Patent ID: 8961331
Filing Date: 2015-02-24
Classification: A63B

Abstract:
1. A golf club shaft formed as a laminate comprising fiber-reinforced resin layers, wherein the golf club shaft has a plurality of full length fiber-reinforced resin layers that extend the entire axial length of the shaft; the full length layers include full length bias layers and full length straight layers; if a layer having a matrix resin including a novolac type epoxy resin is defined as a novolac-containing layer, the full length straight layers located radially outside the full length bias layers include a novolac-containing layer; the matrix resin includes an epoxy resin component in the novolac-containing layer; the novolac type epoxy resin is contained in the epoxy resin component is in an amount of 3% by mass or greater and 19% by mass or less; if an average specific gravity of the novolac-containing layer is defined as S the novolac type epoxy resin is a phenol novolac type epoxy resin or an o-cresol novolac type epoxy resin.