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 內容編輯

Teflon® PFA 345
全氟烷氧基
DuPont Fluoropolymers

產品說明

Teflon® PFA 345 is a medium-flow-rate resin available in clear 2.5-mm (0.1-in.) pellets. Compared with Teflon® PFA 340, it offers increased flex life and greater resistance to environmental stress cracking.

All grades of Teflon® PFA combine the processing ease of conventional thermoplastics with properties similar to those of Teflon® PTFE fluorocarbon resin. They have high melt strength, stability at high processing temperatures, and resistance to creep at high service temperatures.

Teflon® PFA retains its properties after service at 260°C (500°F) and has useful properties at temperatures as low as -196°C (-320°F). It is inert to nearly all industrial chemicals and solvents, and its dielectric properties are excellent. Products made with Teflon® PFA have moderate stiffness and high elongation.

In a flame situation, products of Teflon® PFA 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.

總體

材料狀態 • 已商用：當前有效   
供貨地區 • 北美洲 • 歐洲  
 • 拉丁美洲 • 亞太地區  
    
 • 剛性，良好 • 良好的熔體強度 • 煙釋放，低 
性能特點 • 高 ESCR（抗應力裂紋） • 流動性中等  
 • 抗溶解性 • 耐化學性良好 • 延展性，高 
    
 • 良好的抗蠕變性 • 耐氣候影響性能良好  
用途 • 泵件 • 電線電纜應用 • 管道 
 • 襯里 • 閥門/閥門部件 • 零件裝置 
    
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)  6.5g/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  29.0MPa ASTM D638 
伸長率 (斷裂)  300% ASTM D638 
彎曲模量  690MPa ASTM D790 
沖擊性能  額定值單位制 測試方法 
懸壁梁缺口沖擊強度 (23°C)  無斷裂 ASTM D256 
硬度  額定值單位制 測試方法 
硬度計硬度 (邵氏 D)  60 ASTM D2240 
熱性能  額定值單位制 測試方法 
熔融溫度  305°C  
線形膨脹系數 - 流動 (38 到 71°C)  0.00016cm/cm/°C ASTM D696 
導熱系數  0.22W/m/K ASTM C177 
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 (0.0250 mm)  80kV/mm ASTM D149 
介電常數   ASTM D150 
60 Hz  2.10  
1.00 GHz  2.10  
耗散因數   ASTM D150 
60 Hz  0.00060  
1.00 GHz  0.00060  
可燃性  額定值單位制 測試方法 
UL 阻燃等級  V-0 UL 94