what is dry carbon fibre? I here a lot of advertising about it but do not know how it is made?

Answer 1

Carbon fiber reinforced plastic or (CFRP or CRP), is a strong, light and very expensive composite material or fiber reinforced plastic. Similar to glass-reinforced plastic, which is sometimes simply called fiberglass, the composite material is commonly referred to by the name of its reinforcing fibers (carbon fiber), an example of part-for-whole metonymy. The plastic is most often epoxy, but other plastics, such as polyester, vinylester or nylon, are also sometimes used. Some composites contain both carbon fiber and fiberglass reinforcement. Less commonly, the term graphite-reinforced plastic is also used.

It has many applications in aerospace and automotive fields, as well as in sailboats, and notably in modern bicycles, where these qualities are of importance. It is becoming increasingly common in small consumer goods as well, such as laptop computers, tripods, fishing rods, racquet sports frames, stringed instrument bodies, classical guitar strings, and drum shells.

The choice of matrix can have a profound effect on the properties of the finished composite. One common plastic for this application is graphite epoxy, and materials produced with this methodology are generically referred to as composites. The material is produced by layering sheets of carbon fiber cloth into a mold in the shape of the final product. The alignment and weave of the cloth fibers is important for the strength of the resulting material. In professional applications, all air is evacuated from the mold, but in applications where cost is more important than structural rigidity, this step is skipped. The mold is then filled with epoxy and is heated or air cured. The resulting stiff panel will not corrode in water and is very strong, especially for its weight. If the mold contains air, small air bubbles will be present in the material, reducing strength. For hobby or custom applications the cloth can instead be draped over a mold, and the epoxy is "painted" over it, however because of the resulting lack of strength, this is usually only used for cosmetic details.

The large amount of (often manual) work required to manufacture composites has hitherto limited their use in applications where a high number of complicated parts is required.

The chemistry and manufacturing techniques for thermosetting plastics like epoxy are often poorly suited to mass-production. One potentially cost-saving and performance-enhancing measure involves replacing the epoxy matrix with a thermoplastic material such as nylon or polyketone. Boeing's entry in the Joint Strike Fighter competition included a Delta-shaped carbon fiber reinforced thermoplastic wing, but difficulties in fabrication of this part contributed to Lockheed Martin winning the competition.

Answer 2

yeah what he said