Patent ID: 9291151
Filing Date: 2016-03-22
CPC Classification: B29C,B29D,B29L,F03D,F05B,F05C,Y02E,Y02P,Y10T

Claim Text:
1. A wind turbine blade of hybrid material composition, wherein the blade comprises a structural box and a shell each molded as independent parts and then bonded together to form the blade, the shell comprising an upper shell part and a lower shell part having inner layers respectively between which the structural box is adhesively bonded to form the blade, the shell is manufactured by resin infusion technique using polyester or vinylester, wherein the structural box includes inner and outer cover layers and between the cover layers, upper and lower cap layers and a sandwich core material serving as sidewalls between the upper and lower cap layers, the inner and outer cover layers are epoxy and multidirectional fiber prepreg, and the structural box is, by weight, made up of more than 75% materials selected from epoxy carbon fiber unidirectional prepreg, epoxy fiberglass unidirectional prepreg, and epoxy basalt fiber unidirectional prepreg, the box and the shell are bonded using an adhesive that is methyl methacrylate or polyurethane.