Teflon® PFA 350T
全氟烷氧基
DuPont Fluoropolymers

产品说明

Applications for Teflon ® PFA 350 T include extruded tubing or hose for handling aggressive fluids at high pressures; chemical linings for pipes, valves and fittings used in the chemical processing industries; film for high flex service; traditional extruded or moulded articles requiring the unique performance of Teflon ® PFA 350 T.

Teflon ® PFA 350 T is a premium resin available in clear 2,5 mm 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 are improved colour, improved thermal stability and better mould release characteristics. Similar to Teflon ® PFA 350, this resin has a relatively low melt flow rate, high flex life and enhanced resistance to environmental stress cracking, compared to most other grades of Teflon ® PFA.

These additional benefits make PFA 350 T an ideal resin in applications like transfer moulding where the resin is exposed to high temperatures and long hold-up times.

Teflon ® PFA 350 T, like its parent resin PFA 350, is preferred when extended service is required in hostile environments involving chemical, thermal and mechanical stress. Compared to other fluoropolymers, its creep resistance at high service temperature provides a superior balance and level of end use properties.

Properly processed products made from virgin Teflon ® PFA 350 T resin provides the superior properties typical of the fluoropolymer resins: retention of physical properties after service at 260°C, useful properties at -196°C and chemical inertness to nearly all industrial chemicals and solvents. Dielectric properties are excellent. Moulded products have moderate stiffness and high ultimate elongation.

In a flame situation, products made of Teflon ® PFA 350 T resist ignition and do not themselves pro-
mote 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. Teflon ® PFA 350 T meets the requirements of ASTM D 3307, type II.

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   
     
 • 刚性，良好 • 良好的着色性  • 脱模性能良好 
 • 高 ESCR（抗应力裂纹） • 流动性低   
性能特点 • 抗溶解性 • 耐化学性良好  • 烟释放，低 
 • 良好的抗蠕变性 • 耐气候影响性能良好  • 延展性，高 
 • 良好的熔体强度 • 热稳定性，良好   
用途 • 衬里 • 管道  • 零件装置 
 • 阀门/阀门部件 • 管道   
     
机构评级 • ASTM D 3307 Type II    
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  2.12 到 2.17g/cm³  ASTM D792 
    ISO 1183 
     
熔流率 (372°C/5.0 kg)  2.0g/10 min ASTM D1238 
   ISO 1133 
     
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  15.2MPa  ISO 527-2 
     
断裂, 23°C  28.0MPa   
断裂, 250°C  14.0MPa   
伸长率    ASTM D638 
断裂, 23°C  300%  ISO 527-2 
     
断裂, 250°C  500%   
弯曲模量    ASTM D790 
23°C  625MPa  ISO 178 
     
250°C  69.0MPa   
1 / 2     
   
    
    
   
    
 
Teflon® PFA 350T  2012年9月30日 
全氟烷氧基   
DuPont Fluoropolymers   
硬度 额定值单位制 测试方法 
硬度计硬度 (邵氏 D) 55 ASTM D2240 
  ISO 868 
   
热性能 额定值单位制 测试方法 
最高连续使用温度 260°C  
熔融峰值温度 302 到 310°C ASTM D4591 
  ASTM D3418 
   
线形膨胀系数 - 流动  ASTM D696 
21 到 100°C 0.00014cm/cm/°C  
100 到 150°C 0.00018cm/cm/°C  
150 到 208°C 0.00022cm/cm/°C  
电气性能 额定值单位制 测试方法 
体积电阻率 > 1.0E+16ohm•cm ASTM D257 
  IEC 60093 
   
介电强度   
0.250 mm 2 > 80kV/mm ASTM D149 
0.250 mm 3 > 80kV/mm IEC 60243-1 
相对电容率   
60 Hz 2.03 ASTM D150 
  IEC 60250 
   
1 MHz 2.03 IEC 60250 
  ASTM D150 
   
耗散因数  ASTM D150 
60 Hz 0.00010 IEC 60250 
   
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 
  ISO 4589-2 
   
补充信息 额定值单位制 测试方法 
MIT Folding Endurance (180.0 到 200.0 µm) 2.0E+5Cycles ASTM D2176 
   
注射 额定值单位制  
螺杆长径比 24.0:1.0