Prepreg Blade Technology

Prepreg technology is used in applications where weight, performance and consistency of quality are prerequisites. Wind energy prepregs are characterized by their high areal weights, large volumes, high deposition rates, and fibre orientation:

• Glass/epoxy multiaxials (300-200gsm)
• Glass/epoxy unidirectional (150-1600gsm)
• Carbon/epoxy unidirectional (300-800gsm)

               
Choosing prepreg for wind turbine blade manufacture, effectively reduces the complexity of the component manufacture by allowing Gurit to take care of the mix ratio, mix quality, resin content, fibre alignment and impregnation quality.  Allowing Gurit to handle and optimise these aspects through its extensive experience in supplying prepreg to the wind energy Industry, enables blade manufacturers to focus solely on the blade production process.
            
          
WE91 PREPREG FAMILY

> Reduced cycle times - lower peak exotherm in thick sections > Diuron-free - improved health & safety > Versatile - long out-life at room temperature and available with a range of reinforcements > Recommended cure between 85ºC and 120ºC - excellent laminate quality, low bleed

                      
AN INTRODUCTION TO THE WE91 PREPREG FAMILY

The WE91 series is part of the WE and WT range of prepreg and SPRINT® products. This unique product range provides technically and commercially competitive engineering materials, ideal for use either solely, or in conjunction with other Gurit products from within the range.

The WE91 series is a high flow, Diuron free epoxy prepreg ideally suited to the manufacture of thick sections. It can be cured at temperatures as low as 85°C, but can also be used for the rapid manufacture of components through its 45-minute cure at 120°C. All of this can be achieved together with an out-life of 60 days at 21°C.

The WE91 series is designed for vacuum bag processing and offers excellent mechanical performance on glass and carbon fibre reinforcements. WE91 is pre-impregnated into E-glass fibre which can be supplied in three different formats, unidirectional, biaxial and triaxial, all of which are manufactured in large volumes in order to make it a cost-effective composite building block for a range of applications. Other WE91 products include pre-impregnated peel ply, and needlemat.

• WE91-1 Higher Tack Glass Prepreg (v7)
  The WE91 series is part of the WE and WT range of prepreg, and SPRINT® products. There are two tack variants of the WE91 resin matrix; WE91-1 and WE91-2. This datasheet details WE91-1, the higher tack variant.
• WE91-2 - Prepreg (v3)
  The WE91 series is part of the WE and WT range of prepreg, and SPRINT® products. This unique product range is ideal for use either solely, or in conjunction with other Gurit products from within the range.