table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:22.00pt "Arial", sans-serif; } .font1 { font:8.00pt "Lucida Sans Unicode", sans-serif; } .font2 { font:37.00pt "Lucida Sans Unicode", sans-serif; } .font3 { font:12.00pt "Trebuchet MS", sans-serif; } EC-HLM Honeycomb liquidmolding Dipl.lng., Dipl.Chem. Oliver Bottier Dipl. Ing. Benjamin Janz Dr. rer. nat., Dipl. Chem. Jurgen Walter xmKJIKJ COMPOSIIl-S

table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:30.00pt "Franklin Gothic Medium", sans-serif; } Process description Areas of applications Mechanical properties compared to prepreg technology Which possibilities can we offer? The advantages for our customer Conclusion AXWHJKOCOMPOSIIl-S

table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:18.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:30.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:40.00pt "Franklin Gothic Medium", sans-serif; } Honeycomb liquid molding: An overview It is a resin infusion process combinթe! with a honeycomb core. A honeycomb sandwich structure can be procluced with resin infused adjacent fabrics without filling the cells by infusion. Օ The honeycomb is water tight sealed and remains stable in...

table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:18.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:21.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:26.00pt "Franklin Gothic Medium", sans-serif; } .font4 { font:30.00pt "Franklin Gothic Medium", sans-serif; } .font5 { font:40.00pt "Franklin Gothic Medium", sans-serif; } Honeycomb liquid moulding: The sketch Lay-up: A barrier layer and dry fabric are laid up in an integrated process Dry fabric/ fiber pack Barrier Core material Honeycomb...

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:21.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:30.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:40.00pt "Franklin Gothic Medium", sans-serif; } EC-HLM process: The part Integrated Infusion process: a) pre-curing of the barrier-core-bonding b) resin infusion & final cure Resin only in the

table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:8.00pt "Arial", sans-serif; } .font1 { font:10.00pt "Arial", sans-serif; } .font2 { font:23.00pt "Arial", sans-serif; } EC-HLM: Sample Leading-Edge Radome Floor-Panels Landing gear door HTP- Fairing Belly-Fairing Bathtub Panels Flap-Track Fairings InnerOuter Barrel 7/20 © 2008 EURO-COMPOSITES

table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:8.00pt "Arial", sans-serif; } .font1 { font:15.00pt "Arial", sans-serif; } .font2 { font:23.00pt "Arial", sans-serif; } EC-HLM: Sample Structural part: KEVLAR® honeycomb 3.2-40 with Carbon fabric G926 (6 layers on each side) infused with RTM6 (structural epoxy resin) 8/20 © 2008 EURO-COMPOSITES

table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:8.00pt "Arial", sans-serif; } .font1 { font:15.00pt "Arial", sans-serif; } .font2 { font:23.00pt "Arial", sans-serif; } EC-HLM: Sample New Development: Resin Infusion with honeycomb for aircraft interior parts Current results: New resin EC-RI-FST without any flame retardant fillers, cold & hot curable Օ FAR 25853: flammability and smoke density within the specification Flat wise tensile: core failure Օ Tg: adjustable between 120 - 200° C Very good resin flow behavior ^ Օ Viscosity adjustable within the range of...

table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:14.00pt "Lucida Sans Unicode", sans-serif; } .font1 { font:13.00pt "Trebuchet MS", sans-serif; } © 'Xm t-URO COMPOSIIFS

table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:16.00pt "Arial", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:18.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:30.00pt "Franklin Gothic Medium", sans-serif; } .font4 { font:40.00pt "Franklin Gothic Medium", sans-serif; } EC-HLM: Mechanical properties Laboratory Testing Mechanical and adhesive properties o 3- & 4- point bending o Flat-wise tensile (20° &80° C) Օ Non Destructive Testing Watertightness Օ Further testing 11/20 © -xm hjro composas

table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:19.00pt "Arial", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:21.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:30.00pt "Franklin Gothic Medium", sans-serif; } .font4 { font:40.00pt "Franklin Gothic Medium", sans-serif; } EC-HLM: Mechanical properties Mechanical Testing Test samples have been eut from two panels sized 1000 x 1200 mm Resin: RTM6 [Hexcel structural epoxy resin, qualified for aerospace applications) Fabric: Carbon G926 6 Loyers on each side (0°...