Orange County SAMPE Meeting Notice

Online Virtual Meeting Using ZOOM

Wed., Sept 16th, 2020 at 7 p.m.

Presentation by D. DeWayne Howell
Toray Advanced Composites
Topic -  THERMOPLASTIC PREPREG TECHNOLOGY AND APPLICATIONS
LM PAEK PREPREG FOR IMPROVED PROCESSING OF THERMOPLASTIC COMPOSITES

ABSTRACT: Thermoplastic composite processing has advanced significantly in the past several years. Beginning with stamp forming of consolidated laminates, which can now be considered commonplace, the next level of the state-of-the-art is in-situ fiber placement. LM PAEK prepregs have arrived on the scene with the advantage of up to 55°C (131°F) lower processing temperatures and significantly lower viscosity compared to PEEK prepregs, while delivering similar performance. This translates into faster cycle times, lower costs and improved in-situ processing.

LM PAEK prepreg material forms span the familiar architectures including fabrics, UD tape, slit UD tapes and fabrics, and chopped prepreg bulk molding compounds. TenCate's Cetex® TC1225 slit UD tape has been demonstrated to yield up to 200 mm/s automated fiber placement (AFP) deposition rates for near void free in-situ lamination with higher speeds anticipated in the near future. Much higher rates can also be run if the AFP process is followed by out of autoclave (OoA) consolidation to reduce porosity. The OoA consolidation step yields a laminate that is on par with automated tape laying + press consolidation.

Producing design allowables and the qualification of any new material system for aerospace use is always an intense and costly process. TenCate is enabling the introduction of LM PAEK prerpeg by having worked with NCAMP to produce a publicly available database for T700/TC1225 UD prepreg.

SPEAKER: D. DeWayne Howell - A graduate of the University of Cincinnati with a degree in Aerospace Engineering, DeWayne has 35 years of composite material and structural design & analysis experience. The past 7 years of his career have been with Toray Advanced Composites. He is currently a Senior Applications Engineer and Project Manager in the Expert Services Group, specializing in thermoplastic materials, part design and structural analysis. His work history includes NASA, Northrup Grumman, CompositeTek, and Fiberforge. He has developed, authored, marketed and sold CompositePro, a popular design and analysis software package for composite structures that is now sold worldwide under the name Autodesk Helius Composite.

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