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Fibers
as laminates, with the continuous fibers at various angles to one another. In between chopped and continuous fibers are the recently introduced long-fiber-reinforced composites, which are available with either carbon or glass-fiber reinforcement. In these compounds (ICI Advanced Materials and Polymer
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Reinforced Plastics Make Metals Look Weak
. In addition, the strands remain flexible because they are not fully wet out prior to molding. Complete wet out of the fabric comes during the compression-molding process. Two types of continuous-fiber-reinforced materials have recently replaced metal in many aerospace, sporting good, and industrial
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Metal-Matrix Composites
monolithic metals, tend to be isotropic. The presence of brittle reinforcements and perhaps of metal oxides, however, tends to reduce their ductility and fracture toughness. Continuing development may reduce some of these deficiencies. The properties of materials reinforced with whiskers depend
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Tips for metal-to-plastic conversions
is derived by obtaining the quotient of stiffness (at 185°C) to specific gravity and normalizing the results using 40% Glass-fiber-reinforced Stanyl as the basis. Jim Conkey. Application Development Engineer. Eric Sattler. Application Development Engineer. DSM Engineering Plastics. Evansville, Ind
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More metal parts go to composites
, Wilmington, Del. This has prompted designers to look at alternative materials such as high-performance composites made from polyimides, epoxies, fluoropolymers, and phenolics reinforced with woven, braided, or chopped graphite, carbon, glass, and aramid fibers. Advancements in these raw material forms
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Melt Processable, Fiberglass Reinforced, High Heat Thermoplastic Polyimides (.pdf)
reinforced thermoplastics polyimides have. molding machine. The oil heated mold was set at 163°C. recently been commercialized to fulfill market demands of. (325°F). Screw speed was 50 RPM and injection speed. higher strength thermoplastics. The materials in question. was ~ 1 inch/sec
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Continuous-fiber Extrusions Make Strong Thermoplastics
. Printer-friendly version. Continuous-fiber extrusions make strong thermoplastics. Ben Shobert. Vice President. Polygon Co. Walkerton, Ind. www.polygon-cft.com. CFT materials are stronger, tougher, and more durable than fiberglass-reinforced plastic pultrusions. Tool handles, for instance, are less likely
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Next breakthrough material for military use could be carbon foam
, makes it an option for lightweight mirrors used in space-based telescopes and high-power lasers. The low thermal coefficient of thermal expansion of carbon foam makes it an economical alternative to conventional superalloys used in tooling for molding aerospace carbon-fiber-reinforced thermoset