Kevlar fibre reinforced plastics

GFRP - Glass Fibre Reinforced Plastic KFRP - Kevlar Fibre Reinforced Plastic CFRP - Carbon Fibre Reinforced Plastic... 

GFRP - Glass fibre reinforced plastic KFRP - Kevlar fibre reinforced plastic CRFP - Carbon fibre reinforced plastic... 

Boeing Vertol s new Model 360 fuselage shell uses composite materials such as a sandwich of Kevlar diagonal weave skins with a Nomex honeycomb core and carbon fibre reinforced plastics for reinforcing edges and window cut-outs. The panels are bonded and the bonds are stressed to carry the full fuselage loads. Metallic fasteners are also used to facilitate assembly and jigging. 

Properties and uses of Kevlar-49 aramid fibre and of reinforced plastics of Kevlar 49 , DuPont Trade Literature Bulletin K-1, June 1974. 

Primitive reinforced plastics products were known in the 1920s and 1930s, but the more advanced fibre reinforced materials we know today only became significant commercially as structural materials in the 1950s, and even then, the more recent reinforcing fibres such as carbon/graphite, aramid (e.g. Kevlar , Twaron ) and polyethylene (e.g. Dyneema ) fibres were all still completely unknown. The great majority of reinforced plastics articles we use today have been manufactured since 1975. 

Research has been reported on Kevlar para-aramid fibres, which possess three times the tracking resistance of glass reinforced plastic flame retardant compounds [49]. 

To date, only one class of polymer has been found in which this problem can be overcome and highly successful reinforcement fibres produced. These are the aramld polymers, so-called because they contain both aromatic and amide groups in the molecular chain. Indeed, it is this combination which is the key to their success. Kevlar 49 is currently the most widely used aramid fibre for reinforcement of plastics, and it illustrates the point well. It consists of the polymer poly(paraphenylene terephthalamide) ... 

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