DuPont™ Teflon ® PFA 450HP is a special purpose fluoroplasticresin available in pellet form. This resin is a chemically modifiedform of Teflon ® PFA 350 that combines many of the benefits of theparent resin (highest resistance to environmental stress-crackingwith a typical MIT folding endurance of 500,000*) with severaladditional benefits including enhanced purity, improved thermalstability while processing, and chemical inertness; for example, toozonated fluids. Table 1 shows the typical property data for Teflon® PFA 450HP.
标有PFA 450HP和PFA 450HP X的产品是等效的，本文档中的所有信息均适用于两者。
典型应用
杜邦™铁氟龙®PFA450HP的应用包括用于化学加工行业的管道，管道，阀门和配件的化学衬里，用于生产超纯化学品的无支撑管道衬里，半导体组件和用于高性能的流体处理组件化学品输送系统，其中需要纯度为十亿分之一的范围。Teflon®PFA450HP在涉及化学，热和机械应力的恶劣环境中需要延长服务的应用中是。
描述
杜邦™铁氟龙®PFA450HP是一种特殊用途的氟塑料树脂，可以颗粒形式提供。这种树脂是Teflon®PFA350的化学改性形式，结合了母树脂的许多优点（对环境应力开裂的Zui高抵抗力，典型的MIT折叠耐久性为500,000*）具有一些额外的好处，包括提高纯度，改善热量加工时的稳定性和化学惰性;例如，对臭氧化的流体。表1显示了Teflon®PFA450HP的典型属性数据。
Teflon®PFA450HP的熔体流动速率相对较低（典型的MFR为2），优质树脂具有Zui低水平的可萃取物，旨在满足超高纯度要求。当在涉及化学，热和机械应力的恶劣环境中需要延长使用时，Teflon®PFA450HP具有增强的抗环境应力开裂性能，是一种优选的树脂。Teflon®PFA450HP的纯度提高使其适用于需要改善颜色，降低可萃取氟化物和不受其他异物影响的应用。该产品不含任何添加剂，适用于需要纯度达到十亿分之一范围的恶劣化学环境。实例是半导体制造，工业或生命科学的流体处理系统，以及流体系统的测量的仪器。与其他热塑性塑料相比，Teflon®PFA450HP的高熔体强度和热稳定性可用于提高加工速率，将传统热塑性塑料的加工易用性与许多与聚四氟乙烯相似的性能相结合。
由纯Teflon®PFA450HP树脂制成的正确加工产品具有氟塑料树脂的卓越性能：化学惰性，优异的介电性能，耐热性，韧性和柔韧性，低摩擦系数，不粘特性，吸湿性可忽略不计，易燃性低，极端温度下的性能，以及出色的耐候性。
在火焰情况下，Teflon®PFA450HP产品不会点燃，也不会促进火焰蔓延。当被来自其他来源的火焰点燃时，它们对热量的贡献非常小并且以非常少的烟雾以缓慢的速率添加。
Teflon®PFA450HP符合ASTM D3307，Type II的要求
Teflon ® PFA 450HP is a relatively low melt flow rate (typicalMFR of 2), premium resin with the lowest level of extractablesdesigned to meet ultra-high purity requirements. An enhancedresistance to environmental stress-cracking makes Teflon ® PFA450HP a preferred resin when extended service is required inhostile environments involving chemical, thermal, and mechanicalstress. Additionally, the enhanced purity of Teflon ® PFA 450 HPmakes it suitable for applications that require improved color,lower extractable fluorides, and freedom from other foreignmaterials. This product contains no additives and is designed forhostile chemical environments where purity in the parts-per-billionrange is needed. Examples are in semiconductor manufacture, fluidhandling systems for industry or life sciences, and instrumentationfor precise measurements of fluid systems. Compared to otherthermoplastics, the high melt strength and thermal stability ofTeflon ® PFA 450HP can be used to improve processing rates,combining the processing ease of conventional thermoplastics withmany properties similar to those of polytetrafluoroethylene.
Properly processed products made from neat Teflon ® PFA 450HPresin provide the superior properties characteristic offluoroplastic resins: chemical inertness, exceptional dielectricproperties, heat resistance, toughness and flexibility, lowcoefficient of friction, non-stick characteristics, negligiblemoisture absorption, low flammability, performance at temperatureextremes, and excellent weather resistance.
In a flame situation, products of Teflon ® PFA 450HP resistignition and do not promote flame spread. When ignited by flamefrom other sources, their contribution of heat is very small andadded at a slow rate with very little smoke.
Teflon ® PFA 450HP meets the requirements of ASTM D3307, TypeII