SE 85 EPOXY PREPREG SYSTEM ¬ Rubber toughened system – good resistance to microcracking High flow Good surface finishes possible INTRODUCTION The SE 85 series are toughened hot-melt, epoxy prepregs that offer an extremely good balance of mechanical properties. They are ideal for structural components where improved impact performance and resistance to resin microcracking is desired. SE 85 can be cured at 80°C (176°F), yet remains an outlife of up to 56 days at 23°C (73°F). With its ¾ hour cure at 120°C (248°F), it is also suitable for quick manufacture of parts, and is also used in the development of trial components. SE 85 has high flow characteristics, so that heavy reinforcements can be easily wet out, and good consolidation can be achieved in very thick (>25mm/1inch) laminates, under just vacuum bag pressures. Its flow behaviour also means that it can produce excellent surface finishes when used in pressure-moulded components. SE 85BL is a black pigmented variant, often used in carbon fabrics to provide an excellent deep black gloss finish on the outer surface of carbon components such as yacht spars and race car parts. SE 85 system can equally be used in sandwich structures with honeycomb and foam cores. In this application, depending on resin content, it can be used in a self-adhesive mode, although it is more commonly used in conjunction with the toughened SA 80 Adhesive Film (See separate datasheet).

PROCESSING NOTES - GENERAL PROCESSING NOTES - CURING CURE CYCLES When preparing the lay-up the prepreg should be removed from the freezer and allowed to thaw in a sealed bag. This may take 6 to 24 hours depending on roll size. This prevents atmospheric moisture from condensing on the prepreg which may cause voiding on cure. The mould surface should be release coated and must have been tested for vacuum integrity prior to lay-up. For a good balance of composite properties, it is recommended that the laminate is cured at 85°C (185°F) for a minimum of 10 hours. A laminate may be cured in two stages...

PRODUCT INFORMATION AVAILABILITY Small quantities of black pigmented version of SE 85 on RC 280T4 are usually held in stock but other SE 85 prepregs are available in a wide variety of fabric forms and collimated unidirectional tapes. Unidirectional materials are normally supplied on a single release paper and fabrics on a polythene film. Please contact Customer Support to discuss specific requirements and availability. Nominal Resin Content (by weight) Nominal Fibre Weight Nominal Areal Weight Nominal Roll Width Nominal Roll Length *allows repositioning of plies at recommended handling temperature...

LAMINATE PROPERTIES CURED RESIN PROPERTIES Oven cured using standard processing techniques and a minimum cure time of 12 hours at 80°C (176°F). PROPERTY TEST STANDARD Tensile Strength Tensile Modulus Compressive Strength Compressive Modulus WOVEN LAMINATE PROPERTIES Cured using standard processing techniques and a minimum cure time of 12 hours at 80°C (176°F) for Vacuum bag and 1 hour at 120ºC (248ºF) for press. PROPERTY Fabric / Fibre Description Woven 2x2 Twill HS Carbon Woven 2x2 Twill HS Carbon Woven 4x4 Twill HS Carbon Resin Content Cure Method Cure Schedule TEST STANDARD Glass Transition...

All advice, instruction or recommendation is given in good faith but the Company only warrants that advice in writing is given with reasonable skill and care. No further duty or responsibility is accepted by the Company. All advice is given subject to the terms and conditions of sale (the Conditions) which are available on request from the Company or may be viewed at the Company’s Website: www.gurit.com/terms-and-conditions.aspx. The Company strongly recommends that Customers make test panels and conduct appropriate testing of any goods or materials supplied by the Company to ensure that they...