Golf club iron comprising shear thinning filler material
A golf club head with a cavity at least partially filled with a non-Newtonian shear thinning filler material is disclosed herein. The filler material may comprise multiple materials, such as microbubbles or microbeads, composite polyol materials, blowing agents, and/or graphene to improve performance and dampen sound after the golf club head impacts a golf ball.
1 . A golf club head comprising:
a body comprising a striking face, a sole portion, a top portion, a rear portion, and a cavity; and
a non-Newtonian shear thinning filler material,
wherein the cavity is at least partially filled with the filler material;
wherein the filler material comprises urethane with air pockets created by the reaction of isocyanate with water to create CO 2 .
2 . A golf club head comprising:
a body comprising a striking face, a sole portion, a top portion, a rear portion, and a cavity; and
a non-Newtonian shear thinning filler material,
wherein the cavity is at least partially filled with the filler material;
wherein the filler material is memory foam.