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Teflon® PFA 440 HP
全氟烷氧基
DuPont Fluoropolymers

产品说明

DuPont™ Teflon® PFA 440 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 340 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.

The enhanced purity of Teflon® PFA 440 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.

The improved thermal stability of Teflon® PFA 440 HP results in reduced amounts of bubbles in final parts and decreased corrosion of processing equipment. Teflon® PFA 440 HP combines the processing ease of conventional thermoplastics with properties similar to those of polytetrafluoroethylene.

Properly processed products made from neat Teflon® PFA 440 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.

Three categories (A, B, and D) of Teflon® PFA 440 HP resin covering a broad range of melt flow rates (MFR) are available. The low MFR resin provides a higher degree of stress crack resistance while the high MFR resin is easier to process.

In a flame situation, products of Teflon® PFA 440 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.

总体

材料状态 • 已商用：当前有效   
供货地区 • 北美洲 • 欧洲  
 • 南美洲 • 亚太地区  
    
性能特点 • 刚性，良好 • 耐化学性良好 • 烟释放，低 
 • 抗溶解性 • 热稳定性，良好 • 延展性，高 
    
用途 • 衬里 • 管道  
外观 • 清晰/透明   
形式 • 颗粒料   
加工方法 • 吹塑成型 • 树脂传递成型 • 注射成型 
 • 挤出 • 压缩模塑  
    
    
物理性能  额定值单位制 测试方法 
比重  2.14g/cm³ ASTM D792 
吸水率 (24 hr)  0.030% ASTM D570 
机械性能  额定值单位制 测试方法 
抗张强度   ASTM D638 
屈服, 23°C  13.8MPa  
23°C  24.8MPa  
250°C  12.4MPa  
伸长率   ASTM D638 
断裂, 23°C  300%  
断裂, 250°C  480%  
弯曲模量   ASTM D790 
23°C  586MPa  
250°C  55.2MPa  
硬度  额定值单位制 测试方法 
硬度计硬度 (邵氏 D)  55 ASTM D2240 
热性能  额定值单位制 测试方法 
熔融温度  302 到 310°C  
线形膨胀系数 - 流动   ASTM D696 
21 到 100°C  0.00014cm/cm/°C 
100 到 149°C  0.00017cm/cm/°C 
149 到 209°C  0.00021cm/cm/°C 
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Teflon® PFA 440 HP  2012年9月30日
全氟烷氧基  
DuPont Fluoropolymers  
电气性能 额定值单位制 测试方法
体积电阻率 1.0E+18ohm•cm ASTM D257
介电强度 2 (0.254 mm) 79kV/mm ASTM D149
介电常数  ASTM D150
60 Hz 2.03 
1 MHz 2.03 
耗散因数  ASTM D150
60 Hz 0.00010 
1 MHz 0.00010 
可燃性 额定值单位制 测试方法
极限氧指数 95% ASTM D2863
补充信息  
Specific Gravity, ASTM D790: 2.12 to 2.17
Melt Flow Rate, ASTM D1238, 372°C/5.0 kg: 12 to 15 g/10 min (B grade)
Melt Flow Rate, ASTM D1238, 372°C/5.0 kg: 14 to 19 g/10 min (A grade)
Melt Flow Rate, ASTM D1238, 372°C/5.0 kg: 18 to 21 g/10 min (D grade)
Upper Service Temperature: 500°F
MIT Folding Endurance, ASTM D2176, 0.18 to 0.20 mm (0.007 to 0.008 in): 15000 cycles
MIT Folding Endurance, ASTM D2176, 0.50 mm (0.020 in): 10000 cycles
Weather and Chemical Resistance: Outstanding

备注
1 一般属性：这些不能被视为规格。

2 方法A（短时间）