110 – 160°C Curing Epoxy Matrix Product Data Sheet Description HexPly® M78.1 is a formulated, hot melt epoxy resin matrix, especially designed for prepreg applications where short cure cycles using temperatures ≥110°C are required. Due to its high reactivity, HexPly® M78.1 can be used for economic, environmentally friendly and fast manufacture of industrial composites. HexPly® M78.1 is based on a modified, toughened epoxy resin and a highly reactive curative package applicable for pre-impregnation into carbon, glass or aramide fibers, combining the outstanding feature of being curable within e.g, 7 minutes at 120°C and with a shelf-life of at least 2 weeks at ambient conditions. The versatility of HexPly® M78.1 allows a range of processing temperatures, recommended from 110°C up to 160°C. Following a cure cycle in the recommended range, HexPly® M78.1 demonstrates superior mechanical properties and high glass transition temperatures. The controlled-flow characteristics of HexPly® M78.1 offers excellent adhesion to auxiliary and core materials like aluminum, wood, thermoplastics and elastomers. The solvent-free, non-corrosive character of HexPly® M78.1 offsets the commonly known drawbacks of in-house prepreg systems that typically include hazardous components causing limitations regarding environmental, health and safety conditions. Benefits and Features ¥¥ Versatile, short cure cycles:110 – 160°C, 18-1.5 minutes respectively ¥¥ Optimum cure cycle 25 -120°C at 20 °C/minute, 7 minutes at120 °C ¥¥ Outstanding shelf life performance, ≥2 weeks at+23°C ¥¥ Excellent adhesion to core materials (wood, aluminum, thermoplastics, elastomers) by controlled flow technology ¥¥ Suitable for thin and thick laminates ¥¥ Well adapted to pressure moulding processes, suitable for a range of pressures (1 to 10 bar) ¥¥ Good flexibility, convenient handling and good adhesion to moulds by low tack ¥¥ Good surface finish ¥¥ Full REACH compliance ¥¥ Solvent-free, non-aggressive, no observable exposure limits Resin Matrix Properties Dynamic Thermal Properties by DSC (ISO 11357-5)

110-160°C Curing Epoxy Matrix ^ Product Data Sheet Isothermal Cure Properties by DSC Temperature Cure Time (95%)* Dynamic Viscosity Minimum Viscosity: 13.5 Pas @80°C (controlled flow technology) Copyright ©2016- Hexcel Corporation - All Rights Reserved.

110 – 160°C Curing Epoxy Matrix Product Data Sheet Prepreg-Types and Mechanical Properties after Curing Reinforcement Product Mechanical Properties Physical Properties Resin Resin Tensile Tensile Weight Content Flow Strength Modulus [g/m²] [%] [%] [MPa] [GPa] Mechanical data are based on a cure cycle of 130°C, 15 min, 5 bar. Curing Conditions ¥¥ Recommended heat-up rate: 5 - 25°C/min ¥¥ Recommended cure cycle: 25-120°C at 20°C/min, 7 minutes at 120°C ¥¥ Pressure range: 1-10 bars The optimum cure cycle, heat-up rate and dwell period is dependent on component size, layup construction, oven capacity...

110 – 160°C Curing Epoxy Matrix Product Data Sheet For more information Hexcel is a leading worldwide supplier of composite materials to aerospace and industrial markets. Our comprehensive range includes: ¥¥ HexTow® carbon fibers ® ¥¥ HexForce reinforcements ¥¥ HexPly® prepregs ¥¥ HexMC® molding compounds RTM resins ® ¥¥ Redux adhesives ¥¥ HexTOOL® tooling materials ¥¥ HexWeb® honeycombs honeycomb ¥¥ Engineered ¥¥ Engineered core products For US quotes, orders and product information call toll-free 1-800-688-7734. For other worldwide sales office telephone numbers and a full address list, please...