degrees the difference in the winding phase is dependent on the required strength and rigidity of the overall composite material the polymeric composite is preferably an epoxy blend however the polymeric composite may also consist of polyurethanes or phenolics for example in one aspect the polymeric composite is a blend of two or more epoxy resins preferably the composite is a blend of a first epoxy resin of bisphenol a and epichlorohydrin and a second cycoaliphatic epoxy resin preferably the cycloaphatic epoxy resin is araldite u00ae liquid epoxy resin commercially available from ciga geigy corporation of brewster n y a 50 50 blend by weight of the two resins has been found to provide the required stability and strength for use in high temperature and pressure applications the 50 50 epoxy blend also provides good resistance in both high and low ph environments the fiber is typically wet wound however a prepreg roving can also be used to form a matrix a post cure process is preferable to achieve greater strength of the material typically the post cure process is a two stage cure consisting of a gel period and a cross linking period using an anhydride hardener as is commonly know in the art heat is added during.