layer includes a polyurethane obtained by a reaction between a polyol component and a polyisocyanate component.
7. The golf ball according to claim 1 , wherein the inorganic fluorescent agent has a volume average particle diameter ranging from 3 μm to 10 μm.
8. The golf ball according to claim 1 , wherein a content of the inorganic fluorescent agent in the first paint film layer ranges from 3 parts by mass to 23 parts by mass with respect to 100 parts by mass of a base resin constituting the first paint film layer.
9. The golf ball according to claim 1 , wherein a content of the ultraviolet absorber in the second paint film layer ranges from 0.5 part by mass to 1.0 part by mass with respect to 100 parts by mass of a base resin constituting the second paint film layer.
10. The golf ball according to claim 1 , wherein the ultraviolet absorber is at least one selected from the group consisting of a salicylic acid derivate, a benzophenone derivate, a benzotriazole derivate, a cyanoacrylate derivate, a triazine derivate, and a nickel complex.
11. The golf ball according to claim 6 , wherein a content of an isocyanate group (NCO %) in the polyisocyanate component ranges from 0.5 mass % to 45 mass %.
12. The golf ball according to claim 6 , wherein the polyol component has a hydroxyl value ranging from 55 mg KOH/g to 100 mg KOH/g.
13. The golf ball according to claim 6 , wherein a molar ratio (NCO group/OH group) of an isocyanate group (NCO group) of the polyisocyanate component to a hydroxyl group (OH group) of the polyol component is 1.0 or more.
14. The golf ball according to claim 1 , wherein the first paint film layer has a thickness ranging from 5 μm to 15 μm.
15. The golf ball according to claim 1 , wherein the second paint film layer has a thickness ranging from 5 μm to 15 μm.
16. The golf ball according to claim 1 , wherein the paint film layers have a total thickness ranging from 10 μm to 25 μm.
17. The golf ball according to claim 1 , wherein the golf ball body comprises a core and at least one cover layer covering the core, and an outermost cover layer contains a fluorescent dye and/or a fluorescent pigment.
18. The golf ball according to claim 17 , wherein the fluorescent dye and/or the fluorescent pigment contained in the outermost cover layer develops a similar color as the inorganic fluorescent agent contained in the first paint film layer.
19. The golf ball according to claim 17 , wherein a content of the fluorescent dye and/or the fluorescent pigment in the outermost cover layer ranges from 0.5 part by mass to 3.5 parts by mass with respect to 100 parts by mass of a resin component constituting the outermost cover layer.