For inventory control purposes product name may be followed by an X.

Products labeled PFA 445HP and PFA 445HP X are equivalent and all information in this document is applicable to both.

Typical Application
Applications for DuPont™ Teflon ® PFA 445HP include tubing, unsupported pipe linings for the production of ultra-pure chemicals, semiconductor components, and fluid handling components for high-performance chemical delivery systems where purity in the parts-per-billion range is needed.

Description
DuPont™ Teflon ® PFA 445HP is a special purpose fluoroplastic resin available in pellet form. This resin is a chemically modified form of Teflon ® PFA 345 that combines many of the benefits of the parent resin (excellent resistance to environmental stress-cracking with a typical MIT folding endurance of 50,000*) with several additional benefits including enhanced purity, improved thermal stability while processing, and chemical inertness; for example, to ozonated fluids. Table 1 shows the typical property data for Teflon ® PFA 445HP.

Teflon ® PFA 445HP is a premium resin with the lowest level of extractables designed to meet ultra-high purity requirements. Teflon ® PFA 445HP has a medium-range melt flow rate (typical MFR of 5), and the highest level of inertness due to stable end group polymer structure. The enhanced purity of Teflon ® PFA 445HP 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 445HP 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 445HP 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 445HP resist ignition and do not promote flame spread. When ignited by flame rom other sources, their contribution of heat is very small and added at a slow rate with very little smoke.

Teflon ® PFA 445HP meets the requirements of ASTM D3307, Type III

基本信息
特性	纯度高 低摩擦系数 低吸湿性 低烟度 高 ESCR（抗应力开裂） 良好的电气性能 良好的熔体强度 良好的柔韧性 流动性中等 耐化学性良好 耐气候影响性能良好 耐热性，中等 热稳定性，良好 韧性良好
用途	衬里 管件 液体处理
形式	粒子
加工方法	挤出 树脂传递成型 压缩模塑 注射成型

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)	5.0	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	26.0	MPa	ASTM D3307, ISO 12086
250°C	10.0	MPa	ASTM D3307, ISO 12086
伸长率			ASTM D3307, ISO 12086
断裂, 23°C	320	%	ASTM D3307, ISO 12086
断裂, 250°C	480	%	ASTM D3307, ISO 12086
弯曲模量			ASTM D790, ISO 178
23°C	551	MPa	ASTM D790, ISO 178
250°C	55.0	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)	21.0	sec^-1
MIT Folding Endurance 3(200.0 µm)	5.0E+4	Cycles	ASTM D2176