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聚三氟氯乙烯(PCTFE)是一種含F量49%的氟共聚物。其壓縮強度大，硬度高，蠕變小，具有塑料中最小的水汽透過率和極低的透氣性。聚三氟氯乙烯對紅外線、紫外線和可見光均有很高的透過率，又有耐超低溫的優良性能，宜制成用于高壓、低溫條件下的機械密封材料。
PCTFE is a copolymer that contains 49% fluorine. It has high compressive strength, high hardness,creep resistance, lowest moisture vapor transmission rate and very low gas permeance rate. Infrared、 traviolet and visible lights are easily to penetrate through PCTFE. It also has excellent properties under low temperature.
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高壓、高強度、低溫密封墊片，如液化天然氣（-160°C）和運輸船上控制閥門的墊片，耐腐蝕液石管，不透濕不透氣的包裝材料，對水氣敏感的藥物和電子元器件、薄膜、容器包裝等。
Sealing gaskets under high pressure, high strength and low temperature condition, ep. Valve gasket user for liquefied natural gas （-160°C）and vessels, anticorrosive tubings, electronic components, etc.
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