Teflon PFA 451HP 美国科慕PFA材料
标有PFA 451HP和PFA 451HP X的产品是等效的，本文档中的所有信息均适用于这两种产品。
Teflon® PFA 451HP
Perfluoroalkoxy
DuPont Fluoropolymers
产品说明：
For inventory control purposes product name may be followed by an X.
Products labeled PFA 451HP and PFA 451HP X are equivalent and all information in this document is applicable to both.
Typical Application
Teflon ® PFA 451HP is preferred in applications where purity in the parts-per-billion range, surface smoothness, and the highest levels of chemical permeation resistance are required; including tubing, unsupported pipe linings for the production of ultra-pure chemicals, semiconductor components, and fluid handling components for high-performance chemical delivery systems where stress-crack resistance is critical.
Description
DuPont™ Teflon ® PFA 451HP is a special purpose fluoroplastic resin available in pellet form. This resin is a chemically modified form of Teflon ® PFA 350 that combines many of the advantages of the parent resin with several additional benefits. Teflon ® PFA 451HP exhibits improved surface smoothness achieved through minimization of spherulite size, enhanced chemical permeation resistance achieved by increasing its crystallinity from Teflon ® PFA 450HP, enhanced purity, and improved thermal stability while processing.
Teflon ® PFA 451HP is a relatively low melt flow rate (typical MFR of 2), premium resin with the lowest level of extractables designed to meet ultra-high purity requirements. An enhanced resistance to environmental stress-cracking and chemical permeation make Teflon ® PFA 451HP a preferred resin when extended service is required in hostile environments involving chemical, thermal, and mechanical stress. Additionally, the enhanced purity of Teflon ® PFA 451HP 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 for precise measurements of fluid systems. Compared to other thermoplastics, the high melt strength and thermal stability of Teflon ® PFA 451HP can be used to improve processing rates, combining the processing ease of conventional thermoplastics with many properties similar to those of polytetrafluoroethylene.
Properly processed products made from neat Teflon ® PFA 451HP 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 451HP 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 451HP meets the requirements of ASTM D3307, Type II
物性信息：
| 基本信息 | |
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| 特性 |
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| 用途 |
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| 机构评级 |
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| 形式 |
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| 加工方法 |
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| 物理性能 | 额定值 | 单位制 | 测试方法 |
|---|---|---|---|
| 比重 | 2.14 | g/cm³ | ASTM D792 |
| 熔流率（熔体流动速率） (372°C/5.0 kg) | 2.0 | g/10 min | ASTM D3307, ISO 12086 |
| 吸水率 (24 hr) | < 0.030 | % | ASTM D570 |
| 硬度 | 额定值 | 单位制 | 测试方法 |
|---|---|---|---|
| 肖氏硬度 (邵氏 D) | 55 | ASTM D2240, ISO 868 |
| 机械性能 | 额定值 | 单位制 | 测试方法 |
|---|---|---|---|
| 抗张强度 | ASTM D3307, ISO 12086 | ||
| 23°C | 33.0 | MPa | ASTM D3307, ISO 12086 |
| 200°C | 18.0 | MPa | ASTM D3307, ISO 12086 |
| 伸长率 | ASTM D3307, ISO 12086 | ||
| 断裂, 23°C | 360 | % | ASTM D3307, ISO 12086 |
| 断裂, 200°C | 500 | % | ASTM D3307, ISO 12086 |
| 弯曲模量 | ASTM D790, ISO 178 | ||
| 23°C | 410 | MPa | ASTM D790, ISO 178 |
| 200°C | 54.0 | MPa | ASTM D790, ISO 178 |
| 热性能 | 额定值 | 单位制 | 测试方法 |
|---|---|---|---|
| 熔融温度 | 305 | °C | ASTM D4591 |
| 电气性能 | 额定值 | 单位制 | 测试方法 |
|---|---|---|---|
| 体积电阻率 | 1.0E+18 | ohms·cm | ASTM D257, ISO 1325 |
| 介电强度 | |||
| 0.250 mm 1 | 80 | kV/mm | ASTM D149 |
| 0.250 mm | 80 | kV/mm | IEC 60243-1 |
| 介电常数 (1 MHz) | 2.03 | ASTM D150, IEC 60250 | |
| 耗散因数 (1 MHz) | < 2.0E-4 | ASTM D150, IEC 60250 |
| 可燃性 | 额定值 | 单位制 | 测试方法 |
|---|---|---|---|
| UL 阻燃等级 2 | V-0 | UL 94 | |
| 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 |
|---|---|---|---|
| Critical Shear Rate (372°C) | 12.0 | sec^-1 | |
| MIT Folding Endurance 3(200.0 µm) | 7.0E+3 | Cycles | ASTM D2176 |
| Weather and Chemical Resistance: Outstanding |
| 备注 | |
|---|---|
| 1 . | 方法A（短时间） |
| 2 . | These results are based on laboratory tests under controlled conditions and do not reflect performance under actual fire conditions, current rating is a typical theoretical value. |
| 3 . | Depending on fabrication conditions |
在火焰情况下，Teflon ? PFA 451HP 产品具有抗燃性且不会促进火焰蔓延。当被其他来源的火焰点燃时，它们的热量贡献非常小，并且以缓慢的速度添加，几乎没有烟雾。Teflon ? PFA 451HP 符合 ASTM D3307, Type II 的要求