Reinforced-plastic pultrusion fiber

Since pultrusion is an automatic and continuous process for fabricating fiber reinforced plastics, a proper pulling velocity will optimize production rate and mechanical properties. 

A prototype carbon fiber reinforced plastic (CFRP) body structure for high-speed trains using panels molded by pultrusion method (Suzuki and Sato 1993). (a) Outside of CFRP body structure (b) Inside of CFRP body structure... 

Pultrusion Forming method in which a bundle of fibers of glass or other suitable support material in a mobile plastic matrix is drawn through a die to form an fiber-reinforced polymer composite structure the shape of which is determined hy the die profile. 

Extrusion. The process of extrusion is closely related to pultrusion. In extrusion, the plastic material is pushed through a die under pressure rather than drawn through with continuous fiber-reinforcement materials. Random-oriented fiber-reinforcement materials can be used in the extrusion process if they are blended with the molten plastic before entering the die. Extrusion can be used only to produce structures that have a constant cross-sectional profile along their entire length, as determined by the die profile. Quite complex cross-sectional designs can be produced in this way, but they are essentially only two-dimensional. 

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