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- W214759007 abstract "A new thermoforming/heat-treatment process yields complex-shaped dielectric film having electrical and shrinkage properties similar to those of flat Mylar film. This similarity should extend to other physical properties because the new process is directly analogous to the process used to prepare Mylar. Commercially available poly(ethylene terephthalate) film is formed into a cavity at approx. 110/sup 0/C and then heat treated at approx. 180/sup 0/C. A laboratory-scale forming apparatus has produced cylindrically shaped films having depth/diameter ratio approx. 1, a tapered wall-section, and variation in wall thickness of < 3X. Evaluation of other forming methods suggests that the production rate and thickness uniformity can be improved with existing technology. Thermal shrinkage at 150/sup 0/C, 1 kHz dielectric constant from -55 to +70/sup 0/C, leakage current at 1 kV, and breakdown voltage have been measured for both the complex-shaped film and Mylar. These comparative measurements indicate that the complex-shaped film could replace the flat Mylar dielectric currently used in energy-storage capacitors. A complex-shaped energy-storage capacitor could enhance safety in certain nuclear weapon applications by allowing strong-link devices in a firing set to be enclosed by a weak link." @default.
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- W214759007 date "1982-02-01" @default.
- W214759007 modified "2023-09-27" @default.
- W214759007 title "New process for preparing complex-shaped dielectric film similar to Mylar. [Polyethylene terephthalate]" @default.
- W214759007 hasPublicationYear "1982" @default.
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