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Henkel Launches New Composite Peel Ply for Long Term Durability

  • Thursday, 15th November 2007
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The aerospace group of Henkel Corporation has introduced and qualified a new resin-impregnated peel ply, Hysol EA 9895 WPP, eliminating the need for secondary composite surface preparation, such as sanding or bead blasting.

Henkel says that Hysol EA 9895 WPP features easy removal on large composite parts and delivers an optimum bond surface.

Henkel’s aerospace research and development group discovered that current dry peel plies leave contaminant fibres on the composite surfaces. These contaminants become potential sites for weaknesses in bond line durability. This background information was the subject of a 2005 SAMPE paper published by Henkel entitled Key Factors in the Peel Ply Preparation Process.

Hysol EA 9895 WPP also was the subject of an independent 2007 SAMPE paper published by authors from Boeing and the University of Washington. The paper, titled Influence of Peel Ply on Adhesive Bonding of Composites, evaluated an array of composite substrates with commercial structural bonding films. Hysol EA 9895 WPP demonstrated good bond line durability and excellent cohesive failure modes regardless of the adhesive and prepreg combination.

“This information is important to the aerospace industry as composites move into primary structures,” said Michael Cichon, Director of Marketing, Henkel. “With this emerging information, composite users have access to the best tools available.”


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