| 초록 |
Gaskets are used to fill the gap between two irregular surfaces such as to prevent leakage of fluid. It can be defined as a static seal and consists of various shapes and materials depending on their applicable condition by the type of fluid, pressure, temperature etc. Sealability and thermal resistance to fluid are the most important perfomance at gaskets and recent market demands also increasing to high temperature with pressurized gasket. In case of the compressed joint sheets, which currently required high thermal resistance, carbon fiber and graphite material may using to improvement at thermal resistance characteristics because the complex consisting of organic bineders and ceramics has limited performance. However, carbon fiber has the disadvantage of having a high unit price, and graphite has limited processability, handing, rigidity and flexibility. In this study, we overcome the shortcomings of conventional carbon fiber or graphite-filled compression sheets by improving the thermal resistance of conventional non-asbestos compression joint sheets by utilizing expanded vermiculite with excellent heat resistance properties manufactured by expanding mineral nitrogen by gas. |
