CompositesWorld
Issue link: https://cw.epubxp.com/i/517026
CompositesWorld.com 55 » INFUSION PROCESSING TECHNOLOGY Silicone sheeting for reusable vacuum bags Composites molding supplies distributor Rudolph Bros. & Co. (Canal Winchester, OH, US) says vacuum bags made with Fenner Precision's (Mannheim, PA, US) trademarked FenForm silicone sheeting are reusable and, therefore, provide a cost-efective and environmentally friendly alternative to disposable plastic bags used in both the VARTM (vacuum- assisted resin transfer molding) and SCRIMP (Seemann Composites Resin Infusion Molding) processes. Advantages of the material include the following: Greater UV, ozone, fame, chemical and tear resistance than disposable plastic materials; durability over a wide temperature range (-40°C to 200°C); translucence (resin fow front can be observed), does not crease like nylon, and is competitively priced. The sheeting comes standard in 1 mm-3 mm thickness, in widths to 1,450 mm. It's available in both uncured and cured forms (cured material has a fne fabric impression to aid removal) in standard translucent or gray. www.rudolphbros.com » FIBER-REINFORCED THERMOPLASTICS Pre-consolidated organosheet SGL Group (Wiesbaden, Germany) is expanding on its SIGRAFIL C T50-4.0/240-T140 carbon fber product line, optimized for thermoplas- tics, with the addition of organic (thermoplastic) sheets reinforced with carbon and glass fbers. SGL notes that components made from the organic sheets can be shaped into almost any fnal-product geometry, and can be repaired and recycled. Two standard sizes are available, but SGL Group also ofers individualized laminate structures, which can be customer-specifed in terms of fber orientation, textile architectures and wall thickness. www.sglgroup.com » MATERIALS TESTING TECHNOLOGY Characterization of functionalized graphene materials Haydale Ltd. (Ammanford, UK) reports that it has developed a rapid, in-house characterization test method to confrm functionalization of graphene materials. Haydale notes that most particles, including surface-functionalized carbon nanopar- ticles, dispersed in an aqueous system, acquire a surface charge, principally either by ionization of surface groups, or adsorption of charged species. These surface charges modify the distribution of the surrounding ions, resulting in a layer around the particle that difers from the bulk solution. Haydale's new dispersion stability method provides what is said to be a rapid, simple and repeat- able test that confrms the efectiveness of its HDPlas graphene functionalization process. Further, the method is able to indicate the level of functional groups added and to discriminate between diferent functional groups. Complementary to traditional chemical characterization methods currently used by the graphene industry, Haydale says its new dispersion stability tester provides an afordable and reliable quality-control tool for functionalized graphene process development and manufacturing. www.haydale.com For technical information and sample call 800.992.2424 miller-stephenson chemical company, inc. Connecticut - Illinois - California - Canada 800.992.2424 203.743.4447 supportCW@mschem.com miller-stephenson.com/quik-freeze m s TM N E W ! Low Global Warming Formulation Available Perfect for controlling resin viscosity in composite forming by cooling lay-up dur- ing cure cycle. Also, effectively used for reducing tack on pre-preg during lay-up if required. We also offer a complete line of EPON Epoxy Resins/Curing Agents and PTFE Release Agents for composite molding and fabrication. Composite Chillers Composite Chillers NEW PRODUCTS