Huntsman’s epoxy resin for CFRP passenger cell

An epoxy resin system from Huntsman Advanced Materials has been specified by the BMW Group to manufacture structural composite parts on the new BMWi3 in volume production. The materials are being used to produce the side frame as well other composite parts which are then assembled to form the BMWi3’s ‘life module’, also called the ‘passenger cell’.

The use of carbon fiber-reinforced plastic (CFRP) for the passenger cell allows production time to be cut by half compared to those required for an equivalent car built along conventional lines. Structural body components are being manufactured using high pressure RTM (HP-RTM), a processing method now recognised as a key technology for large-scale production. The process involves making 3D dry carbon stack preforms using Araldite LT 3366 as a binder powdered on the surface of the reinforcements. This helps to maintain correct fibre alignment and geometry during automated manipulation and positioning of the dry preform into the mold. Huntsman’s epoxy RTM system Araldite LY 3585 / Hardener XB 3458 is then injected at high pressure into the mold. The system’s low viscosity plays an important role in the entire process, from the dosing and mixing right through to impregnation and good fibre wet-out in the mould. Araldite LY 3585 / Hardener XB 3458 is fast reacting and can cure in just five minutes at 100°C.

Offering good thermomechanical performance, including a high elongation at break, the properties of this Araldite RTM system are particularly beneficial for automotive structural parts and requirements to meet crash test criterion.


4 years ago

Light and stiff

KraussMaffei’s high pressure-resin transfer moulding (HP-RTM) process enables series production of carbon fibre reinforced plastics (CFRP) in automobile manufacturing.

4 years ago