27 April 2012
27 April 2012
Scott Bader has received a JEC Europe 2012 Partnership award for its Crestapol 1250LV Resin and Technical Support to Innovation Award Winners Axon Automotive.
Axon was presented with the Innovation Award for its new carbon fibre composite system. According to Scott Bader, this new automotive car frame uses internationally patented Axontex technology to manufacture very light weight composite structural beams with high strength and stiffness. During the JEC Europe 2012 Composites Show, Axon Automotive exhibited their completed city car, which is a “B” size car with dimensions very close to a Citroen C1, but with a frame weighing only 50kg.
Scott Bader explains that the Axontex technology used to make the light weight structural beams of the car frame has a 3D woven structure, comprising of a carbon fibre braid over machine laid multiple performs made of closed cell low density polyethylene (LDPE) foam. The carbon fibres and LDPE are then infused by VARTM with Scott Bader’s Crestapol 1250 LV urethane acrylate based resin; during moulding, the LPDE foam expands and takes the shape of the tool. They say the moulded Axontex carbon fibre composite beam has a unique internal structure with shear webs which, combined with the mechanical properties of Crestapol 1250LV resin, provides the very high stiffness and strength of this composite system. Ultimate tensile strength (UTS) of 900-1000 MPa (to BS 2282 Part 4) combined with a heat deflection temperature (HDT) of over 130 deg C has been consistently achieved from test pieces. A specific automotive related test isthe seat belt load test according to ECE regulation 14, which the Axontex system passes, resisting up to 1350 daN +/- 20 daN per attachment.
Scott Bader describes Axon Automotive’s carbon fibre composite system as highly versatile for design engineers. They say it can be tailored to produce a wide variety of straight and curved structural and load bearing parts and provides light weight parts with exceptional strength and torsional stiffness, plus a high resistance to deformation and bucking. The Axontex system has been designed to be ideally suited for a vehicle frame, which needs both rigidity and high impact crash resistance performance. Another significant structural test this system has undergone is the specific energy absorption (SEA) test; SEA is a measure of the ability of a material to absorb energy from a cash impact loading. The Axontex composite system can provide up to 1.5 times the SEA of aircraft grade aluminium.
Crestapol 1250LV is an ambient curing urethane acrylate based thermosetting resin which is compatible with carbon fibres that has beendeveloped by Scott Bader specifically for producing high performance carbon fibre reinforced (CFRP) and glass fibre (GRP) parts by vacuum infusion, resin transfer moulding (RTM) or any closed mould process. Scott Bader say that Crestapol 1250LV provides a cost effective alternative to epoxy infusion resin systems. It can be processed at room temperatures, needing only short periods of moderate post curing to achieve good mechanical and high temperature performance. They explain that Crestapol 1250LV resin offers all the ease of use of a typical unsaturated polyester resin, but with mechanical performance when carbon fibre reinforced similar to or exceeding an equivalent carbon fibre epoxy resin laminate. Scott Bader claim they have proven Crestapol 1250LV, under controlledtest conditions, to retain a very high percentage of its mechanical properties even after prolonged exposure to salt water and severe hot - cold thermal cycling. Scott Bader will be presenting a technical paper on Crestapol 1250LV resins with carbon fibres at SAMPE USA 2012 in Baltimore, which runs from May 21- 24th.
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