PFA/PFA 345/The Chemours Company 物性表
PFA/PFA 345/The Chemours Company
规格用途
| 该料用途 | 泵件; 衬里; 电线电缆应用; 阀门/阀门部件; 管件; 配件 |
| 备注说明 | For inventory control purposes product name may be followed by an X.Products labeled PFA 345 and PFA 345 X are equivalent and all information in this document is applicable to both.Typical ApplicationApplications for DuPont™ Teflon ® PFA 345 include extruded tubing, wire and cable insulation, injection molded parts, and chemically resistant linings for bellows, valves, fittings, pipes, pumps, and other fluid-handling components.DescriptionDuPont™ Teflon ® PFA 345 is a medium melt flow rate fluoroplastic resin available in pellet form. Compared with Teflon ® PFA 340, it offers increased flex life and greater resistance to environmental stress-cracking (Teflon ® PFA 345 offers a typical MIT folding endurance of 50,000* compared to 15,000 in Teflon ® PFA 340). Table 1 shows the typical property data for Teflon ® PFA 345.Teflon ® PFA 345 is used when traditional extrusion and molding processes are required for producing products with the superior properties of a fluoroplastic resin. Compared to other thermoplastics, the high melt strength and thermal stability of Teflon ® PFA 345 can be used to improve processing rates. Compared with other fluoroplastics, creep resistance at high service temperatures provides a superior balance and level of end-use properties. Teflon ® PFA 345 combines the processing ease of conventional thermoplastics with many properties similar to those of polytetrafluoroethylene.Properly processed products made from neat Teflon® PFA 345 resin provide the superior properties characteristic of fluoroplastic resins: chemical inertness, exceptional dielectric properties, heat resistance, toughness and flexibility, low coefficient of friction, non-stick characteristics, negligible moisture absorption, low flammability, performance at temperature extremes, and excellent weather resistance.In a flame situation, products of Teflon ® PFA 345 resist ignition and do not 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.Teflon ® PFA 345 meets the requirements of ASTM D3307, Type III |
技术参数
| 性能项目 | 测试条件 | 测试方法 | 数值/描述 | 单位 | |
| 物理性能 | 密度 / 比重 | ASTM D792 | ꄉ.땰끑 | g/cm³ | 熔流率（熔体流动速率） | ASTM D3307, ISO 12086 | 372°C/5.0 kg | ꈱ. | g/10 min | 吸水率 | ASTM D570 | 24 hr | < .ꘃ | % |
| 硬度 | 肖氏硬度 | ASTM D2240, ISO 868 | 邵氏 D | ꈱꈱ | |
| 热性能 | 熔融温度 | ASTM D4591 | ꘃꈱ | °C | |
| 可燃性 | UL 阻燃等级 2 | UL 94 | 휉- | 极限氧指数 | ASTM D2863, ISO 4589-2 | > ꍒꈱ | % | Critical Shear Rate | 372°C | ꄉ땰. | sec^-1 | MIT Folding Endurance | ASTM D2176 | 200.0 µm | ꈱ.땈+끑 | Cycles |
| 电气性能 | 体积电阻率 | ASTM D257, ISO 1325 | 땰.땈+땰땱 | ohms·cm | 介电强度 | 0.250 mm, 方法A（短时间） | ASTM D149 | 땱 | kV/mm | 0.250 mm | IEC 60243-1 | 땱 | kV/mm | 介电常数 | ASTM D150, IEC 60250 | 1 MHz | ꄉ.ꘃ | 耗散因数 | ASTM D150, IEC 60250 | 1 MHz | < ꄉ.땈-끑 |
| 机械性能 | 抗张强度 | ASTM D3307, ISO 12086 | 23°C | ꄉꍒ. | MPa | 伸长率 | ASTM D3307, ISO 12086 | 断裂, 23°C | ꘃ | % | 弯曲模量 | ASTM D790, ISO 178 | 23°C | ꈱꈱ땰 | MPa |
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