Boron fiber reinforced plastice

Based on contents of an RP other terms are used to identify an RP. Examples include glass fiber reinforced plastic (GFRP), aramid fiber reinforced plastic (AFRP), carbon fiber reinforced plastic (CFRP), graphite fiber reinforced plastic (GFRP), boron fiber reinforced plastic (BFRP), etc. 

BFK Boron fiber reinforced plastic (German C Saran coated cellophane (ASTM)... 

Fiber-reinforced plastics have been widely accepted as materials for structural and nonstructural applications in recent years. The main reasons for interest in FRPs for structural applications are their high specific modulus and strength of the reinforcing fibers. Glass, carbon, Kevlar, and boron fibers are commonly used for reinforcement. However, these are very expensive and, therefore, their use is limited to aerospace applications. 

The moduli of elasticity of fiber-reinforced plastics can exceed those of metals. Thus, the modulus of an epoxide resin reinforced with 60% boron fiber is higher than that of steel, and that with 30% boron fiber is about the same as that of titanium, whereas that with 30% glass fiber is higher than that of aluminum (Figure 35-16). Since the densities of fiber-reinforced epoxides... 

Fiber-reinforced composite materials such as boron-epoxy and graphite-epoxy are usually treated as linear elastic materials because the essentially linear elastic fibers provide the majority of the strength and stiffness. Refinement of that approximation requires consideration of some form of plasticity, viscoelasticity, or both (viscoplasticity). Very little work has been done to implement those models or idealizations of composite material behavior in structural applications. 

By this time the industry required a more inclusive term to describe RPs, so composite was added. Thus the name in the plastics industry became Reinforced Plastic Composites. More recently they became known only as Composites. However composites identify many other combinations of basic materials (Table 6-18). The fiber reinforcements included higher modulus glasses, carbon, graphite, boron, aramid (strongest fiber in the world, five times as strong as steel on an equal-weight basis), whiskers, and others (Table 6-20 and Figs. 6-13 and 6-14). In... 

The second main ingredient in reinforced plastic is the reinforcement, eg, fibers of glass, carbon, boron, mineral, cellulose, or polymers. Reinforcements can be configured in many ways, such as continuous or chopped strands, milled fibers, rovings, tows, mats, braids, and woven fabrics. 

Fiber glass - [GLASS] (Vol 12) - [REINFORCED PLASTICS] (Vol 21) -borate m pORON COMPOUNDS - BORON OXIDES, BORIC ACID AND BORATES] (Vol 4) -borate m [BUILDING MATERIALS - SURVEY] (Vol 4) -for sound absorption [INSULATION, ACOUSTIC] (Vol 14) -use m ablative materials [ABLATIVE MATERIALS] (Vol 1) -use m conveying equipment [CONVEYING] (Vol 7) -use of oxygen for [OXYGEN] (Vol 17)... 

The increasing use of plastics with abrasive fillers and reinforcements created a demand for an even more abrasion resistant barrel than the standard iron/boron type. The use of glass fiber reinforced compounds for injection molding has been the single most important factor since a fabricator would be lucky if they could reach 6 months of continuous operation. This need has been successfully answered by the development of liner materials containing metallic carbides such as tungsten carbide and titanium carbide extending their life. 

Borchardt, J. K., Nanotechnology Providing New Composites, RP, Nov. 2003. Borchardt, J. K., Reinforced Plastics Help Preserve Historic Buildings, RP, Dec. 2003. Boron-Free Glass Fibers - the Trend for the Future, RP, June 2003. 

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