Multi-material golf club head
A multi-material golf club head having an improved performance is disclosed. More specifically, the present invention relates to a multi-material golf club head having a metallic frontal portion and a lightweight aft portion with an addition of an internal ribbon support member. The lightweight aft portion could be formed of a multi-layered sandwich material with at least one layer having low damping properties. The present invention may also further be comprised of a weighting mechanism that is accessible via an opening in the lightweight after portion but connects directly to the metallic frontal portion to mitigate any of the structural integrity issues associated with installing weights in a lightweight portion of a golf club head.
1 . A golf club head comprising:
a frontal striking face portion located at a frontal portion of said golf club head; and
an aft body portion, attached to the rear of said striking face portion;
wherein the aft body portion further comprises a lightweight shell,
wherein said lightweight shell further comprises a lightweight crown sub-shell, and
wherein said lightweight crown sub-shell further comprises:
an outer layer,
a central layer, and
an internal layer,
wherein said outer layer and said central layer are made from different materials,
wherein said internal layer and said central layer are made from different materials,
wherein said central layer further comprises two or more layers of a semi-crystalline resin material, and
wherein both said outer layer and said internal layer are formed from a polyetherimide (PEI) film having a thickness of less than about 0.10 mm.
2 . The golf club head of claim 1 , wherein said central layer further comprises between about 5 layers and about 13 layers of said semi-crystalline resin material.
3 . The golf club head of claim 2 , wherein said central layer further comprises between about 7 layers and about 11 layers of said semi-crystalline resin material.
4 . The golf club head of claim 1 , wherein said central layer is formed from a polyphenylene sulfide (PPS) material.
5 . The golf club head of claim 1 , wherein said PEI film has a thickness of less than about 0.08 mm.
6 . The golf club head of claim 5 , wherein said PEI film has a thickness of less than about 0.06 mm.
7 . A golf club head comprising:
a frontal striking face portion located at a frontal portion of said golf club head; and
an aft body portion, attached to the rear of said striking face portion;
wherein the aft body portion further comprises a lightweight shell,
wherein said lightweight shell further comprises a lightweight crown sub-shell, and
wherein said lightweight crown sub-shell further comprises:
an outer layer made from a polyetherimide (PEI) film,
a central layer made from polyphenylene sulfide (PPS) resin material, and
an internal layer made from a polyetherimide (PEI) film,
wherein said PPS resin material contains reinforcing fiber and has a Fiber Areal Weight (FAW) of about 80 grams/m 2 ,
wherein said PPS resin material has about 40% resin content, and
wherein said PPS resin material has an individual layer thickness of about 0.10 mm.
8 . The golf club head of claim 7 , wherein said central layer further comprises between about 5 layers and about 13 layers of said PPS resin material for a total thickness of between about 0.50 mm and 1.30 mm.
9 . The golf club head of claim 8 , wherein said central layer further comprises between about 7 layers and about 11 layers of said PPS resin material for a total thickness of between about 0.70 mm and 1.10 mm.