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PFA 450 HP, 高 ESCR（抗應力裂紋）, 流動性低, 抗溶解性, 耐氣候影響性 Teflon® PFA 450 HP 全氟烷氧基 DuPont Fluoropolymers 產品說明 DuPont™ Teflon® PFA 450 HP fluoropolymer is a special purpose resin available in clear, 2.5-mm (0.1-in.) pellets. This resin is a chemically modified form of Teflon® PFA 350 that combines many of the benefits of the parent resin with several new ones. The additional benefits may include enhanced purity, improved thermal stability while processing and chemical inertness, for example, to ozonated fluids. Similar to Teflon® PFA 350, this resin has a relatively low flow rate, long flex life, and enhanced resistance to enviromental stress cracking compared with most other grades of Teflon® PFA. The enhanced purity of Teflon® PFA 450 HP makes it suitable for applications that require improved color, lower extractable fluorides, and freedom from other foreign materials. This product contains no additives and is designed for hostile chemical environments where purity in the parts-per-billion range is needed. Examples are in semiconductor manufacture, fluid handling systems for industry or life sciences, and instrumentation for precise measurements of fluid systems. Teflon® PFA 450 HP is preferred when extended service is required in hostile environments involving chemical, thermal, and mechanical stress. The improved thermal stability of Teflon® PFA 450 HP results in reduced amounts of bubbles in final parts and decreased corrosion of processing equipment. Teflon® PFA 450 HP combines the processing ease of conventional thermoplastics with properties similar to those of polytetrafluoroethylene. Properly processed products made from neat Teflon® PFA 450 HP resin provide the superior properties typical of fluoropolymer resins: retention of properties after service at 260°C (500°F), useful properties at -196°C (-320°F), and chemical inertness to nearly all industrial chemicals and solvents. Dielectric properties are excellent. Molded products have moderate stiffness and high ultimate elongation. In a flame situation, products of Teflon® PFA 450 HP resist ignition and do not themselves promote flame spread. When ignited by flame from other sources, their contribution of heat is very small and added at a slow rate with very little smoke. Statements, or data, regarding behavior in a flame situation are not intended to reflect hazards presented by this or any other material when under actual fire conditions. 總體材料狀態 • 已商用：當前有效供貨地區 • 北美洲 • 歐洲 • 南美洲 • 亞太地區 • High Purity • 抗溶解性 • 耐化學性良好性能特點 • 剛性，良好 • 良好的熔體強度 • 耐氣候影響性能良好 • 高 ESCR（抗應力裂紋） • 流動性低 • 熱穩定性，良好用途 • 襯里 • 管道外觀 • 清晰/透明形式 • 顆粒料加工方法 • 吹塑成型 • 壓縮模塑 • 擠出 • 注射成型物理性能額定值單位制測試方法比重 2.14g/cm³ ASTM D792 熔流率 (372°C/5.0 kg) 2.0g/10 min ASTM D1238 吸水率 (24 hr) 0.030% ASTM D570 機械性能額定值單位制測試方法抗張強度 ASTM D638 屈服, 23°C 15.2MPa 23°C 27.6MPa 250°C 13.8MPa 伸長率 ASTM D638 斷裂, 23°C 300% 斷裂, 250°C 500% 彎曲模量 ASTM D790 23°C 621MPa 250°C 68.9MPa 硬度額定值單位制測試方法硬度計硬度 (邵氏 D) 55 ASTM D2240 熱性能額定值單位制測試方法熔融溫度 302 到 310°C Teflon® PFA 450 HP 2012年9月30日全氟烷氧基 DuPont Fluoropolymers 熱性能額定值單位制測試方法線形膨脹系數 - 流動 ASTM D696 21 到 100°C 0.00014cm/cm/°C 100 到 149°C 0.00018cm/cm/°C 149 到 209°C 0.00022cm/cm/°C 電氣性能額定值單位制測試方法體積電阻率 1.0E+18ohm•cm ASTM D257 介電強度 2 (0.254 mm) 79kV/mm ASTM D149 介電常數 ASTM D150 60 Hz 2.03 1 MHz 2.03 耗散因數 ASTM D150 60 Hz 0.00010 1 MHz 0.00010 可燃性額定值單位制測試方法極限氧指數 95% ASTM D2863

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