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 Application
Applications 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.

Description
DuPont™ 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

基本信息
特性	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 良好的抗蠕变性 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	泵件 衬里 电线电缆应用 阀门/阀门部件 管件 配件
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 (23°C)	29.0	MPa	ASTM D3307, ISO 12086
伸长率 (断裂, 23°C)	300	%	ASTM D3307, ISO 12086
弯曲模量 (23°C)	551	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