* unsaturated resin system products

Wind Turbine Blades

The glass fiber pultrusion wedge block (UD block for short) embedded in the blade root is a pultrusion profile specially developed for the fan blade root. Developed by our company and Dow Chemical, it is made of epoxy resin as the matrix material and glass fiber roving as the reinforcement material by pultrusion process. This product is applied to the blade root of wind power blade. The strength and stability of the blade are improved by embedding the blade root. This product has the characteristics of high tensile strength, high shear strength and the same system with the blade. The product can overcome the defects caused by manual laying and vacuum pouring of embedded bolts, such as the quality defects such as wrinkles and bubbles.

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Specification of Wind Turbine Blades

Performance	Direction	Unit	Test Standard	Test Result
Tensile strength	0° (X direction)	Mpa	ISO 527-5: 2009	≥600
Tensile modulus	0° (X direction)	Gpa	ISO 527-5: 2009	≥41.5
Compressive strength	0° (X direction)	Mpa	ISO 14126: 1999	≥600
Compressive modulus	0° (X direction)	Gpa	ISO 14126: 1999	≥41.5
Shear modulus	–	Gpa	ASTM D7078	≥4
Glass transition temperature	–	℃	ISO 11357-2: 1999	≥95
Gum content	–	%	ISO 1172: 1996	≥20
Tensile shear strength	–	Mpa	BS EN 1465-2009	≥25