Characterization of Prepreg Materials for Wind Turbine ... - Hexcel.com

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Co-infusion: Case Study after Demoulding The finished 4x2m laminate Low porosity, high Tg FV (%) 50 Porosity (%) Tg (°C) Side 0,7 Middle 1,5 Top 75 Middle 120 Bottom 75 Cure cycle 6hrs 90°C Co-infusion simplifies the production process, combining the strengths of prepreg and infusion materials 23 ©2013 Hexcel
Conclusions ‣ Prepregs are used for both structural and surface applications in wind blade construction ‣ The surface of XF2P laminates have been characterised for surface defects • Defects can be reduced by >99% to give a paint ready surface ‣ M79, a new matrix for wind blades, has been characterised after cure at 70° and 80°C • Cure reaction enthalpies are 100-120 j/g, reducing from 350 j/g over the last 15 years • Static mechanical properties compare favourably with standard materials ‣ The low cure temperature of M79 helps enable co-infusion of prepreg with dry reinforcements, thus combining the best features of each process 24 ©2013 Hexcel
Page 1 and 2: Characterization of Prepreg Materia
Page 3 and 4: Company Profile ‣ Technology lead
Page 5 and 6: Typical Prepreg Systems in Wind Ene
Page 7 and 8: Features of Typical Wind Turbine Bl
Page 9 and 10: Characterisation of a Shell Prepreg
Page 11 and 12: Conventional Shell Construction, wi
Page 13 and 14: XF2P: Surface Characterisation Lami
Page 15 and 16: XF2P: Cross-sectional Analysis Stan
Page 17 and 18: M79 New generation prepreg system f
Page 19 and 20: Reduction in Prepreg Exotherm, 1995
Page 21 and 22: M79: Example of Mechanical Test Dat
Page 23: Wind Blades: M79 co-cured in an Inf

Characterization of Prepreg Materials for Wind Turbine ... - Hexcel.com

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