Founded in 1968, PolyFab provides custom engineered plastic fabrications.
We work with many materials and specialize in clear plastics.
Some of the applications we have made include:
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We have researched and obtained advice from various sources on the different plastics available for the SCIGN radome and base plate. We have decided that both the hemispherical dome and the base plate and ring parts are best made by the injection molding process.
Before machining of the molds can be started, we must select the plastics to be used for each part. There are a great many plastics to choose from that can be used for injection molding. We first discuss some considerations and general properties of the resins we are considering using, and follow that with a comparison of properties and characteristcis of the several plastics we've zeroed in on as top choices for the radome itself.
Previous plastics used in various radome-type GPS antenna covers include lexan, acrylic, foams, ABS, Xenoy, and a variety of other polycarbonates and alloys. Fiberglass covers, and other inventive materials such as coated fabrics have been used in operational or prototyping, as well as plastics. We recognize from these experiences that opacity or low transmissivity of the GPS signal can occur from things like metallic additives, used in fiberglass and plastics either as a fire retardents or colorant.
Credit: Lexan Machining
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