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

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 流动性低 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 食品接触的合规性
用途	衬里 管道系统 管件 液体处理
机构评级	FDA 21 CFR 177.1550 欧洲 10/1/2011 12:00:00 AM
形式	粒子
加工方法	吹塑成型 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)	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