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 內容編輯

Teflon® PFA 445 HP
全氟烷氧基
DuPont Fluoropolymers

產品說明

Teflon® PFA 445 HP 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 345 that combines many of the benefits of the parent resin with several new ones. Like Teflon® PFA 345, it offers great flex life and resistance to environmental stress cracking. The additional benefits are enhanced purity and improved thermal stability while processing.

The enhanced purity of Teflon® PFA 445 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 of precise measurements of fluid systems.

The improved thermal stability of Teflon® PFA 445 HP results in reduced amounts of bubbles in final parts and decreased corrosion of processing equipment. This resin can be processed at higher temperatures and higher rates than Teflon® PFA 345. Teflon® PFA 445 HP combines the processing ease of conventional thermoplastics with properties similar to those of polytetrafluoroethylene.

Properly processed products made from neat Teflon® PFA 445 HP resin provide the superior properties typical of the fluoropolymer resins: retention of physical 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 445 HP resist ignition and do not themselves promote flame spread. When ignited by flame from other sources, the contribution of heat is very small and added at a slow rate with very little smoke.

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  
    
 • 剛性，良好 • 耐化學性良好 • 煙釋放，低 
性能特點 • 高 ESCR（抗應力裂紋） • 耐氣候影響性能良好  
   • 延展性，高 
 • 抗溶解性 • 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 • 樹脂傳遞成型 • 注射成型 
 • 擠出 • 壓縮模塑  
    
    
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)  5.0g/10 min ASTM D1238 
吸水率 (24 hr)  0.010% 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  13.8MPa  
23°C  26.2MPa  
250°C  9.65MPa  
伸長率   ASTM D638 
斷裂, 23°C  320%  
斷裂, 250°C  480%  
彎曲模量   ASTM D790 
23°C  552MPa  
250°C  55.2MPa  
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  
線形膨脹系數 - 流動 (20 到 100°C)  0.00013cm/cm/°C ASTM D696 
電氣性能  額定值單位制 測試方法 
體積電阻率  1.0E+16ohm•cm ASTM D257 
介電強度  51kV/mm ASTM D149 
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Teflon® PFA 445 HP  2012年9月30日
全氟烷氧基  
DuPont Fluoropolymers  
電氣性能 額定值單位制 測試方法
介電常數  ASTM D150
60 Hz 2.10 
1 MHz 2.10 
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