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PFA 340, 良好的熔體強度, 流動性高, 抗溶解性, 薄膜, 電器導線絕緣材料
Teflon® PFA 340
全氟烷氧基
DuPont Fluoropolymers
產(chǎn)品說明
DuPont™ Teflon® PFA 340 is a general-purpose resin available in clear, 2.5-mm (0.1-in.) pellets. Compared with other grades of Teflon® PFA, its most unique features are a relatively high flow rate and properties that make it suitable for a variety of processes and demanding end uses.
Teflon® PFA 340 and the other Teflon® PFA (perfluoroalkoxy) fluoropolymer resins combine the processing ease of conventional thermoplastics with properties similar to those of polytetrafluoroethylene. They have high melt strength, stability at high processing temperatures, and resistance to creep at high service temperature.
Teflon® PFA 340 is used when traditional extrusion and molding processes are required for producing products with the superior properties of a fluoropolymer resin. For a given process, its high melt strength and thermal stability can be used to improve rates. Compared with other fluoropolymers, its creep resistance at its high service temperatures provides a superior balance and level of end-use properties.
Properly processed products made from neat Teflon® PFA 340 resin provide the superior properties typical of the 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 constant and dissipation factor are exceptionally low. Molded products have moderate stiffness and high ultimate elongation.
In a flame situation, products of Teflon® PFA 340 resist ignition and do not themselves promote flame spread. When ignited by flame from other sources, their contribution of heat is small and 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(tài) • 已商用：當前有效
供貨地區(qū) • 北美洲 • 歐洲
• 南美洲 • 亞太地區(qū)
• 剛性，良好 • 良好的熔體強度 • 耐氣候影響性能良好
性能特點 • 抗溶解性 • 流動性高 • 煙釋放，低
• 良好的抗蠕變性 • 耐化學性良好 • 延展性，高
用途 • 薄膜 • 工業(yè)領(lǐng)域： • 管道
• 電器導線絕緣材料 • 管道 • 型材
外觀 • 清晰/透明
形式 • 顆粒料
加工方法 • 擠出 • 壓縮模塑
• 樹脂傳遞成型 • 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) 14g/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 13.8MPa
23°C 24.8MPa
250°C 12.4MPa
伸長率 ASTM D638
斷裂, 23°C 300%
斷裂, 250°C 480%
彎曲模量 ASTM D790
23°C 586MPa
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(shù) - 流動 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 340 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
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(shù) ASTM D150
60 Hz 2.03
1 MHz 2.03
耗散因數(shù) 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(shù) 95% ASTM D2863
補充信息
Specific Gravity, ASTM D792: 2.12 to 2.17
MIT Folding Endurance, 0.18 to 0.2mm (0.007 to 0.008 in): 15000 cycles
Water Absorption, ASTM D696: <0.03 %
Limiting Oxygen Index, ASTM D2863: >95%
Upper Service Temperature: 500°F
Weather and Chemical Resistance: Outstanding
注射 額定值單位制
螺筒后部溫度 316 到 332°C
螺筒中部溫度 329 到 343°C
螺筒前部溫度 371°C
射嘴溫度 371°C
加工（熔體）溫度 343 到 399°C
模具溫度 149 到 260°C
注塑溫度 20.7 到 55.2MPa
注射速度 慢
合模力 6.9kN/cm²
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