Patent ID: 7261647

Claim:
A golf ball comprising: a core; a cover having a first water vapor transmission rate; and a vapor barrier layer disposed between the core and the cover, the barrier layer being formed from a polymer comprising a nano-material having an average particle size of 100 nm or less; wherein the nano-material creates a tortuous path across the barrier layer such that the barrier layer has a second water vapor transmission rate less than the first and the nano-material is selected from the group consisting of smectite minerals; carbon nanotubes; fullerenes; single-wall and multi-wall carbon nanotubes; polymer nanofibers; carbon nanofibrils; nitrides; carbides; sulfides; ormocers; glass ionomers; resin-modified glass ionomers; silicon ionomers; polymerizable cements; metal-oxide polymer composites; lipid-based nanotubules, polyhedral oligomeric silsequioxanes and platelet materials.