Deposition of Protective Layer on Stealth Sheet and Evaluation of the Protected Sheet's Mechanical Performance
KOREAN JOURNAL OF OPTICS AND PHOTONICS(2023)
摘要
We report the results of evaluating the hardness, flexibility, and adhesion between the protective layer and the stealth sheet after applying a protective layer to improve the practicality of the flexible stealth sheet. The result of the ISO 15184 pencil hardness test showed that the hardness increased from HB to 3H by three grades when a protective layer was applied. The flexibility evaluation was conducted by bending the material against cylinders of certain diameters and observing whether cracks occurred according to the ASTM D522 test method. The result showed that the minimum diameter was 0.125 inches. The adhesion was evaluated by using the ASTM D3359 test method, attaching and peeling off an adhesive strip to the protective layer and determining the proportion of the protective layer peeling off. The result was 5B, which is better than the military adhesion limit of 4B.
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关键词
Adhesion,Flexibility,Grayscale,Hardness,Protective layer
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