LFTs | COMPOSITES


they are produced as a continuous fibre via a proprietary solvent-based wet spinning process, are highly suitable for use in LFT production. The company says its tests have shown a cellu-


lose-reinforced PP LFT resin with the same flexural modulus as glass-reinforced PP LFT has a density around 5% lower — 1.06 g/cm3 reinforced LFT against 1.12 g/cm3


for a 40% cellulose for equivalent


glass LFT (Figure 1). The cellulose reinforced product is also said to show better Charpy impact strength, tensile strength, and flexural strength (Figure 2).


Tailgate solutions LFTs have been used in a number of automotive tailgate applications but the all-thermoplastic design developed for Volkswagen’s latest Multivan is the largest to date, according to Borealis. The company developed the part for the car maker together with Tier One supplier Magna around its Fibremod PP LFT technology. The tailgate consists of a number of compo-


nents. The outer frame and the inner part are both injection moulded in Borealis’s Fibremod GB416LF and are then glued together. Painted exterior parts are glued to the tailgate structure as well. The


Figure 1 : Comparison of density and flexural modulus of cellulose- reinforced PP-LFT resin and an equivalent glass reinforced grade


Figure 2: Comparison of key properties of a 30% short glass fibre reinforced PP and a 40% cellulose fibre reinforced PP-LFT


johan@highdream.net


SOURCE: POLYPLASTICS


SOURCE: POLYPLASTICS


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